/* ===== Variables ===== */
:root {
  --bg: #fafaf9;
  --surface: #ffffff;
  --surface-hover: #fff7ed;
  --border: #e7e5e4;
  --border-hover: #fdba74;
  --text: #1c1917;
  --text-muted: #78716c;
  --text-dim: #a8a29e;
  --primary: #f97316;
  --primary-hover: #ea580c;
  --primary-soft: #fff7ed;
  --primary-glow: rgba(249, 115, 22, 0.2);
  --success: #10b981;
  --success-bg: #ecfdf5;
  --success-text: #059669;
  --radius-xl: 24px;
  --radius-lg: 16px;
  --radius-md: 12px;
  --radius-sm: 8px;
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.06);
  --shadow-md: 0 8px 32px rgba(0, 0, 0, 0.08);
  --shadow-glow: 0 0 40px var(--primary-glow);
}

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

html {
  scroll-behavior: smooth;
}

body {
  min-height: 100vh;
  font-family: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  color: var(--text);
  line-height: 1.6;
  background: var(--bg);
  overflow-x: hidden;
}

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

ul, ol {
  list-style: none;
}

/* ===== Particle Canvas ===== */
.particle-canvas {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  pointer-events: none;
}

/* ===== Gradient Orbs ===== */
.gradient-orb {
  position: fixed;
  border-radius: 50%;
  filter: blur(80px);
  pointer-events: none;
  z-index: 0;
  will-change: transform;
}

.orb-1 {
  width: 500px;
  height: 500px;
  top: -150px;
  left: -100px;
  background: radial-gradient(circle, rgba(249, 115, 22, 0.08), transparent 70%);
  animation: floatOrb1 12s ease-in-out infinite;
}

.orb-2 {
  width: 400px;
  height: 400px;
  top: 30%;
  right: -120px;
  background: radial-gradient(circle, rgba(251, 146, 60, 0.06), transparent 70%);
  animation: floatOrb2 15s ease-in-out infinite;
}

.orb-3 {
  width: 350px;
  height: 350px;
  bottom: -100px;
  left: 30%;
  background: radial-gradient(circle, rgba(249, 115, 22, 0.05), transparent 70%);
  animation: floatOrb3 18s ease-in-out infinite;
}

/* ===== Container ===== */
.container-custom {
  width: min(1200px, calc(100% - 40px));
  margin: 0 auto;
}

/* ===== Glass Card ===== */
.glass-card {
  position: relative;
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  background: var(--surface);
  box-shadow: var(--shadow-sm);
  transition: transform 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
}

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

/* ===== Navigation ===== */
.glass-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: 16px 0;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
}

.nav-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 12px;
}

.logo-icon {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  display: grid;
  place-items: center;
  background: linear-gradient(135deg, var(--primary), #fb923c);
  color: #fff;
  box-shadow: 0 4px 16px var(--primary-glow);
}

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

.brand-title {
  font-size: 17px;
  font-weight: 800;
  letter-spacing: -0.02em;
}

.brand-subtitle {
  font-size: 12px;
  color: var(--text-muted);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 6px;
}

.nav-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-muted);
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  transition: color 0.2s, background 0.2s;
}

.nav-link:hover {
  color: var(--text);
  background: var(--surface-hover);
}

.nav-link-cta {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  font-weight: 600;
  color: #fff;
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  background: linear-gradient(135deg, var(--primary), #fb923c);
  box-shadow: 0 4px 16px var(--primary-glow);
  transition: transform 0.2s, box-shadow 0.2s;
}

.nav-link-cta:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 24px var(--primary-glow);
}

/* ===== Hero Section ===== */
.hero-section {
  position: relative;
  z-index: 1;
  padding: 120px 0 60px;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.3fr 0.7fr;
  gap: 20px;
  align-items: start;
}

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

.hero-card {
  padding: 48px 40px;
}

.badge-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  font-weight: 700;
  color: var(--primary);
  background: var(--primary-soft);
  padding: 6px 14px;
  border-radius: 999px;
  margin-bottom: 20px;
  width: fit-content;
}

.hero-title {
  font-size: clamp(30px, 4.5vw, 48px);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.03em;
  margin-bottom: 16px;
}

.gradient-text {
  background: linear-gradient(135deg, var(--primary), #fbbf24);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-description {
  font-size: 15px;
  color: var(--text-muted);
  max-width: 560px;
  margin-bottom: 28px;
  line-height: 1.7;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 32px;
}

/* ===== Buttons ===== */
.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  font-size: 14px;
  font-weight: 700;
  color: #fff;
  background: linear-gradient(135deg, var(--primary), #fb923c);
  border: none;
  border-radius: 999px;
  cursor: pointer;
  transition: transform 0.2s, box-shadow 0.2s;
  box-shadow: 0 4px 20px var(--primary-glow);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 32px var(--primary-glow);
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  font-size: 14px;
  font-weight: 600;
  color: var(--text);
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 999px;
  cursor: pointer;
  transition: color 0.2s, border-color 0.2s, background 0.2s;
}

.btn-secondary:hover {
  color: var(--primary);
  border-color: var(--border-hover);
  background: var(--surface-hover);
}

.btn-dark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  font-size: 14px;
  font-weight: 700;
  color: var(--text);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 999px;
  cursor: pointer;
  transition: transform 0.2s, background 0.2s, border-color 0.2s;
}

.btn-dark:hover {
  transform: translateY(-2px);
  background: var(--surface-hover);
  border-color: var(--border-hover);
}

.btn-full {
  width: 100%;
}

/* ===== Metrics ===== */
.metrics-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
}

.metric-card {
  display: flex;
  gap: 12px;
  padding: 16px;
  border-radius: var(--radius-md);
  background: var(--surface);
  border: 1px solid var(--border);
}

.metric-icon {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  display: grid;
  place-items: center;
  background: var(--primary-soft);
  color: var(--primary);
  flex-shrink: 0;
}

.metric-content {
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.metric-label {
  font-size: 11px;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 2px;
}

.metric-value {
  font-size: 28px;
  font-weight: 800;
  line-height: 1.2;
  background: linear-gradient(135deg, var(--primary), #fbbf24);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.metric-desc {
  font-size: 12px;
  color: var(--text-dim);
  margin-top: 2px;
  line-height: 1.5;
}

/* ===== Hero Sidebar ===== */
.hero-sidebar {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

/* ===== Status Card ===== */
.status-card {
  padding: 24px;
}

.status-header {
  margin-bottom: 12px;
}

.status-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  font-weight: 700;
  color: var(--success-text);
  background: var(--success-bg);
  padding: 6px 12px;
  border-radius: 999px;
}

.pulse-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--success);
  box-shadow: 0 0 0 rgba(16, 185, 129, 0.45);
  animation: pulse 2s infinite;
}

.card-title {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 8px;
}

.card-description {
  font-size: 14px;
  color: var(--text-muted);
  margin-bottom: 14px;
  line-height: 1.6;
}

.feature-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.feature-list li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 13px;
  color: var(--text-muted);
  line-height: 1.5;
}

.feature-list li i,
.feature-list li svg {
  color: var(--success-text);
  flex-shrink: 0;
  margin-top: 2px;
}

/* ===== Claude Card ===== */
.claude-card {
  padding: 24px;
  border-color: rgba(99, 102, 241, 0.2);
  background: #eef2ff;
}

.claude-card:hover {
  border-color: rgba(99, 102, 241, 0.4);
}

.claude-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  font-weight: 700;
  color: #6366f1;
  background: rgba(99, 102, 241, 0.12);
  padding: 5px 12px;
  border-radius: 999px;
  margin-bottom: 12px;
}

.claude-card .card-title {
  color: #312e81;
}

.claude-card .feature-list li i,
.claude-card .feature-list li svg {
  color: #6366f1;
}

.claude-card .btn-primary {
  background: linear-gradient(135deg, #6366f1, #818cf8);
  box-shadow: 0 4px 20px rgba(99, 102, 241, 0.3);
  margin-top: 16px;
}

.claude-card .btn-primary:hover {
  box-shadow: 0 8px 32px rgba(99, 102, 241, 0.4);
}

/* ===== Notice Section ===== */
.notice-section {
  position: relative;
  z-index: 1;
  padding: 0 0 40px;
}

.notice-card {
  display: flex;
  align-items: center;
  gap: 20px;
  padding: 24px 32px;
  border-color: #fde68a;
  background: #fffbeb;
}

.notice-card:hover {
  border-color: #fbbf24;
}

.notice-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  display: grid;
  place-items: center;
  background: #fef3c7;
  color: #d97706;
  flex-shrink: 0;
}

.notice-content {
  flex: 1;
  min-width: 0;
}

.notice-title {
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 4px;
}

.notice-description {
  font-size: 13px;
  color: var(--text-muted);
  line-height: 1.6;
}

.notice-actions {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-shrink: 0;
}

.notice-group-id {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  color: var(--text-dim);
}

/* ===== Section Common ===== */
.section-header {
  text-align: center;
  margin-bottom: 32px;
}

.section-title {
  font-size: 28px;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 8px;
}

.section-description {
  font-size: 15px;
  color: var(--text-muted);
}

/* ===== Entry Section ===== */
.entry-section {
  position: relative;
  z-index: 1;
  padding: 40px 0;
}

.entry-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}

.entry-card {
  display: block;
  padding: 28px;
  overflow: hidden;
  cursor: pointer;
}

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

.entry-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 12px;
}

.entry-label {
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-dim);
}

.entry-arrow {
  color: var(--primary);
  transition: transform 0.2s;
}

.entry-card:hover .entry-arrow {
  transform: translate(2px, -2px);
}

.entry-title {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 8px;
}

.entry-description {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 16px;
}

.entry-icon {
  color: var(--text-dim);
  opacity: 0.3;
}

.entry-icon i,
.entry-icon svg {
  width: 48px;
  height: 48px;
}

/* ===== Guide Section ===== */
.guide-section {
  position: relative;
  z-index: 1;
  padding: 40px 0;
}

.guide-grid {
  display: grid;
  gap: 16px;
}

.guide-card {
  padding: 28px;
  display: flex;
  gap: 20px;
  align-items: flex-start;
}

.guide-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}

.guide-step {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
}

.step-number {
  font-size: 24px;
  font-weight: 800;
  background: linear-gradient(135deg, var(--primary), #fbbf24);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.step-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  display: grid;
  place-items: center;
  background: var(--primary-soft);
  color: var(--primary);
}

.guide-content {
  flex: 1;
  min-width: 0;
}

.guide-title {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 8px;
}

.guide-description {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 12px;
}

.guide-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  font-weight: 600;
  color: var(--primary);
  transition: gap 0.2s;
}

.guide-link:hover {
  gap: 10px;
}

/* ===== Contact Section ===== */
.contact-section {
  position: relative;
  z-index: 1;
  padding: 40px 0;
}

.contact-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 16px;
}

.contact-card {
  padding: 32px;
}

.contact-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}

.contact-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  display: grid;
  place-items: center;
  background: var(--primary-soft);
  color: var(--primary);
  margin-bottom: 16px;
}

.contact-icon i,
.contact-icon svg {
  width: 24px;
  height: 24px;
}

.contact-title {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 8px;
}

.contact-description {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.6;
}

.contact-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 20px;
}

.contact-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-top: 8px;
}

.contact-list li {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background: var(--surface);
}

.contact-list li > i,
.contact-list li > svg {
  color: var(--primary);
  flex-shrink: 0;
  margin-top: 4px;
}

.contact-label {
  display: block;
  font-size: 12px;
  color: var(--text-dim);
  margin-bottom: 2px;
}

.contact-value {
  font-size: 14px;
  font-weight: 600;
}

/* ===== Footer ===== */
.footer {
  position: relative;
  z-index: 1;
  padding: 32px 0;
  border-top: 1px solid var(--border);
  margin-top: 20px;
}

.footer-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 20px;
}

.footer-brand {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 16px;
  font-weight: 700;
}

.footer-logo i,
.footer-logo svg {
  color: var(--primary);
}

.footer-tagline {
  font-size: 13px;
  color: var(--text-dim);
}

.footer-links {
  display: flex;
  gap: 20px;
}

.footer-links a {
  font-size: 14px;
  color: var(--text-muted);
  transition: color 0.2s;
}

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

.footer-bottom {
  text-align: center;
  padding-top: 16px;
  border-top: 1px solid var(--border);
}

.footer-bottom p {
  font-size: 13px;
  color: var(--text-dim);
}

/* ===== Reveal Animation ===== */
.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* ===== Focus ===== */
:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}

/* ===== Animations ===== */
@keyframes pulse {
  0% { box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.45); }
  70% { box-shadow: 0 0 0 10px rgba(16, 185, 129, 0); }
  100% { box-shadow: 0 0 0 0 rgba(16, 185, 129, 0); }
}

@keyframes floatOrb1 {
  0%, 100% { transform: translate(0, 0); }
  50% { transform: translate(30px, 20px); }
}

@keyframes floatOrb2 {
  0%, 100% { transform: translate(0, 0); }
  50% { transform: translate(-20px, 30px); }
}

@keyframes floatOrb3 {
  0%, 100% { transform: translate(0, 0); }
  50% { transform: translate(15px, -25px); }
}

/* ===== Responsive ===== */
@media (max-width: 900px) {
  .hero-grid {
    grid-template-columns: 1fr;
  }

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

  .notice-card {
    flex-direction: column;
    text-align: center;
  }

  .notice-actions {
    flex-direction: column;
    align-items: center;
  }
}

@media (max-width: 640px) {
  .hero-section {
    padding: 90px 0 40px;
  }

  .hero-card {
    padding: 28px 20px;
  }

  .nav-content {
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
  }

  .nav-links {
    width: 100%;
    flex-wrap: wrap;
  }

  .nav-link, .nav-link-cta {
    flex: 1;
    justify-content: center;
    min-width: 0;
    text-align: center;
  }

  .glass-nav {
    padding: 12px 0;
  }

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

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

  .guide-card {
    flex-direction: column;
  }

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

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

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

  .contact-actions .btn-primary,
  .contact-actions .btn-secondary {
    width: 100%;
  }

  .footer-content {
    flex-direction: column;
    align-items: flex-start;
    gap: 16px;
  }

  .footer-links {
    flex-wrap: wrap;
    gap: 12px;
  }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation: none !important;
    transition: none !important;
  }
  .reveal { opacity: 1; transform: none; }
}