:root {
  --color-primary: #3b82f6;
  --color-primary-light: #60a5fa;
  --color-primary-dark: #2563eb;
  --color-secondary: #93c5fd;
  --color-bg: #f0f7ff;
  --color-paper: #ffffff;
  --color-text: #1e293b;
  --color-text-secondary: #64748b;
  --color-border: rgba(59, 130, 246, 0.12);
  --shadow-sm: 0 4px 20px rgba(59, 130, 246, 0.08);
  --shadow-md: 0 8px 30px rgba(59, 130, 246, 0.12);
  --shadow-lg: 0 20px 60px rgba(59, 130, 246, 0.16);
  --radius: 16px;
  --radius-sm: 12px;
  --radius-xs: 8px;
  --max-width: 1200px;
  --header-height: 72px;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-height) + 16px);
}

body {
  font-family: "Inter", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  background-color: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

.page-bg {
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background:
    radial-gradient(circle at 10% 10%, rgba(59, 130, 246, 0.08) 0%, transparent 45%),
    radial-gradient(circle at 90% 20%, rgba(147, 197, 253, 0.10) 0%, transparent 40%),
    radial-gradient(circle at 70% 80%, rgba(59, 130, 246, 0.05) 0%, transparent 40%);
}

.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

.gradient-text {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 12px 24px;
  border-radius: var(--radius-xs);
  font-weight: 600;
  font-size: 0.95rem;
  text-decoration: none;
  border: 1px solid transparent;
  cursor: pointer;
  transition: all 0.2s ease;
  white-space: nowrap;
}

.btn--lg {
  padding: 14px 28px;
  font-size: 1rem;
}

.btn--xl {
  padding: 16px 32px;
  font-size: 1rem;
}

.btn--primary {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  color: #fff;
  box-shadow: 0 4px 16px rgba(59, 130, 246, 0.35);
}

.btn--primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(59, 130, 246, 0.45);
}

.btn--ghost {
  background: rgba(255, 255, 255, 0.7);
  color: var(--color-text);
  border-color: var(--color-border);
  backdrop-filter: blur(8px);
}

.btn--ghost:hover {
  background: #fff;
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.btn--outline {
  background: transparent;
  color: var(--color-text);
  border-color: var(--color-border);
}

.btn--outline:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
  background: rgba(59, 130, 246, 0.04);
}

.icon-gitee-badge {
  height: 1.25em;
  width: auto;
  display: inline-block;
  vertical-align: middle;
}

/* Header */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: var(--header-height);
  display: flex;
  align-items: center;
  background: rgba(245, 247, 255, 0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
  transform: translateY(-100%);
  transition: transform 0.4s ease, box-shadow 0.3s ease, background 0.3s ease;
}

.site-header--visible {
  transform: translateY(0);
}

.site-header--scrolled {
  box-shadow: var(--shadow-sm);
  background: rgba(245, 247, 255, 0.95);
}

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

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
}

.brand-logo {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  object-fit: cover;
  box-shadow: 0 4px 12px rgba(59, 130, 246, 0.25);
}

.brand-text {
  font-size: 1.35rem;
  font-weight: 800;
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav-link {
  padding: 8px 16px;
  border-radius: var(--radius-xs);
  color: var(--color-text-secondary);
  text-decoration: none;
  font-weight: 500;
  font-size: 0.95rem;
  transition: all 0.2s ease;
}

.nav-link:hover {
  color: var(--color-primary);
  background: rgba(59, 130, 246, 0.06);
}

.nav-link--cta {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  color: #fff;
  margin-left: 4px;
}

.nav-link--cta:hover {
  color: #fff;
  box-shadow: 0 4px 12px rgba(59, 130, 246, 0.3);
}

.menu-toggle {
  display: none;
  width: 44px;
  height: 44px;
  border: none;
  border-radius: var(--radius-xs);
  background: rgba(59, 130, 246, 0.08);
  color: var(--color-text);
  font-size: 1.25rem;
  cursor: pointer;
}

/* Mobile menu */
.mobile-menu {
  position: fixed;
  inset: 0;
  z-index: 200;
  display: none;
  background: rgba(26, 29, 46, 0.4);
  opacity: 0;
  transition: opacity 0.3s ease;
}

.mobile-menu--open {
  display: block;
  opacity: 1;
}

.mobile-menu__panel {
  position: absolute;
  top: 0;
  right: 0;
  width: min(320px, 80vw);
  height: 100%;
  background: var(--color-paper);
  padding: 24px;
  transform: translateX(100%);
  transition: transform 0.3s ease;
  box-shadow: -8px 0 40px rgba(0, 0, 0, 0.1);
}

.mobile-menu--open .mobile-menu__panel {
  transform: translateX(0);
}

.mobile-menu__close {
  position: absolute;
  top: 16px;
  right: 16px;
  width: 40px;
  height: 40px;
  border: none;
  border-radius: var(--radius-xs);
  background: rgba(59, 130, 246, 0.08);
  color: var(--color-text);
  font-size: 1.25rem;
  cursor: pointer;
}

.mobile-menu__nav {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-top: 64px;
}

.mobile-menu__link {
  padding: 14px 16px;
  border-radius: var(--radius-xs);
  color: var(--color-text);
  text-decoration: none;
  font-weight: 600;
  transition: background 0.2s ease;
}

.mobile-menu__link:hover {
  background: rgba(59, 130, 246, 0.08);
}

.mobile-menu__link--cta {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  color: #fff;
  text-align: center;
  margin-top: 8px;
}

/* Hero */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.hero-site-frame {
  position: absolute;
  inset: 0;
  z-index: 0;
  overflow: hidden;
  background: var(--color-bg);
  pointer-events: none;
}

.hero-iframe {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 100vw;
  height: 100vh;
  transform: translate(-50%, -50%) scale(0.82);
  transform-origin: center center;
  border: none;
  background: var(--color-bg);
  pointer-events: auto;
  box-shadow: 0 24px 80px rgba(37, 99, 235, 0.15);
  border-radius: 6px;
}

.hero-scroll-indicator {
  position: absolute;
  bottom: 40px;
  left: 50%;
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  color: var(--color-primary);
  font-size: 0.85rem;
  font-weight: 600;
  pointer-events: none;
  text-shadow: 0 1px 4px rgba(255, 255, 255, 0.9);
  animation: bounceIndicator 2s infinite;
}

.hero-scroll-indicator i {
  font-size: 1.2rem;
}

@keyframes bounceIndicator {
  0%, 20%, 50%, 80%, 100% { transform: translateX(-50%) translateY(0); }
  40% { transform: translateX(-50%) translateY(-12px); }
  60% { transform: translateX(-50%) translateY(-6px); }
}

/* Intro */
.section--intro {
  padding-top: 100px;
  padding-bottom: 40px;
}

.intro-content {
  max-width: 760px;
  margin: 0 auto;
  text-align: center;
}

.intro-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 18px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.9);
  border: 1px solid var(--color-border);
  color: var(--color-primary);
  font-weight: 600;
  font-size: 0.9rem;
  margin-bottom: 28px;
  box-shadow: var(--shadow-sm);
}

.intro-title {
  font-size: clamp(2.6rem, 6vw, 4.6rem);
  font-weight: 900;
  line-height: 1.08;
  letter-spacing: -0.03em;
  margin-bottom: 24px;
}

.intro-desc {
  font-size: 1.15rem;
  color: var(--color-text-secondary);
  max-width: 620px;
  margin: 0 auto 36px;
  line-height: 1.8;
}

.intro-actions {
  display: flex;
  justify-content: center;
  gap: 16px;
  margin-bottom: 56px;
  flex-wrap: wrap;
}

.intro-stats {
  display: flex;
  justify-content: center;
  gap: 56px;
}

.intro-stat {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.intro-stat__num {
  font-size: 2.2rem;
  font-weight: 800;
  color: var(--color-primary);
  line-height: 1;
}

.intro-stat__label {
  font-size: 0.92rem;
  color: var(--color-text-secondary);
  margin-top: 8px;
}

/* Sections */
.section {
  padding: 100px 0;
}

.section-header {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 60px;
}

.section-tag {
  display: inline-block;
  padding: 6px 14px;
  border-radius: 999px;
  background: rgba(59, 130, 246, 0.10);
  color: var(--color-primary);
  font-weight: 700;
  font-size: 0.85rem;
  margin-bottom: 16px;
}

.section-tag--light {
  background: rgba(255, 255, 255, 0.2);
  color: #fff;
}

.section-title {
  font-size: clamp(1.9rem, 4vw, 2.8rem);
  font-weight: 800;
  margin-bottom: 16px;
  letter-spacing: -0.02em;
}

.section-subtitle {
  font-size: 1.1rem;
  color: var(--color-text-secondary);
  line-height: 1.7;
}

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

.feature-card {
  background: var(--color-paper);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 32px;
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}

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

.feature-card__icon {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  color: #fff;
  margin-bottom: 20px;
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
  box-shadow: 0 8px 20px rgba(59, 130, 246, 0.25);
}

.feature-card__title {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 10px;
}

.feature-card__desc {
  font-size: 0.95rem;
  color: var(--color-text-secondary);
  line-height: 1.65;
}

/* Deployment */
.deploy-card {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
  border-radius: var(--radius);
  padding: 56px;
  color: #fff;
  box-shadow: var(--shadow-lg);
  overflow: hidden;
  position: relative;
}

.deploy-card::before {
  content: "";
  position: absolute;
  top: -50%;
  right: -20%;
  width: 60%;
  height: 200%;
  background: rgba(255, 255, 255, 0.08);
  transform: rotate(15deg);
  pointer-events: none;
}

.deploy-card__title {
  font-size: 2rem;
  font-weight: 800;
  margin-bottom: 16px;
}

.deploy-card__desc {
  font-size: 1.05rem;
  opacity: 0.92;
  line-height: 1.7;
  margin-bottom: 28px;
}

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

.deploy-list li {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 500;
}

.deploy-list i {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  flex-shrink: 0;
}

.deploy-flow {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 20px;
}

.deploy-step {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  font-weight: 600;
}

.deploy-step__icon {
  width: 72px;
  height: 72px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.18);
  backdrop-filter: blur(8px);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.6rem;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.1);
}

.deploy-arrow {
  font-size: 1.4rem;
  opacity: 0.7;
}

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

.admin-card {
  background: var(--color-paper);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 24px;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

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

.admin-card__icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-xs);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  color: #fff;
  margin-bottom: 16px;
}

.admin-card__title {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.admin-card__desc {
  font-size: 0.88rem;
  color: var(--color-text-secondary);
  line-height: 1.55;
}

/* AI */
.ai-layout {
  display: flex;
  justify-content: center;
}

.ai-content {
  max-width: 840px;
  width: 100%;
}

.ai-content .section-title,
.ai-content .section-subtitle {
  text-align: center;
}

.ai-content .section-subtitle {
  margin-bottom: 36px;
}

.ai-features {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.ai-feature {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 16px;
  padding: 28px 20px;
  background: var(--color-paper);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
}

.ai-feature__icon {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  color: #fff;
  background: linear-gradient(135deg, var(--color-secondary) 0%, var(--color-primary) 100%);
  flex-shrink: 0;
  box-shadow: 0 8px 20px rgba(59, 130, 246, 0.25);
}

.ai-feature__text {
  display: flex;
  flex-direction: column;
}

.ai-feature__text strong {
  font-size: 1.05rem;
  margin-bottom: 6px;
}

.ai-feature__text span {
  font-size: 0.92rem;
  color: var(--color-text-secondary);
  line-height: 1.55;
}

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

.custom-card {
  background: var(--color-paper);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 32px;
  text-align: center;
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}

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

.custom-card__icon {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.6rem;
  color: #fff;
  margin: 0 auto 20px;
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
  box-shadow: 0 10px 28px rgba(59, 130, 246, 0.25);
}

.custom-card__title {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 10px;
}

.custom-card__desc {
  font-size: 0.95rem;
  color: var(--color-text-secondary);
  line-height: 1.6;
}

/* Tech */
.tech-grid {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 16px;
}

.tech-chip {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 12px 20px;
  border-radius: 999px;
  background: var(--color-paper);
  border: 1px solid var(--color-border);
  font-weight: 600;
  font-size: 0.95rem;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.tech-chip:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-sm);
}

.tech-chip i {
  font-size: 1.1rem;
  color: var(--color-primary);
}

/* Download */
.section--download {
  padding-bottom: 120px;
}

.download-card {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
  border-radius: var(--radius);
  padding: 72px 56px;
  text-align: center;
  color: #fff;
  box-shadow: var(--shadow-lg);
  position: relative;
  overflow: hidden;
}

.download-card::before {
  content: "";
  position: absolute;
  top: -50%;
  left: -20%;
  width: 60%;
  height: 200%;
  background: rgba(255, 255, 255, 0.08);
  transform: rotate(-15deg);
  pointer-events: none;
}

.download-card__content {
  position: relative;
  z-index: 1;
}

.download-card__title {
  font-size: 2.2rem;
  font-weight: 800;
  margin-bottom: 16px;
}

.download-card__desc {
  font-size: 1.1rem;
  opacity: 0.92;
  max-width: 640px;
  margin: 0 auto 36px;
  line-height: 1.7;
}

.download-actions {
  display: flex;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 20px;
}

.download-actions .btn--primary {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  color: #fff;
  box-shadow: 0 8px 24px rgba(37, 99, 235, 0.35);
}

.download-actions .btn--primary:hover {
  background: linear-gradient(135deg, var(--color-primary-light) 0%, var(--color-primary) 100%);
  color: #fff;
  box-shadow: 0 12px 32px rgba(37, 99, 235, 0.45);
}

.download-actions .btn--outline {
  border-color: rgba(255, 255, 255, 0.5);
  color: #fff;
}

.download-actions .btn--outline:hover {
  background: rgba(255, 255, 255, 0.15);
  border-color: #fff;
  color: #fff;
}

.download-actions .icon-gitee-badge {
  filter: brightness(0) invert(1);
}

.download-version {
  font-size: 0.9rem;
  opacity: 0.8;
}

/* Footer */
.site-footer {
  border-top: 1px solid var(--color-border);
  background: rgba(255, 255, 255, 0.5);
  backdrop-filter: blur(8px);
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 28px 24px;
  gap: 16px;
  flex-wrap: wrap;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
}

.footer-logo {
  width: 32px;
  height: 32px;
  border-radius: 8px;
}

.footer-copy {
  font-size: 0.9rem;
  color: var(--color-text-secondary);
}

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

.footer-links a {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(59, 130, 246, 0.08);
  color: var(--color-text);
  font-size: 1.2rem;
  text-decoration: none;
  transition: all 0.2s ease;
}

.footer-links a:hover {
  background: var(--color-primary);
  color: #fff;
  transform: translateY(-2px);
}

.footer-links a:hover .icon-gitee-badge {
  filter: brightness(0) invert(1);
}

/* Back to top */
.back-to-top {
  position: fixed;
  right: 24px;
  bottom: 24px;
  width: 48px;
  height: 48px;
  border: none;
  border-radius: 50%;
  background: var(--color-paper);
  color: var(--color-primary);
  box-shadow: var(--shadow-md);
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transform: translateY(12px);
  transition: all 0.3s ease;
  z-index: 90;
}

.back-to-top--visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.back-to-top:hover {
  background: var(--color-primary);
  color: #fff;
}

/* Reveal animations */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

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

@media (scripting: none) {
  .reveal {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Responsive */
@media (max-width: 1024px) {
  .deploy-card {
    grid-template-columns: 1fr;
  }

  .deploy-card__visual {
    order: -1;
  }

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

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

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

@media (max-width: 768px) {
  :root {
    --header-height: 64px;
  }

  .main-nav {
    display: none;
  }

  .menu-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
  }

  .hero {
    min-height: 100vh;
  }

  .hero-scroll-indicator {
    bottom: 24px;
  }

  .section--intro {
    padding-top: 64px;
  }

  .intro-title {
    font-size: 2.2rem;
  }

  .intro-desc {
    font-size: 1rem;
  }

  .intro-actions {
    flex-direction: column;
    align-items: stretch;
  }

  .intro-stats {
    gap: 24px;
  }

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

  .section {
    padding: 64px 0;
  }

  .deploy-card,
  .download-card {
    padding: 36px 24px;
  }

  .deploy-flow {
    flex-direction: column;
    gap: 16px;
  }

  .deploy-arrow {
    transform: rotate(90deg);
  }

  .admin-grid,
  .feature-grid,
  .custom-grid {
    grid-template-columns: 1fr;
  }

  .download-actions {
    flex-direction: column;
    align-items: stretch;
  }

  .footer-inner {
    flex-direction: column;
    text-align: center;
  }
}

@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;
  }
}