@import url('https://fonts.googleapis.com/css2?family=Kalam:wght@400;700&family=Patrick+Hand&display=swap');

/* ===== 重置与基础 ===== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --c-primary: #99ffcc;
  --c-accent: #00ff41;
  --c-dark: #001e3c;
  --c-dark-mid: #002a54;
  --c-dark-light: #003870;
  --c-text: #d0f5e8;
  --c-text-muted: #7ac9a8;
  --c-surface: #002240;
  --c-card: #001a33;
  --nav-w: 220px;
  --font-main: 'Kalam', 'Patrick Hand', cursive, system-ui, sans-serif;
  --transition: 0.3s ease;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-main);
  background-color: var(--c-dark);
  color: var(--c-text);
  line-height: 1.7;
  min-height: 100vh;
  overflow-x: hidden;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

a {
  color: var(--c-primary);
  text-decoration: none;
  transition: color var(--transition);
}

a:hover, a:focus-visible {
  color: var(--c-accent);
  outline: 2px solid var(--c-accent);
  outline-offset: 2px;
}

/* ===== 页面骨架 ===== */
.page-shell {
  display: flex;
  min-height: 100vh;
}

/* ===== 左侧固定导航 ===== */
.sidenav {
  position: fixed;
  top: 0;
  left: 0;
  width: var(--nav-w);
  height: 100vh;
  background: var(--c-card);
  border-right: 1px solid rgba(153, 255, 204, 0.12);
  display: flex;
  flex-direction: column;
  align-items: stretch;
  z-index: 100;
  overflow-y: auto;
  padding: 0 0 1rem;
}

.sidenav-brand {
  padding: 1.5rem 1rem 1rem;
  border-bottom: 1px solid rgba(153, 255, 204, 0.1);
  display: flex;
  justify-content: center;
}

.brand-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--c-primary), var(--c-accent));
  overflow: hidden;
  transition: transform var(--transition), box-shadow var(--transition);
}

.brand-link:hover {
  transform: scale(1.08);
  box-shadow: 0 0 18px rgba(0, 255, 65, 0.5);
  outline: none;
}

.brand-icon {
  width: 40px;
  height: 40px;
  object-fit: cover;
  border-radius: 50%;
}

.brand-text-icon {
  font-family: var(--font-main);
  font-weight: 700;
  font-size: 1.2rem;
  color: var(--c-dark);
  letter-spacing: -0.02em;
}

.sidenav-links {
  flex: 1;
  padding: 1.2rem 0;
  display: flex;
  flex-direction: column;
}

.nav-link {
  display: flex;
  align-items: center;
  padding: 0.75rem 1.25rem;
  font-size: 0.97rem;
  font-family: var(--font-main);
  color: var(--c-text-muted);
  border-left: 3px solid transparent;
  transition: color var(--transition), border-color var(--transition), background var(--transition);
  min-height: 44px;
}

.nav-link:hover, .nav-link:focus-visible {
  color: var(--c-accent);
  border-left-color: var(--c-accent);
  background: rgba(0, 255, 65, 0.06);
  outline: none;
}

.sidenav-contact {
  padding: 1rem;
  display: flex;
  justify-content: center;
}

.contact-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: rgba(153, 255, 204, 0.1);
  color: var(--c-primary);
  font-size: 1.3rem;
  transition: background var(--transition), transform var(--transition);
}

.contact-btn:hover {
  background: rgba(0, 255, 65, 0.2);
  transform: scale(1.1);
  color: var(--c-accent);
  outline: none;
}

/* ===== 主内容区 ===== */
.content-wrap {
  margin-left: var(--nav-w);
  flex: 1;
  display: flex;
  flex-direction: column;
  min-width: 0;
}

/* ===== Hero ===== */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  background: radial-gradient(ellipse at 70% 40%, rgba(153,255,204,0.07) 0%, transparent 60%),
              radial-gradient(ellipse at 20% 80%, rgba(0,255,65,0.05) 0%, transparent 50%),
              var(--c-dark);
  position: relative;
  overflow: hidden;
  scroll-margin-top: 0;
}

.hero-inner {
  width: 100%;
  max-width: 1100px;
  margin: 0 auto;
  padding: 4rem 2rem;
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 2rem;
  position: relative;
}

.hero-deco {
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 320px;
  height: 320px;
  pointer-events: none;
}

.blob-svg {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  animation: breathe 8s ease-in-out infinite;
}

.cell-svg {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 120px;
  height: 120px;
}

@keyframes breathe {
  0%, 100% { transform: scale(1) rotate(0deg); }
  50% { transform: scale(1.06) rotate(3deg); }
}

.hero-text {
  max-width: 520px;
  text-align: right;
  position: relative;
  z-index: 2;
}

.hero-eyebrow {
  font-size: 0.9rem;
  color: var(--c-accent);
  letter-spacing: 0.12em;
  margin-bottom: 0.6rem;
  font-family: var(--font-main);
}

.hero-h1 {
  font-family: var(--font-main);
  font-size: clamp(2rem, 5vw, 3.2rem);
  font-weight: 700;
  color: var(--c-primary);
  line-height: 1.25;
  margin-bottom: 1rem;
  text-shadow: 0 0 30px rgba(153, 255, 204, 0.3);
}

.hero-sub {
  font-size: 1.05rem;
  color: var(--c-text-muted);
  line-height: 1.7;
  margin-bottom: 1.8rem;
}

.hero-cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.85rem 2.2rem;
  background: linear-gradient(135deg, var(--c-accent), var(--c-primary));
  color: var(--c-dark);
  font-family: var(--font-main);
  font-weight: 700;
  font-size: 1.05rem;
  border-radius: 2px;
  transition: transform var(--transition), box-shadow var(--transition);
  min-height: 48px;
}

.hero-cta:hover, .hero-cta:focus-visible {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0, 255, 65, 0.4);
  color: var(--c-dark);
  outline: 2px solid var(--c-dark);
}

/* ===== 正文 + 侧边栏布局 ===== */
.body-grid {
  display: grid;
  grid-template-columns: 1fr 260px;
  gap: 0;
  max-width: 1200px;
  margin: 0 auto;
  width: 100%;
  padding: 3rem 2rem;
  align-items: start;
  position: relative;
  z-index: 1;
}

.body-grid::before {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  pointer-events: none;
  z-index: 0;
  background:
    radial-gradient(ellipse at 80% 20%, rgba(153,255,204,0.04) 0%, transparent 50%),
    radial-gradient(ellipse at 10% 70%, rgba(0,255,65,0.03) 0%, transparent 40%);
}

/* ===== main > section > div ===== */
.main-area {
  min-width: 0;
  position: relative;
  z-index: 1;
}

.main-area section {
  display: block;
}

.content-section {
  display: block;
}

/* 正文内部样式 */
.content-section h2,
.main-area h2 {
  font-family: var(--font-main);
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--c-primary);
  margin: 2.5rem 0 1rem;
  padding-bottom: 0.4rem;
  border-bottom: 1px solid rgba(153, 255, 204, 0.15);
}

.content-section h2 > span,
.main-area h2 > span {
  display: inline;
}

.content-section h3,
.main-area h3 {
  font-family: var(--font-main);
  font-size: 1.25rem;
  color: var(--c-accent);
  margin: 2rem 0 0.7rem;
}

.content-section h3 > span,
.main-area h3 > span {
  display: inline;
}

.content-section p,
.main-area p {
  font-size: 1rem;
  line-height: 1.8;
  color: var(--c-text);
  margin-bottom: 1rem;
}

.content-section a,
.main-area a {
  color: var(--c-primary);
  border-bottom: 1px dotted rgba(153, 255, 204, 0.4);
  transition: color var(--transition), border-color var(--transition);
}

.content-section a:hover,
.main-area a:hover {
  color: var(--c-accent);
  border-bottom-color: var(--c-accent);
}

.content-section ul,
.content-section ol,
.main-area ul,
.main-area ol {
  padding-left: 1.4rem;
  margin-bottom: 1rem;
}

.content-section li,
.main-area li {
  line-height: 1.8;
  margin-bottom: 0.4rem;
  color: var(--c-text);
}

/* div 分隔 */
.content-section div,
.main-area div {
  padding: 2.5rem 0;
  border-bottom: 1px solid rgba(153, 255, 204, 0.07);
  scroll-margin-top: 80px;
}

.content-section div:last-child,
.main-area div:last-child {
  border-bottom: none;
}

/* ===== Aside 侧边栏 ===== */
.sidebar {
  position: sticky;
  top: 1.5rem;
  padding-left: 2rem;
  z-index: 1;
}

.aside-inner {
  background: var(--c-surface);
  border: 1px solid rgba(153, 255, 204, 0.1);
  border-radius: 2px;
  padding: 1.5rem;
}

.aside-title {
  font-family: var(--font-main);
  font-size: 1rem;
  font-weight: 700;
  color: var(--c-primary);
  margin-bottom: 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid rgba(153, 255, 204, 0.15);
}

.aside-title > span {
  display: inline;
}

.aside-nav-links {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
  margin-bottom: 1.5rem;
}

.aside-link {
  display: flex;
  align-items: center;
  padding: 0.5rem 0.75rem;
  font-size: 0.9rem;
  color: var(--c-text-muted);
  border-left: 2px solid transparent;
  transition: color var(--transition), border-color var(--transition), background var(--transition);
  min-height: 40px;
}

.aside-link:hover, .aside-link:focus-visible {
  color: var(--c-accent);
  border-left-color: var(--c-accent);
  background: rgba(0, 255, 65, 0.05);
  outline: none;
}

.aside-badge {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.85rem;
  color: var(--c-accent);
  padding: 0.6rem 0.75rem;
  background: rgba(0, 255, 65, 0.06);
  border-radius: 2px;
}

.badge-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--c-accent);
  display: inline-block;
  flex-shrink: 0;
  animation: pulse-dot 2s ease-in-out infinite;
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(1.3); }
}

/* ===== 页脚：极简，仅 p + small ===== */
.site-footer {
  background: var(--c-card);
  border-top: 1px solid rgba(153, 255, 204, 0.1);
  padding: 3rem 2rem;
  text-align: center;
}

.footer-cta {
  font-family: var(--font-main);
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--c-primary);
  margin-bottom: 1rem;
}

.footer-copy {
  display: block;
  font-size: 0.85rem;
  color: var(--c-text-muted);
  line-height: 1.6;
}

/* ===== 页脚导航区（footer 外） ===== */
.footer-nav-wrap {
  background: var(--c-dark-mid);
  border-top: 1px solid rgba(153, 255, 204, 0.08);
  padding: 2rem;
  margin-left: var(--nav-w);
}

.footer-nav-dl {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1.5rem;
  justify-content: center;
  list-style: none;
}

.footer-nav-dl dt,
.footer-nav-dl dd {
  margin: 0;
}

.footer-nav-a {
  display: inline-flex;
  align-items: center;
  padding: 0.5rem 0.75rem;
  font-size: 0.9rem;
  color: var(--c-text-muted);
  min-height: 40px;
  transition: color var(--transition);
  border-bottom: 1px solid transparent;
}

.footer-nav-a:hover, .footer-nav-a:focus-visible {
  color: var(--c-accent);
  border-bottom-color: var(--c-accent);
  outline: none;
}

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

.reveal.visible {
  opacity: 1;
  transform: none;
}

.stagger-list > * {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

.stagger-list > *.visible {
  opacity: 1;
  transform: none;
}

@media (prefers-reduced-motion: reduce) {
  .reveal, .stagger-list > * {
    opacity: 1;
    transform: none;
    transition: none;
  }
  .blob-svg {
    animation: none;
  }
  .badge-dot {
    animation: none;
  }
}

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
  .body-grid {
    grid-template-columns: 1fr;
  }
  .sidebar {
    padding-left: 0;
    padding-top: 2rem;
    position: static;
  }
}

@media (max-width: 768px) {
  :root {
    --nav-w: 0px;
  }

  .sidenav {
    position: fixed;
    top: auto;
    bottom: 0;
    left: 0;
    right: 0;
    width: 100%;
    height: auto;
    flex-direction: row;
    align-items: center;
    border-right: none;
    border-top: 1px solid rgba(153, 255, 204, 0.15);
    overflow-x: auto;
    overflow-y: visible;
    padding: 0;
    z-index: 200;
  }

  .sidenav-brand {
    padding: 0.5rem;
    border-bottom: none;
    border-right: 1px solid rgba(153, 255, 204, 0.1);
    flex-shrink: 0;
  }

  .sidenav-links {
    flex: 1;
    overflow-x: auto;
    padding: 0;
    flex-direction: row;
  }

  .nav-link {
    padding: 0.75rem 0.8rem;
    border-left: none;
    border-top: 3px solid transparent;
    font-size: 0.82rem;
    white-space: nowrap;
    min-height: 44px;
  }

  .nav-link:hover, .nav-link:focus-visible {
    border-left-color: transparent;
    border-top-color: var(--c-accent);
  }

  .sidenav-contact {
    padding: 0.5rem;
    border-left: 1px solid rgba(153, 255, 204, 0.1);
    flex-shrink: 0;
  }

  .content-wrap {
    margin-left: 0;
    padding-bottom: 64px;
  }

  .footer-nav-wrap {
    margin-left: 0;
    padding-bottom: 80px;
  }

  .hero-inner {
    flex-direction: column;
    justify-content: center;
    align-items: flex-end;
    padding: 2rem 1.25rem 3rem;
  }

  .hero-deco {
    position: relative;
    left: auto;
    top: auto;
    transform: none;
    width: 200px;
    height: 200px;
    align-self: center;
  }

  .hero-text {
    max-width: 100%;
  }

  .body-grid {
    padding: 2rem 1.25rem;
  }
}

@media (max-width: 480px) {
  .hero-h1 {
    font-size: 1.8rem;
  }

  .hero-sub {
    font-size: 0.95rem;
  }

  .content-section h2,
  .main-area h2 {
    font-size: 1.35rem;
  }

  .footer-nav-dl {
    gap: 0.3rem 0.8rem;
  }
}

button[aria-expanded]{min-width:44px;min-height:44px}