/* ===== 设计令牌 ===== */
:root {
  --bg: #000000;
  --bg-subtle: #050505;
  --bg-card: rgba(255, 255, 255, 0.02);
  --bg-card-hover: rgba(255, 255, 255, 0.04);
  --border: rgba(255, 255, 255, 0.08);
  --border-hover: rgba(56, 189, 248, 0.35);
  --text: #fafafa;
  --text-muted: #a1a1aa;
  --text-dim: #71717a;
  --accent: #38bdf8;
  --accent-bright: #7dd3fc;
  --cyan: #22d3ee;
  --gradient: linear-gradient(135deg, #38bdf8 0%, #22d3ee 100%);
  --font-display: 'Plus Jakarta Sans', 'Noto Sans SC', sans-serif;
  --font-body: 'Inter', 'Noto Sans SC', -apple-system, sans-serif;
  --radius: 14px;
  --radius-lg: 20px;
  --ease: cubic-bezier(0.4, 0, 0.2, 1);
  --header-h: 72px;
}

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

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
}

body {
  font-family: var(--font-body);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  overflow-x: hidden;
}

a { color: inherit; text-decoration: none; }
ul { list-style: none; }

.container {
  width: 100%;
  max-width: 1140px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ===== 背景层 ===== */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 2px;
  width: 0;
  background: var(--gradient);
  z-index: 200;
  transition: width 0.1s linear;
}

.bg-noise {
  position: fixed;
  inset: 0;
  opacity: 0.025;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  pointer-events: none;
  z-index: 0;
}

.bg-grid {
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
  background-size: 80px 80px;
  mask-image: radial-gradient(ellipse 70% 50% at 50% 0%, black 20%, transparent 80%);
  pointer-events: none;
  z-index: 0;
}

.bg-glow {
  position: fixed;
  border-radius: 50%;
  filter: blur(140px);
  pointer-events: none;
  z-index: 0;
}

.bg-glow--1 {
  width: 700px;
  height: 700px;
  background: rgba(56, 189, 248, 0.07);
  top: -300px;
  right: -200px;
}

.bg-glow--2 {
  width: 500px;
  height: 500px;
  background: rgba(34, 211, 238, 0.05);
  bottom: 10%;
  left: -200px;
}

/* ===== 导航 ===== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: var(--header-h);
  display: flex;
  align-items: center;
  transition: background 0.4s var(--ease), border-color 0.4s var(--ease);
}

.header.scrolled {
  background: rgba(0, 0, 0, 0.75);
  backdrop-filter: blur(16px) saturate(180%);
  border-bottom: 1px solid var(--border);
}

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

.logo {
  display: flex;
  align-items: center;
  gap: 11px;
  transition: opacity 0.3s;
}

.logo:hover { opacity: 0.85; }

.logo-icon {
  flex-shrink: 0;
  display: block;
}

.logo-icon--nav { width: 32px; height: 32px; }
.logo-icon--footer { width: 24px; height: 24px; }

.logo-text {
  font-family: var(--font-display);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.02em;
}

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

.nav-links a {
  padding: 8px 14px;
  font-size: 13px;
  font-weight: 500;
  color: var(--text-muted);
  border-radius: 8px;
  transition: color 0.3s, background 0.3s;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--text);
  background: rgba(255, 255, 255, 0.05);
}

.nav-cta {
  color: var(--accent-bright) !important;
  border: 1px solid rgba(56, 189, 248, 0.25) !important;
  background: rgba(56, 189, 248, 0.08) !important;
}

.nav-cta:hover,
.nav-cta.active {
  background: rgba(56, 189, 248, 0.15) !important;
  border-color: rgba(56, 189, 248, 0.4) !important;
}

.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 6px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 6px;
}

.menu-toggle span {
  display: block;
  width: 20px;
  height: 1.5px;
  background: var(--text);
  border-radius: 2px;
  transition: transform 0.3s var(--ease);
}

/* ===== Hero ===== */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: calc(var(--header-h) + 48px) 0 0;
  z-index: 1;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
  padding-bottom: 80px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px 6px 10px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border);
  border-radius: 100px;
  font-size: 12px;
  font-weight: 500;
  color: var(--text-muted);
  letter-spacing: 0.04em;
  margin-bottom: 28px;
}

.badge-dot {
  width: 6px;
  height: 6px;
  background: var(--accent);
  border-radius: 50%;
  box-shadow: 0 0 8px var(--accent);
  animation: pulse 2.5s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}

.hero-title {
  font-family: var(--font-display);
  font-size: clamp(42px, 5.5vw, 68px);
  font-weight: 800;
  line-height: 1.08;
  letter-spacing: -0.04em;
  margin-bottom: 24px;
}

.gradient-text {
  background: var(--gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-desc {
  font-size: 17px;
  color: var(--text-muted);
  max-width: 460px;
  line-height: 1.75;
  margin-bottom: 36px;
}

.hero-actions {
  display: flex;
  gap: 12px;
  margin-bottom: 48px;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 13px 26px;
  font-size: 14px;
  font-weight: 500;
  border-radius: 10px;
  transition: all 0.3s var(--ease);
  cursor: pointer;
}

.btn svg { width: 16px; height: 16px; }

.btn-primary {
  background: var(--text);
  color: var(--bg);
  border: none;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 40px rgba(255, 255, 255, 0.12);
}

.btn-ghost {
  background: transparent;
  color: var(--text-muted);
  border: 1px solid var(--border);
}

.btn-ghost:hover {
  color: var(--text);
  border-color: rgba(255, 255, 255, 0.2);
  background: rgba(255, 255, 255, 0.03);
}

.hero-metrics {
  display: flex;
  gap: 40px;
  padding-top: 32px;
  border-top: 1px solid var(--border);
}

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

.metric-value {
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 700;
  letter-spacing: -0.02em;
}

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

/* Hero 视觉 */
.hero-visual {
  position: relative;
  width: 100%;
  aspect-ratio: 1;
  max-width: 420px;
  margin: 0 auto;
}

.hero-ring {
  position: absolute;
  top: 50%;
  left: 50%;
  border-radius: 50%;
  border: 1px solid rgba(255, 255, 255, 0.06);
  transform: translate(-50%, -50%);
}

.hero-ring--1 {
  width: 100%;
  height: 100%;
  animation: spin 40s linear infinite;
  border-color: rgba(56, 189, 248, 0.12);
}

.hero-ring--2 {
  width: 72%;
  height: 72%;
  animation: spin 30s linear infinite reverse;
  border-color: rgba(255, 255, 255, 0.08);
}

.hero-ring--3 {
  width: 44%;
  height: 44%;
  animation: spin 20s linear infinite;
  border-color: rgba(34, 211, 238, 0.15);
}

@keyframes spin {
  to { transform: translate(-50%, -50%) rotate(360deg); }
}

.hero-core {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 88px;
  height: 88px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border);
  border-radius: 24px;
  backdrop-filter: blur(12px);
  box-shadow: 0 0 60px rgba(56, 189, 248, 0.1);
}

.hero-core-icon {
  width: 48px;
  height: 48px;
}

/* 滚动条带 */
.marquee {
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  padding: 16px 0;
  overflow: hidden;
  mask-image: linear-gradient(90deg, transparent, black 10%, black 90%, transparent);
}

.marquee-track {
  display: flex;
  gap: 48px;
  width: max-content;
  animation: marquee 30s linear infinite;
}

.marquee-track span {
  font-size: 12px;
  font-weight: 500;
  color: var(--text-dim);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  white-space: nowrap;
}

@keyframes marquee {
  to { transform: translateX(-50%); }
}

/* ===== 通用区块 ===== */
.section {
  position: relative;
  padding: 120px 0;
  z-index: 1;
}

.section--alt {
  background: var(--bg-subtle);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.section-header { margin-bottom: 56px; }

.section-header--center {
  text-align: center;
}

.section-header--center .section-desc {
  margin: 16px auto 0;
}

.section-tag {
  display: inline-block;
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--accent);
  margin-bottom: 14px;
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(30px, 3.5vw, 44px);
  font-weight: 800;
  line-height: 1.12;
  letter-spacing: -0.035em;
}

.section-desc {
  margin-top: 14px;
  font-size: 16px;
  color: var(--text-muted);
  max-width: 520px;
  line-height: 1.7;
}

/* ===== Bento 愿景 ===== */
.bento-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}

.bento-card {
  padding: 36px 32px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  transition: all 0.4s var(--ease);
}

.bento-card:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-hover);
  transform: translateY(-3px);
}

.bento-card--wide {
  grid-column: span 2;
}

.bento-num {
  font-family: var(--font-display);
  font-size: 12px;
  font-weight: 700;
  color: var(--accent);
  letter-spacing: 0.1em;
  margin-bottom: 20px;
}

.bento-card h3 {
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 10px;
  letter-spacing: -0.02em;
}

.bento-card p {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.75;
  max-width: 560px;
}

/* ===== 能力卡片 ===== */
.cap-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}

.cap-card {
  padding: 32px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  transition: all 0.4s var(--ease);
}

.cap-card:hover {
  border-color: var(--border-hover);
  background: var(--bg-card-hover);
}

.cap-card-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 24px;
}

.cap-index {
  font-family: var(--font-display);
  font-size: 12px;
  font-weight: 700;
  color: var(--text-dim);
  letter-spacing: 0.08em;
}

.cap-card-top svg {
  width: 20px;
  height: 20px;
  color: var(--accent);
  opacity: 0.7;
}

.cap-card h3 {
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 8px;
  letter-spacing: -0.02em;
}

.cap-card p {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.7;
}

.status-pill {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-top: 40px;
  padding: 10px 20px;
  font-size: 13px;
  color: var(--text-muted);
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border);
  border-radius: 100px;
}

.status-dot {
  width: 7px;
  height: 7px;
  background: var(--cyan);
  border-radius: 50%;
  animation: pulse 2.5s ease-in-out infinite;
}

/* ===== 关于 ===== */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 72px;
  align-items: center;
}

.about-lead {
  font-size: 16px;
  color: var(--text-muted);
  line-height: 1.8;
  margin-bottom: 16px;
}

.about-content p {
  font-size: 15px;
  color: var(--text-muted);
  line-height: 1.8;
  margin-bottom: 12px;
}

.about-content strong {
  color: var(--text);
  font-weight: 500;
}

.about-meta {
  margin-top: 36px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px 20px;
}

.meta-item dt {
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--text-dim);
  margin-bottom: 5px;
}

.meta-item dd {
  font-size: 14px;
  color: var(--text);
}

.terminal {
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.terminal-bar {
  display: flex;
  align-items: center;
  gap: 7px;
  padding: 14px 18px;
  border-bottom: 1px solid var(--border);
}

.terminal-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
}

.terminal-dot--red { background: #ef4444; }
.terminal-dot--yellow { background: #eab308; }
.terminal-dot--green { background: #22c55e; }

.terminal-title {
  margin-left: 6px;
  font-size: 12px;
  color: var(--text-dim);
  font-family: 'SF Mono', 'Consolas', monospace;
}

.terminal-body {
  padding: 28px 24px;
  font-size: 13px;
  line-height: 1.85;
  font-family: 'SF Mono', 'Consolas', monospace;
  overflow-x: auto;
}

.t-kw { color: #c084fc; }
.t-cls { color: #7dd3fc; }
.t-fn { color: #4ade80; }
.t-str { color: #fbbf24; }
.t-num { color: #f472b6; }

/* ===== 联系 ===== */
.section--contact {
  padding-bottom: 140px;
}

.contact-card {
  position: relative;
  text-align: center;
  padding: 72px 48px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 24px;
  overflow: hidden;
}

.contact-glow {
  position: absolute;
  top: -50%;
  left: 50%;
  transform: translateX(-50%);
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(56, 189, 248, 0.12) 0%, transparent 70%);
  pointer-events: none;
}

.contact-card .section-title { margin: 0 0 12px; }

.contact-card p {
  font-size: 16px;
  color: var(--text-muted);
  margin-bottom: 32px;
}

.contact-email {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 12px;
  padding: 16px 32px;
  font-size: 17px;
  font-weight: 500;
  color: var(--text);
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border);
  border-radius: 12px;
  transition: all 0.3s var(--ease);
}

.contact-email svg { width: 20px; height: 20px; color: var(--accent); }

.contact-email:hover {
  border-color: var(--border-hover);
  background: rgba(56, 189, 248, 0.08);
  transform: translateY(-2px);
  box-shadow: 0 16px 48px rgba(56, 189, 248, 0.1);
}

/* ===== 页脚 ===== */
.footer {
  position: relative;
  z-index: 1;
  padding: 40px 0;
  border-top: 1px solid var(--border);
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 32px;
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-display);
  font-size: 14px;
  font-weight: 700;
  margin-bottom: 8px;
}

.footer-name {
  font-size: 12px;
  color: var(--text-dim);
}

.footer-right {
  text-align: right;
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 10px;
}

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

.footer-nav a {
  font-size: 13px;
  color: var(--text-muted);
  transition: color 0.3s;
}

.footer-nav a:hover { color: var(--text); }

.footer-copy,
.footer-icp {
  font-size: 12px;
  color: var(--text-dim);
}

.footer-icp:hover { color: var(--text-muted); }

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

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

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
  .reveal { opacity: 1; transform: none; }
  html { scroll-behavior: auto; }
}

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
  .hero-grid { grid-template-columns: 1fr; gap: 48px; }
  .hero-visual { max-width: 320px; }
  .bento-card--wide { grid-column: span 1; }
  .bento-grid { grid-template-columns: 1fr; }
  .about-grid { grid-template-columns: 1fr; gap: 48px; }
}

@media (max-width: 768px) {
  .nav-links {
    display: none;
    position: fixed;
    top: var(--header-h);
    left: 0;
    right: 0;
    flex-direction: column;
    gap: 4px;
    padding: 16px 20px 20px;
    background: rgba(0, 0, 0, 0.92);
    backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--border);
  }

  .nav-links.open { display: flex; }
  .nav-links a { width: 100%; text-align: center; }
  .menu-toggle { display: flex; }

  .menu-toggle.active span:first-child {
    transform: rotate(45deg) translate(2px, 2px);
  }

  .menu-toggle.active span:last-child {
    transform: rotate(-45deg) translate(2px, -2px);
  }

  .hero-title { font-size: 38px; }
  .hero-actions { flex-direction: column; }
  .hero-metrics { flex-direction: column; gap: 20px; }
  .cap-grid { grid-template-columns: 1fr; }
  .about-meta { grid-template-columns: 1fr; }
  .contact-card { padding: 48px 24px; }

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

  .footer-right { align-items: center; text-align: center; }
}