/* =========================================================
   通用组件
   ========================================================= */

/* ===== Navbar ===== */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  padding: 18px 0;
  transition: all .35s var(--ease-out);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  background: rgba(5, 8, 17, 0.55);
  border-bottom: 1px solid transparent;
}
.nav.scrolled {
  padding: 12px 0;
  background: rgba(5, 8, 17, 0.85);
  border-bottom: 1px solid var(--hairline);
}

.nav-inner {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 32px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-family: var(--font-mono);
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--ink);
  flex-shrink: 0;
}
.brand-mark {
  width: 36px; height: 36px;
  position: relative;
  display: grid; place-items: center;
}
.brand-mark svg { width: 100%; height: 100%; }
.brand-name {
  display: flex;
  flex-direction: column;
  line-height: 1;
}
.brand-name-en {
  font-size: 14px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}
.brand-name-cn {
  font-family: var(--font-han);
  font-weight: 600;
  font-size: 11px;
  color: var(--ink-mute);
  margin-top: 4px;
  letter-spacing: 0.05em;
}

.nav-links {
  display: flex;
  gap: 4px;
  align-items: center;
}
.nav-links a {
  font-family: var(--font-han);
  font-size: 14px;
  font-weight: 500;
  padding: 10px 16px;
  border-radius: var(--r-2);
  color: var(--ink-dim);
  transition: all .25s var(--ease-out);
  position: relative;
}
.nav-links a:hover { color: var(--ink); background: var(--bg-elev-1); }
.nav-links a.active {
  color: var(--signal);
  background: var(--signal-soft);
}
.nav-links a.active::after {
  content: "";
  position: absolute;
  left: 16px; right: 16px;
  bottom: 4px;
  height: 1px;
  background: var(--signal);
  box-shadow: 0 0 8px var(--signal);
}

.nav-cta {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 18px;
  border-radius: var(--r-full);
  background: var(--signal);
  color: var(--void);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  transition: all .25s var(--ease-out);
  box-shadow: 0 8px 24px -8px var(--signal-glow);
}
.nav-cta:hover { transform: translateY(-1px); box-shadow: 0 12px 32px -8px var(--signal-glow); }

.nav-burger {
  display: none;
  width: 40px; height: 40px;
  border-radius: var(--r-2);
  background: var(--bg-elev-1);
  border: 1px solid var(--hairline);
  align-items: center;
  justify-content: center;
}
.nav-burger span {
  display: block;
  width: 18px; height: 1px;
  background: var(--ink);
  position: relative;
}
.nav-burger span::before,
.nav-burger span::after {
  content: "";
  position: absolute;
  left: 0; width: 18px; height: 1px;
  background: var(--ink);
}
.nav-burger span::before { top: -6px; }
.nav-burger span::after  { top: 6px; }

@media (max-width: 960px) {
  .nav-links, .nav-cta { display: none; }
  .nav-burger { display: inline-flex; }
}

/* —— 移动端抽屉 —— */
.mobile-drawer {
  position: fixed;
  inset: 0;
  background: rgba(3, 6, 14, 0.96);
  backdrop-filter: blur(20px);
  z-index: 99;
  padding: 100px 32px 32px;
  transform: translateX(100%);
  transition: transform .35s var(--ease-out);
}
.mobile-drawer.open { transform: translateX(0); }
.mobile-drawer a {
  display: block;
  font-family: var(--font-han);
  font-size: 22px;
  font-weight: 600;
  padding: 18px 0;
  border-bottom: 1px solid var(--hairline);
  color: var(--ink);
}

/* ===== Button ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 14px 26px;
  border-radius: var(--r-full);
  font-family: var(--font-han);
  font-weight: 600;
  font-size: 14px;
  letter-spacing: 0.02em;
  transition: all .25s var(--ease-out);
  cursor: pointer;
  white-space: nowrap;
  position: relative;
  overflow: hidden;
}
.btn-primary {
  background: var(--signal);
  color: var(--void);
  box-shadow: 0 12px 32px -10px var(--signal-glow);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 16px 40px -10px var(--signal-glow);
}
.btn-primary::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(110deg, transparent 30%, rgba(255,255,255,0.35) 50%, transparent 70%);
  transform: translateX(-100%);
  transition: transform .8s var(--ease-out);
}
.btn-primary:hover::after { transform: translateX(100%); }

.btn-ghost {
  background: transparent;
  color: var(--ink);
  border: 1px solid var(--line);
}
.btn-ghost:hover {
  border-color: var(--signal);
  color: var(--signal);
  background: var(--signal-soft);
}

.btn-arrow {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--signal);
  display: inline-flex;
  align-items: center;
  gap: 8px;
  transition: gap .25s var(--ease-out);
}
.btn-arrow:hover { gap: 14px; }
.btn-arrow::after { content: "→"; }

/* ===== Card (通用面板) ===== */
.panel {
  background: linear-gradient(180deg, var(--bg-elev-1) 0%, var(--bg-elev-2) 100%);
  border: 1px solid var(--hairline);
  border-radius: var(--r-4);
  position: relative;
  overflow: hidden;
}
.panel::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 0% 0%, rgba(0,229,255,0.08), transparent 50%);
  pointer-events: none;
}

/* —— 终端框 —— */
.terminal {
  background: var(--bg-elev-1);
  border: 1px solid var(--hairline);
  border-radius: var(--r-3);
  overflow: hidden;
  font-family: var(--font-mono);
  font-size: 13px;
}
.terminal-bar {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 10px 14px;
  border-bottom: 1px solid var(--hairline);
  background: var(--bg-elev-2);
}
.terminal-bar i {
  width: 10px; height: 10px;
  border-radius: 50%;
  background: var(--bg-elev-3);
}
.terminal-bar i.r { background: #FF5F57; }
.terminal-bar i.y { background: #FEBC2E; }
.terminal-bar i.g { background: #28C840; }
.terminal-bar span {
  margin-left: auto;
  font-size: 11px;
  color: var(--ink-mute);
  letter-spacing: 0.1em;
}
.terminal-body {
  padding: 16px 18px;
  color: var(--ink-dim);
  line-height: 1.8;
}
.terminal-body .ln-prompt { color: var(--green); margin-right: 8px; }
.terminal-body .ln-out    { color: var(--ink-dim); }
.terminal-body .ln-key    { color: var(--signal); }
.terminal-body .ln-num    { color: var(--amber); }
.terminal-body .ln-comment{ color: var(--ink-mute); }

/* ===== Footer ===== */
.footer {
  position: relative;
  z-index: 2;
  margin-top: 120px;
  background: linear-gradient(180deg, transparent 0%, rgba(0,229,255,0.04) 100%);
  border-top: 1px solid var(--hairline);
  padding: 80px 0 32px;
}
.footer::before {
  content: "";
  position: absolute;
  top: -1px; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--signal), transparent);
  opacity: 0.5;
}

.footer-inner {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 32px;
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 48px;
}

.footer-brand {
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.footer-brand .brand-mark { width: 44px; height: 44px; }
.footer-tagline {
  font-family: var(--font-han);
  color: var(--ink-dim);
  line-height: 1.7;
  max-width: 280px;
  font-size: 14px;
}

.footer-col h5 {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--ink-mute);
  margin-bottom: 18px;
}
.footer-col ul li {
  margin-bottom: 10px;
}
.footer-col a {
  font-family: var(--font-han);
  font-size: 14px;
  color: var(--ink-dim);
  transition: color .2s;
}
.footer-col a:hover { color: var(--signal); }

.footer-bottom {
  max-width: var(--container);
  margin: 64px auto 0;
  padding: 24px 32px 0;
  border-top: 1px solid var(--hairline);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--ink-mute);
}
.footer-bottom .icp {
  display: flex;
  gap: 18px;
  flex-wrap: wrap;
  align-items: center;
}
.footer-bottom .icp a:hover { color: var(--signal); }
.footer-bottom .icp .gongan {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.footer-bottom .icp .gongan img {
  width: 14px;
  height: 14px;
  display: block;
}

@media (max-width: 960px) {
  .footer-inner { grid-template-columns: 1fr 1fr; gap: 40px; }
}
@media (max-width: 600px) {
  .footer-inner { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; align-items: flex-start; }
}

/* ===== Code badge / spec line ===== */
.spec-line {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-mute);
}
.spec-line .dot {
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--signal);
  box-shadow: 0 0 6px var(--signal);
}
.spec-line .div { color: var(--ink-faint); }

/* ===== Page hero (子页面) ===== */
.page-hero {
  position: relative;
  padding: 180px 0 80px;
  border-bottom: 1px solid var(--hairline);
  overflow: hidden;
}
.page-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(600px 300px at 80% 20%, rgba(0,229,255,0.10), transparent 60%);
  pointer-events: none;
}
.page-hero h1 {
  font-family: var(--font-han);
  font-weight: 900;
  font-size: clamp(36px, 6vw, 72px);
  line-height: 1.05;
  letter-spacing: -0.02em;
}
.page-hero .sub {
  margin-top: 18px;
  font-family: var(--font-han);
  color: var(--ink-dim);
  font-size: 17px;
  max-width: 640px;
  line-height: 1.7;
}
.crumbs {
  display: flex;
  gap: 8px;
  align-items: center;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--ink-mute);
  margin-bottom: 24px;
}
.crumbs a:hover { color: var(--signal); }
.crumbs .sep { color: var(--ink-faint); }