:root {
  --bg: #0b1410;
  --ink: #f4faf6;
  --muted: #9eb5a6;
  --line: #243830;
  --paper: #121f1a;
  --accent: #5ce0b0;
  --accent-glow: #3dffb0;
  --accent-2: #1a3328;
  --signal: #5ce0b0;
  --warn: #e0c48a;
  --warn-2: #2a2418;
  --foot: #070e0b;
  --foot-text: #d7e4d9;
  --banner: #0f1a16;
  --sans: "Noto Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --serif: "Noto Serif SC", "Songti SC", serif;
  --mono: "IBM Plex Mono", ui-monospace, monospace;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.7;
}

.grain,
.grid-fx {
  pointer-events: none;
  position: fixed;
  inset: 0;
  z-index: 0;
}

.grain {
  opacity: 0.08;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.85' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='.55'/%3E%3C/svg%3E");
}

.grid-fx {
  opacity: 0.07;
  background-image:
    linear-gradient(color-mix(in srgb, var(--signal) 35%, transparent) 1px, transparent 1px),
    linear-gradient(90deg, color-mix(in srgb, var(--signal) 35%, transparent) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(ellipse 70% 50% at 50% 0%, #000 20%, transparent 75%);
}

body > *:not(.grain):not(.grid-fx) { position: relative; z-index: 1; }

a { color: var(--signal); text-decoration: none; }
a:hover { color: var(--ink); text-decoration: underline; text-underline-offset: 3px; }
a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--signal);
  outline-offset: 3px;
}

.shell {
  width: min(1120px, calc(100% - 40px));
  margin: 0 auto;
}

.topbar {
  padding: 16px 0;
  border-bottom: 1px solid var(--line);
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: blur(12px);
  position: sticky;
  top: 0;
  z-index: 30;
}

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

.brand {
  display: flex;
  flex-direction: column;
  gap: 2px;
  color: var(--ink);
  text-decoration: none;
  font-weight: 600;
}
.brand:hover { text-decoration: none; }

.wordmark {
  display: inline-flex;
  align-items: center;
  gap: 2px;
  min-height: 34px;
}

.wordmark-glow {
  animation: wm-pulse 1.1s ease-in-out infinite;
  filter: drop-shadow(0 0 10px rgba(92, 224, 176, 0.28));
}

.wm-glow-img {
  display: block;
  height: 40px;
  width: auto;
  max-width: min(220px, 52vw);
}

.wm-lv {
  font-family: var(--mono);
  font-size: 19px;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--ink);
  line-height: 1;
}

.wm-ecg {
  width: 76px;
  height: 28px;
  flex: 0 0 auto;
  margin: 0 -1px;
  overflow: visible;
}

.wm-ecg-line,
.wm-ecg-glow,
.wm-ecg-beat {
  fill: none;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.wm-ecg-glow {
  stroke: var(--signal);
  stroke-width: 3.2;
  opacity: 0.28;
  filter: blur(1.6px);
}

.wm-ecg-line {
  stroke: var(--signal);
  stroke-width: 1.9;
  stroke-dasharray: 32 170;
  animation: ecg-scan 1.65s linear infinite;
}

.wm-ecg-beat {
  stroke: var(--signal);
  stroke-width: 2.4;
  opacity: 0;
  filter: drop-shadow(0 0 4px var(--signal));
  animation: ecg-beat 1.1s ease-in-out infinite;
}

.wm-name {
  font-family: var(--serif);
  font-size: 18px;
  font-weight: 700;
  letter-spacing: 0.04em;
  white-space: nowrap;
  line-height: 1;
  color: var(--ink);
}

.brand-slogan {
  font-size: 10px;
  font-weight: 500;
  color: var(--signal);
  letter-spacing: 0.28em;
  padding-left: 2px;
}

@keyframes wm-pulse {
  0%, 70%, 100% { transform: translateY(0); }
  78% { transform: translateY(-0.5px); }
  86% { transform: translateY(0.5px); }
}

@keyframes ecg-scan {
  from { stroke-dashoffset: 0; }
  to { stroke-dashoffset: -202; }
}

@keyframes ecg-beat {
  0%, 62%, 100% { opacity: 0; stroke-width: 2.2; }
  70%, 82% { opacity: 0.95; stroke-width: 2.8; }
}

.nav { display: flex; gap: 24px; font-size: 14px; font-weight: 500; }
.nav a { color: var(--ink); }
.nav a:hover { color: var(--signal); text-decoration: none; }

.menu-btn {
  display: none;
  height: 40px;
  padding: 0 12px;
  border: 1px solid var(--line);
  background: var(--paper);
  color: var(--ink);
  font: inherit;
  font-size: 14px;
}

/* —— Banner 轮播 —— */
.banner {
  margin-top: 20px;
  margin-bottom: 40px;
}

.banner-stage {
  position: relative;
  min-height: clamp(300px, 48vw, 520px);
  background: var(--banner);
  border: 1px solid #1e332a;
  overflow: hidden;
  isolation: isolate;
}

.banner-stage:has(.slide-promo.is-active) {
  min-height: clamp(280px, 56vw, 560px);
}

.slide {
  position: absolute;
  inset: 0;
  display: grid;
  grid-template-columns: 1.2fr 0.9fr;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.55s ease;
}
.slide.is-active {
  opacity: 1;
  pointer-events: auto;
  z-index: 1;
}
.slide[hidden] { display: grid !important; }

.slide-visual {
  position: relative;
  overflow: hidden;
  background:
    radial-gradient(ellipse 60% 50% at 30% 40%, color-mix(in srgb, var(--signal) 18%, transparent), transparent 70%),
    linear-gradient(160deg, #0c1814 0%, #132820 45%, #0a1210 100%);
}

.slide-brand {
  display: grid;
  place-items: center;
  padding: 28px 24px;
}

.slide-lockup {
  position: relative;
  z-index: 2;
  width: min(92%, 520px);
  height: auto;
  filter: drop-shadow(0 0 18px rgba(92, 224, 176, 0.35));
  animation: lockup-breathe 3.6s ease-in-out infinite;
}

@keyframes lockup-breathe {
  0%, 100% { transform: scale(1); filter: drop-shadow(0 0 14px rgba(92, 224, 176, 0.28)); }
  50% { transform: scale(1.02); filter: drop-shadow(0 0 22px rgba(92, 224, 176, 0.48)); }
}

.slide-visual::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(92, 224, 176, 0.08) 1px, transparent 1px),
    linear-gradient(90deg, rgba(92, 224, 176, 0.08) 1px, transparent 1px);
  background-size: 32px 32px;
  mask-image: linear-gradient(90deg, #000, transparent 90%);
}

.scan {
  position: absolute;
  left: 0;
  right: 0;
  height: 28%;
  background: linear-gradient(180deg, transparent, rgba(92, 224, 176, 0.12), transparent);
  animation: scan-y 4.5s ease-in-out infinite;
  z-index: 1;
}

@keyframes scan-y {
  0%, 100% { top: -20%; }
  50% { top: 85%; }
}

.slide-ecg {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 18%;
  width: 100%;
  height: 36%;
  z-index: 2;
}
.slide-ecg path {
  fill: none;
  stroke: var(--signal);
  stroke-width: 1.6;
  stroke-linecap: round;
  stroke-linejoin: round;
  filter: drop-shadow(0 0 6px rgba(92, 224, 176, 0.55));
  stroke-dasharray: 48 320;
  animation: ecg-scan 2.4s linear infinite;
}

.slide-b .orb {
  position: absolute;
  width: 180px;
  height: 180px;
  border-radius: 50%;
  right: 18%;
  top: 22%;
  border: 1px solid rgba(92, 224, 176, 0.35);
  box-shadow:
    0 0 40px rgba(92, 224, 176, 0.2),
    inset 0 0 30px rgba(92, 224, 176, 0.12);
  animation: orb-pulse 3.2s ease-in-out infinite;
}
.slide-b .orb::after {
  content: "";
  position: absolute;
  inset: 18%;
  border-radius: 50%;
  border: 1px dashed rgba(92, 224, 176, 0.4);
  animation: spin 18s linear infinite;
}

@keyframes orb-pulse {
  0%, 100% { transform: scale(1); opacity: 0.9; }
  50% { transform: scale(1.06); opacity: 1; }
}
@keyframes spin { to { transform: rotate(360deg); } }

.slide-c .nodes {
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(circle at 20% 30%, var(--signal) 0 2px, transparent 3px),
    radial-gradient(circle at 45% 55%, var(--signal) 0 2px, transparent 3px),
    radial-gradient(circle at 70% 28%, var(--signal) 0 2px, transparent 3px),
    radial-gradient(circle at 58% 72%, var(--signal) 0 2px, transparent 3px),
    linear-gradient(115deg, transparent 48%, rgba(92, 224, 176, 0.25) 49%, transparent 51%),
    linear-gradient(35deg, transparent 45%, rgba(92, 224, 176, 0.2) 49%, transparent 53%);
  opacity: 0.7;
  animation: nodes-fade 5s ease-in-out infinite;
}
@keyframes nodes-fade {
  0%, 100% { opacity: 0.45; }
  50% { opacity: 0.85; }
}

.slide-a { /* default ECG slide */ }

.slide-promo {
  grid-template-columns: 1fr;
}

.slide-promo .slide-visual {
  position: absolute;
  inset: 0;
}

.slide-promo .slide-video::before {
  mask-image: none;
  opacity: 0.22;
}

.promo-video {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  background: #070e0b;
}

.promo-poster {
  position: absolute;
  z-index: 1;
  left: 50%;
  top: 42%;
  width: min(58%, 420px);
  height: auto;
  transform: translate(-50%, -50%);
  filter: drop-shadow(0 0 18px rgba(92, 224, 176, 0.35));
  opacity: 0.92;
  transition: opacity 0.45s ease;
  pointer-events: none;
}

.slide-video.is-playing .promo-poster {
  opacity: 0;
}

.slide-promo .slide-copy {
  position: relative;
  z-index: 2;
  max-width: 28em;
  justify-content: flex-end;
  padding: 36px 32px 48px;
  background: linear-gradient(
    90deg,
    color-mix(in srgb, var(--bg) 88%, transparent) 0%,
    color-mix(in srgb, var(--bg) 42%, transparent) 62%,
    transparent 100%
  );
  border-left: 0;
}

.promo-actions {
  margin-top: 4px;
}

.promo-sound {
  height: 36px;
  padding: 0 14px;
  border: 1px solid color-mix(in srgb, var(--signal) 45%, var(--line));
  background: color-mix(in srgb, var(--paper) 78%, transparent);
  color: var(--signal);
  font: inherit;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.08em;
  cursor: pointer;
}

.promo-sound:hover {
  border-color: var(--signal);
  color: var(--ink);
}

.promo-sound[aria-pressed="true"] {
  background: var(--accent-2);
  color: var(--ink);
}

.slide-copy {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 12px;
  padding: 36px 32px;
  color: #e8f2eb;
  background: linear-gradient(180deg, #121f1a, #0d1612);
  border-left: 1px solid #243830;
}

.slide-copy .kicker {
  margin: 0;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--signal);
}

.slide-copy h1 {
  margin: 0;
  font-family: var(--serif);
  font-size: clamp(28px, 4vw, 42px);
  font-weight: 700;
  line-height: 1.2;
  color: var(--ink);
}

.slide-copy p:last-child {
  margin: 0;
  color: var(--muted);
  font-size: 15px;
  max-width: 32em;
}

.banner-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 10px 12px;
  background: #0b1410;
  border: 1px solid #1e332a;
  border-top: 0;
  color: var(--muted);
}

.banner-brand-rail {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  min-width: 0;
}
.banner-glow-mini {
  display: block;
  height: 28px;
  width: auto;
  opacity: 0.92;
  filter: drop-shadow(0 0 8px rgba(92, 224, 176, 0.35));
}
.banner-brand-rail svg {
  width: 100px;
  height: 18px;
}
.banner-brand-rail path {
  fill: none;
  stroke: var(--signal);
  stroke-width: 1.5;
  stroke-linecap: round;
  stroke-linejoin: round;
  filter: drop-shadow(0 0 4px rgba(92, 224, 176, 0.5));
  stroke-dasharray: 24 140;
  animation: ecg-scan 2s linear infinite;
}

.banner-controls {
  display: flex;
  align-items: center;
  gap: 8px;
}

.banner-btn {
  width: 36px;
  height: 32px;
  border: 1px solid var(--line);
  background: var(--paper);
  color: var(--ink);
  font: inherit;
  font-size: 16px;
  line-height: 1;
  cursor: pointer;
}
.banner-btn:hover { border-color: var(--signal); color: var(--signal); }

.banner-dots {
  display: flex;
  gap: 6px;
  padding: 0 4px;
}
.banner-dots button {
  width: 8px;
  height: 8px;
  padding: 0;
  border: 0;
  border-radius: 50%;
  background: #4a6a5a;
  cursor: pointer;
}
.banner-dots button[aria-selected="true"] {
  background: var(--signal);
  box-shadow: 0 0 8px rgba(92, 224, 176, 0.7);
}

.block { padding: 8px 0 40px; }

.block-head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 24px;
  margin-bottom: 8px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--line);
}

.block-head h2,
.panel h2 {
  margin: 0;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.16em;
  color: var(--signal);
}

.block-head p {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
}

.works { list-style: none; margin: 0; padding: 0; }

.work {
  display: grid;
  grid-template-columns: 52px 1fr auto auto;
  gap: 16px;
  align-items: center;
  padding: 22px 4px;
  border-bottom: 1px solid var(--line);
  color: inherit;
  text-decoration: none;
  transition: background 0.2s ease, padding-left 0.2s ease;
}
.work:hover {
  text-decoration: none;
  background: color-mix(in srgb, var(--signal) 8%, transparent);
  padding-left: 6px;
}

.idx {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--signal);
}

.work-title {
  display: block;
  font-size: 20px;
  font-weight: 600;
  color: var(--ink);
}
.work-desc {
  display: block;
  margin-top: 4px;
  color: var(--muted);
  font-size: 14px;
}

.tag {
  font-size: 12px;
  font-weight: 500;
  padding: 4px 9px;
  white-space: nowrap;
}
.tag-ok { color: var(--signal); background: var(--accent-2); border: 1px solid color-mix(in srgb, var(--signal) 35%, transparent); }
.tag-warn { color: var(--warn); background: var(--warn-2); border: 1px solid color-mix(in srgb, var(--signal) 28%, transparent); }
.tag-mute { color: var(--muted); border: 1px solid var(--line); }

.go {
  font-size: 13px;
  font-weight: 600;
  color: var(--ink);
  min-width: 48px;
  text-align: right;
}
.work-primary .go { color: var(--signal); }

.split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0;
  border-top: 1px solid var(--line);
  margin-top: 24px;
}

.panel { padding: 40px 36px 48px 0; }
.panel + .panel {
  padding-left: 36px;
  padding-right: 0;
  border-left: 1px solid var(--line);
}
.panel p { margin: 12px 0 0; color: var(--muted); }
.panel h2 { margin-bottom: 8px; }

.skills {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 18px 0 0;
  padding: 0;
  list-style: none;
}
.skills li {
  font-size: 12px;
  font-weight: 500;
  padding: 4px 10px;
  color: var(--signal);
  background: var(--accent-2);
  border: 1px solid color-mix(in srgb, var(--signal) 30%, transparent);
}

.contact { font-size: 14px; color: var(--muted); }
.contact a { color: var(--signal); }

.site-footer {
  position: relative;
  isolation: isolate;
  margin-top: 12px;
  background: var(--foot);
  color: var(--foot-text);
  padding: 36px 0 72px;
  overflow: hidden;
}

.footer-skyline {
  position: absolute;
  right: 16px;
  bottom: 12px;
  z-index: 0;
  width: min(300px, 40vw);
  height: auto;
  opacity: 0.72;
  pointer-events: none;
  user-select: none;
}

.footer-skyline img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: contain;
  object-position: right bottom;
  filter: drop-shadow(0 0 8px rgba(92, 224, 176, 0.28));
}

.footer-grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1.2fr 1fr 1fr;
  gap: 24px;
  font-size: 13px;
  text-shadow: 0 0 14px color-mix(in srgb, var(--foot) 90%, transparent);
}

.footer-brand {
  margin: 0 0 4px;
  font-family: var(--serif);
  font-size: 20px;
  color: var(--ink);
}
.footer-slogan {
  margin: 0 0 10px;
  font-size: 12px;
  letter-spacing: 0.22em;
  color: var(--signal);
}

.site-footer p { margin: 0 0 6px; color: var(--muted); }
.site-footer a { color: var(--ink); }
.site-footer a:hover { color: var(--signal); }
.footer-legal { text-align: right; }
.footer-legal a { color: var(--signal); }

.chat-btn {
  position: fixed;
  right: 20px;
  bottom: 20px;
  height: 42px;
  padding: 0 16px;
  border: 0;
  background: var(--paper);
  color: var(--ink);
  font: inherit;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.12em;
  cursor: pointer;
  z-index: 40;
  box-shadow: 0 0 0 1px var(--line), 0 0 16px rgba(92, 224, 176, 0.2);
}
.chat-btn:hover { color: var(--signal); }

.chat-panel {
  display: none;
  position: fixed;
  right: 20px;
  bottom: 70px;
  width: min(340px, calc(100vw - 32px));
  background: var(--paper);
  border: 1px solid var(--line);
  color: var(--ink);
  flex-direction: column;
  z-index: 40;
}
.chat-panel.open { display: flex; }

.chat-head {
  padding: 14px 16px 10px;
  border-bottom: 1px solid var(--line);
}
.chat-head strong { display: block; font-size: 14px; color: var(--ink); }
.chat-head span { font-size: 12px; color: var(--signal); }
.chat-body { padding: 14px 16px 16px; font-size: 14px; }
.bubble {
  background: var(--accent-2);
  border: 1px solid color-mix(in srgb, var(--signal) 28%, transparent);
  color: var(--ink);
  padding: 10px 12px;
  margin-bottom: 10px;
}
.hint { margin: 0; font-size: 12px; color: var(--muted); }

@media (prefers-reduced-motion: reduce) {
  .wordmark,
  .wordmark-glow,
  .slide-lockup,
  .wm-ecg-beat { animation: none; }
  .wm-ecg-beat { opacity: 0; }
  .wm-ecg-line,
  .slide-ecg path,
  .banner-brand-rail path,
  .scan,
  .orb,
  .nodes,
  .promo-poster { animation: none !important; }
  .wm-ecg-line,
  .slide-ecg path,
  .banner-brand-rail path { stroke-dasharray: none; }
  .slide { transition: none; }
  .slide-lockup { filter: drop-shadow(0 0 14px rgba(92, 224, 176, 0.28)); }
}

@media (max-width: 800px) {
  .shell { width: calc(100% - 28px); }
  .slide,
  .split,
  .footer-grid,
  .work { grid-template-columns: 1fr; }
  .slide { grid-template-rows: 180px 1fr; }
  .slide-promo {
    grid-template-rows: minmax(210px, 58vw) auto;
  }
  .slide-promo .slide-visual {
    position: relative;
    inset: auto;
  }
  .slide-copy {
    border-left: 0;
    border-top: 1px solid #243830;
    padding: 24px 20px;
  }
  .slide-promo .slide-copy {
    max-width: none;
    justify-content: center;
    padding: 20px 20px 24px;
    background: linear-gradient(180deg, transparent, #0d1612 38%);
    border-top: 0;
  }
  .banner-bar { flex-wrap: wrap; }
  .banner-brand-rail { width: 100%; }
  .panel,
  .panel + .panel {
    padding: 28px 0;
    border-left: 0;
  }
  .panel + .panel { border-top: 1px solid var(--line); }
  .footer-legal { text-align: left; }
  .footer-skyline {
    width: min(210px, 58vw);
    right: 12px;
    bottom: 10px;
    opacity: 0.6;
  }
  .site-footer {
    padding-bottom: 64px;
  }
  .nav { display: none; }
  .nav.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    right: 14px;
    top: 58px;
    min-width: 140px;
    padding: 12px 16px;
    background: var(--paper);
    border: 1px solid var(--line);
    gap: 10px;
  }
  .menu-btn { display: inline-flex; align-items: center; }
  .work { gap: 8px; }
  .idx { order: -1; }
  .tag, .go { justify-self: start; }
}