:root {
  --font-serif: Georgia, "Times New Roman", "Noto Serif SC", "Songti SC", "SimSun", serif;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
  --font-mono: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  --bg: #fff2a8;
  --bg-soft: #ffe2b7;
  --panel: rgba(255, 255, 255, 0.72);
  --panel-strong: rgba(255, 255, 255, 0.88);
  --text: #3b261f;
  --muted: rgba(59, 38, 31, 0.72);
  --line: rgba(130, 73, 45, 0.18);
  --grape: #8f6cf4;
  --iris: #42b8ff;
  --rose: #ff77a8;
  --orange: #ff7a1a;
  --cyan: #54d690;
  --shadow: 0 10px 22px rgba(199, 94, 22, 0.16);
  --card-shadow: 0 4px 8px rgba(199, 94, 22, 0.12);
  --radius: 8px;
  --image-radius: 22px;
  --image-radius-large: 28px;
  --container: min(1180px, calc(100vw - 48px));
  --ease-out-quart: cubic-bezier(0.25, 1, 0.5, 1);
  --ease-out-quint: cubic-bezier(0.22, 1, 0.36, 1);
  --ease-out-expo: cubic-bezier(0.16, 1, 0.3, 1);
  color-scheme: light;
}

[data-theme="green"] {
  --bg: #dff7ce;
  --bg-soft: #bdeaf6;
  --grape: #ff77a8;
  --iris: #4ca7ff;
  --orange: #ff7a1a;
  --cyan: #33c66f;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  background: #ffe2b7;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font-serif);
  color: var(--text);
  background:
    radial-gradient(circle at 12% 8%, rgba(255, 119, 168, 0.42), transparent 25rem),
    radial-gradient(circle at 82% 10%, rgba(84, 214, 144, 0.4), transparent 22rem),
    radial-gradient(circle at 68% 66%, rgba(66, 184, 255, 0.3), transparent 26rem),
    linear-gradient(180deg, var(--bg), #fff7cf 52%, #ffe2b7);
  overflow-x: hidden;
}

main,
.footer {
  position: relative;
  z-index: 1;
}

body.no-motion .particle-field,
body.no-motion .click-sparks,
body.no-motion .cursor-aura {
  display: none;
}

body::before {
  content: none;
}

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

a {
  color: inherit;
  text-decoration: none;
}

button,
a.button {
  font: inherit;
}

button {
  color: inherit;
}

::selection {
  color: #08080e;
  background: var(--orange);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: min(1220px, calc(100vw - 32px));
  margin: 14px auto 0;
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.72);
  backdrop-filter: blur(18px) saturate(1.15);
  box-shadow: 0 12px 30px rgba(255, 122, 26, 0.12);
}

.brand,
.nav,
.nav-toggle,
.button,
.section-kicker,
.meta,
.beian,
.filter-chip,
.expand-btn,
code {
  font-family: var(--font-sans);
}

.brand {
  padding: 8px 12px;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.nav {
  display: flex;
  gap: 4px;
  align-items: center;
}

.nav a,
.nav-toggle,
.theme-toggle {
  border: 0;
  border-radius: 999px;
  padding: 9px 13px;
  color: var(--muted);
  background: transparent;
  font-size: 0.9rem;
  transition: color 180ms ease, background 180ms ease;
}

.nav a:hover,
.nav-toggle:hover,
.theme-toggle:hover {
  color: var(--text);
  background: rgba(255, 122, 26, 0.12);
}

.nav-toggle,
.theme-toggle {
  display: none;
  cursor: pointer;
}

.theme-toggle {
  display: inline-flex;
  font-family: var(--font-sans);
}

.section,
.footer {
  width: var(--container);
  margin: 0 auto;
  padding: clamp(58px, 7vw, 112px) 0;
}

.section {
  position: relative;
}

.section::after {
  content: none;
}

.hero {
  min-height: calc(100svh - 80px);
  display: grid;
  grid-template-columns: minmax(360px, 0.72fr) minmax(580px, 1.28fr);
  align-items: center;
  gap: clamp(28px, 4vw, 56px);
  padding-top: clamp(52px, 8vw, 106px);
}

.hero-copy {
  max-width: 460px;
}

.section-kicker {
  margin: 0 0 18px;
  color: var(--orange);
  font-size: 0.78rem;
  letter-spacing: 0.04em;
  text-transform: none;
}

h1,
h2,
h3,
p {
  overflow-wrap: anywhere;
}

h1,
h2 {
  margin: 0;
  font-weight: 500;
  text-wrap: balance;
}

h1 {
  max-width: 9ch;
  font-size: clamp(3.25rem, 6.8vw, 5.4rem);
  line-height: 0.94;
  letter-spacing: -0.025em;
}

h2 {
  max-width: 12ch;
  font-size: clamp(2.35rem, 5vw, 5rem);
  line-height: 1.02;
  letter-spacing: -0.018em;
}

h3 {
  margin: 0 0 10px;
  font-size: clamp(1.18rem, 1.5vw, 1.45rem);
  line-height: 1.25;
}

p {
  color: var(--muted);
  font-size: clamp(1rem, 1.2vw, 1.12rem);
  line-height: 1.82;
  text-wrap: pretty;
}

.hero-subtitle {
  margin: 24px 0 0;
  color: var(--text);
  font-size: clamp(1.16rem, 1.55vw, 1.48rem);
  line-height: 1.52;
}

.hero-intro {
  max-width: 39ch;
  margin: 18px 0 0;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 32px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  border-radius: 999px;
  padding: 11px 18px;
  border: 1px solid var(--line);
  cursor: pointer;
  transition: transform 180ms ease, background 180ms ease, border-color 180ms ease;
}

.button:hover {
  transform: translateY(-2px);
}

.button.primary {
  color: #fffaf0;
  background: var(--orange);
  border-color: transparent;
  box-shadow: 0 5px 8px rgba(255, 122, 26, 0.22);
}

.button.ghost {
  color: var(--text);
  background: rgba(255, 255, 255, 0.68);
}

.hero-visual {
  margin: 0;
  perspective: 1000px;
  transform:
    translate3d(var(--hero-parallax-x, 0px), var(--hero-parallax-y, 0px), 0)
    rotateX(var(--hero-tilt-x, 0deg))
    rotateY(var(--hero-tilt-y, 0deg));
  transform-style: preserve-3d;
  transition: transform 520ms var(--ease-out-quint);
}

.hero-visual img,
.hero-visual .media-loop,
.image-frame img,
.image-frame .media-loop,
.wide-image img,
.wide-image .media-loop,
.ability-card img,
.prompt-card img,
.workbench-images img,
.code-card img,
.failure-grid img,
.lab-images img,
.case-card img,
.resource-layout > img,
.footer-image img {
  width: 100%;
  border-radius: var(--image-radius);
  border: 0;
  object-fit: cover;
  background: rgba(255, 255, 255, 0.64);
  box-shadow: var(--shadow);
  transition: transform 420ms ease, border-color 240ms ease, filter 240ms ease;
}

.hero-visual img,
.hero-visual .media-loop {
  aspect-ratio: 16 / 9;
  border-radius: var(--image-radius-large);
  box-shadow: 0 32px 70px rgba(255, 122, 26, 0.22);
}

.media-loop {
  display: block;
}

.hero-title {
  display: grid;
  gap: 0.02em;
}

.title-line {
  display: block;
  clip-path: inset(0 0 0 0);
}

.js .title-line {
  animation: heroLineClip 900ms var(--ease-out-expo) both;
  clip-path: inset(0 0 100% 0);
  filter: blur(12px);
  transform: translate3d(0, 0.72em, 0);
}

.js .title-line:nth-child(2) {
  animation-delay: 160ms;
}

.hero-visual .media-loop {
  animation: heroDepthFloat 7s var(--ease-out-quart) infinite alternate;
  transform: translateZ(24px) scale(1.012);
  will-change: transform, filter;
}

.hero-visual figcaption {
  margin-top: 14px;
  color: var(--muted);
  font-family: var(--font-sans);
  font-size: 0.92rem;
}

.section-heading {
  display: grid;
  gap: 20px;
  max-width: 850px;
  margin-bottom: clamp(30px, 5vw, 62px);
}

.section-heading,
.section-copy {
  position: relative;
  z-index: 1;
}

.section-heading p:last-child,
.section-copy p {
  max-width: 72ch;
}

.split-section {
  display: grid;
  grid-template-columns: minmax(0, 0.92fr) minmax(320px, 0.78fr);
  gap: clamp(32px, 6vw, 78px);
  align-items: start;
}

.image-duo {
  display: grid;
  gap: 20px;
}

.image-frame.tall img {
  aspect-ratio: 4 / 3;
}

.image-frame.tall .media-loop {
  aspect-ratio: 4 / 3;
}

.image-frame.offset {
  width: 74%;
  margin-left: auto;
}

.image-frame.offset img {
  aspect-ratio: 4 / 3;
}

.image-frame.offset .media-loop {
  aspect-ratio: 4 / 3;
}

#what-is-vibe-coding {
  grid-template-columns: minmax(390px, 0.72fr) minmax(560px, 1.28fr);
  gap: clamp(26px, 3vw, 42px);
  align-items: stretch;
}

#what-is-vibe-coding .section-copy {
  display: grid;
  align-content: start;
  gap: clamp(14px, 1.7vw, 22px);
  min-height: 100%;
  padding: clamp(10px, 1.4vw, 18px) 0;
}

#what-is-vibe-coding .section-kicker {
  margin: 0;
}

#what-is-vibe-coding h2 {
  max-width: 8.2ch;
  font-size: clamp(3.05rem, 4.75vw, 4.85rem);
  line-height: 0.98;
}

#what-is-vibe-coding .section-copy p {
  max-width: 35ch;
  margin: 0;
}

#what-is-vibe-coding .section-copy p:not(.section-kicker) {
  padding-top: 14px;
  border-top: 1px solid rgba(130, 73, 45, 0.2);
  color: rgba(59, 38, 31, 0.76);
  font-size: clamp(0.98rem, 1.02vw, 1.05rem);
  line-height: 1.66;
}

.definition-points {
  display: grid;
  gap: 6px;
  padding: 0;
  margin: clamp(6px, 1vw, 12px) 0 0;
  list-style: none;
}

.definition-points li {
  display: grid;
  grid-template-columns: minmax(74px, 0.26fr) minmax(0, 1fr);
  gap: 12px;
  align-items: start;
  padding: 9px 0;
  border-top: 1px solid rgba(130, 73, 45, 0.18);
  color: rgba(59, 38, 31, 0.78);
  font-size: 0.9rem;
  line-height: 1.48;
}

.definition-points span {
  color: var(--orange);
  font-family: var(--font-sans);
  font-weight: 700;
}

#what-is-vibe-coding .image-duo {
  display: grid;
  align-self: stretch;
  align-items: center;
}

#what-is-vibe-coding .image-frame {
  margin: 0;
  width: 100%;
  min-width: 0;
}

#what-is-vibe-coding .image-frame img {
  width: 100%;
  height: auto;
  min-height: clamp(500px, 39vw, 620px);
  aspect-ratio: 4 / 3;
  object-fit: cover;
}

#what-is-vibe-coding .image-frame .media-loop {
  width: 100%;
  height: auto;
  min-height: clamp(500px, 36vw, 580px);
  aspect-ratio: 4 / 3;
  object-fit: cover;
}

.contrast-grid {
  grid-column: 1 / -1;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  margin-top: 24px;
  align-items: stretch;
}

.contrast-grid article,
.agent-grid article,
.directions-grid article,
.experiment-list article,
.resource-columns article {
  min-height: 100%;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
  box-shadow: var(--card-shadow);
}

.wide-image {
  margin: 0 0 28px;
}

.wide-image img {
  aspect-ratio: 16 / 7;
}

.wide-image .media-loop {
  aspect-ratio: 16 / 7;
}

.ability-map-visual,
.agent-stage {
  position: relative;
  overflow: hidden;
}

.map-overlay,
.agent-orbit {
  position: absolute;
  inset: 0;
  pointer-events: none;
  overflow: hidden;
  border-radius: var(--image-radius);
}

.map-paths {
  position: absolute;
  inset: 7% 5%;
  width: 90%;
  height: 86%;
}

.map-path {
  fill: none;
  stroke: rgba(255, 122, 26, 0.82);
  stroke-width: 1.7;
  stroke-linecap: round;
  stroke-dasharray: 132;
  stroke-dashoffset: 132;
  filter: drop-shadow(0 0 8px rgba(255, 122, 26, 0.34));
  opacity: 0.74;
  animation: pathIllumination 3.8s var(--ease-out-quint) infinite;
}

.path-code {
  stroke: rgba(66, 184, 255, 0.82);
  animation-delay: 360ms;
}

.path-qa {
  stroke: rgba(84, 214, 144, 0.82);
  animation-delay: 720ms;
}

.map-node {
  position: absolute;
  left: var(--x);
  top: var(--y);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 46px;
  min-height: 28px;
  border-radius: 999px;
  padding: 5px 10px;
  color: #3b261f;
  background: rgba(255, 255, 255, 0.72);
  font-family: var(--font-sans);
  font-size: 0.78rem;
  font-weight: 700;
  box-shadow: 0 8px 18px rgba(255, 122, 26, 0.16);
  transform: translate3d(-50%, -50%, 0) scale(1);
  transition: opacity 260ms ease, filter 260ms ease, transform 260ms ease, background 260ms ease;
}

.ability-section[data-filter="design"] .path-code,
.ability-section[data-filter="design"] .path-qa,
.ability-section[data-filter="code"] .path-design,
.ability-section[data-filter="code"] .path-qa,
.ability-section[data-filter="qa"] .path-design,
.ability-section[data-filter="qa"] .path-code {
  opacity: 0.12;
  filter: blur(1px);
}

.ability-section[data-filter="design"] .map-node:not(.node-design),
.ability-section[data-filter="code"] .map-node:not(.node-code),
.ability-section[data-filter="qa"] .map-node:not(.node-qa) {
  opacity: 0.26;
  filter: saturate(0.65) blur(0.5px);
  transform: translate3d(-50%, -50%, 0) scale(0.92);
}

.ability-section[data-filter="design"] .node-design,
.ability-section[data-filter="code"] .node-code,
.ability-section[data-filter="qa"] .node-qa {
  background: rgba(255, 255, 255, 0.94);
  transform: translate3d(-50%, -50%, 0) scale(1.08);
}

.filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 0 0 24px;
}

.filter-chip,
.expand-btn {
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 9px 13px;
  background: rgba(255, 255, 255, 0.66);
  color: var(--muted);
  cursor: pointer;
}

.filter-chip.is-active,
.expand-btn:hover {
  color: #fffaf0;
  background: var(--cyan);
  border-color: transparent;
}

.ability-grid,
.prompt-grid,
.case-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 18px;
  align-items: stretch;
}

.ability-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.ability-card,
.prompt-card,
.code-card,
.case-card {
  min-width: 0;
  min-height: 100%;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.82), rgba(255, 245, 216, 0.62));
  box-shadow: var(--card-shadow);
  transition: transform 220ms ease, background 220ms ease;
}

.ability-card,
.code-card,
.case-card {
  display: flex;
  flex-direction: column;
}

.ability-card[hidden] {
  display: none;
}

.ability-card img,
.prompt-card img,
.code-card img,
.case-card img {
  aspect-ratio: 4 / 3;
  margin-bottom: 18px;
}

.ability-card span {
  display: block;
  margin-top: 14px;
  color: var(--orange);
  font-family: var(--font-sans);
  font-size: 0.9rem;
}

.timeline-progress {
  position: sticky;
  top: 88px;
  height: 3px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.08);
  overflow: hidden;
  margin-bottom: 30px;
}

.timeline-progress span {
  display: block;
  width: var(--timeline-progress, 0%);
  height: 100%;
  background: linear-gradient(90deg, var(--grape), var(--orange));
}

.timeline {
  display: grid;
  gap: 26px;
  position: relative;
}

.timeline-item {
  position: relative;
  display: grid;
  grid-template-columns: minmax(220px, 0.46fr) minmax(0, 1fr);
  gap: clamp(20px, 4vw, 48px);
  align-items: center;
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.72);
  box-shadow: var(--card-shadow);
  transition: transform 260ms var(--ease-out-quint), filter 260ms ease, background 260ms ease;
}

.timeline-item::before {
  content: "";
  position: absolute;
  left: -13px;
  top: 50%;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.86);
  box-shadow: 0 0 0 5px rgba(255, 122, 26, 0.12);
  transform: translate3d(-50%, -50%, 0) scale(0.82);
  transition: transform 260ms var(--ease-out-quint), background 260ms ease, box-shadow 260ms ease;
}

.timeline-item.is-current {
  background: rgba(255, 255, 255, 0.86);
  filter: saturate(1.08);
  transform: translate3d(8px, 0, 0);
}

.timeline-item.is-current::before {
  background: var(--orange);
  box-shadow:
    0 0 0 7px rgba(255, 122, 26, 0.16),
    0 0 26px rgba(255, 122, 26, 0.52);
  transform: translate3d(-50%, -50%, 0) scale(1);
}

.timeline-item:nth-child(even) {
  transform: none;
}

.timeline-item img {
  aspect-ratio: 4 / 3;
  border-radius: var(--image-radius);
  object-fit: cover;
}

.prompt-card {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.prompt-details {
  max-height: 0;
  overflow: hidden;
  opacity: 0;
  clip-path: inset(0 0 100% 0 round 8px);
  filter: blur(5px);
  transform: translate3d(0, -10px, 0);
  transition:
    max-height 360ms var(--ease-out-quint),
    opacity 260ms ease,
    clip-path 420ms var(--ease-out-quint),
    filter 300ms ease,
    transform 360ms var(--ease-out-quint);
}

.prompt-card.is-open .prompt-details {
  max-height: 760px;
  opacity: 1;
  clip-path: inset(0 0 0 0 round 8px);
  filter: blur(0);
  transform: translate3d(0, 0, 0);
}

.prompt-card.is-open {
  filter: saturate(1.04);
}

.expand-btn {
  transition: transform 180ms ease, background 180ms ease, color 180ms ease, border-color 180ms ease;
}

.prompt-card.is-open .expand-btn {
  transform: translate3d(0, -1px, 0);
}

pre {
  position: relative;
  max-width: 100%;
  overflow-x: auto;
  margin: 10px 0;
  padding: 14px;
  border-radius: var(--radius);
  border: 1px solid rgba(244, 239, 231, 0.12);
  background: rgba(255, 255, 255, 0.56);
}

code {
  color: rgba(59, 38, 31, 0.92);
  font-size: 0.9rem;
  line-height: 1.65;
  white-space: pre-wrap;
}

.copy-btn {
  position: absolute;
  right: 10px;
  top: 10px;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 6px 10px;
  color: var(--text);
  background: rgba(255, 255, 255, 0.86);
  cursor: pointer;
  font-family: var(--font-sans);
  font-size: 0.78rem;
  overflow: hidden;
}

.copy-btn::after {
  content: "";
  position: absolute;
  inset: 50%;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: rgba(84, 214, 144, 0.34);
  opacity: 0;
  transform: translate3d(-50%, -50%, 0) scale(0);
}

.copy-btn.is-copied::after {
  animation: copyRipple 620ms var(--ease-out-quart);
}

.agent-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 16px;
}

.agent-orbit {
  mix-blend-mode: screen;
}

.orbit-route {
  position: absolute;
  inset: 17% 11%;
  border: 2px solid rgba(255, 255, 255, 0.22);
  border-radius: 50%;
  opacity: 0.62;
  transform: rotate(var(--orbit-rotate, -8deg));
}

.route-b {
  inset: 25% 18%;
  --orbit-rotate: 12deg;
  border-color: rgba(84, 214, 144, 0.22);
}

.orbit-dot {
  position: absolute;
  left: 50%;
  top: 50%;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--dot-color, var(--orange));
  box-shadow:
    0 0 0 8px color-mix(in srgb, var(--dot-color, var(--orange)) 18%, transparent),
    0 0 28px color-mix(in srgb, var(--dot-color, var(--orange)) 54%, transparent);
  offset-path: ellipse(38% 28% at 50% 50%);
  offset-rotate: 0deg;
  animation: orbitFlow 5.8s linear infinite;
}

.dot-b {
  --dot-color: var(--cyan);
  animation-delay: -1.9s;
  offset-path: ellipse(30% 20% at 50% 52%);
}

.dot-c {
  --dot-color: var(--iris);
  animation-delay: -3.7s;
  offset-path: ellipse(42% 25% at 50% 48%);
}

.directions-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.workbench-images {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
  margin-top: 28px;
  align-items: stretch;
}

.workbench-images img {
  aspect-ratio: 4 / 3;
}

.workbench-images img:first-child {
  aspect-ratio: 4 / 3;
}

.code-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(210px, 1fr));
  gap: 16px;
  align-items: stretch;
}

.failure-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
  align-items: stretch;
}

.failure-grid article {
  position: relative;
  min-height: 100%;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 16px;
  background: rgba(255, 255, 255, 0.7);
  box-shadow: var(--card-shadow);
  overflow: hidden;
  transition: transform 220ms var(--ease-out-quint), filter 260ms ease, background 260ms ease;
}

.failure-grid article::before {
  content: "";
  position: absolute;
  left: -12%;
  right: -12%;
  top: var(--scan-y, -20%);
  height: 42px;
  background: linear-gradient(180deg, transparent, rgba(66, 184, 255, 0.18), transparent);
  opacity: 0;
  transform: translate3d(0, 0, 0);
  pointer-events: none;
}

.failure-grid article::after {
  content: "待修复";
  position: absolute;
  right: 14px;
  top: 14px;
  border-radius: 999px;
  padding: 5px 9px;
  color: #fffaf0;
  background: rgba(255, 122, 26, 0.88);
  font-family: var(--font-sans);
  font-size: 0.72rem;
  opacity: 0.9;
  transform: translate3d(0, 0, 0);
}

.failure-section.is-scanning .failure-grid article::before {
  opacity: 1;
  animation: qaScanline 1.8s linear infinite;
}

.failure-section[data-repair-state="after"] .failure-grid article {
  background: rgba(255, 255, 255, 0.82);
  filter: saturate(1.06);
}

.failure-section[data-repair-state="after"] .failure-grid article::after {
  content: "已修复";
  background: rgba(84, 214, 144, 0.9);
}

.repair-toggle {
  display: inline-flex;
  gap: 8px;
  padding: 6px;
  margin: -20px 0 26px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.62);
}

.repair-btn {
  border: 0;
  border-radius: 999px;
  padding: 9px 14px;
  color: var(--muted);
  background: transparent;
  cursor: pointer;
  font-family: var(--font-sans);
  transition: color 180ms ease, background 180ms ease, transform 180ms ease;
}

.repair-btn.is-active {
  color: #fffaf0;
  background: var(--orange);
}

.repair-btn:hover {
  transform: translate3d(0, -1px, 0);
}

.failure-grid img {
  aspect-ratio: 4 / 3;
  margin-bottom: 16px;
}

.lab-layout {
  display: grid;
  grid-template-columns: minmax(400px, 0.82fr) minmax(0, 1.18fr);
  gap: clamp(28px, 4vw, 48px);
  align-items: stretch;
}

.lab-workspace {
  display: grid;
  gap: 14px;
}

.lab-stage {
  min-height: 250px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.66);
  box-shadow: var(--card-shadow);
  overflow: hidden;
}

.demo-surface {
  position: relative;
  min-height: 250px;
  padding: 22px;
  overflow: hidden;
  background:
    radial-gradient(circle at var(--demo-x, 50%) var(--demo-y, 45%), rgba(255, 122, 26, 0.2), transparent 190px),
    linear-gradient(135deg, rgba(255, 255, 255, 0.66), rgba(255, 216, 77, 0.16));
}

.demo-card {
  position: relative;
  z-index: 1;
  width: min(320px, 100%);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 20px;
  background: rgba(255, 255, 255, 0.82);
  box-shadow: var(--card-shadow);
  transform:
    rotateX(var(--demo-tilt-x, 0deg))
    rotateY(var(--demo-tilt-y, 0deg))
    translate3d(0, var(--demo-lift, 0px), 0);
  transition: transform 220ms var(--ease-out-quint), filter 220ms ease;
}

.demo-card::after {
  content: "";
  position: absolute;
  inset: 50%;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: rgba(255, 122, 26, 0.28);
  opacity: 0;
  transform: translate3d(-50%, -50%, 0) scale(0);
  pointer-events: none;
}

.demo-label {
  display: inline-flex;
  margin-bottom: 14px;
  color: var(--orange);
  font-family: var(--font-sans);
  font-size: 0.78rem;
}

.demo-action {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 8px 12px;
  color: #fffaf0;
  background: var(--orange);
  cursor: pointer;
}

.demo-action::after {
  content: "";
  position: absolute;
  inset: 50%;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.46);
  opacity: 0;
  transform: translate3d(-50%, -50%, 0) scale(0);
}

.demo-action.is-rippling::after {
  animation: copyRipple 680ms var(--ease-out-quart);
}

.demo-orb {
  position: absolute;
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: rgba(66, 184, 255, 0.32);
  filter: blur(0.2px);
  animation: labOrbFloat 5s ease-in-out infinite alternate;
}

.orb-a {
  right: 18%;
  top: 16%;
}

.orb-b {
  right: 10%;
  bottom: 14%;
  background: rgba(255, 119, 168, 0.28);
  animation-delay: -2s;
}

.demo-progress {
  position: absolute;
  left: 22px;
  right: 22px;
  bottom: 22px;
  height: 7px;
  border-radius: 999px;
  background: rgba(130, 73, 45, 0.12);
  overflow: hidden;
}

.demo-progress span {
  display: block;
  width: var(--demo-progress, 42%);
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(90deg, var(--orange), var(--cyan));
  transition: width 260ms var(--ease-out-quint);
}

.lab-stage[data-demo-state="tilt"] .demo-card {
  --demo-tilt-x: 5deg;
  --demo-tilt-y: -7deg;
}

.lab-stage[data-demo-state="reveal"] .demo-card {
  clip-path: inset(0 0 0 0 round 8px);
  animation: labCardReveal 900ms var(--ease-out-expo);
}

.lab-stage[data-demo-state="float"] .demo-card {
  animation: heroDepthFloat 4.8s ease-in-out infinite alternate;
}

.lab-stage[data-demo-state="copy"] .demo-action::after,
.lab-stage[data-demo-state="drawer"] .demo-card::after {
  animation: copyRipple 820ms var(--ease-out-quart) infinite;
}

.lab-stage[data-demo-state="drawer"] .demo-card {
  clip-path: inset(0 0 0 0 round 8px);
  transform: translate3d(0, -4px, 0);
}

.lab-stage[data-demo-state="filter"] .demo-card {
  filter: saturate(1.16);
}

.lab-stage[data-demo-state="timeline"] .demo-progress span {
  --demo-progress: 86%;
}

.lab-stage[data-demo-state="theme"] .demo-surface {
  background:
    radial-gradient(circle at var(--demo-x, 50%) var(--demo-y, 45%), rgba(84, 214, 144, 0.24), transparent 190px),
    linear-gradient(135deg, rgba(223, 247, 206, 0.72), rgba(189, 234, 246, 0.46));
}

.lab-stage[data-demo-state="lazy"] .demo-card {
  filter: blur(0);
  animation: labLazyFocus 1.4s var(--ease-out-quint);
}

.lab-images {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  align-self: stretch;
}

.lab-images img {
  aspect-ratio: 1 / 1;
  height: 100%;
}

.experiment-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  align-items: stretch;
}

.experiment-list article {
  cursor: pointer;
  transition: transform 200ms var(--ease-out-quint), background 200ms ease, filter 200ms ease;
}

.experiment-list article:hover,
.experiment-list article.is-active {
  background: rgba(255, 255, 255, 0.88);
  filter: saturate(1.08);
  transform: translate3d(0, -4px, 0);
}

.case-card {
  padding: 16px;
}

.resource-layout {
  display: grid;
  grid-template-columns: minmax(430px, 0.88fr) minmax(0, 1.12fr);
  gap: clamp(28px, 4vw, 48px);
  align-items: stretch;
}

.resource-layout > img {
  aspect-ratio: 16 / 10;
  height: 100%;
}

.resource-columns {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  align-items: stretch;
}

.footer {
  display: grid;
  grid-template-columns: minmax(280px, 0.78fr) minmax(0, 1fr);
  gap: clamp(28px, 5vw, 70px);
  align-items: center;
  padding-bottom: 70px;
}

.footer-image {
  margin: 0;
}

.footer-image img {
  aspect-ratio: 16 / 9;
}

.footer-copy h2 {
  max-width: none;
}

.beian {
  margin: 10px 0 0;
  font-size: 0.92rem;
  line-height: 1.5;
}

.beian a {
  color: color-mix(in srgb, var(--orange) 82%, var(--text));
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 4px;
}

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

.cursor-aura {
  position: fixed;
  left: 0;
  top: 0;
  width: 360px;
  height: 360px;
  pointer-events: none;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255, 122, 26, 0.18), transparent 58%);
  transform: translate3d(-50%, -50%, 0);
  opacity: 0;
  z-index: 4;
  mix-blend-mode: screen;
}

.particle-field,
.click-sparks {
  position: fixed;
  inset: 0;
  pointer-events: none;
  overflow: hidden;
}

.particle-field {
  z-index: 0;
  contain: strict;
}

.particle-canvas {
  position: absolute;
  inset: 0;
  display: block;
  width: 100%;
  height: 100%;
  opacity: 0.94;
  mix-blend-mode: multiply;
}

.click-sparks {
  z-index: 30;
}

.particle {
  position: absolute;
  width: var(--size, 12px);
  height: var(--size, 12px);
  left: var(--x, 50%);
  top: var(--y, 50%);
  border-radius: var(--shape, 50%);
  background: var(--color, var(--orange));
  opacity: var(--opacity, 0.54);
  box-shadow:
    inset -2px -3px 4px rgba(59, 38, 31, 0.12),
    0 8px 16px rgba(255, 122, 26, 0.12);
  transform: translate3d(0, 0, 0) rotate(var(--rotate, 0deg)) scale(var(--scale, 1));
  transform-origin: 50% 50%;
  filter: saturate(1.08);
  will-change: transform, opacity;
  animation: particleDrift var(--duration, 18s) cubic-bezier(0.22, 1, 0.36, 1) infinite alternate;
  animation-delay: var(--delay, 0s);
}

.particle.ring {
  background: transparent;
  border: clamp(2px, 0.22vw, 3px) solid var(--color, var(--rose));
  opacity: var(--opacity, 0.48);
}

.particle.flower {
  border-radius: 45% 55% 50% 50%;
}

.particle.soft {
  filter: blur(0.35px) saturate(1.12);
}

.spark {
  position: fixed;
  left: var(--x);
  top: var(--y);
  width: 10px;
  height: 10px;
  border-radius: 999px;
  background: var(--color);
  box-shadow: 0 6px 14px rgba(255, 122, 26, 0.18);
  animation: sparkPop 720ms ease-out forwards;
}

@keyframes particleDrift {
  0% {
    opacity: calc(var(--opacity, 0.54) * 0.72);
    transform: translate3d(0, 0, 0) rotate(var(--rotate, 0deg)) scale(var(--scale, 1));
  }
  34% {
    opacity: var(--opacity, 0.54);
    transform:
      translate3d(var(--drift-x-a, 22px), var(--drift-y-a, -30px), 0)
      rotate(calc(var(--rotate, 0deg) + 55deg))
      scale(calc(var(--scale, 1) * 1.08));
  }
  68% {
    opacity: calc(var(--opacity, 0.54) * 0.82);
    transform:
      translate3d(var(--drift-x-b, -18px), var(--drift-y-b, 24px), 0)
      rotate(calc(var(--rotate, 0deg) + 118deg))
      scale(calc(var(--scale, 1) * 0.94));
  }
  100% {
    opacity: calc(var(--opacity, 0.54) * 0.9);
    transform:
      translate3d(var(--drift-x-c, 10px), var(--drift-y-c, -14px), 0)
      rotate(calc(var(--rotate, 0deg) + 180deg))
      scale(var(--scale, 1));
  }
}

@keyframes sparkPop {
  0% {
    opacity: 0.9;
    transform: translate3d(-50%, -50%, 0) scale(0.5);
  }
  100% {
    opacity: 0;
    transform: translate3d(calc(-50% + var(--dx)), calc(-50% + var(--dy)), 0) scale(1.4);
  }
}

@keyframes heroLineClip {
  0% {
    clip-path: inset(0 0 100% 0);
    filter: blur(12px);
    transform: translate3d(0, 0.72em, 0);
  }
  100% {
    clip-path: inset(0 0 0 0);
    filter: blur(0);
    transform: translate3d(0, 0, 0);
  }
}

@keyframes heroDepthFloat {
  0% {
    filter: saturate(1.02) brightness(1);
    transform: translate3d(0, 0, 0) scale(1.012);
  }
  100% {
    filter: saturate(1.08) brightness(1.025);
    transform: translate3d(0, -8px, 0) scale(1.024);
  }
}

@keyframes pathIllumination {
  0% {
    stroke-dashoffset: 132;
  }
  45%,
  100% {
    stroke-dashoffset: 0;
  }
}

@keyframes orbitFlow {
  0% {
    offset-distance: 0%;
    opacity: 0.25;
  }
  10%,
  88% {
    opacity: 1;
  }
  100% {
    offset-distance: 100%;
    opacity: 0.25;
  }
}

@keyframes qaScanline {
  0% {
    transform: translate3d(0, -140%, 0);
  }
  100% {
    transform: translate3d(0, 520%, 0);
  }
}

@keyframes copyRipple {
  0% {
    opacity: 0.65;
    transform: translate3d(-50%, -50%, 0) scale(0);
  }
  100% {
    opacity: 0;
    transform: translate3d(-50%, -50%, 0) scale(18);
  }
}

@keyframes labOrbFloat {
  0% {
    transform: translate3d(0, 0, 0) scale(1);
  }
  100% {
    transform: translate3d(-22px, 18px, 0) scale(1.18);
  }
}

@keyframes labCardReveal {
  0% {
    clip-path: inset(0 0 100% 0 round 8px);
    opacity: 0.2;
    transform: translate3d(0, 18px, 0);
  }
  100% {
    clip-path: inset(0 0 0 0 round 8px);
    opacity: 1;
    transform: translate3d(0, 0, 0);
  }
}

@keyframes labLazyFocus {
  0% {
    opacity: 0.52;
    filter: blur(8px) saturate(0.88);
  }
  100% {
    opacity: 1;
    filter: blur(0) saturate(1.04);
  }
}

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

.js .reveal {
  opacity: 0.001;
  transform: translateY(22px);
  transition: opacity 760ms ease, transform 760ms ease;
}

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

.js .hero-visual.reveal,
.js .hero-visual.reveal.is-visible {
  transform:
    translate3d(var(--hero-parallax-x, 0px), var(--hero-parallax-y, 0px), 0)
    rotateX(var(--hero-tilt-x, 0deg))
    rotateY(var(--hero-tilt-y, 0deg));
}

@media (hover: hover) and (pointer: fine) {
  .image-frame:hover img,
  .image-frame:hover .media-loop,
  .wide-image:hover img,
  .wide-image:hover .media-loop,
  .ability-card:hover img,
  .prompt-card:hover img,
  .workbench-images img:hover,
  .code-card:hover img,
  .failure-grid article:hover img,
  .lab-images img:hover,
  .case-card:hover img,
  .resource-layout > img:hover,
  .footer-image:hover img {
    transform: scale(1.025);
    border-color: rgba(255, 122, 26, 0.34);
    filter: saturate(1.08) brightness(1.035);
  }

  .tilt-card:hover,
  .prompt-card:hover,
  .case-card:hover {
    transform: translateY(-6px) rotateX(var(--tilt-x, 0deg)) rotateY(var(--tilt-y, 0deg));
  }

  body.has-pointer .cursor-aura {
    opacity: 1;
  }
}

@media (max-width: 1100px) {
  .code-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .failure-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 900px) {
  .hero,
  .split-section,
  .lab-layout,
  .resource-layout,
  .footer {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: auto;
  }

  #what-is-vibe-coding {
    grid-template-columns: 1fr;
    gap: 28px;
  }

  #what-is-vibe-coding .section-copy {
    padding: 0;
  }

  #what-is-vibe-coding h2 {
    max-width: 9ch;
  }

  #what-is-vibe-coding .section-copy p {
    max-width: 68ch;
  }

  #what-is-vibe-coding .image-duo {
    grid-template-rows: none;
  }

  #what-is-vibe-coding .image-frame img,
  #what-is-vibe-coding .image-frame .media-loop {
    min-height: 0;
    aspect-ratio: 16 / 10;
  }

  .contrast-grid,
  .workbench-images,
  .directions-grid,
  .resource-columns {
    grid-template-columns: 1fr;
  }

  .timeline-item,
  .timeline-item:nth-child(even) {
    grid-template-columns: 1fr;
    transform: none;
  }

  .wide-image img,
  .wide-image .media-loop {
    aspect-ratio: 16 / 10;
  }

  .lab-images img,
  .resource-layout > img {
    height: auto;
  }

  .map-node {
    min-width: 36px;
    min-height: 24px;
    padding: 4px 7px;
    font-size: 0.68rem;
  }

  .agent-orbit {
    opacity: 0.72;
  }

  .hero-visual {
    --hero-parallax-x: 0px !important;
    --hero-parallax-y: 0px !important;
    --hero-tilt-x: 0deg !important;
    --hero-tilt-y: 0deg !important;
  }

}

@media (max-width: 768px) {
  :root {
    --container: min(100vw - 32px, 680px);
  }

  .site-header {
    align-items: flex-start;
    border-radius: 24px;
  }

  .nav-toggle {
    display: inline-flex;
  }

  .nav {
    position: absolute;
    left: 12px;
    right: 12px;
    top: calc(100% + 8px);
    display: none;
    flex-direction: column;
    align-items: stretch;
    padding: 10px;
    border: 1px solid var(--line);
    border-radius: 18px;
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(14px);
  }

  .site-header.nav-open .nav {
    display: flex;
  }

  .nav a,
  .theme-toggle {
    width: 100%;
  }

  .section,
  .footer {
    padding: 58px 0;
  }

  .hero-actions,
  .filter-bar {
    align-items: stretch;
  }

  .hero-actions .button {
    flex: 1 1 180px;
  }

  .code-grid,
  .failure-grid,
  .experiment-list,
  .lab-images {
    grid-template-columns: 1fr;
  }

  .lab-images img,
  .resource-layout > img {
    height: auto;
  }

  .image-frame.offset {
    width: 100%;
  }
}

@media (max-width: 480px) {
  :root {
    --container: calc(100vw - 28px);
  }

  h1 {
    font-size: clamp(3rem, 18vw, 4.15rem);
    max-width: 8ch;
  }

  h2 {
    font-size: clamp(2.2rem, 13vw, 3.2rem);
  }

  .definition-points li {
    grid-template-columns: 1fr;
    gap: 4px;
  }

  .hero-actions .button,
  .back-to-top {
    width: 100%;
  }

  .ability-grid,
  .prompt-grid,
  .case-grid {
    grid-template-columns: 1fr;
  }

  .contrast-grid article,
  .agent-grid article,
  .experiment-list article,
  .resource-columns article,
  .ability-card,
  .prompt-card,
  .code-card,
  .case-card {
    padding: 18px;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
  }

  .cursor-aura {
    display: none;
  }

  .hero-visual,
  .hero-visual .media-loop,
  .timeline-item,
  .prompt-details,
  .orbit-dot,
  .map-path,
  .failure-grid article,
  .demo-card,
  .demo-orb {
    transform: none !important;
    filter: none !important;
    clip-path: none !important;
  }

  .agent-orbit,
  .map-overlay {
    opacity: 0.28;
  }
}