/* ChatIP Landing Demo — Neo Brutalism + GSAP — V3 Fixed */
:root {
  --bg: #f4f4f0;
  --dark: #121212;
  --border: 3px solid #121212;
  --shadow: 8px 8px 0 #121212;
  --shadow-hover: 14px 14px 0 #121212;
  --c1: #ff00cc;
  --c2: #ff7b54;
  --c3: #ffd500;
  --c4: #b4ff39;
  --c5: #00f0ff;
  --c6: #9b51e0;
  --ease: cubic-bezier(.25, .8, .25, 1)
}

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

html {
  scroll-behavior: auto;
  overflow-x: hidden;
}

body {
  font-family: 'Inter', system-ui, sans-serif;
  background: var(--bg);
  color: var(--dark);
  overflow-x: hidden;
  background-image: linear-gradient(rgba(18, 18, 18, .05) 1px, transparent 1px), linear-gradient(90deg, rgba(18, 18, 18, .05) 1px, transparent 1px);
  background-size: 50px 50px
}

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

button {
  font-family: inherit
}

/* Nav */
#nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 70px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 clamp(16px, 4vw, 50px);
  background: transparent;
  z-index: 100;
  pointer-events: none; /* 整个 nav 穿透点击，只有子元素响应 */
}
#nav > * {
  pointer-events: auto; /* logo 和按钮恢复点击 */
}

.nav-logo {
  font-size: 24px;
  font-weight: 900
}

.logo-c { color: var(--c1); }
.logo-h { color: var(--c3); }
.logo-a { color: var(--c4); }
.logo-t { color: var(--c2); }
.logo-i { color: var(--c5); }
.logo-p { color: var(--c6); }

.nav-links {
  display: flex;
  align-items: center;
  gap: 20px;
  font-size: 14px;
  font-weight: 700
}

.neo-btn-sm {
  padding: 8px 20px;
  font-size: 13px;
  font-weight: 800;
  background: var(--dark);
  color: #fff;
  border: var(--border);
  border-radius: 100px;
  box-shadow: 3px 3px 0 var(--dark)
}

/* Neo Buttons */
.neo-btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 16px 32px;
  font-size: 17px;
  font-weight: 800;
  background: var(--c4);
  border: var(--border);
  border-radius: 100px;
  box-shadow: 6px 6px 0 #121212;
  transition: all .2s;
  text-transform: uppercase;
  letter-spacing: .04em
}

.neo-btn:hover {
  transform: translate(-2px, -2px);
  box-shadow: 8px 8px 0 #121212;
  background: var(--c3)
}

.neo-btn:active {
  transform: translate(3px, 3px);
  box-shadow: 2px 2px 0 #121212
}

.neo-btn-outline {
  background: #fff
}

.neo-btn-outline:hover {
  background: var(--c5)
}

.neo-btn-circle {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  border: var(--border);
  background: #fff;
  font-size: 18px;
  font-weight: 800;
  box-shadow: 4px 4px 0 #121212;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all .2s
}

.neo-btn-circle:hover {
  background: var(--c4);
  transform: translate(-2px, -2px)
}

/* ====== HERO — 垂直居中修复 ====== */
#hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
  padding: 100px 20px 40px;
  z-index: 10
}

#track-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none
}

.bg-track {
  position: absolute;
  font-family: 'Space Grotesk', sans-serif;
  font-weight: 800;
  color: rgba(18, 18, 18, .06);
  white-space: nowrap
}

.mascot {
  position: absolute;
  z-index: 1;
  will-change: transform
}

.m-tv {
  top: 12%;
  left: 8%
}

.m-writer {
  bottom: 10%;
  left: 12%
}

.m-camera {
  top: 16%;
  right: 10%
}

@media(max-width:768px) {
  .mascot svg {
    width: 80px;
    height: 80px
  }
}

#hero-content {
  position: relative;
  z-index: 10;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center
}

#tilt-card {
  perspective: 800px;
  margin-bottom: 50px;
  position: relative;
}

#title-3d {
  display: flex;
  justify-content: center;
  align-items: baseline;
  transform-style: preserve-3d;
  will-change: transform;
  gap: 0;
  white-space: nowrap
}

.hp-char-wrap {
  display: inline-block;
  will-change: transform;
}

.hp-char {
  font-family: 'Outfit', sans-serif;
  font-size: clamp(5rem, 14vw, 11rem);
  font-weight: 900;
  line-height: 0.85;
  text-transform: uppercase;
  -webkit-text-stroke: 4px var(--dark);
  text-shadow: 8px 8px 0px var(--dark);
  display: inline-block;
  cursor: default;
  animation: jumpWave 4s infinite ease-in-out;
  will-change: transform;
  transition: transform 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

/* Freeze all letters on entering the title area */
.hp-title:hover .hp-char {
  animation: none;
}

/* Custom CSS float up and tilt for the hovered letter */
.hp-char-wrap:hover .hp-char {
  transform: translateY(-20px) scale(1.1) rotate(calc(var(--r) * 1deg));
  z-index: 10;
  position: relative;
}

/* Stagger the load animation so they jump in sequence */
.hp-char-wrap:nth-child(1) .hp-char {
  animation-delay: 0.0s;
}

.hp-char-wrap:nth-child(2) .hp-char {
  animation-delay: 0.1s;
}

.hp-char-wrap:nth-child(3) .hp-char {
  animation-delay: 0.2s;
}

.hp-char-wrap:nth-child(4) .hp-char {
  animation-delay: 0.3s;
}

.hp-char-wrap:nth-child(5) .hp-char {
  animation-delay: 0.4s;
}

.hp-char-wrap:nth-child(6) .hp-char {
  animation-delay: 0.5s;
}

@keyframes jumpWave {

  0%,
  20%,
  100% {
    transform: translateY(0) scale(1) rotate(calc(var(--r) * 1deg / 2));
  }

  10% {
    transform: translateY(-30px) scale(1.1) rotate(calc(var(--r) * 1deg));
  }
}

.hp-c {
  color: var(--c1);
}

.hp-h {
  color: var(--c3);
}

.hp-a {
  color: var(--c4);
}

.hp-t {
  color: var(--c2);
}

.hp-i {
  color: var(--c5);
}

.hp-p {
  color: var(--c6);
}

/* Mascot Float Animations */
.mascot-tv {
  animation: floatTV 6s ease-in-out infinite;
}

.mascot-writer {
  animation: floatWriter 8s ease-in-out infinite 1s;
}

.mascot-camera {
  animation: floatCamera 7s ease-in-out infinite 2s;
}

@keyframes floatTV {

  0%,
  100% {
    transform: translateY(0) rotate(0deg);
  }

  50% {
    transform: translateY(-15px) rotate(3deg);
  }
}

@keyframes floatWriter {

  0%,
  100% {
    transform: translateY(0) rotate(0deg);
  }

  50% {
    transform: translateY(-20px) rotate(-4deg);
  }
}

@keyframes floatCamera {

  0%,
  100% {
    transform: translateY(0) rotate(0deg);
  }

  50% {
    transform: translateY(-18px) rotate(4deg);
  }
}

/* Presents tag */
.hp-presents {
  display: inline-block;
  padding: 8px 20px;
  background: var(--c6);
  color: white;
  font-weight: 800;
  border: var(--border);
  border-radius: 100px;
  font-size: clamp(13px, 1.8vw, 15px);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  margin-bottom: 24px;
  box-shadow: 4px 4px 0 var(--dark);
  transform: rotate(-2deg);
  will-change: transform;
}

/* Hero description bubble */
.hp-hero-desc {
  font-size: clamp(1.1rem, 2.2vw, 1.45rem);
  font-weight: 600;
  color: var(--dark);
  max-width: 720px;
  line-height: 1.6;
  margin-bottom: 40px;
  background: white;
  padding: 24px;
  border: var(--border);
  border-radius: 16px;
  box-shadow: 6px 6px 0 var(--dark);
  transform: rotate(1deg);
  will-change: transform;
}

.hp-buttons {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
  justify-content: center;
  margin-bottom: 20px;
  will-change: transform;
}

/* Hero Scroll Hint */
.hero-scroll-hint {
  display: flex;
  flex-direction: column;
  align-items: center;
  opacity: 0.85;
  margin-top: 10px
}

.page-index__hero-btn {
  animation: scroll-bounce 2s ease-in-out infinite
}

@keyframes scroll-bounce {

  0%,
  100% {
    transform: translateY(0)
  }

  50% {
    transform: translateY(8px)
  }
}

/* Scroll hint button styles */
.elements-button-circle {
  width: 50px;
  height: 50px;
  border-radius: 50%;
  border: var(--border);
  background: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 4px 4px 0 var(--dark);
  cursor: pointer;
  transition: all 0.2s ease;
  outline: none;
}

.elements-button-circle:hover {
  background: var(--c4);
  transform: translate(-2px, -2px);
  box-shadow: 6px 6px 0 var(--dark);
}

.elements-button-circle:active {
  transform: translate(2px, 2px);
  box-shadow: 2px 2px 0 var(--dark);
}

.elements-button-circle svg {
  width: 20px;
  height: 20px;
  transform: rotate(90deg);
  /* Rotate right arrow to point downwards */
  transition: transform 0.3s ease;
  color: var(--dark);
}

.elements-button-circle:hover svg {
  transform: rotate(90deg) scale(1.15);
}

/* Hero Background Blobs */
.hero-blob {
  position: absolute;
  border-radius: 50%;
  z-index: 1;
  pointer-events: none;
  will-change: transform
}

.hero-blob-warm {
  width: clamp(300px, 45vw, 600px);
  height: clamp(300px, 45vw, 600px);
  background: radial-gradient(circle, rgba(255, 80, 50, 0.65) 0%, rgba(255, 0, 120, 0.35) 60%, transparent 100%);
  top: 5%;
  left: -8%;
  filter: blur(3px);
}

.hero-blob-cool {
  width: clamp(250px, 40vw, 550px);
  height: clamp(250px, 40vw, 550px);
  background: radial-gradient(circle, rgba(50, 80, 255, 0.7) 0%, rgba(0, 100, 255, 0.35) 60%, transparent 100%);
  top: -10%;
  right: -5%;
  clip-path: polygon(20% 0%, 100% 0%, 100% 80%, 80% 100%, 0% 60%);
  filter: blur(2px);
}

/* Rays Background */
.a-rays {
  position: fixed;
  top: 50%;
  left: 50%;
  width: 200vh;
  height: 200vw;
  background-image: repeating-linear-gradient(50deg, #00F8F1 0, #FFBD1E 20px, #FE848F 40px, #FFBD1E 60px, #00F8F1 80px);
  transform: translate3d(-50%, -50%, 0) rotate(-70deg);
  z-index: 0;
  opacity: 0.38;
  pointer-events: none;
  clip-path: url(#rays-clip);
  /* SVG clip-path for cross-browser compatibility and high performance */
}

/* Marquee */
#marquee-wrap {
  padding: 24px 0;
  background: var(--dark);
  border-top: var(--border);
  border-bottom: var(--border);
  overflow: hidden;
  transform: rotate(-1deg) scaleX(1.03);
  position: relative;
  z-index: 20
}

.marquee-row {
  overflow: hidden;
  white-space: nowrap
}

.marquee-row+.marquee-row {
  margin-top: 10px
}

.marquee-inner {
  display: inline-flex;
  will-change: transform
}

.marquee-inner span {
  color: var(--c4);
  font-size: 24px;
  font-weight: 900;
  padding: 0 18px;
  white-space: nowrap;
  text-transform: uppercase
}

/* Feature Sections */
.feat-section {
  padding: 80px clamp(16px, 5vw, 60px);
  position: relative;
  z-index: 10
}

#feat-twin {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  box-sizing: border-box;
  position: relative;
}

/* Digital Twin Background Blobs */
.twin-blob {
  position: absolute;
  border-radius: 50%;
  z-index: 2;
  pointer-events: none;
  filter: blur(60px);
  opacity: 0.85;
  will-change: transform, opacity;
}

.twin-blob-warm {
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(255, 0, 128, 0.75) 0%, rgba(255, 128, 0, 0.25) 60%, transparent 100%);
  top: -10%;
  left: -10%;
}

.twin-blob-cool {
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(0, 240, 255, 0.75) 0%, rgba(0, 128, 255, 0.25) 60%, transparent 100%);
  bottom: -10%;
  right: -10%;
}

.feat-card {
  position: relative;
  z-index: 10;
  display: flex;
  align-items: center;
  gap: 40px;
  padding: 50px;
  border: var(--border);
  border-radius: 24px;
  box-shadow: var(--shadow);
  max-width: 1000px;
  margin: 0 auto;
  transition: transform .3s
}

.feat-card:hover {
  transform: translateY(-4px)
}

.card-pink {
  background: var(--c1);
  color: #fff
}

.card-gold {
  background: var(--c3);
  color: var(--dark)
}

.feat-visual {
  flex: 1;
  min-width: 0;
  display: flex;
  align-items: center;
  justify-content: center
}

.feat-text {
  flex: 1;
  min-width: 0
}

.feat-text h2 {
  font-family: 'Space Grotesk', sans-serif;
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 900;
  text-transform: uppercase;
  margin-bottom: 10px
}

.feat-text p {
  font-size: 17px;
  font-weight: 600;
  line-height: 1.6;
  margin-bottom: 14px
}

.feat-tags {
  display: flex;
  gap: 8px;
  flex-wrap: wrap
}

.feat-tags span {
  padding: 5px 12px;
  background: rgba(255, 255, 255, .3);
  border: 2px solid currentColor;
  border-radius: 100px;
  font-size: 12px;
  font-weight: 700
}

.card-gold .feat-tags span {
  background: rgba(18, 18, 18, .08)
}

.feat-tags-split {
  display: grid;
  grid-template-columns: repeat(2, max-content);
  gap: 12px;
  margin-top: 15px;
}

.split-word {
  display: inline-block;
  border: 1.8px dashed rgba(255, 255, 255, 0.85);
  background-image: linear-gradient(135deg, #ffffff 30%, #ffd500 100%);
  background-size: 100%;
  -webkit-background-clip: text;
  -moz-background-clip: text;
  -webkit-text-fill-color: transparent;
  -moz-text-fill-color: transparent;
  background-clip: text;
  text-fill-color: transparent;
  padding: 8px 16px;
  border-radius: 10px;
  font-weight: 800;
  font-size: 1.2rem;
  text-align: center;
  background-color: rgba(255, 255, 255, 0.05);
  will-change: transform, opacity;
}

@media(max-width:768px) {
  .feat-card {
    flex-direction: column !important;
    padding: 24px;
    gap: 20px
  }
}

/* Section Titles */
.section-title {
  text-align: center;
  font-family: 'Space Grotesk', sans-serif;
  font-size: clamp(2.5rem, 6vw, 4rem);
  font-weight: 900;
  text-transform: uppercase;
  margin-bottom: 10px
}

.section-sub {
  text-align: center;
  font-size: 15px;
  font-weight: 600;
  color: rgba(18, 18, 18, .5);
  margin-bottom: 36px
}

/* ====== Skills Card Deal Container ====== */
#feat-skills {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
  padding: 100px 20px 20px 20px; /* 顶部预留 100px，完美避开悬浮导航栏 */
  box-sizing: border-box;
  z-index: 12; /* 保证发牌模块始终在最顶层，不被下方板块遮挡 */
}

#feat-skills .section-title {
  margin-top: 0;
  margin-bottom: 4px;
}

#feat-skills .section-sub {
  margin-bottom: 12px;
}

.skills-deal-container {
  display: flex;
  max-width: 1000px;
  margin: 0 auto;
  gap: 25px;
  align-items: center;
  padding: 5px 0;
}

/* 左侧：扑克牌库（牌盒） */
.deck-pile-wrapper {
  flex: 0 0 190px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
}

.deck-title {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 13px;
  font-weight: 800;
  color: var(--dark);
  border: var(--border);
  padding: 4px 10px;
  background: #fff;
  border-radius: 5px;
  box-shadow: 2px 2px 0 var(--dark);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.deck-pile {
  position: relative;
  width: 105px;
  height: 142px;
}

/* 牌盒下面的立体纸牌堆叠层 */
.deck-card-shadow-3, .deck-card-shadow-2, .deck-card-shadow-1, .deck-box {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  border-radius: 8px;
  border: var(--border);
  background: #fff;
  box-shadow: 2px 2px 0 rgba(18,18,18,0.15);
}

.deck-card-shadow-3 {
  transform: translate(-5px, 4px) rotate(-8deg);
  background: #ff00cc;
}

.deck-card-shadow-2 {
  transform: translate(4px, -3px) rotate(5deg);
  background: #ffd500;
}

.deck-card-shadow-1 {
  transform: translate(-2px, -5px) rotate(-3deg);
  background: #00f0ff;
}

.deck-box {
  transform: translate(0, 0);
  background: var(--dark);
  color: #fff;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  z-index: 5;
}

.deck-logo {
  font-size: 28px;
  color: var(--c4); /* 亮绿色星星 */
  animation: starPulse 2.2s infinite ease-in-out;
}

.deck-label {
  font-family: 'Outfit', sans-serif;
  font-size: 11px;
  font-weight: 900;
  letter-spacing: 0.1em;
}

@keyframes starPulse {
  0%, 100% { transform: scale(1); opacity: 1; }
  50% { transform: scale(1.15); opacity: 0.8; }
}

/* 右侧：发牌组 */
.deal-groups {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 14px; /* 稍微增加间距，舒缓高度占比 */
}

.deal-group {
  display: flex;
  align-items: center;
  gap: 20px;
  padding: 10px 18px; /* 稍微增加 padding 增强品质感 */
  background: #fff;
  border: var(--border);
  border-radius: 14px;
  box-shadow: var(--shadow);
  transition: transform 0.3s, box-shadow 0.3s;
}

.deal-group:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-hover);
}

/* 卡牌飞往的目标车道 */
.cards-target-lane {
  flex: 0 0 230px;
  height: 95px;
  display: flex;
  align-items: center;
  position: relative;
}

/* 新技能卡牌（扑克牌风格） */
.skill-card-new {
  position: absolute;
  width: 78px;
  height: 95px;
  background: #fff;
  border: 2px solid var(--dark);
  border-radius: 7px;
  box-shadow: 2px 2px 0 var(--dark);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  padding: 5px;
  cursor: pointer;
  opacity: 0;
  will-change: transform, opacity;
  transform: rotate(var(--r));
  transition: box-shadow 0.2s ease;
}

.skill-card-new:hover {
  transform: translateY(-12px) scale(1.1) rotate(0deg) !important;
  z-index: 20 !important;
  box-shadow: 4px 4px 0 var(--dark);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.cards-target-lane .skill-card-new:nth-child(1) { left: 0px; z-index: 1; }
.cards-target-lane .skill-card-new:nth-child(2) { left: 50px; z-index: 2; }
.cards-target-lane .skill-card-new:nth-child(3) { left: 100px; z-index: 3; }
.cards-target-lane .skill-card-new:nth-child(4) { left: 150px; z-index: 4; }

.card-icon-svg {
  width: 30px;
  height: 36px;
}

.card-name {
  font-size: 11.5px;
  font-weight: 800;
  color: var(--dark);
  text-align: center;
  line-height: 1.1;
}

/* 卡牌顶部的彩色指示条，像扑克牌花色 */
.skill-card-new::before {
  content: '';
  position: absolute;
  top: 3px;
  left: 3px;
  right: 3px;
  height: 4px;
  border-radius: 2px;
  background: var(--c);
  border: 0.8px solid var(--dark);
}

/* 右侧描述框 */
.group-desc-box {
  flex: 1;
}

.group-desc-box h3 {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 17px;
  font-weight: 900;
  margin-bottom: 3px;
  color: var(--dark);
}

.group-desc-box p {
  font-size: 13px;
  font-weight: 600;
  color: rgba(18, 18, 18, 0.7);
  line-height: 1.4;
}

/* Knowledge Graph */
#feat-kb {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  box-sizing: border-box;
  position: relative;
}

#feat-kb .feat-card {
  min-height: 450px;
}

.feat-tags-kb {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: 18px;
}

.split-word-kb {
  display: inline-block;
  border: 1.8px dashed rgba(18, 18, 18, 0.4);
  background-image: linear-gradient(135deg, #121212 30%, var(--kb-color-2, #3a008d) 100%);
  background-size: 100%;
  -webkit-background-clip: text;
  -moz-background-clip: text;
  -webkit-text-fill-color: transparent;
  -moz-text-fill-color: transparent;
  background-clip: text;
  text-fill-color: transparent;
  padding: 6px 14px;
  border-radius: 10px;
  font-weight: 800;
  font-size: 1.15rem;
  text-align: center;
  background-color: rgba(18, 18, 18, 0.04);
  will-change: transform, opacity;
}

#kb-visual {
  background: #fff;
  border: var(--border);
  border-radius: 16px;
  overflow: hidden;
  min-height: 300px
}

#kb-canvas {
  display: block;
  width: 100%;
  height: 350px
}

/* ====== Face Swap — 水平布局与调教面板 ====== */
.style-container {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 40px;
  max-width: 1040px;
  margin: 0 auto;
  align-items: center;
}

@media (max-width: 880px) {
  .style-container {
    grid-template-columns: 1fr;
    gap: 30px;
  }
}

.face-swap-column {
  width: 100%;
}

.face-swap-area {
  width: 100%;
  text-align: center;
}

.face-body-container {
  position: relative;
  width: 320px;
  height: 280px;
  margin: 0 auto;
  overflow: hidden;
  border: var(--border);
  background: #fff;
  border-radius: 20px;
  box-shadow: var(--shadow);
}

.face-body {
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  top: 0;
  width: 160px;
  height: 280px;
  z-index: 1;
  pointer-events: none;
}

.face-body svg {
  display: block;
  width: 100%;
  height: 100%;
}

.face-track-wrap {
  position: absolute;
  left: 0;
  width: 100%;
  top: 26px; /* 头部中心线Y=80 */
  height: 108px;
  overflow: hidden;
  z-index: 2;
  pointer-events: auto;
}

.face-track {
  display: flex;
  gap: 20px;
  position: absolute;
  left: 50%;
  top: 14px;
  padding: 0;
  cursor: grab;
  width: max-content;
  will-change: transform;
}

.face-track:active {
  cursor: grabbing;
}

.face-item {
  flex-shrink: 0;
  width: 72px;
  height: 72px;
  border: 3px solid var(--dark);
  border-radius: 50%;
  box-shadow: 4px 4px 0 var(--dark);
  overflow: hidden;
  background: #fff;
  transition: transform 0.25s var(--ease), opacity 0.25s var(--ease), filter 0.25s var(--ease), box-shadow 0.25s var(--ease);
  opacity: 0.4;
  transform: scale(0.68);
  filter: grayscale(35%);
}

.face-item svg {
  display: block;
  width: 100%;
  height: 100%;
}

.face-item.active {
  opacity: 1;
  transform: scale(1.15); /* 丝滑切到人物的头部，自动放大适配身体 */
  box-shadow: 6px 6px 0 var(--dark);
  filter: none;
  z-index: 10;
}

.face-label {
  font-size: 15px;
  font-weight: 800;
  margin: 16px 0 0;
  min-height: 22px;
  color: var(--dark);
}

/* DIY 调教面板 */
.diy-panel-column {
  width: 100%;
}

.diy-panel {
  background: #fff;
  border: var(--border);
  border-radius: 20px;
  box-shadow: var(--shadow);
  overflow: hidden;
  text-align: left;
}

.diy-panel-header {
  background: var(--dark);
  color: #fff;
  padding: 12px 20px;
  display: flex;
  align-items: center;
  gap: 6px;
}

.diy-panel-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  display: inline-block;
}
.diy-panel-dot:nth-child(1) { background: #ff00cc; }
.diy-panel-dot:nth-child(2) { background: #ffd500; }
.diy-panel-dot:nth-child(3) { background: #b4ff39; }

.diy-panel-title {
  font-weight: 900;
  font-size: 13.5px;
  letter-spacing: 0.05em;
  margin-left: 8px;
  font-family: 'Space Grotesk', sans-serif;
  text-transform: uppercase;
}

.diy-panel-body {
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.diy-control-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.diy-control-label {
  display: flex;
  justify-content: space-between;
  font-size: 13.5px;
  font-weight: 800;
  color: var(--dark);
}

.diy-val-display {
  font-family: 'Space Grotesk', sans-serif;
  font-weight: 900;
  color: var(--dark);
}

.diy-meter-bg {
  width: 100%;
  height: 12px;
  background: #f1f5f9;
  border: 2px solid var(--dark);
  border-radius: 6px;
  box-shadow: 2px 2px 0 var(--dark);
  overflow: hidden;
  position: relative;
}

.diy-meter-fill {
  height: 100%;
  width: 50%;
  border-right: 2px solid var(--dark);
  transition: width 0.35s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.diy-preview-box {
  border: var(--border);
  border-radius: 12px;
  background: #f8fafc;
  overflow: hidden;
  box-shadow: 4px 4px 0 var(--dark);
}

.diy-preview-header {
  background: #e2e8f0;
  border-bottom: 2px solid var(--dark);
  padding: 8px 16px;
  font-size: 11px;
  font-weight: 800;
  color: #475569;
}

.diy-preview-content {
  padding: 16px;
  font-size: 13.5px;
  font-weight: 700;
  color: var(--dark);
  line-height: 1.5;
  min-height: 72px;
}

.diy-hint-text {
  font-size: 11.5px;
  font-weight: 700;
  color: #64748b;
  line-height: 1.5;
}

/* ====== Platform Logos — 全部可见修复 ====== */
.group-label {
  text-align: center;
  font-size: 12px;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: rgba(18, 18, 18, .4);
  margin: 28px 0 14px
}

.logo-grid {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px;
  max-width: 800px;
  margin: 0 auto;
  padding: 0 16px;
  perspective: 1200px;
  transform-style: preserve-3d;
}

.logo-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 5px;
  width: 82px;
  padding: 12px 6px;
  background: #fff;
  border: var(--border);
  border-radius: 14px;
  box-shadow: 4px 4px 0 #121212;
  will-change: transform;
  transform-style: preserve-3d;
  cursor: pointer;
  opacity: 0;
}

.logo-img {
  width: 28px;
  height: 28px;
  object-fit: contain;
  filter: drop-shadow(1px 1px 0 rgba(18, 18, 18, 0.1));
}

.logo-card span:last-child {
  font-size: 10px;
  font-weight: 700;
  white-space: nowrap
}

/* CTA */
#cta {
  padding: 60px clamp(16px, 5vw, 60px)
}

.cta-card {
  max-width: 900px;
  margin: 0 auto;
  background: var(--c2);
  border: var(--border);
  border-radius: 30px;
  box-shadow: var(--shadow);
  padding: 60px 40px;
  text-align: center;
  position: relative;
  overflow: hidden
}

.cta-card h2 {
  font-family: 'Space Grotesk', sans-serif;
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 900;
  color: #fff;
  -webkit-text-stroke: 2px var(--dark);
  text-shadow: 5px 5px 0 var(--dark);
  margin-bottom: 24px;
  text-transform: uppercase
}

.cta-char-c { color: var(--c1); }
.cta-char-h { color: var(--c3); }
.cta-char-a { color: var(--c4); }
.cta-char-t { color: var(--c2); }
.cta-char-i { color: var(--c5); }
.cta-char-p { color: var(--c6); }

.cta-circle {
  position: absolute;
  bottom: -40px;
  right: -40px;
  width: 150px;
  height: 150px;
  background: var(--c4);
  border: var(--border);
  border-radius: 50%
}

/* Footer */
footer {
  background: var(--dark);
  color: #fff;
  padding: 40px clamp(16px, 5vw, 60px) 24px;
  border-top: var(--border)
}

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

.footer-logo {
  font-size: 28px;
  font-weight: 900;
  color: var(--c4)
}

.footer-text, .footer-icp {
  font-size: 14px;
  opacity: .6
}

.footer-icp a {
  color: inherit;
  transition: color 0.2s;
}

.footer-icp a:hover {
  text-decoration: underline;
  color: var(--c4);
}

/* SEO: footer 关键词导航内链 */
.footer-nav {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
  align-items: center;
}

.footer-nav a {
  font-size: 13px;
  font-weight: 700;
  color: rgba(255, 255, 255, 0.55);
  text-decoration: none;
  transition: color 0.2s;
  white-space: nowrap;
}

.footer-nav a:hover {
  color: var(--c4);
}

@media (max-width: 768px) {
  .footer-inner {
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
  }
  .footer-nav {
    gap: 12px;
  }
}

/* DNA Helix Flow animation */
.dna-strand {
  stroke-dasharray: 12, 8;
  animation: dna-flow 2.5s linear infinite;
}

@keyframes dna-flow {
  to {
    stroke-dashoffset: -20;
  }
}

/* ====== HERO OVERVIEW 全景板块样式 ====== */
#hero-overview {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  z-index: 11;
  overflow: hidden;
}

.mob-overview-title,
.mob-overview-sub {
  display: none;
}

.overview-subtitle {
  position: absolute;
  left: 100%;
  top: 50%;
  transform: translateY(-50%) scale(0);
  transform-origin: left center;
  font-family: 'Space Grotesk', sans-serif;
  font-size: clamp(28px, 3.2vw, 42px);
  font-weight: 800;
  color: var(--dark);
  background: var(--c4);
  border: var(--border);
  padding: 8px 24px;
  box-shadow: 4px 4px 0 var(--dark);
  border-radius: 8px;
  z-index: 20;
  white-space: nowrap;
  pointer-events: none;
  opacity: 0;
  margin-left: 20px;
}

.overview-svg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 1;
}

/* 高级管线底座 */
.ov-path-base {
  stroke: var(--dark);
  stroke-width: 6px;
  stroke-linecap: round;
  fill: none;
}

/* 内部流光虚线 */
.ov-path-flow {
  stroke: var(--flow-color, #00f0ff);
  stroke-width: 3px;
  stroke-linecap: round;
  fill: none;
  stroke-dasharray: 10, 10;
  transition: stroke-dashoffset 0.1s linear;
}

/* 高端持续性流光 */
.ov-path-flow.active {
  animation: ov-dash-flow 0.8s linear infinite;
}

@keyframes ov-dash-flow {
  from {
    stroke-dashoffset: 0 !important;
  }

  to {
    stroke-dashoffset: -20 !important;
  }
}

/* 工作流卡片节点 */
.ov-node {
  position: absolute;
  z-index: 2;
  background: #fff;
  border: 3.5px solid var(--dark);
  border-radius: 20px;
  padding: 16px 20px;
  width: 360px;
  box-shadow: 6px 6px 0 var(--dark);
  display: flex;
  align-items: center;
  gap: 16px;
  transition: transform 0.2s, box-shadow 0.2s;
  opacity: 0;
  transform-origin: center;
}

.ov-node:hover {
  transform: translate(-3px, -3px);
  box-shadow: 9px 9px 0 var(--dark);
}

/* 数字胶囊徽章 */
.node-badge {
  flex-shrink: 0;
  width: 42px;
  height: 42px;
  border-radius: 50%;
  border: 2.5px solid var(--dark);
  color: var(--dark);
  font-family: 'Space Grotesk', sans-serif;
  font-size: 16px;
  font-weight: 900;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 2px 2px 0 var(--dark);
}

.node-body {
  flex: 1;
}

.node-title {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 16px;
  font-weight: 900;
  color: var(--dark);
  margin-bottom: 4px;
}

.node-desc {
  font-size: 12px;
  color: #555;
  line-height: 1.4;
  font-weight: 600;
}

/* Z 字形左右排布定位 (对应贝塞尔连接线) */
/* Z 字形左右排布定位 (对应贝塞尔连接线) */
.card-w1 {
  top: calc(32% - 50px);
  left: calc(18.33% - 41px);
}

.card-w2 {
  top: calc(32% - 50px);
  right: calc(18.33% - 41px);
}

.card-w3 {
  top: calc(56% - 50px);
  left: calc(18.33% - 41px);
}

.card-w4 {
  top: calc(56% - 50px);
  right: calc(18.33% - 41px);
}

.card-w5 {
  top: calc(80% - 50px);
  left: calc(18.33% - 41px);
}

.card-w6 {
  top: calc(80% - 50px);
  right: calc(18.33% - 41px);
}

.card-w2,
.card-w4,
.card-w6 {
  flex-direction: row-reverse;
  text-align: right;
}

/* ====== 响应式断点控制 ====== */
@media (max-width: 1024px) {
  .ov-node {
    width: 310px;
    padding: 12px 16px;
  }

  .card-w1 {
    top: calc(32% - 45px);
    left: calc(18.33% - 37px);
  }

  .card-w2 {
    top: calc(32% - 45px);
    right: calc(18.33% - 37px);
    left: auto;
  }

  .card-w3 {
    top: calc(56% - 45px);
    left: calc(18.33% - 37px);
  }

  .card-w4 {
    top: calc(56% - 45px);
    right: calc(18.33% - 37px);
    left: auto;
  }

  .card-w5 {
    top: calc(80% - 45px);
    left: calc(18.33% - 37px);
  }

  .card-w6 {
    top: calc(80% - 45px);
    right: calc(18.33% - 37px);
    left: auto;
  }
}

/* ============================================================
   移动端响应式适配 (<= 768px)
   ============================================================ */
@media (max-width: 768px) {
  /* --- Hero：内容驱动高度，布局紧凑，层级正确 --- */
  #hero {
    height: auto !important;
    min-height: auto !important;
    padding: 80px 16px 56px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    position: relative !important;
    overflow: hidden !important;
  }
  #hero-content {
    align-items: center;
    gap: 16px;
    width: 100%;
    z-index: 10;
  }
  /* --- Hero CHATIP 大字与 3D 效果禁用 --- */
  #title-3d {
    transform-style: flat !important;
    will-change: auto !important;
    overflow: visible !important;
    display: flex !important;
    justify-content: center !important;
    flex-wrap: wrap !important;
    width: 100% !important;
  }
  .hp-char {
    font-size: min(15vw, 60px) !important;
    animation-name: jumpWaveMob !important;
    animation-duration: 4s !important;
    animation-timing-function: ease-in-out !important;
    will-change: transform !important;
    opacity: 1 !important;
  }
  .hp-char-wrap {
    opacity: 1 !important;
    transform: none !important;
  }
  .hp-presents {
    font-size: 11px !important;
    padding: 4px 14px !important;
    box-shadow: 2px 2px 0 var(--dark) !important;
    letter-spacing: 0.05em !important;
    margin-bottom: 12px !important;
    opacity: 1 !important;
    transform: none !important;
  }
  .hp-hero-desc {
    font-size: 0.88rem;
    padding: 0 8px;
    max-width: 290px;
    opacity: 1 !important;
    transform: none !important;
  }
  .hp-buttons {
    flex-direction: row !important;
    flex-wrap: wrap;
    justify-content: center;
    gap: 10px;
    opacity: 1 !important;
    transform: none !important;
  }
  .hp-buttons .neo-btn-outline {
    display: none !important;
  }
  .neo-btn, .neo-btn-outline {
    font-size: 14px !important;
    padding: 12px 20px !important;
  }

  /* --- 吉祥物保留展示并缩小（静止放置在 Hero 四角，绝对不遮挡和溢出） --- */
  .mascot {
    display: block !important;
    position: absolute !important;
    opacity: 0.65 !important;
    pointer-events: none !important;
    z-index: 1 !important;
    transform: none !important;
  }
  .mascot svg {
    width: 48px !important;
    height: 48px !important;
  }
  .m-tv {
    top: 90px !important;
    left: 12px !important;
    bottom: auto !important;
    right: auto !important;
  }
  .m-writer {
    top: 260px !important;
    left: 20px !important;
    bottom: auto !important;
    right: auto !important;
  }
  .m-camera {
    top: 140px !important;
    right: 12px !important;
    bottom: auto !important;
    left: auto !important;
  }

  /* --- #tilt-card 样式重置，保留文字并关闭 3D 视差 --- */
  #tilt-card {
    display: block !important;
    perspective: none !important;
    transform: none !important;
    width: 100% !important;
    opacity: 1 !important;
  }

  /* 隐藏 Hero 顶部的 subtitle，并为移动端工作流卡片上方赋予精美总标题 */
  .overview-subtitle {
    display: none !important;
  }
  .mob-overview-title {
    display: block !important;
    text-align: center !important;
    margin: 0 auto 8px !important;
  }
  .mob-overview-sub {
    display: block !important;
    text-align: center !important;
    margin: 0 auto 24px !important;
  }

  /* 赛道背景在手机端显示精致随机打散，这里仅设置最装帧定位 */
  #track-bg {
    position: absolute !important;
    inset: 0 !important;
    z-index: 0 !important;
    pointer-events: none !important;
  }
  .bg-track {
    position: absolute !important;
    font-family: 'Space Grotesk', sans-serif !important;
    font-weight: 800 !important;
    color: rgba(18, 18, 18, 0.08) !important;
    white-space: nowrap !important;
    z-index: 0 !important;
  }

  /* 移动端无缝纯 CSS 跑马灯滚动逻辑 */
  #marquee-wrap {
    display: block !important;
    padding: 14px 0 !important;
    background: var(--dark) !important;
    border-top: var(--border) !important;
    border-bottom: var(--border) !important;
    overflow: hidden !important;
    transform: rotate(-1deg) scaleX(1.03) !important;
    position: relative !important;
    z-index: 20 !important;
  }
  .marquee-row {
    display: flex !important;
    overflow: hidden !important;
    white-space: nowrap !important;
    width: 100% !important;
  }
  .marquee-row+.marquee-row {
    margin-top: 6px !important;
  }
  .marquee-inner {
    display: flex !important;
    white-space: nowrap !important;
    width: max-content !important;
  }
  #mq1 .marquee-inner {
    animation: mobMarqueeLeft 24s linear infinite !important;
  }
  #mq2 .marquee-inner {
    animation: mobMarqueeRight 24s linear infinite !important;
  }
  .marquee-inner span {
    font-size: 14px !important;
    color: var(--c4) !important;
    font-weight: 900 !important;
    padding: 0 10px !important;
    white-space: nowrap !important;
    display: inline-block !important;
  }

  /* --- 所有 section 重置为正常流布局 --- */
  #hero-overview, #feat-skills, #feat-kb,
  #feat-ai-style, #feat-platforms, #feat-cta {
    position: relative !important;
    height: auto !important;
    min-height: auto !important;
    width: 100% !important;
    opacity: 1 !important;
    visibility: visible !important;
    pointer-events: auto !important;
    overflow: visible !important;
    transform: none !important;
  }
  #hero-overview {
    overflow: hidden !important;
    padding: 48px 16px 64px !important;
  }

  /* --- 步骤卡片流式堆叠且默认全部显示，文字一律向左对齐 --- */
  .ov-node {
    width: 100% !important;
    max-width: 380px !important;
    margin: 0 auto 16px !important;
    position: relative !important;
    top: auto !important; left: auto !important;
    right: auto !important; bottom: auto !important;
    transform: none !important;
    opacity: 1 !important;
    visibility: visible !important;
    flex-direction: row !important;
    text-align: left !important;
  }
  .ov-node * {
    opacity: 1 !important;
    visibility: visible !important;
  }
  .overview-svg {
    display: none !important; /* 隐藏连线 */
  }

  /* --- Skills 技能卡牌横滑展示，防卡牌裁剪 --- */
  #feat-skills {
    padding: 50px 16px 60px !important;
  }
  .skills-deal-container {
    flex-direction: column !important;
    gap: 16px !important;
    padding: 0 !important;
  }
  .deck-pile-wrapper { display: none !important; }
  .deal-groups {
    width: 100% !important;
  }
  .deal-group {
    flex-direction: column !important;
    align-items: flex-start !important;
    gap: 10px !important;
    padding: 14px 16px !important;
  }
  .cards-target-lane {
    position: relative !important;
    height: auto !important;
    width: 100% !important;
    display: flex !important;
    flex-direction: row !important;
    gap: 8px !important;
    overflow-x: auto !important;
    padding: 0 12px 6px 12px !important;
    justify-content: flex-start !important;
  }
  .cards-target-lane .skill-card-new {
    position: relative !important;
    left: auto !important; right: auto !important;
    top: auto !important; bottom: auto !important;
    transform: rotate(var(--r)) !important;
    flex-shrink: 0 !important;
    width: 72px !important;
    height: 100px !important;
    margin: 0 !important;
    z-index: auto !important;
    opacity: 1 !important;
  }
  .group-desc-box {
    opacity: 1 !important;
    transform: none !important;
    width: 100% !important;
    max-width: 100% !important;
  }
  .group-desc-box h3 { font-size: 15px; margin-bottom: 4px; }
  .group-desc-box p  { font-size: 13px; line-height: 1.5; }

  /* --- KB 知识库（解决双重白框，边框仅由外层 kb-visual 承担） --- */
  #feat-kb { padding: 50px 16px 60px; }
  #kb-visual {
    background: #fff !important;
    border: var(--border) !important;
    border-radius: 20px !important;
    box-shadow: var(--shadow) !important;
    overflow: hidden !important;
    width: 100% !important;
    height: 260px !important;
    min-height: auto !important;
  }
  #kb-canvas {
    width: 100% !important;
    height: 100% !important;
    background: transparent !important;
    border: none !important;
    box-shadow: none !important;
    border-radius: 0 !important;
  }
  .split-word-kb { font-size: clamp(1.3rem, 6vw, 1.7rem) !important; }

  /* --- AI Style：精确头身对齐及拖拽手势交互 --- */
  #feat-ai-style { padding: 50px 16px 60px; }
  .face-body-container {
    position: relative !important;
    width: 320px !important;
    height: 280px !important;
    margin: 0 auto !important;
    overflow: hidden !important;
    background: #fff;
    border: var(--border);
    border-radius: 20px;
    box-shadow: var(--shadow);
  }
  .face-body {
    position: absolute !important;
    left: 50% !important;
    transform: translateX(-50%) !important;
    top: 0 !important;
    width: 160px !important;
    height: 280px !important;
    z-index: 1 !important;
  }
  .face-track-wrap {
    position: absolute !important;
    top: 26px !important;
    left: 0 !important;
    width: 100% !important;
    height: 90px !important;
    overflow: visible !important;
    z-index: 10 !important;
    user-select: none;
    -webkit-user-select: none;
  }
  .face-track {
    position: absolute !important;
    display: flex !important;
    gap: 20px !important;
    left: 50% !important;
    top: 0 !important;
    width: max-content !important;
    transform: translateX(-36px); /* 默认第一个头像对准中轴 */
    will-change: transform;
    pointer-events: auto !important;
  }
  .face-item {
    width: 72px !important;
    height: 72px !important;
    flex-shrink: 0 !important;
    cursor: pointer;
  }

  /* --- 数字分身：精确 240px 对齐 DNA 链端点 --- */
  #real-person {
    display: block !important;
    opacity: 1 !important;
    transform: none !important;
  }
  #digital-twin {
    display: block !important;
    opacity: 1 !important;
    transform: translateX(240px) !important; /* 精确位移 240px，与 DNA 链端点对齐 */
  }
  #dna-chain {
    display: block !important;
    opacity: 1 !important;
    transform: scaleX(1) !important;
  }
  .twin-blob { display: none !important; }
  #ai-preview-wrap {
    width: 100% !important;
  }
  #diy-panel {
    width: 100% !important;
    max-width: 100% !important;
    box-sizing: border-box;
  }

  /* --- Platforms 平台 --- */
  .logo-grid {
    grid-template-columns: repeat(4, 1fr) !important;
    gap: 10px !important;
  }
  .logo-card {
    opacity: 1 !important;
    transform: none !important;
    font-size: 10px !important;
  }
  .logo-img { width: 28px !important; height: 28px !important; }

  /* --- CTA 结尾 --- */
  #cta { padding: 50px 16px 80px; }
  #cta-heading {
    font-size: clamp(2.2rem, 11vw, 3.5rem) !important;
    line-height: 1.1 !important;
  }
  .cta-char { font-size: inherit !important; }

  /* --- Section 通用标题 --- */
  .section-label { font-size: 0.72rem; }
  .section-title { font-size: clamp(1.6rem, 7vw, 2.2rem) !important; }
  .section-sub { font-size: 13px; padding: 0 8px; }

  /* --- 导航 --- */
  #nav { height: 52px; padding: 0 14px; }
  .nav-logo { font-size: 14px; }
}



/* ============================================================
   平板端修复 (769px - 1024px)
   ============================================================ */
@media (min-width: 769px) and (max-width: 1024px) {
  .hp-char {
    font-size: clamp(4rem, 10vw, 8rem) !important;
  }
  .logo-grid {
    grid-template-columns: repeat(5, 1fr) !important;
  }
  #tilt-card {
    width: min(50vw, 400px);
  }
  #cta-heading {
    font-size: clamp(3rem, 8vw, 6rem) !important;
}

/* ====== 移动端专用全局 Keyframes（防嵌套兼容性） ====== */
@keyframes mobMarqueeLeft {
  0% { transform: translate3d(0, 0, 0); }
  100% { transform: translate3d(-50%, 0, 0); }
}

@keyframes mobMarqueeRight {
  0% { transform: translate3d(-50%, 0, 0); }
  100% { transform: translate3d(0, 0, 0); }
}

@keyframes jumpWaveMob {
  0%, 20%, 100% {
    transform: translateY(0) scale(1) rotate(calc(var(--r) * 1deg / 2));
  }
  10% {
    transform: translateY(-16px) scale(1.08) rotate(calc(var(--r) * 1deg));
  }
}