/* ===========================
   攸链科技 YOULINK 企业官网 V2.0
   深色科技风 · 大气稳重
   =========================== */

:root {
  --ink: #0A0E27;
  --ink-light: #12183A;
  --ink-lighter: #1A224D;
  --tech: #00D4FF;
  --tech-light: #33DDFF;
  --tech-dark: #0099CC;
  --accent: #FF3D71;
  --accent-light: #FF6B96;
  --white: #FFFFFF;
  --off-white: #F4F6FF;
  --gray-1: #8A8FA6;
  --gray-2: #6B7089;
  --gray-3: #4A4F66;
  --radius: 0;
  --font-primary: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
  --font-display: 'Georgia', 'Songti SC', serif;
  --ease: cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

/* 整屏滚动吸附（移动端后备，桌面端由 JS 接管滚轮实现一次滚动跳一屏）*/
@media (max-width: 768px) {
  html.snap-enabled {
    scroll-snap-type: y proximity;
  }
  html.snap-enabled section,
  html.snap-enabled footer {
    scroll-snap-align: start;
  }
}

body {
  font-family: var(--font-primary);
  color: var(--white);
  background: var(--ink);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  letter-spacing: 0.3px;
  overflow-x: hidden;
}

img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; transition: color 0.25s; }
ul { list-style: none; }

.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 48px;
}

/* Header / Nav */
.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  padding: 20px 0;
  transition: all 0.4s var(--ease);
  border-bottom: 1px solid transparent;
}

.header.scrolled {
  background: rgba(10, 14, 39, 0.95);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  padding: 14px 0;
  border-bottom-color: rgba(255,255,255,0.06);
}

.header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: none;
  width: 100%;
  padding: 0 48px;
  box-sizing: border-box;
}

.logo {
  display: flex;
  align-items: center;
  gap: 14px;
  color: var(--white);
}

.logo-img {
  height: 36px;
  width: auto;
  display: block;
  filter: brightness(0) invert(1);
  transition: filter 0.3s;
}

.logo-text {
  display: flex;
  align-items: center;
  line-height: 1;
}

.logo-title {
  font-size: 28px;
  font-weight: 500;
  letter-spacing: 2px;
  color: var(--white);
  line-height: 1;
}

.logo-subtitle {
  font-size: 11px;
  color: var(--gray-1);
  letter-spacing: 1.5px;
  margin-top: 2px;
}

.nav {
  display: flex;
  align-items: center;
  gap: 32px;
  margin-right: 0;
}

.nav a {
  font-size: 15px;
  font-weight: 400;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: rgba(255,255,255,0.65);
  position: relative;
  padding: 6px 0;
}

.nav a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--tech);
  transition: width 0.3s;
}

.nav a:hover,
.nav a.active {
  color: var(--tech);
}

.nav a:hover::after,
.nav a.active::after {
  width: 100%;
}

/* ===== 导航下拉菜单 ===== */
.nav-dropdown {
  position: relative;
  display: flex;
  align-items: center;
}

.nav-drop-toggle {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.nav-drop-toggle::before {
  content: '';
  width: 0;
  height: 0;
  border-left: 4px solid transparent;
  border-right: 4px solid transparent;
  border-top: 4px solid currentColor;
  opacity: 0.6;
  order: 1;
}

.nav-drop-menu {
  position: absolute;
  top: calc(100% + 12px);
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  gap: 2px;
  min-width: 140px;
  padding: 10px 12px;
  background: rgba(10, 14, 39, 0.98);
  border: 1px solid rgba(0, 212, 255, 0.25);
  border-radius: 8px;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: all 0.25s ease;
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.35);
  z-index: 1000;
}

.nav-drop-menu::before {
  content: '';
  position: absolute;
  top: -6px;
  left: 50%;
  transform: translateX(-50%) rotate(45deg);
  width: 10px;
  height: 10px;
  background: rgba(10, 14, 39, 0.98);
  border-left: 1px solid rgba(0, 212, 255, 0.25);
  border-top: 1px solid rgba(0, 212, 255, 0.25);
}

.nav-dropdown:hover .nav-drop-menu,
.nav-drop-toggle:focus + .nav-drop-menu,
.nav-drop-menu:focus-within {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  top: calc(100% + 8px);
}

.nav-drop-menu a {
  font-size: 14px;
  letter-spacing: 0.6px;
  padding: 8px 10px;
  color: rgba(255,255,255,0.75);
  white-space: nowrap;
  border-radius: 4px;
  transition: all 0.2s;
}

.nav-drop-menu a:hover,
.nav-drop-menu a.active {
  color: var(--tech);
  background: rgba(0, 212, 255, 0.08);
}

.nav-drop-menu a::after {
  display: none;
}


.mobile-menu-btn {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  color: var(--white);
}

.mobile-menu-btn svg {
  width: 26px;
  height: 26px;
}

/* Hero */
.hero {
  min-height: 100vh;
  position: relative;
  display: flex;
  align-items: center;
  padding: 80px 0;
  overflow: hidden;
  background: linear-gradient(135deg, var(--ink) 0%, var(--ink-light) 50%, var(--ink-lighter) 100%);
}

.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.03) 1px, transparent 1px);
  background-size: 60px 60px;
  opacity: 0.5;
  pointer-events: none;
}

.hero::after {
  content: '';
  position: absolute;
  top: -20%;
  right: -10%;
  width: 60%;
  height: 140%;
  background: radial-gradient(ellipse, rgba(0, 212, 255, 0.12) 0%, transparent 65%);
  animation: heroGlow 18s ease-in-out infinite;
  pointer-events: none;
}

@keyframes heroGlow {
  0%, 100% { transform: scale(1) rotate(0deg); opacity: 0.5; }
  50% { transform: scale(1.1) rotate(4deg); opacity: 0.8; }
}

.hero .container {
  position: relative;
  z-index: 2;
  padding-top: 0;
}

.hero-tag {
  display: inline-block;
  font-size: 12px;
  color: var(--tech);
  letter-spacing: 2.5px;
  text-transform: uppercase;
  padding: 8px 16px;
  border: 1px solid rgba(0, 212, 255, 0.3);
  background: rgba(0, 212, 255, 0.05);
  margin-bottom: 48px;
}

.hero h1 {
  font-size: clamp(34px, 5.2vw, 80px);
  font-weight: 200;
  line-height: 1.12;
  letter-spacing: -2px;
  margin-bottom: clamp(40px, 6vw, 80px);
}

.hero h1 em {
  font-style: normal;
  color: var(--tech);
  font-weight: 300;
}

.hero-subtitle {
  font-size: clamp(16px, 1.4vw, 20px);
  color: var(--gray-1);
  font-weight: 300;
  margin-bottom: clamp(40px, 6vw, 72px);
  line-height: 1.7;
}

.hero-btns {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
  margin-bottom: 64px;
}

/* 首页 Hero 底部扫描线 */
.hero-line {
  position: relative;
  width: 100%;
  max-width: 720px;
  height: 1px;
  margin-top: 64px;
  background: rgba(255,255,255,0.08);
}

.hero-line span {
  position: absolute;
  left: 0;
  top: 0;
  width: 140px;
  height: 1px;
  background: linear-gradient(90deg, var(--tech), rgba(0,212,255,0.1));
  box-shadow: 0 0 12px rgba(0, 212, 255, 0.6);
  animation: heroLineScan 3s ease-in-out infinite;
}

.hero-scroll {
  position: absolute;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  color: var(--gray-1);
  font-size: 11px;
  letter-spacing: 2px;
  text-transform: uppercase;
}

.hero-scroll-line {
  width: 1px;
  height: 48px;
  background: linear-gradient(to bottom, var(--tech), transparent);
  animation: scrollLine 1.8s ease-in-out infinite;
}

@keyframes scrollLine {
  0%, 100% { transform: translateY(0); opacity: 0.6; }
  50% { transform: translateY(12px); opacity: 1; }
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 18px 36px;
  font-size: 14px;
  font-weight: 500;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  transition: all 0.3s var(--ease);
  cursor: pointer;
  border: none;
}

.btn-primary {
  background: var(--tech);
  color: var(--ink);
}

.btn-primary:hover {
  background: var(--white);
  transform: translateY(-2px);
  box-shadow: 0 10px 40px rgba(0, 212, 255, 0.3);
}

/* CTA 主按钮收窄，让文字框更紧凑 */
.cta .btn-primary {
  padding: 16px 40px;
  font-size: 16px;
}

.btn-secondary {
  background: transparent;
  color: var(--white);
  border: 1px solid rgba(255,255,255,0.2);
}

.btn-secondary:hover {
  border-color: var(--tech);
  color: var(--tech);
  transform: translateY(-2px);
}

/* Section */
.section {
  padding: 80px 0;
  position: relative;
}

.section-dark { background: var(--ink); }

.section-light {
  background: var(--off-white);
  color: var(--ink);
}

.section-light .section-title,
.section-light .section-title h2,
.section-light .card h3,
.section-light .data-card h3,
.section-light .service-card h3,
.section-light .process-step h3 {
  color: var(--ink);
}

.section-light .card p,
.section-light .data-card p,
.section-light .service-card p,
.section-light .process-step p {
  color: var(--gray-2);
}

.section-header {
  margin-bottom: 56px;
  max-width: 1080px;
}

.section-center .section-header {
  margin-left: auto;
  margin-right: auto;
  text-align: center;
}

.section-tag {
  display: inline-block;
  font-size: 12px;
  color: var(--tech);
  letter-spacing: 2.5px;
  text-transform: uppercase;
  margin-bottom: 16px;
  opacity: 0.85;
}

.scenario-section .section-tag {
  text-transform: none;
}

.section-title {
  font-size: clamp(22px, 3.2vw, 40px);
  font-weight: 200;
  line-height: 1.2;
  letter-spacing: -0.5px;
  margin-bottom: 14px;
  color: var(--white);
  white-space: nowrap;
}

.section-subtitle {
  font-size: 18px;
  color: var(--gray-1);
  max-width: 620px;
  line-height: 1.7;
}

.core-advantage-section .section-subtitle {
  max-width: none;
  line-height: 1.7;
}

#native-ai .section-subtitle {
  white-space: nowrap;
  max-width: none;
}

#native-ai .section-desc {
  font-size: 16px;
  color: var(--gray-1);
  max-width: 820px;
  line-height: 1.7;
  margin-top: 14px;
}

/* Page Header */
.page-header {
  padding: 80px 0;
  background: linear-gradient(135deg, var(--ink) 0%, var(--ink-light) 100%);
  text-align: left;
  position: relative;
  overflow: hidden;
}

.page-header::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.03) 1px, transparent 1px);
  background-size: 60px 60px;
  opacity: 0.5;
}

.page-header .container { position: relative; z-index: 2; }

.page-header h1 {
  font-size: clamp(28px, 4.5vw, 56px);
  font-weight: 200;
  letter-spacing: -1px;
  margin-bottom: 18px;
  white-space: nowrap;
}

.page-header p {
  font-size: clamp(13px, 1.5vw, 18px);
  color: var(--gray-1);
  max-width: 640px;
  margin: 0;
  white-space: normal;
  line-height: 1.8;
}

.intake-header .container {
  max-width: 760px;
}

.intake-header p {
  max-width: 100%;
}

/* Services page hero: full viewport, left-aligned */
.services-hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  text-align: left;
  padding: 140px 0;
  position: relative;
}

.services-hero .container {
  width: 100%;
  position: relative;
  transform: translateY(-80px);
}

/* 服务方案各 U 版块：占满整屏，深浅各自独立不混排 */
.scenario-section {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  position: relative;
}

.scenario-section .container {
  width: 100%;
}

.scenario-section .hero-scroll {
  position: static;
  left: auto;
  bottom: auto;
  transform: none;
  margin-top: 32px;
}

.services-eyebrow {
  margin-top: 80px;
  margin-bottom: 32px;
}

.services-hero h1 {
  text-align: left;
  margin: 80px 0 28px 0;
  white-space: normal;
  max-width: 880px;
  font-size: clamp(42px, 5.8vw, 76px);
  font-weight: 200;
  line-height: 1.12;
  letter-spacing: -2px;
}

.services-hero h1 em {
  font-style: normal;
  color: var(--tech);
  font-weight: 300;
  white-space: nowrap;
}

.services-hero .services-bottom-text {
  text-align: left;
  margin: 72px 0 80px 0;
  max-width: 640px;
  white-space: normal;
  line-height: 1.8;
  color: rgba(255,255,255,0.68);
  font-size: clamp(15px, 1.6vw, 20px);
  font-weight: 300;
}

.services-hero-line {
  position: relative;
  width: 100%;
  max-width: 720px;
  height: 1px;
  margin-top: 80px;
  background: rgba(255,255,255,0.08);
}

.services-hero-line span {
  position: absolute;
  left: 0;
  top: 0;
  width: 140px;
  height: 1px;
  background: linear-gradient(90deg, var(--tech), rgba(0,212,255,0.1));
  box-shadow: 0 0 12px rgba(0, 212, 255, 0.6);
  animation: heroLineScan 3s ease-in-out infinite;
}

@keyframes heroLineScan {
  0% {
    left: -140px;
    opacity: 0;
  }
  20% {
    opacity: 1;
  }
  80% {
    opacity: 0.2;
  }
  100% {
    left: 100%;
    opacity: 0;
  }
}

/* 服务方案首屏：滚动提示放在扫描线下方，随文档流排列 */
.services-hero .hero-scroll {
  position: static;
  margin: 40px auto 0;
  left: auto;
  bottom: auto;
  transform: none;
}

/* ===== 联系我们表单 ===== */
.intake-section {
  padding: 72px 0 100px;
  background: var(--ink-light);
}
.intake-section .container { max-width: 760px; }
.intake-form {
  background: rgba(255,255,255,0.03);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 16px;
  padding: 40px;
  box-shadow: 0 20px 60px rgba(0,0,0,0.3);
}
.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 22px;
  margin-bottom: 22px;
}
.form-group { display: flex; flex-direction: column; margin-bottom: 22px; }
.form-row .form-group { margin-bottom: 0; }
.form-group label {
  font-size: 13px;
  color: var(--gray-1);
  margin-bottom: 8px;
  letter-spacing: 0.5px;
}
.form-group label .muted { color: var(--gray-2); font-size: 11px; letter-spacing: 0; }
.form-group input,
.form-group select,
.form-group textarea {
  background: rgba(10,14,39,0.5);
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: 8px;
  padding: 12px 14px;
  color: var(--white);
  font-size: 14px;
  font-family: inherit;
  transition: border-color 0.25s, box-shadow 0.25s;
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--tech);
  box-shadow: 0 0 0 3px rgba(0,212,255,0.15);
}
.form-group textarea { resize: vertical; }
.form-group input::placeholder,
.form-group textarea::placeholder { color: var(--gray-2); }
.form-group input[type="file"] {
  padding: 10px 12px;
  font-size: 13px;
  cursor: pointer;
}
.form-actions {
  display: flex;
  align-items: center;
  gap: 18px;
  margin-top: 8px;
  flex-wrap: wrap;
}
.form-note { font-size: 12px; color: var(--gray-2); margin: 0; }
.form-status {
  margin-top: 20px;
  padding: 14px 16px;
  border-radius: 8px;
  font-size: 14px;
  line-height: 1.6;
}
.form-status.ok {
  background: rgba(0,212,255,0.12);
  border: 1px solid rgba(0,212,255,0.4);
  color: var(--tech);
}
.form-status.err {
  background: rgba(255,80,80,0.12);
  border: 1px solid rgba(255,80,80,0.4);
  color: #ff8a8a;
}
@media (max-width: 768px) {
  .form-row { grid-template-columns: 1fr; gap: 0; }
  .intake-form { padding: 28px 20px; }
}

/* Stats Bar */
.stats-bar {
  background: rgba(0, 212, 255, 0.05);
  border-top: 1px solid rgba(0, 212, 255, 0.1);
  border-bottom: 1px solid rgba(0, 212, 255, 0.1);
  padding: 40px 0;
}

.stats-bar .container {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.stat-item {
  text-align: center;
  position: relative;
}

.stat-item:not(:last-child)::after {
  content: '';
  position: absolute;
  right: 0;
  top: 10%;
  height: 80%;
  width: 1px;
  background: rgba(255,255,255,0.08);
}

.stat-num {
  font-size: 36px;
  font-weight: 200;
  color: var(--tech);
  line-height: 1;
  margin-bottom: 8px;
}

.stat-label {
  font-size: 13px;
  color: var(--gray-1);
  letter-spacing: 1px;
}

/* Grids */
.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

/* Cards */
.card {
  padding: 32px 28px;
  background: rgba(255,255,255,0.02);
  border: 1px solid rgba(255,255,255,0.06);
  transition: all 0.4s var(--ease);
}

.card:hover {
  background: rgba(0, 212, 255, 0.03);
  border-color: rgba(0, 212, 255, 0.2);
  transform: translateY(-4px);
}

.card-icon {
  width: 56px;
  height: 56px;
  border: 1px solid rgba(0, 212, 255, 0.3);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  color: var(--tech);
  margin-bottom: 24px;
  background: rgba(0, 212, 255, 0.05);
}

.card h3 {
  font-size: 22px;
  font-weight: 300;
  color: var(--white);
  margin-bottom: 14px;
}

.card p {
  font-size: 15px;
  color: var(--gray-1);
  line-height: 1.7;
}

.card ul {
  margin-top: 18px;
}

.card ul li {
  font-size: 14px;
  color: var(--gray-1);
  padding: 8px 0;
  padding-left: 20px;
  position: relative;
  border-bottom: 1px solid rgba(255,255,255,0.04);
}

.card ul li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 6px;
  height: 6px;
  background: var(--tech);
  border-radius: 50%;
  opacity: 0.6;
}

.section-light .card {
  background: var(--white);
  border-color: rgba(10, 14, 39, 0.08);
  box-shadow: 0 4px 20px rgba(10, 14, 39, 0.04);
}

.section-light .card:hover {
  box-shadow: 0 12px 40px rgba(10, 14, 39, 0.08);
}

.section-light .card ul li {
  border-bottom-color: rgba(10, 14, 39, 0.06);
}

/* Pillar Cards */
.pillar-card {
  border-left: 1px solid rgba(255,255,255,0.08);
  border-top: none;
  border-right: none;
  border-bottom: none;
  padding-left: 36px;
}

.pillar-card:hover {
  border-left-color: var(--tech);
  transform: translateX(8px);
}

.section-light .pillar-card {
  border-left-color: rgba(10, 14, 39, 0.08);
}

.section-light .pillar-card:hover {
  border-left-color: var(--tech);
}

/* Service Cards */
.service-card {
  position: relative;
  overflow: hidden;
}

.service-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, var(--tech), var(--accent));
  opacity: 0.6;
}

.service-card h3 {
  font-size: 22px;
  font-weight: 600;
}

.service-card .value-list {
  margin-top: 20px;
}

.service-card .value-list li {
  padding-left: 24px;
  position: relative;
  font-size: 14px;
}

.service-card .value-list li::before {
  content: '→';
  left: 0;
  top: 6px;
  transform: none;
  width: auto;
  height: auto;
  background: none;
  border-radius: 0;
  color: var(--tech);
  opacity: 1;
  font-size: 12px;
}

.card-link.service-card {
  display: block;
  text-decoration: none;
  color: inherit;
  transition: transform 0.3s, border-color 0.3s, box-shadow 0.3s;
  cursor: pointer;
}

.card-link.service-card:hover {
  transform: translateY(-6px);
  border-color: rgba(0, 212, 255, 0.35);
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.22);
}

.card-link.service-card h3,
.card-link.service-card p,
.card-link.service-card li {
  color: inherit;
}

.active-card.service-card {
  border-color: rgba(0, 212, 255, 0.45);
  background: rgba(0, 212, 255, 0.04);
}

.active-card.service-card h3 {
  color: var(--tech);
}

/* Comparison */
.comparison {
  overflow: hidden;
  border: 1px solid rgba(255,255,255,0.08);
}

.comparison-row {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr;
  gap: 0;
  border-bottom: 1px solid rgba(255,255,255,0.06);
}

.comparison-row:last-child { border-bottom: none; }

.comparison-row.head {
  background: rgba(0, 212, 255, 0.08);
  font-weight: 500;
}

.comparison-row > div {
  padding: 20px 24px;
  font-size: 15px;
}

.comparison-row > div:not(:last-child) {
  border-right: 1px solid rgba(255,255,255,0.06);
}

.comparison-row .feature { color: var(--gray-1); }
.comparison-row .traditional { color: var(--gray-2); text-decoration: line-through; opacity: 0.7; }
.comparison-row .youlian { color: var(--white); }
.comparison-row .youlian strong { color: var(--tech); }

.section-light .comparison {
  border-color: rgba(10, 14, 39, 0.08);
}
.section-light .comparison-row {
  border-bottom-color: rgba(10, 14, 39, 0.06);
}
.section-light .comparison-row > div:not(:last-child) {
  border-right-color: rgba(10, 14, 39, 0.06);
}
.section-light .comparison-row .feature { color: var(--gray-2); }
.section-light .comparison-row .youlian { color: var(--ink); }

/* Process */
.process-steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.process-step {
  padding: 32px 24px;
  border: 1px solid rgba(255,255,255,0.08);
  text-align: center;
  transition: all 0.4s var(--ease);
}

.process-step:hover {
  border-color: var(--tech);
  background: rgba(0, 212, 255, 0.03);
}

.step-number {
  font-size: 56px;
  font-weight: 100;
  color: var(--tech);
  opacity: 0.5;
  margin-bottom: 12px;
  line-height: 1;
}

.process-step h3 {
  font-size: 20px;
  font-weight: 300;
  margin-bottom: 12px;
  color: var(--white);
}

.process-step p {
  font-size: 14px;
  color: var(--gray-1);
  line-height: 1.6;
}

.section-light .process-step {
  border-color: rgba(10, 14, 39, 0.08);
  background: var(--white);
}

.section-light .process-step:hover {
  border-color: var(--tech);
}

.section-light .process-step h3 { color: var(--ink); }

/* Global Region */
.region-card {
  padding: 48px 36px;
  background: linear-gradient(135deg, rgba(0,212,255,0.05) 0%, rgba(255,255,255,0.02) 100%);
  border: 1px solid rgba(0, 212, 255, 0.1);
  position: relative;
  overflow: hidden;
}

.region-card:hover {
  border-color: rgba(0, 212, 255, 0.3);
  transform: translateY(-4px);
}

.region-tag {
  display: inline-block;
  font-size: 11px;
  letter-spacing: 2px;
  text-transform: uppercase;
  padding: 6px 12px;
  border: 1px solid rgba(0, 212, 255, 0.3);
  color: var(--tech);
  margin-bottom: 20px;
}

.region-card h3 {
  font-size: 28px;
  font-weight: 300;
  margin-bottom: 16px;
  color: var(--white);
}

.region-card p {
  font-size: 15px;
  color: var(--gray-1);
  line-height: 1.7;
  margin-bottom: 24px;
}

.region-card a {
  color: var(--tech);
  font-size: 14px;
  letter-spacing: 1px;
  border-bottom: 1px solid rgba(0,212,255,0.3);
  padding-bottom: 2px;
}

.region-card a:hover {
  border-bottom-color: var(--tech);
}

.region-capabilities {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 24px;
}

.region-capabilities span {
  font-size: 12px;
  color: var(--gray-1);
  padding: 6px 12px;
  border: 1px solid rgba(255,255,255,0.08);
  background: rgba(255,255,255,0.02);
}

/* Team */
.team-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.team-card {
  padding: 32px;
  background: rgba(255,255,255,0.02);
  border: 1px solid rgba(255,255,255,0.06);
  transition: all 0.4s var(--ease);
}

.team-card:hover {
  border-color: rgba(0,212,255,0.2);
  transform: translateY(-4px);
}

.team-name {
  font-size: 22px;
  font-weight: 300;
  color: var(--white);
  margin-bottom: 4px;
}

.team-role {
  font-size: 13px;
  color: var(--tech);
  letter-spacing: 1px;
  margin-bottom: 16px;
}

.team-bio {
  font-size: 14px;
  color: var(--gray-1);
  line-height: 1.7;
}

.section-light .team-card {
  background: var(--white);
  border-color: rgba(10, 14, 39, 0.08);
}

.section-light .team-name { color: var(--ink); }

/* Data Assets */
.data-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.data-card {
  padding: 28px 24px;
  background: rgba(255,255,255,0.02);
  border: 1px solid rgba(255,255,255,0.06);
  text-align: center;
  transition: all 0.4s var(--ease);
}

/* AI 原生卡片整体升级：技术徽章 + 神经网络点阵背景 */
.ai-card {
  position: relative;
  overflow: hidden;
}
.ai-card::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: radial-gradient(rgba(0, 212, 255, 0.12) 1px, transparent 1px);
  background-size: 14px 14px;
  opacity: 0.6;
  pointer-events: none;
  z-index: 0;
}
.ai-card > * {
  position: relative;
  z-index: 1;
}

/* AI 卡片新布局：图标 + 序号标题 + 分隔线 + 核心技术/核心价值 */
.ai-card {
  padding: 24px;
  text-align: left;
}

.section-light .ai-card-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
}

.section-light .ai-card-icon {
  width: 32px;
  height: 32px;
  color: var(--tech);
  flex-shrink: 0;
}

.section-light .ai-card-icon svg {
  width: 100%;
  height: 100%;
}

.section-light .ai-card-header h3 {
  margin: 0;
  font-size: 20px;
  font-weight: 500;
  color: var(--ink);
  line-height: 1.3;
  text-align: left;
}

.section-light .ai-card-divider {
  width: 100%;
  height: 1px;
  background: rgba(0, 0, 0, 0.08);
  margin: 0 0 16px;
}

.section-light .ai-card-body {
  text-align: left;
}

.section-light .ai-card-body p {
  font-size: 14px;
  line-height: 1.7;
  color: var(--gray-1);
  margin-bottom: 14px;
  text-align: left;
}

.section-light .ai-card-body p:last-child {
  margin-bottom: 0;
}

.section-light .ai-card-body strong {
  color: var(--tech);
  font-weight: 600;
}

.ai-badge {
  position: absolute;
  top: 16px;
  right: 16px;
  z-index: 2;
  font-size: 11px;
  letter-spacing: 1px;
  color: var(--tech);
  background: rgba(0, 212, 255, 0.10);
  border: 1px solid rgba(0, 212, 255, 0.35);
  border-radius: 999px;
  padding: 5px 11px;
  line-height: 1;
  font-weight: 500;
}

.data-card:hover {
  border-color: rgba(0,212,255,0.2);
  transform: translateY(-4px);
}

.data-icon {
  width: 80px;
  height: 80px;
  margin: 0 auto 20px;
  color: var(--tech);
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0, 212, 255, 0.06);
  border: 1px solid rgba(0, 212, 255, 0.25);
  border-radius: 18px;
  box-shadow: 0 0 24px rgba(0, 212, 255, 0.12), inset 0 0 12px rgba(0, 212, 255, 0.06);
}

.data-icon svg {
  width: 36px;
  height: 36px;
  filter: drop-shadow(0 0 4px rgba(0, 212, 255, 0.4));
}

.section-light .data-icon {
  background: rgba(0, 212, 255, 0.08);
  border-color: rgba(0, 212, 255, 0.3);
  box-shadow: 0 0 24px rgba(0, 212, 255, 0.1), inset 0 0 12px rgba(0, 212, 255, 0.05);
}

.data-card .data-num {
  font-size: 48px;
  font-weight: 200;
  color: var(--tech);
  line-height: 1;
  margin-bottom: 10px;
}

.data-card .data-category {
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 2.5px;
  text-transform: uppercase;
  color: var(--tech);
  margin-bottom: 16px;
}

.data-card h3 {
  font-size: 22px;
  font-weight: 500;
  margin-bottom: 10px;
  color: var(--white);
}

.data-card p {
  font-size: 14px;
  color: var(--gray-1);
  margin-bottom: 24px;
}

.data-card .data-list {
  list-style: none;
  padding: 0;
  margin: 0;
  text-align: left;
  border-top: 1px solid rgba(255,255,255,0.06);
  padding-top: 20px;
}

.data-card .data-list li {
  font-size: 14px;
  color: var(--gray-1);
  padding-left: 20px;
  position: relative;
  margin-bottom: 10px;
  line-height: 1.5;
}

.data-card .data-list li:last-child {
  margin-bottom: 0;
}

.data-card .data-list li::before {
  content: "—";
  color: var(--tech);
  position: absolute;
  left: 0;
  top: 0;
}

.section-light .data-card {
  background: var(--white);
  border-color: rgba(10, 14, 39, 0.08);
}
.section-light .data-card h3 { color: var(--ink); }

/* Moat */
.moat-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0;
  border: 1px solid rgba(255,255,255,0.08);
}

.moat-item {
  padding: 48px 36px;
  border-right: 1px solid rgba(255,255,255,0.06);
  transition: all 0.4s var(--ease);
}

.moat-item:last-child { border-right: none; }

.moat-item:hover {
  background: rgba(0,212,255,0.03);
}

.moat-item .num {
  font-size: 18px;
  color: var(--tech);
  margin-bottom: 16px;
  letter-spacing: 2px;
}

.moat-item h3 {
  font-size: 22px;
  font-weight: 300;
  margin-bottom: 16px;
  color: var(--white);
}

.moat-item p {
  font-size: 15px;
  color: var(--gray-1);
  line-height: 1.7;
}

.section-light .moat-grid { border-color: rgba(10,14,39,0.08); }
.section-light .moat-item { border-right-color: rgba(10,14,39,0.06); }
.section-light .moat-item h3 { color: var(--ink); }

/* Milestones */
.timeline {
  position: relative;
  padding-left: 32px;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 1px;
  background: rgba(0,212,255,0.2);
}

.timeline-item {
  position: relative;
  padding-bottom: 36px;
}

.timeline-item::before {
  content: '';
  position: absolute;
  left: -38px;
  top: 4px;
  width: 10px;
  height: 10px;
  background: var(--tech);
  border-radius: 50%;
}

.timeline-year {
  font-size: 18px;
  color: var(--tech);
  margin-bottom: 8px;
}

.timeline-text {
  font-size: 15px;
  color: var(--gray-1);
  line-height: 1.7;
}

/* CTA */
.cta {
  background: linear-gradient(135deg, var(--ink) 0%, var(--ink-light) 100%);
  text-align: center;
  padding: 80px 0;
  position: relative;
  overflow: hidden;
}

.cta::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 50% 50%, rgba(0,212,255,0.08) 0%, transparent 60%);
}

.cta .container { position: relative; z-index: 2; }

.cta h2 {
  font-size: clamp(26px, 3.2vw, 40px);
  font-weight: 200;
  letter-spacing: -1px;
  margin-bottom: 16px;
  color: var(--white);
}

.cta p {
  font-size: 18px;
  color: var(--gray-1);
  max-width: 600px;
  margin: 0 auto 28px;
}

.cta-hint {
  font-size: 14px;
  color: var(--gray-1);
  opacity: 0.7;
  margin-top: 16px;
}

.cta-trust {
  display: flex;
  gap: 40px;
  justify-content: center;
  margin-top: 36px;
  font-size: 12px;
  color: var(--gray-1);
  letter-spacing: 2px;
  text-transform: uppercase;
}

/* Footer */
.footer {
  background: #050714;
  color: var(--gray-1);
  padding: 80px 0 32px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: 40px;
  margin-bottom: 56px;
}

.footer-brand {
  font-size: 24px;
  font-weight: 300;
  letter-spacing: 2.5px;
  color: var(--white);
  margin-bottom: 14px;
  text-transform: uppercase;
}

.footer-desc {
  font-size: 14px;
  line-height: 1.8;
  max-width: 320px;
}

.footer h4 {
  font-size: 13px;
  color: var(--white);
  letter-spacing: 1.5px;
  text-transform: uppercase;
  margin-bottom: 20px;
  font-weight: 400;
}

.footer ul li {
  margin-bottom: 12px;
}

.footer ul li a {
  font-size: 14px;
  color: var(--gray-1);
}

.footer ul li a:hover {
  color: var(--tech);
}

.footer-contact p {
  font-size: 14px;
  margin-bottom: 10px;
  line-height: 1.6;
}

.footer-contact .label {
  color: var(--gray-2);
  font-size: 12px;
  letter-spacing: 1px;
  text-transform: uppercase;
  margin-bottom: 4px;
}

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.06);
  padding-top: 28px;
  text-align: center;
  font-size: 12px;
  color: var(--gray-3);
}

.footer-bottom a {
  color: var(--gray-3);
  text-decoration: underline;
}

.footer-bottom a:hover {
  color: var(--white);
}

/* Responsive */

/* 大屏：≥1440px 内容更舒展 */
@media (min-width: 1440px) {
  .container { max-width: 1360px; }
  .section { padding: 120px 0; }
  .hero { padding: 140px 0 120px; }
  .cta { padding: 100px 0; }
}

@media (max-width: 1024px) {
  .container { padding: 0 28px; }
  .header .container { padding: 0 28px; }
  .section-title { white-space: normal; }
  .grid-3, .grid-4, .team-grid, .data-grid, .process-steps, .moat-grid { grid-template-columns: repeat(2, 1fr); }
  .grid-2 { grid-template-columns: 1fr; }
  .comparison-row { grid-template-columns: 1fr 1fr; }
  .comparison-row .feature { display: none; }
  .comparison-row.head { display: none; }
  .footer-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  .container { padding: 0 20px; }
  .header .container { padding: 0 20px; }
  .hero { min-height: auto; padding: 100px 0 80px; }
  /* hero h1 字号由 clamp() 流式接管，不再硬性指定 */
  .hero-subtitle { font-size: 16px; }
  .hero-btns { flex-direction: column; }
  .hero-btns .btn { width: 100%; }
  .hero-tag { margin-bottom: 32px; }
  .hero h1 { margin-bottom: 32px; }
  .hero-subtitle { margin-bottom: 40px; }
  .hero-btns { margin-bottom: 0; }
  .hero-line { max-width: 100%; margin-top: 48px; }
  .hero-scroll { display: none; }
  .section { padding: 72px 0; }
  .section-title { white-space: normal; }
  .page-header { padding: 100px 0 60px; }
  .page-header h1 { white-space: normal; }
  .services-hero { padding: 100px 0 80px; }
  .services-eyebrow { margin-bottom: 24px; transform: none; }
  .services-hero h1 { font-size: clamp(28px, 8vw, 40px); margin-bottom: 20px; letter-spacing: -1px; }
  .services-hero h1 em { font-weight: 300; }
  .services-hero .services-bottom-text { font-size: 15px; margin: 48px 0 56px 0; }
  .services-hero-line { max-width: 100%; margin-top: 56px; }
  .nav { display: none; position: fixed; top: 0; left: 0; right: 0; bottom: 0; background: var(--ink); flex-direction: column; align-items: center; justify-content: center; gap: 28px; z-index: 999; margin-right: 0; }
  .nav.open { display: flex; }
  .nav a { font-size: 16px; }
  .nav-dropdown { flex-direction: column; align-items: center; gap: 12px; }
  .nav-drop-toggle::before { display: none; }
  .nav-drop-menu {
    position: static;
    transform: none;
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    background: transparent;
    border: none;
    box-shadow: none;
    padding: 0;
    gap: 10px;
  }
  .nav-drop-menu::before { display: none; }
  .nav-drop-menu a { font-size: 14px; color: rgba(255,255,255,0.55); padding: 0; }
  .nav-drop-menu a.active,
  .nav-drop-menu a:hover { color: var(--tech); background: transparent; }
  .mobile-menu-btn { display: block; z-index: 1001; }
  .grid-3, .grid-4, .team-grid, .data-grid, .process-steps, .moat-grid, .footer-grid { grid-template-columns: 1fr; }
  .comparison-row { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .cta-trust { flex-direction: column; gap: 12px; }
  .chatbot-window { width: calc(100vw - 40px); right: 20px; bottom: 90px; }
  .chatbot-fab.chat-open {
    right: 20px;
    bottom: auto;
    top: 20px;
  }
  .logo-img { height: 30px; }
  .logo-title { font-size: 24px; }
}

/* 小屏：≤480px 细节收紧，避免拥挤与溢出 */
@media (max-width: 480px) {
  .container { padding: 0 16px; }
  .header .container { padding: 0 16px; }
  .hero { padding: 88px 0 64px; }
  .hero h1 { font-size: clamp(28px, 8.5vw, 36px); }
  .hero-subtitle { font-size: 15px; margin-bottom: 36px; }
  .hero-btns { gap: 12px; }
  .section { padding: 56px 0; }
  .section-title { font-size: clamp(20px, 6.5vw, 26px); }
  .section-subtitle { font-size: 15px; }
  .page-header { padding: 72px 0 44px; }
  .page-header h1 { font-size: clamp(26px, 8vw, 34px); }
  .cta { padding: 56px 0; }
  .cta h2 { font-size: 26px; }
  .cta p { font-size: 15px; }
  .footer { padding: 56px 0 28px; }
  .footer-grid { gap: 28px; }
  .footer-bottom { font-size: 11px; line-height: 1.7; }
}

/* =========================
   V2.1 Additions
   ========================= */

/* Hero readability */
.hero h1 {
  line-height: 1.16;
  letter-spacing: -0.5px;
}

.hero-subtitle {
  font-size: 20px;
  line-height: 1.75;
  letter-spacing: 0.3px;
}

/* Value proposition strip */
.value-strip {
  background: var(--ink-light);
  border-top: 1px solid rgba(255,255,255,0.05);
  border-bottom: 1px solid rgba(255,255,255,0.05);
  padding: 64px 0;
}

.value-strip .container {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 48px;
}

.value-strip-item {
  text-align: center;
}

.value-strip-item .icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 76px;
  height: 76px;
  margin: 0 auto 22px;
  border-radius: 20px;
  background: linear-gradient(135deg, rgba(0,212,255,0.14), rgba(0,212,255,0.03));
  border: 1px solid rgba(0,212,255,0.28);
  color: var(--tech);
  box-shadow: 0 0 26px rgba(0,212,255,0.16), inset 0 0 18px rgba(0,212,255,0.06);
  transition: all 0.4s var(--ease);
}

.value-strip-item .icon svg {
  width: 40px;
  height: 40px;
}

.value-strip-item:hover .icon {
  transform: translateY(-5px);
  border-color: rgba(0,212,255,0.55);
  box-shadow: 0 0 40px rgba(0,212,255,0.34), inset 0 0 22px rgba(0,212,255,0.12);
}

.value-strip-item h3 {
  font-size: 18px;
  font-weight: 300;
  color: var(--white);
  margin-bottom: 8px;
  letter-spacing: 1px;
}

.value-strip-item p {
  font-size: 14px;
  color: var(--gray-1);
  line-height: 1.6;
}

/* Scenario-based services */
.scenario-section {
  padding: 80px 0;
}

.scenario-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.scenario-card {
  padding: 40px 32px;
  border: 1px solid rgba(255,255,255,0.08);
  background: rgba(255,255,255,0.02);
  transition: all 0.4s var(--ease);
}

.scenario-card:hover {
  border-color: rgba(0,212,255,0.2);
  transform: translateY(-4px);
}

.scenario-tag {
  display: inline-block;
  font-size: 12px;
  color: var(--tech);
  letter-spacing: 1.5px;
  text-transform: uppercase;
  margin-bottom: 14px;
  padding: 6px 12px;
  border: 1px solid rgba(0,212,255,0.25);
  background: rgba(0,212,255,0.05);
}

.scenario-card h3 {
  font-size: 22px;
  font-weight: 300;
  color: var(--white);
  margin-bottom: 16px;
}

.scenario-card .pain {
  font-size: 15px;
  color: var(--accent-light);
  margin-bottom: 20px;
  line-height: 1.6;
}

.scenario-card .pain::before {
  content: '场景：';
  color: var(--accent-light);
}

.scenario-card h4 {
  font-size: 13px;
  color: var(--tech);
  letter-spacing: 1px;
  text-transform: uppercase;
  margin-bottom: 12px;
}

.scenario-card ul {
  margin-bottom: 20px;
}

.scenario-card ul li {
  font-size: 14px;
  color: var(--gray-1);
  padding: 6px 0;
  padding-left: 18px;
  position: relative;
  line-height: 1.6;
}

.scenario-card ul li::before {
  content: '→';
  position: absolute;
  left: 0;
  color: var(--tech);
  font-size: 11px;
}

.scenario-card .effect {
  padding: 16px;
  background: rgba(0,212,255,0.05);
  border-left: 2px solid var(--tech);
  font-size: 14px;
  color: var(--white);
  line-height: 1.7;
}

.scenario-card .effect strong {
  color: var(--tech);
  font-weight: 500;
}

/* Cleaner footer contact */
.footer-contact .contact-item {
  margin-bottom: 16px;
}

.footer-contact .wechat-id {
  display: inline-block;
  padding: 6px 12px;
  background: rgba(255,255,255,0.06);
  font-size: 14px;
  color: var(--white);
  letter-spacing: 0.5px;
  margin-top: 4px;
}

/* Chatbot */
.chatbot-fab {
  position: fixed;
  bottom: 20px;
  right: 20px;
  width: 140px;
  height: 140px;
  z-index: 1000;
  pointer-events: none;
}

.chatbot-fab button {
  position: absolute;
  bottom: 6px;
  right: 6px;
  width: 110px;
  height: 128px;
  border-radius: 50%;
  background: radial-gradient(circle at 50% 45%, rgba(0,212,255,0.18), rgba(0,212,255,0) 70%);
  border: none;
  cursor: pointer;
  box-shadow: 0 10px 32px rgba(0,212,255,0.4);
  transition: transform 0.3s var(--ease), box-shadow 0.3s var(--ease);
  display: flex;
  align-items: flex-end;
  justify-content: center;
  overflow: visible;
  pointer-events: auto;
  animation: robot-wander 10s ease-in-out infinite;
}

.chatbot-fab button svg.robot-avatar {
  width: 100px;
  height: 120px;
  overflow: visible;
  filter: drop-shadow(0 6px 10px rgba(0,0,0,0.25));
}

.chatbot-fab button:hover {
  animation-play-state: paused;
  transform: scale(1.06);
  box-shadow: 0 14px 44px rgba(0,212,255,0.55);
}

/* 对话框打开时：把机器人移到窗口左侧，避免被遮盖 */
.chatbot-fab.chat-open {
  right: 410px;
  bottom: 20px;
}
.chatbot-fab.chat-open button {
  animation: none;
}

.chatbot-fab-hint {
  position: absolute;
  bottom: -6px;
  left: 0;
  width: 100%;
  text-align: center;
  font-size: 12px;
  color: rgba(0, 212, 255, 0.9);
  letter-spacing: 0.5px;
  pointer-events: none;
  transition: opacity 0.25s ease, visibility 0.25s ease;
  animation: hintFloat 1.8s ease-in-out infinite;
}

@keyframes hintFloat {
  0%, 100% { transform: translateY(0); opacity: 1; }
  50% { transform: translateY(4px); opacity: 0.55; }
}

.chatbot-fab.chat-open .chatbot-fab-hint {
  animation: none;
  opacity: 0;
  visibility: hidden;
}

/* ===== 机器人肢体动作系统 ===== */
.robot-avatar .arm-left,
.robot-avatar .arm-right,
.robot-avatar .robot-head,
.robot-avatar .robot-body-group {
  transform-box: fill-box;
}
.robot-avatar .arm-left { transform-origin: top center; }
.robot-avatar .arm-right { transform-origin: top center; }
.robot-avatar .robot-head { transform-origin: bottom center; }
.robot-avatar .robot-body-group { transform-origin: center; }

/* 待机：呼吸 */
.robot-avatar .robot-body-group { animation: bot-breathe 3s ease-in-out infinite; }
@keyframes bot-breathe {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-2px); }
}

/* 欢迎 / 再见：挥手（左/右臂）— 加大摆手幅度 */
.robot-avatar.act-wave .arm-right { animation: bot-wave 0.7s ease-in-out 2; }
@keyframes bot-wave {
  0%, 100% { transform: rotate(0deg); }
  25% { transform: rotate(-62deg); }
  75% { transform: rotate(20deg); }
}
.robot-avatar.act-bye .arm-left { animation: bot-wave-l 0.7s ease-in-out 2; }
@keyframes bot-wave-l {
  0%, 100% { transform: rotate(0deg); }
  25% { transform: rotate(62deg); }
  75% { transform: rotate(-20deg); }
}

/* 认真听：侧头 */
.robot-avatar.act-listen .robot-head { animation: bot-tilt 1.4s ease-in-out infinite; }
@keyframes bot-tilt {
  0%, 100% { transform: rotate(0deg); }
  50% { transform: rotate(-12deg); }
}

/* 解答：身体前倾 + 双臂比划 */
.robot-avatar.act-answer .robot-body-group { animation: bot-lean 1s ease-in-out infinite; }
.robot-avatar.act-answer .arm-left { animation: bot-gesture-l 1s ease-in-out infinite; }
.robot-avatar.act-answer .arm-right { animation: bot-gesture-r 1s ease-in-out infinite; }
@keyframes bot-lean { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(3px); } }
@keyframes bot-gesture-l { 0%, 100% { transform: rotate(0deg); } 50% { transform: rotate(14deg); } }
@keyframes bot-gesture-r { 0%, 100% { transform: rotate(0deg); } 50% { transform: rotate(-14deg); } }

/* 感谢：点头 */
.robot-avatar.act-thanks .robot-head { animation: bot-nod 0.6s ease-in-out 2; }
@keyframes bot-nod { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(3px); } }

/* 祝贺：双臂高举 + 身体小跳 */
.robot-avatar.act-cheer .arm-left { animation: bot-cheer-l 0.6s ease-in-out 2; }
.robot-avatar.act-cheer .arm-right { animation: bot-cheer-r 0.6s ease-in-out 2; }
.robot-avatar.act-cheer .robot-body-group { animation: bot-cheer-bounce 0.6s ease-in-out 2; }
@keyframes bot-cheer-l {
  0%, 100% { transform: rotate(0deg); }
  50% { transform: rotate(160deg); }
}
@keyframes bot-cheer-r {
  0%, 100% { transform: rotate(0deg); }
  50% { transform: rotate(-160deg); }
}
@keyframes bot-cheer-bounce {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-3px); }
}


@keyframes robot-wander {
  0%, 100% { transform: translate(0, 0) rotate(0deg); }
  20% { transform: translate(-22px, -8px) rotate(-3deg); }
  40% { transform: translate(-8px, -18px) rotate(2deg); }
  60% { transform: translate(-26px, -10px) rotate(-2deg); }
  80% { transform: translate(-12px, -6px) rotate(1deg); }
}

.chatbot-window {
  position: fixed;
  bottom: 100px;
  right: 28px;
  width: 360px;
  max-height: 520px;
  background: var(--ink-light);
  border: 1px solid rgba(255,255,255,0.1);
  box-shadow: 0 20px 60px rgba(0,0,0,0.4);
  display: none;
  flex-direction: column;
  z-index: 1001;
  overflow: hidden;
}

.chatbot-window.open {
  display: flex;
}

.chatbot-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 20px;
  background: rgba(0,212,255,0.08);
  border-bottom: 1px solid rgba(255,255,255,0.06);
}

.chatbot-header span {
  font-size: 14px;
  color: var(--white);
  letter-spacing: 1px;
}

.chatbot-header button {
  background: none;
  border: none;
  color: var(--gray-1);
  font-size: 22px;
  cursor: pointer;
  line-height: 1;
}

.chatbot-header button:hover {
  color: var(--tech);
}

.chatbot-body {
  flex: 1;
  overflow-y: auto;
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.chatbot-message {
  padding: 12px 16px;
  border-radius: 0 12px 12px 12px;
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.06);
  color: rgba(255,255,255,0.85);
  font-size: 14px;
  line-height: 1.6;
  max-width: 90%;
}

.chatbot-options {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-top: 4px;
}

.chatbot-option {
  display: inline-block;
  text-align: left;
  padding: 10px 14px;
  background: rgba(0,212,255,0.06);
  border: 1px solid rgba(0,212,255,0.2);
  color: var(--tech);
  font-size: 13px;
  cursor: pointer;
  transition: all 0.2s;
  letter-spacing: 0.5px;
  text-decoration: none;
}

.chatbot-option:hover {
  background: rgba(0,212,255,0.12);
  transform: translateX(4px);
}

/* 聊天输入框（方案 C：接大模型） */
.chatbot-input {
  display: flex;
  gap: 8px;
  padding: 14px 16px;
  border-top: 1px solid rgba(255,255,255,0.08);
  background: rgba(0,0,0,0.18);
}

.chatbot-input input {
  flex: 1;
  min-width: 0;
  padding: 10px 12px;
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: 8px;
  color: var(--white);
  font-size: 13px;
  font-family: var(--font-primary);
}

.chatbot-input input::placeholder {
  color: var(--gray-3);
}

.chatbot-input input:focus {
  outline: none;
  border-color: var(--tech);
}

.chatbot-input button {
  flex: 0 0 auto;
  padding: 10px 16px;
  background: var(--tech);
  color: var(--ink);
  border: none;
  border-radius: 8px;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
}

.chatbot-input button:hover {
  background: var(--white);
}

.chatbot-message.user {
  align-self: flex-end;
  background: rgba(0,212,255,0.12);
  border-color: rgba(0,212,255,0.25);
  color: #fff;
  border-radius: 12px 0 12px 12px;
}

.chatbot-message.loading {
  display: flex;
  gap: 4px;
  align-items: center;
  background: rgba(255,255,255,0.04);
}

.chatbot-message.loading .dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--gray-2);
  animation: chatbot-bounce 1.2s infinite ease-in-out;
}

.chatbot-message.loading .dot:nth-child(2) { animation-delay: 0.2s; }
.chatbot-message.loading .dot:nth-child(3) { animation-delay: 0.4s; }

@keyframes chatbot-bounce {
  0%, 60%, 100% { transform: translateY(0); opacity: 0.4; }
  30% { transform: translateY(-4px); opacity: 1; }
}

.chatbot-form {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-top: 8px;
}

.chatbot-form input,
.chatbot-form textarea {
  padding: 10px 12px;
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.1);
  color: var(--white);
  font-size: 13px;
  font-family: var(--font-primary);
}

.chatbot-form input::placeholder,
.chatbot-form textarea::placeholder {
  color: var(--gray-3);
}

.chatbot-form input:focus,
.chatbot-form textarea:focus {
  outline: none;
  border-color: var(--tech);
}

.chatbot-form button {
  padding: 10px 14px;
  background: var(--tech);
  color: var(--ink);
  border: none;
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
}

.chatbot-form button:hover {
  background: var(--white);
}

.chatbot-note {
  margin-top: 12px;
  font-size: 12px;
  color: var(--gray-2);
  line-height: 1.6;
  padding: 12px;
  background: rgba(255,255,255,0.03);
  border: 1px solid rgba(255,255,255,0.05);
}

.chatbot-note strong {
  color: var(--tech);
}

#process,
#moat {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

#process .container {
  transform: translateY(-80px);
}

/* Scenario flow (pain → solution → result) */
.scenario-flow {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  position: relative;
}

.scenario-flow::before {
  content: '';
  position: absolute;
  top: 36px;
  left: 15%;
  right: 15%;
  height: 1px;
  background: linear-gradient(90deg, var(--accent), var(--tech));
  opacity: 0.3;
  z-index: 0;
}

.flow-step {
  position: relative;
  z-index: 1;
  padding: 32px 24px;
  border: 1px solid rgba(255,255,255,0.08);
  background: rgba(255,255,255,0.02);
  transition: all 0.4s var(--ease);
}

.flow-step:hover {
  border-color: rgba(0,212,255,0.2);
  transform: translateY(-4px);
}

.flow-step.solution {
  border-color: rgba(0,212,255,0.2);
  background: rgba(0,212,255,0.04);
}

.flow-step.result {
  border-color: rgba(0,212,255,0.15);
}

.flow-num {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  font-weight: 500;
  color: var(--tech);
  border: 1px solid rgba(0,212,255,0.3);
  background: var(--ink);
  margin-bottom: 20px;
}

.flow-step h3 {
  font-size: 18px;
  font-weight: 300;
  color: var(--white);
  margin-bottom: 14px;
  letter-spacing: 0.5px;
}

.flow-step p {
  font-size: 14px;
  color: var(--gray-1);
  line-height: 1.7;
}

.section-light .flow-step {
  background: var(--white);
  border-color: rgba(10, 14, 39, 0.08);
}

.section-light .flow-step.solution {
  border-color: rgba(0,212,255,0.3);
  background: rgba(0,212,255,0.04);
}

.section-light .flow-step h3 {
  color: var(--ink);
}

.section-light .flow-step p {
  color: var(--gray-2);
}

/* Core Advantage Cards */
/* 核心能力首屏：占满整屏，深色满屏后再滚动进入浅色部分 */
.core-advantage-section {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  position: relative;
}

.core-advantage-section .container {
  width: 100%;
}

/* 核心能力首屏标题区：整体向下移动约两行文字 */
.core-advantage-section .section-header {
  transform: translateY(60px);
  margin-bottom: 120px;
}

/* AI原生版块：标题向上移动一行，卡片向上移动两行 */
#native-ai .section-header {
  transform: translateY(-30px);
}

#native-ai .data-grid {
  transform: translateY(0);
}

/* 核心能力各 section 底部滚动提示：紧跟内容下方，留出足够间距 */
.core-advantage-section .hero-scroll,
#native-ai .hero-scroll,
#data-asset .hero-scroll {
  position: static;
  left: auto;
  bottom: auto;
  transform: none;
  margin-top: 40px;
}

/* 核心能力各子版块：占满整屏，深浅各自独立不混排 */
#native-ai,
#data-asset,
#moat {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  position: relative;
}

#native-ai .container,
#data-asset .container,
#moat .container {
  width: 100%;
}

.core-advantage-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.core-advantage-card {
  padding: 36px 28px;
  background: rgba(255,255,255,0.02);
  border: 1px solid rgba(255,255,255,0.06);
  text-align: center;
  transition: all 0.4s var(--ease);
}

.core-advantage-card:hover {
  background: rgba(0,212,255,0.03);
  border-color: rgba(0,212,255,0.2);
  transform: translateY(-4px);
}

.core-advantage-card .icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 76px;
  height: 76px;
  margin: 0 auto 22px;
  border-radius: 20px;
  background: linear-gradient(135deg, rgba(0,212,255,0.14), rgba(0,212,255,0.03));
  border: 1px solid rgba(0,212,255,0.28);
  color: var(--tech);
  box-shadow: 0 0 26px rgba(0,212,255,0.16), inset 0 0 18px rgba(0,212,255,0.06);
  transition: all 0.4s var(--ease);
}

.core-advantage-card:hover .icon {
  transform: translateY(-5px);
  border-color: rgba(0,212,255,0.55);
  box-shadow: 0 0 40px rgba(0,212,255,0.34), inset 0 0 22px rgba(0,212,255,0.12);
}

.core-advantage-card .icon svg {
  width: 40px;
  height: 40px;
}

.core-advantage-card h3 {
  font-size: 20px;
  font-weight: 300;
  color: var(--white);
  margin-bottom: 12px;
  letter-spacing: 1px;
}

.core-advantage-card p {
  font-size: 15px;
  color: var(--gray-1);
  line-height: 1.7;
}

@media (max-width: 1024px) {
  .value-strip .container { grid-template-columns: 1fr; gap: 32px; }
  .core-advantage-grid { grid-template-columns: repeat(2, 1fr); }
  .scenario-grid { grid-template-columns: 1fr; }
  .scenario-flow { grid-template-columns: 1fr; }
  .scenario-flow::before { display: none; }
}

@media (max-width: 768px) {
  .core-advantage-grid { grid-template-columns: 1fr; }
}

/* ===========================
   海外资源页 · 全球资源地图
   =========================== */
.overseas-section {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 100px 0 40px;
  background: linear-gradient(135deg, var(--ink) 0%, var(--ink-light) 50%, var(--ink-lighter) 100%);
}

.overseas-section .section-header {
  margin-bottom: 24px;
}

.overseas-section .section-title {
  font-size: clamp(22px, 2.2vw, 30px);
  margin-bottom: 0;
}

.world-map-wrap {
  width: 100%;
  max-width: 900px;
  margin: 0 auto 28px;
  position: relative;
  border: 1px solid rgba(0,212,255,0.1);
  background: #05070f;
  border-radius: 12px;
  padding: 0;
  overflow: hidden;
  box-shadow: inset 0 0 60px rgba(0,212,255,0.04);
}

.world-map-bg {
  width: 100%;
  height: auto;
  display: block;
}

.map-markers-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
}

.map-marker {
  position: absolute;
  width: 12px;
  height: 12px;
  transform: translate(-50%, -50%);
  pointer-events: auto;
  cursor: pointer;
  z-index: 2;
}

.map-marker-dot {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 10px;
  height: 10px;
  margin: -5px 0 0 -5px;
  border-radius: 50%;
  background: var(--tech);
  box-shadow: 0 0 12px rgba(0,212,255,0.8), 0 0 24px rgba(0,212,255,0.4);
  transition: all 0.3s var(--ease);
  z-index: 2;
}

.map-marker:hover .map-marker-dot {
  background: var(--tech-light);
  transform: scale(1.4);
  box-shadow: 0 0 18px rgba(0,212,255,1), 0 0 36px rgba(0,212,255,0.6);
}

.map-marker-pulse {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 10px;
  height: 10px;
  margin: -5px 0 0 -5px;
  border-radius: 50%;
  background: var(--tech);
  opacity: 0.6;
  transform-origin: center;
  animation: markerPulse 2.4s ease-out infinite;
  z-index: 1;
}

.map-marker:nth-child(2n) .map-marker-pulse { animation-delay: 0.4s; }
.map-marker:nth-child(3n) .map-marker-pulse { animation-delay: 0.8s; }
.map-marker:nth-child(4n) .map-marker-pulse { animation-delay: 1.2s; }

@keyframes markerPulse {
  0% { transform: translate(-50%, -50%) scale(1); opacity: 0.7; }
  70% { transform: translate(-50%, -50%) scale(3.2); opacity: 0; }
  100% { transform: translate(-50%, -50%) scale(3.2); opacity: 0; }
}

.map-marker-label {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  font-size: 12px;
  font-weight: 500;
  color: var(--white);
  letter-spacing: 0.5px;
  text-shadow: 0 1px 8px rgba(0,0,0,0.9);
  white-space: nowrap;
  opacity: 0.95;
  transition: all 0.3s var(--ease);
  z-index: 3;
}

.map-marker-label.label-right {
  left: 16px;
}

.map-marker-label.label-left {
  right: 16px;
}

.map-marker:hover .map-marker-label {
  color: var(--tech-light);
  text-shadow: 0 0 12px rgba(0,212,255,0.6);
}

.region-intro {
  max-width: 1100px;
  margin: 0 auto;
}

.region-intro-text {
  text-align: center;
  max-width: 900px;
  margin: 0 auto;
}

.region-intro-text p {
  font-size: 14px;
  color: var(--gray-1);
  line-height: 1.7;
}

@media (max-width: 1024px) {
  .world-map-wrap { padding: 18px; }
  .map-marker-label { font-size: 10px; }
}

@media (max-width: 768px) {
  .overseas-section { padding: 100px 0 60px; }
  .overseas-section .section-header { margin-bottom: 32px; }
  .world-map-wrap { padding: 12px; margin-bottom: 32px; }
  .map-marker-label { display: none; }
}