/* =========================================
   五华图灵科技 · 明亮多彩 · AI 科技美学
   ========================================= */

:root {
  --bg: #ffffff;
  --bg-soft: #f7f8fc;
  --bg-gradient: #fafbff;
  --border: #eef1f8;
  --border-2: #e5e9f2;
  --text: #0a0e1c;
  --text-2: #4b5670;
  --text-3: #8b93a7;
  --text-4: #b8c0d0;

  --purple: #8b5cf6;
  --pink: #ec4899;
  --blue: #3b82f6;
  --cyan: #06b6d4;
  --orange: #fb923c;
  --red: #f43f5e;
  --green: #10b981;
  --teal: #14b8a6;
  --yellow: #fbbf24;
  --indigo: #6366f1;

  --grad-purple: linear-gradient(135deg, #8b5cf6 0%, #ec4899 100%);
  --grad-blue: linear-gradient(135deg, #3b82f6 0%, #06b6d4 100%);
  --grad-cyan: linear-gradient(135deg, #06b6d4 0%, #3b82f6 100%);
  --grad-orange: linear-gradient(135deg, #fb923c 0%, #f43f5e 100%);
  --grad-green: linear-gradient(135deg, #10b981 0%, #14b8a6 100%);
  --grad-pink: linear-gradient(135deg, #ec4899 0%, #fb923c 100%);
  --grad-rainbow: linear-gradient(120deg, #8b5cf6 0%, #ec4899 30%, #fb923c 60%, #fbbf24 100%);
  --grad-ai: linear-gradient(135deg, #6366f1 0%, #8b5cf6 50%, #ec4899 100%);
  --grad-orange-pink: linear-gradient(135deg, #fb923c 0%, #ec4899 100%);
  --grad-blue-cyan: linear-gradient(135deg, #3b82f6 0%, #06b6d4 100%);
  --grad-purple-pink: linear-gradient(135deg, #8b5cf6 0%, #ec4899 100%);

  --shadow-sm: 0 2px 8px rgba(15, 23, 42, 0.04);
  --shadow-md: 0 10px 30px rgba(15, 23, 42, 0.07);
  --shadow-lg: 0 24px 60px rgba(15, 23, 42, 0.12);
  --shadow-color: 0 20px 50px -20px;

  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
}

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

html { scroll-behavior: smooth; }

body {
  font-family: "SF Pro Display", -apple-system, BlinkMacSystemFont, "PingFang SC",
               "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  color: var(--text);
  line-height: 1.65;
  background: var(--bg);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; transition: color .2s; }
ul { list-style: none; }

.container { max-width: 1240px; margin: 0 auto; padding: 0 28px; }

/* ============ 渐变文字 ============ */

.gradient-ai {
  background: var(--grad-ai);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.gradient-rainbow {
  background: var(--grad-rainbow);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.gradient-purple-pink {
  background: var(--grad-purple);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.gradient-blue-cyan {
  background: var(--grad-blue);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.gradient-orange-pink {
  background: var(--grad-orange-pink);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* ============ 按钮 ============ */

.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 12px 22px; border-radius: 999px;
  font-size: 14px; font-weight: 500;
  border: 1px solid transparent; cursor: pointer;
  transition: all .3s var(--ease);
  white-space: nowrap; font-family: inherit;
}
.btn-lg { padding: 15px 30px; font-size: 15px; gap: 10px; }
.btn-block { width: 100%; justify-content: center; }

.btn-primary {
  background: var(--grad-ai);
  color: #fff;
  font-weight: 600;
  box-shadow: 0 8px 24px -6px rgba(139, 92, 246, 0.5);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 14px 34px -6px rgba(236, 72, 153, 0.55);
  filter: brightness(1.05);
}
.btn-primary svg { transition: transform .3s; }
.btn-primary:hover svg { transform: translateX(4px); }

.btn-outline {
  background: #fff;
  color: var(--text);
  border: 1.5px solid var(--border-2);
}
.btn-outline:hover {
  border-color: var(--purple);
  color: var(--purple);
  transform: translateY(-2px);
}

/* ============ 导航 ============ */

.navbar {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  background: rgba(255, 255, 255, 0.75);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border-bottom: 1px solid transparent;
  transition: all .3s var(--ease);
}
.navbar.scrolled {
  background: rgba(255, 255, 255, 0.92);
  border-bottom-color: var(--border);
  box-shadow: 0 1px 0 rgba(0,0,0,0.02);
}
.nav-inner {
  display: flex; align-items: center; justify-content: space-between;
  height: 72px;
}

.logo {
  display: flex; align-items: center; gap: 12px;
  font-weight: 700; color: var(--text);
}
.logo-mark {
  position: relative;
  width: 38px; height: 38px;
  display: inline-flex; align-items: center; justify-content: center;
  border-radius: 10px;
  background: var(--grad-ai);
  color: #fff;
  font-size: 13px; font-weight: 800; letter-spacing: .5px;
  box-shadow: 0 6px 16px -4px rgba(139, 92, 246, 0.5);
}
.logo-img {
  height: 44px;
  width: auto;
  display: block;
  object-fit: contain;
}
.footer-brand .logo-img {
  height: 48px;
  filter: brightness(1.05);
}
.logo-text { display: flex; flex-direction: column; line-height: 1.1; }
.logo-cn { font-size: 15px; font-weight: 700; color: var(--text); }
.logo-en { font-size: 9px; letter-spacing: 2px; color: var(--text-3); font-weight: 500; margin-top: 3px; }

.nav-menu { display: flex; gap: 4px; }
.nav-menu a {
  padding: 8px 16px; border-radius: 999px;
  font-size: 14px; color: var(--text-2); font-weight: 500;
  transition: all .25s;
}
.nav-menu a:hover {
  color: var(--purple);
  background: rgba(139, 92, 246, 0.08);
}

.nav-toggle {
  display: none; flex-direction: column; gap: 5px;
  background: none; border: none; cursor: pointer; padding: 8px;
}
.nav-toggle span {
  width: 22px; height: 1.5px; background: var(--text);
  transition: all .3s;
}

/* ============ HERO ============ */

.hero {
  position: relative; min-height: 90vh;
  padding: 130px 0 80px;
  background: var(--bg-gradient);
  overflow: hidden;
}

.hero-blob {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: .55;
  pointer-events: none;
}
.hero-blob-1 {
  top: -120px; right: -100px;
  width: 500px; height: 500px;
  background: radial-gradient(circle, #c4b5fd 0%, #f9a8d4 50%, transparent 80%);
  animation: blobFloat1 18s ease-in-out infinite;
}
.hero-blob-2 {
  bottom: -150px; left: -100px;
  width: 550px; height: 550px;
  background: radial-gradient(circle, #93c5fd 0%, #67e8f9 50%, transparent 80%);
  animation: blobFloat2 22s ease-in-out infinite;
}
.hero-blob-3 {
  top: 30%; left: 40%;
  width: 400px; height: 400px;
  background: radial-gradient(circle, #fed7aa 0%, #fbcfe8 50%, transparent 80%);
  animation: blobFloat3 20s ease-in-out infinite;
  opacity: .35;
}
@keyframes blobFloat1 {
  0%, 100% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(-60px, 60px) scale(1.1); }
}
@keyframes blobFloat2 {
  0%, 100% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(80px, -40px) scale(1.15); }
}
@keyframes blobFloat3 {
  0%, 100% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(-40px, -50px) scale(0.9); }
}

.hero-inner {
  position: relative; z-index: 2;
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 60px;
  align-items: center;
}

.hero-content { max-width: 620px; }

.hero-badge {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 7px 16px;
  border-radius: 999px;
  background: rgba(139, 92, 246, 0.08);
  border: 1px solid rgba(139, 92, 246, 0.2);
  font-size: 12px;
  color: var(--purple);
  font-weight: 600;
  letter-spacing: .3px;
  margin-bottom: 28px;
}
.badge-icon {
  background: var(--grad-ai);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  font-size: 14px;
}

.hero-title {
  font-size: clamp(40px, 6vw, 72px);
  font-weight: 800;
  line-height: 1.08;
  letter-spacing: -2px;
  color: var(--text);
  margin-bottom: 28px;
}
.title-row { display: block; }

.hero-subtitle {
  font-size: 17px;
  color: var(--text-2);
  line-height: 1.8;
  margin-bottom: 36px;
  max-width: 560px;
}

.hero-actions {
  display: flex; gap: 12px; flex-wrap: wrap;
  margin-bottom: 40px;
}

.hero-chips {
  display: flex; gap: 8px; flex-wrap: wrap;
}
.chip {
  padding: 6px 14px; border-radius: 999px;
  font-size: 12px; font-weight: 500;
  border: 1px solid var(--border-2);
  background: #fff;
  transition: all .25s;
}
.chip:hover { transform: translateY(-2px); }
.chip-purple { color: var(--purple); border-color: #e9d5ff; background: #faf5ff; }
.chip-blue { color: var(--blue); border-color: #bfdbfe; background: #eff6ff; }
.chip-orange { color: var(--orange); border-color: #fed7aa; background: #fff7ed; }
.chip-green { color: var(--green); border-color: #a7f3d0; background: #ecfdf5; }
.chip-pink { color: var(--pink); border-color: #fbcfe8; background: #fdf2f8; }

/* Hero 右侧视觉 */
.hero-visual {
  position: relative;
  width: 100%;
  aspect-ratio: 1 / 1;
  max-width: 520px;
  margin: 0 auto;
}

/* 中央 AI 核心 */
.hero-center {
  position: absolute;
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  width: 260px; height: 260px;
  display: flex; align-items: center; justify-content: center;
  z-index: 2;
}
.neuron-ring {
  position: absolute; inset: 0;
  border-radius: 50%;
  border: 2px dashed rgba(139, 92, 246, 0.35);
  animation: spin 30s linear infinite;
}
.neuron-ring-2 {
  inset: 28px;
  border: 2px dotted rgba(236, 72, 153, 0.3);
  animation: spin 20s linear infinite reverse;
}
@keyframes spin { to { transform: rotate(360deg); } }
.neuron-core {
  width: 170px; height: 170px;
  border-radius: 50%;
  background: var(--grad-ai);
  display: flex; align-items: center; justify-content: center;
  box-shadow: 0 25px 70px -10px rgba(139, 92, 246, 0.55),
              0 0 0 10px rgba(255,255,255,.9),
              0 0 0 11px rgba(139, 92, 246, 0.1);
  position: relative;
  animation: coreGlow 3s ease-in-out infinite;
}
.neuron-inner {
  color: #fff;
  font-size: 56px;
  font-weight: 800;
  letter-spacing: -1px;
}
@keyframes coreGlow {
  0%, 100% { box-shadow: 0 25px 70px -10px rgba(139, 92, 246, 0.55), 0 0 0 10px rgba(255,255,255,.9), 0 0 0 11px rgba(139, 92, 246, 0.1); }
  50% { box-shadow: 0 25px 80px -10px rgba(236, 72, 153, 0.6), 0 0 0 10px rgba(255,255,255,.9), 0 0 0 11px rgba(236, 72, 153, 0.15); }
}

/* 轨道容器：环绕中心 AI 核心缓慢旋转 */
.orbit {
  position: absolute;
  inset: 0;
  animation: orbitSpin 40s linear infinite;
  z-index: 3;
}
@keyframes orbitSpin {
  to { transform: rotate(360deg); }
}
.orbit:hover { animation-play-state: paused; }

/* 轨道上的每一项：用 CSS 变量 --a 定位在圆周角度上 */
.orbit-item {
  position: absolute;
  top: 50%; left: 50%;
  width: 0; height: 0;
  /* 定位到圆周上：旋转到角度 --a，再往外推 --r 距离 */
  transform: rotate(var(--a)) translate(var(--r)) rotate(calc(-1 * var(--a)));
}
/* 5 张卡片均匀分布在圆周上（360/5 = 72°） */
.orbit-1 { --a: -90deg; --r: 230px; }
.orbit-2 { --a: -18deg; --r: 230px; }
.orbit-3 { --a: 54deg;  --r: 230px; }
.orbit-4 { --a: 126deg; --r: 230px; }
.orbit-5 { --a: 198deg; --r: 230px; }

/* 卡片本体：反向旋转让内容始终正向朝上 + 轻微上下浮动 */
.hero-card {
  position: absolute;
  transform: translate(-50%, -50%);
  left: 0; top: 0;
  background: #fff;
  border-radius: 16px;
  padding: 14px 16px;
  box-shadow: 0 15px 40px -8px rgba(15, 23, 42, 0.14);
  border: 1px solid var(--border);
  width: 150px;
  animation: cardCounterSpin 40s linear infinite, floatCard 5s ease-in-out infinite;
}
@keyframes cardCounterSpin {
  to { transform: translate(-50%, -50%) rotate(-360deg); }
}
@keyframes floatCard {
  0%, 100% { box-shadow: 0 15px 40px -8px rgba(15, 23, 42, 0.14); }
  50% { box-shadow: 0 22px 55px -10px rgba(139, 92, 246, 0.28); }
}
.orbit-1 .hero-card { animation-delay: 0s, 0s; }
.orbit-2 .hero-card { animation-delay: 0s, -1s; }
.orbit-3 .hero-card { animation-delay: 0s, -2s; }
.orbit-4 .hero-card { animation-delay: 0s, -3s; }
.orbit-5 .hero-card { animation-delay: 0s, -4s; }

.hc-icon {
  width: 34px; height: 34px;
  border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
  color: #fff; margin-bottom: 8px;
}
.hc-purple { background: var(--grad-purple); box-shadow: 0 8px 18px -6px rgba(139, 92, 246, 0.5); }
.hc-orange { background: var(--grad-orange); box-shadow: 0 8px 18px -6px rgba(251, 146, 60, 0.5); }
.hc-pink   { background: var(--grad-pink);   box-shadow: 0 8px 18px -6px rgba(236, 72, 153, 0.5); }
.hc-blue   { background: var(--grad-blue);   box-shadow: 0 8px 18px -6px rgba(59, 130, 246, 0.5); }
.hc-green  { background: var(--grad-green);  box-shadow: 0 8px 18px -6px rgba(16, 185, 129, 0.5); }

.hc-label {
  font-family: "SF Mono", Menlo, monospace;
  font-size: 9px; letter-spacing: 1.5px;
  color: var(--text-3);
  margin-bottom: 2px;
}
.hc-value {
  font-size: 14px; font-weight: 700;
  color: var(--text);
  margin-bottom: 2px;
  letter-spacing: -.3px;
}
.hc-sub {
  font-size: 10.5px;
  color: var(--text-3);
}

/* 大圆轨道虚线（装饰） */
.hero-visual::before {
  content: '';
  position: absolute;
  top: 50%; left: 50%;
  width: 460px; height: 460px;
  transform: translate(-50%, -50%);
  border-radius: 50%;
  border: 1px dashed rgba(139, 92, 246, 0.18);
  pointer-events: none;
  z-index: 1;
}

/* ============ 通用 section ============ */

.section {
  position: relative;
  padding: 100px 0;
}

.section-head {
  text-align: center;
  max-width: 820px;
  margin: 0 auto 64px;
}
.section-num {
  display: inline-block;
  padding: 5px 14px;
  border-radius: 999px;
  background: rgba(139, 92, 246, 0.08);
  border: 1px solid rgba(139, 92, 246, 0.15);
  color: var(--purple);
  font-family: "SF Mono", Menlo, monospace;
  font-size: 11px; letter-spacing: 1.5px;
  margin-bottom: 20px;
  font-weight: 600;
}
.section-title {
  font-size: clamp(30px, 4vw, 48px);
  font-weight: 800;
  line-height: 1.18;
  letter-spacing: -1.2px;
  color: var(--text);
  margin-bottom: 16px;
}
.section-title-left { text-align: left; }
.section-sub {
  font-size: 16px;
  color: var(--text-2);
  line-height: 1.75;
  max-width: 620px;
  margin: 0 auto;
}

/* ============ AI 能力 ============ */

.ai-capabilities {
  background: linear-gradient(180deg, #fafbff 0%, #ffffff 100%);
  padding: 90px 0 100px;
}

.ai-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 20px;
}

.ai-card {
  position: relative;
  padding: 32px 28px 28px;
  border-radius: 20px;
  background: #fff;
  border: 1px solid var(--border);
  transition: all .4s var(--ease);
  overflow: hidden;
}
.ai-card::before {
  content: ''; position: absolute;
  top: 0; left: 0; right: 0;
  height: 4px;
  opacity: .9;
}
.ai-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: transparent;
}
.ai-icon-wrap {
  width: 52px; height: 52px;
  border-radius: 14px;
  display: flex; align-items: center; justify-content: center;
  color: #fff;
  margin-bottom: 20px;
}
.ai-icon-wrap svg { width: 24px; height: 24px; }

.ai-purple::before { background: var(--grad-purple); }
.ai-purple .ai-icon-wrap { background: var(--grad-purple); box-shadow: var(--shadow-color) rgba(139, 92, 246, 0.45); }

.ai-blue::before { background: var(--grad-blue); }
.ai-blue .ai-icon-wrap { background: var(--grad-blue); box-shadow: var(--shadow-color) rgba(59, 130, 246, 0.45); }

.ai-pink::before { background: var(--grad-pink); }
.ai-pink .ai-icon-wrap { background: var(--grad-pink); box-shadow: var(--shadow-color) rgba(236, 72, 153, 0.45); }

.ai-orange::before { background: var(--grad-orange); }
.ai-orange .ai-icon-wrap { background: var(--grad-orange); box-shadow: var(--shadow-color) rgba(251, 146, 60, 0.45); }

.ai-green::before { background: var(--grad-green); }
.ai-green .ai-icon-wrap { background: var(--grad-green); box-shadow: var(--shadow-color) rgba(16, 185, 129, 0.45); }

.ai-cyan::before { background: var(--grad-cyan); }
.ai-cyan .ai-icon-wrap { background: var(--grad-cyan); box-shadow: var(--shadow-color) rgba(6, 182, 212, 0.45); }

.ai-card h3 {
  font-size: 19px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 10px;
  letter-spacing: -.3px;
}
.ai-card p {
  font-size: 14px;
  color: var(--text-2);
  line-height: 1.7;
  margin-bottom: 18px;
}
.ai-tags {
  display: flex; gap: 6px; flex-wrap: wrap;
}
.ai-tags span {
  padding: 4px 10px;
  border-radius: 6px;
  font-size: 11px;
  font-weight: 500;
  background: var(--bg-soft);
  color: var(--text-2);
}

/* ============ 业务领域 ============ */

.services { background: #fff; }

.service-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 20px;
}

.service-card {
  position: relative;
  padding: 30px 28px;
  border-radius: 20px;
  background: #fff;
  border: 1px solid var(--border);
  transition: all .4s var(--ease);
  overflow: hidden;
}
.service-card::after {
  content: ''; position: absolute;
  inset: 0; border-radius: 20px;
  pointer-events: none;
  opacity: 0; transition: opacity .4s;
  background: linear-gradient(180deg, transparent 60%, currentColor 120%);
  mix-blend-mode: multiply;
  color: transparent;
}
.service-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: transparent;
}

.service-head {
  display: flex; align-items: center; justify-content: space-between;
  margin-bottom: 22px;
}
.service-icon {
  width: 52px; height: 52px;
  border-radius: 14px;
  background-repeat: no-repeat;
  background-position: center;
  background-size: 24px 24px;
  color: #fff;
  transition: transform .4s;
}
.service-card:hover .service-icon { transform: scale(1.08) rotate(-5deg); }

.grad-purple .service-icon { background-color: #faf5ff; background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%238b5cf6' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Crect x='4' y='4' width='16' height='16' rx='2'/%3E%3Crect x='9' y='9' width='6' height='6'/%3E%3Cpath d='M9 1v3M15 1v3M9 20v3M15 20v3M20 9h3M20 14h3M1 9h3M1 14h3'/%3E%3C/svg%3E"); }
.grad-blue .service-icon { background-color: #eff6ff; background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%233b82f6' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='16 18 22 12 16 6'/%3E%3Cpolyline points='8 6 2 12 8 18'/%3E%3C/svg%3E"); }
.grad-cyan .service-icon { background-color: #ecfeff; background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%2306b6d4' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cellipse cx='12' cy='5' rx='9' ry='3'/%3E%3Cpath d='M21 12c0 1.66-4 3-9 3s-9-1.34-9-3'/%3E%3Cpath d='M3 5v14c0 1.66 4 3 9 3s9-1.34 9-3V5'/%3E%3C/svg%3E"); }
.grad-orange .service-icon { background-color: #fff7ed; background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23fb923c' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M3 11l18-5v12L3 14v-3z'/%3E%3Cpath d='M11.6 16.8a3 3 0 1 1-5.8-1.6'/%3E%3C/svg%3E"); }
.grad-green .service-icon { background-color: #ecfdf5; background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%2310b981' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Crect x='2' y='3' width='20' height='14' rx='2'/%3E%3Cline x1='8' y1='21' x2='16' y2='21'/%3E%3Cline x1='12' y1='17' x2='12' y2='21'/%3E%3C/svg%3E"); }
.grad-pink .service-icon { background-color: #fdf2f8; background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23ec4899' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M21 15a2 2 0 0 1-2 2H7l-4 4V5a2 2 0 0 1 2-2h14a2 2 0 0 1 2 2z'/%3E%3C/svg%3E"); }

.card-num {
  font-family: "SF Mono", Menlo, monospace;
  font-size: 11px; font-weight: 700;
  letter-spacing: 1.5px;
  color: var(--text-4);
}

.service-card h3 {
  font-size: 19px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 10px;
  letter-spacing: -.3px;
}
.service-card p {
  font-size: 14px;
  color: var(--text-2);
  line-height: 1.7;
  margin-bottom: 18px;
}
.service-tags {
  display: flex; gap: 6px; flex-wrap: wrap;
}
.service-tags li {
  padding: 4px 11px;
  border-radius: 999px;
  background: var(--bg-soft);
  color: var(--text-2);
  font-size: 11px;
  font-weight: 500;
}

.grad-purple:hover { background: linear-gradient(180deg, #fff 0%, #faf5ff 100%); box-shadow: var(--shadow-color) rgba(139, 92, 246, 0.25); }
.grad-blue:hover { background: linear-gradient(180deg, #fff 0%, #eff6ff 100%); box-shadow: var(--shadow-color) rgba(59, 130, 246, 0.25); }
.grad-cyan:hover { background: linear-gradient(180deg, #fff 0%, #ecfeff 100%); box-shadow: var(--shadow-color) rgba(6, 182, 212, 0.25); }
.grad-orange:hover { background: linear-gradient(180deg, #fff 0%, #fff7ed 100%); box-shadow: var(--shadow-color) rgba(251, 146, 60, 0.25); }
.grad-green:hover { background: linear-gradient(180deg, #fff 0%, #ecfdf5 100%); box-shadow: var(--shadow-color) rgba(16, 185, 129, 0.25); }
.grad-pink:hover { background: linear-gradient(180deg, #fff 0%, #fdf2f8 100%); box-shadow: var(--shadow-color) rgba(236, 72, 153, 0.25); }

.grad-purple .service-tags li { background: #faf5ff; color: var(--purple); }
.grad-blue .service-tags li { background: #eff6ff; color: var(--blue); }
.grad-cyan .service-tags li { background: #ecfeff; color: var(--cyan); }
.grad-orange .service-tags li { background: #fff7ed; color: var(--orange); }
.grad-green .service-tags li { background: #ecfdf5; color: var(--green); }
.grad-pink .service-tags li { background: #fdf2f8; color: var(--pink); }

/* ============ 关于 ============ */

.about {
  background: linear-gradient(180deg, #ffffff 0%, #f7f8fc 100%);
}
.about-grid {
  display: grid;
  grid-template-columns: 1.05fr 1fr;
  gap: 72px;
  align-items: center;
}

.quote {
  padding: 20px 24px;
  border-radius: 14px;
  background: linear-gradient(135deg, rgba(139, 92, 246, 0.04), rgba(236, 72, 153, 0.04));
  border: 1px solid rgba(139, 92, 246, 0.12);
  border-left: 3px solid var(--purple);
  margin: 28px 0 28px;
  position: relative;
}
.quote-mark {
  position: absolute;
  top: -16px; left: 18px;
  font-size: 70px;
  color: var(--purple);
  font-family: Georgia, serif;
  line-height: 1;
  opacity: .25;
}
.quote p {
  font-style: italic;
  font-size: 14px;
  color: var(--text);
  line-height: 1.7;
  margin-bottom: 8px;
}
.quote footer {
  font-size: 11px;
  color: var(--purple);
  font-weight: 600;
  letter-spacing: 1.5px;
}

.about-desc {
  font-size: 15px;
  line-height: 1.8;
  color: var(--text-2);
  margin-bottom: 14px;
}
.about-desc strong {
  color: var(--text);
  font-weight: 700;
  background: linear-gradient(180deg, transparent 70%, rgba(139, 92, 246, 0.25) 70%);
  padding: 0 2px;
}

.about-highlights {
  display: flex; flex-direction: column;
  gap: 10px;
  margin-top: 32px;
  padding-top: 28px;
  border-top: 1px solid var(--border);
}
.highlight-item {
  display: flex; gap: 18px; align-items: center;
  padding: 16px 18px;
  border-radius: 12px;
  background: #fff;
  border: 1px solid var(--border);
  transition: all .3s;
}
.highlight-item:hover {
  transform: translateX(4px);
  box-shadow: var(--shadow-md);
}
.hl-num {
  font-family: "SF Mono", Menlo, monospace;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 1px;
  flex-shrink: 0;
  width: 36px; height: 36px;
  border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
  color: #fff;
}
.hl-purple .hl-num { background: var(--grad-purple); }
.hl-blue .hl-num { background: var(--grad-blue); }
.hl-orange .hl-num { background: var(--grad-orange); }

.hl-text { display: flex; flex-direction: column; gap: 2px; }
.hl-text strong {
  font-size: 15px;
  color: var(--text);
  font-weight: 700;
}
.hl-text span {
  font-size: 13px;
  color: var(--text-3);
}

/* 关于 · 右侧图片 */
.about-visual {
  position: relative;
  aspect-ratio: 4 / 5;
}
.about-image-wrap {
  position: relative;
  border-radius: 24px;
  overflow: hidden;
  height: 100%;
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--border);
}
.about-image-wrap img,
.about-image-wrap svg {
  width: 100%; height: 100%;
  object-fit: cover;
  display: block;
  transition: transform .8s var(--ease);
}
.about-image-wrap:hover img,
.about-image-wrap:hover svg { transform: scale(1.04); }

.about-floating-card {
  position: absolute;
  bottom: 24px; left: 24px;
  padding: 16px 20px;
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  box-shadow: var(--shadow-md);
  border: 1px solid var(--border);
}
.float-label {
  font-family: "SF Mono", Menlo, monospace;
  font-size: 10px;
  background: var(--grad-ai);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  letter-spacing: 1.5px;
  margin-bottom: 4px;
  font-weight: 700;
}
.float-value {
  font-size: 16px;
  color: var(--text);
  font-weight: 700;
  letter-spacing: -.3px;
  margin-bottom: 2px;
}
.float-sub {
  font-size: 11px;
  color: var(--text-3);
  letter-spacing: .3px;
}

.about-badge {
  position: absolute;
  top: 24px; right: -20px;
  width: 80px; height: 80px;
  border-radius: 50%;
  background: var(--grad-ai);
  color: #fff;
  display: flex; flex-direction: column;
  align-items: center; justify-content: center;
  box-shadow: 0 14px 40px -8px rgba(139, 92, 246, 0.55);
  animation: badgePulse 3s ease-in-out infinite;
}
.badge-num {
  font-size: 24px;
  font-weight: 800;
  letter-spacing: -1px;
  line-height: 1;
}
.badge-text {
  font-size: 10px;
  letter-spacing: 2px;
  margin-top: 4px;
  opacity: .9;
}
@keyframes badgePulse {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.06); }
}

/* ============ 核心优势 ============ */

.advantage {
  background: linear-gradient(180deg, #f7f8fc 0%, #ffffff 100%);
}

.adv-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 16px;
}
.adv-item {
  padding: 32px 28px;
  border-radius: 20px;
  background: #fff;
  border: 1px solid var(--border);
  transition: all .4s var(--ease);
  position: relative;
  overflow: hidden;
}
.adv-item::before {
  content: ''; position: absolute;
  top: 0; left: 0; right: 0; height: 4px;
}
.adv-item:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
}
.adv-purple::before { background: var(--grad-purple); }
.adv-blue::before { background: var(--grad-blue); }
.adv-orange::before { background: var(--grad-orange); }
.adv-green::before { background: var(--grad-green); }

.adv-item .adv-num {
  font-family: "SF Mono", Menlo, monospace;
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 1.5px;
  margin-bottom: 20px;
  display: inline-block;
  padding: 4px 10px;
  border-radius: 6px;
  color: #fff;
}
.adv-purple .adv-num { background: var(--grad-purple); }
.adv-blue .adv-num { background: var(--grad-blue); }
.adv-orange .adv-num { background: var(--grad-orange); }
.adv-green .adv-num { background: var(--grad-green); }

.adv-item h3 {
  font-size: 20px;
  color: var(--text);
  font-weight: 700;
  letter-spacing: -.3px;
  margin-bottom: 12px;
}
.adv-item p {
  font-size: 14px;
  color: var(--text-2);
  line-height: 1.75;
}

/* ============ 合作 ============ */

.contact {
  background: linear-gradient(180deg, #ffffff 0%, #faf5ff 50%, #ffffff 100%);
  position: relative;
  overflow: hidden;
}
.contact::before {
  content: ''; position: absolute;
  top: 0; left: 50%;
  transform: translateX(-50%);
  width: 900px; height: 500px;
  background: radial-gradient(ellipse, rgba(139, 92, 246, 0.08) 0%, transparent 70%);
  filter: blur(60px);
}

.contact-wrap {
  max-width: 760px;
  margin: 0 auto;
  text-align: center;
  position: relative;
  z-index: 1;
}
.contact-title {
  font-size: clamp(32px, 5vw, 56px);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -1.5px;
  color: var(--text);
  margin: 20px 0 22px;
}
.contact-sub {
  font-size: 16px;
  color: var(--text-2);
  line-height: 1.8;
  margin-bottom: 48px;
}

.contact-form {
  text-align: left;
  background: #fff;
  border-radius: 24px;
  padding: 40px;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-lg);
}
.form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-bottom: 16px;
}
.form-field { margin-bottom: 16px; }
.form-field label {
  display: block;
  font-size: 12px;
  color: var(--text-2);
  letter-spacing: .3px;
  margin-bottom: 8px;
  font-weight: 600;
}
.contact-form input,
.contact-form select,
.contact-form textarea {
  width: 100%;
  padding: 13px 16px;
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: 10px;
  font-size: 14px;
  color: var(--text);
  font-family: inherit;
  transition: all .2s;
}
.contact-form input::placeholder,
.contact-form textarea::placeholder { color: var(--text-4); }
.contact-form input:focus,
.contact-form select:focus,
.contact-form textarea:focus {
  outline: none;
  border-color: var(--purple);
  background: #fff;
  box-shadow: 0 0 0 3px rgba(139, 92, 246, 0.12);
}
.contact-form select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%234b5670' stroke-width='2'%3E%3Cpolyline points='6 9 12 15 18 9'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 16px center;
}
.contact-form textarea { resize: vertical; }

.form-privacy {
  display: flex; align-items: center; gap: 6px;
  margin-top: 16px;
  font-size: 12px;
  color: var(--text-3);
  justify-content: center;
}
.form-privacy svg { color: var(--purple); }

/* ============ 底部 ============ */

.footer {
  background: #0a0e1c;
  color: rgba(255, 255, 255, 0.7);
  padding-top: 72px;
}

.footer-inner {
  display: grid;
  grid-template-columns: 1.5fr 2fr;
  gap: 60px;
  padding-bottom: 56px;
  align-items: flex-start;
}
.footer-brand .logo { margin-bottom: 18px; }
.footer-brand .logo-cn { color: #fff; }
.footer-brand .logo-en { color: rgba(255,255,255,0.5); }
.footer-tagline {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.6);
  line-height: 1.7;
  max-width: 280px;
}

.footer-meta-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}
.meta-label {
  font-family: "SF Mono", Menlo, monospace;
  font-size: 10px;
  color: rgba(255, 255, 255, 0.4);
  letter-spacing: 1.5px;
  margin-bottom: 8px;
}
.meta-value {
  font-size: 13px;
  color: #fff;
  font-weight: 500;
  line-height: 1.5;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding: 24px 0;
}
.footer-bottom-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
  font-size: 12px;
  color: rgba(255, 255, 255, 0.5);
}
.footer-icp {
  display: flex; gap: 10px; align-items: center;
  flex-wrap: wrap;
}
.footer-icp a {
  color: rgba(255, 255, 255, 0.7);
  transition: color .2s;
}
.footer-icp a:hover {
  background: var(--grad-ai);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.footer-icp .divider { opacity: .4; }

/* ============ 响应式 ============ */

@media (max-width: 1100px) {
  .hero-inner { grid-template-columns: 1fr; }
  .hero-visual { max-width: 420px; margin: 0 auto; }
  .about-grid { grid-template-columns: 1fr; gap: 48px; }
  .about-visual { max-width: 520px; margin: 0 auto; aspect-ratio: 16/10; }
  .about-badge { top: 16px; right: 16px; }
}

@media (max-width: 960px) {
  .nav-menu, .nav-cta { display: none; }
  .nav-toggle { display: flex; }
  .nav-menu.active {
    display: flex; flex-direction: column; gap: 4px;
    position: absolute; top: 72px; left: 0; right: 0;
    padding: 20px;
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
  }
  .section { padding: 80px 0; }
  .hero { padding: 110px 0 60px; min-height: auto; }
  .hero-title { font-size: 44px; }
  .footer-inner { grid-template-columns: 1fr; gap: 32px; }
  .footer-meta-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 640px) {
  .container { padding: 0 20px; }
  .hero-title { font-size: 38px; letter-spacing: -1px; }
  .hero-subtitle { font-size: 15px; }
  .hero-actions { flex-direction: column; }
  .hero-actions .btn { width: 100%; justify-content: center; }
  .hero-card { display: none; }
  .hero-visual { max-width: 300px; }
  .section-title { font-size: 32px; }
  .contact-title { font-size: 34px; }
  .footer-meta-grid { grid-template-columns: 1fr; gap: 20px; }
  .footer-bottom-inner { flex-direction: column; gap: 10px; text-align: center; }
}

/* 淡入 */
.fade-in {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity .7s var(--ease), transform .7s var(--ease);
}
.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}