/* ============================================================
   汇流量官网 - 重构版样式
   深色科技感 · 玻璃拟态 · 渐变光效
   ============================================================ */

:root {
  --bg: #060218;
  --bg-alt: #070319;
  --bg-card: rgba(160, 104, 255, 0.05);
  --border: rgba(160, 104, 255, 0.18);
  --border-glow: rgba(160, 104, 255, 0.4);
  --primary: #A068FF;
  --cyan: #00E5FF;
  --teal: #00E5FF;
  --purple: #A068FF;
  --text: #FFFFFF;
  --text-dim: #CBD5E1;
  --text-mute: #6b6480;
  --danger: #ff5c7a;
  --gradient-main: linear-gradient(135deg, #A068FF 0%, #00E5FF 100%);
  --gradient-purple: linear-gradient(135deg, #A068FF, #00E5FF);
  --radius: 18px;
  --radius-sm: 10px;
  --shadow-glow: 0 0 40px rgba(160, 104, 255, 0.25);
  --nav-h: 72px;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

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

html { scroll-behavior: smooth; scroll-padding-top: var(--nav-h); }

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  background: linear-gradient(180deg, #060218 0%, #070319 100%);
  color: var(--text);
  line-height: 1.7;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

/* 数字 / 标题字体 */
.font-orbitron { font-family: 'Urbanist', 'Inter', sans-serif; letter-spacing: .02em; }

/* 科技网格背景纹理（紫色调） */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(rgba(160, 104, 255, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(160, 104, 255, 0.04) 1px, transparent 1px);
  background-size: 48px 48px;
  pointer-events: none;
  z-index: 0;
  mask-image: radial-gradient(ellipse at center, #000 30%, transparent 80%);
  -webkit-mask-image: radial-gradient(ellipse at center, #000 30%, transparent 80%);
}

a { color: var(--primary); text-decoration: none; transition: color .25s; }
a:hover { color: var(--cyan); }
img { max-width: 100%; display: block; }
ul { list-style: none; }

.container {
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 24px;
  position: relative;
  z-index: 1;
}

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 32px;
  border-radius: 50px;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  border: 1px solid transparent;
  transition: transform .25s, box-shadow .25s, background .25s, border-color .25s;
  text-align: center;
  white-space: nowrap;
}
.btn-primary {
  background: var(--gradient-main);
  color: #04121f;
  box-shadow: 0 8px 24px rgba(160, 104, 255, 0.3);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 12px 32px rgba(160, 104, 255, 0.45); color: #04121f; }
.btn-glow { animation: btnPulse 2.8s ease-in-out infinite; }
@keyframes btnPulse {
  0%, 100% { box-shadow: 0 8px 24px rgba(160, 104, 255, 0.3); }
  50% { box-shadow: 0 8px 44px rgba(160, 104, 255, 0.6); }
}
.btn-outline {
  background: rgba(255, 255, 255, 0.04);
  color: var(--text);
  border-color: var(--border);
  backdrop-filter: blur(10px);
}
.btn-outline:hover { border-color: var(--cyan); color: var(--cyan); transform: translateY(-2px); }
.btn-block { display: flex; width: 100%; }
.btn-lg { padding: 16px 36px; font-size: 16px; }

/* ---------- 加载遮罩 ---------- */
.loading-overlay {
  position: fixed;
  inset: 0;
  background: var(--bg);
  z-index: 9999;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: opacity .8s, visibility .8s;
}
.loading-overlay.hidden { opacity: 0; visibility: hidden; }
.loading-inner { text-align: center; color: var(--text-dim); }
.loading-spinner {
  width: 56px; height: 56px;
  margin: 0 auto 20px;
  border: 3px solid rgba(160, 104, 255, 0.15);
  border-top-color: var(--cyan);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }
.loading-dots span { animation: dotBlink 1.4s infinite; display: inline-block; }
.loading-dots span:nth-child(2) { animation-delay: .2s; }
.loading-dots span:nth-child(3) { animation-delay: .4s; }
@keyframes dotBlink { 0%, 80%, 100% { opacity: .2; } 40% { opacity: 1; } }

/* ---------- 页面加载进度条 ---------- */
.page-loader {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: 3px;
  z-index: 9998;
  background: rgba(160, 104, 255, 0.08);
  opacity: 1;
  transition: opacity .5s ease .2s;
}
.page-loader-bar {
  height: 100%;
  width: 0;
  background: linear-gradient(90deg, #A068FF, #A068FF, #00E5FF);
  box-shadow: 0 0 12px rgba(160, 104, 255, 0.8);
  transition: width .5s cubic-bezier(.22, 1, .36, 1);
}
.page-loader.done { opacity: 0; pointer-events: none; }

/* ---------- 导航栏 ---------- */
.navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--nav-h);
  z-index: 1000;
  transition: background .35s, box-shadow .35s, backdrop-filter .35s;
  background: transparent;
}
.navbar.scrolled {
  background: rgba(6, 2, 24, 0.8);
  backdrop-filter: blur(16px) saturate(140%);
  -webkit-backdrop-filter: blur(16px) saturate(140%);
  box-shadow: 0 4px 30px rgba(0, 0, 0, 0.4);
  border-bottom: 1px solid var(--border);
}
.nav-inner {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--text);
}
.brand-logo {
  height: 36px;
  width: 36px;
  object-fit: cover;
  border-radius: 8px;
  box-shadow: 0 0 16px rgba(160, 104, 255, 0.35);
}
.brand-name {
  font-size: 19px;
  font-weight: 700;
  background: var(--gradient-main);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
}
.nav-links a {
  color: var(--text-dim);
  font-size: 14.5px;
  font-weight: 500;
  position: relative;
  transition: color .25s;
}
.nav-links a:hover { color: var(--text); }
.nav-links a:not(.nav-cta)::after {
  content: '';
  position: absolute;
  left: 0; bottom: -6px;
  width: 100%; height: 2px;
  background: var(--gradient-main);
  transform: scaleX(0);
  transform-origin: center;
  transition: transform .35s cubic-bezier(.22, 1, .36, 1);
}
.nav-links a:not(.nav-cta):hover::after { transform: scaleX(1); }
.nav-cta {
  padding: 9px 22px;
  border-radius: 50px;
  background: var(--gradient-main);
  color: #04121f !important;
  font-weight: 600;
}
.nav-cta:hover { box-shadow: 0 6px 20px rgba(160, 104, 255, 0.4); }
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}
.nav-toggle span {
  width: 24px; height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: transform .4s cubic-bezier(.22, 1, .36, 1), opacity .3s;
}
.nav-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; transform: scaleX(0); }
.nav-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ---------- Hero ---------- */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: calc(var(--nav-h) + 40px) 0 80px;
  overflow: hidden;
}
.hero-canvas {
  position: absolute;
  inset: 0;
  z-index: 0;
  width: 100%;
  height: 100%;
}
.hero-video {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  z-index: 0;
  opacity: .4;
}
.hero-overlay {
  position: absolute;
  inset: 0;
  z-index: 1;
  background:
    radial-gradient(ellipse at 20% 30%, rgba(160, 104, 255, 0.12), transparent 50%),
    radial-gradient(ellipse at 80% 70%, rgba(160, 104, 255, 0.12), transparent 50%),
    linear-gradient(180deg, rgba(8, 4, 24, 0.3) 0%, rgba(8, 4, 24, 0.55) 70%, var(--bg) 100%);
  pointer-events: none;
}
.hero .container.hero-content {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 48px;
  align-items: center;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  padding: 8px 18px;
  border-radius: 50px;
  background: rgba(160, 104, 255, 0.1);
  border: 1px solid rgba(160, 104, 255, 0.3);
  color: var(--cyan);
  font-size: 13px;
  margin-bottom: 26px;
  backdrop-filter: blur(10px);
}
.hero-title {
  font-size: clamp(34px, 5.2vw, 60px);
  line-height: 1.15;
  font-weight: 800;
  margin-bottom: 22px;
  letter-spacing: -1px;
}
.hero-subtitle {
  font-size: 18px;
  color: var(--text-dim);
  max-width: 560px;
  margin-bottom: 34px;
}
.hero-buttons { display: flex; gap: 16px; flex-wrap: wrap; margin-bottom: 36px; }
.hero-platforms {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
}
.platform-label { color: var(--text-mute); font-size: 13px; }
.platform-tag {
  padding: 5px 14px;
  border-radius: 20px;
  font-size: 12.5px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border);
  color: var(--text-dim);
}

/* 对话演示 */
.hero-demo { display: flex; justify-content: center; }
.chat-box {
  width: 100%;
  max-width: 420px;
  padding: 24px;
  border-radius: 18px;
  background: rgba(18, 10, 44, 0.55);
  backdrop-filter: blur(18px);
  border: 1px solid var(--border);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.4);
}
.glass-card {
  background: rgba(255, 255, 255, 0.05);
  backdrop-filter: blur(16px);
  border: 1px solid var(--border);
}
.chat-msg {
  display: flex;
  gap: 10px;
  margin-bottom: 14px;
  align-items: flex-start;
  font-size: 14px;
  line-height: 1.6;
}
.chat-msg:last-child { margin-bottom: 0; }
.chat-label {
  flex-shrink: 0;
  width: 26px; height: 26px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  font-weight: 700;
}
.chat-msg.user .chat-label { background: rgba(255,255,255,0.12); color: var(--text-dim); }
.chat-msg.ai .chat-label { background: var(--gradient-main); color: #04121f; }
.chat-msg.ai span:last-child { color: #cfe8ff; }

.hero-scroll-hint {
  position: absolute;
  bottom: 28px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  color: var(--text-mute);
  font-size: 12px;
}
.mouse {
  width: 22px; height: 36px;
  border: 2px solid var(--text-mute);
  border-radius: 12px;
  display: flex;
  justify-content: center;
  padding-top: 6px;
}
.wheel {
  width: 3px; height: 7px;
  background: var(--cyan);
  border-radius: 2px;
  animation: wheelDrop 1.6s infinite;
}
@keyframes wheelDrop {
  0% { transform: translateY(0); opacity: 1; }
  100% { transform: translateY(12px); opacity: 0; }
}

/* ---------- 统计条 ---------- */
.stats-bar {
  position: relative;
  z-index: 2;
  padding: 44px 0;
  background: rgba(160, 104, 255, 0.04);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-top: 1px solid rgba(160, 104, 255, 0.18);
  border-bottom: 1px solid rgba(160, 104, 255, 0.18);
}
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  text-align: center;
}
.stat-number {
  font-size: 46px;
  font-weight: 800;
  background: var(--gradient-main);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  line-height: 1.1;
  display: inline-block;
}
/* 数字到达目标时的微弹 */
.stat-number.pop { animation: statPop .45s cubic-bezier(.22, 1, .36, 1); }
@keyframes statPop {
  0% { transform: scale(1); }
  40% { transform: scale(1.12); }
  100% { transform: scale(1); }
}
.stat-suffix {
  font-size: 24px;
  -webkit-text-fill-color: var(--cyan);
  text-shadow: 0 0 18px rgba(160, 104, 255, 0.55);
}
.stat-label { color: var(--text-dim); font-size: 14px; margin-top: 6px; }
/* stat 进入延迟 stagger 100ms */
.stats-grid .reveal:nth-child(1) { transition-delay: 0s; }
.stats-grid .reveal:nth-child(2) { transition-delay: .1s; }
.stats-grid .reveal:nth-child(3) { transition-delay: .2s; }
.stats-grid .reveal:nth-child(4) { transition-delay: .3s; }

/* ---------- 通用 Section ---------- */
.section {
  padding: 100px 0;
  position: relative;
  z-index: 1;
}
/* 深色/交替板块用半透明紫色叠加，让背景 3D 光晕能透出来 */
.section-dark { background: rgba(6, 2, 24, 0.55); }
.section-alt { background: linear-gradient(180deg, rgba(7, 3, 25, 0.55), rgba(6, 2, 24, 0.35)); }
.section-header {
  text-align: center;
  max-width: 780px;
  margin: 0 auto 60px;
}
.section-tag {
  display: inline-block;
  padding: 6px 16px;
  border-radius: 50px;
  font-size: 13px;
  color: var(--cyan);
  background: rgba(160, 104, 255, 0.1);
  border: 1px solid rgba(160, 104, 255, 0.25);
  margin-bottom: 18px;
  letter-spacing: 1px;
}
.section-title {
  font-family: 'Urbanist', 'Inter', -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif;
  font-size: clamp(28px, 3.6vw, 42px);
  font-weight: 700;
  letter-spacing: -0.5px;
  line-height: 1.25;
  margin-bottom: 16px;
}
.section-subtitle { color: var(--text-dim); font-size: 17px; margin-bottom: 10px; }
.section-desc { color: var(--text-mute); font-size: 15px; }

/* ---------- 卡片网格 ---------- */
.services-grid,
.coverage-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.service-card,
.coverage-card,
.pain-card,
.step-card,
.engine-card,
.industry-card,
.team-card {
  padding: 32px 26px;
  border-radius: var(--radius);
  background: var(--bg-card);
  border: 1px solid var(--border);
  transition: transform .3s, box-shadow .3s, border-color .3s;
  position: relative;
  overflow: hidden;
}
.service-card::before,
.pain-card::before,
.step-card::before,
.engine-card::before,
.coverage-card::before,
.industry-card::before,
.team-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: var(--gradient-main);
  opacity: 0;
  transition: opacity .3s;
}
.service-card:hover::before,
.pain-card:hover::before,
.step-card:hover::before,
.engine-card:hover::before,
.coverage-card:hover::before,
.industry-card:hover::before,
.team-card:hover::before { opacity: 1; }
.service-card:hover,
.pain-card:hover,
.step-card:hover,
.engine-card:hover,
.coverage-card:hover,
.industry-card:hover,
.team-card:hover {
  border-color: rgba(160, 104, 255, 0.4);
  box-shadow: 0 12px 40px rgba(160, 104, 255, 0.12);
}
.service-icon, .coverage-icon, .pain-icon, .step-icon,
.engine-icon, .industry-icon, .team-icon {
  font-size: 36px;
  margin-bottom: 16px;
  display: inline-block;
}
.service-card h3, .coverage-card h3, .pain-card h3,
.step-card h3, .engine-card h3, .industry-card h3, .team-card h3 {
  font-size: 19px;
  margin-bottom: 10px;
}
.service-card p, .coverage-card p, .pain-card p,
.step-card p, .engine-card p, .industry-card p, .team-card p {
  color: var(--text-dim);
  font-size: 14.5px;
}

.pain-grid, .steps-grid, .engines-grid,
.industry-grid, .team-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.pain-num, .step-num, .engine-num, .team-number {
  position: absolute;
  top: 18px; right: 22px;
  font-size: 52px;
  font-weight: 900;
  color: rgba(160, 104, 255, 0.08);
  line-height: 1;
  font-style: italic;
}

/* 时间线 */
.timeline {
  margin-top: 60px;
  position: relative;
  padding-left: 30px;
}
.timeline::before {
  content: '';
  position: absolute;
  left: 6px; top: 8px; bottom: 8px;
  width: 2px;
  background: linear-gradient(180deg, var(--primary), rgba(160, 104, 255, 0.1));
  box-shadow: 0 0 8px rgba(160, 104, 255, 0.4);
}
.timeline-item { position: relative; padding-bottom: 28px; }
.timeline-item::before {
  content: '';
  position: absolute;
  left: -30px; top: 6px;
  width: 14px; height: 14px;
  border-radius: 50%;
  background: var(--bg);
  border: 3px solid var(--primary);
  box-shadow: 0 0 12px rgba(160, 104, 255, 0.7);
}
.timeline-time { color: var(--primary); font-weight: 700; margin-bottom: 4px; text-shadow: 0 0 10px rgba(160, 104, 255, 0.4); }
.timeline-desc { color: var(--text-dim); }

/* 对比 */
.comparison-wrap {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 28px;
}
.comparison-col {
  padding: 36px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
}
.comparison-col h3 { font-size: 20px; margin-bottom: 20px; }
.comparison-col ul li {
  padding: 10px 0;
  border-bottom: 1px dashed rgba(255,255,255,0.06);
  color: var(--text-dim);
  font-size: 15px;
}
.comparison-traditional {
  background: rgba(255, 92, 122, 0.06);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}
.comparison-traditional h3 { color: #ff7676; }
.comparison-aigeo {
  background: rgba(160, 104, 255, 0.08);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-color: rgba(160, 104, 255, 0.45);
  box-shadow: 0 0 40px rgba(160, 104, 255, 0.2), inset 0 1px 0 rgba(255, 255, 255, 0.05);
}
.comparison-aigeo h3 { color: var(--cyan); }
.comparison-aigeo ul li { color: var(--text); }

/* 优势 */
.advantages-grid {
  margin-top: 50px;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}
.advantage-item {
  display: flex;
  gap: 16px;
  padding: 22px;
  border-radius: var(--radius);
  background: var(--bg-card);
  border: 1px solid var(--border);
}
.adv-icon { font-size: 28px; }
.advantage-item h4 { font-size: 16px; margin-bottom: 4px; }
.advantage-item p { color: var(--text-dim); font-size: 14px; }

/* 方案卡片 */
.plans-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  align-items: stretch;
}
.plan-card {
  padding: 38px 30px;
  border-radius: 20px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  position: relative;
  display: flex;
  flex-direction: column;
  transition: transform .3s, box-shadow .3s;
}
.plan-featured {
  background: linear-gradient(160deg, rgba(160, 104, 255, 0.1), rgba(160, 104, 255, 0.04));
  border-color: var(--cyan);
  box-shadow: 0 0 50px rgba(160, 104, 255, 0.2);
}
.plan-tag {
  position: absolute;
  top: -13px; left: 50%;
  transform: translateX(-50%);
  padding: 5px 18px;
  border-radius: 50px;
  background: var(--gradient-main);
  color: #04121f;
  font-size: 12px;
  font-weight: 700;
}
.plan-level { color: var(--text-mute); font-size: 13px; letter-spacing: 2px; }
.plan-title { font-size: 22px; margin: 6px 0 18px; }
.plan-price { margin-bottom: 14px; }
.price-num {
  font-size: 46px;
  font-weight: 800;
  background: var(--gradient-main);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.price-unit { color: var(--text-mute); font-size: 14px; }
.plan-target { color: var(--text-dim); font-size: 14px; margin-bottom: 20px; }
.plan-features { margin-bottom: 28px; flex: 1; }
.plan-features li {
  padding: 7px 0;
  font-size: 14.5px;
  color: var(--text-dim);
}

/* 平台 / 覆盖 */
.platforms-showcase {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  justify-content: center;
  margin-bottom: 50px;
}
.platform-item {
  padding: 10px 24px;
  border-radius: 50px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  font-size: 14px;
  transition: all .25s;
}
.platform-item:hover {
  border-color: var(--cyan);
  color: var(--cyan);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(160, 104, 255, 0.2);
}

/* 客户滚动 */
.clients-marquee {
  margin-top: 60px;
  overflow: hidden;
  mask-image: linear-gradient(90deg, transparent, #000 10%, #000 90%, transparent);
  -webkit-mask-image: linear-gradient(90deg, transparent, #000 10%, #000 90%, transparent);
}
.marquee-track {
  display: flex;
  gap: 40px;
  width: max-content;
  animation: marquee 30s linear infinite;
}
.client-name {
  font-size: 16px;
  color: var(--text-mute);
  white-space: nowrap;
}
@keyframes marquee {
  from { transform: translateX(0); }
  to { transform: translateX(-50%); }
}
.trusted-bar {
  margin-top: 40px;
  text-align: center;
  color: var(--text-mute);
  font-size: 14px;
}
.trusted-name {
  display: inline-block;
  margin: 4px 6px;
  padding: 4px 14px;
  border-radius: 6px;
  background: rgba(255,255,255,0.04);
  color: var(--text-dim);
}

/* ---------- 网站案例 ---------- */
.website-cases-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 26px;
}
.website-case-card {
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--bg-card);
  border: 1px solid var(--border);
  cursor: pointer;
  transition: transform .35s, box-shadow .35s;
  display: flex;
  flex-direction: column;
}
.website-case-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.5), 0 0 30px rgba(160, 104, 255, 0.15);
  border-color: rgba(160, 104, 255, 0.4);
}
.case-screenshot {
  position: relative;
  aspect-ratio: 16 / 10;
  overflow: hidden;
  background: #050212;
}
.case-screenshot img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform .5s;
}
.website-case-card:hover .case-screenshot img { transform: scale(1.08); }
.case-placeholder {
  width: 100%; height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-mute);
  font-size: 15px;
  background: linear-gradient(135deg, #120a2e, #0a0520);
}
.case-info { padding: 22px; flex: 1; display: flex; flex-direction: column; }
.case-industry {
  display: inline-block;
  align-self: flex-start;
  padding: 3px 12px;
  border-radius: 4px;
  background: rgba(160, 104, 255, 0.12);
  color: var(--cyan);
  font-size: 12px;
  margin-bottom: 10px;
}
.case-info h3 { font-size: 18px; margin-bottom: 8px; }
.case-info p { color: var(--text-dim); font-size: 14px; margin-bottom: 14px; flex: 1; }
.case-features { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 14px; }
.feature-tag {
  padding: 3px 10px;
  border-radius: 4px;
  background: rgba(255,255,255,0.06);
  font-size: 12px;
  color: var(--text-dim);
}
.case-link {
  color: var(--cyan);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
}

/* ---------- 新闻动态 ---------- */
.news-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 26px;
}
.news-card {
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--bg-card);
  border: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  color: var(--text);
  transition: transform .35s, box-shadow .35s, border-color .35s;
}
.news-card:hover {
  transform: translateY(-8px);
  border-color: rgba(160, 104, 255, 0.4);
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.5), 0 0 30px rgba(160, 104, 255, 0.15);
  color: var(--text);
}
.news-cover {
  position: relative;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background: #050212;
}
.news-cover img {
  width: 100%; height: 100%;
  object-fit: cover;
  transition: transform .5s;
}
.news-card:hover .news-cover img { transform: scale(1.08); }
.news-cover-placeholder {
  width: 100%; height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #140a38, #0b0624);
}
.news-cover-icon { font-size: 48px; opacity: .6; }
.news-date {
  position: absolute;
  bottom: 12px; left: 12px;
  padding: 4px 12px;
  border-radius: 6px;
  background: rgba(8, 4, 24, 0.8);
  backdrop-filter: blur(8px);
  font-size: 12px;
  color: var(--cyan);
}
.news-body { padding: 20px; flex: 1; display: flex; flex-direction: column; }
.news-heading {
  font-size: 17px;
  margin-bottom: 10px;
  line-height: 1.4;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.news-summary {
  color: var(--text-dim);
  font-size: 13.5px;
  flex: 1;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin-bottom: 14px;
}
.news-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 12.5px;
  color: var(--text-mute);
}
.news-more { color: var(--cyan); }
.news-empty {
  text-align: center;
  color: var(--text-mute);
  padding: 60px 0;
}

/* ---------- FAQ ---------- */
.faq-list { max-width: 820px; margin: 0 auto; }
.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  margin-bottom: 14px;
  overflow: hidden;
  transition: border-color .3s;
}
.faq-item.open {
  border-color: rgba(160, 104, 255, 0.4);
  box-shadow: 0 8px 30px rgba(160, 104, 255, 0.1);
}
.faq-item.open::before {
  content: '';
  position: absolute;
  left: 0; top: 0; bottom: 0;
  width: 3px;
  background: linear-gradient(180deg, var(--primary), var(--cyan));
  box-shadow: 0 0 12px rgba(160, 104, 255, 0.6);
}
.faq-item { position: relative; }
.faq-question {
  padding: 20px 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
  font-weight: 600;
  font-size: 16px;
}
.faq-toggle {
  font-size: 24px;
  color: var(--cyan);
  transition: transform .3s;
}
.faq-item.open .faq-toggle { transform: rotate(45deg); }
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height .35s ease, padding .35s ease;
  padding: 0 24px;
  color: var(--text-dim);
  font-size: 14.5px;
}
.faq-item.open .faq-answer { max-height: 500px; padding: 0 24px 20px; }

/* ---------- 联系板块 ---------- */
.contact-section { background: linear-gradient(180deg, rgba(6, 2, 24, 0.4), rgba(16, 6, 40, 0.55)); }
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.1fr;
  gap: 36px;
}
.contact-info h3, .contact-form-wrap h3 {
  font-size: 22px;
  margin-bottom: 18px;
}
.contact-list { margin-bottom: 24px; }
.contact-list li {
  display: flex;
  gap: 14px;
  align-items: flex-start;
  margin-bottom: 16px;
}
.ci-icon {
  flex-shrink: 0;
  width: 44px; height: 44px;
  border-radius: 12px;
  background: rgba(160, 104, 255, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
}
.contact-list strong { display: block; font-size: 14px; color: var(--text); }
.contact-list p { color: var(--text-dim); font-size: 14px; }
.map-container {
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border);
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.4);
}
.map-container iframe { display: block; filter: invert(.92) hue-rotate(180deg) saturate(.6); }

.contact-form-wrap {
  padding: 36px;
  border-radius: 20px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  backdrop-filter: blur(12px);
}
.contact-form-desc { color: var(--text-dim); font-size: 14px; margin-bottom: 24px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-group { margin-bottom: 16px; }
.form-group label {
  display: block;
  font-size: 13.5px;
  margin-bottom: 8px;
  color: var(--text-dim);
}
.form-group label em { color: #ff6b6b; font-style: normal; }
.form-group input,
.form-group textarea {
  width: 100%;
  padding: 13px 16px;
  border-radius: var(--radius-sm);
  background: rgba(8, 4, 24, 0.6);
  border: 1px solid var(--border);
  color: var(--text);
  font-size: 14.5px;
  font-family: inherit;
  transition: border-color .25s, box-shadow .25s;
  resize: vertical;
}
.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--cyan);
  box-shadow: 0 0 0 3px rgba(160, 104, 255, 0.15);
}
.form-group input.error,
.form-group textarea.error { border-color: #ff6b6b; }
.partner-note {
  margin-top: 16px;
  text-align: center;
  color: var(--text-mute);
  font-size: 12.5px;
}
.btn[disabled] { opacity: .6; cursor: not-allowed; }

/* ---------- 页脚 ---------- */
.footer {
  background: linear-gradient(180deg, rgba(8, 4, 26, 0.6), rgba(4, 2, 16, 0.9));
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-top: 1px solid var(--border);
  padding-top: 60px;
  position: relative;
  z-index: 1;
}
/* 顶部紫色渐变分隔线 */
.footer::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(160, 104, 255, 0.6), rgba(0, 229, 255, 0.4), transparent);
  box-shadow: 0 0 12px rgba(160, 104, 255, 0.4);
}
.footer-inner {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 40px;
  padding-bottom: 50px;
}
.footer-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 14px;
}
.footer-logo img {
  width: 46px; height: 46px;
  border-radius: 10px;
  object-fit: cover;
}
.footer-logo h3 { font-size: 20px; }
.footer-brand p { color: var(--text-mute); font-size: 14px; max-width: 320px; }
.footer-col h4 {
  font-size: 15px;
  margin-bottom: 16px;
  color: var(--text);
}
.footer-col p { margin-bottom: 8px; }
.footer-col a { color: var(--text-dim); font-size: 14px; }
.footer-col a:hover { color: var(--cyan); }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.05);
  padding: 20px 0;
  text-align: center;
  color: var(--text-mute);
  font-size: 13px;
}

/* ---------- Modal ---------- */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(3, 1, 14, 0.75);
  backdrop-filter: blur(6px);
  z-index: 2000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  opacity: 0;
  visibility: hidden;
  transition: opacity .3s, visibility .3s;
}
.modal-overlay.open { opacity: 1; visibility: visible; }
.modal {
  position: relative;
  max-width: 560px;
  width: 100%;
  background: rgba(20, 10, 50, 0.75);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 40px;
  transform: translateY(20px) scale(.96);
  transition: transform .3s;
  box-shadow: 0 30px 80px rgba(0,0,0,.6), 0 0 40px rgba(160, 104, 255, 0.15);
}
.modal-overlay.open .modal { transform: translateY(0) scale(1); }
.modal-close {
  position: absolute;
  top: 16px; right: 18px;
  background: none;
  border: none;
  color: var(--text-dim);
  font-size: 30px;
  cursor: pointer;
  line-height: 1;
}
.modal-close:hover { color: var(--text); }
.modal-tag {
  display: inline-block;
  padding: 4px 14px;
  border-radius: 4px;
  background: rgba(160, 104, 255, 0.12);
  color: var(--cyan);
  font-size: 12px;
  margin-bottom: 14px;
}
.modal-body h3 { font-size: 24px; margin-bottom: 14px; }
.modal-body p { color: var(--text-dim); margin-bottom: 20px; }
.modal-body .case-features { margin-bottom: 24px; }

/* ---------- Toast ---------- */
.toast {
  position: fixed;
  top: 90px;
  left: 50%;
  transform: translateX(-50%) translateY(-20px);
  padding: 14px 28px;
  border-radius: 50px;
  background: rgba(30, 14, 64, 0.92);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border: 1px solid rgba(160, 104, 255, 0.45);
  color: var(--text);
  font-size: 14.5px;
  z-index: 3000;
  opacity: 0;
  visibility: hidden;
  transition: all .35s;
  box-shadow: 0 10px 40px rgba(160, 104, 255, 0.3);
}
.toast.show { opacity: 1; visibility: visible; transform: translateX(-50%) translateY(0); }
.toast.error { border-color: #ff6b6b; }

/* ---------- 滚动动画 ---------- */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity .7s ease, transform .7s ease;
}
.reveal.active {
  opacity: 1;
  transform: translateY(0);
}
/* stagger 子项延迟 */
.services-grid .reveal:nth-child(1), .pain-grid .reveal:nth-child(1),
.steps-grid .reveal:nth-child(1), .engines-grid .reveal:nth-child(1),
.industry-grid .reveal:nth-child(1), .team-grid .reveal:nth-child(1),
.coverage-grid .reveal:nth-child(1), .news-grid .reveal:nth-child(1),
.website-cases-grid .reveal:nth-child(1) { transition-delay: 0s; }
.services-grid .reveal:nth-child(2), .pain-grid .reveal:nth-child(2),
.steps-grid .reveal:nth-child(2), .engines-grid .reveal:nth-child(2),
.industry-grid .reveal:nth-child(2), .team-grid .reveal:nth-child(2),
.coverage-grid .reveal:nth-child(2), .news-grid .reveal:nth-child(2),
.website-cases-grid .reveal:nth-child(2) { transition-delay: .12s; }
.services-grid .reveal:nth-child(3), .pain-grid .reveal:nth-child(3),
.steps-grid .reveal:nth-child(3), .engines-grid .reveal:nth-child(3),
.industry-grid .reveal:nth-child(3), .team-grid .reveal:nth-child(3),
.coverage-grid .reveal:nth-child(3), .news-grid .reveal:nth-child(3),
.website-cases-grid .reveal:nth-child(3) { transition-delay: .24s; }
.plans-grid .reveal:nth-child(1) { transition-delay: 0s; }
.plans-grid .reveal:nth-child(2) { transition-delay: .12s; }
.plans-grid .reveal:nth-child(3) { transition-delay: .24s; }
.news-grid .reveal:nth-child(4) { transition-delay: .12s; }
.news-grid .reveal:nth-child(5) { transition-delay: .24s; }
.news-grid .reveal:nth-child(6) { transition-delay: .36s; }

/* 3D 倾斜卡片 */
.tilt-card { transform-style: preserve-3d; will-change: transform; }

/* ---------- 文章详情页 ---------- */
.article-page {
  padding: calc(var(--nav-h) + 60px) 0 80px;
  min-height: 80vh;
  position: relative;
  z-index: 1;
}
.breadcrumb {
  font-size: 13.5px;
  color: var(--text-mute);
  margin-bottom: 28px;
}
.breadcrumb a { color: var(--text-dim); }
.breadcrumb span { margin: 0 8px; }
.article-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 50px;
}
.article-title {
  font-size: clamp(26px, 3.4vw, 38px);
  line-height: 1.3;
  margin-bottom: 16px;
}
.article-meta {
  display: flex;
  gap: 20px;
  color: var(--text-mute);
  font-size: 13.5px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 30px;
}
.article-cover {
  border-radius: var(--radius);
  overflow: hidden;
  margin-bottom: 30px;
}
.article-content {
  font-size: 16.5px;
  line-height: 1.9;
  color: #d5deea;
}
.article-content p { margin-bottom: 18px; }
.article-content h2, .article-content h3 { margin: 28px 0 14px; color: var(--text); }
.article-content img { border-radius: var(--radius); margin: 16px 0; max-width: 100%; }
.article-content a { color: var(--cyan); }
.article-footer {
  margin-top: 50px;
  padding-top: 30px;
  border-top: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  gap: 20px;
}
.article-pager {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}
.pager-link {
  padding: 18px;
  border-radius: var(--radius-sm);
  background: rgba(255,255,255,0.03);
  border: 1px solid var(--border);
  display: block;
}
.pager-next { text-align: right; }
.pager-label { font-size: 12px; color: var(--text-mute); display: block; margin-bottom: 4px; }
.pager-title { font-size: 14px; color: var(--text); }
.pager-link:hover .pager-title { color: var(--cyan); }
.article-not-found {
  text-align: center;
  padding: 80px 0;
}
.article-not-found h1 { font-size: 32px; margin-bottom: 16px; }
.article-not-found p { color: var(--text-dim); margin-bottom: 28px; }

/* 尊重减少动画偏好 */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .01ms !important; transition-duration: .01ms !important; }
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; }
}

/* ============================================================
   响应式
   ============================================================ */
@media (max-width: 992px) {
  .hero .container.hero-content { grid-template-columns: 1fr; gap: 40px; }
  .hero-demo { order: 2; }
  .services-grid, .pain-grid, .steps-grid, .engines-grid,
  .industry-grid, .team-grid, .coverage-grid, .plans-grid,
  .website-cases-grid, .news-grid { grid-template-columns: repeat(2, 1fr); }
  .contact-grid { grid-template-columns: 1fr; }
  .footer-inner { grid-template-columns: 1fr 1fr; }
  .comparison-wrap { grid-template-columns: 1fr; }
  .advantages-grid { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 30px; }
}

@media (max-width: 768px) {
  .section { padding: 70px 0; }
  .nav-toggle { display: flex; }
  .nav-links {
    position: fixed;
    top: var(--nav-h);
    left: 0; right: 0;
    flex-direction: column;
    background: rgba(8, 4, 24, 0.97);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    padding: 24px;
    gap: 18px;
    border-bottom: 1px solid var(--border);
    transform: translateY(-120%);
    transition: transform .35s ease;
  }
  .nav-links.open { transform: translateY(0); }
  .services-grid, .pain-grid, .steps-grid, .engines-grid,
  .industry-grid, .team-grid, .coverage-grid, .plans-grid,
  .website-cases-grid, .news-grid { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .footer-inner { grid-template-columns: 1fr; gap: 28px; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .stat-number { font-size: 34px; }
  .article-card { padding: 28px 22px; }
  .article-pager { grid-template-columns: 1fr; }
  .hero-title { font-size: 34px; }
  .brand-name { font-size: 17px; }
  .contact-form-wrap { padding: 26px 20px; }
}

/* ============================================================
   ★★★ 视觉升级增强（2026 重构） ★★★
   ============================================================ */

/* ---------- 去 AI 感：各板块独特背景装饰 ---------- */
#website::before, #trend::before, #aigeo::before, #process::before,
#strength::before, #plans::before, #coverage::before, #cases::before,
#news::before, #team::before, #faq::before, #contact::before {
  content: '';
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 0;
}
/* 网站建设：右上青色径向光晕 */
#website::before {
  background: radial-gradient(600px 300px at 85% 0%, rgba(160, 104, 255, 0.08), transparent 70%);
}
/* 时代变局：紫色斜向光晕 + 虚线 */
#trend::before {
  background:
    radial-gradient(500px 320px at 10% 20%, rgba(160, 104, 255, 0.10), transparent 70%),
    radial-gradient(600px 400px at 90% 90%, rgba(255, 92, 122, 0.06), transparent 70%);
}
/* 破局之道：顶部虚线连接 */
#aigeo::before {
  background-image: linear-gradient(90deg, rgba(160, 104, 255, 0.15) 1px, transparent 1px);
  background-size: 40px 1px;
  background-repeat: no-repeat;
  background-position: top 40px center;
  opacity: .5;
}
/* 落地闭环：底部微光网格 */
#process::before {
  background:
    radial-gradient(700px 300px at 50% 100%, rgba(160, 104, 255, 0.07), transparent 70%);
}
/* 三大引擎：左侧竖光 */
#strength::before {
  background: linear-gradient(90deg, rgba(0, 229, 255, 0.05), transparent 30%);
}
/* 服务方案：紫色氛围 */
#plans::before {
  background: radial-gradient(600px 380px at 50% 0%, rgba(160, 104, 255, 0.10), transparent 70%);
}
/* 全域覆盖：圆点阵 */
#coverage::before {
  background-image: radial-gradient(rgba(160, 104, 255, 0.12) 1px, transparent 1px);
  background-size: 26px 26px;
  opacity: .35;
  mask-image: radial-gradient(ellipse at center, #000 40%, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse at center, #000 40%, transparent 75%);
}
/* 实战验证：底部青晕 */
#cases::before {
  background: radial-gradient(800px 300px at 50% 100%, rgba(160, 104, 255, 0.07), transparent 70%);
}
/* 新闻动态：右上角斜切光 */
#news::before {
  background: linear-gradient(135deg, rgba(160, 104, 255, 0.06), transparent 40%);
}
/* 团队：对角线光 */
#team::before {
  background: linear-gradient(120deg, rgba(160, 104, 255, 0.06), transparent 50%);
}
/* FAQ：左侧竖线氛围 */
#faq::before {
  background: linear-gradient(90deg, rgba(160, 104, 255, 0.06), transparent 25%);
}
/* 联系：底部渐变光 */
#contact::before {
  background: radial-gradient(700px 400px at 80% 100%, rgba(160, 104, 255, 0.08), transparent 70%);
}

/* section-tag 多样化 */
#trend .section-tag, #process .section-tag, #strength .section-tag,
#plans .section-tag, #coverage .section-tag, #cases .section-tag {
  background: transparent;
  border: none;
  border-left: 2px solid var(--cyan);
  border-radius: 0;
  padding: 4px 0 4px 14px;
  letter-spacing: 3px;
}
#website .section-tag, #news .section-tag, #team .section-tag,
#faq .section-tag, #contact .section-tag {
  border-bottom: 1px solid rgba(160, 104, 255, 0.3);
  border-radius: 50px;
}
#aigeo .section-tag {
  background: linear-gradient(135deg, rgba(160, 104, 255, 0.15), rgba(160, 104, 255, 0.12));
  border-color: rgba(160, 104, 255, 0.4);
}

/* ---------- 导航：移动端右侧滑入面板 ---------- */
@media (max-width: 768px) {
  .nav-links {
    top: 0;
    right: 0;
    left: auto;
    bottom: 0;
    width: 80%;
    max-width: 320px;
    flex-direction: column;
    justify-content: flex-start;
    align-items: flex-start;
    gap: 8px;
    padding: calc(var(--nav-h) + 24px) 28px 28px;
    background: rgba(5, 3, 18, 0.85);
    backdrop-filter: blur(24px) saturate(140%);
    -webkit-backdrop-filter: blur(24px) saturate(140%);
    border-left: 1px solid var(--border);
    border-bottom: none;
    transform: translateX(100%);
    transition: transform .45s cubic-bezier(.22, 1, .36, 1);
  }
  .nav-links.open { transform: translateX(0); box-shadow: -20px 0 60px rgba(0,0,0,.5); }
  .nav-links a {
    opacity: 0;
    transform: translateX(20px);
    transition: opacity .4s ease, transform .4s cubic-bezier(.22,1,.36,1);
    width: 100%;
    padding: 12px 0;
    font-size: 16px;
  }
  .nav-links.open a { opacity: 1; transform: translateX(0); }
  .nav-links.open a:nth-child(1) { transition-delay: .08s; }
  .nav-links.open a:nth-child(2) { transition-delay: .15s; }
  .nav-links.open a:nth-child(3) { transition-delay: .22s; }
  .nav-links.open a:nth-child(4) { transition-delay: .29s; }
  .nav-links.open a:nth-child(5) { transition-delay: .36s; }
  .nav-links.open a:nth-child(6) { transition-delay: .43s; }
  .nav-links a:not(.nav-cta)::after { display: none; }
}

/* ---------- 1. 数据统计：发光数字（增强） ---------- */
.stat-number {
  filter: drop-shadow(0 0 14px rgba(160, 104, 255, 0.35));
}

/* ---------- 2. 网站建设：液体玻璃边框 + 光带扫过 + 图标旋转 ---------- */
.service-card { overflow: hidden; }
/* 液体玻璃渐变边框（mask 实现） */
.service-card::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: var(--radius);
  padding: 1px;
  background: linear-gradient(135deg, rgba(160,104,255,.5), rgba(160,104,255,.25) 45%, rgba(0,229,255,.4));
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  opacity: .35;
  transition: opacity .35s;
  height: auto;
  top: 0;
  bottom: 0;
}
.service-card:hover::before { opacity: 1; }
/* 顶部光带扫过 */
.service-card::after {
  content: '';
  position: absolute;
  top: 0; left: -60%;
  width: 40%;
  height: 100%;
  background: linear-gradient(100deg, transparent, rgba(160, 104, 255, 0.18), transparent);
  transform: skewX(-20deg);
  transition: left .7s ease;
  pointer-events: none;
}
.service-card:hover::after { left: 130%; }
/* 图标 hover 旋转 */
.service-card .service-icon { transition: transform .5s cubic-bezier(.22,1,.36,1); }
.service-card:hover .service-icon { transform: rotate(12deg) scale(1.15); }

/* ---------- 3. 网站案例：底部遮罩滑入 + 左侧滑入 ---------- */
.website-cases-grid .reveal { transform: translateX(-50px); }
.website-cases-grid .reveal.active { transform: translateX(0); }
.case-screenshot::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(6,10,20,0) 40%, rgba(160, 104, 255, 0.55) 100%);
  opacity: 0;
  transform: translateY(100%);
  transition: opacity .4s, transform .45s cubic-bezier(.22,1,.36,1);
  display: flex;
  align-items: flex-end;
  justify-content: center;
  z-index: 2;
}
.website-case-card:hover .case-screenshot::after { opacity: 1; transform: translateY(0); }
.case-screenshot::before {
  content: '查看详情 →';
  position: absolute;
  left: 0; right: 0; bottom: 18px;
  text-align: center;
  color: #04121f;
  font-weight: 700;
  font-size: 14px;
  z-index: 3;
  opacity: 0;
  transform: translateY(10px);
  transition: opacity .35s .1s, transform .35s .1s;
}
.website-case-card:hover .case-screenshot::before { opacity: 1; transform: translateY(0); }

/* ---------- 4. 时代变局：痛点红色发光 + 时间线绘制 ---------- */
.pain-card {
  transition: transform .3s, box-shadow .3s, border-color .3s;
}
.pain-card:hover {
  border-color: rgba(255, 92, 122, 0.6) !important;
  box-shadow: 0 0 20px rgba(255, 92, 122, 0.3), 0 12px 40px rgba(0,0,0,.4) !important;
}
/* 时间线竖线绘制 */
.timeline::before {
  height: auto;
  transform: scaleY(0);
  transform-origin: top;
  transition: transform 1.5s cubic-bezier(.22,1,.36,1) .2s;
}
.timeline.active::before { transform: scaleY(1); }
.timeline-item::before {
  opacity: 0;
  transform: scale(0);
  transition: opacity .4s ease, transform .4s cubic-bezier(.22,1,.36,1);
}
.timeline.active .timeline-item::before { opacity: 1; transform: scale(1); }
.timeline.active .timeline-item:nth-child(1)::before { transition-delay: .3s; }
.timeline.active .timeline-item:nth-child(2)::before { transition-delay: .55s; }
.timeline.active .timeline-item:nth-child(3)::before { transition-delay: .8s; }
.timeline.active .timeline-item:nth-child(4)::before { transition-delay: 1.05s; }

/* ---------- 5. 破局之道：左右滑入 + VS 脉冲 ---------- */
.reveal-side {
  opacity: 0;
  transition: opacity .7s ease, transform .8s cubic-bezier(.22,1,.36,1);
}
.reveal-left { transform: translateX(-60px); }
.reveal-right { transform: translateX(60px); }
.reveal-side.active { opacity: 1; transform: translateX(0); }
.comparison-wrap { position: relative; }
.comparison-vs {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 56px; height: 56px;
  border-radius: 50%;
  background: var(--gradient-main);
  color: #04121f;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 16px;
  z-index: 3;
  box-shadow: 0 0 24px rgba(160, 104, 255, 0.5);
  animation: vsPulse 2s ease-in-out infinite;
}
@keyframes vsPulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(160, 104, 255, 0.5); }
  50% { box-shadow: 0 0 0 14px rgba(160, 104, 255, 0); }
}
@media (max-width: 768px) {
  .comparison-vs { position: static; transform: none; margin: 8px auto; }
  .comparison-wrap { grid-template-columns: 1fr; gap: 18px; }
}

/* ---------- 6. 五部曲：SVG 连线绘制 + 图标点亮 ---------- */
.steps-grid { position: relative; }
.steps-connector { display: none; }
@media (min-width: 993px) {
  .steps-connector {
    display: block;
    position: absolute;
    top: 92px;
    left: 14%;
    width: 72%;
    height: 4px;
    z-index: 0;
    overflow: visible;
  }
  .steps-line {
    stroke: rgba(160, 104, 255, 0.4);
    stroke-width: 2;
    stroke-dasharray: 1000;
    stroke-dashoffset: 1000;
    transition: stroke-dashoffset 1.8s ease .3s;
  }
  .steps-grid.drawn .steps-line { stroke-dashoffset: 0; }
}
.step-card { z-index: 1; }
.step-icon {
  opacity: .35;
  filter: grayscale(.7);
  transition: opacity .5s ease, filter .5s ease;
}
.steps-grid.drawn .step-card .step-icon { opacity: 1; filter: grayscale(0); }
.steps-grid.drawn .step-card:nth-of-type(1) .step-icon { transition-delay: .3s; }
.steps-grid.drawn .step-card:nth-of-type(2) .step-icon { transition-delay: .45s; }
.steps-grid.drawn .step-card:nth-of-type(3) .step-icon { transition-delay: .6s; }
.steps-grid.drawn .step-card:nth-of-type(4) .step-icon { transition-delay: .75s; }
.steps-grid.drawn .step-card:nth-of-type(5) .step-icon { transition-delay: .9s; }
.step-card.icon-lit .step-icon { animation: stepPulse .6s ease; }
@keyframes stepPulse {
  0% { transform: scale(1); }
  50% { transform: scale(1.25); }
  100% { transform: scale(1); }
}

/* ---------- 7. 三大引擎：浮起发光 + 图标慢转加速 ---------- */
.engine-card:hover { transform: translateY(-8px); }
.engine-icon {
  display: inline-block;
  animation: iconSpin 20s linear infinite;
}
.engine-card:hover .engine-icon { animation-duration: 3s; }
@keyframes iconSpin { to { transform: rotate(360deg); } }
.advantage-item { position: relative; overflow: hidden; }
.advantage-item::before {
  content: '';
  position: absolute;
  left: 0; top: 0; bottom: 0;
  width: 3px;
  background: var(--gradient-main);
  transform: scaleY(0);
  transform-origin: top;
  transition: transform .35s cubic-bezier(.22,1,.36,1);
}
.advantage-item:hover::before { transform: scaleY(1); }
.advantage-item:hover { border-color: rgba(160, 104, 255, 0.35); }

/* ---------- 8. 服务方案：推荐呼吸 + 非推荐上浮 ---------- */
.plan-featured {
  transform: scale(1.03);
  animation: planBreath 3.2s ease-in-out infinite;
}
@keyframes planBreath {
  0%, 100% { box-shadow: 0 0 40px rgba(160, 104, 255, 0.18); }
  50% { box-shadow: 0 0 70px rgba(160, 104, 255, 0.42); }
}
.plan-card:not(.plan-featured):hover { transform: translateY(-8px); border-color: rgba(160, 104, 255, 0.35); }

/* ---------- 9. 全域覆盖：图标墙 + 波纹 ---------- */
.platforms-showcase {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(130px, 1fr));
  gap: 16px;
}
.platform-item {
  position: relative;
  padding: 20px 12px;
  text-align: center;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.platform-item::after {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  border: 1px solid var(--cyan);
  opacity: 0;
  pointer-events: none;
}
.platform-item:hover {
  transform: scale(1.12);
  z-index: 2;
  border-color: var(--cyan);
  color: var(--cyan);
  box-shadow: 0 0 24px rgba(160, 104, 255, 0.35);
}
.platform-item:hover::after { animation: ripple .6s ease-out; }
@keyframes ripple {
  from { opacity: .8; transform: scale(1); }
  to { opacity: 0; transform: scale(1.45); }
}
.coverage-card:hover { transform: translateY(-6px); }
.coverage-card .coverage-icon { transition: transform .4s cubic-bezier(.22,1,.36,1); }
.coverage-card:hover .coverage-icon { transform: scale(1.2) rotate(-8deg); }

/* ---------- 10. 实战验证：marquee 暂停 + 客户高亮 + 行业弹跳 ---------- */
.clients-marquee:hover .marquee-track { animation-play-state: paused; }
.client-name {
  transition: color .25s, font-size .25s, background .25s;
  padding: 4px 12px;
  border-radius: 8px;
}
.client-name:hover {
  color: var(--cyan);
  font-size: 18px;
  background: rgba(160, 104, 255, 0.1);
}
.industry-card .industry-icon { transition: transform .3s; }
.industry-card:hover .industry-icon { animation: iconBounce .55s ease; }
@keyframes iconBounce {
  0%, 100% { transform: translateY(0); }
  40% { transform: translateY(-12px) scale(1.15); }
  70% { transform: translateY(2px); }
}
.trusted-bar {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  gap: 8px;
}
.trusted-name {
  background: rgba(255, 255, 255, 0.05);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border: 1px solid var(--border);
  padding: 6px 16px;
  border-radius: 50px;
}

/* ---------- 11. 团队：3D 翻转 ---------- */
.team-card {
  padding: 0;
  background: transparent;
  border: none;
  overflow: visible;
  perspective: 1200px;
  min-height: 260px;
}
.team-card::before { display: none; }
.team-card-inner {
  position: relative;
  width: 100%;
  height: 100%;
  min-height: 260px;
  transform-style: preserve-3d;
  transition: transform .7s cubic-bezier(.22, 1, .36, 1);
}
.team-card:hover .team-card-inner,
.team-card.flipped .team-card-inner { transform: rotateY(180deg); }
.team-card-front,
.team-card-back {
  position: absolute;
  inset: 0;
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--bg-card);
  backdrop-filter: blur(10px);
  padding: 32px 26px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
}
.team-card-front { box-shadow: inset 0 1px 0 rgba(255,255,255,.05); }
.team-card-back {
  transform: rotateY(180deg);
  background: linear-gradient(160deg, rgba(160, 104, 255, 0.14), rgba(160, 104, 255, 0.10));
  border-color: rgba(160, 104, 255, 0.45);
  box-shadow: 0 0 40px rgba(160, 104, 255, 0.2);
}
.team-flip-hint { margin-top: 14px; font-size: 12px; color: var(--text-mute); }
.team-card:hover { border-color: transparent; box-shadow: none; }

/* ---------- 12. FAQ：序号 + 内容淡入 ---------- */
.faq-q-wrap { display: flex; align-items: center; gap: 16px; flex: 1; min-width: 0; }
.faq-num {
  color: var(--cyan);
  font-size: 16px;
  font-weight: 700;
  flex-shrink: 0;
  opacity: .85;
  text-shadow: 0 0 10px rgba(160, 104, 255, 0.4);
}
.faq-q-text { min-width: 0; }
.faq-item.open .faq-answer { animation: faqFade .45s ease; }
@keyframes faqFade {
  from { opacity: 0; transform: translateY(-8px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ---------- 13. 新闻：标题上浮 + 底部遮罩 ---------- */
.news-card { position: relative; }
.news-cover { overflow: hidden; }
.news-cover::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 55%, rgba(5, 2, 18, 0.85));
  opacity: 0;
  transition: opacity .35s ease;
  z-index: 1;
  pointer-events: none;
}
.news-card:hover .news-cover::after { opacity: 1; }
.news-heading { transition: transform .35s ease; }
.news-card:hover .news-heading { transform: translateY(-4px); }
.eye-icon {
  width: 15px; height: 15px;
  vertical-align: -2px;
  margin-right: 5px;
}
.news-views { display: inline-flex; align-items: center; }

/* ---------- 14. 联系：玻璃表单 + 输入发光 + 粒子 ---------- */
.contact-form-wrap {
  background: rgba(18, 10, 44, 0.5);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border: 1px solid var(--border);
  position: relative;
  overflow: hidden;
}
/* 渐变边框 */
.contact-form-wrap::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: 20px;
  padding: 1px;
  background: linear-gradient(135deg, rgba(160,104,255,.45), transparent 40%, rgba(160,104,255,.35));
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  pointer-events: none;
}
.input-wrap { position: relative; }
.input-icon {
  position: absolute;
  left: 15px;
  top: 50%;
  transform: translateY(-50%);
  width: 18px; height: 18px;
  color: var(--text-mute);
  pointer-events: none;
  transition: color .25s;
}
.form-group:has(textarea) .input-icon { top: 18px; transform: none; }
.input-wrap input,
.input-wrap textarea { padding-left: 46px; }
.input-wrap textarea { padding-top: 13px; }
.input-wrap:focus-within .input-icon { color: var(--cyan); }
.input-wrap input:focus,
.input-wrap textarea:focus {
  box-shadow: 0 0 0 3px rgba(160, 104, 255, 0.15), 0 0 18px rgba(160, 104, 255, 0.18);
}
.ci-icon { transition: transform .4s cubic-bezier(.22,1,.36,1), box-shadow .4s, background .4s; }
.contact-list li:hover .ci-icon {
  transform: rotate(8deg) scale(1.1);
  background: rgba(160, 104, 255, 0.2);
  box-shadow: 0 0 16px rgba(160, 104, 255, 0.4);
}
/* 提交成功粒子 */
.submit-particle {
  position: absolute;
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--teal);
  pointer-events: none;
  z-index: 5;
  animation: particleBurst .9s ease-out forwards;
}
@keyframes particleBurst {
  0% { opacity: 1; transform: translate(0, 0) scale(1); }
  100% { opacity: 0; transform: translate(var(--dx), var(--dy)) scale(.3); }
}
#submitBtn.success {
  background: linear-gradient(135deg, #00c98e, #00E5FF);
  box-shadow: 0 0 30px rgba(0, 229, 255, 0.5);
}

/* ---------- 响应式降级：移动端复杂动画简化 ---------- */
@media (max-width: 768px) {
  .engine-icon { animation: none; }
  .engine-card:hover .engine-icon { animation: none; }
  .platform-item:hover { transform: scale(1.05); }
  .plan-featured { transform: scale(1); }
  .pain-card:hover { box-shadow: 0 0 14px rgba(255,92,122,.25) !important; }
  .section { padding: 70px 0; }
}

/* ---------- 尊重减少动画偏好（增强） ---------- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .01ms !important;
  }
  html { scroll-behavior: auto; }
  .reveal, .reveal-side { opacity: 1; transform: none; }
  .timeline::before { transform: none; }
  .steps-line { stroke-dashoffset: 0; }
  .page-loader { display: none; }
}

/* ============================================================
   ★★★ v4.3 纯CSS 3D 背景层（浮动光晕 + 呼吸光斑） ★★★
   无 Three.js · GPU 加速（transform / opacity）
   ============================================================ */
.bg-3d {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  overflow: hidden;
}
.bg-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(60px);
  will-change: transform, opacity;
}
.bg-orb-1 {
  width: 520px; height: 520px;
  top: -120px; left: -100px;
  background: radial-gradient(circle, rgba(160, 104, 255, 0.22), transparent 70%);
  animation: orbFloat1 26s ease-in-out infinite;
}
.bg-orb-2 {
  width: 460px; height: 460px;
  top: 28%; right: -140px;
  background: radial-gradient(circle, rgba(0, 229, 255, 0.12), transparent 70%);
  animation: orbFloat2 32s ease-in-out infinite;
}
.bg-orb-3 {
  width: 600px; height: 600px;
  bottom: -220px; left: 18%;
  background: radial-gradient(circle, rgba(160, 104, 255, 0.16), transparent 70%);
  animation: orbFloat3 38s ease-in-out infinite;
}
.bg-orb-4 {
  width: 380px; height: 380px;
  top: 55%; left: -120px;
  background: radial-gradient(circle, rgba(120, 80, 255, 0.14), transparent 70%);
  animation: orbFloat4 24s ease-in-out infinite;
}
@keyframes orbFloat1 {
  0%, 100% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(60px, 40px) scale(1.1); }
}
@keyframes orbFloat2 {
  0%, 100% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(-70px, 60px) scale(1.08); }
}
@keyframes orbFloat3 {
  0%, 100% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(50px, -50px) scale(1.12); }
}
@keyframes orbFloat4 {
  0%, 100% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(80px, -30px) scale(0.95); }
}

/* 顶部呼吸光斑（左上紫色光源） */
.bg-glow-top {
  position: absolute;
  top: -180px; left: 40%;
  transform: translateX(-50%);
  width: 900px; height: 480px;
  background: radial-gradient(ellipse at center, rgba(160, 104, 255, 0.18), transparent 70%);
  filter: blur(40px);
  animation: glowBreathe 8s ease-in-out infinite;
}
@keyframes glowBreathe {
  0%, 100% { opacity: 0.55; }
  50% { opacity: 1; }
}

/* 移动端减少光晕数量与尺寸 */
@media (max-width: 768px) {
  .bg-orb-2, .bg-orb-4 { display: none; }
  .bg-orb-1 { width: 340px; height: 340px; }
  .bg-orb-3 { width: 420px; height: 420px; }
}

/* 尊重减少动画偏好：关闭背景浮动 */
@media (prefers-reduced-motion: reduce) {
  .bg-orb, .bg-glow-top { animation: none !important; }
}

/* ============================================================
   v5.0 新增：子页面标题区 / 导航高亮 / 整卡链接 / 辅助布局
   ============================================================ */

/* ---------- 子页面统一页头（赛博紫玻璃拟态） ---------- */
.page-hero {
  position: relative;
  padding: 120px 0 60px;
  text-align: center;
  overflow: hidden;
}
.page-hero-glow {
  position: absolute;
  top: -120px; left: 50%;
  transform: translateX(-50%);
  width: 760px; height: 360px;
  background: radial-gradient(ellipse at center, rgba(160, 104, 255, 0.28), transparent 70%);
  filter: blur(50px);
  pointer-events: none;
  z-index: 0;
}
.page-hero-inner { position: relative; z-index: 1; }
.page-hero-tag {
  display: inline-block;
  padding: 6px 18px;
  border-radius: 50px;
  background: rgba(160, 104, 255, 0.12);
  border: 1px solid var(--border);
  color: var(--cyan);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: .12em;
  margin-bottom: 22px;
  backdrop-filter: blur(10px);
}
.page-hero-title {
  font-family: 'Urbanist', 'Inter', sans-serif;
  font-size: 48px;
  font-weight: 800;
  line-height: 1.15;
  background: linear-gradient(135deg, #ffffff 20%, #c9b3ff 60%, #00E5FF 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-bottom: 18px;
}
.page-hero-subtitle {
  color: var(--text-dim);
  font-size: 17px;
  max-width: 720px;
  margin: 0 auto;
}

/* ---------- 导航当前项高亮 ---------- */
.nav-links a.active {
  color: var(--text);
}
.nav-links a.active::after {
  transform: scaleX(1) !important;
}

/* ---------- 案例整卡链接 ---------- */
.case-link-wrap {
  display: flex;
  flex-direction: column;
  height: 100%;
  color: inherit;
}
.case-link-wrap:hover { color: inherit; }

/* case-features 改为 ul/li 语义化后，保持原胶囊标签样式 */
.case-features { list-style: none; padding: 0; }
.case-features li {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 4px;
  background: rgba(255, 255, 255, 0.06);
  font-size: 12px;
  color: var(--text-dim);
}

/* ---------- 新页面辅助布局 ---------- */
.section-more {
  margin-top: 36px;
  text-align: center;
}
.center-cta {
  text-align: center;
}
.center-cta .section-title { margin-bottom: 12px; }
.center-cta .section-desc { margin-bottom: 28px; }
.center-cta .section-tag { margin-bottom: 14px; }

/* 小屏适配子页面标题 */
@media (max-width: 768px) {
  .page-hero { padding: 100px 0 44px; }
  .page-hero-title { font-size: 34px; }
  .page-hero-subtitle { font-size: 15px; }
}