/* ============================================================
   晨幻AI · 企业AI定制开发 获客站 v2
   视觉：深空蓝 + 科技蓝/青绿渐变 + 琥珀点缀 · 企业级高端
   ============================================================ */
:root {
  --bg: #F7F9FD;
  --bg-alt: #EEF2F9;
  --bg-dark: #070D1A;
  --bg-dark-2: #0B1526;
  --bg-card: #0F1B30;
  --ink: #14213C;
  --ink-2: #46566F;
  --ink-3: #7A89A3;
  --line: #E2E9F4;
  --line-dark: rgba(255,255,255,.08);
  --brand: #2E7CF6;
  --brand-2: #17C9A6;
  --gold: #F5B544;
  --grad: linear-gradient(100deg, #2E7CF6 0%, #17C9A6 100%);
  --grad-gold: linear-gradient(100deg, #F5B544, #F7D08A);
  --shadow-sm: 0 1px 2px rgba(7,13,26,.04), 0 6px 20px rgba(7,13,26,.06);
  --shadow-md: 0 14px 40px rgba(7,13,26,.10);
  --shadow-lg: 0 30px 80px rgba(7,13,26,.16);
  --radius: 16px;
  --radius-lg: 22px;
  --font: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Segoe UI", Roboto, sans-serif;
  --mono: "SF Mono", "JetBrains Mono", Consolas, monospace;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { font-family: var(--font); color: var(--ink); background: var(--bg); line-height: 1.65; -webkit-font-smoothing: antialiased; overflow-x: hidden; }
img, svg { display: block; }
a { color: inherit; text-decoration: none; }
button { font-family: inherit; cursor: pointer; }
ul, ol { list-style: none; }
::selection { background: rgba(46,124,246,.2); }
.container { width: min(1200px, 92%); margin: 0 auto; }
.container-narrow { width: min(880px, 92%); }
.hide-mobile { display: inline; }

/* ---------- 通用 ---------- */
.section { padding: 96px 0; }
.section-alt { background: var(--bg-alt); }
.section-head { text-align: center; max-width: 720px; margin: 0 auto 54px; }
.section-tag {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 12.5px; font-weight: 600; color: var(--brand); letter-spacing: 1.5px;
  background: rgba(46,124,246,.08); border: 1px solid rgba(46,124,246,.2);
  padding: 5px 16px; border-radius: 999px;
}
.section-tag::before { content: ""; width: 6px; height: 6px; border-radius: 50%; background: var(--grad); }
.section-title { font-size: clamp(27px, 3.6vw, 40px); font-weight: 800; line-height: 1.22; margin: 18px 0 14px; letter-spacing: -.5px; }
.section-desc { color: var(--ink-2); font-size: 15.5px; }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  font-size: 15px; font-weight: 600; padding: 14px 28px; border-radius: 12px;
  border: 1px solid transparent; transition: transform .18s ease, box-shadow .18s ease, background .18s ease;
}
.btn svg { width: 17px; height: 17px; stroke: currentColor; stroke-width: 2; fill: none; stroke-linecap: round; stroke-linejoin: round; }
.btn:active { transform: translateY(1px); }
.btn-primary { background: var(--grad); color: #fff; box-shadow: 0 8px 24px rgba(46,124,246,.32); }
.btn-primary:hover { box-shadow: 0 12px 34px rgba(46,124,246,.45); transform: translateY(-2px); }
.btn-ghost { background: rgba(255,255,255,.06); color: #fff; border-color: rgba(255,255,255,.24); backdrop-filter: blur(8px); }
.btn-ghost:hover { background: rgba(255,255,255,.12); transform: translateY(-2px); }
.btn-outline { background: #fff; color: var(--brand); border-color: rgba(46,124,246,.4); box-shadow: var(--shadow-sm); }
.btn-outline:hover { background: rgba(46,124,246,.06); transform: translateY(-2px); }
.btn-block { width: 100%; }

/* ---------- 顶部导航 ---------- */
.site-header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  transition: background .25s ease, box-shadow .25s ease, border-color .25s ease;
  border-bottom: 1px solid transparent;
}
.site-header.scrolled { background: rgba(255,255,255,.86); backdrop-filter: blur(16px); border-color: var(--line); box-shadow: var(--shadow-sm); }
.nav-wrap { display: flex; align-items: center; justify-content: space-between; height: 70px; }
.brand { display: flex; align-items: center; gap: 10px; }
.brand-mark { width: 34px; height: 34px; flex: 0 0 auto; }
.brand-text { font-size: 20px; font-weight: 800; letter-spacing: .2px; color: #fff; transition: color .25s ease; }
.brand-ai { background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; }
.brand-sub { font-size: 12px; font-weight: 500; color: rgba(255,255,255,.6); margin-left: 10px; padding-left: 10px; border-left: 1px solid rgba(255,255,255,.18); }
.site-header.scrolled .brand-text { color: var(--ink); }
.site-header.scrolled .brand-sub { color: var(--ink-3); border-color: var(--line); }
.site-nav { display: flex; align-items: center; gap: 32px; }
.site-nav a { font-size: 14.5px; font-weight: 500; color: rgba(255,255,255,.82); transition: color .15s ease; position: relative; }
.site-nav a:not(.nav-cta)::after { content: ""; position: absolute; left: 0; bottom: -6px; width: 0; height: 2px; border-radius: 2px; background: var(--grad); transition: width .2s ease; }
.site-nav a:not(.nav-cta):hover::after { width: 100%; }
.site-nav a:hover { color: #fff; }
.site-header.scrolled .site-nav a { color: var(--ink-2); }
.site-header.scrolled .site-nav a:hover { color: var(--ink); }
.site-nav .nav-cta { color: #fff; background: var(--grad); padding: 10px 20px; border-radius: 10px; font-weight: 600; box-shadow: 0 5px 16px rgba(46,124,246,.35); }
.site-header.scrolled .site-nav .nav-cta { color: #fff; }
.nav-toggle { display: none; background: none; border: 0; width: 40px; height: 40px; flex-direction: column; align-items: center; justify-content: center; gap: 5px; }
.nav-toggle span { width: 22px; height: 2px; background: #fff; border-radius: 2px; transition: transform .22s ease, opacity .22s ease; }
.site-header.scrolled .nav-toggle span { background: var(--ink); }
.nav-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ---------- Hero ---------- */
.hero { position: relative; background: var(--bg-dark); color: #fff; padding: 168px 0 120px; overflow: hidden; }
.hero-bg { position: absolute; inset: 0; pointer-events: none; }
.hero-grid {
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.04) 1px, transparent 1px);
  background-size: 54px 54px;
  mask-image: radial-gradient(ellipse 80% 65% at 50% 25%, #000 25%, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse 80% 65% at 50% 25%, #000 25%, transparent 75%);
}
.hero-blob { position: absolute; border-radius: 50%; filter: blur(110px); animation: float 12s ease-in-out infinite; }
.b1 { width: 560px; height: 560px; background: rgba(46,124,246,.40); top: -180px; left: -120px; }
.b2 { width: 480px; height: 480px; background: rgba(23,201,166,.22); bottom: -160px; right: -80px; animation-delay: -4s; }
.b3 { width: 320px; height: 320px; background: rgba(245,181,68,.12); top: 40%; right: 30%; animation-delay: -8s; }
@keyframes float { 0%,100% { transform: translateY(0) scale(1); } 50% { transform: translateY(-30px) scale(1.06); } }
.hero-noise { position: absolute; inset: 0; opacity: .5; background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='120' height='120'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2'/%3E%3CfeColorMatrix values='0 0 0 0 1 0 0 0 0 1 0 0 0 0 1 0 0 0 0.03 0'/%3E%3C/filter%3E%3Crect width='120' height='120' filter='url(%23n)'/%3E%3C/svg%3E"); mix-blend-mode: overlay; }
.hero-inner { position: relative; z-index: 2; display: grid; grid-template-columns: 1.05fr .95fr; gap: 60px; align-items: center; }
.hero-badge {
  display: inline-flex; align-items: center; gap: 10px; font-size: 13px; font-weight: 500;
  color: rgba(255,255,255,.85); background: rgba(255,255,255,.06); border: 1px solid rgba(255,255,255,.14);
  padding: 7px 16px; border-radius: 999px; margin-bottom: 26px; backdrop-filter: blur(6px);
}
.pulse-dot { width: 8px; height: 8px; border-radius: 50%; background: #3BD6A6; position: relative; flex: 0 0 auto; }
.pulse-dot::after { content: ""; position: absolute; inset: -4px; border-radius: 50%; border: 1px solid #3BD6A6; animation: pulse 1.8s ease-out infinite; }
@keyframes pulse { 0% { transform: scale(.6); opacity: 1; } 100% { transform: scale(1.7); opacity: 0; } }
.hero-title { font-size: clamp(34px, 4.6vw, 54px); font-weight: 800; line-height: 1.16; letter-spacing: -1px; }
.grad-text { background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; }
.hero-sub { font-size: clamp(15.5px, 1.8vw, 18px); color: rgba(255,255,255,.66); margin: 22px 0 34px; max-width: 560px; line-height: 1.8; }
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; }
.hero-trust { display: flex; flex-direction: column; gap: 10px; margin-top: 42px; }
.hero-trust li { display: flex; align-items: center; gap: 9px; font-size: 13.5px; color: rgba(255,255,255,.62); }
.hero-trust svg { width: 15px; height: 15px; stroke: #3BD6A6; stroke-width: 2.6; fill: none; flex: 0 0 auto; }

/* ---------- Hero 右侧仪表盘示意 ---------- */
.hero-right { position: relative; }
.mock-stage { position: relative; perspective: 1200px; }
.mock-tag { position: absolute; top: -30px; right: 4px; font-size: 11.5px; color: rgba(255,255,255,.4); letter-spacing: .5px; }
.mock-main {
  position: relative; background: linear-gradient(160deg, rgba(255,255,255,.10), rgba(255,255,255,.04));
  border: 1px solid rgba(255,255,255,.14); border-radius: 18px; padding: 18px;
  backdrop-filter: blur(14px); box-shadow: 0 30px 70px rgba(0,0,0,.45);
  transform: rotateY(-4deg) rotateX(1deg); transition: transform .3s ease;
}
.mock-stage:hover .mock-main { transform: rotateY(-1deg) rotateX(0deg); }
.mock-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 14px; }
.mock-title { display: flex; align-items: center; gap: 10px; }
.mock-dot { width: 10px; height: 10px; border-radius: 3px; background: var(--grad); }
.mock-title b { display: block; font-size: 13.5px; color: #EAF1FC; letter-spacing: .3px; }
.mock-title small { font-size: 11px; color: rgba(255,255,255,.45); }
.mock-live { display: flex; align-items: center; gap: 6px; font-size: 10.5px; font-weight: 700; color: #3BD6A6; letter-spacing: 1px; }
.mock-live i { width: 7px; height: 7px; border-radius: 50%; background: #3BD6A6; box-shadow: 0 0 0 3px rgba(59,214,166,.18); animation: blink 1.6s infinite; }
@keyframes blink { 50% { opacity: .35; } }
.mock-chart { display: flex; align-items: flex-end; gap: 8px; height: 110px; padding: 10px 6px 0; margin-bottom: 14px; border-radius: 10px; background: rgba(0,0,0,.22); }
.chart-bar { flex: 1; border-radius: 4px 4px 2px 2px; background: linear-gradient(180deg, #2E7CF6, rgba(46,124,246,.25)); animation: grow 1s ease backwards; transform-origin: bottom; }
.chart-bar:nth-child(2n) { background: linear-gradient(180deg, #17C9A6, rgba(23,201,166,.22)); }
.chart-bar:nth-child(1) { animation-delay: .05s; } .chart-bar:nth-child(2) { animation-delay: .1s; }
.chart-bar:nth-child(3) { animation-delay: .15s; } .chart-bar:nth-child(4) { animation-delay: .2s; }
.chart-bar:nth-child(5) { animation-delay: .25s; } .chart-bar:nth-child(6) { animation-delay: .3s; }
.chart-bar:nth-child(7) { animation-delay: .35s; } .chart-bar:nth-child(8) { animation-delay: .4s; }
.chart-bar:nth-child(9) { animation-delay: .45s; } .chart-bar:nth-child(10) { animation-delay: .5s; }
@keyframes grow { from { transform: scaleY(0); } to { transform: scaleY(1); } }
.mock-chat { display: grid; gap: 8px; }
.mc-bubble { max-width: 85%; padding: 9px 13px; border-radius: 12px; font-size: 12.5px; line-height: 1.55; }
.mc-bubble span { color: #E4ECF8; }
.mc-in { justify-self: start; background: rgba(255,255,255,.10); border-bottom-left-radius: 3px; }
.mc-out { justify-self: end; background: linear-gradient(100deg, rgba(46,124,246,.55), rgba(23,201,166,.45)); border-bottom-right-radius: 3px; }
.mock-card {
  position: absolute; display: flex; align-items: center; gap: 10px;
  background: rgba(15,27,48,.92); border: 1px solid rgba(255,255,255,.12); border-radius: 14px;
  padding: 12px 16px; box-shadow: 0 18px 44px rgba(0,0,0,.4); backdrop-filter: blur(10px);
  animation: floatY 5s ease-in-out infinite;
}
.mock-card svg { width: 20px; height: 20px; stroke: #6FB1FF; stroke-width: 1.8; fill: none; }
.mock-card b { display: block; font-size: 11.5px; color: rgba(255,255,255,.55); font-weight: 500; }
.mock-card span { display: block; font-size: 16px; font-weight: 800; color: #fff; letter-spacing: -.2px; }
.mc1 { top: -26px; right: -16px; animation-delay: -1s; }
.mc2 { bottom: 62px; left: -30px; animation-delay: -2.5s; }
.mc3 { bottom: -22px; right: 6px; animation-delay: -4s; }
.mc2 span { color: #3BD6A6; }
.mc3 span { color: #F5B544; }
@keyframes floatY { 0%,100% { transform: translateY(0); } 50% { transform: translateY(-12px); } }
.hero-wave {
  position: absolute; left: 0; right: 0; bottom: -1px; height: 60px; background: var(--bg);
  clip-path: polygon(0 60%, 10% 48%, 20% 60%, 32% 44%, 44% 60%, 56% 42%, 68% 58%, 80% 46%, 92% 60%, 100% 48%, 100% 100%, 0 100%);
}

/* ---------- 数据条 ---------- */
.stats-bar { background: var(--bg); border-bottom: 1px solid var(--line); }
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; padding: 44px 0; }
.stat { text-align: center; }
.stat b { display: block; font-size: clamp(30px, 3.6vw, 42px); font-weight: 800; letter-spacing: -1px; background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; }
.stat span { font-size: 13.5px; color: var(--ink-3); }

/* ---------- 能力卡片 ---------- */
.cards-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.card {
  position: relative; background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  padding: 26px 24px 24px; box-shadow: var(--shadow-sm); overflow: hidden;
  transition: transform .2s ease, box-shadow .2s ease, border-color .2s ease;
}
.card::before { content: ""; position: absolute; top: 0; left: 0; right: 0; height: 3px; background: var(--grad); opacity: 0; transition: opacity .2s ease; }
.card:hover { transform: translateY(-5px); box-shadow: var(--shadow-md); border-color: rgba(46,124,246,.35); }
.card:hover::before { opacity: 1; }
.card-num { position: absolute; top: 18px; right: 20px; font-family: var(--mono); font-size: 26px; font-weight: 800; color: rgba(20,33,60,.07); }
.card-icon { width: 46px; height: 46px; border-radius: 13px; display: flex; align-items: center; justify-content: center; margin-bottom: 16px; }
.card-icon svg { width: 23px; height: 23px; stroke: #fff; stroke-width: 1.8; fill: none; stroke-linecap: round; stroke-linejoin: round; }
.ic-blue { background: linear-gradient(135deg, #2E7CF6, #5FA1FF); box-shadow: 0 6px 16px rgba(46,124,246,.3); }
.ic-teal { background: linear-gradient(135deg, #0FA08F, #3BD6A6); box-shadow: 0 6px 16px rgba(23,201,166,.28); }
.card h3 { font-size: 16.5px; font-weight: 700; margin-bottom: 9px; line-height: 1.4; }
.card p { font-size: 13.5px; color: var(--ink-2); }
.card-points { margin-top: 14px; padding-top: 13px; border-top: 1px dashed var(--line); display: grid; gap: 6px; }
.card-points li { font-size: 12.5px; color: var(--ink-3); padding-left: 18px; position: relative; }
.card-points li::before { content: ""; position: absolute; left: 0; top: 6px; width: 8px; height: 8px; border-radius: 3px; background: var(--grad); }

/* ---------- 案例 ---------- */
.case-filter { display: flex; gap: 10px; justify-content: center; flex-wrap: wrap; margin-bottom: 36px; }
.cf-btn {
  font-size: 13.5px; font-weight: 600; color: var(--ink-2); background: #fff; border: 1px solid var(--line);
  padding: 8px 20px; border-radius: 999px; transition: all .18s ease; box-shadow: var(--shadow-sm);
}
.cf-btn:hover { border-color: rgba(46,124,246,.4); color: var(--brand); }
.cf-btn.on { background: var(--grad); color: #fff; border-color: transparent; box-shadow: 0 6px 18px rgba(46,124,246,.3); }
.cases-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; }
.case-card {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  padding: 24px 24px 20px; box-shadow: var(--shadow-sm); display: flex; flex-direction: column;
  transition: transform .2s ease, box-shadow .2s ease, opacity .3s ease;
}
.case-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.case-card.hide { display: none; }
.case-top { display: flex; align-items: center; justify-content: space-between; margin-bottom: 13px; }
.case-badge { font-size: 11.5px; font-weight: 600; color: var(--brand); background: rgba(46,124,246,.08); border: 1px solid rgba(46,124,246,.18); padding: 3px 11px; border-radius: 6px; letter-spacing: .3px; }
.case-status { font-size: 11.5px; color: var(--brand-2); display: flex; align-items: center; gap: 6px; font-weight: 600; }
.case-status i { width: 7px; height: 7px; border-radius: 50%; background: #2FBF9E; box-shadow: 0 0 0 3px rgba(47,191,158,.15); }
.case-card h3 { font-size: 16px; font-weight: 700; margin-bottom: 7px; }
.case-card p { font-size: 13.5px; color: var(--ink-2); flex: 1; }
.case-meta { margin-top: 15px; padding-top: 12px; border-top: 1px dashed var(--line); font-size: 12px; color: var(--ink-3); }
.case-meta span { display: inline-block; font-weight: 600; color: var(--ink-2); margin-right: 4px; }
.cases-note { text-align: center; font-size: 13px; color: var(--ink-3); margin-top: 28px; }

/* ---------- 流程 ---------- */
.process-list { max-width: 740px; margin: 0 auto; display: grid; gap: 0; position: relative; }
.process-list::before { content: ""; position: absolute; left: 27px; top: 24px; bottom: 24px; width: 2px; background: linear-gradient(180deg, rgba(46,124,246,.5), rgba(23,201,166,.2)); }
.process-item { display: flex; gap: 24px; padding: 20px 0; position: relative; }
.process-num {
  flex: 0 0 56px; width: 56px; height: 56px; border-radius: 50%;
  background: #fff; border: 2px solid var(--brand); color: var(--brand);
  display: flex; align-items: center; justify-content: center; font-weight: 800; font-size: 15px;
  box-shadow: 0 0 0 5px var(--bg), var(--shadow-sm); z-index: 1;
}
.process-item:nth-child(2) .process-num { border-color: var(--brand-2); color: var(--brand-2); }
.process-item:nth-child(3) .process-num { border-color: var(--gold); color: #D99A2B; }
.process-item:nth-child(4) .process-num { border-color: #8B5CF6; color: #8B5CF6; }
.process-item:nth-child(5) .process-num { border-color: #0FA08F; color: #0FA08F; }
.process-body { padding-top: 9px; }
.process-body h3 { font-size: 17px; font-weight: 700; margin-bottom: 4px; }
.process-body p { font-size: 14px; color: var(--ink-2); }

/* ---------- 报价 ---------- */
.pricing-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; align-items: stretch; }
.price-card {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius-lg);
  padding: 30px 24px; display: flex; flex-direction: column; position: relative; box-shadow: var(--shadow-sm);
  transition: transform .2s ease, box-shadow .2s ease;
}
.price-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-md); }
.price-card.featured { border-color: rgba(46,124,246,.55); box-shadow: 0 12px 38px rgba(46,124,246,.14); }
.featured-tag { position: absolute; top: -13px; left: 50%; transform: translateX(-50%); background: var(--grad); color: #fff; font-size: 12px; font-weight: 600; padding: 4px 16px; border-radius: 999px; white-space: nowrap; box-shadow: 0 6px 16px rgba(46,124,246,.35); }
.price-card h3 { font-size: 16px; font-weight: 700; margin-bottom: 10px; }
.price { font-size: 34px; font-weight: 800; letter-spacing: -1px; margin-bottom: 6px; }
.price .currency { font-size: 18px; font-weight: 700; vertical-align: 6px; color: var(--brand); }
.price .unit { font-size: 14px; font-weight: 500; color: var(--ink-3); margin-left: 3px; }
.price-desc { font-size: 13px; color: var(--ink-3); margin-bottom: 18px; min-height: 38px; }
.price-card ul { display: grid; gap: 8px; margin-bottom: 22px; flex: 1; }
.price-card ul li { font-size: 13.5px; color: var(--ink-2); padding-left: 22px; position: relative; }
.price-card ul li::before { content: ""; position: absolute; left: 0; top: 5px; width: 14px; height: 14px; border-radius: 50%; border: 1.6px solid var(--brand-2); }
.price-card ul li::after { content: ""; position: absolute; left: 3.5px; top: 9px; width: 6px; height: 3.5px; border-left: 1.6px solid var(--brand-2); border-bottom: 1.6px solid var(--brand-2); transform: rotate(-45deg); }
.pricing-note { text-align: center; margin-top: 30px; font-size: 14px; color: var(--ink-2); }

/* ---------- 为什么选我们 ---------- */
.why-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; }
.why-item { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 26px; box-shadow: var(--shadow-sm); transition: transform .2s ease, box-shadow .2s ease; }
.why-item:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); }
.why-item h3 { font-size: 16px; font-weight: 700; margin-bottom: 8px; display: flex; align-items: center; gap: 11px; }
.why-num { width: 27px; height: 27px; border-radius: 8px; background: var(--grad); color: #fff; font-size: 13px; display: inline-flex; align-items: center; justify-content: center; font-weight: 700; flex: 0 0 auto; }
.why-item p { font-size: 14px; color: var(--ink-2); }
.tech-strip { display: flex; flex-wrap: wrap; gap: 10px; justify-content: center; margin-top: 36px; }
.tech-strip span { font-size: 12.5px; color: var(--ink-2); background: #fff; border: 1px solid var(--line); padding: 6px 16px; border-radius: 999px; box-shadow: var(--shadow-sm); transition: all .15s ease; }
.tech-strip span:hover { color: var(--brand); border-color: rgba(46,124,246,.4); transform: translateY(-1px); }

/* ---------- FAQ ---------- */
.faq-list { display: grid; gap: 12px; }
.faq-item { background: #fff; border: 1px solid var(--line); border-radius: 13px; overflow: hidden; box-shadow: var(--shadow-sm); }
.faq-item summary {
  list-style: none; cursor: pointer; padding: 18px 22px; font-size: 15.5px; font-weight: 600;
  display: flex; align-items: center; justify-content: space-between; gap: 16px; user-select: none;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after { content: "+"; font-size: 22px; font-weight: 400; color: var(--brand); transition: transform .2s ease; flex: 0 0 auto; }
.faq-item[open] summary::after { transform: rotate(45deg); }
.faq-item p { padding: 0 22px 18px; font-size: 14px; color: var(--ink-2); }

/* ---------- 留资区 ---------- */
.contact-section { background: linear-gradient(180deg, var(--bg-dark) 0%, var(--bg-dark-2) 100%); color: #fff; position: relative; overflow: hidden; }
.contact-section::before { content: ""; position: absolute; top: -200px; right: -150px; width: 500px; height: 500px; border-radius: 50%; background: rgba(46,124,246,.18); filter: blur(110px); pointer-events: none; }
.contact-section::after { content: ""; position: absolute; bottom: -180px; left: -120px; width: 420px; height: 420px; border-radius: 50%; background: rgba(23,201,166,.14); filter: blur(110px); pointer-events: none; }
.contact-section .section-tag { background: rgba(111,177,255,.1); border-color: rgba(111,177,255,.28); color: #7FB5FF; }
.contact-section .section-tag::before { background: #7FB5FF; }
.contact-wrap { display: grid; grid-template-columns: 1fr 1.15fr; gap: 56px; align-items: start; position: relative; z-index: 2; }
.contact-info h2 { font-size: clamp(25px, 3vw, 34px); font-weight: 800; line-height: 1.3; margin: 16px 0 14px; letter-spacing: -.5px; }
.contact-info > p { color: rgba(255,255,255,.64); font-size: 15px; margin-bottom: 28px; max-width: 420px; }
.contact-list { display: grid; gap: 15px; }
.contact-list li { display: flex; align-items: center; gap: 12px; font-size: 15px; color: rgba(255,255,255,.86); }
.contact-list li span { font-weight: 600; color: #fff; }
.contact-list svg { width: 18px; height: 18px; stroke: #6FB1FF; fill: none; stroke-width: 1.9; flex: 0 0 auto; }
.lead-form {
  background: #fff; color: var(--ink); border-radius: var(--radius-lg);
  padding: 34px; box-shadow: 0 24px 70px rgba(0,0,0,.4); display: grid; gap: 16px;
}
.form-row { display: grid; gap: 6px; }
.form-row label { font-size: 13.5px; font-weight: 600; color: var(--ink); }
.form-row label i { color: #E5484D; font-style: normal; }
.form-row .opt { font-weight: 400; color: var(--ink-3); font-size: 12.5px; }
.form-row input, .form-row select, .form-row textarea {
  width: 100%; border: 1px solid var(--line); border-radius: 10px; padding: 11.5px 14px;
  font-size: 14.5px; font-family: inherit; color: var(--ink); background: #FAFBFD;
  transition: border-color .15s ease, box-shadow .15s ease; resize: vertical;
}
.form-row input:focus, .form-row select:focus, .form-row textarea:focus {
  outline: none; border-color: var(--brand); box-shadow: 0 0 0 3.5px rgba(46,124,246,.13); background: #fff;
}
.form-row input.invalid, .form-row textarea.invalid { border-color: #E5484D; box-shadow: 0 0 0 3px rgba(229,72,77,.12); }
.honeypot { position: absolute !important; left: -9999px !important; opacity: 0; height: 0; overflow: hidden; }
.form-note { font-size: 12px; color: var(--ink-3); text-align: center; }
.form-ok { display: none; text-align: center; padding: 30px 8px; }
.form-ok.show { display: block; }
.form-ok .ok-icon { width: 56px; height: 56px; border-radius: 50%; background: rgba(23,201,166,.12); margin: 0 auto 16px; display: flex; align-items: center; justify-content: center; }
.form-ok .ok-icon svg { width: 28px; height: 28px; stroke: #0FA08F; stroke-width: 2.4; fill: none; stroke-linecap: round; stroke-linejoin: round; }
.form-ok h3 { font-size: 19px; font-weight: 700; margin-bottom: 8px; }
.form-ok p { font-size: 14px; color: var(--ink-2); }

/* ---------- 页脚 ---------- */
.site-footer { background: var(--bg-dark); color: rgba(255,255,255,.7); padding-top: 64px; }
.footer-inner { display: flex; justify-content: space-between; gap: 44px; flex-wrap: wrap; padding-bottom: 44px; }
.footer-brand .brand-text { color: #fff; }
.footer-brand p { font-size: 13px; color: rgba(255,255,255,.48); margin-top: 14px; max-width: 300px; line-height: 1.8; }
.footer-links { display: flex; gap: 64px; flex-wrap: wrap; }
.footer-links h4 { font-size: 13px; font-weight: 600; color: #fff; margin-bottom: 15px; letter-spacing: .5px; }
.footer-links a { display: block; font-size: 13.5px; color: rgba(255,255,255,.6); margin-bottom: 10px; transition: color .15s ease; }
.footer-links a:hover { color: #fff; }
.footer-bottom { border-top: 1px solid var(--line-dark); padding: 18px 0; font-size: 12.5px; color: rgba(255,255,255,.38); }

/* ---------- 回到顶部 ---------- */
.to-top {
  position: fixed; right: 26px; bottom: 90px; z-index: 150;
  width: 42px; height: 42px; border-radius: 12px; background: var(--bg-card); color: #C9D6EC;
  border: 1px solid var(--line-dark); display: none; align-items: center; justify-content: center;
  box-shadow: 0 10px 30px rgba(0,0,0,.3); transition: all .2s ease;
}
.to-top.show { display: flex; }
.to-top:hover { background: var(--grad); color: #fff; transform: translateY(-2px); }
.to-top svg { width: 18px; height: 18px; stroke: currentColor; stroke-width: 2; fill: none; stroke-linecap: round; stroke-linejoin: round; }

/* ============================================================
   AI 客服浮窗
   ============================================================ */
.chat-launcher {
  position: fixed; right: 22px; bottom: 22px; z-index: 200;
  width: 58px; height: 58px; border-radius: 50%;
  background: var(--grad); color: #fff; box-shadow: 0 10px 28px rgba(46,124,246,.45);
  display: flex; align-items: center; justify-content: center; cursor: pointer;
  transition: transform .18s ease, box-shadow .18s ease;
}
.chat-launcher:hover { transform: scale(1.07); box-shadow: 0 14px 36px rgba(46,124,246,.55); }
.chat-launcher svg { width: 26px; height: 26px; stroke: #fff; stroke-width: 1.9; fill: none; stroke-linecap: round; stroke-linejoin: round; }
.chat-launcher-badge {
  position: absolute; top: -2px; right: -2px; min-width: 20px; height: 20px; padding: 0 5px;
  background: var(--gold); color: #14213C; font-size: 11.5px; font-weight: 800; border-radius: 999px;
  display: flex; align-items: center; justify-content: center; border: 2px solid #fff;
}
.chat-panel {
  position: fixed; right: 22px; bottom: 92px; z-index: 200;
  width: 370px; max-width: calc(100vw - 32px); height: 520px; max-height: calc(100vh - 124px);
  background: #fff; border-radius: 20px; box-shadow: 0 28px 80px rgba(7,13,26,.3);
  display: none; flex-direction: column; overflow: hidden; border: 1px solid var(--line);
}
.chat-panel.open { display: flex; animation: chatIn .24s ease; }
@keyframes chatIn { from { opacity: 0; transform: translateY(14px) scale(.98); } to { opacity: 1; transform: translateY(0) scale(1); } }
.chat-head { background: linear-gradient(120deg, var(--bg-dark-2), #12233F); color: #fff; padding: 15px 18px; display: flex; align-items: center; justify-content: space-between; }
.chat-head-info { display: flex; flex-direction: column; gap: 3px; }
.chat-head-name { font-size: 14.5px; font-weight: 700; display: flex; align-items: center; gap: 10px; }
.chat-avatar { width: 32px; height: 32px; border-radius: 10px; background: var(--grad); display: flex; align-items: center; justify-content: center; flex: 0 0 auto; }
.chat-avatar svg { width: 17px; height: 17px; stroke: #fff; stroke-width: 1.9; fill: none; }
.chat-head-status { font-size: 11.5px; color: rgba(255,255,255,.58); display: flex; align-items: center; gap: 6px; padding-left: 42px; }
.chat-head-status i { width: 7px; height: 7px; border-radius: 50%; background: #3BD6A6; }
.chat-close { background: none; border: 0; color: rgba(255,255,255,.7); font-size: 22px; line-height: 1; padding: 4px 8px; border-radius: 8px; }
.chat-close:hover { background: rgba(255,255,255,.1); color: #fff; }
.chat-body { flex: 1; overflow-y: auto; padding: 16px; display: flex; flex-direction: column; gap: 10px; background: #F4F7FC; }
.chat-body::-webkit-scrollbar { width: 5px; }
.chat-body::-webkit-scrollbar-thumb { background: #D3DCEA; border-radius: 4px; }
.msg { max-width: 84%; padding: 10px 14px; border-radius: 14px; font-size: 13.5px; line-height: 1.6; white-space: pre-wrap; word-break: break-word; }
.msg-bot { background: #fff; border: 1px solid var(--line); border-top-left-radius: 4px; align-self: flex-start; box-shadow: var(--shadow-sm); }
.msg-user { background: var(--grad); color: #fff; border-top-right-radius: 4px; align-self: flex-end; }
.msg b { color: var(--brand); }
.msg a { color: var(--brand); font-weight: 600; text-decoration: underline; }
.chat-quick { padding: 10px 14px; display: flex; gap: 8px; flex-wrap: wrap; border-top: 1px solid var(--line); background: #fff; }
.chip { font-size: 12.5px; color: var(--brand); background: rgba(46,124,246,.07); border: 1px solid rgba(46,124,246,.22); padding: 6px 13px; border-radius: 999px; cursor: pointer; transition: background .15s ease; }
.chip:hover { background: rgba(46,124,246,.14); }
.chat-input-row { display: flex; gap: 8px; padding: 12px 14px; border-top: 1px solid var(--line); background: #fff; }
.chat-input-row input { flex: 1; border: 1px solid var(--line); border-radius: 999px; padding: 10px 16px; font-size: 13.5px; font-family: inherit; outline: none; background: #FAFBFD; }
.chat-input-row input:focus { border-color: var(--brand); background: #fff; }
.chat-send { width: 40px; height: 40px; border-radius: 50%; background: var(--grad); color: #fff; border: 0; flex: 0 0 auto; display: flex; align-items: center; justify-content: center; transition: transform .15s ease; }
.chat-send:hover { transform: scale(1.06); }
.chat-send svg { width: 17px; height: 17px; stroke: #fff; stroke-width: 2; fill: none; stroke-linecap: round; stroke-linejoin: round; }
.typing { display: inline-flex; gap: 4px; padding: 6px 2px; }
.typing i { width: 6px; height: 6px; border-radius: 50%; background: #B9C4D6; animation: tB 1.2s infinite; }
.typing i:nth-child(2) { animation-delay: .2s; }
.typing i:nth-child(3) { animation-delay: .4s; }
@keyframes tB { 0%,80%,100% { opacity: .3; transform: translateY(0); } 40% { opacity: 1; transform: translateY(-2px); } }

/* ---------- 在线联系：转人工 · 企业微信 ---------- */
.chat-to-human {
  display: flex; align-items: center; justify-content: center; gap: 7px;
  padding: 10px 14px; background: linear-gradient(120deg, #07C160, #06AD56); color: #fff;
  font-size: 13px; font-weight: 600; cursor: pointer; border-top: 1px solid rgba(255,255,255,.18);
  transition: filter .15s ease;
}
.chat-to-human:hover { filter: brightness(1.07); }
.chat-to-human svg { width: 15px; height: 15px; stroke: #fff; stroke-width: 1.8; fill: none; stroke-linecap: round; stroke-linejoin: round; }
.chat-kf-btn {
  display: inline-block; margin: 8px 0 2px; padding: 10px 16px;
  background: linear-gradient(135deg, #07C160, #06AD56); color: #fff !important;
  border-radius: 9px; text-decoration: none !important; font-size: 13px; font-weight: 700;
  box-shadow: 0 4px 12px rgba(7,193,96,.3);
}
.chat-copy-btn {
  display: block; margin: 7px 0 2px; padding: 9px 14px; width: 100%;
  background: rgba(46,124,246,.08); color: var(--brand); border: 1px dashed rgba(46,124,246,.4);
  border-radius: 9px; font-size: 12.5px; font-weight: 600; cursor: pointer; font-family: inherit;
  transition: background .15s ease;
}
.chat-copy-btn:hover { background: rgba(46,124,246,.16); }
.chat-kf-note { display: block; margin-top: 6px; font-size: 11px; color: #8892A6; }
.msg-bot .chat-kf-btn, .msg-bot .chat-copy-btn { white-space: normal; }

/* ---------- 在线联系：顶部优惠条 ---------- */
.promo-bar {
  position: fixed; top: 0; left: 0; right: 0; z-index: 210;
  background: linear-gradient(120deg, #0B3B8C, #0E4FB8); color: #fff;
  display: flex; align-items: center; justify-content: center; gap: 12px;
  padding: 9px 44px; font-size: 13.5px; text-align: center;
}
.promo-text b { color: var(--gold); }
.promo-close {
  position: absolute; right: 10px; top: 50%; transform: translateY(-50%);
  background: none; border: 0; color: rgba(255,255,255,.75); font-size: 20px; line-height: 1;
  padding: 2px 8px; border-radius: 6px; cursor: pointer;
}
.promo-close:hover { color: #fff; background: rgba(255,255,255,.12); }
.has-promo .site-header { top: 40px; }
.has-promo .promo-bar ~ .site-header { top: 40px; }

/* ---------- 在线联系：退出挽留弹窗 ---------- */
.exit-modal {
  position: fixed; inset: 0; z-index: 300; background: rgba(7,13,26,.62);
  backdrop-filter: blur(4px); display: flex; align-items: center; justify-content: center;
  opacity: 0; transition: opacity .22s ease; padding: 20px;
}
.exit-modal.show { opacity: 1; }
.exit-box {
  position: relative; width: 100%; max-width: 400px; background: #fff;
  border-radius: 22px; padding: 34px 30px 26px; text-align: center;
  box-shadow: 0 30px 80px rgba(7,13,26,.4); transform: translateY(14px) scale(.97);
  transition: transform .22s ease; border: 1px solid var(--line);
}
.exit-modal.show .exit-box { transform: none; }
.exit-close { position: absolute; top: 12px; right: 14px; background: none; border: 0; font-size: 22px; color: #9AA6BC; cursor: pointer; padding: 4px 8px; border-radius: 8px; }
.exit-close:hover { background: #F1F4FA; }
.exit-icon { font-size: 40px; line-height: 1; margin-bottom: 10px; }
.exit-box h3 { font-size: 19px; font-weight: 800; color: var(--ink); margin-bottom: 8px; }
.exit-box p { font-size: 13.5px; color: var(--ink-3); line-height: 1.7; margin-bottom: 16px; }
.exit-box p b { color: var(--brand); }
.exit-coupon {
  display: flex; align-items: center; justify-content: space-between;
  background: linear-gradient(120deg, rgba(46,124,246,.08), rgba(255,196,87,.12));
  border: 1px dashed rgba(46,124,246,.45); border-radius: 12px;
  padding: 11px 16px; margin-bottom: 16px; font-size: 13px;
}
.exit-coupon span { font-weight: 700; color: var(--ink); }
.exit-coupon b { color: #D97706; font-size: 12px; background: rgba(255,196,87,.25); padding: 3px 9px; border-radius: 999px; }
.exit-cta {
  width: 100%; padding: 13px; background: var(--grad); color: #fff; border: 0;
  border-radius: 12px; font-size: 15px; font-weight: 700; cursor: pointer;
  box-shadow: 0 8px 22px rgba(46,124,246,.35); font-family: inherit;
}
.exit-cta:hover { filter: brightness(1.06); }
.exit-stay { margin-top: 12px; background: none; border: 0; color: #9AA6BC; font-size: 12.5px; cursor: pointer; font-family: inherit; }
.exit-stay:hover { color: var(--ink-2); }

/* ---------- 在线联系：复制提示 ---------- */
.copy-toast {
  position: fixed; left: 50%; bottom: 96px; transform: translateX(-50%); z-index: 400;
  background: #14213C; color: #fff; font-size: 13px; padding: 10px 20px; border-radius: 10px;
  box-shadow: 0 10px 30px rgba(7,13,26,.35); animation: toastIn .2s ease; white-space: nowrap;
}
@keyframes toastIn { from { opacity: 0; transform: translate(-50%, 8px); } to { opacity: 1; transform: translate(-50%, 0); } }

/* ---------- 在线联系：表单成功区按钮 ---------- */
.form-ok .ok-kf {
  display: block; margin: 10px auto 0; width: fit-content; padding: 11px 22px;
  background: linear-gradient(135deg, #07C160, #06AD56); color: #fff !important;
  border-radius: 10px; text-decoration: none !important; font-size: 14px; font-weight: 700;
  box-shadow: 0 5px 16px rgba(7,193,96,.3);
}
.form-ok .ok-copy {
  display: block; margin: 10px auto 0; padding: 10px 18px;
  background: rgba(46,124,246,.08); color: var(--brand); border: 1px dashed rgba(46,124,246,.4);
  border-radius: 10px; font-size: 13px; font-weight: 600; cursor: pointer; font-family: inherit;
}
.form-ok .ok-copy:hover { background: rgba(46,124,246,.16); }

/* ---------- 滚动显现 ---------- */
.rv { opacity: 0; transform: translateY(22px); transition: opacity .55s ease, transform .55s ease; }
.rv.in { opacity: 1; transform: none; }

/* ---------- 响应式 ---------- */
@media (max-width: 1080px) {
  .cards-grid { grid-template-columns: repeat(3, 1fr); }
  .pricing-grid { grid-template-columns: repeat(2, 1fr); }
  .hero-inner { grid-template-columns: 1fr; gap: 70px; }
  .hero-right { max-width: 560px; margin: 0 auto; width: 100%; }
  .mock-tag { top: -26px; }
}
@media (max-width: 900px) {
  .cards-grid { grid-template-columns: repeat(2, 1fr); }
  .contact-wrap { grid-template-columns: 1fr; gap: 40px; }
}
@media (max-width: 720px) {
  .promo-bar { padding: 8px 34px; font-size: 12px; line-height: 1.5; }
  .has-promo .site-header { top: 38px; }
  .section { padding: 68px 0; }
  .site-nav {
    position: fixed; top: 70px; left: 0; right: 0; background: #fff; flex-direction: column; align-items: flex-start;
    padding: 18px 5%; gap: 2px; box-shadow: var(--shadow-md); display: none; border-bottom: 1px solid var(--line);
  }
  .site-nav.open { display: flex; }
  .site-nav a { color: var(--ink-2) !important; padding: 12px 0; width: 100%; font-size: 15.5px; }
  .site-nav .nav-cta { text-align: center; margin-top: 8px; }
  .nav-toggle { display: flex; }
  .brand-sub { display: none; }
  .hero { padding: 130px 0 76px; }
  .hero-inner { gap: 56px; }
  .mock-card.mc1 { top: -20px; right: -6px; }
  .mock-card.mc2 { left: -8px; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 26px 12px; padding: 36px 0; }
  .cards-grid, .cases-grid, .why-grid { grid-template-columns: 1fr; }
  .pricing-grid { grid-template-columns: 1fr; }
  .case-filter { gap: 8px; }
  .cf-btn { padding: 7px 15px; font-size: 13px; }
  .footer-inner { flex-direction: column; gap: 30px; }
  .footer-links { gap: 36px; }
  .chat-panel { right: 16px; bottom: 84px; height: 500px; }
  .chat-launcher { right: 16px; bottom: 16px; }
  .to-top { right: 16px; bottom: 84px; }
  .hide-mobile { display: none; }
}
@media (max-width: 480px) {
  .lead-form { padding: 26px 20px; }
}