/* =========================================================
   灵客数智 VeeLink 官网 · 设计系统
   浅色科技风（对标阿里通义/百度云/火山方舟）：
   白底 / 淡彩渐变光晕 / 深蓝紫青主色 / 轻投影卡片
   ========================================================= */

:root {
  --bg-0: #ffffff;
  --bg-1: #f8faff;
  --bg-2: #f2f5fc;
  --bg-card: #ffffff;
  --bg-card-hover: #ffffff;
  --border: #e6eaf3;
  --border-strong: #d5dcea;
  --text-0: #111c35;
  --text-1: #4c5871;
  --text-2: #8a94a8;
  --blue: #2563eb;
  --purple: #7c3aed;
  --cyan: #06b6d4;
  --grad: linear-gradient(100deg, #2563eb 0%, #7c3aed 50%, #06b6d4 100%);
  --grad-soft: linear-gradient(135deg, rgba(37, 99, 235, 0.10), rgba(124, 58, 237, 0.10), rgba(6, 182, 212, 0.10));
  --shadow-sm: 0 1px 2px rgba(16, 34, 74, 0.05), 0 2px 8px rgba(16, 34, 74, 0.04);
  --shadow-lg: 0 16px 40px rgba(16, 34, 74, 0.12), 0 4px 12px rgba(16, 34, 74, 0.06);
  --radius: 16px;
  --radius-lg: 24px;
  --nav-h: 68px;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "HarmonyOS Sans SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  --mono: "SF Mono", "Cascadia Code", Consolas, "Courier New", monospace;
}

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

html { scroll-behavior: smooth; scroll-padding-top: calc(var(--nav-h) + 16px); }

body {
  font-family: var(--font);
  background: var(--bg-0);
  color: var(--text-1);
  font-size: 16px;
  line-height: 1.7;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

::selection { background: rgba(124, 58, 237, 0.18); color: var(--text-0); }

img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }
button { font-family: inherit; cursor: pointer; }

.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }

h1, h2, h3, h4 { color: var(--text-0); font-weight: 700; line-height: 1.25; }

.grad-text {
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
}

/* ---------- 导航 ---------- */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  height: var(--nav-h);
  transition: background 0.3s, border-color 0.3s, box-shadow 0.3s;
  border-bottom: 1px solid transparent;
}
.nav.scrolled {
  background: rgba(255, 255, 255, 0.86);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border-bottom-color: var(--border);
  box-shadow: 0 4px 20px rgba(16, 34, 74, 0.06);
}
.nav-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  height: 100%;
  display: flex;
  align-items: center;
  gap: 32px;
}
.nav-logo { display: flex; align-items: center; gap: 10px; flex-shrink: 0; }
.logo-text { display: flex; flex-direction: column; line-height: 1.15; }
.nav-logo .logo-mark { width: 32px; height: 32px; }
.nav-logo .logo-cn { font-size: 17px; font-weight: 700; color: var(--text-0); letter-spacing: 1px; }
.nav-logo .logo-en { font-size: 12px; color: var(--text-2); letter-spacing: 2px; text-transform: uppercase; margin-top: 1px; }

.nav-links { display: flex; align-items: center; gap: 4px; margin-left: auto; }
.nav-links a {
  padding: 8px 14px;
  font-size: 14.5px;
  color: var(--text-1);
  border-radius: 8px;
  transition: color 0.2s, background 0.2s;
  white-space: nowrap;
}
.nav-links a:hover { color: var(--blue); background: rgba(37, 99, 235, 0.06); }
.nav-links a.active { color: var(--text-0); font-weight: 600; }
.nav-links a.active::after {
  content: "";
  display: block;
  height: 2px;
  margin: 2px 14px 0;
  border-radius: 2px;
  background: var(--grad);
}

.nav-actions { display: flex; align-items: center; gap: 12px; flex-shrink: 0; }
.lang-btn {
  background: rgba(255, 255, 255, 0.7);
  border: 1px solid var(--border-strong);
  color: var(--text-1);
  font-size: 13px;
  padding: 6px 14px;
  border-radius: 999px;
  transition: all 0.2s;
  letter-spacing: 0.5px;
}
.lang-btn:hover { color: var(--purple); border-color: var(--purple); }

.hamburger {
  display: none;
  background: none;
  border: none;
  width: 40px; height: 40px;
  position: relative;
}
.hamburger span {
  position: absolute;
  left: 9px; right: 9px;
  height: 2px;
  background: var(--text-0);
  border-radius: 2px;
  transition: all 0.3s;
}
.hamburger span:nth-child(1) { top: 13px; }
.hamburger span:nth-child(2) { top: 19px; }
.hamburger span:nth-child(3) { top: 25px; }
.hamburger.open span:nth-child(1) { top: 19px; transform: rotate(45deg); }
.hamburger.open span:nth-child(2) { opacity: 0; }
.hamburger.open span:nth-child(3) { top: 19px; transform: rotate(-45deg); }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 600;
  transition: all 0.25s;
  border: none;
  white-space: nowrap;
}
.btn-primary {
  background: var(--grad);
  color: #fff;
  box-shadow: 0 6px 20px rgba(59, 99, 235, 0.28);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 28px rgba(59, 99, 235, 0.4);
}
.btn-ghost {
  background: rgba(255, 255, 255, 0.8);
  color: var(--text-0);
  border: 1px solid var(--border-strong);
  backdrop-filter: blur(8px);
}
.btn-ghost:hover { border-color: var(--purple); color: var(--purple); background: rgba(124, 58, 237, 0.05); transform: translateY(-2px); }
.btn-sm { padding: 8px 20px; font-size: 14px; }
.btn .arrow { transition: transform 0.25s; }
.btn:hover .arrow { transform: translateX(4px); }

/* ---------- Hero（首页） ---------- */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  overflow: hidden;
  padding: calc(var(--nav-h) + 40px) 0 80px;
  background:
    radial-gradient(900px 480px at 18% 8%, rgba(37, 99, 235, 0.10), transparent 65%),
    radial-gradient(800px 460px at 85% 18%, rgba(124, 58, 237, 0.09), transparent 65%),
    radial-gradient(700px 420px at 55% 95%, rgba(6, 182, 212, 0.07), transparent 65%),
    var(--bg-0);
}
#particles {
  position: absolute;
  inset: 0;
  z-index: 0;
}
.hero-content { position: relative; z-index: 2; text-align: center; max-width: 880px; margin: 0 auto; }
.hero h1 {
  font-size: clamp(38px, 6vw, 64px);
  letter-spacing: 1px;
  margin: 24px 0 20px;
}
.hero .hero-sub {
  font-size: clamp(16px, 2vw, 19px);
  color: var(--text-1);
  max-width: 640px;
  margin: 0 auto 40px;
}
.hero-ctas { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }

.badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 18px;
  border-radius: 999px;
  border: 1px solid rgba(124, 58, 237, 0.25);
  background: rgba(124, 58, 237, 0.06);
  font-size: 13.5px;
  color: #6d28d9;
  letter-spacing: 1px;
}
.badge::before {
  content: "";
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 10px rgba(6, 182, 212, 0.7);
  animation: pulse 2s infinite;
}
@keyframes pulse { 50% { opacity: 0.4; } }

.scroll-hint {
  position: absolute;
  bottom: 28px; left: 50%;
  transform: translateX(-50%);
  z-index: 2;
  width: 24px; height: 40px;
  border: 2px solid var(--border-strong);
  border-radius: 14px;
}
.scroll-hint::before {
  content: "";
  position: absolute;
  top: 7px; left: 50%;
  width: 4px; height: 8px;
  margin-left: -2px;
  border-radius: 4px;
  background: var(--cyan);
  animation: scrollDot 1.8s infinite;
}
@keyframes scrollDot {
  0% { transform: translateY(0); opacity: 1; }
  70% { transform: translateY(14px); opacity: 0; }
  100% { opacity: 0; }
}

/* ---------- 光晕 & 网格背景 ---------- */
.glow-blob {
  position: absolute;
  border-radius: 50%;
  filter: blur(90px);
  opacity: 0.7;
  pointer-events: none;
  z-index: 0;
}
.blob-blue { background: rgba(96, 165, 250, 0.22); }
.blob-purple { background: rgba(167, 139, 250, 0.22); }
.blob-cyan { background: rgba(103, 232, 249, 0.20); }
.blob-drift { animation: drift 14s ease-in-out infinite alternate; }
@keyframes drift {
  from { transform: translate(0, 0) scale(1); }
  to { transform: translate(60px, -40px) scale(1.15); }
}

.grid-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  background-image:
    linear-gradient(rgba(37, 99, 235, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(37, 99, 235, 0.05) 1px, transparent 1px);
  background-size: 56px 56px;
  -webkit-mask-image: radial-gradient(ellipse 80% 60% at 50% 40%, #000 30%, transparent 75%);
  mask-image: radial-gradient(ellipse 80% 60% at 50% 40%, #000 30%, transparent 75%);
}

/* ---------- 子页 Hero ---------- */
.page-hero {
  position: relative;
  padding: calc(var(--nav-h) + 96px) 0 88px;
  overflow: hidden;
  text-align: center;
  background:
    radial-gradient(820px 420px at 20% 0%, rgba(37, 99, 235, 0.09), transparent 65%),
    radial-gradient(760px 400px at 82% 10%, rgba(124, 58, 237, 0.08), transparent 65%),
    var(--bg-0);
}
.page-hero h1 { font-size: clamp(32px, 5vw, 52px); margin: 20px 0 18px; letter-spacing: 1px; }
.page-hero .hero-sub { max-width: 680px; margin: 0 auto; font-size: 17px; }

/* ---------- 通用 Section ---------- */
.section { position: relative; padding: 96px 0; }
.section-alt { background: linear-gradient(180deg, transparent, var(--bg-1) 18%, var(--bg-1) 82%, transparent); }
.section-head { text-align: center; max-width: 720px; margin: 0 auto 56px; }
.section-head h2 { font-size: clamp(28px, 4vw, 40px); margin: 14px 0 16px; }
.section-head .lead { font-size: 16.5px; color: var(--text-1); }
.eyebrow {
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 4px;
  text-transform: uppercase;
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* ---------- 网格布局 ---------- */
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }

/* ---------- 卡片 ---------- */
.card {
  position: relative;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px 28px;
  box-shadow: var(--shadow-sm);
  transition: transform 0.3s, border-color 0.3s, background 0.3s, box-shadow 0.3s;
  overflow: hidden;
}
.card:hover {
  transform: translateY(-6px);
  border-color: rgba(124, 58, 237, 0.35);
  background: var(--bg-card-hover);
  box-shadow: var(--shadow-lg);
}
.card h3 { font-size: 20px; margin: 18px 0 10px; }
.card p { font-size: 14.5px; color: var(--text-1); }

/* 鼠标跟随光效卡 */
.glow-card::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(480px circle at var(--mx, 50%) var(--my, 50%), rgba(124, 58, 237, 0.07), transparent 55%);
  opacity: 0;
  transition: opacity 0.3s;
  pointer-events: none;
}
.glow-card:hover::before { opacity: 1; }

/* 顶部渐变描边卡 */
.card-topline::after {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: var(--grad);
  opacity: 0;
  transition: opacity 0.3s;
}
.card-topline:hover::after { opacity: 1; }

.icon-box {
  width: 52px; height: 52px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--grad-soft);
  border: 1px solid rgba(124, 58, 237, 0.18);
}
.icon-box svg { width: 26px; height: 26px; stroke: url(#iconGrad); }

.card-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: 18px;
  font-size: 14px;
  font-weight: 600;
  color: var(--blue);
  transition: gap 0.25s;
}
.card:hover .card-link { gap: 12px; }

/* ---------- 业务矩阵大卡（首页） ---------- */
.biz-card { padding: 40px 36px; min-height: 260px; display: flex; flex-direction: column; }
.biz-card h3 { font-size: 23px; }
.biz-card .biz-tag {
  font-size: 12px;
  letter-spacing: 2px;
  color: var(--text-2);
  text-transform: uppercase;
  margin-top: 4px;
}
.biz-card p { margin-top: auto; padding-top: 14px; }

/* ---------- 数字指标 ---------- */
.stats-strip {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  padding: 44px 40px;
  border-radius: var(--radius-lg);
  border: 1px solid #e0e7ff;
  background: linear-gradient(135deg, rgba(37, 99, 235, 0.06), rgba(124, 58, 237, 0.05), rgba(6, 182, 212, 0.05));
  box-shadow: var(--shadow-sm);
}
.stat { text-align: center; }
.stat .num {
  font-size: clamp(34px, 4vw, 48px);
  font-weight: 800;
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  line-height: 1.1;
}
.stat .label { font-size: 14px; color: var(--text-1); margin-top: 8px; }

/* ---------- 左右分栏特性 ---------- */
.feature-split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}
.feature-split + .feature-split { margin-top: 96px; }
.feature-split.reverse .feature-media { order: 2; }
.feature-copy .eyebrow { letter-spacing: 3px; }
.feature-copy h3 { font-size: clamp(24px, 3vw, 32px); margin: 12px 0 16px; }
.feature-copy > p { margin-bottom: 20px; }

.check-list li {
  position: relative;
  padding: 7px 0 7px 34px;
  font-size: 15px;
  color: var(--text-1);
}
.check-list li::before {
  content: "";
  position: absolute;
  left: 0; top: 11px;
  width: 20px; height: 20px;
  border-radius: 50%;
  background: var(--grad-soft);
  border: 1px solid rgba(6, 182, 212, 0.45);
}
.check-list li::after {
  content: "";
  position: absolute;
  left: 6px; top: 16px;
  width: 8px; height: 5px;
  border-left: 2px solid #0891b2;
  border-bottom: 2px solid #0891b2;
  transform: rotate(-45deg);
}
.check-list li strong { color: var(--text-0); font-weight: 600; }

.feature-media {
  position: relative;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  background: linear-gradient(145deg, #f8faff, #eef2fb);
  padding: 36px;
  min-height: 320px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}
.feature-media::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(37, 99, 235, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(37, 99, 235, 0.05) 1px, transparent 1px);
  background-size: 32px 32px;
}
.feature-media svg { position: relative; z-index: 1; width: 100%; height: auto; max-height: 300px; }

/* ---------- 步骤流程 ---------- */
.steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; counter-reset: step; }
.step-item {
  position: relative;
  padding: 28px 24px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--bg-card);
  box-shadow: var(--shadow-sm);
  counter-increment: step;
}
.step-item::before {
  content: "0" counter(step);
  font-size: 30px;
  font-weight: 800;
  font-family: var(--mono);
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  opacity: 0.9;
}
.step-item h4 { font-size: 17px; margin: 12px 0 8px; }
.step-item p { font-size: 13.5px; color: var(--text-1); }

/* ---------- CTA 横幅 ---------- */
.cta-band { padding: 40px 0 110px; }
.cta-box {
  position: relative;
  text-align: center;
  padding: 72px 40px;
  border-radius: var(--radius-lg);
  border: 1px solid #ddd6fe;
  background:
    radial-gradient(600px 200px at 50% 0%, rgba(124, 58, 237, 0.10), transparent),
    linear-gradient(145deg, rgba(37, 99, 235, 0.05), rgba(6, 182, 212, 0.04));
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}
.cta-box h2 { font-size: clamp(26px, 4vw, 38px); margin-bottom: 14px; }
.cta-box p { max-width: 560px; margin: 0 auto 32px; }

/* ---------- 代码卡（API 页，保留深色终端风） ---------- */
.code-card {
  border-radius: var(--radius);
  border: 1px solid #1e2740;
  background: #0d1326;
  overflow: hidden;
  box-shadow: 0 24px 56px rgba(16, 34, 74, 0.28);
  text-align: left;
}
.code-head {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px 18px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  background: rgba(255, 255, 255, 0.04);
}
.code-head .dot { width: 11px; height: 11px; border-radius: 50%; }
.code-head .dot:nth-child(1) { background: #ff5f57; }
.code-head .dot:nth-child(2) { background: #febc2e; }
.code-head .dot:nth-child(3) { background: #28c840; }
.code-head .code-title { margin-left: 10px; font-size: 12.5px; color: #7c88a3; font-family: var(--mono); }
.code-card pre {
  padding: 22px 24px;
  font-family: var(--mono);
  font-size: 13.5px;
  line-height: 1.8;
  color: #c9d4e8;
  overflow-x: auto;
}
.code-card .c-key { color: #a78bfa; }
.code-card .c-str { color: #34d399; }
.code-card .c-cmt { color: #5b6a85; }
.code-card .c-cyan { color: #22d3ee; }

/* ---------- 模型/标签芯片 ---------- */
.chip-wall { display: flex; flex-wrap: wrap; gap: 12px; justify-content: center; }
.chip {
  padding: 9px 22px;
  border-radius: 999px;
  border: 1px solid var(--border-strong);
  background: #ffffff;
  font-size: 14px;
  color: var(--text-1);
  box-shadow: var(--shadow-sm);
  transition: all 0.25s;
}
.chip:hover { border-color: var(--blue); color: var(--blue); transform: translateY(-2px); }

/* ---------- 加速卡矩阵（算力设备页） ---------- */
.gpu-group-title {
  display: flex;
  align-items: center;
  gap: 14px;
  margin: 44px 0 20px;
  font-size: 19px;
}
.gpu-group-title::after { content: ""; flex: 1; height: 1px; background: var(--border); }
.gpu-card { padding: 24px 22px; }
.gpu-card h3 { margin: 0 0 8px; font-size: 18.5px; }
.gpu-tag {
  display: inline-block;
  font-size: 12px;
  line-height: 1.5;
  padding: 3px 10px;
  border-radius: 999px;
  background: rgba(37, 99, 235, 0.07);
  border: 1px solid rgba(37, 99, 235, 0.2);
  color: var(--blue);
  margin-bottom: 12px;
}
.gpu-tag.cn {
  background: rgba(6, 182, 212, 0.07);
  border-color: rgba(6, 182, 212, 0.25);
  color: #0e7490;
}
.gpu-card .gpu-spec {
  font-family: var(--mono);
  font-size: 12.5px;
  color: var(--purple);
  margin-bottom: 10px;
  letter-spacing: 0.2px;
}
.gpu-card p:not(.gpu-spec) { font-size: 13.5px; }
.gpu-note { text-align: center; margin-top: 36px; font-size: 13px; color: var(--text-2); }

/* ---------- 表格（算力设备规格） ---------- */
.spec-table-wrap { overflow-x: auto; border-radius: var(--radius); border: 1px solid var(--border); background: #fff; box-shadow: var(--shadow-sm); }
.spec-table { width: 100%; border-collapse: collapse; font-size: 14.5px; min-width: 720px; }
.spec-table th, .spec-table td { padding: 16px 20px; text-align: left; border-bottom: 1px solid var(--border); }
.spec-table th {
  background: var(--bg-1);
  color: var(--text-0);
  font-weight: 600;
  font-size: 13.5px;
  letter-spacing: 1px;
  white-space: nowrap;
}
.spec-table td { color: var(--text-1); }
.spec-table td:first-child { color: var(--text-0); font-weight: 600; }
.spec-table tr:last-child td { border-bottom: none; }
.spec-table tbody tr { transition: background 0.2s; }
.spec-table tbody tr:hover { background: #f5f8ff; }

/* ---------- 关于页 ---------- */
.about-intro { max-width: 800px; margin: 0 auto; text-align: center; font-size: 17px; }
.about-intro p + p { margin-top: 18px; }
.contact-card { text-align: center; padding: 40px 28px; }
.contact-card .icon-box { margin: 0 auto; }
.contact-card .contact-val { font-size: 17px; color: var(--text-0); font-weight: 600; margin-top: 6px; word-break: break-all; }

/* ---------- Footer ---------- */
.footer {
  border-top: 1px solid var(--border);
  background: var(--bg-1);
  padding: 64px 0 28px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.4fr;
  gap: 40px;
  padding-bottom: 44px;
}
.footer-brand .nav-logo { margin-bottom: 16px; }
.footer-brand p { font-size: 14px; color: var(--text-2); max-width: 300px; }
.footer h4 { font-size: 15px; margin-bottom: 18px; letter-spacing: 1px; }
.footer-col li { margin-bottom: 11px; }
.footer-col a { font-size: 14px; color: var(--text-2); transition: color 0.2s; }
.footer-col a:hover { color: var(--blue); }
.footer-col .foot-text { font-size: 14px; color: var(--text-2); }
.footer-bottom {
  border-top: 1px solid var(--border);
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  font-size: 13px;
  color: var(--text-2);
}
.footer-bottom a { color: var(--text-2); }
.footer-bottom a:hover { color: var(--blue); }

/* ---------- 智能体客服悬浮组件 ---------- */
.vl-chat-fab {
  position: fixed;
  right: 24px; bottom: 24px;
  z-index: 120;
  width: 56px; height: 56px;
  border-radius: 50%;
  border: none;
  background: var(--grad);
  box-shadow: 0 8px 24px rgba(59, 99, 235, 0.35);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform 0.25s, box-shadow 0.25s;
}
.vl-chat-fab:hover { transform: scale(1.08); box-shadow: 0 12px 32px rgba(59, 99, 235, 0.45); }
.vl-chat-fab svg { width: 28px; height: 28px; stroke: #fff; }
.vl-chat-fab .vl-fab-dot {
  position: absolute;
  top: 4px; right: 4px;
  width: 10px; height: 10px;
  border-radius: 50%;
  background: #22c55e;
  border: 2px solid #fff;
}
.vl-chat-panel {
  position: fixed;
  right: 24px; bottom: 92px;
  z-index: 120;
  width: 372px;
  height: min(560px, calc(100vh - 130px));
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 18px;
  box-shadow: 0 24px 64px rgba(16, 34, 74, 0.22);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  transform: translateY(16px) scale(0.96);
  transform-origin: bottom right;
  opacity: 0;
  visibility: hidden;
  transition: all 0.28s cubic-bezier(0.22, 1, 0.36, 1);
}
.vl-chat-panel.open { transform: none; opacity: 1; visibility: visible; }
.vl-chat-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 16px;
  background: var(--grad);
  color: #fff;
  flex-shrink: 0;
}
.vl-chat-title { display: flex; align-items: center; gap: 10px; }
.vl-chat-avatar {
  width: 34px; height: 34px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.2);
  display: flex; align-items: center; justify-content: center;
}
.vl-chat-avatar svg { width: 20px; height: 20px; stroke: #fff; }
.vl-chat-title .t { font-size: 15px; font-weight: 700; line-height: 1.3; }
.vl-chat-title .s { font-size: 11.5px; opacity: 0.85; }
.vl-chat-close {
  background: none; border: none;
  color: #fff; font-size: 22px; line-height: 1;
  opacity: 0.85; padding: 4px;
}
.vl-chat-close:hover { opacity: 1; }
.vl-chat-body {
  flex: 1;
  overflow-y: auto;
  padding: 16px 14px;
  background: var(--bg-1);
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.vl-msg { max-width: 84%; padding: 10px 14px; border-radius: 14px; font-size: 14px; line-height: 1.6; white-space: pre-wrap; word-break: break-word; }
.vl-msg.bot { align-self: flex-start; background: #fff; border: 1px solid var(--border); color: var(--text-1); border-bottom-left-radius: 4px; }
.vl-msg.user { align-self: flex-end; background: var(--grad); color: #fff; border-bottom-right-radius: 4px; }
.vl-msg.bot a { color: var(--blue); text-decoration: underline; }
.vl-typing { display: inline-flex; gap: 5px; padding: 4px 0; }
.vl-typing i {
  width: 7px; height: 7px; border-radius: 50%;
  background: var(--text-2);
  animation: vlBlink 1.2s infinite;
}
.vl-typing i:nth-child(2) { animation-delay: 0.2s; }
.vl-typing i:nth-child(3) { animation-delay: 0.4s; }
@keyframes vlBlink { 0%, 80%, 100% { opacity: 0.25; } 40% { opacity: 1; } }
.vl-chat-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding: 10px 14px;
  border-top: 1px solid var(--border);
  background: #fff;
  flex-shrink: 0;
}
.vl-chip {
  font-size: 12.5px;
  padding: 5px 12px;
  border-radius: 999px;
  border: 1px solid var(--border-strong);
  background: #fff;
  color: var(--text-1);
  cursor: pointer;
  transition: all 0.2s;
}
.vl-chip:hover { border-color: var(--blue); color: var(--blue); }
.vl-chat-inputbar {
  display: flex;
  gap: 10px;
  padding: 12px 14px;
  background: #fff;
  border-top: 1px solid var(--border);
  flex-shrink: 0;
}
.vl-chat-inputbar input {
  flex: 1;
  border: 1px solid var(--border-strong);
  border-radius: 999px;
  padding: 9px 16px;
  font-size: 14px;
  font-family: inherit;
  color: var(--text-0);
  outline: none;
  transition: border-color 0.2s, box-shadow 0.2s;
}
.vl-chat-inputbar input:focus { border-color: var(--blue); box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.12); }
.vl-chat-send {
  width: 40px; height: 40px;
  border-radius: 50%;
  border: none;
  background: var(--grad);
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
  transition: opacity 0.2s, transform 0.2s;
}
.vl-chat-send svg { width: 18px; height: 18px; stroke: #fff; }
.vl-chat-send:hover { transform: scale(1.06); }
.vl-chat-send:disabled { opacity: 0.5; transform: none; cursor: not-allowed; }

@media (max-width: 520px) {
  .vl-chat-panel { right: 12px; left: 12px; bottom: 88px; width: auto; height: min(70vh, 560px); }
  .vl-chat-fab { right: 16px; bottom: 16px; }
}

/* ---------- 预约弹窗（全站按需弹出） ---------- */
.vl-modal-overlay {
  position: fixed;
  inset: 0;
  z-index: 200;
  background: rgba(15, 23, 42, 0.45);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.28s, visibility 0.28s;
}
.vl-modal-overlay.open { opacity: 1; visibility: visible; }
.vl-modal {
  width: 100%;
  max-width: 600px;
  max-height: calc(100vh - 48px);
  overflow-y: auto;
  background: #fff;
  border-radius: 20px;
  padding: 36px;
  box-shadow: 0 32px 80px rgba(16, 34, 74, 0.3);
  position: relative;
  transform: translateY(20px) scale(0.97);
  transition: transform 0.28s cubic-bezier(0.22, 1, 0.36, 1);
}
.vl-modal-overlay.open .vl-modal { transform: none; }
.vl-modal h3 { font-size: 22px; margin-bottom: 8px; padding-right: 32px; }
.vl-modal > p { font-size: 14.5px; margin-bottom: 24px; }
.vl-modal-close {
  position: absolute;
  top: 18px; right: 18px;
  width: 34px; height: 34px;
  border: none;
  border-radius: 50%;
  background: var(--bg-1);
  color: var(--text-2);
  font-size: 20px;
  line-height: 1;
  transition: all 0.2s;
}
.vl-modal-close:hover { background: var(--bg-2); color: var(--text-0); }
body.vl-modal-lock { overflow: hidden; }

@media (max-width: 600px) {
  .vl-modal-overlay { padding: 12px; align-items: flex-end; }
  .vl-modal { padding: 28px 20px; max-height: 88vh; }
}

/* ---------- 预约表单控件 ---------- */
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-field { margin-bottom: 16px; }
.form-field label { display: block; font-size: 13.5px; font-weight: 600; color: var(--text-0); margin-bottom: 6px; }
.form-field input,
.form-field select,
.form-field textarea {
  width: 100%;
  border: 1px solid var(--border-strong);
  border-radius: 10px;
  padding: 10px 14px;
  font-size: 14.5px;
  font-family: inherit;
  color: var(--text-0);
  background: #fff;
  outline: none;
  transition: border-color 0.2s, box-shadow 0.2s;
}
.form-field textarea { resize: vertical; min-height: 96px; }
.form-field input:focus,
.form-field select:focus,
.form-field textarea:focus { border-color: var(--blue); box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.12); }
.form-field input.invalid { border-color: #ef4444; }
.form-actions { display: flex; align-items: center; gap: 16px; flex-wrap: wrap; margin-top: 4px; }
.form-msg { font-size: 13.5px; }
.form-msg.ok { color: #16a34a; }
.form-msg.err { color: #dc2626; }
.form-msg a { color: var(--blue); text-decoration: underline; }

@media (max-width: 600px) {
  .form-row { grid-template-columns: 1fr; gap: 0; }
}

/* ---------- 滚动渐入动画 ---------- */
.reveal { opacity: 0; transform: translateY(28px); transition: opacity 0.7s ease, transform 0.7s ease; }
.reveal.visible { opacity: 1; transform: none; }
.reveal-d1 { transition-delay: 0.08s; }
.reveal-d2 { transition-delay: 0.16s; }
.reveal-d3 { transition-delay: 0.24s; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
  .blob-drift, .badge::before, .scroll-hint::before { animation: none; }
}

/* ---------- 响应式 ---------- */
@media (max-width: 1024px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .steps { grid-template-columns: repeat(2, 1fr); }
  .stats-strip { grid-template-columns: repeat(2, 1fr); gap: 32px; }
  .feature-split { gap: 40px; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .nav-links a { padding: 8px 10px; font-size: 14px; }
}

@media (max-width: 768px) {
  .section { padding: 64px 0; }
  .grid-2, .grid-3 { grid-template-columns: 1fr; }
  .feature-split { grid-template-columns: 1fr; gap: 32px; }
  .feature-split.reverse .feature-media { order: 0; }
  .feature-split + .feature-split { margin-top: 64px; }

  .hamburger { display: block; }
  .nav-links {
    position: fixed;
    top: var(--nav-h);
    left: 0; right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 12px 20px 24px;
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
    box-shadow: 0 16px 32px rgba(16, 34, 74, 0.08);
    transform: translateY(-12px);
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s;
  }
  .nav-links.open { transform: none; opacity: 1; visibility: visible; }
  .nav-links a { padding: 14px 8px; font-size: 16px; border-bottom: 1px solid var(--border); }
  .nav-links a.active::after { display: none; }
  .nav-cta-desktop { display: none; }

  .hero { min-height: 88vh; }
  .hero-ctas .btn { width: 100%; max-width: 320px; }
  .biz-card { min-height: 0; }
  .cta-box { padding: 52px 24px; }
}

@media (max-width: 520px) {
  .grid-4, .steps, .stats-strip { grid-template-columns: 1fr; }
  .stats-strip { padding: 36px 24px; }
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
  .nav-logo .logo-en { display: none; }
}