/* ============================================================
   龙智造工业云 · 官网样式（浅色科技风）
   蓝色主调 #2563EB + 青色科技强调 #22D3EE · 白色卡片 · 玻璃导航
   ============================================================ */

:root {
  /* 色板 */
  --c-primary: #2563EB;
  --c-primary-600: #1D4ED8;
  --c-secondary: #3B82F6;
  --c-cyan: #22D3EE;
  --c-cyan-500: #06B6D4;
  --c-green: #34D399;
  --c-amber: #F59E0B;

  /* 浅色背景层 */
  --bg: #F8FAFC;
  --bg-card: #FFFFFF;
  --bg-tint: #EFF4FC;
  --bg-tint-2: #F1F5FB;

  /* 文字 */
  --ink: #1E293B;
  --ink-soft: #475569;
  --ink-faint: #94A3B8;
  --ink-invert: #FFFFFF;

  /* 描边 / 玻璃 */
  --border: #E2E8F0;
  --border-soft: #EDF2F9;
  --glass: rgba(255, 255, 255, 0.72);

  /* 阴影 */
  --shadow-sm: 0 1px 3px rgba(15, 23, 42, 0.06);
  --shadow: 0 10px 30px -12px rgba(15, 23, 42, 0.18);
  --shadow-lg: 0 22px 50px -20px rgba(37, 99, 235, 0.28);
  --shadow-glow: 0 0 0 1px rgba(34, 211, 238, 0.35), 0 18px 44px -18px rgba(37, 99, 235, 0.4);

  /* 圆角 / 布局 */
  --radius: 18px;
  --radius-sm: 12px;
  --maxw: 1180px;
  --font: "PingFang SC", -apple-system, BlinkMacSystemFont, "Segoe UI", "Microsoft YaHei", "Hiragino Sans GB", sans-serif;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--font);
  color: var(--ink-soft);
  background: var(--bg);
  line-height: 1.75;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

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

/* ---------- 背景装饰（浅色柔光） ---------- */
.bg-grid {
  position: fixed; inset: 0; z-index: -3;
  background:
    linear-gradient(rgba(37, 99, 235, 0.05) 1px, transparent 1px) 0 0 / 46px 46px,
    linear-gradient(90deg, rgba(37, 99, 235, 0.05) 1px, transparent 1px) 0 0 / 46px 46px,
    linear-gradient(180deg, var(--bg-tint) 0%, var(--bg) 42%, var(--bg) 100%);
}
.bg-glow {
  position: fixed; z-index: -2; border-radius: 50%;
  filter: blur(100px); opacity: 0.5; pointer-events: none;
}
.bg-glow--1 { width: 520px; height: 520px; top: -160px; right: -60px;
  background: radial-gradient(circle, rgba(59, 130, 246, 0.28), transparent 70%); }
.bg-glow--2 { width: 460px; height: 460px; top: 40%; left: -160px;
  background: radial-gradient(circle, rgba(34, 211, 238, 0.22), transparent 70%); }
.bg-glow--3 { width: 420px; height: 420px; bottom: -120px; right: 8%;
  background: radial-gradient(circle, rgba(37, 99, 235, 0.18), transparent 70%); }

/* ---------- 通用容器 / 区块 ---------- */
.section { max-width: var(--maxw); margin: 0 auto; padding: 100px 24px; }
.section__head { text-align: center; max-width: 720px; margin: 0 auto 56px; }
.kicker {
  display: inline-block; font-size: 12px; letter-spacing: 3px; font-weight: 700;
  color: var(--c-primary); margin-bottom: 14px;
  padding: 5px 14px; border: 1px solid rgba(37, 99, 235, 0.25);
  border-radius: 999px; background: rgba(37, 99, 235, 0.06);
}
.section__title { font-size: 42px; font-weight: 800; color: var(--ink); line-height: 1.2; letter-spacing: .5px; }
.section__desc { margin-top: 16px; font-size: 16px; color: var(--ink-soft); }

.grad-text {
  background: linear-gradient(100deg, var(--c-cyan-500), var(--c-primary) 75%);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 13px 28px; border-radius: 999px; font-weight: 600; font-size: 15px;
  cursor: pointer; transition: transform .25s ease, box-shadow .25s ease, background .25s ease, color .25s;
  border: 1px solid transparent; white-space: nowrap;
}
.btn--sm { padding: 9px 20px; font-size: 14px; }
.btn--primary {
  color: #fff; background: linear-gradient(100deg, var(--c-primary), var(--c-secondary));
  box-shadow: 0 12px 28px -10px rgba(37, 99, 235, 0.5);
}
.btn--primary:hover { transform: translateY(-2px); box-shadow: 0 18px 40px -12px rgba(37, 99, 235, 0.6); }
.btn--ghost {
  color: var(--c-primary); background: rgba(37, 99, 235, 0.05);
  border-color: rgba(37, 99, 235, 0.3);
}
.btn--ghost:hover { transform: translateY(-2px); border-color: var(--c-primary); background: rgba(37, 99, 235, 0.1); color: var(--c-primary-600); }

/* ---------- 导航（玻璃白） ---------- */
.nav {
  position: sticky; top: 0; z-index: 50;
  transition: background .3s ease, border-color .3s ease, box-shadow .3s ease;
  border-bottom: 1px solid transparent;
}
.nav.is-stuck {
  background: var(--glass);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom-color: var(--border);
  box-shadow: var(--shadow-sm);
}
.nav__inner {
  max-width: var(--maxw); margin: 0 auto; padding: 14px 24px;
  display: flex; align-items: center; justify-content: space-between; gap: 18px;
}
.nav__brand { display: flex; align-items: center; gap: 12px; }
.brand-logo {
  height: auto; width: auto; overflow: hidden; flex-shrink: 0;
  display: grid; place-items: center;
}
.brand-logo__img { width: 165px; height: auto; max-height: 52px; }
.brand-logo__fallback { display: none; }
.brand-logo--fallback .brand-logo__img { display: none; }
.brand-logo--fallback .brand-logo__fallback { display: grid; }

.nav__links { display: flex; gap: 6px; }
.nav__links a {
  position: relative; color: var(--ink-soft); font-size: 15px; font-weight: 500;
  padding: 8px 16px; border-radius: 10px; transition: color .2s ease, background .2s ease;
}
.nav__links a:hover { color: var(--c-primary); background: rgba(37, 99, 235, 0.06); }
.nav__links a.active { color: var(--c-primary); background: rgba(37, 99, 235, 0.1); }

.nav__actions { display: flex; align-items: center; gap: 12px; }
.nav__toggle {
  display: none; flex-direction: column; gap: 5px; width: 42px; height: 42px;
  align-items: center; justify-content: center; background: var(--bg-card);
  border: 1px solid var(--border); border-radius: 10px; cursor: pointer; color: var(--ink);
}
.nav__toggle span { width: 20px; height: 2px; background: var(--ink); border-radius: 2px; transition: .25s; }
.nav__toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav__toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav__toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ---------- Hero ---------- */
.hero {
  position: relative; min-height: 90vh; display: flex; flex-direction: column;
  align-items: center; justify-content: center; text-align: center; padding: 90px 24px 56px;
}
.hero__inner { max-width: 880px; }
.hero__badge {
  display: inline-flex; align-items: center; gap: 9px; padding: 7px 16px;
  border: 1px solid var(--border); border-radius: 999px; background: var(--bg-card);
  color: var(--ink-soft); font-size: 13px; margin-bottom: 26px; box-shadow: var(--shadow-sm);
}
.hero__badge .dot {
  width: 8px; height: 8px; border-radius: 50%; background: var(--c-green);
  box-shadow: 0 0 10px var(--c-green); animation: pulse 2s infinite;
}
@keyframes pulse { 0%,100% { opacity: 1; } 50% { opacity: .35; } }

.hero__title { font-size: 64px; font-weight: 800; color: var(--ink); line-height: 1.12; letter-spacing: 1px; }
.hero__sub { margin: 26px auto 36px; max-width: 660px; font-size: 17px; color: var(--ink-soft); }
.hero__cta { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }
.hero__tags { display: flex; gap: 10px; justify-content: center; flex-wrap: wrap; margin-top: 40px; }
.hero__tags li {
  font-size: 13px; color: var(--c-primary); padding: 6px 14px; border-radius: 999px;
  background: rgba(37, 99, 235, 0.06); border: 1px solid rgba(37, 99, 235, 0.18);
}
.hero__scroll { position: absolute; bottom: 26px; left: 50%; transform: translateX(-50%);
  display: flex; flex-direction: column; align-items: center; gap: 8px; color: var(--ink-faint); }
.hero__scroll em { font-size: 10px; letter-spacing: 3px; }
.mouse { width: 24px; height: 38px; border: 2px solid var(--ink-faint); border-radius: 14px; position: relative; }
.mouse span { position: absolute; top: 7px; left: 50%; transform: translateX(-50%); width: 4px; height: 7px; background: var(--c-primary); border-radius: 2px; animation: scrollDot 1.8s infinite; }
@keyframes scrollDot { 0% { opacity: 0; top: 7px; } 40% { opacity: 1; } 100% { opacity: 0; top: 20px; } }

/* ---------- 核心数据 ---------- */
.stats { max-width: var(--maxw); margin: 0 auto; padding: 0 24px; transform: translateY(-30px); }
.stats__inner {
  display: grid; grid-template-columns: repeat(5, 1fr); gap: 1px;
  background: var(--border); border: 1px solid var(--border); border-radius: var(--radius);
  overflow: hidden; background: var(--bg-card); box-shadow: var(--shadow-lg);
}
.stat { background: var(--bg-card); padding: 30px 18px; text-align: center; }
.stat__num { font-size: 38px; font-weight: 800; color: var(--ink); display: flex; align-items: baseline; justify-content: center; gap: 2px; }
.stat__num .count { background: linear-gradient(100deg, var(--c-cyan-500), var(--c-primary)); -webkit-background-clip: text; background-clip: text; color: transparent; font-variant-numeric: tabular-nums; }
.stat__num i { font-style: normal; font-size: 18px; color: var(--ink-soft); font-weight: 600; }
.stat__label { margin-top: 8px; font-size: 13px; color: var(--ink-soft); }

/* ---------- 网格 ---------- */
.grid { display: grid; gap: 22px; }
.grid--3 { grid-template-columns: repeat(3, 1fr); }
.grid--4 { grid-template-columns: repeat(4, 1fr); }

/* ---------- 卡片通用（白卡浅色） ---------- */
.card, .svc, .pf, .sol, .news {
  position: relative; background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 28px; box-shadow: var(--shadow-sm);
  transition: transform .3s ease, border-color .3s ease, box-shadow .3s ease, background .3s ease;
  overflow: hidden;
}
.card:hover, .svc:hover, .pf:hover, .sol:hover, .news:hover {
  transform: translateY(-6px); border-color: rgba(34, 211, 238, 0.55);
  box-shadow: var(--shadow-glow); background: linear-gradient(180deg, #fff, var(--bg-tint));
}
.card::before, .svc::before, .pf::before, .sol::before, .news::before {
  content: ""; position: absolute; inset: 0; border-radius: var(--radius);
  background: radial-gradient(360px circle at var(--mx, 50%) var(--my, 0%), rgba(34, 211, 238, 0.16), transparent 45%);
  opacity: 0; transition: opacity .3s ease; pointer-events: none;
}
.card:hover::before, .svc:hover::before, .pf:hover::before, .sol:hover::before, .news:hover::before { opacity: 1; }

.card__icon, .svc__icon {
  width: 54px; height: 54px; border-radius: 14px; display: grid; place-items: center;
  color: var(--c-primary); background: linear-gradient(140deg, rgba(59, 130, 246, 0.14), rgba(34, 211, 238, 0.14));
  border: 1px solid rgba(37, 99, 235, 0.18); margin-bottom: 18px;
}
.card h3, .svc h3, .pf h3, .sol h3 { font-size: 19px; color: var(--ink); font-weight: 700; margin-bottom: 10px; }
.card p, .svc p, .pf p, .sol p { font-size: 14px; }

.chips { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 16px; }
.chips li { font-size: 12px; color: var(--c-primary); padding: 4px 11px; border-radius: 999px; background: rgba(37, 99, 235, 0.07); border: 1px solid rgba(37, 99, 235, 0.16); }

.tag { display: inline-block; font-size: 12px; padding: 5px 13px; border-radius: 999px; margin-bottom: 14px; }
.tag--cyan { color: var(--c-cyan-500); background: rgba(6, 182, 212, 0.1); border: 1px solid rgba(6, 182, 212, 0.3); }

/* ---------- 数智链主卡 ---------- */
.product-hero {
  display: grid; grid-template-columns: 0.9fr 1.1fr; gap: 30px; align-items: center;
  background: linear-gradient(135deg, rgba(37, 99, 235, 0.1), rgba(34, 211, 238, 0.08));
  border: 1px solid rgba(37, 99, 235, 0.22); border-radius: 24px; padding: 38px; margin-bottom: 26px;
  box-shadow: var(--shadow);
}
.product-hero__media {
  border-radius: 18px; background: rgba(255, 255, 255, 0.7); border: 1px solid var(--border);
  min-height: 220px; display: grid; place-items: center; padding: 20px;
}
.product-hero__body h3 { font-size: 26px; color: var(--ink); font-weight: 800; margin-bottom: 14px; }
.product-hero__body p { font-size: 15px; }
.product-hero__body .chips { margin-top: 18px; }

/* ---------- 解决方案 ---------- */
.sol__art { height: 96px; display: grid; place-items: center; color: var(--c-primary); margin-bottom: 16px; }
.sol__art svg { max-width: 120px; }
.sol__list { margin-top: 14px; display: flex; flex-direction: column; gap: 8px; }
.sol__list li { position: relative; padding-left: 20px; font-size: 13px; color: var(--ink-soft); }
.sol__list li::before { content: "▹"; position: absolute; left: 0; color: var(--c-cyan-500); }

/* ---------- 服务 ---------- */
.svc__list { margin-top: 14px; display: flex; flex-direction: column; gap: 8px; }
.svc__list li { position: relative; padding-left: 18px; font-size: 13px; color: var(--ink-soft); }
.svc__list li::before { content: ""; position: absolute; left: 0; top: 9px; width: 6px; height: 6px; border-radius: 50%; background: var(--c-cyan); }

/* ---------- 平台功能 ---------- */
.pf__no { font-size: 30px; font-weight: 800; color: rgba(37, 99, 235, 0.3); display: block; margin-bottom: 10px; }

/* ---------- 价值主张 ---------- */
.value .card__icon { margin-bottom: 16px; }

/* ---------- 关于我们 ---------- */
.about__grid { display: grid; grid-template-columns: 0.95fr 1.05fr; gap: 52px; align-items: center; }
.about__text p { margin-top: 16px; font-size: 15px; }

/* 关于我们 · 左侧视觉 */
.about__visual { position: relative; }
.about__panel {
  background: var(--bg-card); border: 1px solid var(--border); border-radius: 22px;
  box-shadow: var(--shadow-lg); padding: 22px 22px 18px;
}
.about__panel__dots { display: flex; gap: 6px; margin-bottom: 16px; }
.about__panel__dots span { width: 9px; height: 9px; border-radius: 50%; background: #E2E8F0; }
.about__panel__dots span:nth-child(1) { background: #FDA4AF; }
.about__panel__dots span:nth-child(2) { background: #FCD34D; }
.about__panel__dots span:nth-child(3) { background: #6EE7B7; }
.about__panel svg { width: 100%; height: auto; display: block; }
.about__stats { display: grid; grid-template-columns: repeat(2, 1fr); gap: 12px; margin-top: 16px; }
.about__stat {
  padding: 12px 14px; border-radius: 12px; background: var(--bg-tint);
  border: 1px solid var(--border);
}
.about__stat strong { display: block; font-size: 18px; font-weight: 800; color: var(--c-primary); }
.about__stat em { font-style: normal; font-size: 12px; color: var(--ink-faint); }
.about__visual-badge {
  position: absolute; left: 50%; bottom: -16px; transform: translateX(-50%);
  white-space: nowrap; padding: 9px 18px; border-radius: 999px; font-size: 13px; font-weight: 600;
  color: var(--c-primary); background: #fff; border: 1px solid rgba(37, 99, 235, 0.25);
  box-shadow: var(--shadow);
}
.about__honor {
  display: flex; align-items: center; gap: 16px; margin-top: 28px; padding: 20px;
  border: 1px solid rgba(245, 158, 11, 0.35); border-radius: var(--radius);
  background: linear-gradient(135deg, rgba(245, 158, 11, 0.1), transparent);
}
.about__honor .medal { color: var(--c-amber); }
.about__honor strong { display: block; color: var(--ink); font-size: 16px; }
.about__honor em { font-style: normal; font-size: 13px; color: var(--ink-soft); }

/* ---------- 资讯 ---------- */
.news { display: flex; flex-direction: column; gap: 10px; cursor: pointer; }
.news__src { font-size: 12px; color: var(--c-primary); font-weight: 600; }
.news h3 { font-size: 16px; color: var(--ink); font-weight: 600; line-height: 1.5; flex: 1; }
.news__date { font-size: 12px; color: var(--ink-faint); }

/* ---------- CTA 横幅 ---------- */
.cta-band {
  max-width: var(--maxw); margin: 0 auto; padding: 64px 24px;
}
.cta-band__inner {
  position: relative; overflow: hidden; text-align: center; border-radius: 28px;
  padding: 56px 28px;
  background: linear-gradient(120deg, var(--c-primary), var(--c-secondary) 55%, var(--c-cyan-500));
  box-shadow: var(--shadow-lg);
}
.cta-band__inner::after {
  content: ""; position: absolute; inset: 0;
  background: radial-gradient(600px 300px at 85% -20%, rgba(255, 255, 255, 0.25), transparent 60%);
  pointer-events: none;
}
.cta-band h2 { position: relative; color: #fff; font-size: 32px; font-weight: 800; }
.cta-band p { position: relative; color: rgba(255, 255, 255, 0.92); margin: 14px 0 28px; }
.cta-band .btn--accent {
  position: relative; color: var(--c-primary); background: #fff;
  box-shadow: 0 14px 34px -12px rgba(0, 0, 0, 0.35);
}
.cta-band .btn--accent:hover { transform: translateY(-2px); }

/* ---------- 页脚 ---------- */
.footer { border-top: 1px solid var(--border); margin-top: 60px; background: var(--bg-tint-2); }
.footer__top {
  max-width: var(--maxw); margin: 0 auto; padding: 56px 24px 36px;
  display: grid; grid-template-columns: 1.1fr 1.6fr; gap: 40px;
}
.footer__brand { display: flex; gap: 14px; align-items: flex-start; }
.footer__brand .brand-logo { box-shadow: var(--shadow-sm); }
.footer__brand strong { display: block; color: var(--ink); font-size: 18px; }
.footer__brand p { font-size: 13px; color: var(--ink-soft); margin-top: 4px; }
.footer__cols { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.footer__cols h4 { color: var(--ink); font-size: 15px; margin-bottom: 14px; }
.footer__cols p, .footer__cols a { display: block; font-size: 13px; color: var(--ink-soft); margin-bottom: 8px; transition: color .2s; }
.footer__cols a:hover { color: var(--c-primary); }
.footer__bottom {
  max-width: var(--maxw); margin: 0 auto; padding: 20px 24px; border-top: 1px solid var(--border);
  display: flex; justify-content: space-between; flex-wrap: wrap; gap: 8px; font-size: 12px; color: var(--ink-soft);
}
.footer__bottom a { color: var(--c-primary); }

/* ---------- 详情页 Hero ---------- */
.detail-hero {
  position: relative; padding: 132px 24px 72px; overflow: hidden;
  background: linear-gradient(180deg, var(--bg-tint), var(--bg) 72%);
}
.detail-hero::before {
  content: ""; position: absolute; top: -140px; right: -90px;
  width: 440px; height: 440px; border-radius: 50%;
  background: radial-gradient(circle, rgba(59, 130, 246, 0.18), transparent 70%);
  filter: blur(80px); pointer-events: none;
}
.detail-hero .container { max-width: var(--maxw); margin: 0 auto; }
.hero-grid { display: grid; grid-template-columns: 1.05fr 0.95fr; gap: 44px; align-items: center; }
.hero-text { position: relative; }
.product-icon-lg {
  width: 72px; height: 72px; border-radius: 18px; display: grid; place-items: center;
  color: #fff; background: linear-gradient(135deg, var(--c-secondary), var(--c-primary));
  box-shadow: 0 14px 30px -10px rgba(37, 99, 235, 0.5); margin-bottom: 22px;
}
.product-icon-lg svg { width: 36px; height: 36px; }
.eyebrow {
  display: inline-block; font-size: 12px; letter-spacing: 2px; font-weight: 700;
  color: var(--c-primary); text-transform: uppercase; margin-bottom: 12px;
}
.detail-hero h1 { font-size: 42px; font-weight: 800; color: var(--ink); line-height: 1.18; letter-spacing: .5px; }
.hero-lead { margin: 18px 0 28px; font-size: 16px; color: var(--ink-soft); max-width: 540px; }
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; }

.detail-hero__visual { position: relative; }
.hero-card {
  background: var(--bg-card); border: 1px solid var(--border); border-radius: 20px;
  padding: 26px; box-shadow: var(--shadow-lg); display: flex; flex-direction: column; gap: 14px;
}
.hero-card .module {
  background: var(--bg-tint); border: 1px solid var(--border); border-radius: 14px;
  padding: 16px 18px; box-shadow: var(--shadow-sm);
}
.hero-card .module h4 { display: flex; align-items: center; gap: 10px; color: var(--ink); font-size: 15px; font-weight: 600; }
.hero-card .module h4 svg { flex-shrink: 0; }
.progress-bar { height: 8px; border-radius: 999px; background: #E5ECF5; margin-top: 12px; overflow: hidden; }
.progress-bar span { display: block; height: 100%; border-radius: 999px; background: linear-gradient(90deg, var(--c-cyan), var(--c-primary)); }
.float-badge {
  position: absolute; padding: 8px 14px; border-radius: 999px; font-size: 13px; font-weight: 600;
  color: var(--c-primary); background: #fff; border: 1px solid rgba(37, 99, 235, 0.25); box-shadow: var(--shadow);
}
.float-badge.top { top: -16px; right: 18px; }
.float-badge.bottom { bottom: -16px; left: 18px; }

/* 详情页通用 */
.section-alt { background: var(--bg-tint-2); }
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 22px; }
.breadcrumb { max-width: var(--maxw); margin: 0 auto; padding: 20px 24px 0; font-size: 13px; color: var(--ink-faint); }
.breadcrumb a { color: var(--c-primary); }
.breadcrumb a:hover { text-decoration: underline; }

/* ---------- 滚动揭示 ---------- */
.reveal { opacity: 0; transform: translateY(34px); transition: opacity .7s ease, transform .7s ease; }
.reveal.in-view { opacity: 1; transform: none; }

/* ---------- 响应式 ---------- */
@media (max-width: 1023px) {
  .section { padding: 84px 22px; }
  .section__title { font-size: 34px; }
  .hero__title { font-size: 50px; }
  .grid--3, .grid--4 { grid-template-columns: repeat(2, 1fr); }
  .stats__inner { grid-template-columns: repeat(3, 1fr); }
  .product-hero { grid-template-columns: 1fr; }
  .about__grid { grid-template-columns: 1fr; }
  .footer__top { grid-template-columns: 1fr; }
}

@media (max-width: 767px) {
  .nav__links {
    position: fixed; inset: 60px 0 auto 0; flex-direction: column; gap: 0;
    background: var(--glass); backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px);
    border-bottom: 1px solid var(--border); padding: 12px 0;
    transform: translateY(-130%); transition: transform .35s ease; z-index: 49;
  }
  .nav__links.open { transform: translateY(0); }
  .nav__links a { padding: 14px 24px; border-radius: 0; }
  .nav__links a.active, .nav__links a:hover { background: rgba(37, 99, 235, 0.08); }
  .nav__toggle { display: flex; }
  .section__title { font-size: 28px; }
  .hero__title { font-size: 38px; }
  .hero__sub { font-size: 15px; }
  .grid--3, .grid--4 { grid-template-columns: 1fr; }
  .stats__inner { grid-template-columns: repeat(2, 1fr); }
  .stat__num { font-size: 30px; }
  .footer__cols { grid-template-columns: 1fr 1fr; }
  .footer__bottom { flex-direction: column; }
  .cta-band h2 { font-size: 25px; }
}

@media (max-width: 1023px) {
  .hero-grid { grid-template-columns: 1fr; }
  .detail-hero { padding-top: 112px; }
  .detail-hero h1 { font-size: 32px; }
  .grid-2 { grid-template-columns: 1fr; }
}

/* ---------- 咨询弹窗 ---------- */
.contact-modal {
  position: fixed; inset: 0; z-index: 999; display: none;
  align-items: center; justify-content: center; padding: 24px;
  background: rgba(15, 23, 42, 0.5); backdrop-filter: blur(4px);
}
.contact-modal.is-open { display: flex; animation: cm-fade .25s ease; }
.contact-modal__card {
  position: relative; width: 100%; max-width: 420px; padding: 38px 32px 30px;
  background: var(--bg-card); border: 1px solid var(--border); border-radius: 20px;
  box-shadow: var(--shadow-lg); text-align: center; animation: cm-pop .28s cubic-bezier(.2,.8,.2,1);
}
.contact-modal__close {
  position: absolute; top: 14px; right: 16px; width: 34px; height: 34px; border: none;
  border-radius: 50%; background: var(--bg-tint); color: var(--ink-soft); font-size: 20px;
  line-height: 1; cursor: pointer; transition: background .2s ease, color .2s ease;
}
.contact-modal__close:hover { background: rgba(37, 99, 235, 0.12); color: var(--c-primary); }
.contact-modal__icon {
  width: 64px; height: 64px; margin: 0 auto 18px; border-radius: 18px; display: grid; place-items: center;
  color: #fff; background: linear-gradient(135deg, var(--c-cyan), var(--c-primary));
  box-shadow: 0 14px 30px -10px rgba(37, 99, 235, 0.5);
}
.contact-modal__icon svg { width: 32px; height: 32px; }
.contact-modal__title { font-size: 20px; font-weight: 700; color: var(--ink); margin-bottom: 6px; }
.contact-modal__sub { font-size: 13px; color: var(--ink-soft); margin-bottom: 22px; }
.contact-modal__row { padding: 16px; border-radius: 14px; background: var(--bg-tint); border: 1px solid var(--border); }
.contact-modal__row + .contact-modal__row { margin-top: 12px; }
.contact-modal__label { font-size: 12px; color: var(--ink-faint); letter-spacing: 1px; }
.contact-modal__num {
  display: inline-block; margin-top: 6px; font-size: 26px; font-weight: 800; letter-spacing: .5px;
  color: var(--c-primary); text-decoration: none;
}
.contact-modal__num:hover { text-decoration: underline; }
@keyframes cm-fade { from { opacity: 0; } to { opacity: 1; } }
@keyframes cm-pop { from { opacity: 0; transform: translateY(16px) scale(.98); } to { opacity: 1; transform: none; } }
@media (prefers-reduced-motion: reduce) {
  .contact-modal.is-open, .contact-modal__card { animation: none; }
}

/* ---------- 可访问性：减少动效 ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation: none !important; transition: none !important; }
  .reveal { opacity: 1; transform: none; }
}