:root {
  /* 浅色商务风 · 主色企业蓝 + 点缀活力橙 */
  --brand: #1e50ae;
  --brand-deep: #16397f;
  --brand-soft: #eef3fb;
  --accent: #ff6537;
  --accent-2: #ff9a3d;

  --bg: #ffffff;
  --bg-soft: #f5f7fb;
  --bg-grad: linear-gradient(160deg, #0f2c5f 0%, #16397f 45%, #1e50ae 100%);

  --text: #14203a;
  --muted: #5a6478;
  --line: #e6ebf2;
  --surface: #ffffff;

  --radius: 16px;
  --radius-lg: 24px;
  --maxw: 1200px;
  --shadow-sm: 0 6px 20px -8px rgba(20, 32, 58, .12);
  --shadow: 0 24px 60px -24px rgba(20, 32, 58, .28);
  --shadow-brand: 0 16px 34px -12px rgba(30, 80, 174, .45);
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
a { color: inherit; text-decoration: none; }
h1, h2, h3 { line-height: 1.22; font-weight: 800; letter-spacing: -.01em; }
small { font-size: .62em; font-weight: 600; opacity: .85; }

/* ---------- 导航 ---------- */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 50;
  background: rgba(255, 255, 255, 0);
  transition: background .3s, box-shadow .3s, border-color .3s;
  border-bottom: 1px solid transparent;
}
.nav.is-scrolled {
  background: rgba(255, 255, 255, .92);
  backdrop-filter: saturate(180%) blur(14px);
  border-bottom-color: var(--line);
  box-shadow: 0 8px 30px -18px rgba(20, 32, 58, .25);
}
.nav__inner {
  max-width: var(--maxw); margin: 0 auto; padding: 16px 24px;
  display: flex; align-items: center; justify-content: space-between;
}
.brand { display: flex; align-items: center; gap: 11px; font-weight: 800; }
.brand__mark {
  width: 38px; height: 38px; border-radius: 10px; display: grid; place-items: center;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #fff; font-weight: 800; font-size: 19px;
  box-shadow: 0 8px 20px -8px var(--accent);
}
.brand__name { font-size: 18px; display: flex; align-items: baseline; gap: 6px; color: #fff; }
.brand__name small { color: #ffd7a8; }
.nav.is-scrolled .brand__name { color: var(--text); }
.nav.is-scrolled .brand__name small { color: var(--brand); }
.nav__links { display: flex; align-items: center; gap: 30px; font-size: 15px; }
.nav__links a { color: rgba(255,255,255,.85); font-weight: 500; transition: color .2s; }
.nav__links a:hover { color: #fff; }
.nav.is-scrolled .nav__links a { color: var(--muted); }
.nav.is-scrolled .nav__links a:hover { color: var(--brand); }
.nav__cta {
  padding: 9px 20px; border-radius: 999px; color: #fff !important; font-weight: 600;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  box-shadow: 0 10px 22px -10px var(--accent);
}
.nav__cta:hover { box-shadow: 0 14px 28px -10px var(--accent); color: #fff !important; }
.nav__toggle {
  display: none; flex-direction: column; gap: 5px; background: none; border: 0; cursor: pointer; padding: 6px;
}
.nav__toggle span { width: 24px; height: 2px; background: #fff; border-radius: 2px; transition: .3s; }
.nav.is-scrolled .nav__toggle span { background: var(--text); }
.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: 92svh; display: grid; place-items: center; padding: 150px 24px 90px; background: var(--bg-grad); color: #fff; overflow: hidden; }
.hero__bg { position: absolute; inset: 0; z-index: 0; }
.hero__bg::before {
  content: ""; position: absolute; inset: 0;
  background-image:
    radial-gradient(50% 45% at 12% 15%, rgba(255, 101, 55, .22), transparent 60%),
    radial-gradient(45% 50% at 88% 30%, rgba(255, 255, 255, .10), transparent 60%),
    radial-gradient(40% 40% at 60% 90%, rgba(30, 80, 174, .35), transparent 60%);
}
.hero__bg::after {
  content: ""; position: absolute; inset: 0;
  background-image: linear-gradient(rgba(255,255,255,.06) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,.06) 1px, transparent 1px);
  background-size: 54px 54px; opacity: .5;
  mask-image: radial-gradient(circle at 50% 35%, #000, transparent 78%);
}
.hero__inner { position: relative; z-index: 1; max-width: 920px; text-align: center; }
.hero__eyebrow {
  display: inline-flex; align-items: center; gap: 8px; font-size: 13px; letter-spacing: .12em;
  color: #fff; border: 1px solid rgba(255,255,255,.25); padding: 7px 16px; border-radius: 999px; margin-bottom: 26px;
  background: rgba(255,255,255,.08); backdrop-filter: blur(4px);
}
.hero__eyebrow b { color: var(--accent-2); }
.hero__title { font-size: clamp(32px, 5.6vw, 60px); margin-bottom: 20px; }
.hero__title .grad {
  background: linear-gradient(120deg, #ffd7a8, var(--accent-2) 55%, var(--accent));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.hero__sub { color: rgba(255,255,255,.82); font-size: clamp(15px, 2vw, 19px); max-width: 660px; margin: 0 auto 36px; }
.hero__actions { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }
.hero__badges { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; margin-top: 30px; }
.hero__badges span {
  font-size: 13px; color: rgba(255,255,255,.85); padding: 6px 14px; border-radius: 999px;
  background: rgba(255,255,255,.08); border: 1px solid rgba(255,255,255,.14);
}

/* ---------- 数据条 ---------- */
.stats { background: #fff; border-bottom: 1px solid var(--line); }
.stats__inner { max-width: var(--maxw); margin: 0 auto; padding: 40px 24px; display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.stat { text-align: center; }
.stat strong { display: block; font-size: clamp(26px, 4vw, 40px); font-weight: 800; color: var(--brand); }
.stat strong em { font-style: normal; font-size: .55em; }
.stat span { font-size: 14px; color: var(--muted); }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 14px 28px; border-radius: 999px; font-weight: 700; font-size: 15px; cursor: pointer;
  border: 1px solid transparent; transition: transform .18s, box-shadow .25s, background .25s;
}
.btn--primary { background: linear-gradient(135deg, var(--accent), var(--accent-2)); color: #fff; box-shadow: 0 14px 30px -12px rgba(255, 101, 55, .6); }
.btn--primary:hover { transform: translateY(-2px); box-shadow: 0 20px 38px -12px rgba(255, 101, 55, .7); }
.btn--light { background: #fff; color: var(--brand); box-shadow: 0 12px 30px -14px rgba(0,0,0,.4); }
.btn--light:hover { transform: translateY(-2px); }
.btn--ghost { border-color: var(--line); color: var(--brand); background: #fff; }
.btn--ghost:hover { border-color: var(--brand); background: var(--brand-soft); }
.btn--block { width: 100%; }

/* ---------- 区块通用 ---------- */
.section { max-width: var(--maxw); margin: 0 auto; padding: 100px 24px; }
.section--alt { max-width: none; background: var(--bg-soft); border-block: 1px solid var(--line); }
.section--alt > * { max-width: var(--maxw); margin-inline: auto; }
.section__head { text-align: center; margin-bottom: 58px; }
.kicker { font-size: 13px; letter-spacing: .22em; color: var(--accent); font-weight: 800; margin-bottom: 12px; text-transform: uppercase; }
.section__head h2 { font-size: clamp(26px, 4vw, 40px); color: var(--text); }
.section__head .lead { color: var(--muted); margin-top: 16px; font-size: 16px; max-width: 640px; margin-inline: auto; }

/* ---------- 行业方案（核心） ---------- */
.industry-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px; }
.ind-card {
  position: relative; background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius-lg);
  padding: 34px 26px 30px; text-align: center; overflow: hidden;
  transition: transform .28s, box-shadow .28s, border-color .28s;
  display: flex; flex-direction: column; align-items: center;
}
.ind-card::before {
  content: ""; position: absolute; inset: 0 0 auto 0; height: 4px;
  background: var(--c, var(--brand)); opacity: .9;
}
.ind-card:hover { transform: translateY(-6px); box-shadow: var(--shadow); border-color: transparent; }
.ind-icon {
  width: 66px; height: 66px; margin: 0 auto 18px; border-radius: 18px; display: grid; place-items: center;
  font-size: 32px; background: var(--c-soft, var(--brand-soft));
  box-shadow: inset 0 0 0 1px rgba(255,255,255,.5);
}
.ind-card h3 { font-size: 20px; margin-bottom: 10px; }
.ind-card p { color: var(--muted); font-size: 14.5px; min-height: 3.2em; line-height: 1.6; margin-bottom: auto; }
.ind-tags { display: grid; grid-template-columns: repeat(3, 1fr); gap: 6px; width: 100%; margin-top: 16px; }
.ind-tags span {
  font-size: 12px; color: var(--muted); padding: 5px 2px; border-radius: 999px;
  background: var(--bg-soft); border: 1px solid var(--line);
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis; text-align: center;
}
.ind-more {
  display: inline-flex; align-items: center; gap: 4px; margin-top: 14px; font-size: 13.5px; font-weight: 700;
  color: var(--c, var(--brand)); cursor: pointer;
}
.ind-more::after { content: "→"; transition: transform .2s; }
.ind-card:hover .ind-more::after { transform: translateX(4px); }

/* ---------- 卡片网格（产品能力） ---------- */
.grid { display: grid; gap: 22px; }
.grid--3 { grid-template-columns: repeat(3, 1fr); }
.card {
  background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius-lg);
  padding: 30px; transition: transform .25s, border-color .25s, box-shadow .25s;
}
.card:hover { transform: translateY(-4px); border-color: var(--brand); box-shadow: var(--shadow-sm); }
.card__icon {
  width: 52px; height: 52px; border-radius: 13px; display: grid; place-items: center;
  font-size: 26px; margin-bottom: 18px; background: var(--brand-soft);
}
.card h3 { font-size: 19px; margin-bottom: 8px; }
.card p { color: var(--muted); font-size: 15px; }

/* ---------- 分栏（价格） ---------- */
.split { display: grid; grid-template-columns: 1.05fr .95fr; gap: 44px; align-items: center; }
.check { list-style: none; display: grid; gap: 20px; }
.check li { position: relative; padding-left: 38px; color: var(--muted); font-size: 16px; }
.check li::before {
  content: "✓"; position: absolute; left: 0; top: 2px; width: 24px; height: 24px; border-radius: 7px;
  background: var(--brand); color: #fff; display: grid; place-items: center; font-size: 14px; font-weight: 800;
}
.check strong { color: var(--text); }
.split__panel { background: var(--bg-grad); border-radius: var(--radius-lg); padding: 36px; color: #fff; box-shadow: var(--shadow-brand); }
.price { display: grid; gap: 20px; }
.price__item { display: flex; align-items: baseline; justify-content: space-between; padding-bottom: 18px; border-bottom: 1px dashed rgba(255,255,255,.22); }
.price__item:last-child { border-bottom: 0; padding-bottom: 0; }
.price__num { font-size: 30px; font-weight: 800; color: #ffd7a8; }
.price__num small { font-size: 14px; color: rgba(255,255,255,.6); font-weight: 600; }
.price__label { color: rgba(255,255,255,.75); font-size: 14px; }
.price__note { color: rgba(255,255,255,.55); font-size: 13px; margin-top: 18px; }

/* ---------- 关于 ---------- */
.about { max-width: 800px; margin: 0 auto; text-align: center; color: var(--muted); font-size: 17px; display: grid; gap: 18px; }
.about strong { color: var(--text); }

/* ---------- 联系 ---------- */
.contact { max-width: 800px; text-align: center; }
.contact__inner { background: #fff; border: 1px solid var(--line); border-radius: var(--radius-lg); padding: 52px 36px; box-shadow: var(--shadow); }
.contact h2 { font-size: clamp(24px, 4vw, 34px); margin-bottom: 14px; }
.contact .lead { color: var(--muted); }
.form { margin-top: 32px; display: grid; gap: 16px; text-align: left; }
.form__row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form input {
  width: 100%; padding: 15px 18px; border-radius: 12px; border: 1px solid var(--line);
  background: var(--bg-soft); color: var(--text); font-size: 15px; outline: none; transition: border-color .2s, box-shadow .2s, background .2s;
}
.form input:focus { border-color: var(--brand); background: #fff; box-shadow: 0 0 0 3px rgba(30, 80, 174, .14); }
.form__hint { min-height: 20px; font-size: 14px; }
.form__hint.ok { color: #16a34a; }
.form__hint.err { color: #e11d48; }
.contact__direct { margin-top: 24px; color: var(--muted); font-size: 15px; display: flex; gap: 10px; justify-content: center; flex-wrap: wrap; }
.contact__direct a { color: var(--brand); font-weight: 700; }
.contact__direct .dot { opacity: .5; }

/* ---------- 页脚 ---------- */
.footer { border-top: 1px solid var(--line); background: #0f2c5f; color: rgba(255,255,255,.75); }
.footer__inner { max-width: var(--maxw); margin: 0 auto; padding: 36px 24px; text-align: center; }
.footer__brand { display: inline-flex; align-items: center; gap: 9px; font-weight: 800; color: #fff; margin-bottom: 10px; }
.footer__brand .brand__mark { width: 30px; height: 30px; font-size: 15px; border-radius: 8px; }
.footer__copy { font-size: 14px; }
.footer__links { font-size: 14px; margin-top: 6px; }
.footer__links a { color: #ffd7a8; font-weight: 600; }
.footer__links a:hover { text-decoration: underline; }
.footer__links .dot { opacity: .4; margin: 0 8px; }
.footer__icp { font-size: 13px; margin-top: 6px; }
.footer__icp a { color: #ffd7a8; }

/* ---------- 滚动揭示动画 ---------- */
.reveal { opacity: 0; transform: translateY(26px); transition: opacity .7s ease, transform .7s ease; }
.reveal.is-visible { opacity: 1; transform: none; }

/* ---------- 响应式 ---------- */
@media (max-width: 1024px) {
  .industry-grid { grid-template-columns: repeat(3, 1fr); }
}
@media (max-width: 900px) {
  .industry-grid { grid-template-columns: repeat(2, 1fr); }
  .grid--3 { grid-template-columns: 1fr 1fr; }
  .split { grid-template-columns: 1fr; }
  .stats__inner { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 680px) {
  .nav__links {
    position: fixed; inset: 66px 14px auto 14px; flex-direction: column; align-items: stretch; gap: 6px;
    background: rgba(255,255,255,.98); border: 1px solid var(--line); border-radius: 16px; padding: 14px;
    transform: translateY(-12px); opacity: 0; pointer-events: none; transition: .25s; box-shadow: var(--shadow);
  }
  .nav__links.is-open { transform: none; opacity: 1; pointer-events: auto; }
  .nav__links a { padding: 12px 14px; border-radius: 10px; color: var(--text); }
  .nav__links a:hover { background: var(--bg-soft); }
  .nav__cta { text-align: center; }
  .nav__toggle { display: flex; }
  .industry-grid { grid-template-columns: 1fr; }
  .grid--3 { grid-template-columns: 1fr; }
  .section { padding: 72px 20px; }
  .form__row { grid-template-columns: 1fr; }
  .contact__inner { padding: 38px 22px; }
  .stats__inner { grid-template-columns: repeat(2, 1fr); gap: 26px; }
}
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  html { scroll-behavior: auto; }
}