/* ===== 设计系统 · 深色科技�?===== */
:root {
  --bg: #05100c;
  --bg-2: #0a1512;
  --surface: rgba(255, 255, 255, .028);
  --surface-2: rgba(255, 255, 255, .05);
  --border: rgba(150, 200, 180, .12);
  --border-hi: rgba(52, 211, 153, .5);
  --blue: #34d399;
  --blue-2: #10b981;
  --cyan: #5eead4;
  --ink: #eaf5ef;
  --muted: #94ac9f;
  --muted-2: #64766c;
  --radius: 20px;
  --radius-sm: 14px;
  --maxw: 1200px;
  --shadow: 0 30px 70px rgba(0, 0, 0, .45);
  --font: "PingFang SC", "Microsoft YaHei", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --mono: "SF Mono", "JetBrains Mono", "Cascadia Code", Consolas, monospace;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 100px; }
body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--ink);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}
a { text-decoration: none; color: inherit; }
img { display: block; max-width: 100%; }

.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }
.grad {
  background: linear-gradient(100deg, var(--blue), var(--cyan));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

/* ===== 背景装饰 ===== */
.bg-fx { position: fixed; inset: 0; z-index: -1; overflow: hidden; pointer-events: none; }
.bg-grid {
  position: absolute; inset: -2px;
  background-image:
    linear-gradient(rgba(150, 200, 180, .045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(150, 200, 180, .045) 1px, transparent 1px);
  background-size: 54px 54px;
  mask-image: radial-gradient(ellipse 90% 60% at 50% 0%, #000 40%, transparent 100%);
  -webkit-mask-image: radial-gradient(ellipse 90% 60% at 50% 0%, #000 40%, transparent 100%);
}
.bg-glow { position: absolute; border-radius: 50%; filter: blur(90px); opacity: .5; }
.bg-glow--1 { width: 620px; height: 620px; top: -220px; left: 50%; transform: translateX(-50%); background: radial-gradient(circle, #10b981, transparent 70%); }
.bg-glow--2 { width: 500px; height: 500px; top: 40%; right: -180px; background: radial-gradient(circle, #0d9488, transparent 70%); opacity: .35; }

/* ===== 按钮 ===== */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  font-size: 15px; font-weight: 600;
  padding: 11px 22px; border-radius: 999px;
  border: 1px solid transparent; cursor: pointer;
  transition: transform .18s ease, box-shadow .25s ease, background .25s ease, border-color .25s ease, color .25s;
  white-space: nowrap;
}
.btn--lg { padding: 15px 30px; font-size: 16px; }
.btn--primary {
  background: linear-gradient(180deg, var(--blue), var(--blue-2));
  color: #fff;
  box-shadow: 0 8px 24px rgba(16, 185, 129, .35);
}
.btn--primary:hover { transform: translateY(-2px); box-shadow: 0 14px 34px rgba(16, 185, 129, .5); }
.btn--outline { background: transparent; border-color: var(--border); color: var(--ink); }
.btn--outline:hover { border-color: var(--border-hi); background: var(--surface-2); transform: translateY(-2px); }
.btn--ghost { background: var(--surface); border-color: var(--border); color: var(--ink); }
.btn--ghost:hover { border-color: var(--border-hi); color: #fff; }

/* ===== 导航�?===== */
.nav { position: sticky; top: 0; z-index: 50; padding: 16px 24px; }
.nav__inner {
  max-width: var(--maxw); margin: 0 auto;
  display: flex; align-items: center; gap: 20px;
  padding: 10px 12px 10px 22px;
  background: rgba(10, 21, 18, .6);
  border: 1px solid var(--border);
  border-radius: 999px;
  backdrop-filter: saturate(160%) blur(16px);
  -webkit-backdrop-filter: saturate(160%) blur(16px);
}
.nav__logo img { height: 30px; width: auto; }
.nav__links { display: flex; gap: 4px; margin: 0 auto; }
.nav__link {
  font-size: 15px; font-weight: 500; color: var(--muted);
  padding: 8px 16px; border-radius: 999px;
  transition: background .2s, color .2s;
}
.nav__link:hover { background: var(--surface-2); color: #fff; }
.nav__actions { display: flex; gap: 10px; }
.nav__toggle {
  display: none; flex-direction: column; gap: 5px;
  width: 42px; height: 42px; border: 1px solid var(--border);
  background: var(--surface); border-radius: 12px; cursor: pointer;
  align-items: center; justify-content: center;
}
.nav__toggle span { display: block; width: 20px; height: 2px; background: var(--ink); border-radius: 2px; transition: .3s; }
.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 { padding: 70px 24px 40px; }
.hero__inner {
  max-width: var(--maxw); margin: 0 auto;
  display: grid; grid-template-columns: 1.08fr .92fr; gap: 48px; align-items: center;
}
.tag {
  display: inline-flex; align-items: center; gap: 9px;
  padding: 7px 15px; border-radius: 999px;
  background: var(--surface); border: 1px solid var(--border);
  font-size: 13px; color: var(--muted); margin-bottom: 26px;
}
.tag__dot { width: 7px; height: 7px; border-radius: 50%; background: var(--cyan); box-shadow: 0 0 10px var(--cyan); }
.hero__title { font-size: clamp(40px, 5.4vw, 66px); font-weight: 800; line-height: 1.08; letter-spacing: -.02em; margin-bottom: 22px; }
.hero__sub { font-size: 17px; color: var(--muted); max-width: 500px; margin-bottom: 32px; }
.hero__cta { display: flex; gap: 14px; flex-wrap: wrap; margin-bottom: 40px; }
.hero__stats { display: flex; align-items: center; gap: 26px; flex-wrap: wrap; }
.stat__num { font-size: 26px; font-weight: 800; color: #fff; }
.stat__num span { color: var(--blue); }
.stat__label { font-size: 13px; color: var(--muted); }
.stat__div { width: 1px; height: 34px; background: var(--border); }

/* Hero 视觉：AI 能力中枢 */
.hero__visual { position: relative; display: grid; place-items: center; min-height: 420px; }
.orbit { position: relative; width: 100%; max-width: 400px; aspect-ratio: 1 / 1; margin: auto; }
.orbit__glow {
  position: absolute; inset: 18%; border-radius: 50%;
  background: radial-gradient(circle, rgba(16, 185, 129, .45), transparent 70%);
  filter: blur(34px);
}
.orbit__ring { position: absolute; border-radius: 50%; }
.orbit__ring--outer { inset: 0; border: 1px dashed rgba(148, 170, 210, .22); animation: spin 46s linear infinite; }
.orbit__ring--inner { inset: 18%; border: 1px solid rgba(148, 170, 210, .1); }
@keyframes spin { to { transform: rotate(360deg); } }

.orbit__core {
  position: absolute; top: 50%; left: 50%; transform: translate(-50%, -50%);
  width: 40%; aspect-ratio: 1 / 1; border-radius: 50%;
  display: grid; place-items: center; align-content: center; gap: 3px; text-align: center;
  background: linear-gradient(160deg, rgba(16, 185, 129, .28), rgba(10, 21, 18, .7));
  border: 1px solid var(--border-hi);
  box-shadow: 0 0 46px rgba(16, 185, 129, .4), inset 0 0 24px rgba(52, 211, 153, .22);
  animation: corePulse 4s ease-in-out infinite;
}
@keyframes corePulse { 50% { box-shadow: 0 0 64px rgba(16, 185, 129, .6), inset 0 0 24px rgba(52, 211, 153, .3); } }
.orbit__core svg { width: 30px; height: 30px; color: var(--cyan); }
.orbit__core b { font-size: 15px; color: #fff; letter-spacing: .01em; }
.orbit__core span { font-size: 11px; color: var(--muted); }

.node {
  position: absolute; display: inline-flex; align-items: center; gap: 7px;
  padding: 8px 14px; border-radius: 999px;
  font-size: 13px; font-weight: 600; color: var(--ink); white-space: nowrap;
  background: rgba(12, 18, 34, .92); border: 1px solid var(--border);
  backdrop-filter: blur(8px); box-shadow: 0 10px 26px rgba(0, 0, 0, .45);
}
.node i { display: grid; place-items: center; color: var(--blue); }
.node i svg { width: 16px; height: 16px; }
.node--t { top: 0; left: 50%; transform: translate(-50%, -50%); }
.node--r { top: 50%; right: 0; transform: translate(50%, -50%); }
.node--b { bottom: 0; left: 50%; transform: translate(-50%, 50%); }
.node--l { top: 50%; left: 0; transform: translate(-50%, -50%); }

.chip {
  position: absolute; z-index: 3;
  display: inline-flex; align-items: center; gap: 8px;
  padding: 10px 16px; border-radius: 999px; font-size: 13px; font-weight: 600; color: var(--ink);
  background: rgba(12, 18, 34, .85); border: 1px solid var(--border);
  backdrop-filter: blur(8px); box-shadow: 0 10px 30px rgba(0, 0, 0, .4);
}
.chip--1 { top: 4%; right: 2%; }
.chip--2 { bottom: 4%; left: 2%; color: var(--muted); }
.chip__pulse { width: 8px; height: 8px; border-radius: 50%; background: #28c840; box-shadow: 0 0 0 0 rgba(40, 200, 64, .6); animation: pulse 1.8s infinite; }
@keyframes pulse { 70% { box-shadow: 0 0 0 8px rgba(40, 200, 64, 0); } 100% { box-shadow: 0 0 0 0 rgba(40, 200, 64, 0); } }

/* ===== 通用区块�?===== */
.section { padding: 70px 0; }
.head { text-align: center; max-width: 640px; margin: 0 auto 48px; }
.eyebrow {
  display: inline-block; font-size: 12px; font-weight: 700; letter-spacing: .18em;
  text-transform: uppercase; color: var(--blue); margin-bottom: 14px;
}
.head__title { font-size: clamp(28px, 3.8vw, 46px); font-weight: 800; letter-spacing: -.01em; line-height: 1.16; }
.head__desc { color: var(--muted); font-size: 16px; margin-top: 14px; }

/* ===== Bento 网格 ===== */
.bento {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
}
.tile {
  position: relative;
  display: flex; flex-direction: column;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 26px;
  transition: transform .25s ease, border-color .25s ease, background .25s ease;
  overflow: hidden;
}
.tile:hover { transform: translateY(-5px); border-color: var(--border-hi); background: var(--surface-2); }
.tile__ico {
  width: 46px; height: 46px; border-radius: 13px;
  display: grid; place-items: center; color: var(--blue);
  background: rgba(52, 211, 153, .12); border: 1px solid rgba(52, 211, 153, .22);
  margin-bottom: 18px;
}
.tile__ico svg { width: 24px; height: 24px; }
.tile__title { font-size: 19px; font-weight: 700; margin-bottom: 10px; color: #fff; }
.tile__text { font-size: 14.5px; color: var(--muted); }
.tile__link {
  margin-top: auto; padding-top: 16px; font-size: 14px; font-weight: 600; color: var(--blue);
  display: inline-flex; align-items: center; gap: 6px; align-self: flex-start;
}
.tile__link span { transition: transform .2s; }
.tile__link:hover span { transform: translateX(4px); }
.tile__meta { margin-top: auto; padding-top: 16px; font-size: 13px; color: var(--muted-2); }

/* 能力条：整行 */
.tile--strip {
  grid-column: 1 / -1;
  flex-direction: row; flex-wrap: wrap; gap: 20px;
  padding: 26px 30px;
  background: linear-gradient(120deg, rgba(16, 185, 129, .1), rgba(94, 234, 212, .05));
}
.tile--strip:hover { transform: none; }
.strip__item { flex: 1; min-width: 160px; display: flex; flex-direction: column; gap: 4px; }
.strip__item b { font-size: 17px; color: #fff; }
.strip__item span { font-size: 13.5px; color: var(--muted); }

/* ===== 关于我们 ===== */
.about {
  display: grid; grid-template-columns: 1.1fr .9fr; gap: 48px; align-items: center;
  background: var(--surface); border: 1px solid var(--border);
  border-radius: 28px; padding: 52px;
}
.about__text { color: var(--muted); font-size: 16px; margin: 20px 0 24px; }
.about__intro .head__title { font-size: clamp(24px, 2.4vw, 32px); line-height: 1.28; }
.about__list { list-style: none; display: grid; gap: 12px; }
.about__list li { position: relative; padding-left: 30px; font-size: 15px; color: var(--ink); }
.about__list li::before {
  content: "�?; position: absolute; left: 0; top: 1px;
  width: 20px; height: 20px; border-radius: 50%;
  background: linear-gradient(180deg, var(--blue), var(--blue-2)); color: #fff;
  font-size: 12px; display: grid; place-items: center;
}

.contact {
  position: relative; overflow: hidden; text-align: center;
  background: linear-gradient(170deg, #0d1a15, #0a1512);
  border: 1px solid var(--border); border-radius: var(--radius); padding: 34px;
}
.contact__glow { position: absolute; top: -80px; left: 50%; transform: translateX(-50%); width: 300px; height: 200px; background: radial-gradient(circle, rgba(16, 185, 129, .35), transparent 70%); filter: blur(30px); }
.contact__title, .contact__qr, .contact__hint, .contact__item { position: relative; z-index: 1; }
.contact__title { font-size: 20px; font-weight: 700; margin-bottom: 22px; }
.contact__qr { display: flex; justify-content: center; margin-bottom: 16px; }
.qr__img {
  width: 240px; height: 240px; object-fit: cover;
  border-radius: var(--radius-sm); padding: 10px; background: #fff;
  border: 1px solid var(--border);
  box-shadow: 0 10px 30px rgba(0, 0, 0, .35);
}
.contact__hint { font-size: 13px; color: var(--muted); margin-bottom: 22px; }
.contact__item { text-align: left; padding: 14px 0; border-top: 1px solid var(--border); }
.ci__label { display: block; font-size: 12px; color: var(--muted-2); margin-bottom: 4px; }
.ci__value { font-size: 14.5px; color: var(--ink); }
.ci__link { color: var(--cyan); }
.ci__link:hover { text-decoration: underline; }

/* ===== 页脚 ===== */
.footer { border-top: 1px solid var(--border); margin-top: 40px; padding: 44px 0 34px; }
.footer__inner { display: flex; justify-content: space-between; align-items: center; gap: 30px; flex-wrap: wrap; }
.footer__logo { height: 30px; margin-bottom: 12px; }
.footer__slogan { color: var(--muted); font-size: 14px; }
.footer__nav { display: flex; gap: 26px; flex-wrap: wrap; }
.footer__nav a { color: var(--muted); font-size: 14.5px; font-weight: 500; transition: color .2s; }
.footer__nav a:hover { color: var(--blue); }
.footer__contact { flex-basis: 100%; }
.footer__addr { color: var(--muted); font-size: 14px; display: flex; align-items: baseline; gap: 10px; }
.footer__addr-label { color: var(--muted-2); font-size: 12px; padding: 2px 9px; border-radius: 999px; background: var(--surface-2); border: 1px solid var(--border); }
.footer__bottom {
  display: flex; justify-content: center; align-items: center; gap: 8px 20px; flex-wrap: wrap;
  text-align: center; color: var(--muted-2); font-size: 13px; margin-top: 30px; padding-top: 24px; border-top: 1px solid var(--border);
}
.footer__beian { color: var(--muted-2); transition: color .2s; }
.footer__beian:hover { color: var(--blue); }

/* ===== 响应�?===== */
@media (max-width: 980px) {
  .hero__inner { grid-template-columns: 1fr; gap: 40px; }
  .hero__visual { order: -1; min-height: 300px; }
  .bento { grid-template-columns: repeat(2, 1fr); }
  .about { grid-template-columns: 1fr; gap: 36px; padding: 36px; }
}
@media (max-width: 820px) {
  .nav__inner { justify-content: space-between; }
  .nav__links, .nav__actions { display: none; }
  .nav__toggle { display: flex; }
  .nav__links.show {
    display: flex; flex-direction: column; position: absolute;
    top: 78px; left: 24px; right: 24px; margin: 0; gap: 4px;
    background: rgba(10, 21, 18, .96); border: 1px solid var(--border);
    padding: 14px; border-radius: var(--radius-sm); backdrop-filter: blur(16px);
  }
  .nav__link { text-align: center; }
}
@media (max-width: 620px) {
  .hero__content { display: flex; flex-direction: column; align-items: center; }
  .bento { grid-template-columns: 1fr; }
  .tile--strip { flex-direction: column; }
  .hero__title { font-size: 38px; }
  .hero__stats { gap: 16px; }
  .stat__num { font-size: 22px; }
  .about { padding: 28px 22px; }
  .contact { padding: 28px 22px; }
}