:root{
  --bg:#0b1020;
  --card:#111832;
  --card2:#0f1730;
  --text:#eaf0ff;
  --muted:#a8b3d6;
  --line:rgba(255,255,255,.10);
  --brand:#6aa7ff;
  --brand2:#7cf3c8;
  --shadow: 0 12px 40px rgba(0,0,0,.35);
  --radius:18px;
}

*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, "PingFang SC","Hiragino Sans GB","Microsoft YaHei", Arial;
  color:var(--text);
  background:
    radial-gradient(900px 500px at 20% 10%, rgba(106,167,255,.22), transparent 60%),
    radial-gradient(900px 500px at 80% 10%, rgba(124,243,200,.16), transparent 60%),
    linear-gradient(180deg, var(--bg), #070a14);
  line-height:1.55;
}

a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
.container{width:min(1120px, 92%);margin:0 auto}

.sr-only{
  position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);border:0;
}

.header{
  position:sticky;top:0;z-index:50;
  backdrop-filter: blur(10px);
  background: rgba(11,16,32,.65);
  border-bottom:1px solid var(--line);
}
.header__inner{
  display:flex;align-items:center;justify-content:space-between;
  padding:14px 0;
}
.brand{display:flex;align-items:center;gap:10px}
.brand__logo{width:28px;height:28px}
.brand__logo-icon {
  max-height: 32px;   /* 强制限制 LOGO 高度 */
  width: auto;
  display: block;
  object-fit: contain;
}
.brand__name{font-weight:700;letter-spacing:.2px}

.nav__menu{display:flex;gap:18px;align-items:center}
.nav__menu a{color:var(--muted)}
.nav__menu a:hover{color:var(--text)}
.nav__toggle{display:none;background:none;border:0;color:var(--text);cursor:pointer;padding:8px;border-radius:10px}
.nav__toggleBars{
  width:22px;height:14px;display:inline-block;position:relative;
}
.nav__toggleBars::before,.nav__toggleBars::after,.nav__toggleBars span{
  content:"";position:absolute;left:0;right:0;height:2px;background:var(--text);border-radius:2px;
}
.nav__toggleBars::before{top:0}
.nav__toggleBars::after{bottom:0}
.nav__toggleBars span{top:6px}

.btn{
  display:inline-flex;align-items:center;justify-content:center;
  padding:12px 16px;border-radius:14px;
  border:1px solid var(--line);
  background: rgba(255,255,255,.06);
  color:var(--text);
  gap:8px;
}
.btn:hover{transform: translateY(-1px); transition:.15s ease; border-color: rgba(255,255,255,.18)}
.btn--primary{
  border-color: transparent;
  background: linear-gradient(135deg, var(--brand), var(--brand2));
  color:#071126;
  font-weight:700;
}
.btn--ghost{background:transparent}
.btn--sm{padding:10px 12px;border-radius:12px;font-size:14px}

.hero{padding:54px 0 22px}
.hero__grid{
  display:grid;grid-template-columns: 1.25fr .9fr;gap:22px;align-items:stretch;
}
.badge{
  display:inline-flex;align-items:center;gap:10px;
  padding:8px 12px;border-radius:999px;
  border:1px solid var(--line);
  background: rgba(255,255,255,.05);
  color:var(--muted);
}
h1{margin:14px 0 10px;font-size:48px;line-height:1.12}
.lead{margin:0 0 18px;color:var(--muted);font-size:16px;max-width:52ch}
.hero__cta{display:flex;gap:12px;flex-wrap:wrap;margin:14px 0 18px}

.hero__stats{
  display:grid;grid-template-columns: repeat(3, 1fr);
  gap:12px;margin-top:18px;
}
.stat{
  border:1px solid var(--line);
  background: rgba(255,255,255,.04);
  border-radius: var(--radius);
  padding:12px;
}
.stat__num{font-weight:800;font-size:20px}
.stat__label{color:var(--muted);font-size:13px}

.hero__card .card{height:100%}
.card{
  border:1px solid var(--line);
  background: linear-gradient(180deg, rgba(255,255,255,.06), rgba(255,255,255,.03));
  border-radius: var(--radius);
  padding:18px;
  box-shadow: var(--shadow);
}
.card--soft{background: rgba(255,255,255,.04); box-shadow:none}
.card__title{font-weight:800;margin-bottom:12px}
.checklist{margin:0;padding-left:18px;color:var(--muted)}
.checklist li{margin:8px 0}
.card__hint{display:flex;align-items:center;gap:10px;margin-top:14px;color:var(--muted);font-size:14px}
.dot{width:8px;height:8px;border-radius:999px;background: var(--brand2)}

.trust{padding:12px 0 6px}
.trust__row{display:flex;gap:12px;align-items:center;flex-wrap:wrap}
.trust__logos{display:flex;gap:10px;flex-wrap:wrap}
.pill{
  padding:8px 12px;border-radius:999px;
  border:1px solid var(--line);
  background: rgba(255,255,255,.04);
  color:var(--muted);
  font-size:14px;
}

.section{padding:56px 0}
.section--alt{
  background: linear-gradient(180deg, rgba(255,255,255,.03), transparent);
  border-top:1px solid var(--line);
  border-bottom:1px solid var(--line);
}
.section__head{margin-bottom:18px}
.section__head h2{margin:0 0 8px;font-size:28px}
.muted{color:var(--muted)}
.small{font-size:13px}

.grid3{display:grid;grid-template-columns: repeat(3, 1fr);gap:14px}
.grid2{display:grid;grid-template-columns: repeat(2, 1fr);gap:14px}

.feature,.case,.box{
  border:1px solid var(--line);
  background: rgba(255,255,255,.04);
  border-radius: var(--radius);
  padding:16px;
}
.feature h3,.case h3,.box h3{margin:0 0 8px}
.mini{margin:10px 0 0;padding-left:18px;color:var(--muted)}
.mini li{margin:6px 0}

.tags{display:flex;gap:8px;flex-wrap:wrap;margin-top:10px}
.tag{
  font-size:12px;color:var(--muted);
  border:1px solid var(--line);
  padding:6px 10px;border-radius:999px;
  background: rgba(255,255,255,.03);
}

.case__meta{color:var(--muted);font-size:13px;margin-bottom:8px}
.case__kpi{display:flex;gap:8px;flex-wrap:wrap;margin-top:10px}
.kpi{
  font-size:12px;
  border:1px solid var(--line);
  padding:6px 10px;border-radius:999px;
  background: rgba(255,255,255,.03);
  color:var(--muted);
}

.contact{
  display:grid;grid-template-columns: 1.2fr .8fr;gap:14px;align-items:start;
}
.form{
  border:1px solid var(--line);
  background: rgba(255,255,255,.04);
  border-radius: var(--radius);
  padding:16px;
}
label{display:block;color:var(--muted);font-size:13px;margin-bottom:10px}
input,textarea{
  width:100%;
  margin-top:6px;
  padding:12px 12px;
  border-radius: 14px;
  border:1px solid rgba(255,255,255,.12);
  background: rgba(7,12,24,.35);
  color: var(--text);
  outline:none;
}
input:focus,textarea:focus{border-color: rgba(124,243,200,.45)}
.form__row{display:grid;grid-template-columns: repeat(2, 1fr);gap:12px}
.form__actions{display:flex;align-items:center;gap:12px;flex-wrap:wrap;margin-top:8px}
.plain{margin:10px 0 0;padding-left:18px;color:var(--muted)}
.hr{border:0;border-top:1px solid var(--line);margin:14px 0}

.footer{
  padding:26px 0;
  border-top:1px solid var(--line);
  background: rgba(0,0,0,.12);
}
.footer__inner{display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap}
.brand--footer .brand__logo{width:22px;height:22px}
.footer-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 12px;
}

.footer-logo {
  height: 18px;       /* Footer 图标推荐尺寸 */
  width: auto;
  opacity: 0.9;       /* 稍微柔和一点 */
}

.footer-brand span {
  font-size: 16px;
  font-weight: 600;
  letter-spacing: 0.2px;
}

@media (max-width: 920px){
  h1{font-size:38px}
  .hero__grid{grid-template-columns: 1fr}
  .hero__stats{grid-template-columns: 1fr 1fr 1fr}
  .grid3{grid-template-columns: 1fr}
  .grid2{grid-template-columns: 1fr}
  .contact{grid-template-columns: 1fr}
}

@media (max-width: 720px){
  .nav__toggle{display:inline-flex}
  .nav__menu{
    display:none;
    position:absolute;
    top:60px; right:4%;
    background: rgba(11,16,32,.92);
    border:1px solid var(--line);
    border-radius: 16px;
    padding:12px;
    flex-direction:column;
    align-items:stretch;
    gap:10px;
    width:min(260px, 92vw);
    box-shadow: var(--shadow);
  }
  .nav__menu.is-open{display:flex}
  .hero__stats{grid-template-columns: 1fr}
}
.lang-switch {
  display: flex;
  gap: 10px;
  font-size: 14px;
}

.lang-switch a {
  opacity: 0.7;
}

.lang-switch a:hover {
  opacity: 1;
}