/* 红烁AI 品牌基础样式（取自官网配色：深红主色 + 橙强调 + 暖米浅底） */
:root{
  --hs-red:#d00103;        /* 主色 */
  --hs-red-deep:#b71c1c;
  --hs-orange:#ff6d00;     /* 强调 */
  --hs-orange-light:#ffab40;
  --hs-warm:#fff5f2;       /* 暖底 */
  --hs-warm2:#ece3dd;
  --hs-ink:#1d1d1f;
  --hs-gray:#6b6b70;
  --hs-line:#eadfd9;
  --hs-bg:#faf6f3;
  --hs-card:#ffffff;
  --hs-shadow:0 10px 40px rgba(183,28,28,.08);
  --hs-radius:16px;
}
*{box-sizing:border-box}
body{
  margin:0;font-family:Arial,"PingFang SC","Microsoft YaHei",-apple-system,sans-serif;
  color:var(--hs-ink);background:var(--hs-bg);
  -webkit-font-smoothing:antialiased;line-height:1.6;
}
a{color:inherit;text-decoration:none}

/* 顶栏 */
.hs-header{
  display:flex;align-items:center;justify-content:space-between;
  padding:14px 28px;background:#fff;border-bottom:1px solid var(--hs-line);
  position:sticky;top:0;z-index:20;
}
.hs-header .logo{display:flex;align-items:center;gap:10px}
.hs-header .logo img{height:38px;width:auto;display:block}
.hs-header .tag{font-size:13px;color:var(--hs-gray)}
.hs-header .phone{font-size:14px;color:var(--hs-red);font-weight:700}

/* 通用按钮 */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  border:none;cursor:pointer;font-size:16px;font-weight:700;
  padding:14px 26px;border-radius:12px;transition:.18s;font-family:inherit;
}
.btn-primary{background:linear-gradient(135deg,var(--hs-red),var(--hs-orange));color:#fff;box-shadow:0 8px 22px rgba(208,1,3,.28)}
.btn-primary:hover{transform:translateY(-1px);box-shadow:0 12px 28px rgba(208,1,3,.36)}
.btn-primary:disabled{opacity:.55;cursor:not-allowed;transform:none}
.btn-ghost{background:#fff;color:var(--hs-red);border:1.5px solid var(--hs-line)}
.btn-ghost:hover{border-color:var(--hs-orange);color:var(--hs-orange)}

.hs-footer{text-align:center;color:var(--hs-gray);font-size:13px;padding:32px 16px}
.hs-footer b{color:var(--hs-red)}

/* ===== 官网导航（与主站 source.html 完全一致）===== */
.navbar{background:rgba(255,255,255,.72);backdrop-filter:saturate(180%) blur(20px);-webkit-backdrop-filter:saturate(180%) blur(20px);position:sticky;top:0;z-index:1000;border-bottom:1px solid rgba(0,0,0,.08)}
.navbar .container{max-width:1280px;margin:0 auto;padding:0 24px;display:flex;align-items:center}
.nav-inner{display:flex;align-items:center;justify-content:space-between;padding:1rem 0;width:100%}
.navbar .logo{display:flex;align-items:flex-start;flex-direction:column;text-decoration:none}
.navbar .logo img{height:42px;width:auto;display:block;border-radius:4px}
.logo-slogan{font-size:.75rem;font-weight:500;letter-spacing:2px;color:#86868b;margin-top:2px;opacity:.85;text-align:right;width:100%}
.nav-menu{display:flex;gap:.15rem;align-items:center;flex-wrap:nowrap;flex:1;justify-content:space-between;margin-left:2rem}
.nav-menu.show{display:flex}
.nav-item{position:relative}
.nav-link{display:inline-block;padding:.5rem .6rem;font-weight:500;color:#424245;border-radius:4px;transition:.2s;font-size:1rem;cursor:pointer;letter-spacing:-.02em;position:relative;white-space:nowrap;text-decoration:none}
.nav-link:hover{color:#D32F2F;background:rgba(211,47,47,.04);transform:translateY(-1px)}
.nav-link.active{color:#D32F2F;font-weight:600;background:transparent}
.nav-link.active::after{content:"";position:absolute;bottom:0;left:50%;transform:translateX(-50%);width:60%;height:2px;background:#D32F2F;border-radius:2px}
.nav-action{display:flex;align-items:center;gap:.6rem;margin-left:.8rem}
.btn-phone{color:#D32F2F;font-weight:800;font-size:1.15rem;display:flex;align-items:center;gap:8px;letter-spacing:.3px;text-decoration:none;white-space:nowrap}
.mobile-toggle{display:none;font-size:1.5rem;background:none;border:none;color:#D32F2F;cursor:pointer;padding-right:12px}
@media(max-width:980px){
  .mobile-toggle{display:block}
  .nav-menu{display:none;width:100%;flex-direction:column;background:#fff;padding:1rem 0;position:absolute;top:100%;left:0;box-shadow:0 6px 16px rgba(22,22,40,.07),0 18px 40px rgba(22,22,40,.09);border-radius:0 0 4px 4px;margin-left:0;flex:none}
  .nav-menu.show{display:flex}
  .nav-action{margin:1rem 0 0!important;justify-content:center}
}

/* ---- 手机端适配 ---- */
@media(max-width:560px){
  .hs-header{padding:11px 15px}
  .hs-header .logo img{height:30px}
  .hs-header .phone{font-size:13px}
  .btn{padding:13px 20px;font-size:15px}
}

/* 提示条 */
.toast{
  position:fixed;left:50%;top:24px;transform:translateX(-50%) translateY(-12px);
  background:#1d1d1f;color:#fff;padding:12px 22px;border-radius:10px;font-size:14px;
  transition:.28s;z-index:99;box-shadow:0 12px 30px rgba(0,0,0,.25);max-width:88vw;
  opacity:0;visibility:hidden;pointer-events:none;   /* 平时彻底隐藏，与高度无关 */
}
.toast.show{transform:translateX(-50%) translateY(0);opacity:1;visibility:visible}
.toast.err{background:#b71c1c}
.toast.ok{background:#1f7a44}