:root{
  --bg0:#070A12;
  --bg1:#0A0F1F;
  --bg2:#0B142C;
  --card: rgba(255,255,255,.06);
  --card2: rgba(255,255,255,.08);
  --stroke: rgba(255,255,255,.10);
  --text:#EAF0FF;
  --muted: rgba(234,240,255,.70);
  --muted2: rgba(234,240,255,.50);

  --r:#FF4D9D;
  --g:#00E7FF;
  --b:#8A5CFF;
  --c:#35F7A5;

  --shadow: 0 14px 50px rgba(0,0,0,.55);
  --radius: 18px;
  --radius2: 22px;
  --max: 1200px;
}

*{ box-sizing:border-box; }
html,body{ height:100%; }
body{
   padding-top: 22px;
  margin:0;
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", Arial, sans-serif;
  color:var(--text);
  background:
    radial-gradient(1200px 600px at 20% 10%, rgba(138,92,255,.20), transparent 60%),
    radial-gradient(900px 500px at 80% 20%, rgba(0,231,255,.18), transparent 55%),
    radial-gradient(900px 700px at 60% 90%, rgba(255,77,157,.14), transparent 60%),
    linear-gradient(180deg, var(--bg0), var(--bg2) 55%, var(--bg0));
  overflow-x:hidden;
}

a{ color:inherit; text-decoration:none; }
.container{ width:min(var(--max), calc(100% - 48px)); margin:0 auto; }

/* ===== Topbar ===== */
.topbar{
  position: fixed;          /* ✅ PC+手机都稳定固定 */
  top: 0;
  left: 0;
  right: 0;
  z-index: 999;

  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  background: linear-gradient(180deg, rgba(7,10,18,.82), rgba(7,10,18,.55));
  border-bottom: 1px solid rgba(255,255,255,.08);
}
.nav{
  height:68px;
  display:flex; align-items:center; justify-content:space-between;
  gap:18px;
}
.brand{
  display:flex; align-items:center; gap:10px;
  font-weight:700; letter-spacing:.4px;
}

.logo{
  width:129px;
  height:34px;
  border-radius:10px;
  background: url("./images/icons/logo.png") center / contain no-repeat;
  box-shadow: 0 8px 22px rgba(0,0,0,.5);
  border: none;
  display: inline-block;
  filter: drop-shadow(0 6px 16px rgba(0,0,0,.45));
}
/*
.logo{
  width:129px; height:34px; border-radius:10px;
  background:
    radial-gradient(14px 14px at 30% 30%, rgba(255,255,255,.55), transparent 60%),
    linear-gradient(135deg, rgba(138,92,255,.85), rgba(0,231,255,.65), rgba(255,77,157,.70));
  box-shadow: 0 8px 22px rgba(0,0,0,.5);
  border:1px solid rgba(255,255,255,.18);
}
*/

.navlinks{
  display:flex; align-items:center; gap:22px;
  color:var(--muted);
  font-size:14px;
}
.navlinks a{
  position:relative;
  padding:8px 6px;
  transition: color .2s ease, opacity .2s ease;
}
.navlinks a:hover{ color:var(--text); }
.navlinks a.active{
  color: var(--text);
}
.navlinks a.active::after{
  opacity: 1;
  transform: translateY(0);
}
.navlinks a::after{
  content:"";
  position:absolute; left:6px; right:6px; bottom:2px;
  height:2px; border-radius:99px;
  background: linear-gradient(90deg, rgba(138,92,255,.0), rgba(0,231,255,.9), rgba(255,77,157,.0));
  opacity:0; transform: translateY(4px);
  transition: .22s ease;
}
.navlinks a:hover::after{ opacity:1; transform: translateY(0); }

.nav-right{ display:flex; align-items:center; gap:10px; }
.btn{
  display:inline-flex; align-items:center; justify-content:center;
  height:38px; padding:0 14px;
  border-radius:999px;
  border:1px solid rgba(255,255,255,.12);
  background: rgba(255,255,255,.05);
  color:var(--text);
  font-size:14px;
  transition: transform .15s ease, background .2s ease, border-color .2s ease;
}
.btn:hover{
  background: rgba(255,255,255,.08);
  border-color: rgba(255,255,255,.18);
  transform: translateY(-1px);
}
.btn.primary{
  border-color: rgba(0,231,255,.35);
  background: linear-gradient(135deg, rgba(0,231,255,.12), rgba(138,92,255,.10), rgba(255,77,157,.10));
  box-shadow: 0 10px 30px rgba(0,0,0,.35);
}
.hamburger{ display:none; width:42px; height:38px; border-radius:12px; }
.hamburger svg{ opacity:.9; }

/* ===== Mobile drawer ===== */
.drawer{
  position:fixed; inset:0;
  background: rgba(0,0,0,.55);
  backdrop-filter: blur(6px);
  display:none;
  z-index: 80;
}
.drawer.open{ display:block; }
.panel{
  position:absolute; right:16px; top:80px;
  width:min(360px, calc(100% - 32px));
  border-radius: 18px;
  background: linear-gradient(180deg, rgba(20,26,45,.92), rgba(10,15,31,.92));
  border:1px solid rgba(255,255,255,.10);
  box-shadow: var(--shadow);
  padding: 12px;
}
.panel a{
  display:flex; align-items:center; justify-content:space-between;
  padding: 12px 12px;
  border-radius: 14px;
  color: rgba(234,240,255,.85);
  border:1px solid transparent;
}
.panel a:hover{
  border-color: rgba(255,255,255,.12);
  background: rgba(255,255,255,.05);
}
.chev{ opacity:.65; }

/* ===== Page hero ===== */
.hero{
  padding: 64px 0 34px;
  position:relative;
}
.hero::before{
  content:"";
  position:absolute; inset:-180px -140px auto -140px;
  height:420px;
  background:
    radial-gradient(320px 240px at 25% 55%, rgba(138,92,255,.18), transparent 60%),
    radial-gradient(360px 260px at 60% 35%, rgba(0,231,255,.16), transparent 60%),
    radial-gradient(360px 260px at 80% 70%, rgba(255,77,157,.12), transparent 60%);
  filter: blur(2px);
  pointer-events:none;
}
.hero-inner{ text-align:center; }
.kicker{
  display:inline-flex; align-items:center; gap:10px;
  padding:8px 14px;
  border-radius:999px;
  border:1px solid rgba(255,255,255,.10);
  background: rgba(255,255,255,.04);
  color: var(--muted);
  font-size:13px;
}
.dot{
  width:10px; height:10px; border-radius:999px;
  background: linear-gradient(135deg, var(--b), var(--g), var(--r));
  box-shadow: 0 0 0 3px rgba(255,255,255,.05);
}
h1{
  margin:18px 0 10px;
  font-size: clamp(34px, 5vw, 56px);
  letter-spacing: .6px;
  line-height:1.1;
  text-shadow: 0 18px 60px rgba(0,0,0,.6);
}
.subtitle{
  margin:0 auto;
  width:min(760px, 100%);
  color: var(--muted);
  font-size: 15.5px;
  line-height:1.7;
}
.hero-about{
  text-align: left;
  margin-bottom: 20px;
}
.hero-about > .kicker{
  text-align: center;
  margin-bottom: 18px;
}
.hero-about-row{
  display: grid;
  grid-template-columns: 300px 1fr;
  gap: 40px;
  align-items: start;
  margin-top: 18px;
}
.hero-about-left{
  text-align: left;
}
.hero-about-left h1{
  margin: 0;
}
.hero-about-right .subtitle{
  max-width: none;
  text-align: left;
  margin: 0;
}
@media (max-width: 768px){
  .hero-about{
    text-align: center;
  }
  .hero-about-row{
    grid-template-columns: 1fr;
    gap: 20px;
  }
  .hero-about-left{
    text-align: center;
  }
  .hero-about-right .subtitle{
    text-align: center;
  }
}

/* ===== Cards ===== */
.cards{
  margin-top: 30px;
  display:grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}
.card{
  border-radius: var(--radius2);
  background: linear-gradient(180deg, rgba(255,255,255,.06), rgba(255,255,255,.035));
  border:1px solid rgba(255,255,255,.10);
  box-shadow: var(--shadow);
  padding: 18px 18px 16px;
  position:relative;
  overflow:hidden;
}
.card::after{
  content:"";
  position:absolute; inset:-80px -120px auto -120px;
  height:160px;
  background:
    radial-gradient(160px 90px at 20% 70%, rgba(0,231,255,.10), transparent 60%),
    radial-gradient(160px 90px at 55% 25%, rgba(138,92,255,.10), transparent 60%),
    radial-gradient(160px 90px at 85% 80%, rgba(255,77,157,.08), transparent 60%);
  pointer-events:none;
  filter: blur(4px);
}
.accent{
  width:44px; height:3px; border-radius:999px;
  background: linear-gradient(90deg, var(--b), var(--g));
  margin-bottom: 12px;
}
.card:nth-child(2) .accent{ background: linear-gradient(90deg, var(--g), var(--c)); }
.card:nth-child(3) .accent{ background: linear-gradient(90deg, var(--c), var(--r)); }

.card h3{ margin:0 0 8px; font-size:16px; }
.card p{ margin:0; color: var(--muted2); font-size:13px; line-height:1.6; }

/* ===== Section ===== */
section{ padding: 46px 0 70px; }
.section-head{
  display:flex; align-items:flex-end; justify-content:space-between;
  gap: 16px;
  border-top: 1px solid rgba(255,255,255,.07);
  padding-top: 26px;
  margin-top: 16px;
}
.section-title{ margin:0; font-size: 30px; letter-spacing:.4px; }
.section-desc{
  margin:8px 0 0;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.7;
  max-width: 720px;
}
.backtop{
  color: var(--muted2);
  font-size: 13px;
  padding: 8px 12px;
  border-radius: 999px;
  border:1px solid rgba(255,255,255,.10);
  background: rgba(255,255,255,.04);
  transition:.2s ease;
  white-space:nowrap;
}
.backtop:hover{ color: var(--text); border-color: rgba(255,255,255,.16); }

/* ===== Product grid ===== */
.grid{
  margin-top: 18px;
  display:grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}
.product{
  border-radius: var(--radius2);
  background: linear-gradient(180deg, rgba(255,255,255,.06), rgba(255,255,255,.03));
  border:1px solid rgba(255,255,255,.10);
  box-shadow: var(--shadow);
  overflow:hidden;
  position:relative;
}
.product .media{
  height: 210px;
  background:
    radial-gradient(120px 120px at 20% 30%, rgba(138,92,255,.50), transparent 60%),
    radial-gradient(150px 120px at 75% 35%, rgba(0,231,255,.40), transparent 60%),
    radial-gradient(180px 140px at 55% 80%, rgba(255,77,157,.30), transparent 65%),
    linear-gradient(135deg, rgba(255,255,255,.06), rgba(255,255,255,.02));
  position:relative;
  border-bottom: 1px solid rgba(255,255,255,.08);
}
.product .badge{
  position:absolute; top:14px; left:14px;
  font-size:12px;
  color: rgba(255,255,255,.85);
  padding: 7px 10px;
  border-radius:999px;
  border:1px solid rgba(255,255,255,.14);
  background: rgba(0,0,0,.25);
  backdrop-filter: blur(10px);
}
.product .content{ padding: 14px 14px 16px; }
.product h4{ margin: 0 0 8px; font-size: 16px; }
.product p{
  margin: 0 0 14px;
  color: var(--muted2);
  font-size: 13px;
  line-height: 1.65;
  min-height: 42px;
}
.product .actions{
  display:flex; align-items:center; justify-content:space-between;
  gap:10px;
}
.link{
  display:inline-flex; align-items:center; gap:8px;
  color: rgba(234,240,255,.85);
  font-size: 13px;
  padding: 8px 10px;
  border-radius: 12px;
  border:1px solid rgba(255,255,255,.10);
  background: rgba(255,255,255,.03);
  transition: .2s ease;
}
.link:hover{
  border-color: rgba(0,231,255,.25);
  background: rgba(255,255,255,.05);
  transform: translateY(-1px);
}
.price{ color: rgba(234,240,255,.72); font-size: 13px; }

/* ===== Footer ===== */
footer{
  border-top: 1px solid rgba(255,255,255,.08);
  padding: 26px 0 34px;
  color: rgba(234,240,255,.55);
  font-size: 13px;
}
.foot{
  display:flex; align-items:center; justify-content:space-between;
  gap: 14px;
  flex-wrap:wrap;
}
.foot a{ color: rgba(234,240,255,.70); }
.foot a:hover{ color: var(--text); }

/* ===== Responsive ===== */
@media (max-width: 980px){
  .cards{ grid-template-columns: 1fr; }
  .grid{ grid-template-columns: 1fr; }
  .navlinks{ display:none; }
  .hamburger{ display:inline-flex; align-items:center; justify-content:center; }
  .hero{ padding-top: 46px; }
}


/* ===== Color Flow Bar (smooth + noise + subtle pulse) ===== */
.color-flow-bar{
  height: 2px;
  width: 100%;
  position: relative;
  z-index: 49; /* under topbar(50) */
  overflow: hidden;

  /* 彩虹带：360px 对应你 Delphi 的 FRainbow.Width */
  background: linear-gradient(
  90deg,
  #ff4d9d 0%,
  #ff3f7e 6%,
  #ff5a4d 12%,
  #ffb84d 18%,
  #f7ff4d 24%,
  #35f7a5 32%,
  #00e7ff 42%,
  #00a8ff 52%,
  #4d6bff 62%,
  #8a5cff 72%,
  #c14dff 82%,
  #ff4d9d 100%
);
  background-size: 720px 100%;
  background-position-x: 0px;

  /* 发光（别太夸张） */
  box-shadow:
    0 0 14px rgba(0,231,255,.28),
    0 0 18px rgba(255,77,157,.18);

  filter: saturate(1.2);
}

/* 极淡“噪点纹理”叠层 */
.color-flow-bar::after{
  content:"";
  position:absolute;
  inset:-6px; /* 稍微放大，避免边缘出现空白 */
  pointer-events:none;
  opacity: .1; /* 极淡 */
  mix-blend-mode: overlay;

  /* 轻量噪点：SVG turbulence（无需额外图片文件） */
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='220' height='16'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='220' height='16' filter='url(%23n)' opacity='.35'/%3E%3C/svg%3E");
  background-size: 220px 16px;
  background-repeat: repeat;
}

/* 轻微亮度脉冲（很轻很高级） */
@keyframes flowPulse{
  0%, 100% { filter: saturate(1.2) brightness(1.00); }
  50%      { filter: saturate(1.25) brightness(1.08); }
}
.color-flow-bar.pulse{
  animation: flowPulse 2.6s ease-in-out infinite;
}

/* ========== Product Detail: WiFi Pro ========== */
.product-hero { padding-top: 38px; }
.hero-split{
  display:grid;
  grid-template-columns: 1.05fr .95fr;
  gap: 28px;
  align-items:center;
}
.hero-copy .kicker{
  display:inline-block;
  font-size: 12px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: rgba(255,255,255,.7);
  padding: 6px 10px;
  border: 1px solid rgba(255,255,255,.14);
  border-radius: 999px;
  background: rgba(255,255,255,.04);
  margin-bottom: 12px;
}
.hero-media{
  border-radius: 18px;
  overflow:hidden;
  border: 1px solid rgba(255,255,255,.12);
  background: radial-gradient(1200px 400px at 10% 0%, rgba(0,231,255,.12), transparent 60%),
              radial-gradient(900px 400px at 90% 30%, rgba(255,77,157,.12), transparent 60%);
}
.hero-media img{ width:100%; height:auto; display:block; }

.feature-pills{
  display:flex;
  flex-wrap:wrap;
  gap: 10px;
  margin: 16px 0 18px;
}
.pill{
  display:inline-flex;
  align-items:center;
  gap: 8px;
  padding: 8px 12px;
  border-radius: 999px;
  border: 1px solid rgba(255,255,255,.12);
  background: rgba(255,255,255,.04);
  color: rgba(255,255,255,.86);
  font-size: 13px;
}

.mini-note{
  margin-top: 12px;
  font-size: 13px;
  color: rgba(255,255,255,.68);
}

.feature-card .feature-icon{
  width: 42px; height:42px;
  display:grid; place-items:center;
  border-radius: 12px;
  border: 1px solid rgba(255,255,255,.12);
  background: rgba(255,255,255,.04);
  margin-bottom: 10px;
  font-size: 18px;
}

.shot-grid{
  display:grid;
  grid-template-columns: repeat(3, minmax(0,1fr));
  gap: 16px;
}
.shot{
  margin:0;
  border-radius: 18px;
  overflow:hidden;
  border: 1px solid rgba(255,255,255,.10);
  background: rgba(255,255,255,.03);
}
.shot img{ width:100%; height:auto; display:block; }
.shot figcaption{
  padding: 10px 12px 12px;
  font-size: 13px;
  color: rgba(255,255,255,.72);
  border-top: 1px solid rgba(255,255,255,.08);
}

.software-wrap{
  display:grid;
  grid-template-columns: .9fr 1.1fr;
  gap: 16px;
  align-items:start;
}
.software-grid{
  display:grid;
  grid-template-columns: repeat(2, minmax(0,1fr));
  gap: 12px;
}
.software-grid img{
  width:100%;
  height:auto;
  display:block;
  border-radius: 14px;
  border: 1px solid rgba(255,255,255,.10);
  background: rgba(255,255,255,.02);
}

.checklist{
  padding-left: 18px;
  margin: 0;
}
.checklist li{ margin: 10px 0; color: rgba(255,255,255,.82); }
.checklist b{ color: rgba(255,255,255,.95); }

.specs{ padding: 16px; }
.spec-row{
  display:flex;
  justify-content: space-between;
  gap: 14px;
  padding: 10px 8px;
  border-bottom: 1px dashed rgba(255,255,255,.14);
}
.spec-row:last-child{ border-bottom: none; }
.spec-row span:first-child{ color: rgba(255,255,255,.65); }
.spec-row span:last-child{ color: rgba(255,255,255,.9); text-align:right; }

.cta-band{
  margin-top: 14px;
  display:flex;
  align-items:center;
  justify-content: space-between;
  gap: 14px;
}
.cta-actions{ display:flex; gap:10px; flex-wrap:wrap; }

.faq details > summary{
  cursor:pointer;
  font-weight: 700;
}
.faq details p{ margin: 10px 0 0; }

/* Responsive */
@media (max-width: 980px){
  .hero-split{ grid-template-columns: 1fr; }
  .shot-grid{ grid-template-columns: 1fr; }
  .software-wrap{ grid-template-columns: 1fr; }
  .software-grid{ grid-template-columns: 1fr; }
  .cta-band{ flex-direction: column; align-items: flex-start; }
}

/* ===== Download page tweaks ===== */
body[data-page="download"] .hero-split h1{
  margin: 0 0 10px;
  font-size: clamp(28px, 4vw, 44px);
}

body[data-page="download"] .hero-split .subtitle{
  max-width: none;
}

body[data-page="download"] .cta-band{
  margin-top: 14px;
  padding: 12px 14px;
  border: 1px solid rgba(255,255,255,.10);
  border-radius: 14px;
  background: rgba(255,255,255,.03);
}

body[data-page="download"] .cta-actions .btn.primary{
  min-width: 170px;
}

body[data-page="download"] .hero-media{
  box-shadow: 0 14px 40px rgba(0,0,0,.35);
}

body[data-page="download"] .hero-media img{
  aspect-ratio: 16 / 10;
  object-fit: cover;
}

/* 让 product 卡片的“媒体区”在下载页更像占位图而不是纯色 */
body[data-page="download"] .product .media{
  height: 140px;
  display: flex;
  align-items: flex-start;
  justify-content: flex-start;
}