/* =========================================================
   Aiden 指纹浏览器 · 官网样式
   配色沿用客户端主题：科技蓝 #2563EB + 金色点缀 #BE8F3A
   ========================================================= */

:root{
  --brand:#2563EB;
  --brand-deep:#1B4FC8;
  --brand-light:#3A80F0;
  --brand-ink:#0F2A63;
  --gold:#BE8F3A;
  --gold-soft:#FBF3E3;

  --ink:#1B2436;
  --ink-2:#39455C;
  --muted:#788498;
  --line:#E6EEFB;
  --line-2:#D8E4F8;

  --bg:#FFFFFF;
  --bg-tint:#F5F8FF;
  --bg-deep:#0E1F45;

  --radius:16px;
  --radius-lg:22px;
  --shadow-sm:0 2px 10px rgba(31,64,140,.06);
  --shadow:0 12px 32px rgba(31,64,140,.10);
  --shadow-lg:0 24px 60px rgba(23,52,120,.16);
  --max:1200px;
}

*{box-sizing:border-box;}
html{scroll-behavior:smooth;scroll-padding-top:88px;}
body{
  margin:0;
  font-family:"PingFang SC","Microsoft YaHei","Hiragino Sans GB","Segoe UI",system-ui,-apple-system,sans-serif;
  color:var(--ink);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
  line-height:1.65;
  font-size:15px;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
ul,ol{margin:0;padding:0;list-style:none;}
/* 吸顶导航锚点跳转时给目标区块留出高度，避免标题被盖住 */
[id]{scroll-margin-top:88px;}
h1,h2,h3,h4,h5{margin:0;line-height:1.28;font-weight:800;letter-spacing:-.01em;}
p{margin:0;}
code{
  font-family:ui-monospace,SFMono-Regular,Consolas,"Courier New",monospace;
  font-size:.9em;
  background:#F1F6FF;
  border:1px solid var(--line-2);
  border-radius:6px;
  padding:1px 6px;
  color:var(--brand-deep);
  word-break:normal;
  overflow-wrap:anywhere;
}
.ico{width:18px;height:18px;fill:currentColor;flex:0 0 auto;}

.container{width:100%;max-width:var(--max);margin:0 auto;padding:0 24px;}

/* ================= 按钮 ================= */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  border:1px solid transparent;border-radius:999px;
  padding:11px 22px;font-size:14.5px;font-weight:700;
  cursor:pointer;transition:.22s ease;white-space:nowrap;
  font-family:inherit;
}
.btn-lg{padding:14px 30px;font-size:15.5px;}
.btn-xl{padding:17px 34px;font-size:16.5px;}
.btn-primary{
  background:linear-gradient(135deg,var(--brand) 0%,var(--brand-light) 100%);
  color:#fff;box-shadow:0 10px 24px rgba(37,99,235,.28);
}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 16px 34px rgba(37,99,235,.34);}
.btn-outline{
  background:#fff;color:var(--brand);border-color:var(--line-2);
}
.btn-outline:hover{border-color:var(--brand);background:#F7FAFF;transform:translateY(-2px);}
.btn-ghost{background:transparent;color:var(--ink-2);font-weight:600;}
.btn-ghost:hover{color:var(--brand);}
.btn-white{background:#fff;color:var(--brand-deep);box-shadow:0 12px 28px rgba(0,0,0,.16);}
.btn-white:hover{transform:translateY(-2px);}

/* ================= 导航 ================= */
.nav{
  position:fixed;top:0;left:0;right:0;z-index:60;
  background:rgba(255,255,255,.82);
  backdrop-filter:saturate(160%) blur(14px);
  -webkit-backdrop-filter:saturate(160%) blur(14px);
  border-bottom:1px solid transparent;
  transition:.25s ease;
}
.nav.is-stuck{border-bottom-color:var(--line);box-shadow:0 6px 22px rgba(31,64,140,.07);}
.nav-inner{display:flex;align-items:center;gap:28px;height:68px;}
.brand{display:flex;align-items:center;gap:10px;}
.brand-logo{width:34px;height:34px;border-radius:9px;object-fit:contain;}
.brand-text{display:flex;flex-direction:column;line-height:1.15;}
.brand-text b{font-size:17px;letter-spacing:.01em;color:var(--brand-ink);}
.brand-text i{font-style:normal;font-size:11px;color:var(--muted);letter-spacing:.04em;}

.nav-links{display:flex;gap:26px;margin-left:auto;}
.nav-links a{
  font-size:14.5px;font-weight:600;color:var(--ink-2);
  position:relative;padding:4px 0;transition:.2s;
}
.nav-links a::after{
  content:"";position:absolute;left:0;right:100%;bottom:0;height:2px;
  background:var(--brand);border-radius:2px;transition:right .24s ease;
}
.nav-links a:hover{color:var(--brand);}
.nav-links a:hover::after{right:0;}
.nav-actions{display:flex;align-items:center;gap:8px;}
.nav-burger{display:none;background:none;border:0;padding:8px;cursor:pointer;}
.nav-burger span{display:block;width:20px;height:2px;background:var(--ink);border-radius:2px;margin:4px 0;}

/* ================= 首屏 ================= */
.hero{position:relative;padding:130px 0 0;overflow:hidden;}
.hero-bg{position:absolute;inset:0;pointer-events:none;}
.hero-bg .blob{position:absolute;border-radius:50%;filter:blur(70px);opacity:.5;}
.blob-a{width:620px;height:620px;left:-160px;top:-220px;
  background:radial-gradient(circle at 30% 30%,rgba(58,128,240,.55),transparent 68%);}
.blob-b{width:560px;height:560px;right:-140px;top:-120px;
  background:radial-gradient(circle at 60% 40%,rgba(190,143,58,.30),transparent 66%);}
.grid-mask{
  position:absolute;inset:0;
  background-image:linear-gradient(rgba(37,99,235,.05) 1px,transparent 1px),
                   linear-gradient(90deg,rgba(37,99,235,.05) 1px,transparent 1px);
  background-size:56px 56px;
  mask-image:linear-gradient(180deg,#000 0%,transparent 72%);
  -webkit-mask-image:linear-gradient(180deg,#000 0%,transparent 72%);
}
.hero-inner{
  position:relative;display:grid;grid-template-columns:1.02fr 1.08fr;
  gap:54px;align-items:center;
}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  background:#fff;border:1px solid var(--line-2);border-radius:999px;
  padding:7px 16px;font-size:13.5px;font-weight:600;color:var(--brand-deep);
  box-shadow:var(--shadow-sm);
}
.eyebrow .dot{width:7px;height:7px;border-radius:50%;background:var(--gold);
  box-shadow:0 0 0 4px rgba(190,143,58,.18);}
.hero h1{font-size:52px;margin:22px 0 18px;color:var(--brand-ink);}
.hero .lead{font-size:16.5px;color:var(--ink-2);max-width:540px;}
.hero-cta{display:flex;gap:14px;margin:30px 0 22px;flex-wrap:wrap;}
.hero-meta{display:flex;gap:22px;flex-wrap:wrap;font-size:13.5px;color:var(--muted);}
.hero-meta b{color:var(--ink-2);}

.hero-visual{position:relative;}
.device{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);
  box-shadow:var(--shadow-lg);overflow:hidden;transform:perspective(1400px) rotateY(-6deg) rotateX(2deg);
  transition:transform .5s ease;
}
.hero-visual:hover .device{transform:perspective(1400px) rotateY(-2deg) rotateX(0deg);}
.device-bar{
  display:flex;align-items:center;gap:7px;padding:11px 16px;
  background:linear-gradient(90deg,#F7FAFF,#EEF5FF);border-bottom:1px solid var(--line);
}
.device-bar .dd{width:10px;height:10px;border-radius:50%;background:#D6E2F7;}
.device-bar em{font-style:normal;font-size:12px;color:var(--muted);margin-left:8px;letter-spacing:.02em;}

.float-card{
  position:absolute;display:flex;align-items:center;gap:11px;
  background:#fff;border:1px solid var(--line);border-radius:14px;
  padding:12px 16px;box-shadow:var(--shadow);
  animation:floaty 5.5s ease-in-out infinite;
}
.float-card b{display:block;font-size:13.5px;color:var(--brand-ink);}
.float-card i{font-style:normal;font-size:11.5px;color:var(--muted);}
.fc-ico{width:34px;height:34px;border-radius:10px;display:grid;place-items:center;}
.fc-ico svg{width:19px;height:19px;fill:#fff;}
.fc-ico.blue{background:linear-gradient(135deg,var(--brand),var(--brand-light));}
.fc-ico.gold{background:linear-gradient(135deg,#D8A44B,var(--gold));}
.fc-1{left:-34px;bottom:74px;animation-delay:.4s;}
.fc-2{right:-18px;top:44px;}
@keyframes floaty{0%,100%{transform:translateY(0)}50%{transform:translateY(-9px)}}

.stats{
  position:relative;display:grid;grid-template-columns:repeat(4,1fr);
  gap:18px;margin:64px 0 0;padding:26px 30px;
  background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);
  box-shadow:var(--shadow);
}
.stats li{text-align:center;border-right:1px solid var(--line);}
.stats li:last-child{border-right:0;}
.stats b{display:block;font-size:22px;color:var(--brand);letter-spacing:-.01em;}
.stats i{font-style:normal;font-size:13px;color:var(--muted);}

/* ================= 通用区块 ================= */
.section{padding:96px 0;}
.section-tint{background:var(--bg-tint);}
.sec-head{text-align:center;max-width:760px;margin:0 auto 48px;}
.sec-head h2{font-size:36px;color:var(--brand-ink);}
.sec-head h2 span{color:var(--brand);}
.sec-head p{margin-top:14px;color:var(--muted);font-size:16px;}

/* ================= 功能卡片 ================= */
.cards-4{display:grid;grid-template-columns:repeat(4,1fr);gap:22px;}
.card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:28px 24px;box-shadow:var(--shadow-sm);
  transition:.26s ease;position:relative;overflow:hidden;
}
.card::before{
  content:"";position:absolute;left:0;right:0;top:0;height:3px;
  background:linear-gradient(90deg,var(--brand),var(--brand-light));
  transform:scaleX(0);transform-origin:left;transition:transform .3s ease;
}
.card:hover{transform:translateY(-6px);box-shadow:var(--shadow);border-color:var(--line-2);}
.card:hover::before{transform:scaleX(1);}
.card-ico{
  width:50px;height:50px;border-radius:14px;display:grid;place-items:center;
  background:linear-gradient(135deg,#E8F0FF,#DCE9FF);margin-bottom:18px;
}
.card-ico svg{width:25px;height:25px;fill:var(--brand);}
.card h3{font-size:17.5px;margin-bottom:10px;color:var(--brand-ink);}
.card p{font-size:14px;color:var(--ink-2);}
.ticks{margin-top:16px;display:grid;gap:8px;}
.ticks li{position:relative;padding-left:20px;font-size:13.5px;color:var(--muted);}
.ticks li::before{
  content:"";position:absolute;left:2px;top:8px;width:8px;height:8px;border-radius:3px;
  background:linear-gradient(135deg,var(--brand),var(--brand-light));
}

/* ================= 能力矩阵 ================= */
.matrix{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;}
.m-item{
  background:#fff;border:1px solid var(--line);border-radius:14px;padding:20px;
  transition:.24s ease;
}
.m-item:hover{border-color:var(--brand-light);box-shadow:var(--shadow);transform:translateY(-3px);}
.m-item b{display:block;font-size:15px;color:var(--brand-ink);margin-bottom:6px;}
.m-item i{font-style:normal;font-size:13px;color:var(--muted);line-height:1.6;}

/* ================= 截图 ================= */
.shots{background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);
  padding:22px;box-shadow:var(--shadow);}
.shot-tabs{display:flex;gap:10px;justify-content:center;margin-bottom:20px;flex-wrap:wrap;}
.shot-tab{
  font-family:inherit;font-size:14px;font-weight:700;color:var(--ink-2);
  background:#F4F8FF;border:1px solid var(--line);border-radius:999px;
  padding:9px 20px;cursor:pointer;transition:.2s;
}
.shot-tab:hover{color:var(--brand);}
.shot-tab.is-on{background:linear-gradient(135deg,var(--brand),var(--brand-light));color:#fff;border-color:transparent;
  box-shadow:0 8px 18px rgba(37,99,235,.26);}
.shot-stage{position:relative;border-radius:14px;overflow:hidden;border:1px solid var(--line);}
.shot-img{display:none;}
.shot-img.is-on{display:block;animation:fade .35s ease;}
@keyframes fade{from{opacity:0;transform:translateY(6px)}to{opacity:1;transform:none}}

/* ================= 场景 ================= */
.scenes{display:grid;grid-template-columns:repeat(4,1fr);gap:22px;}
.scene{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:26px 22px;position:relative;transition:.24s ease;
}
.scene:hover{transform:translateY(-5px);box-shadow:var(--shadow);}
.s-num{
  font-size:13px;font-weight:800;color:var(--gold);
  background:var(--gold-soft);border-radius:8px;padding:3px 10px;display:inline-block;
}
.scene h4{font-size:16.5px;margin:14px 0 8px;color:var(--brand-ink);}
.scene p{font-size:13.5px;color:var(--muted);}

/* ================= 流程 ================= */
.flow{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;counter-reset:s;}
.step{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:30px 26px;position:relative;transition:.24s;
}
.step:hover{box-shadow:var(--shadow);transform:translateY(-4px);}
.step-no{
  display:grid;place-items:center;width:44px;height:44px;border-radius:14px;
  background:linear-gradient(135deg,var(--brand),var(--brand-light));
  color:#fff;font-weight:800;font-size:19px;margin-bottom:18px;
  box-shadow:0 10px 22px rgba(37,99,235,.24);
}
.step h4{font-size:17px;margin-bottom:10px;color:var(--brand-ink);}
.step p{font-size:14px;color:var(--ink-2);}

.notice{
  display:flex;gap:14px;align-items:flex-start;margin-top:26px;
  background:var(--gold-soft);border:1px solid #F0DEBB;border-radius:14px;
  padding:18px 22px;
}
.notice b{color:#8A6420;font-size:14px;flex:0 0 auto;}
.notice span{font-size:14px;color:#7A6234;}

/* ================= 下载区 ================= */
.download-sec{
  background:
    radial-gradient(900px 420px at 8% 0%,rgba(58,128,240,.14),transparent 62%),
    radial-gradient(700px 420px at 96% 100%,rgba(190,143,58,.16),transparent 60%),
    var(--bg-tint);
}
.dl-box{
  /* minmax(0,1fr) 而不是 1fr：grid 的 1fr 下限是 auto，
     里面 auto-fit 的 dl-meta 会把「一行塞下 5 项」的 min-content 宽度顶出来，
     窄屏下整块会被撑到 1000px 以上导致横向滚动 */
  display:grid;grid-template-columns:minmax(0,1fr);
  background:#fff;border:1px solid var(--line);border-radius:24px;
  padding:52px 48px;box-shadow:var(--shadow-lg);
}
.dl-left{min-width:0;}
.dl-left h2{font-size:33px;color:var(--brand-ink);}
.dl-left > p{margin-top:14px;color:var(--muted);font-size:15.5px;max-width:660px;}
.dl-actions{display:flex;gap:14px;margin:30px 0 32px;flex-wrap:wrap;}
.dl-meta{
  display:grid;grid-template-columns:repeat(auto-fit,minmax(186px,1fr));
  gap:14px 26px;max-width:1060px;
}
.dl-meta li{display:flex;gap:10px;font-size:13.5px;border-bottom:1px dashed var(--line);
  padding-bottom:9px;}
.dl-meta span{color:var(--muted);min-width:64px;}
.dl-meta b{color:var(--ink-2);font-weight:700;}

/* ================= FAQ ================= */
.faq{max-width:900px;margin:0 auto;display:grid;gap:12px;}
.qa{background:#fff;border:1px solid var(--line);border-radius:14px;overflow:hidden;
  transition:.22s;}
.qa[open]{box-shadow:var(--shadow);border-color:var(--line-2);}
.qa summary{
  cursor:pointer;list-style:none;padding:19px 24px;font-weight:700;font-size:15.5px;
  color:var(--brand-ink);display:flex;align-items:center;justify-content:space-between;gap:16px;
}
.qa summary::-webkit-details-marker{display:none;}
.qa summary::after{
  content:"";width:9px;height:9px;border-right:2px solid var(--brand);
  border-bottom:2px solid var(--brand);transform:rotate(45deg);transition:.24s;flex:0 0 auto;
  margin-top:-4px;
}
.qa[open] summary::after{transform:rotate(225deg);margin-top:4px;}
.qa-body{padding:0 24px 20px;font-size:14.5px;color:var(--ink-2);}
.qa-body p{max-width:820px;}

/* ================= 底部 CTA ================= */
.cta-final{
  background:linear-gradient(120deg,var(--brand-deep) 0%,var(--brand) 52%,var(--brand-light) 100%);
  padding:66px 0;color:#fff;position:relative;overflow:hidden;
}
.cta-final::after{
  content:"";position:absolute;width:520px;height:520px;border-radius:50%;
  right:-120px;top:-190px;background:radial-gradient(circle,rgba(255,255,255,.16),transparent 66%);
}
.cta-inner{display:flex;align-items:center;justify-content:space-between;gap:30px;
  position:relative;flex-wrap:wrap;}
.cta-inner h2{font-size:31px;color:#fff;}
.cta-inner p{margin-top:10px;color:rgba(255,255,255,.86);font-size:15.5px;}

/* ================= 页脚 ================= */
.foot{background:#0C1937;color:#A9B8D8;padding:58px 0 26px;font-size:13.5px;}
.foot-inner{display:grid;grid-template-columns:1fr 1.4fr;gap:40px;}
.foot-brand{display:flex;gap:14px;align-items:flex-start;}
.foot-brand img{width:40px;height:40px;border-radius:11px;
  background:#fff;padding:4px;object-fit:contain;}
.foot-brand b{display:block;color:#fff;font-size:16px;}
.foot-brand i{font-style:normal;font-size:12px;color:#7E90B5;}
.foot-cols{display:grid;grid-template-columns:repeat(3,1fr);gap:26px;}
.foot-cols h5{color:#fff;font-size:13.5px;margin-bottom:14px;letter-spacing:.03em;}
.foot-cols a,.foot-static{display:block;margin-bottom:9px;color:#9DAECF;transition:.2s;}
.foot-cols a:hover{color:#fff;}
.foot-bottom{
  display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap;
  margin-top:40px;padding-top:20px;border-top:1px solid rgba(255,255,255,.10);
  color:#7E90B5;font-size:12.5px;
}

/* ================= Toast ================= */
.toast{
  position:fixed;left:50%;bottom:40px;transform:translate(-50%,20px);
  background:var(--brand-ink);color:#fff;padding:13px 24px;border-radius:999px;
  font-size:14px;font-weight:600;box-shadow:var(--shadow-lg);
  opacity:0;pointer-events:none;transition:.28s ease;z-index:99;
}
.toast.is-on{opacity:1;transform:translate(-50%,0);}

/* ================= 滚动出现 ================= */
.reveal{opacity:0;transform:translateY(22px);transition:opacity .6s ease,transform .6s ease;}
.reveal.is-in{opacity:1;transform:none;}
@media (prefers-reduced-motion:reduce){
  .reveal{opacity:1;transform:none;transition:none;}
  .float-card{animation:none;}
  html{scroll-behavior:auto;}
}

/* ================= 响应式 ================= */
@media (max-width:1080px){
  .hero h1{font-size:42px;}
  .cards-4,.matrix,.scenes{grid-template-columns:repeat(2,1fr);}
  .dl-box{padding:32px;}
  .foot-inner{grid-template-columns:1fr;}
}
@media (max-width:860px){
  .nav-links{
    position:fixed;top:68px;left:0;right:0;background:#fff;
    flex-direction:column;gap:0;padding:8px 24px 18px;margin:0;
    border-bottom:1px solid var(--line);box-shadow:var(--shadow);
    transform:translateY(-140%);transition:transform .3s ease;
  }
  .nav-links.is-open{transform:none;}
  .nav-links a{padding:13px 0;border-bottom:1px solid var(--line);}
  .nav-burger{display:block;}
  .nav-actions .btn-ghost{display:none;}
  .hero{padding-top:104px;}
  .hero-inner{grid-template-columns:1fr;gap:40px;}
  .hero h1{font-size:34px;}
  .device{transform:none;}
  .float-card{display:none;}
  .stats{grid-template-columns:1fr 1fr;padding:22px;margin-top:44px;}
  .stats li{border-right:0;border-bottom:1px solid var(--line);padding-bottom:12px;}
  .stats li:nth-child(3),.stats li:nth-child(4){border-bottom:0;padding-bottom:0;}
  .section{padding:68px 0;}
  .sec-head h2{font-size:27px;}
  .flow{grid-template-columns:1fr;}
  .cta-inner h2{font-size:24px;}
}
@media (max-width:560px){
  .cards-4,.matrix,.scenes{grid-template-columns:1fr;}
  .dl-box{padding:24px;}
  .dl-left h2{font-size:24px;}
  .btn-xl{padding:15px 24px;font-size:15px;width:100%;}
  .dl-actions{gap:10px;}
}