/* ============================================================
   FaceAuthWX — 下载站
   ============================================================ */

:root{
  --ink:#1d1d1f;
  --ink-2:#6e6e73;
  --ink-3:#86868b;
  --bg:#fbfbfd;
  --bg-tint:#f5f5f7;
  --dark:#08090b;
  --dark-2:#111317;
  --blue:#0a84ff;
  --blue-deep:#0071e3;
  --ok:#30d158;
  --line:rgba(0,0,0,.08);
  --line-dark:rgba(255,255,255,.12);
  --r:18px;
  --ease:cubic-bezier(.22,1,.36,1);
  --wrap:1080px;
}

*,*::before,*::after{box-sizing:border-box}

html{
  -webkit-text-size-adjust:100%;
  scroll-behavior:smooth;
  scroll-padding-top:72px;
}

body{
  margin:0;
  background:var(--bg);
  color:var(--ink);
  font:400 16px/1.65 -apple-system,BlinkMacSystemFont,"SF Pro SC","PingFang SC",
       "Helvetica Neue","Microsoft YaHei",system-ui,sans-serif;
  letter-spacing:.002em;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}

img,svg{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
h1,h2,h3,p,ul,ol{margin:0}
ul,ol{padding:0;list-style:none}

.wrap{max-width:var(--wrap);margin:0 auto;padding:0 24px}
.wrap--narrow{max-width:760px}

/* ── 滚动进度条 ─────────────────────────────────────────── */
.progress{
  position:fixed;top:0;left:0;height:2px;width:0;z-index:100;
  background:linear-gradient(90deg,var(--blue),#5ac8fa);
  transition:width .1s linear;
}

/* ── 导航 ───────────────────────────────────────────────── */
.nav{
  position:fixed;top:0;left:0;right:0;z-index:90;
  color:#fff;
  transition:background .35s var(--ease),color .35s var(--ease),
             border-color .35s var(--ease),backdrop-filter .35s;
  border-bottom:1px solid transparent;
}
.nav__inner{
  max-width:var(--wrap);margin:0 auto;padding:0 24px;
  height:56px;display:flex;align-items:center;gap:28px;
}
.nav__brand{display:flex;align-items:center;gap:9px;font-weight:600;font-size:15px;letter-spacing:-.01em}
.nav__brand svg{color:var(--blue);border-radius:6px;flex:none}
.nav__links{display:flex;gap:26px;margin-left:auto;font-size:13.5px}
.nav__links a{opacity:.78;transition:opacity .2s}
.nav__links a:hover{opacity:1}
.nav__cta{
  font-size:13px;padding:6px 15px;border-radius:99px;
  background:var(--blue);color:#fff;font-weight:500;
  transition:transform .2s var(--ease),background .2s;
}
.nav__cta:hover{background:var(--blue-deep);transform:translateY(-1px)}

.nav.is-solid{
  color:var(--ink);
  background:rgba(251,251,253,.78);
  -webkit-backdrop-filter:saturate(180%) blur(20px);
  backdrop-filter:saturate(180%) blur(20px);
  border-bottom-color:var(--line);
}

@media(max-width:720px){
  .nav__links{display:none}
  .nav__cta{margin-left:auto}
}

/* ── HERO ───────────────────────────────────────────────── */
.hero{
  position:relative;
  background:var(--dark);
  color:#fff;
  padding:132px 0 0;
  overflow:hidden;
}
.hero__glow{
  position:absolute;inset:auto 0 0;
  height:560px;
  background:
    radial-gradient(60% 70% at 50% 100%,rgba(10,132,255,.30),transparent 70%),
    radial-gradient(40% 50% at 82% 88%,rgba(90,200,250,.16),transparent 70%);
  filter:blur(6px);
  pointer-events:none;
}
.hero__inner{position:relative;z-index:1;text-align:center}

.eyebrow{
  font-size:12.5px;font-weight:600;letter-spacing:.14em;
  text-transform:uppercase;color:var(--blue);
  margin-bottom:18px;
}
.sec__head--light .eyebrow{color:#5ac8fa}

.hero__title{
  font-size:clamp(38px,7.2vw,74px);
  line-height:1.08;
  font-weight:700;
  letter-spacing:-.03em;
  margin-bottom:26px;
}
.hero__title .dim{
  background:linear-gradient(180deg,#fff 34%,rgba(255,255,255,.52));
  -webkit-background-clip:text;background-clip:text;
  -webkit-text-fill-color:transparent;color:transparent;
}

.hero__lead{
  max-width:660px;margin:0 auto 36px;
  font-size:clamp(15.5px,2.2vw,19px);
  line-height:1.72;
  color:rgba(255,255,255,.66);
  letter-spacing:-.005em;
}

.hero__acts{
  display:flex;gap:14px;justify-content:center;flex-wrap:wrap;
  margin-bottom:22px;
}

.btn{
  display:inline-flex;flex-direction:column;align-items:center;justify-content:center;
  min-height:46px;padding:11px 26px;border-radius:99px;
  font-size:15px;font-weight:500;line-height:1.3;
  transition:transform .22s var(--ease),background .22s,box-shadow .22s,opacity .22s;
  cursor:pointer;
}
.btn__sub{font-size:11.5px;font-weight:400;opacity:.72;margin-top:1px;letter-spacing:.01em}
.btn--primary{
  background:var(--blue);color:#fff;
  box-shadow:0 8px 26px -10px rgba(10,132,255,.85);
}
.btn--primary:hover{background:var(--blue-deep);transform:translateY(-2px);box-shadow:0 14px 34px -12px rgba(10,132,255,.95)}
.btn--ghost{
  border:1px solid rgba(255,255,255,.28);color:#fff;
  background:rgba(255,255,255,.04);
}
.btn--ghost:hover{background:rgba(255,255,255,.1);transform:translateY(-2px)}
.btn--lg{min-height:58px;padding:15px 40px;font-size:16.5px}

.hero__meta{
  display:flex;gap:20px;justify-content:center;flex-wrap:wrap;
  font-size:13px;color:rgba(255,255,255,.5);
}
.hero__meta li{position:relative;padding-left:16px}
.hero__meta li::before{
  content:"";position:absolute;left:0;top:50%;width:5px;height:5px;
  margin-top:-2.5px;border-radius:50%;background:var(--ok);
}

/* ── 核验窗口模拟 ───────────────────────────────────────── */
.stage{
  margin-top:64px;padding-bottom:0;
  display:flex;justify-content:center;
}
.mock{
  position:relative;width:min(392px,100%);
  background:linear-gradient(180deg,#1a1d22,#101216);
  border:1px solid var(--line-dark);
  border-bottom:none;
  border-radius:20px 20px 0 0;
  box-shadow:0 -1px 0 rgba(255,255,255,.06) inset,0 40px 90px -30px rgba(0,0,0,.9);
  overflow:hidden;
}
.mock__scan{
  position:absolute;left:0;right:0;height:34%;
  background:linear-gradient(180deg,transparent,rgba(10,132,255,.16) 60%,rgba(10,132,255,.42));
  animation:scan 3.4s var(--ease) infinite;
  pointer-events:none;z-index:2;
}
@keyframes scan{
  0%{transform:translateY(-110%)}
  55%,100%{transform:translateY(320%)}
}
.mock__head{
  display:flex;align-items:center;gap:7px;
  padding:12px 16px;border-bottom:1px solid rgba(255,255,255,.07);
}
.mock__head .dot{width:9px;height:9px;border-radius:50%;background:rgba(255,255,255,.16)}
.mock__head em{
  margin-left:8px;font-style:normal;font-size:11.5px;
  color:rgba(255,255,255,.42);letter-spacing:.04em;
}
.mock__body{padding:34px 24px 30px;text-align:center}
.mock__ring{width:132px;height:132px;margin:0 auto 20px;position:relative}
.mock__ring svg{width:100%;height:100%;transform:rotate(-90deg)}
.ring__track{fill:none;stroke:rgba(255,255,255,.09);stroke-width:3}
.ring__arc{
  fill:none;stroke:var(--blue);stroke-width:3;stroke-linecap:round;
  stroke-dasharray:327;stroke-dashoffset:327;
  animation:ring 3.4s var(--ease) infinite;
}
@keyframes ring{
  0%{stroke-dashoffset:327}
  60%{stroke-dashoffset:90}
  100%{stroke-dashoffset:327}
}
.ring__face{
  transform:rotate(90deg);transform-origin:60px 60px;
  fill:none;stroke:rgba(255,255,255,.85);stroke-width:2.4;stroke-linecap:round;
}
.mock__title{font-size:17px;font-weight:600;letter-spacing:-.01em;margin-bottom:6px}
.mock__sub{font-size:13px;color:rgba(255,255,255,.45);margin-bottom:22px}
.mock__btn{
  display:inline-block;padding:10px 34px;border-radius:99px;
  background:var(--blue);font-size:14px;font-weight:500;
  box-shadow:0 8px 22px -10px rgba(10,132,255,.9);
}
.mock__foot{
  display:flex;gap:8px;padding:0 16px 18px;flex-wrap:wrap;
}
.chip{
  font-size:11.5px;padding:4px 11px;border-radius:6px;
  background:rgba(255,255,255,.07);color:rgba(255,255,255,.6);
}
.chip--ok{background:rgba(48,209,88,.16);color:#5cd97c}

/* ── 一句话 ─────────────────────────────────────────────── */
.statement{padding:104px 0;background:var(--bg)}
.statement__text{
  font-size:clamp(21px,3.4vw,33px);
  line-height:1.52;font-weight:500;letter-spacing:-.022em;
  text-align:center;color:var(--ink-2);
  max-width:900px;margin:0 auto;
}
.statement__text b{color:var(--ink);font-weight:600}

/* ── 通用区块 ───────────────────────────────────────────── */
.sec{padding:104px 0;background:var(--bg)}
.sec--tint{background:var(--bg-tint)}

.sec__head{max-width:660px;margin-bottom:58px}
.sec__head--light{color:#fff}
.sec__head--light .sec__lead{color:rgba(255,255,255,.6)}

.sec__title{
  font-size:clamp(29px,4.6vw,46px);
  line-height:1.14;font-weight:700;letter-spacing:-.028em;
  margin-bottom:16px;
}
.sec__lead{font-size:clamp(15.5px,2.2vw,18.5px);color:var(--ink-2);line-height:1.66}

/* ── 工作原理 ───────────────────────────────────────────── */
.how{display:grid;grid-template-columns:.82fr 1.18fr;gap:56px;align-items:start}
.how__sticky{position:sticky;top:96px}
.how__steps{display:flex;flex-direction:column;gap:2px;margin-bottom:26px}
.how__step{
  display:flex;align-items:center;gap:13px;
  padding:11px 15px;border-radius:11px;
  color:var(--ink-3);font-size:16px;
  transition:background .35s var(--ease),color .35s var(--ease);
}
.how__step i{
  font-style:normal;font-size:12px;font-weight:600;
  width:23px;height:23px;border-radius:50%;flex:none;
  display:grid;place-items:center;
  background:rgba(0,0,0,.06);color:var(--ink-3);
  transition:background .35s var(--ease),color .35s var(--ease);
}
.how__step.is-active{background:rgba(10,132,255,.09);color:var(--ink);font-weight:500}
.how__step.is-active i{background:var(--blue);color:#fff}
.how__note{
  font-size:13.5px;line-height:1.72;color:var(--ink-3);
  padding-left:15px;border-left:2px solid var(--line);
}

.how__panels{display:flex;flex-direction:column;gap:18px}
.panel{
  background:#fff;border:1px solid var(--line);border-radius:var(--r);
  padding:30px 32px;
  box-shadow:0 1px 2px rgba(0,0,0,.03);
  transition:box-shadow .4s var(--ease),transform .4s var(--ease);
}
.panel:hover{box-shadow:0 20px 50px -24px rgba(0,0,0,.22);transform:translateY(-2px)}
.panel__n{font-size:12px;font-weight:600;letter-spacing:.1em;color:var(--blue);margin-bottom:9px}
.panel h3{font-size:20.5px;font-weight:600;letter-spacing:-.018em;margin-bottom:9px}
.panel p{font-size:15px;color:var(--ink-2);line-height:1.72}

/* ── 卡片 ───────────────────────────────────────────────── */
.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.card{
  background:#fff;border:1px solid var(--line);border-radius:var(--r);
  padding:30px 28px;
  box-shadow:0 1px 2px rgba(0,0,0,.03);
  transition:transform .4s var(--ease),box-shadow .4s var(--ease);
}
.card:hover{transform:translateY(-3px);box-shadow:0 24px 54px -26px rgba(0,0,0,.24)}
.card h3{
  font-size:18px;font-weight:600;letter-spacing:-.016em;margin-bottom:11px;
  padding-top:15px;position:relative;
}
.card h3::before{
  content:"";position:absolute;top:0;left:0;width:24px;height:2px;
  border-radius:2px;background:var(--blue);
}
.card p{font-size:14.5px;color:var(--ink-2);line-height:1.72}

/* ── 数字 ───────────────────────────────────────────────── */
.stats{padding:78px 0;background:#fff;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.stats__grid{display:grid;grid-template-columns:repeat(4,1fr);gap:30px;text-align:center}
.stat b{
  display:block;font-size:clamp(32px,4.6vw,46px);font-weight:700;
  letter-spacing:-.035em;line-height:1.1;margin-bottom:8px;
}
.stat b em{font-style:normal;font-size:.44em;font-weight:600;margin-left:3px;color:var(--ink-2)}
.stat>span{font-size:13.5px;color:var(--ink-3);line-height:1.55;display:block}

/* ── 管理端 ─────────────────────────────────────────────── */
.admin{display:grid;grid-template-columns:1.1fr .9fr;gap:60px;align-items:center}
.admin__text p{font-size:15.5px;color:var(--ink-2);line-height:1.78;margin-bottom:14px}
.admin__text .sec__title{margin-bottom:18px}
.ticks{margin-top:24px;display:flex;flex-direction:column;gap:11px}
.ticks li{
  position:relative;padding-left:27px;font-size:14.5px;color:var(--ink-2);
}
.ticks li::before{
  content:"";position:absolute;left:0;top:7px;width:15px;height:9px;
  border-left:2px solid var(--blue);border-bottom:2px solid var(--blue);
  transform:rotate(-45deg);
}
.admin__tabs{
  display:grid;grid-template-columns:1fr 1fr;gap:12px;
}
.admin__tabs span{
  background:#fff;border:1px solid var(--line);border-radius:13px;
  padding:19px 20px;font-size:15px;font-weight:500;letter-spacing:-.01em;
  box-shadow:0 1px 2px rgba(0,0,0,.03);
  transition:transform .4s var(--ease),box-shadow .4s var(--ease),border-color .4s;
}
.admin__tabs span:hover{
  transform:translateY(-3px);border-color:rgba(10,132,255,.35);
  box-shadow:0 18px 40px -20px rgba(10,132,255,.5);
}

/* ── 下载 ───────────────────────────────────────────────── */
.dl{
  position:relative;padding:104px 0;
  background:var(--dark);color:#fff;
  overflow:hidden;
}
.dl__glow{
  position:absolute;inset:-30% -10% auto;
  height:820px;
  background:radial-gradient(48% 48% at 50% 34%,rgba(10,132,255,.24),transparent 72%);
  pointer-events:none;
}

.dlbox{
  position:relative;
  display:grid;grid-template-columns:1.05fr .95fr;gap:44px;align-items:center;
  background:linear-gradient(180deg,rgba(255,255,255,.07),rgba(255,255,255,.03));
  border:1px solid var(--line-dark);
  border-radius:24px;padding:40px 42px;
  -webkit-backdrop-filter:blur(20px);backdrop-filter:blur(20px);
}
.dlbox__name{
  font-size:22px;font-weight:600;letter-spacing:-.018em;margin-bottom:20px;
  word-break:break-all;
}
.dlbox__spec{display:grid;grid-template-columns:1fr 1fr;gap:14px 20px}
.dlbox__spec li{font-size:13.5px}
.dlbox__spec span{display:block;color:rgba(255,255,255,.44);margin-bottom:3px;font-size:12px;letter-spacing:.03em}
.dlbox__spec b{font-weight:500;font-size:14px}

.dlbox__act{text-align:center}
.dlbox__act .btn{width:100%}
.dlbox__hint{
  font-size:12.5px;color:rgba(255,255,255,.5);margin-top:15px;line-height:1.65;
}
.dlbox__hash{
  font-size:11.5px;color:rgba(255,255,255,.34);margin-top:9px;
  font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  word-break:break-all;
}

.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-top:46px}
.step{
  padding:30px 26px;border-radius:var(--r);
  background:rgba(255,255,255,.045);
  border:1px solid rgba(255,255,255,.09);
  transition:background .4s var(--ease),transform .4s var(--ease);
}
.step:hover{background:rgba(255,255,255,.075);transform:translateY(-3px)}
.step i{
  font-style:normal;display:grid;place-items:center;
  width:29px;height:29px;border-radius:50%;margin-bottom:16px;
  background:var(--blue);font-size:13.5px;font-weight:600;
}
.step h3{font-size:17px;font-weight:600;letter-spacing:-.014em;margin-bottom:10px}
.step p{font-size:13.5px;color:rgba(255,255,255,.62);line-height:1.72}

.dl__foot{
  margin-top:44px;padding-top:26px;
  border-top:1px solid var(--line-dark);
  display:grid;grid-template-columns:1fr 1fr;gap:20px;
  font-size:13.5px;color:rgba(255,255,255,.58);line-height:1.75;
}
.dl__foot b{color:#fff;font-weight:600}

/* ── FAQ ────────────────────────────────────────────────── */
.faq{display:flex;flex-direction:column}
.faq details{border-bottom:1px solid var(--line)}
.faq details:first-child{border-top:1px solid var(--line)}
.faq summary{
  padding:22px 40px 22px 0;font-size:16.5px;font-weight:500;
  letter-spacing:-.012em;cursor:pointer;position:relative;list-style:none;
}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{
  content:"";position:absolute;right:8px;top:50%;
  width:9px;height:9px;margin-top:-6px;
  border-right:1.8px solid var(--ink-3);border-bottom:1.8px solid var(--ink-3);
  transform:rotate(45deg);transition:transform .3s var(--ease);
}
.faq details[open] summary::after{transform:rotate(-135deg);margin-top:-2px}
.faq details p{
  padding:0 40px 24px 0;font-size:14.5px;color:var(--ink-2);line-height:1.78;
}

/* ── 页脚 ───────────────────────────────────────────────── */
.foot{background:var(--bg-tint);border-top:1px solid var(--line);padding:44px 0}
.foot__inner{display:flex;justify-content:space-between;align-items:center;gap:24px;flex-wrap:wrap}
.foot__brand{font-weight:600;font-size:15px;letter-spacing:-.01em}
.foot__desc{font-size:13px;color:var(--ink-3);margin-top:3px}
.foot__note{font-size:12.5px;color:var(--ink-3)}

/* ── 滚动渐显 ───────────────────────────────────────────── */
.reveal{
  opacity:0;transform:translateY(30px);
  transition:opacity .95s var(--ease),transform .95s var(--ease);
  will-change:opacity,transform;
}
.reveal.in{opacity:1;transform:none}
.reveal[data-delay="1"]{transition-delay:.09s}
.reveal[data-delay="2"]{transition-delay:.18s}
.reveal[data-delay="3"]{transition-delay:.27s}
.reveal[data-delay="4"]{transition-delay:.36s}
.reveal[data-delay="5"]{transition-delay:.46s}

/* ── 响应式 ─────────────────────────────────────────────── */
@media(max-width:900px){
  .cards{grid-template-columns:1fr 1fr}
  .stats__grid{grid-template-columns:1fr 1fr;gap:34px}
  .admin{grid-template-columns:1fr;gap:40px}
  .how{grid-template-columns:1fr;gap:34px}
  .how__sticky{position:static}
  .how__note{display:none}
  .dlbox{grid-template-columns:1fr;gap:30px;padding:32px 26px}
  .steps{grid-template-columns:1fr}
  .dl__foot{grid-template-columns:1fr}
  .sec,.dl{padding:76px 0}
  .statement{padding:72px 0}
}

@media(max-width:560px){
  body{font-size:15.5px}
  .wrap{padding:0 20px}
  .cards{grid-template-columns:1fr}
  .hero{padding-top:104px}
  .hero__acts .btn{width:100%}
  .stage{margin-top:48px}
  .mock__body{padding:26px 20px 24px}
  .mock__ring{width:112px;height:112px}
  .admin__tabs{grid-template-columns:1fr}
  .faq summary{padding-right:34px;font-size:15.5px}
  .btn--lg{padding:14px 24px;font-size:15.5px}
}

/* ── 无障碍 ─────────────────────────────────────────────── */
@media(prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation-duration:.001ms!important;animation-iteration-count:1!important;
    transition-duration:.001ms!important}
  .reveal{opacity:1;transform:none}
}