/* =========================================================
   玄境全息 XUANJING HOLO
   设计系统：Apple 式极简 · 曜石黑 / 纯白 / 浅灰
   ========================================================= */

/* ---------- Tokens ---------- */
:root{
  --black:#08090C;
  --black-soft:#101114;
  --white:#FFFFFF;
  --gray:#F5F5F7;
  --gray-2:#EBEBEF;
  --ink:#1D1D1F;
  --ink-2:#424245;
  --muted:#86868B;
  --blue:#0071E3;
  --blue-hover:#0077ED;
  --blue-dark:#2997FF;

  --line:rgba(0,0,0,.10);
  --line-strong:rgba(0,0,0,.16);
  --line-d:rgba(255,255,255,.14);
  --line-d-soft:rgba(255,255,255,.08);

  --r-xs:8px;
  --r-sm:12px;
  --r-md:18px;
  --r-lg:28px;
  --r-pill:980px;

  --nav-h:48px;
  --maxw:1120px;
  --pad:clamp(20px,5vw,40px);

  --font:-apple-system,BlinkMacSystemFont,"SF Pro Display","SF Pro SC","PingFang SC",
         "HarmonyOS Sans SC","Microsoft YaHei","Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  --ease:cubic-bezier(.4,0,.2,1);
}

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

html{
  -webkit-text-size-adjust:100%;
  scroll-behavior:smooth;
  scroll-padding-top:calc(var(--nav-h) + 24px);
}

body{
  margin:0;
  background:var(--black);
  color:var(--ink);
  font-family:var(--font);
  font-size:17px;
  line-height:1.6;
  letter-spacing:-.01em;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
  overflow-x:hidden;
}

img{display:block;max-width:100%;height:auto}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;border:0;background:none;cursor:pointer}
::selection{background:rgba(0,113,227,.22)}

:focus-visible{
  outline:2px solid var(--blue);
  outline-offset:3px;
  border-radius:4px;
}
.sec--dark :focus-visible{outline-color:var(--blue-dark)}

/* ---------- 排版 ---------- */
h1,h2,h3,h4{margin:0;font-weight:600;letter-spacing:-.022em;line-height:1.08}
h1{font-size:clamp(38px,6.2vw,80px);letter-spacing:-.028em}
h2{font-size:clamp(28px,4vw,52px)}
h3{font-size:clamp(21px,2.4vw,30px);line-height:1.2}
h4{font-size:19px;line-height:1.3}

p{margin:0;text-wrap:pretty}
p + p{margin-top:1em}

.lead{
  font-size:clamp(17px,1.55vw,21px);
  line-height:1.5;
  color:var(--muted);
  letter-spacing:-.012em;
  max-width:660px;
}
.sec--dark .lead{color:#A1A1A6}

.kicker{
  display:block;
  font-size:13px;
  font-weight:600;
  letter-spacing:.01em;
  color:var(--blue);
  margin-bottom:14px;
}
.sec--dark .kicker{color:var(--blue-dark)}
.kicker--muted{color:var(--muted)}
.sec--dark .kicker--muted{color:var(--muted)}

/* ---------- 布局 ---------- */
.wrap{
  width:100%;
  max-width:var(--maxw);
  margin-inline:auto;
  padding-inline:var(--pad);
}

.sec{
  position:relative;
  padding-block:clamp(72px,10vw,140px);
}
.sec--tight{padding-block:clamp(48px,6vw,80px)}
.sec--dark{background:var(--black);color:#F5F5F7}
.sec--light{background:var(--white);color:var(--ink)}
.sec--gray{background:var(--gray);color:var(--ink)}

.sec__head{max-width:720px;margin-bottom:clamp(36px,5vw,64px)}
.sec__head--center{margin-inline:auto;text-align:center}

.split{
  display:grid;
  grid-template-columns:minmax(0,1fr) minmax(0,1fr);
  gap:clamp(32px,6vw,96px);
  align-items:center;
}
@media (max-width:860px){
  .split{grid-template-columns:1fr;gap:36px}
}

.grid-2{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:clamp(14px,2vw,24px)}
.grid-3{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:clamp(14px,2vw,24px)}
.grid-4{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:clamp(12px,1.6vw,20px)}
@media (max-width:900px){.grid-3,.grid-4{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media (max-width:600px){.grid-2,.grid-3,.grid-4{grid-template-columns:1fr}}

/* ---------- 按钮与链接 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  height:44px;
  padding:0 22px;
  border-radius:var(--r-pill);
  font-size:15px;
  font-weight:500;
  letter-spacing:-.01em;
  white-space:nowrap;
  transition:background-color .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease),transform .15s var(--ease);
}
.btn:active{transform:scale(.975)}
.btn--primary{background:var(--blue);color:#fff}
.btn--primary:hover{background:var(--blue-hover)}
.btn--ghost{border:1px solid var(--line-strong);color:var(--ink)}
.btn--ghost:hover{border-color:var(--ink-2);background:rgba(0,0,0,.03)}
.sec--dark .btn--ghost,
.hero .btn--ghost,
.page-hero .btn--ghost{border-color:var(--line-d);color:#F5F5F7}
.sec--dark .btn--ghost:hover,
.hero .btn--ghost:hover,
.page-hero .btn--ghost:hover{border-color:rgba(255,255,255,.4);background:rgba(255,255,255,.06)}
.btn--sm{height:34px;padding:0 16px;font-size:13.5px}

.link{
  display:inline-flex;
  align-items:center;
  gap:4px;
  font-size:17px;
  color:var(--blue);
  transition:color .2s var(--ease);
}
.link::after{content:"›";font-size:1.15em;line-height:1;transition:transform .2s var(--ease)}
.link:hover::after{transform:translateX(3px)}
.sec--dark .link{color:var(--blue-dark)}

.actions{display:flex;flex-wrap:wrap;gap:12px;align-items:center}
.actions--center{justify-content:center}

/* ---------- 导航 ---------- */
.nav{
  position:fixed;
  top:0;left:0;right:0;
  height:var(--nav-h);
  z-index:100;
  display:flex;
  align-items:center;
  background:rgba(8,9,12,.72);
  backdrop-filter:saturate(180%) blur(20px);
  -webkit-backdrop-filter:saturate(180%) blur(20px);
  border-bottom:1px solid transparent;
  transition:background-color .3s var(--ease),border-color .3s var(--ease);
}
.nav.is-scrolled{
  background:rgba(8,9,12,.88);
  border-bottom-color:var(--line-d-soft);
}
.nav__inner{
  width:100%;
  max-width:var(--maxw);
  margin-inline:auto;
  padding-inline:var(--pad);
  display:flex;
  align-items:center;
  gap:32px;
}
.brand{
  display:inline-flex;
  align-items:center;
  gap:8px;
  color:#F5F5F7;
  font-size:15px;
  font-weight:600;
  letter-spacing:-.01em;
  flex-shrink:0;
}
.brand svg{width:20px;height:20px;flex-shrink:0;opacity:.95}

.nav__links{
  display:flex;
  align-items:center;
  gap:26px;
  margin-left:auto;
}
.nav__link{
  font-size:12.5px;
  font-weight:400;
  color:rgba(245,245,247,.78);
  transition:color .2s var(--ease);
  white-space:nowrap;
}
.nav__link:hover{color:#fff}
.nav__link[aria-current="page"]{color:#fff}
.nav__cta{
  display:inline-flex;
  align-items:center;
  height:30px;
  padding:0 14px;
  border-radius:var(--r-pill);
  background:var(--blue);
  color:#fff;
  font-size:12.5px;
  font-weight:500;
  transition:background-color .2s var(--ease);
}
.nav__cta:hover{background:var(--blue-hover)}

.nav__toggle{
  display:none;
  width:40px;height:40px;
  margin-left:auto;
  align-items:center;
  justify-content:center;
  color:#F5F5F7;
}
.nav__toggle span{
  display:block;
  width:17px;height:1.5px;
  background:currentColor;
  position:relative;
  transition:background .2s;
}
.nav__toggle span::before,
.nav__toggle span::after{
  content:"";
  position:absolute;left:0;
  width:17px;height:1.5px;
  background:currentColor;
  transition:transform .25s var(--ease);
}
.nav__toggle span::before{top:-5.5px}
.nav__toggle span::after{top:5.5px}

/* 移动端全屏菜单 */
@media (max-width:860px){
  .nav__toggle{display:flex}
  .nav__links{
    /* 注意：.nav 有 backdrop-filter，会成为 fixed 子元素的包含块，
       所以这里用显式高度而不是 inset 的 bottom:0 */
    position:fixed;
    top:var(--nav-h);
    left:0;
    right:0;
    height:calc(100dvh - var(--nav-h));
    flex-direction:column;
    align-items:flex-start;
    justify-content:flex-start;
    gap:0;
    padding:clamp(24px,8vh,64px) var(--pad);
    background:#08090C;
    display:none;
    overflow-y:auto;
  }
  .nav.is-open .nav__links{display:flex}
  .nav.is-open{background:#08090C}
  .nav__link{
    width:100%;
    padding:18px 0;
    font-size:24px;
    font-weight:600;
    letter-spacing:-.02em;
    border-bottom:1px solid var(--line-d-soft);
    color:#F5F5F7;
  }
  .nav__link:first-child{padding-top:0}
  .nav__cta{
    margin-top:32px;
    height:46px;
    padding:0 26px;
    font-size:16px;
  }
  .nav.is-open .nav__toggle span{background:transparent}
  .nav.is-open .nav__toggle span::before{transform:translateY(5.5px) rotate(45deg)}
  .nav.is-open .nav__toggle span::after{transform:translateY(-5.5px) rotate(-45deg)}
}

/* ---------- 产品图 ---------- */
.shot{position:relative;width:100%}
.shot__img{position:relative;z-index:1;width:100%;height:auto;display:block}
.shot__reflection{
  position:absolute;
  left:0;
  top:calc(100% - 2px);
  width:100%;
  height:auto;
  transform:scaleY(-1);
  opacity:.16;
  pointer-events:none;
  -webkit-mask-image:linear-gradient(to bottom,#000 0%,rgba(0,0,0,.35) 34%,transparent 62%);
  mask-image:linear-gradient(to bottom,#000 0%,rgba(0,0,0,.35) 34%,transparent 62%);
}

/* ---------- 首屏 ---------- */
.hero{
  position:relative;
  min-height:100dvh;
  display:flex;
  align-items:center;
  padding-top:calc(var(--nav-h) + 28px);
  padding-bottom:clamp(28px,4vw,48px);
  background:radial-gradient(120% 80% at 50% 0%,#15161B 0%,#0B0C10 45%,#08090C 100%);
  color:#F5F5F7;
  overflow:hidden;
}
.hero__inner{
  width:100%;
  max-width:var(--maxw);
  margin-inline:auto;
  padding-inline:var(--pad);
  text-align:center;
}
.hero__title{margin-bottom:16px;font-size:clamp(34px,5.2vw,72px)}
.hero__sub{
  font-size:clamp(16px,1.5vw,20px);
  line-height:1.55;
  color:#A1A1A6;
  max-width:600px;
  margin-inline:auto;
  letter-spacing:-.012em;
}
.hero__actions{margin-top:26px}
.hero__product{
  width:fit-content;
  max-width:min(560px,64vw);
  height:min(47vh,470px);
  margin:clamp(18px,3vw,38px) auto 0;
}
.hero__product .shot__img{height:100%;width:auto;max-width:100%}
@media (max-width:860px){
  .hero{min-height:auto;padding-top:calc(var(--nav-h) + 48px);padding-bottom:56px}
  .hero__product{max-width:min(440px,86vw);height:min(44vh,380px)}
}

/* ---------- 产品瓦片 ---------- */
.tile{
  position:relative;
  display:flex;
  flex-direction:column;
  align-items:center;
  padding:clamp(28px,4vw,52px) clamp(20px,3vw,40px) 0;
  border-radius:var(--r-lg);
  background:var(--gray);
  overflow:hidden;
  text-align:center;
  transition:background-color .3s var(--ease);
}
.tile--dark{background:var(--black-soft);color:#F5F5F7}
.tile__kicker{
  font-size:12px;
  font-weight:600;
  letter-spacing:.02em;
  color:var(--muted);
  margin-bottom:10px;
}
.tile h3{margin-bottom:8px}
.tile p{
  font-size:15px;
  line-height:1.5;
  color:var(--muted);
  max-width:300px;
  margin-bottom:16px;
}
.tile--dark p{color:#A1A1A6}
.tile__shot{width:min(300px,80%);margin-top:auto;padding-top:22px}

/* ---------- 特性行 ---------- */
.feature{
  display:grid;
  grid-template-columns:minmax(0,1fr) minmax(0,1fr);
  gap:clamp(28px,6vw,88px);
  align-items:center;
  padding-block:clamp(44px,6vw,84px);
  border-top:1px solid var(--line-d-soft);
}
.feature:first-of-type{border-top:0;padding-top:0}
.sec--light .feature,.sec--gray .feature{border-top-color:var(--line)}
.feature--flip .feature__media{order:2}
@media (max-width:860px){
  .feature{grid-template-columns:1fr;gap:28px}
  .feature--flip .feature__media{order:0}
}
.feature h3{margin-bottom:14px}
.feature p{font-size:17px;line-height:1.6;color:var(--muted);max-width:440px}
.sec--dark .feature p{color:#A1A1A6}
.feature .link{margin-top:20px}
.feature__media{
  border-radius:var(--r-md);
  background:var(--black-soft);
  padding:clamp(22px,4vw,40px);
  display:grid;
  place-items:center;
  min-height:240px;
  overflow:hidden;
}
.sec--light .feature__media{background:var(--gray)}
.sec--gray .feature__media{background:var(--white)}

/* ---------- 极简图形 ---------- */
.graphic{width:100%;max-width:380px;display:block;color:#F5F5F7}
.sec--light .graphic,.sec--gray .graphic{color:var(--ink)}
.graphic .ln{stroke:currentColor;stroke-width:1.5;fill:none;stroke-linecap:round;stroke-linejoin:round}
.graphic .ln-soft{opacity:.32}

.wave{display:flex;align-items:center;justify-content:center;gap:6px;height:168px;width:100%;color:#F5F5F7}
.sec--light .wave,.sec--gray .wave{color:var(--ink)}
.wave i{
  display:block;
  width:5px;
  border-radius:3px;
  background:currentColor;
  height:var(--h);
  animation:waveIdle 3.2s ease-in-out infinite;
}
.wave i:nth-child(3n){animation-delay:-.6s}
.wave i:nth-child(4n){animation-delay:-1.2s}
@keyframes waveIdle{
  0%,100%{transform:scaleY(.7);opacity:.5}
  50%{transform:scaleY(1);opacity:1}
}

.layers{display:flex;flex-direction:column;gap:8px;width:100%;max-width:340px;color:#F5F5F7}
.sec--light .layers,.sec--gray .layers{color:var(--ink)}
.layers div{
  height:34px;
  border:1px solid currentColor;
  border-radius:var(--r-xs);
  display:flex;
  align-items:center;
  padding:0 12px;
  font-size:12.5px;
  letter-spacing:.01em;
  opacity:.45;
}
.layers div:nth-child(1){opacity:.85}
.layers div:nth-child(2){opacity:.6}
.layers div:nth-child(3){opacity:.42}
.layers div:nth-child(4){opacity:.28}

.chips{display:flex;flex-wrap:wrap;gap:10px;justify-content:center}
.chips span{
  padding:13px 26px;
  border-radius:var(--r-pill);
  border:1px solid var(--line-d);
  font-size:16px;
  color:#F5F5F7;
}
.sec--light .chips span,.sec--gray .chips span{border-color:var(--line-strong);color:var(--ink)}

/* ---------- 数字人物展示 ---------- */
.showcase{
  text-align:center;
  padding-block:clamp(64px,9vw,120px);
  overflow:hidden;
}
.showcase__stage{
  position:relative;
  width:min(500px,76vw);
  margin:0 auto;
}
.showcase__stage::before{
  content:"";
  position:absolute;
  left:50%;top:0;
  width:130%;height:70%;
  transform:translate(-50%,-12%);
  background:radial-gradient(closest-side,rgba(120,160,255,.15),transparent 72%);
  filter:blur(10px);
  pointer-events:none;
}
.showcase__caption{
  margin-top:clamp(24px,3vw,40px);
  font-size:15px;
  color:var(--muted);
}

/* ---------- 架构图 ---------- */
.diagram{display:flex;flex-direction:column;align-items:center;gap:0;max-width:820px;margin-inline:auto}
.diagram__row{
  display:flex;
  align-items:center;
  justify-content:center;
  gap:clamp(8px,1.6vw,16px);
  width:100%;
}
.diagram__tag{
  width:60px;
  flex-shrink:0;
  text-align:right;
  font-size:12px;
  color:var(--muted);
  letter-spacing:.02em;
}
.diagram__boxes{
  display:flex;
  flex-wrap:wrap;
  gap:clamp(8px,1.4vw,14px);
  flex:1;
  justify-content:center;
}
.node{
  flex:1 1 0;
  min-width:108px;
  padding:16px 14px;
  border:1px solid var(--line);
  border-radius:var(--r-sm);
  background:var(--white);
  text-align:center;
  font-size:14px;
  color:var(--ink);
  line-height:1.3;
  transition:border-color .25s var(--ease),box-shadow .25s var(--ease);
}
.node:hover{border-color:var(--blue);box-shadow:0 0 0 3px rgba(0,113,227,.08)}
.node small{display:block;font-size:12px;color:var(--muted);margin-top:4px}
.node--key{border-color:rgba(0,113,227,.4);background:rgba(0,113,227,.04)}
.diagram__line{
  width:1px;
  height:clamp(20px,3vw,32px);
  background:var(--line-strong);
  position:relative;
}
.diagram__line::after{
  content:"";
  position:absolute;
  left:50%;bottom:0;
  width:5px;height:5px;
  margin-left:-2.5px;
  border-radius:50%;
  background:var(--blue);
  animation:flowDot 2.6s var(--ease) infinite;
}
@keyframes flowDot{
  0%{transform:translateY(-22px);opacity:0}
  30%{opacity:1}
  100%{transform:translateY(0);opacity:0}
}
@media (max-width:700px){
  .diagram__tag{display:none}
  .node{min-width:44%;font-size:13px}
}

/* ---------- 场景 ---------- */
.scene{
  display:flex;
  flex-direction:column;
  gap:10px;
  padding:clamp(24px,3vw,34px);
  border-radius:var(--r-md);
  background:var(--white);
  border:1px solid var(--line);
  transition:transform .3s var(--ease),border-color .3s var(--ease);
}
.scene:hover{transform:translateY(-3px);border-color:var(--line-strong)}
.scene h4{font-size:18px;margin-bottom:2px}
.scene p{font-size:14.5px;line-height:1.55;color:var(--muted);margin:0}
.scene__num{font-size:12px;color:var(--muted);letter-spacing:.04em;margin-bottom:6px}

/* ---------- 理念 ---------- */
.manifesto{
  text-align:center;
  padding-block:clamp(80px,12vw,170px);
  background:var(--black);
  color:#F5F5F7;
}
.manifesto p{
  font-size:clamp(24px,3.6vw,44px);
  line-height:1.24;
  letter-spacing:-.025em;
  max-width:880px;
  margin-inline:auto;
  font-weight:500;
}
.manifesto p + p{margin-top:20px}
.manifesto .dim{color:#6E6E73}

/* ---------- 规格 ---------- */
.spec-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:clamp(14px,2vw,24px)}
@media (max-width:860px){.spec-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
.spec{padding:clamp(20px,2.4vw,28px) 0;border-top:2px solid var(--ink)}
.sec--dark .spec{border-top-color:#F5F5F7}
.spec__val{
  font-size:clamp(28px,3.2vw,40px);
  font-weight:600;
  letter-spacing:-.03em;
  line-height:1.1;
  margin-bottom:6px;
}
.spec__val small{font-size:.45em;font-weight:500;letter-spacing:0;color:var(--muted);margin-left:2px}
.spec__label{font-size:14px;color:var(--muted);line-height:1.45}

.spec-list{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:0 clamp(32px,5vw,72px)}
@media (max-width:700px){.spec-list{grid-template-columns:1fr}}
.spec-row{
  display:flex;
  justify-content:space-between;
  gap:24px;
  padding:16px 0;
  border-bottom:1px solid var(--line);
  font-size:15px;
}
.sec--dark .spec-row{border-bottom-color:var(--line-d-soft)}
.spec-row dt{color:var(--muted);margin:0}
.spec-row dd{margin:0;text-align:right;color:var(--ink)}
.sec--dark .spec-row dd{color:#F5F5F7}

/* ---------- 表格 ---------- */
.table-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:var(--r-md);background:var(--white)}
table{width:100%;border-collapse:collapse;font-size:15px;min-width:520px}
thead th{
  text-align:left;
  padding:16px 20px;
  font-size:12.5px;
  font-weight:600;
  color:var(--muted);
  border-bottom:1px solid var(--line);
  white-space:nowrap;
}
tbody td,tbody th{
  padding:16px 20px;
  border-bottom:1px solid var(--line);
  text-align:left;
  font-weight:400;
  color:var(--ink-2);
}
tbody th{color:var(--ink);font-weight:600;white-space:nowrap}
tbody tr:last-child td,tbody tr:last-child th{border-bottom:0}

/* ---------- 联系 ---------- */
.contact{
  display:grid;
  grid-template-columns:minmax(0,1fr) auto;
  gap:clamp(32px,5vw,72px);
  align-items:center;
}
@media (max-width:820px){
  .contact{grid-template-columns:1fr;justify-items:center;text-align:center}
  .contact .lead{margin-inline:auto}
}
.qcard{
  width:264px;
  padding:20px;
  border-radius:22px;
  background:var(--white);
  border:1px solid var(--line);
  box-shadow:0 30px 70px -34px rgba(0,0,0,.45);
  text-align:center;
}
.sec--dark .qcard{box-shadow:0 30px 70px -28px rgba(0,0,0,.85)}
.qcard img{width:100%;height:auto;display:block;border-radius:10px}
.qcard__hint{margin-top:14px;font-size:13px;line-height:1.5;color:var(--muted)}
.qcard--sm{width:150px;padding:12px;border-radius:16px;box-shadow:none}
.qcard--sm .qcard__hint{font-size:12px;margin-top:10px}

/* ---------- 页脚 ---------- */
.footer{
  background:var(--black);
  color:#F5F5F7;
  padding-block:clamp(48px,6vw,72px) 32px;
  border-top:1px solid var(--line-d-soft);
}
.footer__grid{
  display:grid;
  grid-template-columns:1.6fr 1fr 1fr 1fr;
  gap:clamp(24px,4vw,56px);
  padding-bottom:clamp(32px,4vw,48px);
}
@media (max-width:820px){
  .footer__grid{grid-template-columns:1fr 1fr}
  .footer__brand{grid-column:1 / -1}
}
.footer__brand p{margin-top:14px;font-size:13px;line-height:1.6;color:#86868B;max-width:300px}
.footer h5{margin:0 0 14px;font-size:12.5px;font-weight:600;color:#F5F5F7}
.footer ul{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:10px}
.footer li a{font-size:13px;color:#86868B;transition:color .2s var(--ease)}
.footer li a:hover{color:#F5F5F7}
.footer__qr{display:flex;flex-direction:column;gap:12px}
.footer__bottom{
  border-top:1px solid var(--line-d-soft);
  padding-top:22px;
  display:flex;
  flex-wrap:wrap;
  gap:12px 24px;
  justify-content:space-between;
  font-size:12px;
  color:#6E6E73;
}
.footer__bottom a:hover{color:#F5F5F7}

/* ---------- 弹窗 ---------- */
.modal{
  position:fixed;
  inset:0;
  z-index:200;
  display:grid;
  place-items:center;
  padding:20px;
  opacity:0;
  pointer-events:none;
  transition:opacity .22s var(--ease);
}
.modal.is-open{opacity:1;pointer-events:auto}
.modal__backdrop{
  position:absolute;
  inset:0;
  background:rgba(8,9,12,.72);
  backdrop-filter:blur(10px);
  -webkit-backdrop-filter:blur(10px);
}
.modal__box{
  position:relative;
  width:100%;
  max-width:400px;
  background:var(--white);
  color:var(--ink);
  border-radius:24px;
  padding:clamp(24px,3.4vw,34px);
  text-align:center;
  transform:translateY(10px);
  transition:transform .28s var(--ease);
  box-shadow:0 40px 100px -40px rgba(0,0,0,.6);
}
.modal.is-open .modal__box{transform:none}
.modal__box h3{margin-bottom:10px}
.modal__box > p{font-size:14.5px;line-height:1.55;color:var(--muted);margin-bottom:22px}
.modal__qr{display:flex;justify-content:center;margin-bottom:18px}
.modal__qr .qcard{width:236px;box-shadow:none;border-color:var(--line)}
.modal__note{font-size:12.5px;line-height:1.6;color:var(--muted);margin:0}
.modal__close{
  position:absolute;
  top:14px;right:14px;
  width:32px;height:32px;
  border-radius:50%;
  display:grid;place-items:center;
  color:var(--muted);
  transition:background-color .2s,color .2s;
}
.modal__close:hover{background:var(--gray);color:var(--ink)}

/* ---------- 动效 ---------- */
.reveal{
  opacity:0;
  transform:translateY(18px);
  transition:opacity .8s var(--ease),transform .8s var(--ease);
  will-change:opacity,transform;
}
.reveal.is-in{opacity:1;transform:none}
.reveal[data-d="1"]{transition-delay:.06s}
.reveal[data-d="2"]{transition-delay:.12s}
.reveal[data-d="3"]{transition-delay:.18s}
.reveal[data-d="4"]{transition-delay:.24s}

.hero__inner > *{animation:heroIn .9s var(--ease) both}
.hero__inner > *:nth-child(1){animation-delay:.05s}
.hero__inner > *:nth-child(2){animation-delay:.12s}
.hero__inner > *:nth-child(3){animation-delay:.2s}
.hero__inner > *:nth-child(4){animation-delay:.3s}
.hero__product{animation-delay:.38s !important}
@keyframes heroIn{
  from{opacity:0;transform:translateY(14px)}
  to{opacity:1;transform:none}
}

.fade-in-image{opacity:.12;transition:opacity 1.4s var(--ease)}
.fade-in-image.is-in{opacity:1}

/* ---------- 返回顶部 ---------- */
.to-top{
  position:fixed;
  right:20px;
  bottom:20px;
  width:40px;height:40px;
  border-radius:50%;
  display:grid;place-items:center;
  background:rgba(255,255,255,.92);
  color:var(--ink);
  box-shadow:0 6px 20px rgba(0,0,0,.18);
  opacity:0;
  transform:translateY(8px);
  pointer-events:none;
  transition:opacity .3s var(--ease),transform .3s var(--ease);
  z-index:90;
}
.to-top.is-visible{opacity:1;transform:none;pointer-events:auto}
.to-top:hover{background:#fff}

/* ---------- 内页首屏 ---------- */
.page-hero{
  padding-top:calc(var(--nav-h) + clamp(48px,7vw,96px));
  padding-bottom:clamp(40px,6vw,72px);
  background:radial-gradient(120% 80% at 50% 0%,#15161B 0%,#0B0C10 45%,#08090C 100%);
  color:#F5F5F7;
  text-align:center;
  overflow:hidden;
}
.page-hero__inner{
  max-width:var(--maxw);
  margin-inline:auto;
  padding-inline:var(--pad);
}
.page-hero h1{margin-bottom:18px}
.page-hero .lead{margin-inline:auto;margin-bottom:26px}
.page-hero__product{width:min(370px,58vw);margin:clamp(24px,4vw,48px) auto 0}
.crumbs{
  display:flex;
  justify-content:center;
  gap:8px;
  font-size:12.5px;
  color:#86868B;
  margin-bottom:22px;
}
.crumbs a:hover{color:#F5F5F7}
.crumbs span{color:#545458}

/* ---------- 减少动效 ---------- */
@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}
  .fade-in-image{opacity:1}
  .hero__inner > *{animation:none}
}

/* ---------- 打印 ---------- */
@media print{
  body{background:#fff;color:#000}
  .nav,.to-top,.modal{display:none}
  .sec{padding-block:24px}
}

/* ---------- 局部细节放大 ---------- */
/* 完整展示：图片按高度铺满、水平居中，不裁切 */
.feature__media--product{
  position:relative;
  aspect-ratio:4/3;
  padding:0;
  min-height:0;
}
.feature__media--product img{
  position:absolute;
  inset:0;
  margin:auto;
  width:auto;
  height:90%;
}

/* ---------- 移动端换行控制 ---------- */
.br-m{display:inline}
@media (max-width:600px){
  .br-m{display:none}
}

/* ---------- 列表 / 模型卡 ---------- */
.plain-list{
  list-style:none;
  margin:20px 0 0;
  padding:0;
  display:flex;
  flex-direction:column;
  gap:8px;
  max-width:440px;
}
.plain-list li{
  position:relative;
  padding-left:16px;
  font-size:15px;
  line-height:1.55;
  color:var(--muted);
}
.sec--dark .plain-list li{color:#A1A1A6}
.plain-list li::before{
  content:"";
  position:absolute;
  left:0;top:.62em;
  width:5px;height:5px;
  border-radius:50%;
  background:var(--blue);
}

.model-card{
  display:flex;
  flex-direction:column;
  padding:clamp(22px,2.6vw,30px);
  border-radius:var(--r-md);
  background:var(--white);
  border:1px solid var(--line);
  transition:border-color .25s var(--ease);
}
.model-card:hover{border-color:var(--line-strong)}
.model-card h4{font-size:19px;margin-bottom:4px}
.model-card .m-tag{font-size:11.5px;letter-spacing:.06em;color:var(--muted);margin-bottom:12px}
.model-card p{font-size:14.5px;line-height:1.55;color:var(--muted);margin:0}
.model-card .m-best{
  margin-top:auto;
  padding-top:14px;
  border-top:1px solid var(--line);
  font-size:14px;
  color:var(--ink-2);
}
.model-card .m-best b{color:var(--ink);font-weight:600}