/* ==========================================================================
   星游品牌站 · Site Kit
   视觉母题：夜间天文台 × 数字控制台 / 星图坐标网格
   ========================================================================== */

:root{
  --ink-deep:#0B1026;
  --ink-panel:#141B3D;
  --ink-black:#050712;
  --cyan:#5CE1E6;
  --signal:#FF7A3D;
  --violet:#A99BE8;
  --silver:#C9D3E0;
  --paper:#F4F7FB;
  --line:#2A3555;

  --fs-1:.75rem;
  --fs-2:1rem;
  --fs-3:1.25rem;
  --fs-4:1.75rem;
  --fs-5:2.5rem;
  --fs-6:4rem;
  --fs-7:6rem;

  --shell:1280px;
  --gutter:clamp(1rem,4vw,2.5rem);
  --radius-lg:32px;
  --radius-md:24px;
  --radius-sm:16px;
  --pill:999px;

  --font-head:"PingFang SC","HarmonyOS Sans SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --font-body:"Source Han Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --font-mono:ui-monospace,SFMono-Regular,Menlo,Consolas,"Liberation Mono","Courier New",monospace;

  --ease:cubic-bezier(.2,.7,.3,1);
}

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

html{
  -webkit-text-size-adjust:100%;
  scroll-behavior:smooth;
}

body{
  margin:0;
  min-height:100vh;
  font-family:var(--font-body);
  font-size:var(--fs-2);
  line-height:1.8;
  color:var(--silver);
  background-color:var(--ink-deep);
  background-image:
    radial-gradient(circle at 82% -8%, rgba(92,225,230,.10), transparent 55%),
    radial-gradient(circle at 4% 6%, rgba(169,155,232,.09), transparent 46%),
    linear-gradient(to right, rgba(42,53,85,.32) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(42,53,85,.20) 1px, transparent 1px);
  background-size:auto, auto, 96px 96px, 96px 96px;
  background-attachment:fixed;
  -webkit-font-smoothing:antialiased;
}

img,svg,video{max-width:100%;display:block;}
a{color:var(--cyan);text-decoration:none;}
p{margin:0;}
ul,ol{margin:0;}
button{font:inherit;}

h1,h2,h3,h4,h5,h6{
  margin:0;
  font-family:var(--font-head);
  font-weight:700;
  line-height:1.15;
  letter-spacing:-.03em;
  color:var(--paper);
}
h1{font-size:clamp(2.5rem,6.2vw,6rem);}
h2{font-size:clamp(1.75rem,3.4vw,2.75rem);line-height:1.2;}
h3{font-size:clamp(1.25rem,2vw,1.75rem);line-height:1.3;}
h4{font-size:var(--fs-3);line-height:1.35;}

:focus-visible{
  outline:2px solid var(--cyan);
  outline-offset:3px;
  border-radius:4px;
}

#main-content{scroll-margin-top:150px;}

/* ---------- 容器 ---------- */
.shell{
  width:100%;
  max-width:var(--shell);
  margin-inline:auto;
  padding-inline:var(--gutter);
}

/* ---------- 跳转链接 ---------- */
.skip-link{
  position:fixed;
  left:1rem;
  top:-120px;
  z-index:1000;
  display:inline-flex;
  align-items:center;
  min-height:44px;
  padding:.6rem 1.2rem;
  border-radius:var(--pill);
  background:var(--cyan);
  color:var(--ink-black);
  font-family:var(--font-head);
  font-weight:700;
  font-size:.9375rem;
  letter-spacing:.02em;
  transition:top .2s var(--ease);
}
.skip-link:focus{top:1rem;}

/* ---------- 头部 ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:60;
}

.header-upper{
  background:rgba(5,7,18,.94);
  border-bottom:1px solid rgba(42,53,85,.9);
  -webkit-backdrop-filter:blur(10px);
  backdrop-filter:blur(10px);
}

.header-upper__inner{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:.4rem 1.5rem;
  padding-block:.55rem;
}

.header-upper__tagline{
  display:inline-flex;
  align-items:center;
  gap:.6rem;
  margin:0;
  font-family:var(--font-mono);
  font-size:.6875rem;
  letter-spacing:.14em;
  color:rgba(201,211,224,.78);
  text-transform:uppercase;
}

.header-upper__dot{
  width:6px;
  height:6px;
  flex:0 0 auto;
  border-radius:50%;
  background:var(--cyan);
  box-shadow:0 0 0 3px rgba(92,225,230,.16);
  animation:star-breathe 4.6s var(--ease) infinite;
}

@keyframes star-breathe{
  0%,100%{opacity:.55;transform:scale(.85);}
  50%{opacity:1;transform:scale(1.08);}
}

.header-upper__meta{
  display:flex;
  align-items:center;
  gap:clamp(.9rem,2vw,1.6rem);
}

.header-upper__link{
  font-family:var(--font-mono);
  font-size:.6875rem;
  letter-spacing:.12em;
  color:rgba(201,211,224,.68);
  border-bottom:1px solid transparent;
  padding-bottom:2px;
  transition:color .2s var(--ease),border-color .2s var(--ease);
}
.header-upper__link:hover{color:var(--cyan);border-bottom-color:rgba(92,225,230,.6);}
.header-upper__link--signal{color:var(--signal);}
.header-upper__link--signal:hover{color:var(--signal);border-bottom-color:rgba(255,122,61,.7);}

.header-lower{
  position:relative;
  background:rgba(11,16,38,.92);
  border-bottom:1px solid var(--line);
  -webkit-backdrop-filter:blur(14px);
  backdrop-filter:blur(14px);
}

.header-lower__inner{
  display:flex;
  align-items:center;
  gap:clamp(1rem,2.5vw,2.5rem);
  padding-block:.85rem;
}

.brand{
  display:inline-flex;
  align-items:center;
  gap:.75rem;
  text-decoration:none;
  flex:0 0 auto;
}

.brand__mark{
  position:relative;
  width:44px;
  height:44px;
  flex:0 0 auto;
  border-radius:50%;
  border:1px solid var(--line);
  background:radial-gradient(circle at 50% 50%, rgba(92,225,230,.18), transparent 64%);
  overflow:hidden;
}

.brand__orbit{
  position:absolute;
  inset:6px;
  border-radius:50%;
  border:1px solid rgba(92,225,230,.5);
  transition:transform .5s var(--ease);
}
.brand__orbit--a{transform:rotate(24deg) scaleY(.5);}
.brand__orbit--b{transform:rotate(-58deg) scaleY(.4);border-color:rgba(169,155,232,.6);}
.brand:hover .brand__orbit--a{transform:rotate(52deg) scaleY(.5);}
.brand:hover .brand__orbit--b{transform:rotate(-86deg) scaleY(.4);}

.brand__core{
  position:absolute;
  left:50%;
  top:50%;
  width:8px;
  height:8px;
  margin:-4px 0 0 -4px;
  border-radius:50%;
  background:var(--signal);
  box-shadow:0 0 12px rgba(255,122,61,.85);
}

.brand__text{display:flex;flex-direction:column;line-height:1.15;}

.brand__name{
  font-family:var(--font-head);
  font-size:1.0625rem;
  font-weight:700;
  letter-spacing:-.02em;
  color:var(--paper);
}

.brand__sub{
  font-family:var(--font-mono);
  font-size:.625rem;
  letter-spacing:.18em;
  color:rgba(201,211,224,.5);
}

.nav-toggle{
  display:none;
  align-items:center;
  gap:.55rem;
  min-height:44px;
  margin-left:auto;
  padding:.5rem .95rem;
  border-radius:var(--pill);
  border:1px solid rgba(92,225,230,.35);
  background:rgba(20,27,61,.85);
  color:var(--paper);
  font-family:var(--font-mono);
  font-size:.6875rem;
  letter-spacing:.14em;
  cursor:pointer;
  transition:border-color .2s var(--ease),background-color .2s var(--ease);
}
.nav-toggle:hover{border-color:var(--cyan);background:rgba(92,225,230,.12);}

.nav-toggle__bars{
  position:relative;
  display:block;
  width:16px;
  height:10px;
}
.nav-toggle__bars::before,
.nav-toggle__bars::after{
  content:"";
  position:absolute;
  left:0;
  right:0;
  height:1.5px;
  border-radius:2px;
  background:currentColor;
  transition:transform .25s var(--ease);
}
.nav-toggle__bars::before{top:0;}
.nav-toggle__bars::after{bottom:0;}

[data-site-header][data-open] .nav-toggle__bars::before{transform:translateY(4.25px) rotate(45deg);}
[data-site-header][data-open] .nav-toggle__bars::after{transform:translateY(-4.25px) rotate(-45deg);}
[data-site-header][data-open] .nav-toggle{border-color:var(--signal);color:var(--signal);}

.primary-nav{
  display:flex;
  align-items:center;
  gap:clamp(1rem,2.4vw,2rem);
  margin-left:auto;
}

.primary-nav__list{
  display:flex;
  align-items:center;
  gap:clamp(.6rem,1.8vw,1.5rem);
  list-style:none;
  margin:0;
  padding:0;
}

.primary-nav__item{list-style:none;}

.primary-nav__link{
  position:relative;
  display:inline-block;
  padding:.45rem .2rem;
  font-family:var(--font-head);
  font-size:.9375rem;
  letter-spacing:.01em;
  color:rgba(201,211,224,.8);
  white-space:nowrap;
  transition:color .2s var(--ease);
}
.primary-nav__link::after{
  content:"";
  position:absolute;
  left:.2rem;
  right:.2rem;
  bottom:.1rem;
  height:1px;
  background:var(--cyan);
  transform:scaleX(0);
  transform-origin:0 50%;
  transition:transform .28s var(--ease),background-color .2s var(--ease);
}
.primary-nav__link:hover{color:var(--paper);}
.primary-nav__link:hover::after{transform:scaleX(1);}
.primary-nav__link[aria-current="page"]{color:var(--cyan);}
.primary-nav__link[aria-current="page"]::after{transform:scaleX(1);background:var(--signal);}

.primary-nav__cta{
  flex:0 0 auto;
  padding:.55rem 1.15rem;
  font-size:.875rem;
  min-height:42px;
}

.header-progress{
  position:absolute;
  left:0;
  right:0;
  bottom:0;
  height:2px;
  display:block;
  background:rgba(42,53,85,.6);
  overflow:hidden;
  pointer-events:none;
}
.header-progress__bar{
  display:block;
  width:100%;
  height:100%;
  transform:scaleX(0);
  transform-origin:0 50%;
  background:linear-gradient(90deg,var(--cyan),var(--violet) 55%,var(--signal));
  box-shadow:0 0 12px rgba(92,225,230,.6);
}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:.5rem;
  min-height:44px;
  padding:.65rem 1.4rem;
  border:1px solid transparent;
  border-radius:var(--pill);
  font-family:var(--font-head);
  font-size:.9375rem;
  font-weight:600;
  letter-spacing:.01em;
  text-decoration:none;
  cursor:pointer;
  transition:transform .2s var(--ease),background-color .2s var(--ease),
             border-color .2s var(--ease),color .2s var(--ease),box-shadow .2s var(--ease);
}
.btn--signal{
  background:var(--signal);
  color:var(--ink-black);
  box-shadow:0 0 0 1px rgba(255,122,61,.35),0 14px 32px -16px rgba(255,122,61,.9);
}
.btn--signal:hover{background:#ff8f5e;transform:translateY(-1px);}
.btn--ghost{
  background:transparent;
  color:var(--paper);
  border-color:rgba(92,225,230,.42);
}
.btn--ghost:hover{border-color:var(--cyan);color:var(--cyan);transform:translateY(-1px);}
.btn--quiet{
  background:rgba(169,155,232,.14);
  color:var(--violet);
  border-color:rgba(169,155,232,.28);
}
.btn--quiet:hover{background:rgba(169,155,232,.24);color:#c3b8f2;}

/* ---------- 页脚 ---------- */
.site-footer{
  position:relative;
  margin-top:clamp(4rem,9vw,8rem);
  background:var(--ink-black);
  border-top:1px solid var(--line);
  overflow:hidden;
}
.site-footer::before{
  content:"";
  position:absolute;
  right:-180px;
  top:-180px;
  width:520px;
  height:520px;
  border-radius:50%;
  border:1px solid rgba(92,225,230,.12);
  pointer-events:none;
}
.site-footer::after{
  content:"";
  position:absolute;
  left:-140px;
  bottom:-220px;
  width:440px;
  height:440px;
  border-radius:50%;
  border:1px solid rgba(169,155,232,.12);
  pointer-events:none;
}

.footer-grid{
  position:relative;
  z-index:1;
  display:grid;
  grid-template-columns:minmax(0,1.5fr) minmax(0,.8fr) minmax(0,.9fr) minmax(0,1.3fr);
  gap:clamp(1.75rem,3.5vw,3.5rem);
  padding-block:clamp(2.75rem,6vw,4.5rem) clamp(2rem,4vw,3rem);
}

.footer-brand{display:flex;flex-direction:column;gap:.85rem;}

.footer-coord{
  margin:0;
  font-family:var(--font-mono);
  font-size:.6875rem;
  letter-spacing:.16em;
  color:var(--cyan);
  padding-bottom:.7rem;
  border-bottom:1px solid rgba(92,225,230,.22);
}

.footer-brand__name{
  margin:0;
  font-family:var(--font-head);
  font-size:1.5rem;
  font-weight:700;
  letter-spacing:-.02em;
  color:var(--paper);
}

.footer-brand__line{
  margin:0;
  font-size:.875rem;
  line-height:1.75;
  color:rgba(201,211,224,.66);
  max-width:24em;
}

.footer-brand__icp{
  margin:0;
  font-family:var(--font-mono);
  font-size:.75rem;
  letter-spacing:.08em;
  color:rgba(255,122,61,.92);
}

.footer-col{display:flex;flex-direction:column;}

.footer-col__title{
  margin:0 0 .95rem;
  padding-top:.7rem;
  border-top:1px solid rgba(42,53,85,.95);
  font-family:var(--font-mono);
  font-size:.6875rem;
  font-weight:500;
  letter-spacing:.2em;
  text-transform:uppercase;
  color:rgba(201,211,224,.5);
}

.footer-list{
  list-style:none;
  margin:0;
  padding:0;
  display:grid;
  gap:.6rem;
}
.footer-list a{
  font-size:.9375rem;
  color:rgba(201,211,224,.8);
  transition:color .2s var(--ease),padding-left .2s var(--ease);
}
.footer-list a:hover{color:var(--cyan);padding-left:.3rem;}

.footer-contact{display:flex;flex-direction:column;}

.footer-contact__list{
  list-style:none;
  margin:0;
  padding:0;
  display:grid;
  gap:.75rem;
}

.footer-contact__item{display:grid;gap:.1rem;}

.footer-contact__key{
  font-family:var(--font-mono);
  font-size:.6875rem;
  letter-spacing:.14em;
  color:rgba(201,211,224,.42);
}

.footer-contact__value{
  font-size:.9375rem;
  line-height:1.6;
  color:rgba(244,247,251,.88);
  word-break:break-word;
}

.footer-bottom{
  position:relative;
  z-index:1;
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:.75rem 1.5rem;
  padding-block:1.25rem;
  border-top:1px solid var(--line);
  font-family:var(--font-mono);
  font-size:.6875rem;
  letter-spacing:.1em;
  color:rgba(201,211,224,.48);
}
.footer-bottom__note{margin:0;}
.footer-bottom__track{margin:0;color:rgba(92,225,230,.55);}

/* ---------- 面包屑 ---------- */
.breadcrumbs{
  padding-block:1rem;
  border-bottom:1px solid rgba(42,53,85,.6);
}
.breadcrumbs__list{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:.5rem;
  list-style:none;
  margin:0;
  padding:0;
  font-family:var(--font-mono);
  font-size:.6875rem;
  letter-spacing:.1em;
  color:rgba(201,211,224,.5);
}
.breadcrumbs__item{display:inline-flex;align-items:center;gap:.5rem;}
.breadcrumbs__link{color:rgba(201,211,224,.78);transition:color .2s var(--ease);}
.breadcrumbs__link:hover{color:var(--cyan);}
.breadcrumbs__sep{color:rgba(92,225,230,.45);}

/* ---------- 段落与主题带 ---------- */
.section{padding-block:clamp(2.5rem,6vw,5.5rem);}

.section__head{
  display:flex;
  flex-wrap:wrap;
  align-items:flex-end;
  justify-content:space-between;
  gap:1rem 2rem;
  margin-bottom:clamp(1.75rem,3vw,2.75rem);
  padding-bottom:1.25rem;
  border-bottom:1px solid rgba(42,53,85,.9);
}

.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:.6rem;
  margin:0 0 .85rem;
  font-family:var(--font-mono);
  font-size:.6875rem;
  letter-spacing:.22em;
  text-transform:uppercase;
  color:var(--cyan);
}
.eyebrow::before{
  content:"";
  width:28px;
  height:1px;
  background:currentColor;
  opacity:.85;
}

.coord{
  font-family:var(--font-mono);
  font-size:.6875rem;
  letter-spacing:.18em;
  text-transform:uppercase;
  color:rgba(92,225,230,.8);
}

.rule{
  height:1px;
  border:0;
  margin-block:clamp(2rem,4vw,3.25rem);
  background:linear-gradient(90deg,rgba(92,225,230,.55),rgba(42,53,85,.18) 70%,transparent);
}

.vertical-note{
  writing-mode:vertical-rl;
  text-orientation:mixed;
  font-family:var(--font-mono);
  font-size:.6875rem;
  letter-spacing:.32em;
  text-transform:uppercase;
  color:rgba(201,211,224,.42);
  margin:0;
}

.track-lines{position:relative;}
.track-lines::before{
  content:"";
  position:absolute;
  inset:0;
  z-index:0;
  pointer-events:none;
  background-image:linear-gradient(to right,rgba(42,53,85,.6) 1px,transparent 1px);
  background-size:calc(100% / 3) 100%;
  opacity:.55;
}

/* ---------- 网格 ---------- */
.grid-12{
  display:grid;
  grid-template-columns:repeat(12,minmax(0,1fr));
  gap:clamp(1rem,2vw,1.75rem);
}

/* ---------- 卡片与容器 ---------- */
.card{
  background:linear-gradient(160deg,rgba(20,27,61,.94),rgba(11,16,38,.92));
  border:1px solid var(--line);
  border-radius:var(--radius-md);
  padding:clamp(1.25rem,2.4vw,2rem);
}

.panel{
  background:rgba(20,27,61,.55);
  border:1px solid var(--line);
  border-radius:var(--radius-lg);
  padding:clamp(1.5rem,3vw,2.5rem);
}

.chip{
  display:inline-flex;
  align-items:center;
  gap:.4rem;
  min-height:30px;
  padding:.2rem .85rem;
  border-radius:var(--pill);
  border:1px solid rgba(92,225,230,.35);
  background:rgba(92,225,230,.1);
  color:var(--cyan);
  font-family:var(--font-mono);
  font-size:.6875rem;
  letter-spacing:.1em;
  text-decoration:none;
}

.tag{
  display:inline-flex;
  align-items:center;
  gap:.4rem;
  min-height:30px;
  padding:.2rem .85rem;
  border-radius:var(--pill);
  border:1px solid rgba(169,155,232,.34);
  background:rgba(169,155,232,.13);
  color:var(--violet);
  font-family:var(--font-mono);
  font-size:.6875rem;
  letter-spacing:.1em;
  text-decoration:none;
}

/* ---------- 正文容器 ---------- */
.prose{
  max-width:38em;
  font-size:1.0625rem;
  line-height:1.85;
  color:rgba(201,211,224,.88);
}
.prose > * + *{margin-top:1.1em;}
.prose h2{font-size:var(--fs-4);line-height:1.28;}
.prose h3{font-size:var(--fs-3);line-height:1.34;}
.prose p{margin:0;}
.prose a{color:var(--cyan);text-decoration:underline;text-underline-offset:3px;}
.prose a:hover{color:var(--paper);}
.prose ul,.prose ol{padding-left:1.3em;display:grid;gap:.5em;}
.prose strong{color:var(--paper);font-weight:600;}
.prose li::marker{color:rgba(92,225,230,.75);}

/* ---------- 图片容器基础规则 ---------- */
.media-frame{
  position:relative;
  display:block;
  width:100%;
  aspect-ratio:16 / 9;
  overflow:hidden;
  border-radius:var(--radius-md);
  border:1px solid var(--line);
  background:
    radial-gradient(circle at 72% 18%,rgba(92,225,230,.16),transparent 60%),
    linear-gradient(150deg,var(--ink-panel),var(--ink-black));
}
.media-frame img{
  width:100%;
  height:100%;
  object-fit:cover;
}
.media-frame--wide{aspect-ratio:21 / 9;}
.media-frame--tall{aspect-ratio:4 / 5;border-radius:var(--radius-lg);}

.media-frame__caption{
  margin:.65rem 0 0;
  font-family:var(--font-mono);
  font-size:.6875rem;
  letter-spacing:.1em;
  line-height:1.7;
  color:rgba(201,211,224,.5);
}

/* ---------- 显现动效（由 data-reveal 触发） ---------- */
html.has-js [data-reveal]{
  opacity:0;
  transform:translateY(14px);
  transition:opacity .55s var(--ease),transform .55s var(--ease);
}
html.has-js [data-reveal].is-visible{
  opacity:1;
  transform:none;
}

/* ---------- 中屏 ---------- */
@media (max-width:1024px){
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .footer-brand{grid-column:1 / -1;}
  .grid-12{grid-template-columns:repeat(6,minmax(0,1fr));}
}

/* ---------- 移动导航断点 ---------- */
@media (max-width:1000px){
  .site-header{position:sticky;}
  .nav-toggle{display:inline-flex;}
  .primary-nav{
    position:absolute;
    left:0;
    right:0;
    top:100%;
    display:none;
    flex-direction:column;
    align-items:stretch;
    gap:.75rem;
    margin-left:0;
    padding:1rem var(--gutter) 1.5rem;
    background:rgba(5,7,18,.98);
    border-bottom:1px solid var(--line);
    box-shadow:0 34px 60px -34px rgba(0,0,0,.95);
    max-height:calc(100vh - 120px);
    overflow-y:auto;
  }
  [data-site-header][data-open] .primary-nav{display:flex;}

  .primary-nav__list{
    flex-direction:column;
    align-items:stretch;
    gap:.4rem;
  }
  .primary-nav__item{width:100%;}
  .primary-nav__link{
    display:flex;
    align-items:center;
    justify-content:space-between;
    width:100%;
    padding:.8rem 1.1rem;
    border-radius:var(--pill);
    border:1px solid rgba(42,53,85,.95);
    background:rgba(20,27,61,.85);
    font-size:1rem;
    color:rgba(244,247,251,.9);
  }
  .primary-nav__link::after{display:none;}
  .primary-nav__link[aria-current="page"]{
    border-color:rgba(92,225,230,.6);
    background:rgba(92,225,230,.1);
    color:var(--cyan);
  }
  .primary-nav__cta{width:100%;margin-top:.35rem;}
}

/* ---------- 小屏 ---------- */
@media (max-width:760px){
  .header-upper__inner{padding-block:.5rem;}
  .header-upper__tagline{font-size:.625rem;letter-spacing:.1em;}
  .header-upper__meta{gap:.9rem;}
  .header-upper__link{font-size:.625rem;letter-spacing:.08em;}

  .header-lower__inner{padding-block:.7rem;gap:.75rem;}
  .brand__mark{width:38px;height:38px;}
  .brand__name{font-size:.9375rem;}
  .brand__sub{font-size:.5625rem;letter-spacing:.14em;}

  .footer-grid{grid-template-columns:minmax(0,1fr);gap:2rem;}
  .footer-brand{grid-column:auto;}

  .vertical-note{writing-mode:horizontal-tb;letter-spacing:.2em;}

  .grid-12{grid-template-columns:repeat(2,minmax(0,1fr));}

  .section__head{align-items:flex-start;}

  .footer-bottom{flex-direction:column;align-items:flex-start;}
}

@media (max-width:420px){
  .brand__sub{display:none;}
}

/* ---------- 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;
    scroll-behavior:auto !important;
  }
  html.has-js [data-reveal]{
    opacity:1;
    transform:none;
  }
  .header-progress__bar{transition:none;}
}