/* ==========================================================================
   pcc-canada.com.cn — 共享外壳样式 /assets/site.css
   极光蓝 × 枫叶红 · 玻璃层 × 实色层 · Bento 秩序
   ========================================================================== */

/* ---------- 1. 设计令牌 ---------- */
:root{
  --aurora-deep:#062A54;
  --aurora:#0E6FE0;
  --aurora-light:#63B4FF;
  --aurora-cyan:#4FE3D0;
  --maple:#D62828;
  --maple-soft:#FF6B5B;
  --ice:#F7FAFF;
  --frost:#D9E4F2;
  --ink:#0F1724;
  --slate:#5B6B7F;
  --glass:rgba(255,255,255,.62);
  --glass-strong:rgba(247,250,255,.94);

  --font-display:"HarmonyOS Sans SC","Noto Sans SC","Source Han Sans SC","PingFang SC","Microsoft YaHei",system-ui,sans-serif;
  --font-body:"Noto Sans SC","PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --font-mono:"JetBrains Mono","Roboto Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;

  --shell:1240px;
  --gutter:clamp(16px,4vw,40px);
  --header-h:74px;
  --header-h-scrolled:60px;

  --radius-lg:20px;
  --radius-md:14px;
  --radius-sm:9px;

  --shadow-1:0 1px 2px rgba(6,42,84,.06),0 6px 18px rgba(6,42,84,.06);
  --shadow-2:0 10px 30px rgba(6,42,84,.14),0 2px 6px rgba(6,42,84,.08);
  --shadow-3:0 18px 46px rgba(6,42,84,.20);

  --ease:cubic-bezier(.22,.61,.36,1);
  --dur:.18s;
}

/* ---------- 2. 重置与基础 ---------- */
*,
*::before,
*::after{box-sizing:border-box;}

html{
  -webkit-text-size-adjust:100%;
  scroll-padding-top:calc(var(--header-h) + 18px);
}

body{
  margin:0;
  padding-top:var(--header-h);
  background:var(--ice);
  color:var(--ink);
  font-family:var(--font-body);
  font-size:17px;
  font-weight:400;
  line-height:1.8;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}

body.nav-open{overflow:hidden;}

img,
svg,
picture,
video{display:block;max-width:100%;}

button{font:inherit;color:inherit;background:none;border:0;cursor:pointer;}

a{color:var(--aurora);text-decoration:none;}

h1,h2,h3,h4,h5{
  margin:0;
  font-family:var(--font-display);
  font-weight:800;
  line-height:1.15;
  letter-spacing:-.02em;
  color:var(--ink);
}

p{margin:0;}

ul,ol{margin:0;}

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

section[id],
h2[id],
h3[id]{scroll-margin-top:calc(var(--header-h) + 24px);}

/* ---------- 3. 布局工具 ---------- */
.shell{
  width:100%;
  max-width:var(--shell);
  margin-inline:auto;
  padding-inline:var(--gutter);
}

.visually-hidden{
  position:absolute;
  width:1px;height:1px;
  margin:-1px;padding:0;
  overflow:hidden;
  clip:rect(0 0 0 0);
  white-space:nowrap;
  border:0;
}

.section{padding-block:clamp(48px,7vw,96px);position:relative;}
.section--tight{padding-block:clamp(30px,4.4vw,58px);}

.stack{display:grid;gap:clamp(14px,1.8vw,22px);}

/* ---------- 4. 标题组 ---------- */
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:9px;
  font-family:var(--font-mono);
  font-size:12px;
  font-weight:600;
  letter-spacing:.16em;
  text-transform:uppercase;
  color:var(--aurora);
}
.eyebrow::before{
  content:"";
  width:22px;height:2px;
  border-radius:2px;
  background:linear-gradient(90deg,var(--maple),var(--aurora-cyan));
}

.section-title{
  margin-top:12px;
  font-size:clamp(26px,3.2vw,34px);
}

.section-lead{
  margin-top:14px;
  max-width:62ch;
  font-size:16.5px;
  color:var(--slate);
}

/* ---------- 5. 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:9px;
  min-height:48px;
  padding:0 24px;
  border:1px solid transparent;
  border-radius:999px;
  font-family:var(--font-display);
  font-size:15px;
  font-weight:700;
  letter-spacing:.06em;
  white-space:nowrap;
  transition:transform var(--dur) var(--ease),background-color var(--dur) var(--ease),border-color var(--dur) var(--ease),box-shadow var(--dur) var(--ease),color var(--dur) var(--ease);
}
.btn:hover{transform:translateY(-3px);}
.btn:active{transform:translateY(-1px);}

.btn--primary{
  background:var(--aurora);
  color:#fff;
  box-shadow:0 8px 22px rgba(14,111,224,.30);
}
.btn--primary:hover{background:#0a5cbb;box-shadow:0 14px 30px rgba(14,111,224,.34);}

.btn--accent{
  background:var(--maple);
  color:#fff;
  box-shadow:0 8px 22px rgba(214,40,40,.28);
}
.btn--accent:hover{background:var(--maple-soft);box-shadow:0 14px 30px rgba(214,40,40,.32);}

.btn--ghost{
  background:transparent;
  border-color:var(--frost);
  color:var(--aurora-deep);
}
.btn--ghost:hover{border-color:var(--aurora-light);background:rgba(99,180,255,.10);}

/* ---------- 6. 卡片 ---------- */
.card{
  display:block;
  position:relative;
  background:#fff;
  border:1px solid var(--frost);
  border-radius:var(--radius-lg);
  padding:clamp(20px,2.4vw,28px);
  box-shadow:var(--shadow-1);
  transition:transform var(--dur) var(--ease),border-color var(--dur) var(--ease),box-shadow var(--dur) var(--ease);
}
.card:hover,
.card:focus-visible{
  transform:translateY(-4px);
  border-color:var(--aurora-light);
  box-shadow:var(--shadow-2);
}

.card--glass{
  background:var(--glass);
  border-color:rgba(255,255,255,.72);
  -webkit-backdrop-filter:blur(14px) saturate(140%);
  backdrop-filter:blur(14px) saturate(140%);
}

.card--ink{
  background:var(--aurora-deep);
  border-color:rgba(99,180,255,.24);
  color:rgba(247,250,255,.78);
}
.card--ink h2,
.card--ink h3,
.card--ink h4{color:#fff;}

/* ---------- 7. Bento 网格 ---------- */
.bento{
  display:grid;
  grid-template-columns:repeat(12,1fr);
  gap:clamp(16px,2vw,26px);
}
.bento__cell{grid-column:span 4;min-width:0;display:flex;flex-direction:column;}
.bento__cell--half{grid-column:span 6;}
.bento__cell--wide{grid-column:span 8;}
.bento__cell--full{grid-column:span 12;}
.bento__cell--tall{grid-row:span 2;}

@media (max-width:1024px){
  .bento__cell,
  .bento__cell--half,
  .bento__cell--wide,
  .bento__cell--full{grid-column:span 6;}
  .bento__cell--tall{grid-row:auto;}
}
@media (max-width:640px){
  .bento__cell,
  .bento__cell--half,
  .bento__cell--wide,
  .bento__cell--full{grid-column:span 12;}
}

/* ---------- 8. Chips ---------- */
.chip-group{
  display:flex;
  flex-wrap:wrap;
  gap:10px;
}
.chip{
  display:inline-flex;
  align-items:center;
  height:36px;
  padding:0 16px;
  border-radius:999px;
  border:1px solid var(--frost);
  background:#fff;
  font-family:var(--font-display);
  font-size:14px;
  font-weight:600;
  letter-spacing:.04em;
  color:var(--slate);
  transition:background-color var(--dur) var(--ease),color var(--dur) var(--ease),border-color var(--dur) var(--ease);
}
.chip:hover{border-color:var(--aurora-light);color:var(--aurora);}
.chip[aria-pressed="true"],
.chip--active{
  background:var(--maple);
  border-color:var(--maple);
  color:#fff;
}

/* ---------- 9. 面包屑 ---------- */
.breadcrumb{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:9px;
  padding:0;
  list-style:none;
  font-size:13.5px;
  color:var(--slate);
}
.breadcrumb a{color:var(--slate);transition:color var(--dur) var(--ease);}
.breadcrumb a:hover{color:var(--aurora);}
.breadcrumb__sep{color:var(--frost);}

/* ---------- 10. 正文 ---------- */
.prose{max-width:72ch;}
.prose h2{
  margin-top:2.2em;
  margin-bottom:.5em;
  font-size:clamp(22px,2.6vw,28px);
}
.prose h3{
  margin-top:1.8em;
  margin-bottom:.45em;
  font-size:19px;
}
.prose p{margin-bottom:1.1em;}
.prose ul,
.prose ol{margin:0 0 1.1em;padding-left:1.35em;}
.prose li{margin-bottom:.45em;}
.prose a{
  text-decoration:underline;
  text-decoration-thickness:1px;
  text-underline-offset:3px;
}
.prose strong{font-weight:700;color:var(--ink);}
.prose code{
  font-family:var(--font-mono);
  font-size:.92em;
  background:rgba(99,180,255,.14);
  border-radius:6px;
  padding:.1em .45em;
}

/* ---------- 11. 媒体容器（页面阶段放图 / SVG） ---------- */
.media-frame{
  position:relative;
  display:block;
  width:100%;
  overflow:hidden;
  border-radius:var(--radius-lg);
  border:1px solid var(--frost);
  background:
    radial-gradient(120% 100% at 12% 0%,rgba(79,227,208,.28),transparent 58%),
    radial-gradient(120% 110% at 90% 8%,rgba(14,111,224,.30),transparent 62%),
    linear-gradient(140deg,rgba(14,111,224,.10),rgba(247,250,255,.9));
  aspect-ratio:16 / 10;
}
.media-frame > img,
.media-frame > svg,
.media-frame > picture,
.media-frame > picture > img{
  width:100%;
  height:100%;
  object-fit:cover;
}
.media-frame--16x9{aspect-ratio:16 / 9;}
.media-frame--4x3{aspect-ratio:4 / 3;}
.media-frame--1x1{aspect-ratio:1 / 1;}
.media-frame--tall{aspect-ratio:3 / 4;}
.media-frame--banner{aspect-ratio:21 / 9;}
.media-frame--fill{aspect-ratio:auto;height:100%;min-height:220px;}
.media-frame--glass{
  background:var(--glass);
  -webkit-backdrop-filter:blur(12px);
  backdrop-filter:blur(12px);
}

/* ---------- 12. 数字指标 ---------- */
.stat{display:flex;flex-direction:column;gap:2px;}
.stat__value{
  font-family:var(--font-mono);
  font-size:clamp(30px,4vw,44px);
  font-weight:700;
  line-height:1.05;
  letter-spacing:-.02em;
  color:var(--aurora);
}
.stat__label{
  font-size:13.5px;
  color:var(--slate);
  letter-spacing:.02em;
}

/* ---------- 13. 标签 ---------- */
.tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  height:26px;
  padding:0 11px;
  border-radius:7px;
  background:rgba(214,40,40,.11);
  color:var(--maple);
  font-family:var(--font-mono);
  font-size:12px;
  font-weight:600;
  letter-spacing:.05em;
  white-space:nowrap;
}
.tag--cyan{background:rgba(79,227,208,.16);color:#0b7a70;}
.tag--blue{background:rgba(14,111,224,.12);color:var(--aurora);}

/* ---------- 14. 滚动显现 ---------- */
[data-reveal]{transition:opacity .5s var(--ease),transform .5s var(--ease);}
.js-reveal [data-reveal]{opacity:0;transform:translateY(12px);}
.js-reveal [data-reveal].is-visible{opacity:1;transform:none;}

/* ---------- 15. 顶栏 ---------- */
.skip-link{
  position:fixed;
  top:-120px;
  left:var(--gutter);
  z-index:200;
  padding:11px 18px;
  border-radius:0 0 var(--radius-sm) var(--radius-sm);
  background:var(--ink);
  color:#fff;
  font-family:var(--font-display);
  font-size:14px;
  font-weight:600;
  letter-spacing:.05em;
  transition:top var(--dur) var(--ease);
}
.skip-link:focus{top:0;color:#fff;}

.site-header{
  position:fixed;
  inset:0 0 auto 0;
  z-index:100;
  background:rgba(247,250,255,.74);
  border-bottom:1px solid var(--frost);
  -webkit-backdrop-filter:blur(16px) saturate(150%);
  backdrop-filter:blur(16px) saturate(150%);
  transition:background-color .25s var(--ease),border-color .25s var(--ease),box-shadow .25s var(--ease);
}
.site-header[data-scrolled]{
  background:var(--glass-strong);
  border-bottom-color:rgba(99,180,255,.55);
  box-shadow:0 8px 26px rgba(6,42,84,.10);
}

.site-header__inner{
  display:flex;
  align-items:center;
  gap:clamp(14px,3vw,40px);
  width:100%;
  max-width:var(--shell);
  min-height:var(--header-h);
  margin-inline:auto;
  padding-inline:var(--gutter);
  transition:min-height .25s var(--ease);
}
.site-header[data-scrolled] .site-header__inner{min-height:var(--header-h-scrolled);}

/* 品牌 */
.brand{
  display:flex;
  align-items:center;
  gap:12px;
  flex:0 0 auto;
  color:var(--ink);
}
.brand__mark{
  position:relative;
  flex:0 0 auto;
  width:38px;
  height:38px;
  border-radius:12px;
  background:conic-gradient(from 205deg,var(--aurora) 0deg,var(--aurora-cyan) 96deg,var(--aurora-light) 200deg,var(--aurora-deep) 320deg,var(--aurora) 360deg);
  box-shadow:0 5px 16px rgba(14,111,224,.34);
}
.brand__mark::after{
  content:"";
  position:absolute;
  inset:7px;
  background:var(--ice);
  opacity:.95;
  clip-path:polygon(50% 0,61% 32%,96% 29%,70% 51%,88% 89%,50% 68%,12% 89%,30% 51%,4% 29%,39% 32%);
}
.brand__text{
  display:flex;
  flex-direction:column;
  line-height:1.18;
  min-width:0;
}
.brand__name{
  font-family:var(--font-display);
  font-size:19px;
  font-weight:800;
  letter-spacing:-.01em;
  color:var(--ink);
}
.brand__tag{
  font-size:11.5px;
  font-weight:500;
  letter-spacing:.07em;
  color:var(--slate);
  white-space:nowrap;
}

/* 抽屉按钮 */
.nav-toggle{
  display:none;
  margin-left:auto;
  width:44px;
  height:44px;
  flex:0 0 auto;
  flex-direction:column;
  align-items:center;
  justify-content:center;
  gap:5px;
  border-radius:12px;
  border:1px solid var(--frost);
  background:var(--glass);
  transition:border-color var(--dur) var(--ease),background-color var(--dur) var(--ease);
}
.nav-toggle:hover{border-color:var(--aurora-light);}
.nav-toggle__bar{
  display:block;
  width:20px;
  height:2px;
  border-radius:2px;
  background:var(--aurora-deep);
  transition:transform .2s var(--ease),opacity .2s var(--ease);
}
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(1){transform:translateY(7px) rotate(45deg);}
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(2){opacity:0;}
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(3){transform:translateY(-7px) rotate(-45deg);}

/* 导航 */
.site-nav{
  display:flex;
  align-items:center;
  gap:clamp(10px,1.8vw,28px);
  margin-left:auto;
}
.site-nav__list{
  display:flex;
  align-items:center;
  gap:clamp(6px,1.4vw,22px);
  list-style:none;
  margin:0;
  padding:0;
}
.site-nav__item{display:flex;}
.site-nav__link{
  position:relative;
  display:inline-flex;
  align-items:center;
  height:38px;
  padding:0 2px;
  font-family:var(--font-display);
  font-size:15px;
  font-weight:600;
  letter-spacing:.03em;
  color:var(--ink);
  transition:color var(--dur) var(--ease);
}
.site-nav__link::after{
  content:"";
  position:absolute;
  left:0;right:0;bottom:3px;
  height:2px;
  border-radius:2px;
  background:linear-gradient(90deg,var(--aurora-cyan),var(--aurora));
  transform:scaleX(0);
  transform-origin:left center;
  transition:transform .22s var(--ease);
}
.site-nav__link:hover{color:var(--aurora);}
.site-nav__link:hover::after{transform:scaleX(1);}
.site-nav__link[aria-current="page"]{color:var(--aurora-deep);}
.site-nav__link[aria-current="page"]::after{
  transform:scaleX(1);
  background:var(--aurora-cyan);
}

.site-nav__cta{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  height:40px;
  padding:0 20px;
  border-radius:999px;
  background:var(--maple);
  color:#fff;
  font-family:var(--font-display);
  font-size:14.5px;
  font-weight:700;
  letter-spacing:.06em;
  white-space:nowrap;
  box-shadow:0 6px 18px rgba(214,40,40,.28);
  transition:background-color var(--dur) var(--ease),transform var(--dur) var(--ease),box-shadow var(--dur) var(--ease);
}
.site-nav__cta:hover{
  background:var(--maple-soft);
  color:#fff;
  transform:translateY(-2px);
  box-shadow:0 12px 26px rgba(214,40,40,.32);
}

/* 滚动进度线 */
.scroll-progress{
  position:absolute;
  left:0;right:0;bottom:0;
  display:block;
  height:2px;
  transform:scaleX(0);
  transform-origin:left center;
  background:linear-gradient(90deg,var(--aurora-cyan),var(--aurora) 55%,var(--maple));
  will-change:transform;
}

/* ---------- 16. 页脚 ---------- */
.site-footer{
  position:relative;
  isolation:isolate;
  margin-top:clamp(56px,8vw,110px);
  background-color:var(--aurora-deep);
  color:rgba(247,250,255,.78);
  overflow:hidden;
}
.site-footer::before{
  content:"";
  position:absolute;
  inset:0;
  z-index:-1;
  background-image:
    radial-gradient(120% 92% at 8% 0%,rgba(79,227,208,.22),transparent 56%),
    radial-gradient(96% 84% at 92% 4%,rgba(14,111,224,.52),transparent 60%),
    repeating-linear-gradient(58deg,rgba(99,180,255,.10) 0 1px,transparent 1px 30px),
    repeating-linear-gradient(-58deg,rgba(99,180,255,.075) 0 1px,transparent 1px 30px);
}
.site-footer::after{
  content:"";
  position:absolute;
  left:0;right:0;top:0;
  height:3px;
  background:linear-gradient(90deg,var(--aurora-cyan),var(--aurora) 48%,var(--maple));
}

.site-footer__inner{
  position:relative;
  width:100%;
  max-width:var(--shell);
  margin-inline:auto;
  padding:clamp(40px,6vw,72px) var(--gutter) 0;
}

.footer-grid{
  display:grid;
  grid-template-columns:1.5fr 1fr 1fr 1.5fr;
  gap:clamp(22px,3.4vw,48px);
}

.footer-col{min-width:0;}

.footer-col__title{
  position:relative;
  margin:0 0 18px;
  padding-bottom:10px;
  font-family:var(--font-display);
  font-size:13px;
  font-weight:700;
  letter-spacing:.12em;
  color:#fff;
}
.footer-col__title::after{
  content:"";
  position:absolute;
  left:0;bottom:0;
  width:26px;height:2px;
  border-radius:2px;
  background:linear-gradient(90deg,var(--aurora-cyan),transparent);
}

.footer-brand{
  display:flex;
  align-items:center;
  gap:12px;
  margin-bottom:16px;
}
.footer-brand .brand__name{color:#fff;}
.footer-brand .brand__tag{color:rgba(247,250,255,.62);}
.footer-brand .brand__mark{box-shadow:0 0 0 1px rgba(99,180,255,.35);}

.footer-icp{
  font-family:var(--font-mono);
  font-size:13.5px;
  letter-spacing:.02em;
  color:rgba(247,250,255,.6);
}

.footer-list{
  list-style:none;
  margin:0;
  padding:0;
  display:grid;
  gap:9px;
}
.footer-list a{
  display:inline-block;
  font-size:15px;
  color:rgba(247,250,255,.76);
  transition:color var(--dur) var(--ease),padding-left var(--dur) var(--ease);
}
.footer-list a:hover{
  color:#fff;
  padding-left:5px;
}

.footer-contact{
  list-style:none;
  margin:0;
  padding:0;
  display:grid;
  gap:12px;
  font-size:14.5px;
}
.footer-contact li{line-height:1.6;}
.footer-contact__label{
  display:block;
  margin-bottom:3px;
  font-family:var(--font-mono);
  font-size:11px;
  font-weight:600;
  letter-spacing:.16em;
  text-transform:uppercase;
  color:var(--aurora-cyan);
}
.footer-contact__value{
  font-family:var(--font-mono);
  font-size:14.5px;
  letter-spacing:.01em;
  color:#fff;
  word-break:break-all;
}
.footer-contact__address{
  color:rgba(247,250,255,.82);
  font-size:14.5px;
  line-height:1.7;
}

.copy-btn{
  display:inline-flex;
  align-items:center;
  height:24px;
  margin-left:8px;
  padding:0 10px;
  vertical-align:middle;
  border-radius:6px;
  border:1px solid rgba(99,180,255,.42);
  background:rgba(99,180,255,.14);
  color:#C7E2FF;
  font-family:var(--font-body);
  font-size:12px;
  font-weight:600;
  letter-spacing:.06em;
  transition:background-color var(--dur) var(--ease),color var(--dur) var(--ease),border-color var(--dur) var(--ease);
}
.copy-btn:hover{
  background:rgba(99,180,255,.26);
  border-color:rgba(99,180,255,.72);
  color:#fff;
}
.copy-btn.is-copied{
  background:rgba(79,227,208,.22);
  border-color:rgba(79,227,208,.62);
  color:#8FFFF0;
}

.footer-bottom{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:12px 26px;
  margin-top:clamp(32px,4vw,52px);
  padding:20px 0 26px;
  border-top:1px solid rgba(99,180,255,.22);
  font-size:13px;
  color:rgba(247,250,255,.55);
}
.footer-bottom__meta{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
}
.footer-bottom a{color:rgba(247,250,255,.7);transition:color var(--dur) var(--ease);}
.footer-bottom a:hover{color:#fff;}
.footer-bottom__sep{color:rgba(99,180,255,.45);}

/* ---------- 17. 响应式 ---------- */
@media (max-width:1024px){
  .footer-grid{grid-template-columns:1fr 1fr;}
}

@media (max-width:960px){
  .nav-toggle{display:inline-flex;}

  .site-nav{
    position:absolute;
    top:100%;
    left:0;
    right:0;
    display:block;
    margin-left:0;
    padding:16px var(--gutter) 24px;
    background:var(--glass-strong);
    border-bottom:1px solid var(--frost);
    box-shadow:var(--shadow-2);
    -webkit-backdrop-filter:blur(18px) saturate(150%);
    backdrop-filter:blur(18px) saturate(150%);
    max-height:calc(100vh - var(--header-h));
    overflow-y:auto;
    opacity:0;
    visibility:hidden;
    pointer-events:none;
    transform:translateY(-10px);
    transition:opacity .22s var(--ease),transform .22s var(--ease),visibility .22s;
  }
  .site-nav[data-open]{
    opacity:1;
    visibility:visible;
    pointer-events:auto;
    transform:none;
  }
  .site-nav__list{
    flex-direction:column;
    align-items:stretch;
    gap:0;
  }
  .site-nav__item{display:block;}
  .site-nav__link{
    width:100%;
    height:50px;
    font-size:16px;
    border-bottom:1px solid var(--frost);
  }
  .site-nav__link::after{display:none;}
  .site-nav__link[aria-current="page"]{color:var(--aurora);}
  .site-nav__cta{
    width:100%;
    height:50px;
    margin-top:16px;
    font-size:15px;
  }
}

@media (max-width:620px){
  .footer-grid{grid-template-columns:1fr;}
  .footer-bottom{justify-content:flex-start;}
}

@media (max-width:480px){
  .brand__tag{display:none;}
  .brand__mark{width:34px;height:34px;border-radius:10px;}
  .brand__name{font-size:17px;}
  .copy-btn{margin-left:6px;}
}

/* ---------- 18. 降低动态效果 ---------- */
@media (prefers-reduced-motion:reduce){
  *,
  *::before,
  *::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
    scroll-behavior:auto !important;
  }
  .js-reveal [data-reveal]{opacity:1;transform:none;}
  .scroll-progress{transition:none;}
}