/* ============================================================
   HOPOO 站 · 共享样式 /assets/site.css
   墨蓝骨架 + 暖沙底 + 橘红档位 + 青绿库存
   ============================================================ */

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

html{
  -webkit-text-size-adjust:100%;
  scroll-padding-top:calc(var(--header-h) + 16px);
}

:root{
  --ink-900:#0F2333;
  --ink-700:#173A56;
  --ink-400:#5C7E9B;
  --ink-200:#AFC2D1;
  --sand-300:#E7DBC5;
  --sand-100:#F6F2E9;
  --paper:#FFFDF8;
  --flame:#E2502A;
  --flame-deep:#C0401C;
  --jade:#2E9C7E;
  --jade-deep:#1C6B58;

  --font-display:"Noto Serif SC","Source Han Serif SC","Songti SC",Georgia,"SimSun",serif;
  --font-body:"Noto Sans SC","Source Han Sans SC","PingFang SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --font-num:"Archivo Narrow","Oswald","Arial Narrow","Helvetica Neue",system-ui,sans-serif;

  --fs-12:0.75rem;
  --fs-14:0.875rem;
  --fs-16:1rem;
  --fs-20:1.25rem;
  --fs-26:1.625rem;
  --fs-36:2.25rem;
  --fs-56:3.5rem;
  --fs-96:6rem;

  --gutter:clamp(18px,5vw,56px);
  --shell:1240px;
  --header-h:112px;
  --radius:3px;
  --radius-lg:6px;
  --ease:cubic-bezier(.2,.7,.3,1);
  --shadow-soft:0 18px 40px -30px rgba(15,35,51,.55);
}

/* ---------- 基础排版 ---------- */
body{
  margin:0;
  background:var(--sand-100);
  color:var(--ink-900);
  font-family:var(--font-body);
  font-size:16px;
  font-weight:400;
  line-height:1.9;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}

h1,h2,h3,h4,h5,h6{
  font-family:var(--font-display);
  font-weight:600;
  line-height:1.25;
  letter-spacing:0;
  color:inherit;
  margin:0 0 .6em;
}
h1{font-size:clamp(2.2rem,5.2vw,3.5rem);}
h2{font-size:clamp(1.75rem,3.2vw,2.6rem);}
h3{font-size:clamp(1.25rem,2vw,1.625rem);}
h4{font-size:1.125rem;}

p{margin:0 0 1.1em;}
ul,ol{margin:0 0 1.1em;padding-left:1.25em;}
li{margin:.35em 0;}
strong,b{font-weight:600;}
small{font-size:var(--fs-12);}
hr{border:0;border-top:1px solid rgba(23,58,86,.16);margin:2em 0;}

a{color:var(--ink-700);text-decoration:none;transition:color .2s var(--ease);}
a:hover{color:var(--flame-deep);}

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

::selection{background:var(--flame);color:var(--paper);}

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

/* ---------- 跳转链接 ---------- */
.skip-link{
  position:fixed;
  top:8px;
  left:8px;
  z-index:200;
  transform:translateY(-180%);
  background:var(--paper);
  color:var(--ink-900);
  font-size:var(--fs-14);
  font-weight:600;
  letter-spacing:.02em;
  padding:10px 16px;
  border-radius:var(--radius);
  box-shadow:var(--shadow-soft);
  transition:transform .2s var(--ease);
}
.skip-link:focus-visible{transform:none;}

/* ---------- 头部 ---------- */
.site-header{
  position:fixed;
  top:0;
  left:0;
  right:0;
  z-index:100;
  color:var(--paper);
  background:var(--ink-700);
  box-shadow:0 14px 32px -28px rgba(15,35,51,.95);
  transition:background-color .24s ease-out,box-shadow .24s ease-out;
}
.site-header[data-stuck="false"]{
  background:transparent;
  box-shadow:none;
}

.header-rail{
  background:rgba(15,35,51,.42);
  border-bottom:1px solid rgba(255,253,248,.14);
  transition:background-color .24s ease-out,border-color .24s ease-out;
}
.site-header[data-stuck="false"] .header-rail{
  background:rgba(15,35,51,.34);
  border-bottom-color:rgba(255,253,248,.12);
}

.rail-inner{
  width:100%;
  max-width:var(--shell);
  margin-inline:auto;
  padding:0 var(--gutter);
  min-height:34px;
  display:flex;
  align-items:center;
  gap:14px;
  font-size:var(--fs-12);
  line-height:1.6;
}
.rail-label{
  color:rgba(175,194,209,.86);
  letter-spacing:.16em;
  flex:none;
}
.rail-list{
  display:flex;
  align-items:center;
  gap:4px;
  list-style:none;
  margin:0;
  padding:0;
}
.rail-item{margin:0;}
.rail-link{
  display:inline-block;
  padding:5px 10px;
  color:rgba(246,242,233,.82);
  font-size:var(--fs-12);
  font-weight:600;
  letter-spacing:.04em;
  border:1px solid transparent;
  border-radius:var(--radius);
  transition:color .2s var(--ease),border-color .2s var(--ease),background-color .2s var(--ease);
}
.rail-link:hover{
  color:var(--paper);
  border-color:rgba(226,80,42,.65);
  background:rgba(226,80,42,.16);
}
.rail-meta{
  margin-left:auto;
  color:rgba(175,194,209,.8);
  letter-spacing:.02em;
  flex:none;
}

.header-inner{
  width:100%;
  max-width:var(--shell);
  margin-inline:auto;
  padding:0 var(--gutter);
  min-height:78px;
  display:flex;
  align-items:center;
  gap:clamp(12px,2.4vw,36px);
}

.brand{
  display:inline-flex;
  align-items:baseline;
  gap:10px;
  flex:none;
  color:var(--paper);
  text-decoration:none;
}
.brand:hover{color:var(--paper);}
.brand-mark{
  font-family:var(--font-num);
  font-size:var(--fs-26);
  font-weight:700;
  letter-spacing:.14em;
  line-height:1;
}
.brand-line{
  font-size:var(--fs-12);
  letter-spacing:.08em;
  color:rgba(175,194,209,.92);
  white-space:nowrap;
}

.site-nav{margin-left:auto;}
.nav-list{
  display:flex;
  align-items:center;
  gap:clamp(10px,1.6vw,22px);
  list-style:none;
  margin:0;
  padding:0;
}
.nav-item{margin:0;}
.nav-link{
  position:relative;
  display:inline-block;
  padding:6px 2px 10px;
  font-size:var(--fs-14);
  font-weight:500;
  letter-spacing:.02em;
  color:rgba(255,253,248,.82);
  text-decoration:none;
  white-space:nowrap;
  transition:color .2s var(--ease);
}
.nav-link::after{
  content:"";
  position:absolute;
  left:0;
  right:100%;
  bottom:4px;
  height:2px;
  background:var(--flame);
  transition:right .24s var(--ease);
}
.nav-link:hover{color:var(--paper);}
.nav-link:hover::after{right:0;}
.nav-link[aria-current="page"]{color:var(--paper);font-weight:600;}
.nav-link[aria-current="page"]::after{right:0;}

.header-tools{
  display:flex;
  align-items:center;
  gap:12px;
  flex:none;
}

.nav-toggle{
  display:none;
  align-items:center;
  gap:9px;
  background:transparent;
  border:1px solid rgba(255,253,248,.36);
  border-radius:var(--radius);
  color:var(--paper);
  font-family:var(--font-body);
  font-size:13px;
  font-weight:600;
  letter-spacing:.06em;
  padding:8px 12px;
  cursor:pointer;
  transition:border-color .2s var(--ease),background-color .2s var(--ease);
}
.nav-toggle:hover{border-color:var(--flame);background:rgba(226,80,42,.18);}
.nav-toggle-icon{
  position:relative;
  display:block;
  width:18px;
  height:12px;
}
.nav-toggle-icon::before,
.nav-toggle-icon::after{
  content:"";
  position:absolute;
  left:0;
  right:0;
  height:2px;
  background:currentColor;
  transition:transform .24s var(--ease),top .24s var(--ease);
}
.nav-toggle-icon::before{top:0;}
.nav-toggle-icon::after{top:10px;}
.nav-toggle[aria-expanded="true"] .nav-toggle-icon::before{top:5px;transform:rotate(45deg);}
.nav-toggle[aria-expanded="true"] .nav-toggle-icon::after{top:5px;transform:rotate(-45deg);}

.scroll-progress{
  position:absolute;
  left:0;
  bottom:0;
  height:2px;
  width:0;
  background:var(--flame);
  transition:width .12s linear;
  pointer-events:none;
}

/* ---------- 页脚 ---------- */
.site-footer{
  background:var(--ink-900);
  color:var(--sand-300);
  padding:clamp(46px,7vw,88px) 0 0;
}
.footer-top{
  width:100%;
  max-width:var(--shell);
  margin-inline:auto;
  padding:0 var(--gutter);
  display:grid;
  grid-template-columns:minmax(0,.92fr) minmax(0,1.6fr);
  gap:clamp(30px,5vw,72px);
}
.footer-mark{
  display:block;
  font-family:var(--font-num);
  font-size:var(--fs-26);
  font-weight:700;
  letter-spacing:.16em;
  line-height:1;
  color:var(--paper);
}
.footer-line{
  margin:18px 0 0;
  max-width:36ch;
  font-size:var(--fs-14);
  line-height:1.95;
  color:rgba(231,219,197,.8);
}
.footer-address{
  margin-top:14px;
  font-style:normal;
  font-size:13px;
  line-height:1.8;
  color:rgba(175,194,209,.82);
}
.footer-grid{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:clamp(18px,3vw,40px);
}
.footer-col{min-width:0;}
.footer-col-title{
  margin:0 0 14px;
  font-family:var(--font-body);
  font-size:var(--fs-12);
  font-weight:600;
  letter-spacing:.18em;
  color:rgba(175,194,209,.92);
}
.footer-links{
  list-style:none;
  margin:0;
  padding:0;
  display:grid;
  gap:10px;
}
.footer-links--plain{gap:6px;}
.footer-link{
  display:inline-block;
  font-size:var(--fs-14);
  color:rgba(246,242,233,.86);
  padding-bottom:2px;
  border-bottom:1px solid transparent;
  transition:color .2s var(--ease),border-color .2s var(--ease);
}
.footer-link:hover{
  color:var(--paper);
  border-bottom-color:var(--flame);
}
.footer-text{
  font-size:13px;
  letter-spacing:.03em;
  color:rgba(246,242,233,.86);
}
.footer-contact-line{
  margin:14px 0 0;
  font-size:13px;
  line-height:1.85;
  color:rgba(175,194,209,.78);
}
.footer-bottom{
  width:100%;
  max-width:var(--shell);
  margin:clamp(32px,5vw,56px) auto 0;
  padding:18px var(--gutter) 26px;
  border-top:1px solid rgba(175,194,209,.2);
  display:flex;
  flex-wrap:wrap;
  justify-content:space-between;
  gap:8px 26px;
  font-size:var(--fs-12);
  letter-spacing:.02em;
  color:rgba(175,194,209,.76);
}
.footer-legal,
.footer-copy{margin:0;}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  font-family:var(--font-body);
  font-size:var(--fs-14);
  font-weight:600;
  letter-spacing:.04em;
  line-height:1.4;
  padding:11px 20px;
  border:1px solid transparent;
  border-radius:var(--radius);
  text-decoration:none;
  cursor:pointer;
  transition:background-color .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease),transform .2s var(--ease);
}
.btn:hover{transform:translateY(-1px);}
.btn-cta{background:var(--flame);color:var(--paper);border-color:var(--flame);}
.btn-cta:hover{background:var(--flame-deep);border-color:var(--flame-deep);color:var(--paper);}
.btn-primary{background:var(--ink-700);color:var(--paper);border-color:var(--ink-700);}
.btn-primary:hover{background:var(--ink-900);border-color:var(--ink-900);color:var(--paper);}
.btn-quiet{background:transparent;color:var(--ink-700);border-color:rgba(23,58,86,.3);}
.btn-quiet:hover{border-color:var(--flame);color:var(--flame-deep);}
.btn-ghost{background:transparent;color:var(--paper);border-color:rgba(255,253,248,.4);}
.btn-ghost:hover{border-color:var(--flame);background:rgba(226,80,42,.24);color:var(--paper);}

/* ---------- 布局容器 ---------- */
.shell{
  width:100%;
  max-width:var(--shell);
  margin-inline:auto;
  padding-inline:var(--gutter);
}
.page-body{
  padding-top:calc(var(--header-h) + clamp(28px,5vw,72px));
  padding-bottom:clamp(48px,7vw,96px);
}

/* ---------- 面包屑 ---------- */
.breadcrumb{padding-bottom:18px;}
.breadcrumb-list{
  list-style:none;
  margin:0;
  padding:0;
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:0;
  font-size:13px;
  color:var(--ink-400);
}
.breadcrumb-item{
  margin:0;
  display:inline-flex;
  align-items:center;
}
.breadcrumb-item + .breadcrumb-item::before{
  content:"/";
  margin:0 9px;
  color:var(--ink-200);
}
.breadcrumb-link{
  color:var(--ink-700);
  border-bottom:1px solid rgba(23,58,86,.22);
  padding-bottom:1px;
}
.breadcrumb-link:hover{color:var(--flame-deep);border-bottom-color:var(--flame);}
.breadcrumb-current{color:var(--ink-900);font-weight:600;}

/* ---------- 区块 ---------- */
.hp-section{
  padding:clamp(40px,7vw,96px) 0;
}
.hp-section--sand{background:var(--sand-300);}
.hp-section--ink{background:var(--ink-900);color:var(--sand-100);}
.hp-section--ink .hp-lede{color:rgba(246,242,233,.82);}
.hp-section--ink .hp-meta{color:rgba(175,194,209,.88);}
.hp-section--ink .hp-eyebrow{color:var(--sand-300);}

.hp-hero{
  position:relative;
  overflow:hidden;
  background:var(--ink-900);
  color:var(--sand-100);
  padding:calc(var(--header-h) + clamp(46px,9vw,112px)) 0 clamp(56px,9vw,124px);
}

/* ---------- 分屏 ---------- */
.hp-split{
  display:grid;
  grid-template-columns:minmax(0,58fr) minmax(0,42fr);
  gap:clamp(24px,4vw,64px);
  align-items:start;
}
.hp-split--wide{
  grid-template-columns:minmax(0,64fr) minmax(0,36fr);
}
.hp-main,
.hp-aside,
.hp-rail{min-width:0;}

/* ---------- 内容块 ---------- */
.hp-panel,
.hp-card{
  background:var(--paper);
  border:1px solid rgba(23,58,86,.14);
  border-radius:var(--radius-lg);
  padding:clamp(18px,3vw,32px);
}
.hp-card{padding:clamp(16px,2.2vw,22px);}
.hp-glass{
  background:linear-gradient(180deg,rgba(255,253,248,.74),rgba(231,219,197,.44));
  border:1px solid rgba(23,58,86,.14);
  border-radius:var(--radius-lg);
  padding:clamp(16px,2.4vw,24px);
  box-shadow:var(--shadow-soft);
}

.hp-eyebrow{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-size:var(--fs-12);
  font-weight:600;
  letter-spacing:.2em;
  color:var(--flame-deep);
  margin-bottom:14px;
}
.hp-eyebrow::before{
  content:"";
  width:24px;
  height:2px;
  background:var(--flame);
  flex:none;
}
.hp-display{
  font-family:var(--font-display);
  font-size:clamp(2.4rem,6vw,4.5rem);
  font-weight:600;
  line-height:1.12;
  margin:0 0 .5em;
}
.hp-title{
  font-family:var(--font-display);
  font-size:clamp(1.6rem,3.2vw,2.6rem);
  font-weight:600;
  line-height:1.2;
  margin:0 0 .5em;
}
.hp-lede{
  font-size:clamp(1rem,1.4vw,1.25rem);
  line-height:1.9;
  color:var(--ink-700);
  max-width:52ch;
  margin:0 0 1.1em;
}
.hp-meta{
  font-size:13px;
  line-height:1.8;
  color:var(--ink-400);
  margin:0 0 .8em;
}
.hp-num{
  display:inline-block;
  font-family:var(--font-num);
  font-size:clamp(3.5rem,7vw,7rem);
  font-weight:700;
  line-height:.92;
  letter-spacing:-.02em;
  color:var(--flame);
}
.hp-num--sm{font-size:clamp(2rem,3.4vw,3.5rem);}
.hp-unit{
  font-family:var(--font-body);
  font-size:var(--fs-14);
  font-weight:600;
  letter-spacing:.04em;
  color:var(--ink-700);
  margin-left:8px;
  vertical-align:baseline;
}

/* ---------- 标签 ---------- */
.hp-tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  font-size:var(--fs-12);
  font-weight:600;
  letter-spacing:.06em;
  line-height:1.6;
  padding:4px 10px;
  border:1px solid transparent;
  border-radius:999px;
  white-space:nowrap;
}
.hp-tag--ink{
  color:var(--ink-700);
  border-color:rgba(23,58,86,.3);
  background:rgba(175,194,209,.2);
}
.hp-tag--flame{
  color:var(--flame-deep);
  border-color:rgba(192,64,28,.42);
  background:rgba(226,80,42,.12);
}
.hp-tag--jade{
  color:var(--jade-deep);
  border-color:rgba(28,107,88,.44);
  background:rgba(46,156,126,.18);
}

/* ---------- 档位刻度与并置块 ---------- */
.hp-meter{
  display:flex;
  gap:4px;
  align-items:stretch;
  height:10px;
  margin:14px 0;
}
.hp-meter-seg{
  flex:1;
  background:rgba(23,58,86,.14);
  border-radius:1px;
  transition:background-color .24s var(--ease);
}
.hp-meter-seg.is-active{background:var(--flame);}

.hp-tier-grid{
  display:grid;
  grid-template-columns:repeat(auto-fit,minmax(150px,1fr));
  gap:clamp(12px,2vw,20px);
}
.hp-tier{
  display:flex;
  flex-direction:column;
  gap:6px;
  background:var(--paper);
  border:1px solid rgba(23,58,86,.14);
  border-radius:var(--radius-lg);
  padding:18px 16px;
  transition:border-color .24s var(--ease),box-shadow .24s var(--ease);
}
.hp-tier[data-current="true"]{
  border-color:var(--flame);
  box-shadow:inset 0 3px 0 var(--flame);
}
.hp-tier-num{
  font-family:var(--font-num);
  font-size:clamp(1.75rem,3vw,2.6rem);
  font-weight:700;
  line-height:1;
  letter-spacing:-.01em;
  color:var(--flame);
}
.hp-tier-label{
  font-size:var(--fs-12);
  font-weight:600;
  letter-spacing:.1em;
  color:var(--ink-400);
}

/* ---------- 折叠组 ---------- */
.hp-stack{
  border-top:1px solid rgba(23,58,86,.16);
}
.hp-stack-item{
  border-bottom:1px solid rgba(23,58,86,.16);
}
.hp-stack-head{
  position:relative;
  width:100%;
  display:flex;
  align-items:baseline;
  justify-content:space-between;
  gap:16px;
  background:none;
  border:0;
  padding:18px 4px 18px 0;
  text-align:left;
  font-family:var(--font-body);
  font-size:clamp(1rem,1.4vw,1.25rem);
  font-weight:600;
  line-height:1.6;
  color:var(--ink-900);
  cursor:pointer;
  transition:color .2s var(--ease),padding-left .24s var(--ease);
}
.hp-stack-head::before{
  content:"";
  position:absolute;
  left:0;
  top:50%;
  width:0;
  height:2px;
  background:var(--flame);
  transform:translateY(-50%);
  transition:width .24s var(--ease);
}
.hp-stack-head:hover{color:var(--flame-deep);}
.hp-stack-head[aria-expanded="true"]{
  padding-left:18px;
  color:var(--flame-deep);
}
.hp-stack-head[aria-expanded="true"]::before{width:12px;}
.hp-stack-flag{
  flex:none;
  font-family:var(--font-num);
  font-size:var(--fs-14);
  font-weight:700;
  letter-spacing:.08em;
  color:var(--flame);
}
.hp-stack-body{
  height:0;
  overflow:hidden;
  transition:height .3s var(--ease);
}
.hp-stack-inner{
  padding:0 0 22px;
  opacity:0;
  transform:translateY(-6px);
  transition:opacity .24s var(--ease),transform .24s var(--ease);
}
.hp-stack-body[data-open="true"] .hp-stack-inner{
  opacity:1;
  transform:none;
}

/* ---------- 图片容器 ---------- */
.media-frame{
  position:relative;
  overflow:hidden;
  background:var(--sand-300);
  border:1px solid rgba(23,58,86,.14);
  border-radius:var(--radius-lg);
  aspect-ratio:4 / 3;
}
.media-frame img,
.media-frame svg{
  width:100%;
  height:100%;
  object-fit:cover;
}
.media-frame--wide{aspect-ratio:16 / 9;}
.media-frame--tall{aspect-ratio:3 / 4;}
.media-frame[data-empty="true"]::after{
  content:attr(data-label);
  position:absolute;
  inset:auto 14px 12px 14px;
  font-size:var(--fs-12);
  letter-spacing:.06em;
  color:var(--ink-400);
}
.media-cap{
  margin:10px 0 0;
  font-size:var(--fs-12);
  letter-spacing:.02em;
  color:var(--ink-400);
}

/* ---------- 筛选 ---------- */
.filter-bar{
  display:flex;
  flex-wrap:wrap;
  gap:8px;
  padding-bottom:18px;
}
.filter-btn{
  background:var(--sand-300);
  border:1px solid rgba(23,58,86,.16);
  border-radius:999px;
  color:var(--ink-700);
  font-family:var(--font-body);
  font-size:13px;
  font-weight:600;
  letter-spacing:.04em;
  padding:7px 14px;
  cursor:pointer;
  transition:background-color .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease);
}
.filter-btn:hover{border-color:var(--flame);color:var(--flame-deep);}
.filter-btn[aria-pressed="true"]{
  background:var(--ink-700);
  border-color:var(--ink-700);
  color:var(--paper);
}
.filter-item{transition:opacity .24s var(--ease);}

/* ---------- 复制 ---------- */
.copy-field{
  display:flex;
  align-items:center;
  flex-wrap:wrap;
  gap:6px;
}
.copy-chip{
  display:inline-flex;
  align-items:center;
  gap:8px;
  background:var(--paper);
  border:1px dashed rgba(23,58,86,.3);
  border-radius:var(--radius);
  color:var(--ink-900);
  font-family:var(--font-num);
  font-size:15px;
  font-weight:700;
  letter-spacing:.03em;
  padding:8px 12px;
  cursor:pointer;
  transition:border-color .2s var(--ease),color .2s var(--ease);
}
.copy-chip:hover{border-color:var(--flame);color:var(--flame-deep);}
.copy-hint{
  font-size:var(--fs-12);
  letter-spacing:.04em;
  color:var(--jade-deep);
  opacity:0;
  transition:opacity .2s var(--ease);
}
.copy-hint[data-visible="true"]{opacity:1;}

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

/* ---------- 列表工具 ---------- */
.hp-list{
  list-style:disc;
  padding-left:1.25em;
}
.hp-list--num{list-style:decimal;}

/* ---------- 平板 / 移动 ---------- */
@media (max-width:1080px){
  :root{--header-h:90px;}

  .header-rail .rail-inner{min-height:30px;}
  .header-inner{min-height:60px;}

  .nav-toggle{display:inline-flex;}

  .site-nav{
    position:fixed;
    top:var(--header-h);
    left:0;
    right:0;
    max-height:calc(100vh - var(--header-h));
    overflow-y:auto;
    margin:0;
    padding:12px var(--gutter) 28px;
    background:var(--ink-900);
    border-top:1px solid rgba(175,194,209,.22);
    box-shadow:0 30px 50px -34px rgba(0,0,0,.7);
    opacity:0;
    visibility:hidden;
    transform:translateY(-10px);
    transition:opacity .24s var(--ease),transform .24s var(--ease),visibility .24s linear;
  }
  .site-nav[data-open="true"]{
    opacity:1;
    visibility:visible;
    transform:none;
  }
  .nav-list{
    flex-direction:column;
    align-items:stretch;
    gap:0;
  }
  .nav-item{border-bottom:1px solid rgba(175,194,209,.18);}
  .nav-link{
    display:block;
    padding:15px 4px;
    font-size:var(--fs-16);
  }
  .nav-link::after{display:none;}
  .nav-link[aria-current="page"]{color:var(--flame);}
}

@media (max-width:900px){
  .hp-split,
  .hp-split--wide{grid-template-columns:minmax(0,1fr);}
  .footer-top{grid-template-columns:minmax(0,1fr);}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
}

@media (max-width:720px){
  .rail-label,
  .rail-meta{display:none;}
  .rail-inner{
    overflow-x:auto;
    scrollbar-width:none;
  }
  .rail-inner::-webkit-scrollbar{display:none;}
  .rail-list{flex-wrap:nowrap;}
  .footer-bottom{flex-direction:column;}
}

@media (max-width:640px){
  body{font-size:15px;}
  .brand-line{font-size:11px;letter-spacing:.04em;}
  .header-tools{gap:8px;}
  .btn{padding:9px 14px;font-size:13px;}
  .footer-grid{grid-template-columns:minmax(0,1fr);}
}

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

/* ---------- 动态降级 ---------- */
@media (prefers-reduced-motion:reduce){
  *,
  *::before,
  *::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
    scroll-behavior:auto !important;
  }
  [data-reveal]{
    opacity:1 !important;
    transform:none !important;
  }
  .hp-stack-inner{
    opacity:1 !important;
    transform:none !important;
  }
  .btn:hover{transform:none;}
}