/* ============================================================
   开全品牌站 · 共享样式表  /assets/site.css
   门框取景 / 门缝光晕 / 纸张叠层 / 印刷标签 / 状态色
   ============================================================ */

/* ---------- 01 重置 ---------- */
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body,h1,h2,h3,h4,h5,p,ul,ol,li,figure,blockquote,dl,dd{margin:0;padding:0;}
ul,ol{list-style:none;}
img,svg,video{display:block;max-width:100%;}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer;}
table{border-collapse:collapse;}
a{color:inherit;}

/* ---------- 02 设计变量 ---------- */
:root{
  --c-deep:#0E3A4C;
  --c-tide:#1F6E8C;
  --c-indigo:#3B2E63;
  --c-wine:#7A2B3A;
  --c-wood:#C98A5B;
  --c-wood-deep:#8F5220;
  --c-wood-soft:#F2DFCD;
  --c-palm:#4F7F5B;
  --c-sunset:#E4753C;
  --c-paper:#FBF7F1;
  --c-ink:#1B1F22;
  --c-slate:#6B7C85;

  --line:rgba(14,58,76,.16);
  --line-strong:rgba(14,58,76,.34);
  --shadow-card:0 20px 44px -36px rgba(14,58,76,.85);

  --font-head:"Noto Sans SC","PingFang SC","Source Han Sans",system-ui,sans-serif;
  --font-body:"Noto Sans SC","Hiragino Sans GB","Microsoft YaHei",system-ui,sans-serif;
  --font-num:"Noto Sans SC",system-ui,sans-serif;

  --shell:1240px;
  --rail:220px;
  --gap-xs:12px;
  --gap-s:20px;
  --gap-m:40px;
  --gap-l:64px;
  --gap-xl:96px;
  --radius:4px;
  --ease:240ms ease-out;
}

/* ---------- 03 基础排版 ---------- */
body{
  font-family:var(--font-body);
  font-size:17px;
  line-height:1.75;
  color:var(--c-ink);
  background:var(--c-paper);
  font-variant-numeric:tabular-nums;
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4,h5{
  font-family:var(--font-head);
  font-weight:700;
  line-height:1.15;
  letter-spacing:-.02em;
  color:var(--c-deep);
}
h1{font-size:clamp(40px,6.2vw,72px);font-weight:900;}
h2{font-size:clamp(28px,3.4vw,40px);}
h3{font-size:22px;}
h4{font-size:19px;}
strong{font-weight:700;}
p{max-width:42em;}

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

#main-content{scroll-margin-top:110px;}

/* ---------- 04 通用工具 ---------- */
.visually-hidden{
  position:absolute!important;width:1px;height:1px;margin:-1px;padding:0;
  overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0;
}
.shell{width:min(100% - 40px,var(--shell));margin-inline:auto;}
.shell--wide{width:min(100% - 40px,1420px);}
.stack{display:flex;flex-direction:column;gap:var(--gap-s);}
.prose{width:100%;max-width:38em;}
.prose > p + p{margin-top:1.05em;}

/* ---------- 05 跳过链接 ---------- */
.skip-link{
  position:fixed;left:16px;top:-80px;z-index:200;
  padding:12px 22px;background:var(--c-deep);color:#F4FAFB;
  font-weight:700;font-size:15px;text-decoration:none;
  border-radius:0 0 var(--radius) var(--radius);
  transition:top var(--ease);
}
.skip-link:focus{top:0;}

/* ============================================================
   06 头部
   ============================================================ */
.site-header{
  position:sticky;top:0;z-index:80;
  background:linear-gradient(180deg,#FFFDF9 0%,var(--c-paper) 100%);
  border-bottom:1px solid var(--line);
  transition:box-shadow var(--ease);
}
.site-header[data-condensed]{box-shadow:0 16px 38px -28px rgba(14,58,76,.8);}

.progress-rail{
  position:absolute;left:0;right:0;bottom:0;height:2px;
  background:rgba(14,58,76,.10);overflow:hidden;
}
.progress-bar{
  display:block;height:100%;width:0;
  background:linear-gradient(90deg,var(--c-wood) 0%,var(--c-sunset) 100%);
  transition:width .1s linear;
}

.header-frame{
  position:relative;
  width:min(100% - 40px,var(--shell));
  margin-inline:auto;
  display:flex;align-items:center;
  gap:clamp(14px,2vw,32px);
  padding-block:16px;
  transition:padding var(--ease);
}
.site-header[data-condensed] .header-frame{padding-block:10px;}

/* --- 品牌门牌 --- */
.brand{display:flex;align-items:center;gap:12px;text-decoration:none;flex:none;}
.brand-door{
  position:relative;flex:none;
  width:26px;height:32px;
  border:2px solid var(--c-wood);
  border-bottom-width:3px;
  border-radius:4px 4px 2px 2px;
  background:#FFF6EC;
  overflow:hidden;
  transition:transform var(--ease);
}
.brand-door::after{
  content:"";position:absolute;top:0;bottom:0;left:0;width:6px;
  background:linear-gradient(180deg,rgba(228,117,60,.95),rgba(228,117,60,.3));
}
.brand:hover .brand-door{transform:translateY(-2px);}
.brand-text{display:flex;flex-direction:column;min-width:0;}
.brand-name{
  font-family:var(--font-head);font-weight:900;font-size:25px;
  line-height:1.1;letter-spacing:.07em;color:var(--c-deep);
  transition:font-size var(--ease);
}
.brand-slogan{
  font-size:12.5px;letter-spacing:.02em;color:var(--c-slate);
  white-space:nowrap;max-height:22px;
  transition:opacity var(--ease),max-height var(--ease);
}
.site-header[data-condensed] .brand-name{font-size:21px;}
.site-header[data-condensed] .brand-slogan{opacity:0;max-height:0;overflow:hidden;}

/* --- 控制台状态面板 --- */
.door-status{
  display:flex;flex-direction:column;gap:1px;
  margin-right:auto;min-width:0;
  padding-left:18px;
  border-left:1px solid var(--line);
  max-width:none;
}
.door-status-key{
  font-size:11px;letter-spacing:.2em;color:var(--c-slate);
}
.door-status-value{
  display:flex;align-items:center;
  font-family:var(--font-head);font-weight:900;font-size:16px;
  letter-spacing:.02em;color:var(--c-deep);line-height:1.4;
}
.door-status-value::before{
  content:"";flex:none;
  width:7px;height:7px;margin-right:8px;border-radius:50%;
  background:var(--c-palm);
  box-shadow:0 0 0 3px rgba(79,127,91,.18);
}

/* --- 右侧导航组 --- */
.header-tail{display:flex;align-items:center;gap:16px;margin-left:auto;flex:none;}

.site-nav{position:static;opacity:1;visibility:visible;transform:none;}

.nav-list{display:flex;align-items:center;gap:2px;}
.nav-link{
  position:relative;display:inline-block;
  padding:8px 10px;
  font-size:15px;font-weight:500;letter-spacing:.01em;
  color:var(--c-deep);text-decoration:none;
  transition:color var(--ease);
}
.nav-link::after{
  content:"";position:absolute;left:10px;right:10px;bottom:2px;height:2px;
  background:var(--c-wood);
  transform:scaleX(0);transform-origin:left;
  transition:transform var(--ease);
}
.nav-link:hover{color:var(--c-wood-deep);}
.nav-link:hover::after{transform:scaleX(1);}
.nav-link[aria-current="page"]{color:var(--c-wood-deep);font-weight:700;}
.nav-link[aria-current="page"]::after{transform:scaleX(1);background:var(--c-sunset);}

/* --- 胶囊工具按钮 --- */
.header-actions{display:flex;align-items:center;gap:8px;}
.chip-btn{
  display:inline-flex;align-items:center;gap:6px;
  padding:7px 14px;
  border:1px solid var(--line-strong);border-radius:100px;
  background:#FFFFFF;
  font-size:13px;font-weight:500;color:var(--c-deep);
  white-space:nowrap;
  transition:background-color var(--ease),border-color var(--ease),color var(--ease);
}
.chip-btn:hover{border-color:var(--c-wood);background:var(--c-wood-soft);color:var(--c-wood-deep);}
.chip-btn[aria-pressed="true"]{
  background:var(--c-palm);border-color:var(--c-palm);color:#FFFFFF;
}

/* --- 汉堡按钮 --- */
.nav-toggle{
  display:none;flex-direction:column;justify-content:center;gap:5px;
  width:44px;height:40px;padding:0 10px;
  border:1px solid var(--line-strong);border-radius:var(--radius);
  background:#FFFFFF;
  transition:border-color var(--ease);
}
.nav-toggle:hover{border-color:var(--c-wood);}
.nav-toggle-bar{
  display:block;height:2px;width:100%;
  background:var(--c-deep);
  transition:transform var(--ease),opacity var(--ease);
}
.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(2){transform:translateY(7px) rotate(45deg);}
.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(3){opacity:0;}
.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(4){transform:translateY(-7px) rotate(-45deg);}

/* --- 速览索引面板 --- */
.index-panel{
  position:absolute;right:0;top:calc(100% + 8px);
  width:min(560px,calc(100vw - 40px));
  padding:22px 24px 22px;
  background:#FFFFFF;
  border:1px solid var(--line-strong);
  border-top:2px solid var(--c-tide);
  border-radius:var(--radius);
  box-shadow:0 30px 60px -34px rgba(14,58,76,.85);
}
.index-panel[hidden]{display:none;}
.index-panel-title{
  font-family:var(--font-head);font-size:14px;font-weight:900;
  letter-spacing:.18em;color:var(--c-tide);max-width:none;
}
.index-panel-title::before{
  content:"";display:inline-block;width:24px;height:2px;
  margin-right:10px;vertical-align:middle;background:var(--c-wood);
}
.index-panel-note{margin-top:8px;font-size:13px;line-height:1.65;color:var(--c-slate);}
.index-grid{
  display:grid;grid-template-columns:repeat(2,minmax(0,1fr));
  gap:0 18px;margin-top:16px;
}
.index-item{
  display:flex;align-items:center;gap:10px;
  padding:11px 6px;
  border-bottom:1px solid var(--line);
  text-decoration:none;
  transition:background-color var(--ease),color var(--ease);
}
.index-item:hover{background:var(--c-wood-soft);color:var(--c-wood-deep);}
.index-num{
  font-family:var(--font-num);font-weight:900;font-size:15px;
  color:var(--c-wood);font-variant-numeric:tabular-nums;
}
.index-label{font-size:15px;font-weight:500;}

/* ============================================================
   07 页脚（米白纸底 + 深海蓝绿文字）
   ============================================================ */
.site-footer{
  margin-top:var(--gap-xl);
  background:var(--c-paper);
  color:var(--c-deep);
  border-top:2px solid var(--c-wood);
}
.footer-frame{
  width:min(100% - 40px,var(--shell));
  margin-inline:auto;
  display:grid;
  grid-template-columns:minmax(0,1.4fr) repeat(3,minmax(0,1fr));
  gap:var(--gap-m);
  padding-block:64px 44px;
}
.footer-brand{min-width:0;}
.footer-mark{
  font-family:var(--font-head);font-weight:900;font-size:30px;
  letter-spacing:.09em;color:var(--c-deep);line-height:1.2;max-width:none;
}
.footer-line{
  margin-top:12px;font-size:15px;line-height:1.7;
  color:#40565F;max-width:24em;
}
.footer-cta{margin-top:20px;}
.footer-col{min-width:0;}
.footer-col-title{
  font-family:var(--font-head);font-size:13px;font-weight:900;
  letter-spacing:.18em;color:var(--c-tide);
  margin-bottom:16px;
}
.footer-col-title::after{
  content:"";display:block;width:26px;height:2px;
  margin-top:8px;background:var(--c-wood-soft);
}
.footer-list{display:flex;flex-direction:column;gap:11px;}
.footer-link{
  display:inline-block;width:fit-content;
  font-size:15px;color:var(--c-deep);text-decoration:none;
  border-bottom:1px solid transparent;
  transition:color var(--ease),border-color var(--ease);
}
.footer-link:hover{color:var(--c-wood-deep);border-bottom-color:var(--c-wood);}

.footer-sill{
  border-top:1px solid var(--line);
  background:var(--c-wood-soft);
}
.footer-sill-inner{
  width:min(100% - 40px,var(--shell));
  margin-inline:auto;
  padding-block:22px;
  display:grid;
  grid-template-columns:minmax(0,1.7fr) minmax(0,1.3fr) auto;
  gap:10px 32px;align-items:center;
  font-size:14px;color:#3C4A50;
}
.footer-contact,.footer-address,.footer-legal{max-width:none;}
.contact-value{
  font-weight:700;color:var(--c-deep);
  font-variant-numeric:tabular-nums;
  word-break:break-all;
}
.footer-legal{
  display:flex;flex-wrap:wrap;align-items:center;gap:10px;
  justify-content:flex-end;white-space:nowrap;
}
.footer-legal-sep{color:var(--c-wood-deep);}

/* ============================================================
   08 通用布局与分区
   ============================================================ */
.section{padding-block:var(--gap-xl);}
.section--compact{padding-block:var(--gap-l);}
.section--deep{background:var(--c-deep);color:#DCE8EC;}
.section--deep h2,.section--deep h3,.section--deep h4{color:#FFFFFF;}
.section--deep .lede{color:#B9D0D8;}
.section--deep .eyebrow{color:#9DC6D4;}
.section--indigo{background:var(--c-indigo);color:#E7E3F2;}
.section--indigo h2,.section--indigo h3{color:#FFFFFF;}
.section--indigo .lede{color:#C6BFDC;}
.section--wood{background:var(--c-wood-soft);}

.section-head{
  display:flex;flex-wrap:wrap;align-items:flex-end;
  justify-content:space-between;gap:var(--gap-s);
  margin-bottom:var(--gap-m);
}
.eyebrow{
  display:inline-flex;align-items:center;gap:10px;
  font-size:13px;font-weight:700;letter-spacing:.16em;
  color:var(--c-tide);
}
.eyebrow::before{content:"";width:28px;height:2px;background:var(--c-wood);}
.section-title{max-width:22em;}
.lede{font-size:18px;line-height:1.7;color:#3C4A50;max-width:38em;}

/* --- 12 列栅格 --- */
.grid{display:grid;gap:var(--gap-m);}
.grid--12{grid-template-columns:repeat(12,minmax(0,1fr));}
.grid--tight{gap:var(--gap-s);}
.span-4{grid-column:span 4;}
.span-5{grid-column:span 5;}
.span-6{grid-column:span 6;}
.span-7{grid-column:span 7;}
.span-8{grid-column:span 8;}
.span-9{grid-column:span 9;}
.span-12{grid-column:span 12;}

/* ============================================================
   09 门洞容器 / 纸张叠层 / 标签 / 数字锚点
   ============================================================ */
.door-frame{
  --bar:var(--c-wood);
  position:relative;
  padding:clamp(22px,3vw,40px);
  background:
    radial-gradient(130% 84% at 50% -22%,rgba(228,117,60,.10),transparent 62%),
    #FFFFFF;
  border:1px solid var(--line-strong);
  border-top:2px solid var(--bar);
  border-radius:var(--radius);
  box-shadow:var(--shadow-card);
}
.door-frame--tide{--bar:var(--c-tide);}
.door-frame--indigo{--bar:var(--c-indigo);}
.door-frame--palm{--bar:var(--c-palm);}
.door-frame--wine{--bar:var(--c-wine);}

.paper-card{
  position:relative;
  padding:28px;
  background:#FFFFFF;
  border:1px solid var(--line);
  border-radius:var(--radius);
  box-shadow:9px 9px 0 -1px var(--c-wood-soft),9px 9px 0 0 var(--line);
  transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease);
}
.paper-card:hover{
  transform:translate(-3px,-3px);
  border-color:var(--line-strong);
  box-shadow:12px 12px 0 -1px var(--c-wood-soft),12px 12px 0 0 var(--line);
}
.section--deep .paper-card,
.section--indigo .paper-card{
  background:#0B3141;border-color:rgba(255,255,255,.18);
  box-shadow:none;color:#DCE8EC;
}
.section--indigo .paper-card{background:#312651;}
.section--deep .paper-card h3,.section--indigo .paper-card h3{color:#FFFFFF;}

.tag{
  display:inline-flex;align-items:center;gap:6px;
  padding:3px 10px;
  border:1px solid transparent;border-radius:2px;
  font-size:13px;font-weight:700;letter-spacing:.02em;
  background:var(--c-wood-soft);color:#7A4A1E;
}
.tag--ok{background:rgba(79,127,91,.14);color:#2F5A3B;border-color:rgba(79,127,91,.36);}
.tag--warn{background:rgba(201,138,91,.20);color:#8A5426;border-color:rgba(201,138,91,.48);}
.tag--alert{background:rgba(122,43,58,.12);color:#7A2B3A;border-color:rgba(122,43,58,.36);}
.tag--info{background:rgba(31,110,140,.12);color:#175468;border-color:rgba(31,110,140,.34);}
.tag--cut{clip-path:polygon(0 0,calc(100% - 8px) 0,100% 8px,100% 100%,0 100%);}

.num-anchor{
  display:block;
  font-family:var(--font-num);font-weight:900;
  font-size:clamp(56px,7vw,96px);
  line-height:.95;letter-spacing:.01em;
  color:var(--c-wood);
  font-variant-numeric:tabular-nums;
}
.section--deep .num-anchor,.section--indigo .num-anchor{color:var(--c-wood-soft);}

/* ---------- 10 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;gap:10px;
  padding:13px 26px;
  border:1px solid transparent;border-radius:var(--radius);
  font-family:var(--font-head);font-size:16px;font-weight:700;
  text-decoration:none;letter-spacing:.01em;
  transition:background-color var(--ease),color var(--ease),
             border-color var(--ease),transform var(--ease);
}
.btn--primary{background:var(--c-wood);color:#2A1608;}
.btn--primary:hover{background:var(--c-sunset);color:#FFFFFF;transform:translateY(-2px);}
.btn--deep{background:var(--c-deep);color:#F4FAFB;}
.btn--deep:hover{background:var(--c-tide);transform:translateY(-2px);}
.btn--ghost{border-color:var(--line-strong);color:var(--c-deep);}
.btn--ghost:hover{border-color:var(--c-wood);color:var(--c-wood-deep);transform:translateY(-2px);}

/* ---------- 11 面包屑 ---------- */
.breadcrumbs{font-size:14px;color:var(--c-slate);}
.breadcrumb-list{display:flex;flex-wrap:wrap;align-items:center;gap:8px;}
.breadcrumb-list li{display:flex;align-items:center;gap:8px;}
.breadcrumb-list li + li::before{content:"›";color:var(--c-slate);}
.breadcrumb-link{
  color:var(--c-tide);text-decoration:none;
  border-bottom:1px solid transparent;
  transition:border-color var(--ease);
}
.breadcrumb-link:hover{border-bottom-color:currentColor;}
.breadcrumb-current{color:var(--c-deep);font-weight:700;}
.section--deep .breadcrumbs,.section--indigo .breadcrumbs{color:#A9C4CE;}
.section--deep .breadcrumb-link,.section--indigo .breadcrumb-link{color:#B9D0D8;}
.section--deep .breadcrumb-current,.section--indigo .breadcrumb-current{color:#FFFFFF;}

/* ---------- 12 图片容器（页面阶段放置图片占位） ---------- */
.figure{margin:0;}
.figure-frame{
  position:relative;overflow:hidden;
  border:1px solid var(--line-strong);
  border-radius:var(--radius);
  background:linear-gradient(160deg,#E7EFF2 0%,var(--c-wood-soft) 100%);
  aspect-ratio:16/10;
}
.figure-frame img{width:100%;height:100%;object-fit:cover;}
.figure-frame--tall{aspect-ratio:4/5;}
.figure-frame--wide{aspect-ratio:21/9;}
.figure-frame--square{aspect-ratio:1/1;}
.figure-frame--empty{
  background-image:
    repeating-linear-gradient(115deg,rgba(14,58,76,.07) 0 2px,transparent 2px 16px),
    linear-gradient(160deg,#E9F0F3 0%,var(--c-wood-soft) 100%);
}
.figure-caption{
  margin-top:10px;font-size:14px;line-height:1.6;color:var(--c-slate);
  max-width:36em;
}
.section--deep .figure-caption,.section--indigo .figure-caption{color:#A9C4CE;}
.section--deep .figure-frame,.section--indigo .figure-frame{border-color:rgba(255,255,255,.28);}

/* ---------- 13 对照表 ---------- */
.data-table{
  width:100%;
  font-size:16px;line-height:1.5;
  background:#FFFFFF;
  border:1px solid var(--line);
}
.data-table caption{
  caption-side:top;text-align:left;
  padding-bottom:10px;font-size:14px;color:var(--c-slate);
}
.data-table th{
  padding:14px 16px;text-align:left;
  background:var(--c-deep);color:#EDF5F7;
  font-family:var(--font-head);font-weight:700;font-size:15px;
  letter-spacing:.02em;
}
.data-table td{
  padding:14px 16px;
  border-bottom:1px solid var(--line);
  vertical-align:top;
}
.data-table tbody tr:nth-child(even){background:var(--c-wood-soft);}
.data-table tbody tr:last-child td{border-bottom:0;}

/* ---------- 14 门缝光晕 ---------- */
@keyframes seam-breath{
  0%,100%{opacity:.55;}
  50%{opacity:1;}
}
.seam-glow{
  display:block;
  background:linear-gradient(180deg,rgba(228,117,60,.9),rgba(228,117,60,.15));
  opacity:.7;
  animation:seam-breath 6s ease-in-out infinite;
}

/* ---------- 15 滚动显现（仅在 JS 就绪时生效） ---------- */
html.js-ready [data-section]{
  opacity:0;transform:translateY(16px);
  transition:opacity .5s ease-out,transform .5s ease-out;
}
html.js-ready [data-section][data-active="true"]{opacity:1;transform:none;}

/* ============================================================
   16 响应式
   ============================================================ */
@media (max-width:1100px){
  .door-status{display:none;}
  .header-frame{gap:16px;}
  .nav-toggle{display:inline-flex;}
  .site-nav{
    position:absolute;left:0;right:0;top:100%;
    padding:8px 0 16px;
    background:var(--c-paper);
    border:1px solid var(--line);
    border-top:2px solid var(--c-wood);
    border-radius:0 0 var(--radius) var(--radius);
    box-shadow:0 30px 54px -34px rgba(14,58,76,.85);
    opacity:0;visibility:hidden;transform:translateY(-10px);
    transition:opacity var(--ease),transform var(--ease),visibility var(--ease);
  }
  .site-nav[data-open]{opacity:1;visibility:visible;transform:translateY(0);}
  .nav-list{flex-direction:column;align-items:stretch;gap:0;padding:0 clamp(20px,5vw,34px);}
  .nav-link{
    display:block;padding:14px 2px;font-size:17px;
    border-bottom:1px solid var(--line);
  }
  .nav-link::after{display:none;}
  .nav-link[aria-current="page"]{
    color:var(--c-wood-deep);
    border-bottom-color:var(--c-wood);
    padding-left:12px;
    border-left:3px solid var(--c-wood);
  }
  .nav-list li:last-child .nav-link{border-bottom:0;}

  .footer-frame{
    grid-template-columns:repeat(2,minmax(0,1fr));
    gap:var(--gap-m) var(--gap-s);
    padding-block:52px 36px;
  }
  .footer-brand{grid-column:1 / -1;}
  .footer-sill-inner{grid-template-columns:1fr;gap:10px;}
  .footer-legal{justify-content:flex-start;}
}

@media (max-width:900px){
  .grid--12{grid-template-columns:repeat(6,minmax(0,1fr));}
  .span-4,.span-5,.span-6,.span-7,.span-8,.span-9{grid-column:1 / -1;}
  .section{padding-block:var(--gap-l);}
}

@media (max-width:640px){
  body{font-size:16px;}
  .shell,.header-frame,.footer-frame,.footer-sill-inner{width:min(100% - 32px,var(--shell));}
  .brand-name{font-size:22px;}
  .brand-slogan{display:none;}
  .site-header[data-condensed] .brand-name{font-size:20px;}
  .chip-btn{padding:7px 11px;font-size:12.5px;}
  .index-grid{grid-template-columns:1fr;}
  .grid--12{grid-template-columns:1fr;}
  .paper-card{padding:22px;box-shadow:6px 6px 0 -1px var(--c-wood-soft),6px 6px 0 0 var(--line);}
  .footer-frame{grid-template-columns:1fr;}
  .footer-sill-inner{padding-block:18px;}
  .footer-legal{white-space:normal;}
}

@media (max-width:420px){
  .header-actions .chip-btn:first-child{display:none;}
}

/* ---------- 17 动效偏好 ---------- */
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{
    animation-duration:.01ms!important;
    animation-iteration-count:1!important;
    transition-duration:.01ms!important;
    scroll-behavior:auto!important;
  }
  html.js-ready [data-section]{opacity:1!important;transform:none!important;}
  .paper-card:hover{transform:none;}
}