/* ==========================================================================
   乐鱼赛场 · 共享样式 /assets/site.css
   深海竞技场底色 + 荧光青主强调 + 珊瑚橙行动色
   ========================================================================== */

/* ---------- 1. 设计令牌 ---------- */
:root{
  --abyss-950:#04121F;
  --abyss-800:#0A2740;
  --deep-600:#14486E;
  --cyan-400:#2FE3D6;
  --cyan-200:#A6F6EF;
  --coral-500:#FF6A45;
  --coral-200:#FFC0AC;
  --foam-050:#EAF5F6;
  --slate-400:#8AA6B8;
  --amber-300:#FFD166;

  --ink-dark:#08202F;
  --line-cool:rgba(47,227,214,.18);
  --line-cool-strong:rgba(47,227,214,.42);
  --line-warm:rgba(255,106,69,.26);
  --line-quiet:rgba(138,166,184,.20);

  --font-display:"HarmonyOS Sans SC","Alibaba PuHuiTi","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-body:"PingFang SC","Source Han Sans SC","Noto Sans SC","Hiragino Sans GB",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-data:"JetBrains Mono","Roboto Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;

  --header-h:74px;
  --shell-max:1440px;
  --gutter:clamp(18px,4vw,56px);

  --r-xl:40px;
  --r-lg:28px;
  --r-md:20px;
  --r-sm:12px;
  --pill:999px;

  --dur:180ms;
  --ease:cubic-bezier(.22,.61,.36,1);
}

/* ---------- 2. Reset ---------- */
*,
*::before,
*::after{box-sizing:border-box;}

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

body,
h1,h2,h3,h4,h5,h6,
p,ul,ol,li,figure,figcaption,blockquote,dl,dd{margin:0;}

ul,ol{padding:0;list-style:none;}

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

button,input,select,textarea{font:inherit;color:inherit;}

button{background:none;border:0;padding:0;cursor:pointer;}

a{color:inherit;text-decoration:none;}

table{border-collapse:collapse;width:100%;}

:focus-visible{outline:2px solid var(--cyan-400);outline-offset:2px;}

/* ---------- 3. 中文排版与基础版面 ---------- */
body{
  min-height:100vh;
  overflow-x:hidden;
  background-color:var(--abyss-950);
  background-image:
    radial-gradient(1100px 700px at 84% -12%, rgba(20,72,110,.62), transparent 68%),
    radial-gradient(760px 560px at 0% 18%, rgba(47,227,214,.10), transparent 64%),
    linear-gradient(180deg,#04121F 0%, #05182A 46%, #04121F 100%);
  background-attachment:fixed;
  color:var(--foam-050);
  font-family:var(--font-body);
  font-size:clamp(16px,1.05vw,18px);
  line-height:1.75;
  letter-spacing:.005em;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}

h1,h2,h3{
  font-family:var(--font-display);
  font-weight:800;
  line-height:.98;
  letter-spacing:-.02em;
  text-wrap:balance;
}

p{text-wrap:pretty;}

.mono{
  font-family:var(--font-data);
  letter-spacing:.02em;
}

main{
  display:block;
  position:relative;
  z-index:1;
  padding-top:var(--header-h);
}

/* ---------- 4. 跳转链接 ---------- */
.skip-link{
  position:fixed;
  top:10px;
  left:10px;
  z-index:200;
  padding:12px 22px;
  border-radius:var(--pill);
  background:var(--cyan-400);
  color:#04212A;
  font-size:14px;
  font-weight:700;
  transform:translateY(-200%);
  transition:transform var(--dur) var(--ease);
}
.skip-link:focus{transform:translateY(0);}

/* ---------- 5. 头部 ---------- */
.site-header{
  position:fixed;
  top:0;
  left:0;
  right:0;
  z-index:90;
  background-color:transparent;
  border-bottom:1px solid transparent;
  color:var(--foam-050);
  transition:background-color var(--dur) var(--ease),
             border-color var(--dur) var(--ease),
             box-shadow var(--dur) var(--ease);
}

.site-header.is-solid{
  background-color:rgba(5,20,34,.94);
  border-bottom-color:var(--line-cool);
  box-shadow:0 18px 44px -30px rgba(0,0,0,.95);
  -webkit-backdrop-filter:blur(16px);
  backdrop-filter:blur(16px);
}

.header-progress{
  position:absolute;
  left:0;
  right:0;
  bottom:-1px;
  height:2px;
  background:linear-gradient(90deg,var(--cyan-400),var(--coral-500));
  transform:scaleX(0);
  transform-origin:0 50%;
  opacity:.92;
  will-change:transform;
}

.header-inner{
  max-width:var(--shell-max);
  margin-inline:auto;
  padding-inline:var(--gutter);
  min-height:var(--header-h);
  display:flex;
  align-items:center;
  gap:clamp(14px,2vw,34px);
}

/* 品牌 */
.brand{
  display:inline-flex;
  align-items:center;
  gap:12px;
  flex:0 0 auto;
}

.brand-mark{
  width:38px;
  height:38px;
  flex:0 0 auto;
  border-radius:13px;
  display:grid;
  place-items:center;
  background:linear-gradient(140deg,var(--cyan-400),#1C93BE);
  color:#04212A;
  font-family:var(--font-display);
  font-weight:800;
  font-size:19px;
  line-height:1;
  box-shadow:0 0 0 1px rgba(47,227,214,.35), 0 10px 26px -14px rgba(47,227,214,.9);
}

.brand-text{
  display:flex;
  flex-direction:column;
  gap:3px;
  line-height:1.1;
}

.brand-name{
  font-family:var(--font-display);
  font-weight:700;
  font-size:17px;
  letter-spacing:.02em;
}

.brand-tag{
  font-family:var(--font-data);
  font-size:10.5px;
  letter-spacing:.18em;
  color:var(--slate-400);
}

/* 主导航 */
.site-nav{
  display:flex;
  align-items:center;
  gap:clamp(12px,2vw,28px);
  margin-left:auto;
}

.nav-list{
  display:flex;
  align-items:center;
  gap:clamp(2px,.8vw,10px);
}

.nav-link{
  position:relative;
  display:inline-block;
  padding:9px 11px;
  border-radius:var(--pill);
  font-size:13.5px;
  letter-spacing:.01em;
  white-space:nowrap;
  color:rgba(234,245,246,.76);
  transition:color var(--dur) var(--ease), background-color var(--dur) var(--ease);
}

.nav-link::after{
  content:"";
  position:absolute;
  left:11px;
  right:11px;
  bottom:3px;
  height:2px;
  border-radius:2px;
  background:var(--cyan-400);
  transform:scaleX(0);
  transform-origin:left center;
  transition:transform var(--dur) var(--ease);
}

.nav-link:hover{
  color:var(--foam-050);
  background-color:rgba(47,227,214,.09);
}
.nav-link:hover::after{transform:scaleX(1);}

.nav-link[aria-current="page"]{
  color:var(--cyan-200);
  background-color:rgba(47,227,214,.10);
}
.nav-link[aria-current="page"]::after{transform:scaleX(1);}

.nav-actions{
  display:flex;
  align-items:center;
  gap:10px;
  flex:0 0 auto;
}

/* 移动端按钮 */
.nav-toggle{
  display:none;
  margin-left:auto;
  align-items:center;
  gap:10px;
  padding:10px 16px;
  border-radius:var(--pill);
  border:1px solid var(--line-cool-strong);
  color:var(--cyan-200);
  font-family:var(--font-data);
  font-size:12.5px;
  letter-spacing:.08em;
  transition:background-color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.nav-toggle:hover{background-color:rgba(47,227,214,.12);border-color:var(--cyan-400);}

.nav-toggle-bars{
  position:relative;
  display:block;
  width:18px;
  height:12px;
  flex:0 0 auto;
}
.nav-toggle-bars::before,
.nav-toggle-bars::after{
  content:"";
  position:absolute;
  left:0;
  right:0;
  height:2px;
  border-radius:2px;
  background:currentColor;
  transition:transform var(--dur) var(--ease);
}
.nav-toggle-bars::before{top:0;}
.nav-toggle-bars::after{bottom:0;}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars::before{transform:translateY(5px) rotate(45deg);}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars::after{transform:translateY(-5px) rotate(-45deg);}

/* ---------- 6. 页脚 ---------- */
.site-footer{
  position:relative;
  margin-top:clamp(64px,9vw,132px);
  background-image:
    radial-gradient(640px 320px at 90% 0%, rgba(255,106,69,.15), transparent 72%),
    radial-gradient(560px 300px at 4% 10%, rgba(47,227,214,.10), transparent 70%),
    linear-gradient(180deg,#05182A 0%, #04121F 64%);
  border-top:1px solid var(--line-cool);
  color:var(--foam-050);
  font-size:15px;
}

.footer-inner{
  max-width:var(--shell-max);
  margin-inline:auto;
  padding:clamp(44px,6vw,84px) var(--gutter) clamp(30px,4vw,48px);
  display:grid;
  grid-template-columns:minmax(230px,1.35fr) repeat(3,minmax(130px,.75fr));
  gap:clamp(28px,4vw,56px);
}

.footer-brand-name{
  font-family:var(--font-display);
  font-weight:800;
  font-size:clamp(24px,2.6vw,34px);
  line-height:1;
  letter-spacing:-.015em;
}

.footer-brand-tag{
  margin-top:12px;
  font-family:var(--font-data);
  font-size:11.5px;
  letter-spacing:.18em;
  color:var(--cyan-400);
}

.footer-brand-note{
  margin-top:16px;
  max-width:34ch;
  font-size:13.5px;
  line-height:1.75;
  color:var(--slate-400);
}

.footer-col-title{
  font-family:var(--font-data);
  font-size:11px;
  letter-spacing:.22em;
  text-transform:uppercase;
  color:var(--cyan-200);
}

.footer-links{
  margin-top:16px;
  display:flex;
  flex-direction:column;
  gap:11px;
}

.footer-link{
  display:inline-block;
  width:fit-content;
  font-size:14.5px;
  color:rgba(234,245,246,.72);
  border-bottom:1px solid transparent;
  transition:color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.footer-link:hover{
  color:var(--cyan-200);
  border-bottom-color:var(--line-cool-strong);
}

.footer-meta{
  max-width:var(--shell-max);
  margin-inline:auto;
  padding-inline:var(--gutter);
  padding-top:clamp(24px,3vw,36px);
  padding-bottom:clamp(24px,3vw,34px);
  border-top:1px solid var(--line-quiet);
  display:grid;
  grid-template-columns:minmax(0,1.15fr) minmax(0,1fr);
  gap:clamp(20px,3vw,48px);
}

.footer-meta-title{
  font-family:var(--font-data);
  font-size:11px;
  letter-spacing:.22em;
  text-transform:uppercase;
  color:var(--coral-200);
  margin-bottom:14px;
}

.footer-contact-list{
  display:flex;
  flex-direction:column;
  gap:9px;
  font-size:13.5px;
  color:var(--foam-050);
}

.footer-chip{
  display:inline-block;
  min-width:64px;
  font-family:var(--font-data);
  font-size:11px;
  letter-spacing:.14em;
  color:var(--slate-400);
}

.footer-address{
  font-size:13.5px;
  line-height:1.8;
  color:var(--slate-400);
}

.footer-filing{
  margin-top:10px;
  font-size:13px;
  color:var(--cyan-200);
}

.footer-base{
  max-width:var(--shell-max);
  margin-inline:auto;
  padding:0 var(--gutter) clamp(30px,4vw,50px);
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:10px 24px;
  font-family:var(--font-data);
  font-size:12px;
  letter-spacing:.08em;
  color:var(--slate-400);
}

/* ---------- 7. 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:11px 20px;
  border-radius:var(--pill);
  border:1px solid transparent;
  font-size:14px;
  font-weight:500;
  line-height:1.2;
  white-space:nowrap;
  transition:background-color var(--dur) var(--ease),
             color var(--dur) var(--ease),
             border-color var(--dur) var(--ease),
             transform var(--dur) var(--ease);
}
.btn:active{transform:translateY(1px);}

.btn-coral{
  background-color:var(--coral-500);
  border-color:var(--coral-500);
  color:#28100A;
  font-weight:700;
}
.btn-coral:hover{background-color:var(--coral-200);border-color:var(--coral-200);}

.btn-cyan{
  background-color:var(--cyan-400);
  border-color:var(--cyan-400);
  color:#04212A;
  font-weight:700;
}
.btn-cyan:hover{background-color:var(--cyan-200);border-color:var(--cyan-200);}

.btn-ghost{
  background-color:transparent;
  border-color:var(--line-cool-strong);
  color:var(--cyan-200);
}
.btn-ghost:hover{
  background-color:rgba(47,227,214,.12);
  border-color:var(--cyan-400);
  color:var(--foam-050);
}

/* ---------- 8. 胶囊 / 状态 / 指标 ---------- */
.pill-row{
  display:flex;
  flex-wrap:wrap;
  gap:10px;
  align-items:center;
}

.pill{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:8px 15px;
  border-radius:var(--pill);
  border:1px solid rgba(47,227,214,.26);
  background-color:rgba(47,227,214,.08);
  color:var(--cyan-200);
  font-size:13px;
  letter-spacing:.02em;
  cursor:default;
  transition:background-color var(--dur) var(--ease),
             color var(--dur) var(--ease),
             border-color var(--dur) var(--ease);
}
button.pill{cursor:pointer;}

.pill:hover{border-color:var(--cyan-400);color:var(--foam-050);}

.pill[aria-pressed="true"],
.pill[aria-selected="true"]{
  background-color:var(--cyan-400);
  border-color:var(--cyan-400);
  color:#04212A;
  font-weight:700;
}

.pill--warm{
  border-color:var(--line-warm);
  background-color:rgba(255,106,69,.10);
  color:var(--coral-200);
}
.pill--warm:hover{border-color:var(--coral-500);color:var(--foam-050);}

.pill--quiet{
  border-color:var(--line-quiet);
  background-color:transparent;
  color:var(--slate-400);
}

.status-dot{
  display:inline-block;
  width:8px;
  height:8px;
  flex:0 0 auto;
  border-radius:50%;
  background-color:var(--cyan-400);
  box-shadow:0 0 0 4px rgba(47,227,214,.16);
}
.status-dot--warm{
  background-color:var(--coral-500);
  box-shadow:0 0 0 4px rgba(255,106,69,.18);
}
.status-dot--warn{
  background-color:var(--amber-300);
  box-shadow:0 0 0 4px rgba(255,209,102,.18);
}

.metric{display:block;}
.metric-value{
  display:block;
  font-family:var(--font-data);
  font-weight:700;
  font-size:clamp(26px,3vw,40px);
  line-height:1;
  letter-spacing:.02em;
  color:var(--cyan-200);
}
.metric-label{
  display:block;
  margin-top:9px;
  font-size:13px;
  letter-spacing:.04em;
  color:var(--slate-400);
}
.metric--warm .metric-value{color:var(--coral-200);}

/* ---------- 9. 区块 / 面板 / 长文 ---------- */
.shell{
  width:100%;
  max-width:var(--shell-max);
  margin-inline:auto;
  padding-inline:var(--gutter);
}

.section{padding-block:clamp(40px,6vw,84px);}
.section--tight{padding-block:clamp(26px,3.5vw,52px);}

.divider{
  height:1px;
  border:0;
  background-image:linear-gradient(90deg,rgba(47,227,214,.55),rgba(255,106,69,.28) 62%,rgba(47,227,214,0));
}

.anchor-line{
  position:absolute;
  left:-6%;
  right:-6%;
  height:1px;
  pointer-events:none;
  background-image:linear-gradient(90deg,transparent,rgba(47,227,214,.42) 32%,rgba(255,106,69,.34) 68%,transparent);
  transform:rotate(-12deg);
  transform-origin:center;
}

.panel{
  position:relative;
  border-radius:var(--r-xl);
  border:1px solid var(--line-cool);
  background-image:linear-gradient(155deg, rgba(10,39,64,.92), rgba(4,18,31,.94));
  padding:clamp(20px,3vw,38px);
}

.panel--cool{
  border-color:rgba(47,227,214,.30);
  background-image:linear-gradient(155deg, rgba(12,48,74,.94), rgba(4,18,31,.95));
}

.panel--warm{
  border-color:var(--line-warm);
  background-image:linear-gradient(155deg, rgba(255,106,69,.14), rgba(4,18,31,.94) 62%);
}

.panel-light{
  border-radius:var(--r-xl);
  background-color:var(--foam-050);
  color:var(--ink-dark);
  padding:clamp(24px,4vw,54px);
}

.prose{
  max-width:68ch;
  font-size:17px;
  line-height:1.8;
  color:inherit;
}
.prose p + p{margin-top:1.05em;}
.prose h2{
  margin-top:1.7em;
  font-size:clamp(22px,2.4vw,28px);
  line-height:1.25;
  letter-spacing:-.015em;
}
.prose h3{
  margin-top:1.3em;
  font-size:19px;
  font-weight:700;
  line-height:1.4;
}
.prose ul{
  margin-top:1em;
  display:flex;
  flex-direction:column;
  gap:.55em;
}
.prose li{
  padding-left:1.1em;
  position:relative;
}
.prose li::before{
  content:"";
  position:absolute;
  left:0;
  top:.72em;
  width:6px;
  height:6px;
  border-radius:50%;
  background-color:currentColor;
  opacity:.5;
}
.prose a{
  color:#0C6270;
  border-bottom:1px solid currentColor;
}

/* ---------- 10. 标题层级 / 眉标 / 导语 / 面包屑 ---------- */
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:9px;
  font-family:var(--font-data);
  font-size:11.5px;
  letter-spacing:.22em;
  text-transform:uppercase;
  color:var(--cyan-400);
}

.lede{
  max-width:56ch;
  font-size:clamp(17px,1.4vw,20px);
  line-height:1.7;
  color:rgba(234,245,246,.82);
}

.breadcrumb{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:9px;
  font-family:var(--font-data);
  font-size:12px;
  letter-spacing:.08em;
  color:var(--slate-400);
}
.breadcrumb a{
  color:var(--slate-400);
  border-bottom:1px solid transparent;
  transition:color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.breadcrumb a:hover{
  color:var(--cyan-200);
  border-bottom-color:var(--line-cool-strong);
}
.breadcrumb-sep{color:rgba(138,166,184,.5);}
.breadcrumb-current{color:var(--cyan-200);}

/* ---------- 11. 栅格 ---------- */
.grid-12{
  display:grid;
  grid-template-columns:repeat(12,minmax(0,1fr));
  gap:clamp(16px,2vw,26px);
}

.col-3{grid-column:span 3;}
.col-4{grid-column:span 4;}
.col-5{grid-column:span 5;}
.col-6{grid-column:span 6;}
.col-7{grid-column:span 7;}
.col-8{grid-column:span 8;}
.col-9{grid-column:span 9;}
.col-12{grid-column:span 12;}

/* ---------- 12. 轮次索引 ---------- */
.round-rail{
  position:sticky;
  top:calc(var(--header-h) + 20px);
  align-self:start;
  display:flex;
  flex-direction:column;
  gap:3px;
  padding:16px 14px;
  border-radius:var(--r-lg);
  border:1px solid var(--line-cool);
  background-color:rgba(10,39,64,.55);
}

.round-rail-title{
  margin-bottom:10px;
  font-family:var(--font-data);
  font-size:11px;
  letter-spacing:.22em;
  text-transform:uppercase;
  color:var(--cyan-400);
}

.round-link{
  position:relative;
  display:flex;
  align-items:center;
  gap:10px;
  padding:9px 12px 9px 15px;
  border-radius:var(--r-sm);
  font-size:14px;
  color:rgba(234,245,246,.68);
  transition:color var(--dur) var(--ease), background-color var(--dur) var(--ease);
}

.round-link::before{
  content:"";
  position:absolute;
  left:0;
  top:50%;
  width:2px;
  height:0;
  border-radius:2px;
  background-color:var(--cyan-400);
  transform:translateY(-50%);
  transition:height var(--dur) var(--ease), background-color var(--dur) var(--ease);
}

.round-link:hover{
  color:var(--foam-050);
  background-color:rgba(47,227,214,.08);
}
.round-link:hover::before{height:58%;}

.round-link[aria-current]{
  color:var(--cyan-200);
  background-color:rgba(47,227,214,.13);
}
.round-link[aria-current]::before{
  height:72%;
  background-color:var(--coral-500);
}

.round-num{
  font-family:var(--font-data);
  font-size:11.5px;
  letter-spacing:.06em;
  color:var(--slate-400);
}

/* ---------- 13. 影像容器（无远程资源） ---------- */
.media-frame{
  position:relative;
  overflow:hidden;
  border-radius:var(--r-lg);
  border:1px solid var(--line-cool);
  background-color:var(--abyss-800);
  background-image:linear-gradient(150deg,var(--deep-600),var(--abyss-800) 56%,var(--abyss-950));
  aspect-ratio:16 / 9;
}
.media-frame img,
.media-frame svg,
.media-frame video{
  width:100%;
  height:100%;
  object-fit:cover;
}
.media-frame figcaption{
  position:absolute;
  left:0;
  right:0;
  bottom:0;
  padding:14px 18px;
  font-family:var(--font-data);
  font-size:12px;
  letter-spacing:.06em;
  color:var(--foam-050);
  background-image:linear-gradient(180deg,transparent,rgba(4,18,31,.88));
}
.media-frame--wide{aspect-ratio:21 / 9;}
.media-frame--tall{aspect-ratio:4 / 5;}
.media-frame--square{aspect-ratio:1 / 1;}

/* ---------- 14. 显现动效 ---------- */
[data-reveal]{
  transition:opacity 260ms var(--ease), transform 260ms var(--ease);
}
html.js-reveal [data-reveal]:not(.is-visible){
  opacity:0;
  transform:translateY(18px);
}

/* ---------- 15. 响应式 ---------- */
@media (max-width:1240px){
  .brand-tag{display:none;}
  .nav-link{font-size:13px;padding:8px 9px;}
  .nav-link::after{left:9px;right:9px;}
}

@media (max-width:1040px){
  .footer-inner{
    grid-template-columns:repeat(3,minmax(0,1fr));
  }
  .footer-brand{grid-column:1 / -1;}
  .footer-brand-note{max-width:52ch;}
}

@media (max-width:1020px){
  .nav-toggle{display:inline-flex;}

  .site-nav{
    position:fixed;
    top:var(--header-h);
    left:0;
    right:0;
    display:flex;
    flex-direction:column;
    align-items:stretch;
    gap:18px;
    margin-left:0;
    max-height:calc(100vh - var(--header-h));
    overflow-y:auto;
    padding:22px var(--gutter) 34px;
    background-color:rgba(5,20,34,.985);
    -webkit-backdrop-filter:blur(18px);
    backdrop-filter:blur(18px);
    border-bottom:1px solid var(--line-cool);
    box-shadow:0 34px 64px -34px rgba(0,0,0,.95);
    opacity:0;
    visibility:hidden;
    transform:translateY(-12px);
    transition:opacity var(--dur) var(--ease),
               transform var(--dur) var(--ease),
               visibility var(--dur) linear;
  }
  .site-nav[data-open]{
    opacity:1;
    visibility:visible;
    transform:translateY(0);
  }

  .nav-list{
    flex-direction:column;
    align-items:stretch;
    gap:2px;
  }
  .nav-link{
    display:flex;
    align-items:center;
    justify-content:space-between;
    padding:14px 16px;
    border-radius:var(--r-sm);
    font-size:16px;
  }
  .nav-link::after{display:none;}
  .nav-link[aria-current="page"]{
    background-color:rgba(47,227,214,.14);
    color:var(--cyan-200);
  }

  .nav-actions{flex-direction:column;align-items:stretch;gap:10px;border-top:1px solid var(--line-quiet);padding-top:18px;}
  .nav-actions .btn{width:100%;}

  .footer-meta{
    grid-template-columns:1fr;
    gap:26px;
  }
}

@media (max-width:900px){
  .col-3,.col-4,.col-5,.col-6{grid-column:span 6;}
  .col-7,.col-8,.col-9{grid-column:span 12;}
  .round-rail{
    position:static;
    top:auto;
    flex-direction:row;
    flex-wrap:wrap;
  }
  .round-link{padding:8px 12px;}
  .round-link::before{display:none;}
}

@media (max-width:640px){
  :root{
    --header-h:64px;
    --r-xl:28px;
    --r-lg:22px;
    --r-md:16px;
  }
  body{line-height:1.7;}
  .footer-inner{grid-template-columns:repeat(2,minmax(0,1fr));gap:26px 20px;}
  .col-3,.col-4,.col-5,.col-6{grid-column:span 12;}
  .footer-base{flex-direction:column;align-items:flex-start;}
}

/* ---------- 16. 减弱动效 ---------- */
@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto !important;}
  *,
  *::before,
  *::after{
    transition-duration:1ms !important;
    animation-duration:1ms !important;
    animation-iteration-count:1 !important;
  }
  html.js-reveal [data-reveal]:not(.is-visible){
    opacity:1;
    transform:none;
  }
  .header-progress{transition:none !important;}
}