/* ==========================================================================
   百胜游戏站 · /assets/site.css
   共享外壳：设计变量 / 重置 / 中文排版 / 页头 / 页脚 / 通用组件
   ========================================================================== */

:root{
  color-scheme: dark;

  --ink-900:#0B1622;
  --ink-800:#1A2A3A;
  --panel:#22384D;
  --panel-hi:#2B4560;
  --lamp:#FFB347;
  --lamp-soft:#FFD98A;
  --neon:#9B59B6;
  --mint:#2ECC71;
  --paper:#F5F7FA;
  --silver:#8FA3B8;
  --alert:#E5484D;

  --line:rgba(245,247,250,.12);
  --line-soft:rgba(245,247,250,.07);
  --line-lamp:rgba(255,179,71,.42);

  --glow-lamp:0 0 18px rgba(255,179,71,.45);
  --glow-soft:0 0 34px rgba(255,179,71,.18);
  --shadow-deep:0 24px 60px rgba(0,0,0,.55);

  --font-brand:"Noto Sans SC","Source Han Sans SC","PingFang SC","Hiragino Sans GB",
               "Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-mono:"JetBrains Mono","IBM Plex Mono","SFMono-Regular",Consolas,
              "Liberation Mono",Menlo,monospace;

  --r-xl:32px;
  --r-lg:24px;
  --r-md:16px;
  --pill:999px;

  --shell:1240px;
  --gutter:clamp(16px,4.2vw,44px);
  --rail-h:36px;
  --ease:cubic-bezier(.22,.68,.28,1);
}

/* ---------- 重置 ---------- */
*,
*::before,
*::after{box-sizing:border-box}

html{
  -webkit-text-size-adjust:100%;
  scroll-behavior:smooth;
  scroll-padding-top:calc(var(--rail-h) + 96px);
}

body{
  margin:0;
  min-height:100vh;
  font-family:var(--font-brand);
  font-size:17px;
  line-height:1.85;
  color:var(--paper);
  background-color:var(--ink-900);
  background-image:
    radial-gradient(880px 520px at 84% -10%,rgba(255,179,71,.17),transparent 62%),
    radial-gradient(720px 480px at 4% 6%,rgba(155,89,182,.13),transparent 60%),
    linear-gradient(180deg,#0B1622 0%,#1A2A3A 44%,#12212F 76%,#0B1622 100%);
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}

body.nav-open{overflow:hidden}

h1,h2,h3,h4,h5,h6,p,figure,blockquote,dl,dd{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
img,svg{display:block;max-width:100%}
img{height:auto}
button,input,select,textarea{font:inherit;color:inherit}
button{background:none;border:0;cursor:pointer}
a{color:var(--lamp-soft);text-decoration:none}
a:hover{text-decoration:underline;text-underline-offset:3px}

::selection{background:var(--lamp);color:var(--ink-900)}

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

/* ---------- 中文排版 ---------- */
h1,h2,h3,h4{
  font-family:var(--font-brand);
  font-weight:900;
  letter-spacing:-.02em;
  line-height:1.12;
  color:var(--paper);
}
h1{font-size:clamp(38px,6.2vw,68px);line-height:1.06}
h2{font-size:clamp(27px,3.9vw,44px)}
h3{font-size:clamp(20px,2.4vw,26px);line-height:1.28;letter-spacing:-.012em}
h4{font-size:clamp(17px,1.8vw,20px);line-height:1.4;letter-spacing:0}

p{margin:0 0 1.05em;max-width:68ch}
p:last-child{margin-bottom:0}
strong,b{font-weight:700;color:var(--paper)}

.lead{
  font-size:clamp(17px,1.55vw,19px);
  line-height:1.85;
  color:rgba(245,247,250,.84);
  max-width:64ch;
}

.mono{
  font-family:var(--font-mono);
  font-size:13px;
  letter-spacing:.08em;
  color:var(--silver);
  line-height:1.7;
}

.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.2em;
  text-transform:uppercase;
  color:var(--lamp-soft);
  margin-bottom:14px;
}
.eyebrow::before{
  content:"";
  width:24px;
  height:1px;
  background:linear-gradient(90deg,var(--lamp),rgba(255,179,71,0));
}

.rule{
  height:1px;
  border:0;
  margin:0;
  background:linear-gradient(90deg,
    rgba(255,179,71,.62) 0%,
    rgba(245,247,250,.10) 38%,
    rgba(245,247,250,0) 100%);
}

/* ---------- 布局 ---------- */
.container{
  width:100%;
  max-width:var(--shell);
  margin:0 auto;
  padding:0 var(--gutter);
}

.section{
  position:relative;
  padding:clamp(46px,6.5vw,92px) 0;
  scroll-margin-top:calc(var(--rail-h) + 96px);
}

.section-coord{
  display:block;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.18em;
  color:var(--silver);
  margin-bottom:10px;
  transition:color .3s var(--ease),text-shadow .3s var(--ease);
}
[data-section].is-current .section-coord{
  color:var(--lamp);
  text-shadow:0 0 14px rgba(255,179,71,.55);
}

/* ---------- 滚动显现 ---------- */
[data-reveal]{
  transition:opacity .55s var(--ease),transform .55s var(--ease);
}
.reveal-ready [data-reveal]:not(.is-visible){
  opacity:0;
  transform:translate3d(0,16px,0);
}
[data-reveal].is-visible{
  opacity:1;
  transform:none;
}

/* ---------- 按钮 ---------- */
.btn{
  --btn-bg:linear-gradient(180deg,var(--lamp-soft),var(--lamp));
  --btn-fg:#0B1622;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:9px;
  padding:13px 26px;
  border-radius:var(--pill);
  border:1px solid transparent;
  background:var(--btn-bg);
  color:var(--btn-fg);
  font-family:var(--font-brand);
  font-size:15px;
  font-weight:700;
  line-height:1.2;
  letter-spacing:.01em;
  text-decoration:none;
  cursor:pointer;
  box-shadow:0 10px 26px rgba(255,179,71,.26);
  transition:transform .22s var(--ease),box-shadow .22s var(--ease),
             background .22s var(--ease),color .22s var(--ease),
             border-color .22s var(--ease);
}
.btn:hover{
  transform:translateY(-2px);
  box-shadow:0 16px 34px rgba(255,179,71,.36);
  text-decoration:none;
}
.btn:active{transform:translateY(0)}

.btn--ghost{
  --btn-bg:rgba(34,56,77,.55);
  --btn-fg:var(--paper);
  border-color:rgba(245,247,250,.22);
  box-shadow:none;
}
.btn--ghost:hover{
  background:rgba(255,179,71,.14);
  border-color:var(--lamp);
  color:var(--lamp-soft);
  box-shadow:0 12px 28px rgba(0,0,0,.4);
}

.btn--mint{
  --btn-bg:linear-gradient(180deg,#5FE7A3,var(--mint));
  --btn-fg:#062015;
  box-shadow:0 10px 26px rgba(46,204,113,.24);
}
.btn--mint:hover{box-shadow:0 16px 32px rgba(46,204,113,.32)}

.btn--sm{padding:9px 18px;font-size:13.5px}

/* ---------- 标签 ---------- */
.tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:5px 12px;
  border-radius:var(--pill);
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.12em;
  text-transform:uppercase;
  background:rgba(255,179,71,.14);
  color:var(--lamp-soft);
  border:1px solid rgba(255,179,71,.32);
  white-space:nowrap;
}
.tag--mint{
  background:rgba(46,204,113,.12);
  color:#7BEBAE;
  border-color:rgba(46,204,113,.36);
}
.tag--neon{
  background:rgba(155,89,182,.16);
  color:#D8ACEB;
  border-color:rgba(155,89,182,.42);
}
.tag--ghost{
  background:rgba(245,247,250,.06);
  color:var(--silver);
  border-color:rgba(245,247,250,.16);
}

/* ---------- 面包屑 ---------- */
.breadcrumb{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  padding:20px 0 0;
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.12em;
  text-transform:uppercase;
  color:var(--silver);
}
.breadcrumb a{
  color:var(--silver);
  text-decoration:none;
  border-bottom:1px solid transparent;
  transition:color .2s var(--ease),border-color .2s var(--ease);
}
.breadcrumb a:hover{color:var(--lamp-soft);border-color:currentColor;text-decoration:none}
.breadcrumb-sep{color:rgba(245,247,250,.3)}
.breadcrumb [aria-current="page"]{color:var(--lamp-soft)}

/* ---------- Bento 网格 ---------- */
.bento-grid{
  display:grid;
  grid-template-columns:repeat(12,minmax(0,1fr));
  gap:clamp(12px,1.6vw,20px);
}
.bento-grid > *{grid-column:span 12;min-width:0}

@media (min-width:760px){
  .span-3{grid-column:span 3}
  .span-4{grid-column:span 4}
  .span-6{grid-column:span 6}
  .span-8{grid-column:span 8}
}

/* ---------- 卡片 ---------- */
.card{
  position:relative;
  border-radius:var(--r-lg);
  padding:clamp(18px,2.4vw,28px);
  background:linear-gradient(160deg,rgba(34,56,77,.94),rgba(26,42,58,.94));
  border:1px solid var(--line-soft);
  overflow:hidden;
  isolation:isolate;
  transition:transform .25s var(--ease),box-shadow .25s var(--ease),
             border-color .25s var(--ease);
}
.card::after{
  content:"";
  position:absolute;
  inset:0;
  border-radius:inherit;
  pointer-events:none;
  background:radial-gradient(240px 160px at 86% -12%,rgba(255,179,71,.16),transparent 70%);
}
.card:hover{
  transform:translateY(-2px);
  border-color:rgba(255,179,71,.4);
  box-shadow:0 18px 40px rgba(0,0,0,.45),
             0 0 0 1px rgba(255,179,71,.18),
             0 0 26px rgba(255,179,71,.14);
}
.card--flat{
  background:rgba(26,42,58,.72);
  border-color:var(--line);
}
.card--flat::after{display:none}
.card--lamp{
  border-color:var(--line-lamp);
  box-shadow:0 0 34px rgba(255,179,71,.16);
}

/* ---------- 图片容器（供页面阶段放置图片） ---------- */
.media-frame{
  position:relative;
  display:block;
  width:100%;
  aspect-ratio:16 / 10;
  border-radius:var(--r-lg);
  overflow:hidden;
  background:linear-gradient(150deg,#22384D 0%,#12212F 62%,#0B1622 100%);
  border:1px solid var(--line-soft);
  isolation:isolate;
}
.media-frame img{
  display:block;
  width:100%;
  height:100%;
  object-fit:cover;
}
.media-frame::before{
  content:"";
  position:absolute;
  inset:0;
  z-index:1;
  pointer-events:none;
  background:
    radial-gradient(62% 72% at 18% 0%,rgba(255,179,71,.26),transparent 64%),
    radial-gradient(52% 62% at 92% 100%,rgba(155,89,182,.22),transparent 66%);
}
.media-frame::after{
  content:"";
  position:absolute;
  inset:0;
  z-index:2;
  pointer-events:none;
  opacity:.45;
  background-image:
    linear-gradient(rgba(245,247,250,.06) 1px,transparent 1px),
    linear-gradient(90deg,rgba(245,247,250,.06) 1px,transparent 1px);
  background-size:40px 40px;
}
.media-frame--wide{aspect-ratio:21 / 9}
.media-frame--tall{aspect-ratio:4 / 5}
.media-frame--square{aspect-ratio:1 / 1}

.media-frame__label{
  position:absolute;
  left:16px;
  bottom:14px;
  z-index:3;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.16em;
  text-transform:uppercase;
  color:rgba(245,247,250,.72);
}

/* ==========================================================================
   页头
   ========================================================================== */
.site-header{
  position:sticky;
  top:0;
  z-index:80;
  background:linear-gradient(180deg,rgba(11,22,34,.98),rgba(13,26,40,.96));
  border-bottom:1px solid var(--line);
  box-shadow:0 18px 40px rgba(0,0,0,.42);
}

.progress-bar{
  position:absolute;
  left:0;
  top:0;
  width:0;
  height:2px;
  background:linear-gradient(90deg,var(--lamp),var(--lamp-soft));
  box-shadow:var(--glow-lamp);
  z-index:3;
  transition:width .12s linear;
}

.skip-link{
  position:fixed;
  top:10px;
  left:12px;
  z-index:300;
  padding:10px 20px;
  border-radius:var(--pill);
  background:var(--lamp);
  color:var(--ink-900);
  font-size:14px;
  font-weight:700;
  text-decoration:none;
  transform:translateY(-180%);
  transition:transform .22s var(--ease);
}
.skip-link:focus{
  transform:translateY(0);
  text-decoration:none;
}

/* 品牌说明层 */
.header-rail{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  min-height:var(--rail-h);
  padding:0 var(--gutter);
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.14em;
  color:var(--silver);
  border-bottom:1px dashed rgba(245,247,250,.1);
  background:linear-gradient(90deg,
    rgba(255,179,71,.10) 0%,
    rgba(155,89,182,.08) 46%,
    rgba(11,22,34,0) 100%);
}
.rail-coord{
  display:flex;
  align-items:center;
  gap:9px;
  min-width:0;
  margin:0;
  max-width:none;
  color:var(--lamp-soft);
  white-space:nowrap;
  overflow:hidden;
  text-overflow:ellipsis;
}
.rail-coord::before{
  content:"";
  flex:none;
  width:6px;
  height:6px;
  border-radius:50%;
  background:var(--lamp);
  box-shadow:0 0 10px var(--lamp),0 0 22px rgba(255,179,71,.6);
}
.rail-meta{
  display:flex;
  align-items:center;
  gap:18px;
  flex:none;
}
.rail-time{color:var(--silver)}
.rail-contact{
  color:rgba(245,247,250,.66);
  letter-spacing:.1em;
}

/* 主栏 */
.header-main{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:20px;
  width:100%;
  max-width:var(--shell);
  margin:0 auto;
  padding:10px var(--gutter) 12px;
}

.brand{
  display:inline-flex;
  align-items:center;
  gap:12px;
  color:var(--paper);
  text-decoration:none;
  flex:none;
}
.brand:hover{text-decoration:none}
.brand-mark{
  display:grid;
  place-items:center;
  width:36px;
  height:36px;
  flex:none;
  border-radius:12px;
  background:linear-gradient(160deg,var(--lamp-soft),var(--lamp));
  color:var(--ink-900);
  font-family:var(--font-brand);
  font-size:17px;
  font-weight:900;
  line-height:1;
  box-shadow:0 0 0 1px rgba(11,22,34,.55) inset,
             0 8px 22px rgba(255,179,71,.38);
}
.brand-text{
  display:flex;
  flex-direction:column;
  line-height:1.1;
}
.brand-name{
  font-size:19px;
  font-weight:900;
  letter-spacing:.02em;
}
.brand-sub{
  margin-top:3px;
  font-family:var(--font-mono);
  font-size:10px;
  letter-spacing:.22em;
  color:var(--silver);
}

/* 桌面胶囊索引导航 */
.primary-nav{display:none}

.nav-list{
  display:flex;
  align-items:center;
  gap:4px;
  padding:6px;
  border-radius:var(--pill);
  background:rgba(34,56,77,.62);
  border:1px solid var(--line);
  box-shadow:inset 0 1px 0 rgba(245,247,250,.06);
}

.nav-link{
  display:inline-flex;
  align-items:center;
  gap:7px;
  padding:8px 13px;
  border-radius:var(--pill);
  color:rgba(245,247,250,.78);
  font-size:14.5px;
  font-weight:500;
  white-space:nowrap;
  text-decoration:none;
  transition:color .2s var(--ease),background .2s var(--ease),
             box-shadow .2s var(--ease);
}
.nav-link:hover{
  color:var(--paper);
  background:rgba(255,179,71,.13);
  text-decoration:none;
}
.nav-index{
  font-family:var(--font-mono);
  font-size:10px;
  letter-spacing:.1em;
  color:var(--silver);
  opacity:.85;
  transition:color .2s var(--ease),opacity .2s var(--ease);
}
.nav-link:hover .nav-index{color:var(--lamp-soft);opacity:1}

.nav-link[aria-current="page"]{
  background:linear-gradient(180deg,var(--lamp-soft),var(--lamp));
  color:var(--ink-900);
  font-weight:700;
  box-shadow:0 6px 20px rgba(255,179,71,.34);
}
.nav-link[aria-current="page"] .nav-index{
  color:rgba(11,22,34,.72);
  opacity:1;
}

/* 移动端开关 */
.nav-toggle{
  display:inline-flex;
  align-items:center;
  gap:10px;
  padding:9px 15px;
  border-radius:var(--pill);
  border:1px solid rgba(245,247,250,.24);
  background:rgba(34,56,77,.72);
  color:var(--paper);
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.18em;
  text-transform:uppercase;
  transition:border-color .2s var(--ease),background .2s var(--ease);
}
.nav-toggle:hover{
  border-color:var(--lamp);
  background:rgba(255,179,71,.14);
}
.nav-toggle-bars{
  display:grid;
  gap:3px;
  width:16px;
}
.nav-toggle-bars span{
  display:block;
  height:2px;
  border-radius:2px;
  background:var(--lamp);
  transition:transform .25s var(--ease),opacity .2s var(--ease);
}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars span:nth-child(1){
  transform:translateY(5px) rotate(45deg);
}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars span:nth-child(2){
  opacity:0;
}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars span:nth-child(3){
  transform:translateY(-5px) rotate(-45deg);
}
.nav-toggle-text{line-height:1}

/* 双层抽屉 */
.nav-drawer{
  display:none;
  position:fixed;
  inset:0;
  z-index:200;
  background:rgba(5,11,18,.82);
}
.nav-drawer[data-open="true"]{display:block}

.drawer-panel{
  position:absolute;
  top:0;
  right:0;
  bottom:0;
  width:min(370px,90vw);
  display:flex;
  flex-direction:column;
  gap:18px;
  padding:20px 20px 28px;
  overflow-y:auto;
  background:linear-gradient(180deg,#0F1E2E 0%,#152636 58%,#0B1622 100%);
  border-left:1px solid var(--line-lamp);
  box-shadow:-24px 0 60px rgba(0,0,0,.62);
  animation:drawer-in .28s var(--ease) both;
}
@keyframes drawer-in{
  from{transform:translateX(24px);opacity:.4}
  to{transform:translateX(0);opacity:1}
}

.drawer-head{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  padding-bottom:12px;
  border-bottom:1px solid var(--line);
}
.drawer-title{
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.24em;
  text-transform:uppercase;
  color:var(--lamp-soft);
}
.drawer-close{
  display:grid;
  place-items:center;
  width:34px;
  height:34px;
  border-radius:50%;
  border:1px solid rgba(245,247,250,.22);
  background:rgba(34,56,77,.7);
  color:var(--paper);
  font-size:18px;
  line-height:1;
  transition:border-color .2s var(--ease),background .2s var(--ease);
}
.drawer-close:hover{
  border-color:var(--lamp);
  background:rgba(255,179,71,.16);
  color:var(--lamp-soft);
}

.drawer-tier{
  display:flex;
  flex-direction:column;
  gap:6px;
  padding:12px 14px;
  border-radius:var(--r-md);
  background:rgba(255,179,71,.08);
  border:1px solid rgba(255,179,71,.24);
}
.drawer-tier-label{
  font-family:var(--font-mono);
  font-size:10px;
  letter-spacing:.2em;
  text-transform:uppercase;
  color:var(--lamp-soft);
}
.drawer-tier-value{
  font-size:13.5px;
  line-height:1.65;
  color:rgba(245,247,250,.82);
}

.drawer-list{
  display:flex;
  flex-direction:column;
  gap:6px;
}
.drawer-link{
  display:flex;
  align-items:center;
  gap:12px;
  padding:13px 15px;
  border-radius:var(--r-md);
  border:1px solid transparent;
  color:rgba(245,247,250,.86);
  font-size:16px;
  font-weight:600;
  text-decoration:none;
  transition:background .2s var(--ease),border-color .2s var(--ease),
             color .2s var(--ease);
}
.drawer-link:hover{
  background:rgba(255,179,71,.1);
  border-color:rgba(255,179,71,.32);
  color:var(--paper);
  text-decoration:none;
}
.drawer-link[aria-current="page"]{
  background:rgba(255,179,71,.16);
  border-color:var(--lamp);
  color:var(--lamp-soft);
  box-shadow:inset 3px 0 0 var(--lamp);
}
.drawer-link[aria-current="page"] .nav-index{color:var(--lamp);opacity:1}

.drawer-meta{
  display:flex;
  flex-direction:column;
  gap:6px;
  margin-top:auto;
  padding-top:16px;
  border-top:1px dashed rgba(245,247,250,.16);
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.09em;
  line-height:1.8;
  color:var(--silver);
  word-break:break-all;
}

@media (min-width:900px){
  .primary-nav{display:block}
  .nav-toggle{display:none}
  .nav-drawer{display:none !important}
}
@media (min-width:900px) and (max-width:1179px){
  .nav-link{padding:7px 10px;font-size:13.5px}
  .nav-index{display:none}
}

/* ==========================================================================
   页脚
   ========================================================================== */
.site-footer{
  position:relative;
  margin-top:clamp(56px,8vw,110px);
  overflow:hidden;
  color:rgba(245,247,250,.78);
  background:linear-gradient(180deg,#0B1622 0%,#0F1E2E 42%,#0B1622 100%);
  border-top:1px solid var(--line-lamp);
  box-shadow:0 -1px 0 rgba(255,179,71,.16);
}
.site-footer::before{
  content:"";
  position:absolute;
  inset:0;
  pointer-events:none;
  background:
    radial-gradient(700px 300px at 78% 0%,rgba(255,179,71,.16),transparent 68%),
    radial-gradient(540px 320px at 4% 100%,rgba(155,89,182,.14),transparent 70%);
}

.footer-palm{
  position:absolute;
  right:clamp(6px,4vw,72px);
  bottom:-6px;
  width:190px;
  height:158px;
  pointer-events:none;
  opacity:.22;
}
.footer-palm::before{
  content:"";
  position:absolute;
  left:50%;
  bottom:0;
  width:9px;
  height:112px;
  border-radius:6px;
  transform:translateX(-50%) rotate(3deg);
  background:linear-gradient(180deg,#000 0%,#000 78%,rgba(0,0,0,0) 100%);
}
.footer-palm::after{
  content:"";
  position:absolute;
  left:50%;
  top:6px;
  width:176px;
  height:92px;
  transform:translateX(-50%);
  background:
    radial-gradient(ellipse 48px 15px at 10% 80%,#000 96%,transparent 100%),
    radial-gradient(ellipse 52px 16px at 29% 44%,#000 96%,transparent 100%),
    radial-gradient(ellipse 56px 17px at 50% 22%,#000 96%,transparent 100%),
    radial-gradient(ellipse 52px 16px at 71% 44%,#000 96%,transparent 100%),
    radial-gradient(ellipse 48px 15px at 90% 80%,#000 96%,transparent 100%);
}

.footer-main{
  position:relative;
  z-index:1;
  display:grid;
  grid-template-columns:1fr;
  gap:clamp(26px,4vw,44px);
  width:100%;
  max-width:var(--shell);
  margin:0 auto;
  padding:clamp(38px,5.5vw,68px) var(--gutter) 30px;
}
@media (min-width:820px){
  .footer-main{grid-template-columns:1.4fr .85fr .85fr 1.2fr;align-items:start}
}

.footer-brand{
  display:flex;
  flex-direction:column;
  gap:14px;
  min-width:0;
}
.footer-tagline{
  font-size:15px;
  line-height:1.85;
  color:rgba(245,247,250,.72);
  max-width:32ch;
  margin:0;
}
.footer-note{
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.08em;
  line-height:1.8;
  color:var(--silver);
  margin:0;
  word-break:break-all;
}

.footer-col{min-width:0}
.footer-col-title{
  margin:0 0 14px;
  font-family:var(--font-mono);
  font-size:11px;
  font-weight:500;
  letter-spacing:.2em;
  text-transform:uppercase;
  color:var(--lamp-soft);
}
.footer-list{
  display:grid;
  gap:10px;
}
.footer-list a{
  display:inline-flex;
  align-items:center;
  gap:9px;
  font-size:14.5px;
  color:rgba(245,247,250,.76);
  text-decoration:none;
  transition:color .2s var(--ease);
}
.footer-list a::before{
  content:"";
  flex:none;
  width:5px;
  height:5px;
  border-radius:50%;
  background:rgba(255,179,71,.5);
  transition:background .2s var(--ease),box-shadow .2s var(--ease);
}
.footer-list a:hover{color:var(--lamp-soft);text-decoration:none}
.footer-list a:hover::before{
  background:var(--lamp);
  box-shadow:0 0 10px var(--lamp);
}

.footer-contact{
  display:grid;
  gap:12px;
  margin:0;
}
.footer-contact-item{min-width:0}
.footer-contact dt{
  font-family:var(--font-mono);
  font-size:10.5px;
  letter-spacing:.16em;
  text-transform:uppercase;
  color:var(--silver);
  margin-bottom:3px;
}
.footer-contact dd{
  margin:0;
  font-size:14px;
  line-height:1.7;
  color:rgba(245,247,250,.9);
  word-break:break-all;
}

.footer-wordmark{
  position:relative;
  z-index:1;
  width:100%;
  max-width:var(--shell);
  margin:0 auto;
  padding:0 var(--gutter) 6px;
  font-family:var(--font-brand);
  font-weight:900;
  font-size:clamp(34px,8.4vw,112px);
  line-height:.92;
  letter-spacing:-.03em;
  white-space:nowrap;
  overflow:hidden;
  color:transparent;
  -webkit-text-stroke:1px rgba(245,247,250,.1);
}

.footer-legal{
  position:relative;
  z-index:1;
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:8px 22px;
  width:100%;
  max-width:var(--shell);
  margin:0 auto;
  padding:16px var(--gutter) 30px;
  border-top:1px solid rgba(245,247,250,.1);
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.09em;
  line-height:1.8;
  color:var(--silver);
}
.footer-legal a{color:rgba(245,247,250,.7);text-decoration:none}
.footer-legal a:hover{color:var(--lamp-soft);text-decoration:none}

/* ==========================================================================
   响应式与无障碍
   ========================================================================== */
@media (max-width:899px){
  .header-main{padding:9px var(--gutter) 11px}
  .brand-name{font-size:17.5px}
  .brand-mark{width:32px;height:32px;border-radius:11px;font-size:15px}
}

@media (max-width:639px){
  body{font-size:16px;line-height:1.8}
  .rail-meta{display:none}
  .header-rail{font-size:10.5px;letter-spacing:.1em}
  .brand-sub{font-size:9px;letter-spacing:.18em}
  .footer-legal{font-size:10.5px;letter-spacing:.06em}
  .footer-palm{opacity:.16;right:-20px}
}

@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto}
  *,
  *::before,
  *::after{
    animation-duration:.01ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.01ms !important;
  }
  .reveal-ready [data-reveal]:not(.is-visible){
    opacity:1;
    transform:none;
  }
  .card:hover,
  .btn:hover{transform:none}
  .progress-bar{transition:none}
}