/* ==========================================================================
   龙腾娱乐 · Site Kit 共享样式  /assets/site.css
   深曜黑基底 + 赤金点睛 + 龙鳞/梯田矢量纹样，全部由渐变生成
   ========================================================================== */

/* ---------- 1. Reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;text-size-adjust:100%}
body,h1,h2,h3,h4,h5,p,ul,ol,li,figure,blockquote,dl,dd{margin:0;padding:0}
ul,ol{list-style:none}
a{color:inherit;text-decoration:none}
button,input,select,textarea{font:inherit;color:inherit;background:none;border:0}
button{cursor:pointer}
img,svg,video{display:block;max-width:100%}
table{border-collapse:collapse;width:100%}

/* ---------- 2. 设计变量 ---------- */
:root{
  /* 色板 */
  --obsidian:#0B0C0E;
  --ink:#15171B;
  --ink-deep:#0F1114;
  --paper:#E9E7E2;
  --paper-soft:#F4F2EE;
  --stone:#6E7278;
  --gold:#C9A24A;
  --gold-deep:#A9822F;
  --gold-soft:#F2CC77;
  --peacock:#12A08A;
  --peacock-soft:#5FD3C0;
  --sunset:#E0763A;
  --sunset-soft:#F0A06D;
  --mist:#A9B4BD;
  --terrace:#24322F;

  /* 语义文字 */
  --text-1:#E9E7E2;
  --text-2:#A9B4BD;
  --text-3:#6E7278;
  --text-ink-1:#15171B;
  --text-ink-2:#4C5257;

  /* 极细边界 */
  --hair:rgba(233,231,226,.14);
  --hair-strong:rgba(233,231,226,.26);
  --hair-ink:rgba(21,23,27,.14);

  /* 字体 */
  --font-heading:"Noto Serif SC","Source Han Serif SC","Songti SC","STSong",serif;
  --font-accent:"Noto Sans SC","Source Han Sans SC","PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",sans-serif;
  --font-body:"Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",Inter,"Segoe UI",system-ui,-apple-system,sans-serif;

  /* 尺寸与节奏 */
  --header-h:68px;
  --shell:1200px;
  --gap:clamp(1rem,2.2vw,1.75rem);
  --radius:2px;
  --ease:cubic-bezier(.22,.68,.2,1);
  --shadow-card:0 18px 40px -32px rgba(0,0,0,.95);
  --glow-ring:0 0 0 1px rgba(242,204,119,.42),0 0 24px -8px rgba(242,204,119,.6);

  /* 矢量纹样：龙鳞 + 梯田等高线 */
  --pattern-scale:
    repeating-linear-gradient(58deg, rgba(233,231,226,.055) 0 1px, transparent 1px 19px),
    repeating-linear-gradient(-58deg, rgba(233,231,226,.042) 0 1px, transparent 1px 19px),
    repeating-linear-gradient(0deg, rgba(201,162,74,.05) 0 1px, transparent 1px 38px);
  --pattern-contour:
    repeating-linear-gradient(92deg, rgba(233,231,226,.05) 0 1px, transparent 1px 46px),
    repeating-linear-gradient(2deg, rgba(233,231,226,.038) 0 1px, transparent 1px 32px);
}

@media (max-width:560px){
  :root{--header-h:60px}
}

@media (prefers-reduced-motion: no-preference){
  html{scroll-behavior:smooth}
}

/* ---------- 3. 基础排版 ---------- */
body{
  min-height:100vh;
  padding-top:var(--header-h);
  background:var(--obsidian);
  color:var(--text-1);
  font-family:var(--font-body);
  font-size:17px;
  line-height:1.75;
  font-weight:400;
  letter-spacing:.008em;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
  overflow-x:hidden;
}
body.is-nav-open{overflow:hidden}

h1,h2,h3{font-family:var(--font-heading);font-weight:700;letter-spacing:-.01em;line-height:1.24}
h1{font-size:clamp(2.05rem,4.6vw,3.4rem)}
h2{font-size:clamp(1.5rem,2.8vw,2.125rem)}
h3{font-size:1.375rem;line-height:1.35}
h4{font-family:var(--font-accent);font-weight:700;font-size:1.0625rem;letter-spacing:.06em;line-height:1.5}

::selection{background:rgba(201,162,74,.34);color:#FFF8E6}

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

#main-content{display:block;scroll-margin-top:calc(var(--header-h) + 16px)}

/* ---------- 4. 通用工具 ---------- */
.sr-only{
  position:absolute;width:1px;height:1px;padding:0;margin:-1px;
  overflow:hidden;clip:rect(0 0 0 0);clip-path:inset(50%);white-space:nowrap;border:0;
}
.shell{width:100%;max-width:var(--shell);margin-inline:auto;padding-inline:clamp(1rem,3.2vw,2.5rem)}
.shell--narrow{max-width:820px}
.shell--wide{max-width:1360px}
.hairline{height:1px;background:linear-gradient(90deg,transparent,var(--hair-strong),transparent)}

/* ---------- 5. 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:.5rem;
  padding:.62rem 1.15rem;
  border:1px solid transparent;
  border-radius:var(--radius);
  font-family:var(--font-accent);
  font-size:.8125rem;font-weight:700;letter-spacing:.06em;line-height:1.4;
  white-space:nowrap;
  transition:transform .16s var(--ease),box-shadow .12s var(--ease),
             background-color .16s var(--ease),border-color .16s var(--ease),color .16s var(--ease);
}
.btn-gold{
  background:linear-gradient(135deg,var(--gold-soft),var(--gold) 45%,var(--gold-deep));
  color:#0B0C0E;
  border-color:rgba(242,204,119,.45);
}
.btn-gold:hover{transform:translateY(-1px);box-shadow:var(--glow-ring);color:#0B0C0E}
.btn-quiet{
  border-color:var(--hair-strong);
  color:var(--text-1);
  background:rgba(233,231,226,.02);
}
.btn-quiet:hover{transform:translateY(-1px);border-color:rgba(242,204,119,.6);color:var(--gold-soft)}
.btn-block{width:100%}
.btn:active{transform:translateY(0)}

/* ---------- 6. Skip link ---------- */
.skip-link{
  position:fixed;top:.6rem;left:.6rem;z-index:140;
  padding:.6rem 1rem;
  background:var(--gold-soft);color:#0B0C0E;
  font-family:var(--font-accent);font-size:.8125rem;font-weight:700;letter-spacing:.08em;
  border-radius:var(--radius);
  transform:translateY(-180%);
  transition:transform .18s var(--ease);
}
.skip-link:focus{transform:translateY(0)}

/* ---------- 7. 页头 ---------- */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:80;
  height:var(--header-h);
  background:rgba(11,12,14,.84);
  backdrop-filter:blur(16px) saturate(1.15);
  -webkit-backdrop-filter:blur(16px) saturate(1.15);
  border-bottom:1px solid var(--hair);
  transition:background-color .24s var(--ease),border-color .24s var(--ease);
}
.site-header::after{
  content:"";position:absolute;left:0;right:0;bottom:-1px;height:1px;
  background:linear-gradient(90deg,transparent,rgba(201,162,74,.55) 22%,rgba(18,160,138,.32) 62%,transparent);
  opacity:.75;pointer-events:none;
}
body[data-condensed] .site-header{
  background:rgba(8,9,11,.94);
  border-bottom-color:rgba(233,231,226,.08);
}

.header-inner{
  display:grid;
  grid-template-columns:auto minmax(0,1fr) auto;
  align-items:center;
  gap:clamp(.9rem,3vw,2.5rem);
  height:100%;
  width:100%;max-width:var(--shell);
  margin-inline:auto;
  padding-inline:clamp(1rem,3.2vw,2.5rem);
}

.brand{display:flex;flex-direction:column;gap:1px;min-width:0}
.brand-mark{
  font-family:var(--font-heading);font-size:1.3125rem;font-weight:700;
  letter-spacing:.1em;color:var(--paper);line-height:1.2;
  transition:color .18s var(--ease);
}
.brand:hover .brand-mark{color:var(--gold-soft)}
.brand-descriptor{
  font-family:var(--font-accent);font-size:.6875rem;font-weight:500;
  letter-spacing:.2em;color:var(--mist);line-height:1.4;
  transition:opacity .2s var(--ease);
}
body[data-condensed] .brand-descriptor{opacity:.42}

.header-meter{display:flex;align-items:center;gap:.85rem;min-width:0}
.header-meter-track{
  position:relative;flex:1 1 auto;height:1px;min-width:60px;
  background:var(--hair);overflow:hidden;
}
.header-meter-bar{
  position:absolute;top:0;left:0;width:100%;height:100%;
  transform:scaleX(0);transform-origin:0 50%;
  background:linear-gradient(90deg,var(--gold),var(--gold-soft));
  box-shadow:0 0 10px rgba(242,204,119,.55);
}
.header-meter-value{
  flex:0 0 auto;min-width:3.4em;text-align:right;
  font-family:var(--font-accent);font-size:.6875rem;font-weight:700;
  letter-spacing:.14em;color:var(--mist);
  font-variant-numeric:tabular-nums;
}

.header-actions{display:flex;align-items:center;gap:.55rem}

/* 栏目开关 */
.nav-toggle{
  display:inline-flex;align-items:center;gap:.6rem;
  padding:.5rem .75rem;
  border:1px solid var(--hair-strong);
  border-radius:var(--radius);
  color:var(--text-1);
  transition:border-color .16s var(--ease),background-color .16s var(--ease),box-shadow .12s var(--ease);
}
.nav-toggle:hover{border-color:rgba(242,204,119,.62);box-shadow:var(--glow-ring)}
.nav-toggle-bars{display:inline-flex;flex-direction:column;justify-content:space-between;width:16px;height:11px}
.nav-toggle-bars i{
  display:block;width:100%;height:1px;background:currentColor;
  transition:transform .24s var(--ease),opacity .18s var(--ease);
}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars i:nth-child(1){transform:translateY(5px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars i:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars i:nth-child(3){transform:translateY(-5px) rotate(-45deg)}
.nav-toggle-label{
  font-family:var(--font-accent);font-size:.75rem;font-weight:700;
  letter-spacing:.16em;color:var(--mist);
}

/* ---------- 8. 右侧浮层导航 ---------- */
.nav-drawer{
  position:fixed;inset:0;z-index:100;
  display:flex;justify-content:flex-end;
  background:rgba(8,9,11,.62);
  backdrop-filter:blur(3px);
  -webkit-backdrop-filter:blur(3px);
  opacity:0;visibility:hidden;
  transition:opacity .24s var(--ease),visibility .24s linear;
}
.nav-drawer[data-open]{opacity:1;visibility:visible}

.nav-panel{
  display:flex;flex-direction:column;gap:1.75rem;
  width:min(92vw,410px);height:100%;
  padding:calc(var(--header-h) + 1.5rem) clamp(1.25rem,4vw,2rem) 2.25rem;
  overflow-y:auto;
  background-color:var(--ink-deep);
  background-image:var(--pattern-scale);
  border-left:1px solid var(--hair);
  box-shadow:-40px 0 80px -60px rgba(0,0,0,.95);
  transform:translateX(100%);
  transition:transform .28s var(--ease);
}
.nav-drawer[data-open] .nav-panel{transform:translateX(0)}

.nav-panel-head{display:flex;align-items:center;justify-content:space-between;gap:1rem}
.nav-panel-title{
  font-family:var(--font-accent);font-size:.6875rem;font-weight:700;
  letter-spacing:.28em;color:var(--gold);
}
.nav-close{
  padding:.35rem .7rem;
  border:1px solid var(--hair-strong);border-radius:var(--radius);
  font-family:var(--font-accent);font-size:.6875rem;letter-spacing:.14em;color:var(--mist);
  transition:border-color .16s var(--ease),color .16s var(--ease);
}
.nav-close:hover{border-color:rgba(242,204,119,.6);color:var(--gold-soft)}

.nav-list{counter-reset:nav-index;border-top:1px solid var(--hair)}
.nav-link{
  display:grid;grid-template-columns:2.1rem minmax(0,1fr) auto;
  align-items:baseline;gap:.75rem;
  padding:.85rem .25rem;
  border-bottom:1px solid var(--hair);
  font-family:var(--font-heading);font-size:1.125rem;color:var(--text-1);
  transition:color .18s var(--ease),padding-left .18s var(--ease),background-color .18s var(--ease);
}
.nav-link::before{
  counter-increment:nav-index;content:"0" counter(nav-index);
  font-family:var(--font-accent);font-size:.6875rem;font-weight:700;
  letter-spacing:.16em;color:var(--text-3);
  font-variant-numeric:tabular-nums;
}
.nav-link::after{
  content:"";width:6px;height:6px;align-self:center;
  border-top:1px solid currentColor;border-right:1px solid currentColor;
  transform:rotate(45deg);opacity:.45;
  transition:opacity .18s var(--ease);
}
.nav-link:hover{color:var(--gold-soft);background-color:rgba(201,162,74,.05)}
.nav-link:hover::after{opacity:.95}
.nav-link[aria-current="page"]{
  color:var(--gold-soft);
  padding-left:.9rem;
  background:linear-gradient(90deg,rgba(201,162,74,.16),transparent 72%);
}
.nav-link[aria-current="page"]::before{color:var(--gold)}
.nav-link[aria-current="page"]::after{opacity:.9}

.nav-panel-foot{display:flex;flex-direction:column;gap:.6rem;margin-top:auto}
.nav-note{
  font-size:.8125rem;line-height:1.7;color:var(--text-3);
  word-break:break-all;
}

/* 竖向导轨 */
.nav-rail{
  position:fixed;right:0;top:50%;z-index:90;
  padding:.95rem .32rem;
  border:1px solid var(--hair-strong);border-right:0;
  border-radius:2px 0 0 2px;
  background-color:rgba(15,17,20,.92);
  backdrop-filter:blur(10px);
  -webkit-backdrop-filter:blur(10px);
  opacity:0;visibility:hidden;
  transform:translate(100%,-50%);
  transition:opacity .24s var(--ease),transform .24s var(--ease),
             visibility .24s linear,box-shadow .12s var(--ease);
}
body[data-condensed] .nav-rail{opacity:1;visibility:visible;transform:translate(0,-50%)}
.nav-rail:hover{box-shadow:var(--glow-ring)}
.nav-rail-text{
  writing-mode:vertical-rl;text-orientation:upright;
  font-family:var(--font-accent);font-size:.75rem;font-weight:700;
  letter-spacing:.4em;color:var(--gold-soft);
}

/* ---------- 9. 页脚 ---------- */
.site-footer{
  position:relative;
  margin-top:clamp(3rem,7vw,6rem);
  background-color:var(--terrace);
  background-image:
    radial-gradient(120% 90% at 8% 0%, rgba(201,162,74,.13), transparent 58%),
    radial-gradient(90% 80% at 92% 6%, rgba(18,160,138,.1), transparent 55%),
    var(--pattern-contour);
  color:var(--text-1);
  border-top:1px solid rgba(201,162,74,.26);
  overflow:hidden;
}
.site-footer::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:linear-gradient(180deg,rgba(11,12,14,.35),rgba(11,12,14,.72) 70%,rgba(11,12,14,.9));
}

.footer-inner{
  position:relative;z-index:1;
  display:grid;
  grid-template-columns:minmax(200px,1.1fr) minmax(0,2.2fr) minmax(230px,1.25fr);
  gap:clamp(2rem,4.5vw,3.5rem);
  width:100%;max-width:var(--shell);
  margin-inline:auto;
  padding:clamp(2.75rem,6vw,4.5rem) clamp(1rem,3.2vw,2.5rem) clamp(1.75rem,3vw,2.5rem);
}

.footer-brand{display:flex;flex-direction:column;gap:1rem}
.footer-mark{
  font-family:var(--font-heading);font-size:1.5rem;font-weight:700;
  letter-spacing:.12em;color:var(--paper);
}
.footer-summary{font-size:.9375rem;line-height:1.8;color:var(--mist);max-width:30em}
.footer-tags{display:flex;flex-wrap:wrap;gap:.45rem}

.footer-grid{
  display:grid;
  grid-template-columns:repeat(4,minmax(0,1fr));
  gap:clamp(1rem,2.2vw,1.75rem);
}
.footer-col{display:flex;flex-direction:column;gap:.85rem}
.footer-col-title{
  font-family:var(--font-accent);font-size:.6875rem;font-weight:700;
  letter-spacing:.24em;color:var(--gold);
}
.footer-links{display:flex;flex-direction:column;gap:.5rem}
.footer-link{
  display:inline-block;
  font-size:.9375rem;color:var(--mist);
  transition:color .16s var(--ease),transform .16s var(--ease);
}
.footer-link:hover{color:var(--gold-soft);transform:translateX(3px)}

.footer-contact{display:flex;flex-direction:column;gap:.85rem}
.footer-contact-list{display:flex;flex-direction:column;gap:.7rem}
.footer-contact-item{display:flex;flex-direction:column;gap:.15rem}
.footer-contact-label{
  font-family:var(--font-accent);font-size:.625rem;font-weight:700;
  letter-spacing:.2em;color:var(--text-3);
}
.footer-contact-value{
  font-size:.875rem;line-height:1.7;color:var(--paper);
  word-break:break-word;font-variant-numeric:tabular-nums;
}
.footer-note{
  margin-top:.35rem;padding-left:.8rem;
  border-left:2px solid rgba(224,118,58,.55);
  font-size:.8125rem;line-height:1.75;color:var(--mist);
}

.footer-bottom{
  position:relative;z-index:1;
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:.75rem;
  width:100%;max-width:var(--shell);
  margin-inline:auto;
  padding:1.1rem clamp(1rem,3.2vw,2.5rem) 1.5rem;
  border-top:1px solid rgba(233,231,226,.1);
  font-family:var(--font-accent);font-size:.75rem;letter-spacing:.08em;color:var(--text-3);
}
.footer-legal,.footer-copy{font-variant-numeric:tabular-nums}

/* ---------- 10. 页面级布局基元 ---------- */
.section{padding-block:clamp(2.5rem,6vw,5rem)}
.section-head{
  display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;
  gap:1rem;margin-bottom:clamp(1.5rem,3vw,2.25rem);
}
.eyebrow{
  display:inline-block;
  font-family:var(--font-accent);font-size:.6875rem;font-weight:700;
  letter-spacing:.28em;color:var(--gold);text-transform:uppercase;
}
.section-title{font-family:var(--font-heading);font-weight:700;line-height:1.25}
.lede{font-size:1.0625rem;line-height:1.85;color:var(--mist);max-width:36em}

.prose{color:var(--text-1)}
.prose p{max-width:36em;margin-bottom:1.15em}
.prose p:last-child{margin-bottom:0}
.prose h2,.prose h3{margin:1.8em 0 .7em}
.prose ul{max-width:36em;margin-bottom:1.15em;display:flex;flex-direction:column;gap:.4rem}
.prose li{padding-left:1.1em;position:relative}
.prose li::before{content:"";position:absolute;left:0;top:.85em;width:5px;height:1px;background:var(--gold)}
.prose--paper{color:var(--text-ink-1)}
.prose--paper .lede{color:var(--text-ink-2)}

.surface{
  background:linear-gradient(180deg,var(--ink),var(--ink-deep));
  border:1px solid var(--hair);
  border-radius:var(--radius);
  padding:clamp(1.25rem,3vw,2rem);
}
.surface--paper{
  background:var(--paper);
  border-color:var(--hair-ink);
  color:var(--text-ink-1);
}

.grid{display:grid;gap:var(--gap)}
.grid--2{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid--3{grid-template-columns:repeat(3,minmax(0,1fr))}
.grid--4{grid-template-columns:repeat(4,minmax(0,1fr))}
.grid--auto{grid-template-columns:repeat(auto-fit,minmax(250px,1fr))}

/* ---------- 11. 卡片 / 标签 / 数据 ---------- */
.card{
  position:relative;
  display:flex;flex-direction:column;gap:.7rem;
  padding:clamp(1.15rem,2.4vw,1.6rem);
  background:linear-gradient(180deg,var(--ink),var(--ink-deep));
  border:1px solid var(--hair);
  border-radius:var(--radius);
  transition:transform .18s var(--ease),border-color .12s var(--ease),box-shadow .12s var(--ease);
}
.card:hover{
  transform:translateY(-4px);
  border-color:rgba(242,204,119,.4);
  box-shadow:var(--glow-ring),var(--shadow-card);
}
.card-title{font-family:var(--font-heading);font-size:1.125rem;font-weight:700;line-height:1.4}
.card-text{font-size:.9375rem;line-height:1.75;color:var(--mist)}
.card-meta{
  font-family:var(--font-accent);font-size:.6875rem;font-weight:700;
  letter-spacing:.18em;color:var(--text-3);font-variant-numeric:tabular-nums;
}

.tag{
  display:inline-flex;align-items:center;gap:.35rem;
  padding:.2rem .6rem;
  border:1px solid var(--hair-strong);border-radius:999px;
  font-family:var(--font-accent);font-size:.6875rem;font-weight:500;
  letter-spacing:.12em;color:var(--mist);
}
.tag--gold{border-color:rgba(201,162,74,.55);color:var(--gold-soft)}
.tag--peacock{border-color:rgba(18,160,138,.5);color:var(--peacock-soft)}
.tag--sunset{border-color:rgba(224,118,58,.5);color:var(--sunset-soft)}

.stat{display:flex;flex-direction:column;gap:.3rem}
.stat-value{
  font-family:var(--font-accent);font-weight:800;
  font-size:clamp(1.75rem,4vw,2.5rem);letter-spacing:.02em;line-height:1.1;
  background:linear-gradient(120deg,var(--gold-soft),var(--gold) 60%,var(--gold-deep));
  -webkit-background-clip:text;background-clip:text;color:transparent;
  font-variant-numeric:tabular-nums;
}
.stat-label{font-size:.8125rem;letter-spacing:.1em;color:var(--mist)}

.callout{
  border-left:2px solid var(--gold);
  background:rgba(201,162,74,.07);
  padding:.9rem 1.1rem;
  font-size:.9375rem;line-height:1.75;color:var(--text-1);
}
.callout--peacock{border-left-color:var(--peacock);background:rgba(18,160,138,.08)}
.callout--sunset{border-left-color:var(--sunset);background:rgba(224,118,58,.09)}

.timeline{
  display:flex;flex-direction:column;
  margin-left:.45rem;padding-left:1.15rem;
  border-left:1px solid var(--hair);
}
.timeline-item{position:relative;padding:.6rem 0 .95rem}
.timeline-item::before{
  content:"";position:absolute;left:calc(-1.15rem - 3.5px);top:1.05rem;
  width:6px;height:6px;border-radius:50%;
  background:var(--gold);box-shadow:0 0 0 3px rgba(201,162,74,.14);
}
.timeline-time{
  display:block;
  font-family:var(--font-accent);font-size:.6875rem;font-weight:700;
  letter-spacing:.16em;color:var(--mist);
  font-variant-numeric:tabular-nums;
}

/* ---------- 12. 面包屑 ---------- */
.breadcrumbs{font-size:.8125rem}
.breadcrumb-list{display:flex;flex-wrap:wrap;align-items:center;gap:.45rem;color:var(--mist)}
.breadcrumb-list li{display:inline-flex;align-items:center;gap:.45rem}
.breadcrumb-list li+li::before{content:"/";color:var(--text-3)}
.breadcrumb-list a{transition:color .16s var(--ease)}
.breadcrumb-list a:hover{color:var(--gold-soft)}
.breadcrumb-list [aria-current="page"]{color:var(--paper)}

/* ---------- 13. 图片容器（页面阶段放 <img>） ---------- */
.media-frame{
  position:relative;overflow:hidden;
  aspect-ratio:16 / 10;
  border:1px solid var(--hair);
  border-radius:var(--radius);
  background-color:var(--ink-deep);
  background-image:var(--pattern-scale);
  isolation:isolate;
}
.media-frame > img{
  width:100%;height:100%;object-fit:cover;
  filter:saturate(.96) contrast(1.04);
}
.media-frame::after{
  content:"";position:absolute;left:18%;right:-25%;bottom:-45%;height:70%;
  background:radial-gradient(closest-side,rgba(242,204,119,.2),transparent 72%);
  pointer-events:none;z-index:1;
}
.media-frame--wide{aspect-ratio:21 / 9}
.media-frame--tall{aspect-ratio:4 / 5}
.media-frame--square{aspect-ratio:1 / 1}
.media-frame--paper{
  border-color:var(--hair-ink);
  background-color:var(--paper);
  background-image:
    repeating-linear-gradient(92deg, rgba(21,23,27,.05) 0 1px, transparent 1px 42px),
    repeating-linear-gradient(2deg, rgba(21,23,27,.04) 0 1px, transparent 1px 30px);
}
.media-frame--scale{background-image:var(--pattern-scale),radial-gradient(70% 60% at 78% 22%,rgba(18,160,138,.16),transparent 70%)}
.media-caption{display:block;margin-top:.6rem;font-size:.8125rem;line-height:1.7;color:var(--mist)}

/* ---------- 14. 滚动显现 ---------- */
html.js-ready [data-reveal]{
  opacity:0;transform:translateY(16px);
  transition:opacity .55s var(--ease),transform .55s var(--ease);
}
html.js-ready [data-reveal][data-revealed]{opacity:1;transform:none}

/* ---------- 15. 响应式 ---------- */
@media (max-width:1080px){
  .header-meter{display:none}
  .header-inner{grid-template-columns:auto 1fr}
  .header-actions{justify-self:end}
}

@media (max-width:980px){
  .footer-inner{grid-template-columns:1fr;gap:2.5rem}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:1.75rem}
}

@media (max-width:860px){
  .header-actions .btn{display:none}
  .grid--3,.grid--4{grid-template-columns:repeat(2,minmax(0,1fr))}
}

@media (max-width:720px){
  body{font-size:16.5px;line-height:1.78}
  .nav-panel{width:min(100%,420px)}
  .grid--2,.grid--3,.grid--4{grid-template-columns:minmax(0,1fr)}
  .section-head{align-items:flex-start;flex-direction:column}
}

@media (max-width:560px){
  .brand-descriptor{display:none}
  .brand-mark{font-size:1.1875rem}
  .header-inner{gap:.75rem}
  .nav-panel{width:100%;border-left:0}
  .footer-grid{grid-template-columns:minmax(0,1fr);gap:1.5rem}
  .footer-bottom{flex-direction:column;align-items:flex-start;gap:.4rem}
  .media-caption{font-size:.75rem}
}

/* ---------- 16. 降低动效偏好 ---------- */
@media (prefers-reduced-motion: reduce){
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
    transition-delay:0ms !important;
    scroll-behavior:auto !important;
  }
  html.js-ready [data-reveal]{opacity:1;transform:none}
  .card:hover{transform:none}
  .footer-link:hover{transform:none}
  .nav-rail{transition:none}
}