/* ============================================================
   大发黄金 DAFABET · 共享站点样式 /assets/site.css
   玄金黑基底 · 深靛蓝分区 · 主金焦点 · 等高线秩序感
   ============================================================ */

/* ---------- 1. 令牌 ---------- */
:root{
  --ink:#0B0F1A;
  --indigo:#141F3D;
  --indigo-2:#22305C;
  --gold:#C9A227;
  --gold-light:#F2D57E;
  --gold-dark:#8A6A12;
  --amber:#FF8A3D;
  --cyan:#3FC5D6;
  --cream:#F7F4EC;
  --mist:#9AA3BD;

  --rail:88px;
  --shell-max:1360px;
  --gutter:72px;
  --gap:24px;
  --head-space:136px;

  --radius-lg:22px;
  --radius-md:14px;
  --radius-pill:999px;

  --font-sans:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-serif:"Songti SC","Source Han Serif SC","Noto Serif SC","SimSun",Georgia,serif;
  --font-mono:ui-monospace,"SF Mono","JetBrains Mono",Consolas,"Liberation Mono",monospace;

  --line:rgba(154,163,189,.20);
  --line-gold:rgba(201,162,39,.34);
  --shadow:0 20px 50px rgba(4,7,15,.48);
  --ease:cubic-bezier(.22,.61,.36,1);
}

/* ---------- 2. Reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;background:var(--ink)}
body,h1,h2,h3,h4,h5,p,ul,ol,li,figure,blockquote,dl,dd,fieldset{margin:0;padding:0}
ul,ol{list-style:none}
img,svg{display:block;max-width:100%}
button,input{font:inherit;color:inherit}
button{background:none;border:0;cursor:pointer}
a{color:inherit;text-decoration:none}
table{border-collapse:collapse;width:100%}
[hidden]{display:none !important}

/* ---------- 3. 基础排版与色彩节奏 ---------- */
body{
  min-height:100vh;
  font-family:var(--font-sans);
  font-size:17px;
  line-height:1.75;
  color:var(--cream);
  background:
    radial-gradient(920px 520px at 84% -12%,rgba(201,162,39,.16),transparent 66%),
    radial-gradient(760px 480px at 4% 10%,rgba(63,197,214,.09),transparent 62%),
    linear-gradient(180deg,#0B0F1A 0%,#141F3D 46%,#0B0F1A 100%);
  background-attachment:fixed;
}
body::before{
  content:"";position:fixed;inset:0;z-index:0;pointer-events:none;
  background-image:
    repeating-linear-gradient(0deg,rgba(247,244,236,.026) 0 1px,transparent 1px 84px),
    repeating-linear-gradient(90deg,rgba(247,244,236,.02) 0 1px,transparent 1px 84px);
}
#main-content{position:relative;z-index:1}

h1,h2,h3,h4{line-height:1.16;font-weight:700;letter-spacing:-.01em}
h1{font-size:56px}
h2{font-size:40px}
h3{font-size:28px}
h4{font-size:22px}
p{max-width:78ch}
small{font-size:14px;color:var(--mist)}
.mono,[data-num],code,kbd{font-family:var(--font-mono);font-variant-numeric:tabular-nums;letter-spacing:.02em}
.mono--gold{color:var(--gold-light);border-bottom:1px solid var(--gold);padding-bottom:2px}
.title-serif{font-family:var(--font-serif)}
.visually-hidden{
  position:absolute !important;width:1px;height:1px;margin:-1px;padding:0;
  overflow:hidden;clip:rect(0 0 0 0);clip-path:inset(50%);white-space:nowrap;border:0;
}
:focus-visible{outline:2px solid var(--gold-light);outline-offset:3px;border-radius:8px}

/* ---------- 4. 跳至主要内容 ---------- */
.skip-link{
  position:absolute;top:10px;left:10px;z-index:200;
  padding:11px 20px;border-radius:var(--radius-pill);
  background:linear-gradient(120deg,var(--gold-light),var(--gold));
  color:var(--ink);font-weight:700;font-size:15px;
  transform:translateY(-180%);transition:transform .22s var(--ease);
}
.skip-link:focus{transform:none}

/* ---------- 5. 头部：品牌金轨 + 悬浮胶囊 ---------- */
.site-header{position:relative;z-index:90}

.brand-rail{display:none}

@media (min-width:900px){
  body{padding-left:var(--rail)}
  .skip-link{left:calc(var(--rail) + 12px)}
  .brand-rail{
    display:flex;position:fixed;top:0;left:0;bottom:0;width:var(--rail);z-index:60;
    flex-direction:column;align-items:center;justify-content:space-between;
    padding:26px 0;
    background:linear-gradient(180deg,#0B0F1A,#141F3D 52%,#0B0F1A);
    border-right:1px solid var(--line-gold);
  }
  .brand-rail__mark{
    writing-mode:vertical-rl;font-family:var(--font-mono);font-size:13px;
    letter-spacing:.36em;text-transform:uppercase;color:var(--gold-light);
  }
  .brand-rail__track{
    position:relative;flex:1;width:2px;margin:26px 0;overflow:hidden;
    background:rgba(154,163,189,.22);border-radius:2px;
  }
  .brand-rail__progress{
    position:absolute;top:0;left:0;width:100%;height:100%;
    transform-origin:top center;transform:scaleY(var(--rail-progress,0));
    background:linear-gradient(180deg,var(--gold-light),var(--gold) 55%,var(--amber));
    transition:transform .18s linear;
  }
  .brand-rail__label{
    writing-mode:vertical-rl;font-size:12px;letter-spacing:.24em;color:var(--mist);
  }
}

@media (max-width:899px){
  body{padding-bottom:56px}
  .brand-rail{
    display:flex;position:fixed;left:0;right:0;bottom:0;z-index:60;height:46px;
    align-items:center;gap:12px;padding:0 16px;
    background:linear-gradient(90deg,#0B0F1A,#141F3D 58%,#0B0F1A);
    border-top:1px solid var(--line-gold);
  }
  .brand-rail__mark{font-family:var(--font-mono);font-size:12px;letter-spacing:.28em;color:var(--gold-light)}
  .brand-rail__track{
    position:relative;flex:1;height:2px;overflow:hidden;border-radius:2px;
    background:rgba(154,163,189,.22);
  }
  .brand-rail__progress{
    position:absolute;top:0;left:0;width:100%;height:100%;
    transform-origin:left center;transform:scaleX(var(--rail-progress,0));
    background:linear-gradient(90deg,var(--gold-light),var(--gold) 55%,var(--amber));
  }
  .brand-rail__label{font-size:11px;letter-spacing:.12em;color:var(--mist);white-space:nowrap}
}

.capsule{
  position:fixed;top:18px;right:24px;z-index:100;
  display:flex;align-items:center;gap:14px;
  padding:8px 12px 8px 20px;max-width:calc(100vw - 40px);
  border-radius:var(--radius-pill);
  background:linear-gradient(120deg,rgba(34,48,92,.92),rgba(11,15,26,.9));
  border:1px solid var(--line-gold);
  backdrop-filter:blur(16px);
  box-shadow:var(--shadow);
  transition:padding .26s var(--ease),gap .26s var(--ease);
}
.capsule__brand{display:flex;flex-direction:column;line-height:1.15}
.capsule__brand-cn{font-family:var(--font-serif);font-size:17px;font-weight:700}
.capsule__brand-en{font-family:var(--font-mono);font-size:10.5px;letter-spacing:.28em;color:var(--gold-light)}
.capsule__version{
  font-family:var(--font-mono);font-size:12px;letter-spacing:.06em;color:var(--gold-light);
  padding:3px 10px;border-radius:var(--radius-pill);border:1px solid var(--line-gold);
}
.capsule__icon,.capsule__toggle{
  width:38px;height:38px;flex:none;display:grid;place-items:center;
  border-radius:50%;border:1px solid var(--line-gold);color:var(--gold-light);
  transition:background-color .2s var(--ease),border-color .2s var(--ease),transform .2s var(--ease);
}
.capsule__icon:hover,.capsule__toggle:hover{background:rgba(201,162,39,.16);border-color:var(--gold)}
.capsule__icon:active,.capsule__toggle:active{transform:translateY(1px);border-color:var(--gold-dark)}
.icon{width:18px;height:18px}
.capsule__toggle{display:none}
.capsule__bars{position:relative;width:18px;height:2px;border-radius:2px;background:var(--gold-light);transition:background-color .2s var(--ease)}
.capsule__bars::before,.capsule__bars::after{
  content:"";position:absolute;left:0;width:18px;height:2px;border-radius:2px;background:var(--gold-light);
  transition:transform .26s var(--ease);
}
.capsule__bars::before{top:-6px}
.capsule__bars::after{top:6px}
.capsule__toggle[aria-expanded="true"] .capsule__bars{background:transparent}
.capsule__toggle[aria-expanded="true"] .capsule__bars::before{transform:translateY(6px) rotate(45deg)}
.capsule__toggle[aria-expanded="true"] .capsule__bars::after{transform:translateY(-6px) rotate(-45deg)}

/* 导航：桌面为胶囊内横排 */
.capsule__nav{display:flex;align-items:center}
.nav-list{display:flex;align-items:center;gap:2px}
.nav-item{position:relative}
.nav-item__link{
  display:flex;flex-direction:column;padding:8px 13px;border-radius:var(--radius-pill);
  font-size:14px;line-height:1.35;color:rgba(247,244,236,.84);
  transition:background-color .22s var(--ease),color .22s var(--ease);
}
.nav-item__link:hover{background:rgba(247,244,236,.08);color:var(--cream)}
.nav-item__link[aria-current="page"]{
  background:linear-gradient(135deg,var(--gold-light),var(--gold));
  color:var(--ink);font-weight:600;
}
.nav-item__desc{display:none}

/* 筛选浮层 */
.nav-filter{
  display:none;position:absolute;top:calc(100% + 12px);right:0;
  width:min(370px,calc(100vw - 24px));padding:18px;
  border-radius:var(--radius-lg);border:1px solid var(--line-gold);
  background:linear-gradient(160deg,rgba(34,48,92,.98),rgba(11,15,26,.98));
  box-shadow:var(--shadow);
}
.capsule__nav[data-filter="true"] .nav-filter{display:block}
.nav-filter__label{display:block;font-family:var(--font-mono);font-size:12px;letter-spacing:.12em;color:var(--gold-light);margin-bottom:10px}
.nav-filter__input{
  width:100%;padding:11px 14px;border-radius:var(--radius-md);
  background:rgba(11,15,26,.7);border:1px solid rgba(154,163,189,.3);color:var(--cream);
  font-size:15px;
}
.nav-filter__input::placeholder{color:rgba(154,163,189,.75)}
.nav-filter__empty{display:none;margin-top:12px;font-size:14px;color:var(--amber)}
.capsule__nav[data-empty="true"] .nav-filter__empty{display:block}

/* 收缩态：越过首屏后仅保留字标与菜单 */
@media (min-width:901px){
  .site-header[data-shrunk="true"] .capsule{padding:6px 10px 6px 16px;gap:8px}
  .site-header[data-shrunk="true"] .capsule__version,
  .site-header[data-shrunk="true"] .capsule__search,
  .site-header[data-shrunk="true"] .capsule__brand-en{display:none}
}

/* 移动端：胶囊占满宽度，导航化为浮岛两列面板 */
@media (max-width:900px){
  .capsule{top:12px;left:12px;right:12px;max-width:none;justify-content:space-between;gap:8px;padding:8px 10px 8px 16px}
  .capsule__toggle{display:grid}
  .capsule__nav{display:none}
  .capsule__nav[data-open="true"]{
    display:block;position:absolute;top:calc(100% + 10px);left:0;right:0;
    padding:16px;max-height:calc(100vh - 110px);overflow-y:auto;
    border-radius:var(--radius-lg);border:1px solid var(--line-gold);
    background:linear-gradient(160deg,#141F3D,#0B0F1A);
    box-shadow:var(--shadow);
  }
  .capsule__nav[data-open="true"] .nav-list{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:8px}
  .nav-item__link{
    padding:12px 14px;border-radius:var(--radius-md);
    border:1px solid rgba(154,163,189,.16);background:rgba(247,244,236,.04);
    font-size:15px;
  }
  .nav-item__link[aria-current="page"]{border-color:transparent}
  .nav-item__desc{display:block;margin-top:5px;font-size:12.5px;line-height:1.5;color:var(--mist)}
  .nav-item__link[aria-current="page"] .nav-item__desc{color:rgba(11,15,26,.72)}
  .nav-filter{position:static;width:auto;padding:16px 4px 2px;margin-top:14px;background:none;border:0;border-top:1px dashed var(--line-gold);border-radius:0;box-shadow:none}
}

@media (max-width:480px){
  .capsule__nav[data-open="true"] .nav-list{grid-template-columns:1fr}
  .capsule__version{display:none}
}

/* ---------- 6. 返回顶部 ---------- */
.to-top{
  position:fixed;right:24px;bottom:24px;z-index:95;
  display:inline-flex;align-items:center;gap:9px;
  padding:11px 20px;border-radius:var(--radius-pill);
  font-size:14px;color:var(--gold-light);
  background:linear-gradient(135deg,rgba(34,48,92,.96),rgba(11,15,26,.96));
  border:1px solid var(--line-gold);
  opacity:0;transform:translateY(18px);pointer-events:none;
  transition:opacity .32s var(--ease),transform .32s var(--ease),border-color .2s var(--ease);
}
.to-top[data-visible="true"]{opacity:1;transform:none;pointer-events:auto}
.to-top:hover{border-color:var(--gold)}
.to-top:active{transform:translateY(1px)}
.to-top__arrow{width:9px;height:9px;border-left:2px solid currentColor;border-top:2px solid currentColor;transform:rotate(45deg);margin-top:2px}
@media (max-width:899px){ .to-top{right:16px;bottom:62px} }

/* ---------- 7. 容器 · 栅格 · 段落节奏 ---------- */
.shell{width:100%;max-width:var(--shell-max);margin:0 auto;padding-inline:var(--gutter)}

.grid{display:grid;grid-template-columns:repeat(12,minmax(0,1fr));gap:var(--gap)}
.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-12{grid-column:span 12}

.split{display:grid;grid-template-columns:minmax(0,7fr) minmax(0,4fr);gap:56px}
.split--reverse{grid-template-columns:minmax(0,4fr) minmax(0,7fr)}

.section{position:relative;padding:88px 0}
.section--tight{padding:56px 0}
.section--lead{padding-top:var(--head-space)}
.section__head{display:grid;grid-template-columns:minmax(0,7fr) minmax(0,4fr);gap:36px;align-items:end;margin-bottom:46px}
.section__kicker{
  display:flex;align-items:center;gap:12px;
  font-family:var(--font-mono);font-size:13px;letter-spacing:.22em;text-transform:uppercase;color:var(--gold-light);
}
.section__kicker::before{content:"";width:40px;height:1px;background:linear-gradient(90deg,var(--gold),transparent)}
.section__title{font-family:var(--font-serif);font-size:40px;margin-top:14px}
.section__lede{font-size:16px;color:var(--mist)}

.prose{max-width:70ch}
.prose p+p{margin-top:18px}
.prose h3,.prose h4{margin-top:34px;margin-bottom:12px}
.prose ul,.prose ol{margin-top:16px;display:grid;gap:10px}
.prose li{position:relative;padding-left:20px}
.prose li::before{content:"";position:absolute;left:0;top:.78em;width:9px;height:1px;background:var(--gold)}
.prose a{color:var(--cyan);border-bottom:1px solid rgba(63,197,214,.45)}

.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:10px;font-size:14px;color:var(--mist)}
.breadcrumb a{color:var(--cream);border-bottom:1px solid var(--line-gold)}
.breadcrumb__sep{color:rgba(154,163,189,.6)}
.breadcrumb__current{color:var(--gold-light)}
.breadcrumb__version{
  font-family:var(--font-mono);font-size:12px;padding:2px 9px;border-radius:var(--radius-pill);
  border:1px solid var(--line-gold);color:var(--gold-light);
}

/* ---------- 8. 通用组件 ---------- */
.btn{
  display:inline-flex;align-items:center;gap:10px;
  padding:13px 26px;border-radius:var(--radius-pill);
  font-size:16px;font-weight:600;border:1px solid transparent;
  transition:transform .2s var(--ease),box-shadow .26s var(--ease),border-color .2s var(--ease),background-color .2s var(--ease);
}
.btn--gold{
  background:linear-gradient(120deg,var(--gold-light),var(--gold) 46%,var(--gold-dark));
  background-size:200% 100%;color:var(--ink);
  box-shadow:0 12px 30px rgba(201,162,39,.24);
  animation:goldshift 18s linear infinite;
}
.btn--ghost{border-color:rgba(201,162,39,.46);color:var(--gold-light);background:transparent}
.btn--quiet{border-color:rgba(154,163,189,.32);color:var(--mist)}
.btn--sm{padding:9px 18px;font-size:14px}
.btn:hover{transform:translateY(-2px)}
.btn:active{transform:translateY(1px);border-color:var(--gold-dark)}
@keyframes goldshift{0%{background-position:0 0}100%{background-position:200% 0}}

.card{
  position:relative;padding:26px;border-radius:var(--radius-lg);
  background:linear-gradient(160deg,rgba(34,48,92,.62),rgba(11,15,26,.74));
  border:1px solid var(--line);
  transition:transform .28s var(--ease),border-color .28s var(--ease),box-shadow .28s var(--ease);
}
.card:hover{transform:translateY(-2px);border-color:var(--gold);box-shadow:var(--shadow)}
.card--flat{background:rgba(11,15,26,.5)}
.card--cream{background:var(--cream);color:var(--indigo);border-color:rgba(138,106,18,.25)}
.card__index{font-family:var(--font-mono);font-size:13px;letter-spacing:.08em;color:var(--gold-light)}
.card--cream .card__index{color:var(--gold-dark)}
.card__title{font-size:22px;margin-top:12px}
.card__text{margin-top:10px;font-size:15px;color:var(--mist)}
.card--cream .card__text{color:#4B5470}
.card__meta{
  margin-top:18px;display:flex;flex-wrap:wrap;gap:10px;align-items:center;
  font-family:var(--font-mono);font-size:12px;color:var(--mist);
}
.card-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:var(--gap)}

.glass{
  padding:22px;border-radius:var(--radius-lg);
  background:linear-gradient(160deg,rgba(34,48,92,.55),rgba(11,15,26,.62));
  border:1px solid var(--line-gold);
  backdrop-filter:blur(12px);
}

.tag{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 12px;border-radius:var(--radius-pill);
  font-family:var(--font-mono);font-size:12.5px;letter-spacing:.04em;
  border:1px solid var(--line);color:var(--mist);
}
.tag--gold{border-color:rgba(201,162,39,.5);color:var(--gold-light)}
.tag--amber{border-color:rgba(255,138,61,.55);color:var(--amber)}
.tag--cyan{border-color:rgba(63,197,214,.5);color:var(--cyan)}
.chip-row{display:flex;flex-wrap:wrap;gap:10px}

.stat{display:grid;gap:6px}
.stat__value{
  width:fit-content;font-family:var(--font-mono);font-size:34px;line-height:1.2;
  color:var(--gold-light);border-bottom:2px solid var(--gold);padding-bottom:4px;
}
.stat__label{font-size:14px;color:var(--mist)}

.index-list{border-top:1px solid var(--line)}
.index-list__item{
  display:grid;grid-template-columns:64px minmax(0,1fr) auto;gap:18px;align-items:center;
  padding:18px 6px;border-bottom:1px solid var(--line);
  transition:background-color .24s var(--ease),padding-left .24s var(--ease);
}
.index-list__item:hover{background:rgba(201,162,39,.07);padding-left:14px}
.index-list__num{font-family:var(--font-mono);font-size:13px;color:var(--gold-light)}
.index-list__label{font-weight:600}
.index-list__meta{font-family:var(--font-mono);font-size:12px;color:var(--mist);justify-self:end}

.timeline{display:grid;gap:28px;padding-left:26px;border-left:1px solid var(--line-gold)}
.timeline__item{position:relative}
.timeline__item::before{
  content:"";position:absolute;left:-31px;top:.55em;width:9px;height:9px;border-radius:50%;
  background:var(--gold);box-shadow:0 0 0 4px rgba(201,162,39,.16);
}
.timeline__year{font-family:var(--font-mono);font-size:14px;color:var(--gold-light)}

.media{position:relative}
.media__frame{
  position:relative;overflow:hidden;aspect-ratio:16/9;
  border-radius:var(--radius-lg);border:1px solid var(--line-gold);
  background:linear-gradient(135deg,rgba(34,48,92,.92),rgba(11,15,26,.96));
}
.media__frame::after{
  content:"";position:absolute;inset:0;z-index:2;pointer-events:none;
  background:
    linear-gradient(115deg,transparent 42%,rgba(242,213,126,.16) 50%,transparent 60%),
    repeating-linear-gradient(135deg,rgba(247,244,236,.045) 0 2px,transparent 2px 12px);
}
.media__frame img,.media__frame svg{position:relative;z-index:1;width:100%;height:100%;object-fit:cover}
.media--4x5 .media__frame{aspect-ratio:4/5}
.media--1x1 .media__frame{aspect-ratio:1/1}
.media--21x9 .media__frame{aspect-ratio:21/9}
.media__caption{margin-top:10px;font-size:14px;color:var(--mist)}

.rule-gold{height:1px;border:0;background:linear-gradient(90deg,var(--gold),rgba(201,162,39,0))}
.slash{height:1px;background:linear-gradient(90deg,transparent,rgba(201,162,39,.55),transparent);transform:rotate(-12deg);transform-origin:left center}

.band-cream{background:var(--cream);color:var(--indigo)}
.band-cream .section__title,.band-cream h2,.band-cream h3{color:var(--indigo)}
.band-cream .section__lede,.band-cream p{color:#4B5470}
.band-cream .section__kicker{color:var(--gold-dark)}

/* 显现动效（需 JS 激活，保证无脚本时内容可见） */
.has-js [data-reveal]{opacity:0;transform:translateY(16px);transition:opacity .32s var(--ease),transform .32s var(--ease)}
.has-js [data-reveal].is-visible{opacity:1;transform:none}

/* ---------- 9. 页脚 ---------- */
.site-footer{
  position:relative;z-index:1;margin-top:96px;padding:76px 0 26px;
  background:linear-gradient(180deg,rgba(11,15,26,.7),#0B0F1A 42%,#141F3D);
  border-top:1px solid var(--line-gold);
}
.footer__grid{display:grid;grid-template-columns:minmax(0,1.5fr) minmax(0,1fr) minmax(0,1fr) minmax(0,1.3fr);gap:44px 32px}
.footer__wordmark{font-family:var(--font-serif);font-size:26px;font-weight:700;color:var(--cream)}
.footer__wordmark-en{display:block;margin-top:6px;font-family:var(--font-mono);font-size:13px;letter-spacing:.3em;color:var(--gold-light)}
.footer__desc{margin-top:16px;font-size:15px;color:var(--mist);max-width:38ch}
.footer__badge{display:flex;align-items:center;gap:10px;margin-top:18px;font-size:13px;color:var(--cream)}
.footer__badge .mono{color:var(--gold-light);border-bottom:1px solid var(--gold);padding-bottom:2px}
.footer__cta{margin-top:20px}
.footer__title{font-family:var(--font-mono);font-size:13px;letter-spacing:.16em;color:var(--gold-light);margin-bottom:16px;font-weight:600}
.footer__list{display:grid;gap:11px;font-size:15px;color:var(--mist)}
.footer__list li{position:relative;padding-left:14px}
.footer__list li::before{content:"";position:absolute;left:0;top:.78em;width:6px;height:1px;background:rgba(201,162,39,.6)}
.footer__list a{color:var(--mist);border-bottom:1px solid transparent;padding-bottom:1px;transition:color .2s var(--ease),border-color .2s var(--ease)}
.footer__list a:hover{color:var(--cream);border-color:var(--line-gold)}
.footer__list--contact li{display:grid;gap:4px;font-size:14px;color:var(--mist)}
.copy-btn{
  justify-self:start;font-family:var(--font-mono);font-size:14px;color:var(--gold-light);
  border-bottom:1px dashed rgba(201,162,39,.5);padding:0;text-align:left;
  transition:color .2s var(--ease),border-color .2s var(--ease);
}
.copy-btn:hover{color:var(--cream);border-color:var(--gold)}
.copy-btn[data-copied="true"]{color:var(--cyan);border-color:var(--cyan)}
.footer__note{margin-top:16px;font-size:13px;color:var(--mist)}
.footer__legal{
  display:flex;flex-wrap:wrap;align-items:center;gap:10px 28px;
  margin-top:56px;padding-top:22px;border-top:1px solid var(--line);
  font-size:13px;color:var(--mist);
}
.footer__copy{color:var(--cream)}
.footer__icp,.footer__region{color:var(--mist)}

/* ---------- 10. 响应式与减动效 ---------- */
@media (max-width:1200px){
  :root{--gutter:44px;--head-space:124px}
  .section__head{grid-template-columns:minmax(0,6fr) minmax(0,5fr)}
}
@media (max-width:1100px){
  .footer__grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .split,.split--reverse{grid-template-columns:minmax(0,1fr);gap:36px}
  .col-3,.col-4,.col-5{grid-column:span 6}
  .col-7,.col-8{grid-column:span 12}
}
@media (max-width:900px){
  :root{--gutter:24px;--head-space:112px}
  body{font-size:15px}
  h1{font-size:38px}
  h2{font-size:29px}
  h3{font-size:23px}
  h4{font-size:19px}
  .section{padding:64px 0}
  .section--tight{padding:44px 0}
  .section__head{grid-template-columns:minmax(0,1fr);gap:18px;margin-bottom:32px}
  .section__title{font-size:29px}
  .index-list__item{grid-template-columns:46px minmax(0,1fr);gap:12px}
  .index-list__meta{grid-column:2;justify-self:start}
}
@media (max-width:640px){
  :root{--gutter:18px}
  .grid{grid-template-columns:repeat(6,minmax(0,1fr));gap:18px}
  .col-3,.col-4,.col-5,.col-6,.col-7,.col-8,.col-12{grid-column:span 6}
  .footer__grid{grid-template-columns:minmax(0,1fr)}
  .footer__legal{gap:8px 18px;margin-top:40px}
  .stat__value{font-size:28px}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation-duration:.001ms !important;animation-iteration-count:1 !important;transition-duration:.001ms !important}
  .has-js [data-reveal]{opacity:1 !important;transform:none !important}
  .btn--gold{animation:none}
}