/* 皇冠体彩开奖 · 共享站点样式 /assets/site.css */

:root{
  --ink:#0E1013;
  --ink-2:#171A1F;
  --ink-3:#101318;
  --gold:#D9A93A;
  --gold-bright:#F2C75C;
  --wine:#7A1F33;
  --teal:#123B3A;
  --indigo:#2C2A5E;
  --steel:#8FA6BF;
  --paper:#F4F1EA;
  --gray:#6E747E;
  --green:#3E7A5E;

  --line:rgba(143,166,191,.22);
  --line-strong:rgba(143,166,191,.42);
  --glass:rgba(23,26,31,.72);

  --wrap:1280px;
  --gutter:24px;

  --font-display:"PingFang SC","Source Han Sans SC","Noto Sans SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --font-body:"PingFang SC","Source Han Sans SC","Noto Sans SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --font-mono:"JetBrains Mono","Roboto Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;

  --ease:cubic-bezier(.22,.61,.36,1);
  --dur:280ms;
}

/* ---------- reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:150px}
body,h1,h2,h3,h4,p,ul,ol,li,figure,blockquote,dl,dd,fieldset{margin:0}
ul,ol{padding:0;list-style:none}
img,svg{display:block;max-width:100%}
button{font:inherit;color:inherit}
table{border-collapse:collapse}
a{color:var(--gold)}

body{
  background:var(--ink);
  color:var(--paper);
  font-family:var(--font-body);
  font-size:16.5px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
  overflow-x:hidden;
}

:focus-visible{outline:2px solid var(--gold-bright);outline-offset:3px;border-radius:4px}

/* ---------- 通用工具 ---------- */
.wrap{width:100%;max-width:var(--wrap);margin-inline:auto;padding-inline:var(--gutter)}
.num{font-family:var(--font-mono);font-variant-numeric:tabular-nums;letter-spacing:-.01em}
.rule{height:1px;border:0;background:var(--line);margin:0}
.skip-link{
  position:absolute;left:16px;top:-80px;z-index:400;
  background:var(--gold);color:#14161a;font-weight:800;font-size:14px;
  padding:10px 20px;border-radius:0 0 14px 14px;text-decoration:none;
  transition:top .2s var(--ease);
}
.skip-link:focus{top:0}

/* ---------- 刊头 ---------- */
.masthead{
  position:sticky;top:0;z-index:100;
  background:rgba(14,16,19,.88);
  -webkit-backdrop-filter:blur(16px) saturate(140%);
  backdrop-filter:blur(16px) saturate(140%);
  border-bottom:1px solid var(--line);
  transition:background .3s var(--ease),box-shadow .3s var(--ease);
}
.masthead[data-compact]{background:rgba(14,16,19,.97);box-shadow:0 14px 34px rgba(0,0,0,.5)}

.masthead__progress{position:absolute;left:0;right:0;bottom:-1px;height:2px;background:rgba(143,166,191,.14);pointer-events:none}
.masthead__progress-fill{
  display:block;height:100%;width:100%;
  transform:scaleX(0);transform-origin:0 50%;
  background:linear-gradient(90deg,var(--wine),var(--gold),var(--gold-bright));
  transition:transform .08s linear;
}

.masthead__bar{background:rgba(23,26,31,.72);border-bottom:1px solid rgba(143,166,191,.14)}
.masthead__bar-inner{
  display:grid;grid-template-columns:1fr auto 1fr;align-items:center;gap:16px;
  min-height:34px;font-size:11.5px;letter-spacing:.08em;color:var(--gray);
}
.masthead__flag{
  display:inline-flex;align-items:center;gap:8px;justify-self:start;
  font-family:var(--font-mono);letter-spacing:.16em;color:var(--gold);
}
.masthead__pulse{
  width:6px;height:6px;border-radius:50%;background:var(--gold-bright);
  box-shadow:0 0 0 0 rgba(242,199,92,.55);
  animation:crownPulse 2.6s var(--ease) infinite;
}
@keyframes crownPulse{
  0%{box-shadow:0 0 0 0 rgba(242,199,92,.5)}
  70%{box-shadow:0 0 0 9px rgba(242,199,92,0)}
  100%{box-shadow:0 0 0 0 rgba(242,199,92,0)}
}
.masthead__sync{justify-self:center;text-align:center;color:var(--steel);letter-spacing:.06em}
.masthead__sync .num{color:var(--gold-bright);font-weight:700}
.masthead__tools{justify-self:end;display:flex;align-items:center;gap:18px}
.tool-link{
  color:var(--steel);text-decoration:none;letter-spacing:.1em;
  transition:color .2s var(--ease);
}
.tool-link:hover{color:var(--paper)}
.tool-link--accent{color:var(--gold);border-bottom:1px solid rgba(217,169,58,.5);padding-bottom:1px}
.tool-link--accent:hover{color:var(--gold-bright)}

.masthead__crest{display:flex;align-items:center;gap:26px;padding-block:22px 16px}
.crest-rule{flex:1 1 auto;height:1px;background:linear-gradient(90deg,transparent,rgba(143,166,191,.5),transparent);transition:opacity .3s var(--ease)}

.brand{display:inline-flex;align-items:center;gap:14px;text-decoration:none;color:inherit}
.brand__mark{
  width:38px;height:38px;flex:0 0 auto;display:grid;place-items:center;
  font-family:var(--font-display);font-weight:900;font-size:17px;color:#14161a;
  background:linear-gradient(150deg,var(--gold-bright),var(--gold));
  clip-path:polygon(0 0,100% 0,100% 70%,70% 100%,0 100%);
  transition:width .3s var(--ease),height .3s var(--ease),font-size .3s var(--ease);
}
.brand__text{display:flex;flex-direction:column;gap:6px;line-height:1}
.brand__name{
  font-family:var(--font-display);font-weight:900;
  font-size:clamp(20px,2.4vw,30px);letter-spacing:.14em;color:var(--paper);
  transition:font-size .3s var(--ease),letter-spacing .3s var(--ease);
}
.brand__meta{
  font-size:10.5px;letter-spacing:.3em;color:var(--steel);
  font-family:var(--font-mono);
}

.masthead__nav-row{
  display:grid;grid-template-columns:1fr auto 1fr;align-items:center;
  padding-bottom:4px;
}
.nav{justify-self:center}
.nav__list{display:flex;align-items:center;gap:30px}
.nav__link{
  position:relative;display:inline-block;padding:12px 2px 14px;
  font-size:14px;font-weight:700;letter-spacing:.08em;
  color:rgba(244,241,234,.72);text-decoration:none;
  transition:color .2s var(--ease);
}
.nav__link:hover,.nav__link:focus-visible{color:var(--paper)}
.nav__link::after{
  content:"";position:absolute;left:50%;bottom:6px;width:24px;height:2px;
  background:var(--gold);transform:translateX(-50%) scaleX(0);
  transition:transform var(--dur) var(--ease);
}
.nav__link:hover::after{transform:translateX(-50%) scaleX(.45)}
.nav__link[aria-current="page"]{color:var(--gold-bright)}
.nav__link[aria-current="page"]::after{transform:translateX(-50%) scaleX(1)}

.nav-download{
  justify-self:end;
  font-size:12.5px;letter-spacing:.14em;color:var(--paper);text-decoration:none;
  border:1px solid var(--line-strong);border-radius:999px;padding:7px 18px;
  transition:border-color .2s var(--ease),color .2s var(--ease),background .2s var(--ease);
}
.nav-download:hover{border-color:var(--gold);color:var(--gold-bright);background:rgba(217,169,58,.1)}

.nav-toggle{
  display:none;align-items:center;gap:10px;
  background:transparent;border:1px solid var(--line-strong);border-radius:999px;
  padding:8px 15px;cursor:pointer;font-size:12.5px;letter-spacing:.16em;color:var(--paper);
  transition:border-color .2s var(--ease),color .2s var(--ease);
}
.nav-toggle:hover{border-color:var(--gold);color:var(--gold-bright)}
.nav-toggle__bars{display:inline-flex;flex-direction:column;justify-content:center;gap:4px;width:16px}
.nav-toggle__bars i{display:block;height:1.5px;background:currentColor;border-radius:2px;transition:transform .25s var(--ease),opacity .2s var(--ease)}
.masthead[data-open] .nav-toggle{border-color:var(--gold);color:var(--gold-bright)}
.masthead[data-open] .nav-toggle__bars i:nth-child(1){transform:translateY(5.5px) rotate(45deg)}
.masthead[data-open] .nav-toggle__bars i:nth-child(2){opacity:0}
.masthead[data-open] .nav-toggle__bars i:nth-child(3){transform:translateY(-5.5px) rotate(-45deg)}

/* 压缩态通用部分 */
.masthead[data-compact] .masthead__bar{display:none}
.masthead[data-compact] .masthead__crest{padding-block:10px}
.masthead[data-compact] .brand__meta{display:none}
.masthead[data-compact] .crest-rule{opacity:0}
.masthead[data-compact] .brand__mark{width:30px;height:30px;font-size:14px}
.masthead[data-compact] .brand__name{font-size:18px;letter-spacing:.1em}

@media (min-width:901px){
  .masthead[data-compact]{display:flex;align-items:center;gap:22px;padding-inline:var(--gutter)}
  .masthead[data-compact] .masthead__crest{flex:0 0 auto;width:auto;max-width:none;margin:0;padding:10px 0}
  .masthead[data-compact] .masthead__nav-row{flex:1 1 auto;width:auto;max-width:none;margin:0;padding:0}
  .masthead[data-compact] .nav__list{gap:22px}
  .masthead[data-compact] .nav__link{padding:10px 2px;font-size:13px}
  .masthead[data-compact] .nav-download{padding:5px 13px;font-size:11.5px}
}

/* ---------- 页脚 ---------- */
.site-footer{
  position:relative;background:var(--ink-2);
  border-top:1px solid rgba(143,166,191,.2);
  color:rgba(244,241,234,.82);
}
.site-footer::before{
  content:"";position:absolute;top:0;left:0;right:0;height:2px;
  background:linear-gradient(90deg,var(--wine),var(--gold) 35%,var(--teal) 70%,transparent);
}
.footer__mast{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:24px;
  padding-block:52px 32px;border-bottom:1px solid rgba(143,166,191,.16);
}
.footer__identity{display:flex;flex-direction:column;gap:16px;max-width:640px}
.brand--footer .brand__meta{display:inline}
.footer__line{font-size:14px;line-height:1.75;color:var(--steel);max-width:32em}
.footer__cta{flex:0 0 auto}

.footer__grid{
  display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:32px;
  padding-block:40px;border-bottom:1px solid rgba(143,166,191,.16);
}
.footer__head{
  font-family:var(--font-mono);font-size:11.5px;font-weight:700;
  letter-spacing:.26em;text-transform:uppercase;color:var(--gold);margin-bottom:16px;
}
.footer__list{display:flex;flex-direction:column;gap:10px}
.footer__list a{
  color:rgba(244,241,234,.72);text-decoration:none;font-size:14.5px;
  transition:color .2s var(--ease),padding-left .2s var(--ease);
}
.footer__list a:hover{color:var(--gold-bright);padding-left:4px}

.footer__contact{
  display:flex;flex-wrap:wrap;align-items:flex-start;gap:16px 44px;
  padding-block:34px;border-bottom:1px solid rgba(143,166,191,.16);
}
.contact-item{display:flex;flex-direction:column;gap:6px;min-width:190px}
.contact-item--wide{flex:1 1 100%}
.contact-item__label{
  font-family:var(--font-mono);font-size:10.5px;letter-spacing:.26em;
  text-transform:uppercase;color:var(--gray);
}
.contact-item__value{font-size:15px;color:var(--paper);letter-spacing:.02em;word-break:break-all}
.copy-btn{
  align-self:flex-start;margin-top:2px;
  background:transparent;border:1px solid rgba(217,169,58,.5);border-radius:999px;
  color:var(--gold);font-size:11.5px;letter-spacing:.12em;padding:4px 13px;cursor:pointer;
  transition:background .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease);
}
.copy-btn:hover{background:rgba(217,169,58,.16)}
.copy-btn[data-copied]{background:var(--green);border-color:var(--green);color:#fff}
.footer__note{flex:1 1 100%;font-size:12.5px;line-height:1.75;color:var(--gray);max-width:56em}

.footer__legal{
  display:flex;flex-wrap:wrap;align-items:center;gap:12px 28px;
  padding-block:24px 42px;font-family:var(--font-mono);
  font-size:12px;letter-spacing:.05em;color:var(--gray);
}
.footer__copy{margin-right:auto}
.footer__icp{color:var(--steel)}
.footer__legal-links{display:flex;flex-wrap:wrap;gap:20px}
.footer__legal-links a{color:var(--steel);text-decoration:none;transition:color .2s var(--ease)}
.footer__legal-links a:hover{color:var(--gold-bright)}

/* ---------- 区块与网格 ---------- */
.section{position:relative;padding-block:72px}
.section--tight{padding-block:44px}
.section--paper{background:var(--paper);color:#1b1f26}
.section--wine{background:linear-gradient(155deg,#7A1F33,#4b1320 82%)}
.section--teal{background:linear-gradient(155deg,#123B3A,#0a2423 82%)}
.section--indigo{background:linear-gradient(155deg,#2C2A5E,#191840 82%)}
.section--paper .display-title,.section--paper .section-title{color:var(--ink)}
.section--paper .lede,.section--paper .prose,.section--paper .meta-text{color:#4a505a}
.section--paper .kicker{color:#8a6a12}

.page-head{
  padding-block:56px 44px;
  background:
    radial-gradient(circle at 86% -10%,rgba(44,42,94,.6),transparent 62%),
    radial-gradient(circle at 8% 0%,rgba(18,59,58,.5),transparent 55%),
    linear-gradient(180deg,#101318,#0E1013);
  border-bottom:1px solid var(--line);
}

.section-head{
  display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;
  gap:16px;margin-bottom:32px;
}

.grid{display:grid;grid-template-columns:repeat(12,minmax(0,1fr));gap:24px}
.col-2{grid-column:span 2}
.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-10{grid-column:span 10}
.col-12{grid-column:span 12}

/* ---------- 文本层级 ---------- */
.display-title{
  font-family:var(--font-display);font-weight:900;
  font-size:clamp(44px,7vw,108px);line-height:.95;letter-spacing:-.02em;
  color:var(--paper);
}
.section-title{
  font-family:var(--font-display);font-weight:900;
  font-size:clamp(26px,3.4vw,44px);line-height:1.06;letter-spacing:-.02em;
  color:var(--paper);
}
.card__title{
  font-family:var(--font-display);font-weight:900;
  font-size:20px;line-height:1.35;letter-spacing:-.01em;color:var(--paper);
  margin-top:14px;
}
.kicker{
  display:inline-flex;align-items:center;gap:10px;
  font-family:var(--font-mono);font-size:11.5px;letter-spacing:.32em;
  text-transform:uppercase;color:var(--gold);
}
.kicker::before{content:"";width:26px;height:1px;background:currentColor}
.lede{
  font-size:clamp(16.5px,1.3vw,19px);line-height:1.75;
  color:rgba(244,241,234,.84);max-width:34em;
}
.prose{max-width:34em;font-size:16.5px;line-height:1.8;color:rgba(244,241,234,.82)}
.prose p+p{margin-top:1em}
.prose h3{
  font-family:var(--font-display);font-weight:900;font-size:20px;
  margin-top:1.6em;margin-bottom:.5em;color:var(--paper);
}
.meta-text{font-size:13px;line-height:1.7;color:var(--steel)}
.section--paper .card__title,.card--paper .card__title{color:var(--ink)}

/* ---------- 档案卡 ---------- */
.card{
  position:relative;
  background:var(--glass);
  border:1px solid var(--line);
  border-radius:16px;
  padding:24px;
  -webkit-backdrop-filter:blur(10px);
  backdrop-filter:blur(10px);
}
.card--cut{
  border-radius:0;
  clip-path:polygon(22px 0,100% 0,100% 100%,0 100%,0 22px);
}
.card--paper{
  background:var(--paper);color:#1b1f26;border-color:rgba(14,16,19,.12);
}
.card--index{padding:18px}
.card--feature{padding:32px}
.card__tag{
  display:inline-flex;align-items:center;gap:6px;
  font-family:var(--font-mono);font-size:10.5px;letter-spacing:.2em;text-transform:uppercase;
  color:var(--gold);border:1px solid var(--line-strong);border-radius:999px;padding:4px 11px;
}
.card--paper .card__tag{color:#8a6a12;border-color:rgba(14,16,19,.2)}
.card__body{margin-top:10px;font-size:15px;line-height:1.75;color:rgba(244,241,234,.8)}
.card--paper .card__body{color:#4a505a}
.card__foot{
  display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px;
  margin-top:18px;padding-top:14px;border-top:1px dashed var(--line);
  font-family:var(--font-mono);font-size:11.5px;letter-spacing:.06em;color:var(--gray);
}
.card--paper .card__foot{border-top-color:rgba(14,16,19,.16);color:#5a616b}

/* ---------- 数据条 / 表格 / 标签 ---------- */
.data-band{
  display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));
  gap:1px;background:var(--line);border:1px solid var(--line);
  border-radius:14px;overflow:hidden;
}
.data-item{background:var(--ink-2);padding:20px 18px}
.data-value{
  font-family:var(--font-mono);font-variant-numeric:tabular-nums;
  font-size:clamp(23px,2.4vw,34px);font-weight:700;line-height:1.1;color:var(--gold-bright);
}
.data-unit{font-family:var(--font-body);font-size:12.5px;color:var(--steel);margin-left:6px}
.data-note{margin-top:8px;font-size:12.5px;line-height:1.65;color:var(--gray)}

.table-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:14px;background:rgba(23,26,31,.6)}
.data-table{width:100%;min-width:520px;font-size:14px}
.data-table th{
  font-family:var(--font-mono);font-size:11px;letter-spacing:.16em;text-transform:uppercase;
  color:var(--steel);text-align:left;padding:14px 16px;
  background:rgba(143,166,191,.08);border-bottom:1px solid var(--line);white-space:nowrap;
}
.data-table td{
  padding:13px 16px;border-bottom:1px solid rgba(143,166,191,.12);
  font-variant-numeric:tabular-nums;color:rgba(244,241,234,.86);
}
.data-table tr:last-child td{border-bottom:0}
.data-table tbody tr{transition:background .2s var(--ease)}
.data-table tbody tr:hover{background:rgba(217,169,58,.08)}

.badge{
  display:inline-flex;align-items:center;gap:6px;
  font-family:var(--font-mono);font-size:10.5px;letter-spacing:.12em;
  border:1px solid var(--line-strong);border-radius:999px;padding:3px 11px;color:var(--steel);
}
.badge--gold{background:var(--gold);border-color:var(--gold);color:#14161a;font-weight:700}
.badge--sync{color:#bfe6d2;border-color:rgba(62,122,94,.75);background:rgba(62,122,94,.2)}
.badge--sync::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--green)}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:10px;
  padding:14px 26px;border:1px solid transparent;border-radius:999px;
  font-family:var(--font-body);font-weight:800;font-size:15px;letter-spacing:.04em;
  text-decoration:none;cursor:pointer;
  transition:transform .2s var(--ease),background .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease);
}
.btn:hover{transform:translateY(-2px)}
.btn--gold{background:linear-gradient(135deg,var(--gold-bright),var(--gold));color:#14161a}
.btn--gold:hover{box-shadow:0 12px 26px rgba(217,169,58,.28)}
.btn--ghost{border-color:var(--line-strong);color:var(--paper);background:rgba(244,241,234,.05)}
.btn--ghost:hover{border-color:var(--gold);color:var(--gold-bright);background:rgba(217,169,58,.1)}
.btn--quiet{
  background:transparent;color:var(--gold);padding:6px 0;border-radius:0;
  border-bottom:1px solid rgba(217,169,58,.45);font-size:14px;
}
.btn--quiet:hover{transform:none;color:var(--gold-bright)}

/* ---------- 面包屑 ---------- */
.crumbs{
  display:flex;flex-wrap:wrap;align-items:center;gap:10px;
  font-family:var(--font-mono);font-size:12px;letter-spacing:.06em;color:var(--gray);
}
.crumbs a{color:var(--steel);text-decoration:none;transition:color .2s var(--ease)}
.crumbs a:hover{color:var(--gold-bright)}
.crumbs__sep{opacity:.55}
.crumbs__current{color:var(--paper)}

/* ---------- 折叠面板 ---------- */
.fold{border-top:1px solid var(--line)}
.fold:last-of-type{border-bottom:1px solid var(--line)}
.fold__summary{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:18px 0;cursor:pointer;list-style:none;
  font-family:var(--font-display);font-weight:900;font-size:16px;color:var(--paper);
}
.fold__summary::-webkit-details-marker{display:none}
.fold__summary::after{content:"＋";font-family:var(--font-mono);color:var(--gold);font-weight:400}
.fold[open] .fold__summary::after{content:"－"}
.fold__body{padding-bottom:20px;max-width:34em;font-size:15px;line-height:1.8;color:rgba(244,241,234,.78)}
.section--paper .fold__summary{color:var(--ink)}
.section--paper .fold__body{color:#4a505a}

/* ---------- 模块切换标签 ---------- */
.tabs{
  display:flex;gap:8px;overflow-x:auto;padding-bottom:8px;
  scrollbar-width:thin;scroll-snap-type:x proximity;
}
.tab{
  flex:0 0 auto;scroll-snap-align:center;
  background:transparent;border:1px solid var(--line);border-radius:999px;
  color:var(--steel);font-size:13.5px;letter-spacing:.06em;padding:9px 18px;cursor:pointer;
  transition:background .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease);
}
.tab:hover{border-color:var(--line-strong);color:var(--paper)}
.tab[aria-selected="true"],.tab.is-active{
  background:var(--gold);border-color:var(--gold);color:#14161a;font-weight:800;
}

/* ---------- 筛选与空状态 ---------- */
.filter-bar{display:flex;flex-wrap:wrap;align-items:center;gap:12px}
.filter-input{
  background:var(--ink-2);border:1px solid var(--line);border-radius:999px;
  color:var(--paper);font-family:var(--font-mono);font-size:13.5px;
  padding:10px 18px;min-width:200px;
}
.filter-input::placeholder{color:var(--gray)}
.filter-reset{
  background:transparent;border:1px solid var(--line-strong);border-radius:999px;
  color:var(--steel);font-size:12.5px;letter-spacing:.1em;padding:9px 16px;cursor:pointer;
  transition:color .2s var(--ease),border-color .2s var(--ease);
}
.filter-reset:hover{color:var(--gold-bright);border-color:var(--gold)}

.empty-card{
  padding:36px 28px;text-align:center;color:var(--steel);
  background:var(--ink-2);border:1px dashed var(--line-strong);
  clip-path:polygon(24px 0,100% 0,100% 100%,0 100%,0 24px);
  font-size:14px;line-height:1.8;
}

/* ---------- 章节锚点 ---------- */
.chapter-rail{
  position:sticky;top:132px;
  display:flex;flex-direction:column;gap:2px;
  border-left:1px solid var(--line);padding-left:14px;
}
.chapter-link{
  display:block;padding:7px 0 7px 10px;margin-left:-15px;
  border-left:2px solid transparent;
  font-size:13px;letter-spacing:.04em;color:var(--gray);text-decoration:none;
  transition:color .2s var(--ease),border-color .2s var(--ease);
}
.chapter-link:hover{color:var(--paper)}
.chapter-link.is-active{color:var(--gold-bright);border-left-color:var(--gold)}

/* ---------- 图片位（页面阶段放置 img / 内联 SVG） ---------- */
.media-frame{
  position:relative;display:block;width:100%;overflow:hidden;
  border:1px solid var(--line);border-radius:14px;
  background:
    radial-gradient(circle at 22% 16%,rgba(217,169,58,.24),transparent 56%),
    repeating-linear-gradient(90deg,rgba(143,166,191,.14) 0 1px,transparent 1px 30px),
    repeating-linear-gradient(0deg,rgba(143,166,191,.14) 0 1px,transparent 1px 30px),
    linear-gradient(158deg,#123B3A,#0E1013 74%);
}
.media-frame::after{
  content:attr(data-caption);
  position:absolute;left:16px;bottom:14px;
  font-family:var(--font-mono);font-size:11px;letter-spacing:.2em;
  text-transform:uppercase;color:rgba(244,241,234,.6);
}
.media-frame img,.media-frame svg{width:100%;height:100%;object-fit:cover}
.media-frame--wide{aspect-ratio:16/9}
.media-frame--tall{aspect-ratio:4/5}
.media-frame--square{aspect-ratio:1/1}

/* ---------- 入场动效 ---------- */
.reveal{opacity:0;transform:translateY(12px)}
.reveal.is-visible{opacity:1;transform:none;transition:opacity var(--dur) var(--ease),transform var(--dur) var(--ease)}

/* ---------- 响应式 ---------- */
@media (min-width:1024px){
  .section{padding-block:96px}
  .section--tight{padding-block:56px}
}

@media (max-width:1024px){
  .col-2,.col-3,.col-4,.col-5{grid-column:span 6}
  .col-7,.col-8,.col-9,.col-10{grid-column:span 12}
  .chapter-rail{position:static;top:auto}
}

@media (max-width:900px){
  .masthead__bar-inner{grid-template-columns:1fr auto;min-height:0;padding-block:9px;gap:12px;font-size:11px}
  .masthead__sync{display:none}
  .masthead__tools{gap:14px;font-size:11px;letter-spacing:.06em}
  .masthead__crest{justify-content:center;gap:14px;padding-block:16px 12px}
  .crest-rule{display:none}
  .masthead__nav-row{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:10px;padding-bottom:12px}
  .nav-toggle{display:inline-flex;order:1}
  .nav-download{order:2}
  .nav{order:3;flex:1 1 100%;display:none;justify-self:stretch}
  .masthead[data-open] .nav{display:block}
  .nav__list{
    flex-direction:column;align-items:stretch;gap:0;
    margin-top:8px;border-top:1px solid var(--line);
    max-height:calc(100vh - 230px);overflow-y:auto;
  }
  .nav__link{display:block;padding:14px 6px;border-bottom:1px solid rgba(143,166,191,.14);font-size:14.5px}
  .nav__link::after{display:none}
  .nav__link[aria-current="page"]{
    color:var(--gold-bright);border-left:3px solid var(--gold);
    padding-left:13px;background:rgba(217,169,58,.09);
  }
  .footer__mast{padding-block:40px 28px}
  .footer__grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:28px}
}

@media (max-width:768px){
  :root{--gutter:18px}
  body{font-size:16px}
  .section{padding-block:56px}
  .section--tight{padding-block:36px}
  .grid{grid-template-columns:1fr;gap:16px}
  [class^="col-"],[class*=" col-"]{grid-column:1 / -1}
  .page-head{padding-block:36px 28px}
  .card,.card--feature{padding:20px}
  .card--cut{clip-path:polygon(16px 0,100% 0,100% 100%,0 100%,0 16px)}
  .footer__grid{grid-template-columns:1fr;gap:24px;padding-block:32px}
  .footer__contact{gap:18px 24px;padding-block:26px}
  .contact-item{min-width:0;flex:1 1 100%}
  .footer__legal{flex-direction:column;align-items:flex-start;gap:10px;padding-block:22px 34px}
  .footer__copy{margin-right:0}
  .btn{width:100%}
  .footer__cta{width:auto}
  .chapter-rail{display:none}
}

@media (max-width:480px){
  .display-title{font-size:clamp(36px,10vw,54px)}
  .masthead__tools .tool-link{font-size:10.5px}
  .brand__mark{width:32px;height:32px;font-size:14px}
}

@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
    scroll-behavior:auto !important;
  }
  html{scroll-behavior:auto}
  .reveal{opacity:1;transform:none}
  .masthead__pulse{animation:none}
  .btn:hover{transform:none}
}