*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{margin:0}

:root{
  --ink-900:#061B33;
  --ink-800:#08223D;
  --ink-700:#0B2D4F;
  --ink-500:#14507A;
  --gold-500:#D8A84E;
  --gold-200:#F3D9A4;
  --cinnabar:#C6473A;
  --celadon:#7FAE9A;
  --mist:#F5F7F8;
  --ink-text:#10202F;
  --line:#D7DEE5;
  --line-dark:rgba(216,168,78,.26);
  --text-on-dark:#EAF1F7;
  --text-soft-dark:#A9BCCE;
  --text-mute-dark:#8FA5B8;
  --radius-lg:28px;
  --radius-md:18px;
  --radius-sm:12px;
  --pill:999px;
  --font-display:system-ui,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  --font-body:system-ui,-apple-system,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  --font-mono:ui-monospace,SFMono-Regular,Consolas,"Liberation Mono",monospace;
  --wrap:1220px;
  --gutter:clamp(18px,4vw,48px);
  --shadow-panel:0 26px 60px -34px rgba(3,12,23,.85);
}

body{
  background:var(--ink-900);
  color:var(--text-on-dark);
  font-family:var(--font-body);
  font-size:16px;
  line-height:1.75;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}

h1,h2,h3,h4,h5{
  margin:0;
  font-family:var(--font-display);
  font-weight:800;
  line-height:1.12;
  letter-spacing:-.02em;
}
p{margin:0}
a{color:inherit;text-decoration:none}
ul,ol{margin:0;padding:0;list-style:none}
img,svg{display:block;max-width:100%}
button{font:inherit}
:focus-visible{outline:2px solid var(--gold-500);outline-offset:3px;border-radius:3px}

/* ---------- 容器与排版基元 ---------- */
.wrap{
  width:100%;
  max-width:var(--wrap);
  margin-inline:auto;
  padding-inline:var(--gutter);
}
.section{padding-block:clamp(44px,7vw,96px)}
.section--tight{padding-block:clamp(28px,4.5vw,56px)}

.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-family:var(--font-mono);
  font-size:11.5px;
  font-weight:700;
  letter-spacing:.2em;
  text-transform:uppercase;
  color:var(--gold-500);
}
.eyebrow::before{
  content:"";
  width:24px;
  height:1px;
  background:currentColor;
  flex:0 0 auto;
}
.display{
  font-family:var(--font-display);
  font-weight:800;
  font-size:clamp(38px,7.4vw,92px);
  line-height:.98;
  letter-spacing:-.035em;
}
.lede{
  font-size:clamp(15px,1.35vw,18px);
  line-height:1.85;
  color:var(--text-soft-dark);
  max-width:54ch;
}
.mono{
  font-family:var(--font-mono);
  letter-spacing:.04em;
  font-variant-numeric:tabular-nums;
}

.tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:5px 13px;
  border-radius:var(--pill);
  font-size:12.5px;
  font-weight:700;
  line-height:1.5;
  border:1px solid rgba(127,174,154,.5);
  background:rgba(127,174,154,.13);
  color:#BCE1D2;
}
.tag--gold{
  border-color:rgba(216,168,78,.5);
  background:rgba(216,168,78,.13);
  color:var(--gold-200);
}
.tag--red{
  border-color:rgba(198,71,58,.55);
  background:rgba(198,71,58,.15);
  color:#F2B6AE;
}

/* ---------- 跳转链接 ---------- */
.skip-link{
  position:fixed;
  top:10px;
  left:10px;
  z-index:200;
  padding:10px 20px;
  border-radius:var(--pill);
  background:var(--gold-500);
  color:#20160A;
  font-size:14px;
  font-weight:800;
  transform:translateY(-180%);
  transition:transform .2s ease;
}
.skip-link:focus{transform:translateY(0)}

/* ---------- 头部框架 ---------- */
.site-header{
  --hdr-h:78px;
  position:sticky;
  top:0;
  z-index:80;
  isolation:isolate;
  color:var(--text-on-dark);
  background:
    radial-gradient(120% 160% at 88% -30%,rgba(20,80,122,.9) 0%,rgba(6,27,51,0) 58%),
    linear-gradient(180deg,#071E38 0%,#061B33 100%);
  border-bottom:1px solid var(--line-dark);
}
.site-header::before{
  content:"";
  position:absolute;
  top:0;
  bottom:0;
  left:0;
  width:3px;
  background:linear-gradient(180deg,var(--gold-500) 0%,rgba(216,168,78,.15) 72%,rgba(216,168,78,0) 100%);
  pointer-events:none;
  z-index:3;
}
.header-inner{
  width:100%;
  max-width:var(--wrap);
  margin-inline:auto;
  padding-inline:var(--gutter);
  min-height:var(--hdr-h);
  display:flex;
  align-items:center;
  gap:clamp(14px,2.2vw,32px);
}

/* 品牌字标 */
.brand{
  display:inline-flex;
  align-items:center;
  gap:12px;
  flex:0 0 auto;
  border-radius:var(--radius-sm);
}
.brand-mark{
  display:grid;
  place-items:center;
  width:38px;
  height:38px;
  flex:0 0 auto;
  border-radius:12px;
  background:linear-gradient(145deg,#123E63 0%,#061B33 100%);
  border:1px solid rgba(216,168,78,.55);
  box-shadow:inset 0 1px 0 rgba(243,217,164,.3);
  color:var(--gold-200);
  font-family:var(--font-display);
  font-size:17px;
  font-weight:800;
  line-height:1;
  transition:border-color .2s ease,box-shadow .2s ease;
}
.brand:hover .brand-mark{
  border-color:var(--gold-500);
  box-shadow:inset 0 1px 0 rgba(243,217,164,.4),0 0 0 3px rgba(216,168,78,.14);
}
.brand-text{
  display:flex;
  flex-direction:column;
  gap:3px;
  line-height:1.15;
}
.brand-name{
  font-family:var(--font-display);
  font-size:17px;
  font-weight:800;
  letter-spacing:.02em;
  color:#F5F7F8;
  white-space:nowrap;
}
.brand-badge{
  font-family:var(--font-mono);
  font-size:10px;
  font-weight:700;
  letter-spacing:.16em;
  text-transform:uppercase;
  color:var(--gold-500);
  white-space:nowrap;
}

/* 导航 */
.nav{
  margin-left:auto;
  display:flex;
  align-items:center;
}
.nav-list{
  display:flex;
  align-items:center;
  gap:2px;
}
.nav-link{
  display:inline-block;
  padding:9px 13px;
  border-radius:var(--pill);
  border:1px solid transparent;
  font-size:14.5px;
  line-height:1.4;
  color:#B7C7D6;
  white-space:nowrap;
  transition:color .18s ease,background-color .18s ease,border-color .18s ease;
}
.nav-link:hover{
  color:var(--gold-200);
  background:rgba(216,168,78,.09);
  border-color:rgba(216,168,78,.3);
}
.nav-link[aria-current="page"]{
  color:#1A1206;
  font-weight:800;
  background:linear-gradient(135deg,var(--gold-200) 0%,var(--gold-500) 100%);
  border-color:rgba(243,217,164,.95);
  box-shadow:0 8px 18px -12px rgba(216,168,78,.95);
}
.nav-member{display:none}

/* 头部动作区 */
.header-actions{
  display:flex;
  align-items:center;
  gap:10px;
  flex:0 0 auto;
}

/* 按钮体系 */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:11px 22px;
  border-radius:var(--pill);
  border:1px solid transparent;
  font-family:var(--font-body);
  font-size:14.5px;
  font-weight:700;
  line-height:1.4;
  cursor:pointer;
  text-align:center;
  transition:background-color .2s ease,color .2s ease,border-color .2s ease,box-shadow .2s ease;
}
.btn--gold{
  background:linear-gradient(135deg,var(--gold-200) 0%,var(--gold-500) 62%);
  color:#231705;
  box-shadow:0 14px 28px -18px rgba(216,168,78,.95);
}
.btn--gold:hover{
  background:linear-gradient(135deg,#FFE8B9 0%,var(--gold-500) 70%);
  box-shadow:0 18px 32px -16px rgba(216,168,78,1);
}
.btn--ghost{
  background:rgba(20,80,122,.28);
  border-color:rgba(216,168,78,.45);
  color:var(--gold-200);
}
.btn--ghost:hover{
  background:rgba(216,168,78,.14);
  border-color:var(--gold-500);
  color:#FFF3D6;
}
.btn--dark{
  background:var(--ink-700);
  border-color:rgba(255,255,255,.12);
  color:var(--text-on-dark);
}
.btn--dark:hover{
  background:var(--ink-500);
  border-color:rgba(216,168,78,.5);
}
.btn--cinnabar{
  background:var(--cinnabar);
  color:#FFF4F1;
}
.btn--cinnabar:hover{background:#D4574A}

/* 汉堡按钮 */
.nav-toggle{
  display:none;
  align-items:center;
  gap:9px;
  padding:9px 16px;
  border-radius:var(--pill);
  border:1px solid rgba(216,168,78,.45);
  background:rgba(20,80,122,.35);
  color:var(--gold-200);
  font-size:14px;
  font-weight:700;
  cursor:pointer;
  transition:background-color .2s ease,border-color .2s ease,color .2s ease;
}
.nav-toggle:hover{
  background:rgba(216,168,78,.14);
  border-color:var(--gold-500);
  color:#FFF3D6;
}
.nav-toggle-bars{
  position:relative;
  display:block;
  width:16px;
  height:10px;
  flex:0 0 auto;
}
.nav-toggle-bars::before,
.nav-toggle-bars::after{
  content:"";
  position:absolute;
  left:0;
  width:16px;
  height:2px;
  border-radius:2px;
  background:currentColor;
  transition:top .24s ease,transform .24s ease;
}
.nav-toggle-bars::before{top:0}
.nav-toggle-bars::after{top:8px}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars::before{top:4px;transform:rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars::after{top:4px;transform:rotate(-45deg)}
.nav-toggle-label{white-space:nowrap}

/* 滚动进度线 */
.header-progress{
  position:absolute;
  left:0;
  bottom:-1px;
  z-index:2;
  height:2px;
  width:0;
  background:linear-gradient(90deg,var(--gold-500) 0%,var(--gold-200) 48%,var(--celadon) 100%);
  box-shadow:0 0 12px rgba(216,168,78,.65);
  pointer-events:none;
  transition:width .08s linear;
}

/* ---------- 通用面板与网格 ---------- */
.panel{
  position:relative;
  padding:clamp(22px,3vw,40px);
  border-radius:var(--radius-lg);
  border:1px solid rgba(216,168,78,.16);
  background:
    radial-gradient(110% 130% at 92% 0%,rgba(20,80,122,.55) 0%,rgba(11,45,79,0) 62%),
    linear-gradient(160deg,rgba(20,80,122,.4) 0%,rgba(11,45,79,.86) 58%,rgba(6,27,51,.94) 100%);
  box-shadow:var(--shadow-panel);
  overflow:hidden;
}
.panel--flat{
  background:rgba(11,45,79,.55);
  box-shadow:none;
}
.panel--light{
  background:linear-gradient(165deg,#FFFFFF 0%,var(--mist) 100%);
  border-color:var(--line);
  color:var(--ink-text);
  box-shadow:0 22px 48px -34px rgba(16,32,47,.45);
}

.grid{display:grid;gap:clamp(16px,2vw,28px)}
.grid--split{grid-template-columns:minmax(0,7fr) minmax(0,4fr)}
.grid--rail{grid-template-columns:minmax(0,5fr) minmax(0,6fr)}
.grid--3{grid-template-columns:repeat(3,minmax(0,1fr))}

/* ---------- 面包屑 ---------- */
.breadcrumb{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  font-family:var(--font-mono);
  font-size:12.5px;
  letter-spacing:.05em;
  color:var(--text-mute-dark);
}
.breadcrumb a{color:#B7C7D6;transition:color .18s ease}
.breadcrumb a:hover{color:var(--gold-200)}
.breadcrumb li{display:inline-flex;align-items:center;gap:8px}
.breadcrumb li+li::before{
  content:"/";
  color:rgba(216,168,78,.55);
}

/* ---------- 长文容器 ---------- */
.prose{
  max-width:68ch;
  font-size:16.5px;
  line-height:1.85;
  color:inherit;
}
.prose>*+*{margin-top:1.05em}
.prose h2{
  font-size:clamp(22px,2.4vw,30px);
  margin-top:1.9em;
}
.prose h3{
  font-size:clamp(18px,1.9vw,22px);
  margin-top:1.5em;
}
.prose ul,.prose ol{
  list-style:revert;
  padding-left:1.4em;
}
.prose li+li{margin-top:.45em}
.prose a{
  color:var(--gold-500);
  text-decoration:underline;
  text-underline-offset:3px;
  transition:color .18s ease;
}
.prose a:hover{color:var(--gold-200)}
.prose strong{font-weight:800}
.prose hr{
  border:0;
  border-top:1px solid rgba(216,168,78,.22);
  margin-block:2em;
}

/* ---------- 浅色体系 ---------- */
.theme-light{
  background:var(--mist);
  color:var(--ink-text);
}
.theme-light .lede{color:#4A5D6E}
.theme-light .breadcrumb{color:#68798A}
.theme-light .breadcrumb a{color:#3F5468}
.theme-light .breadcrumb a:hover{color:#8A5A12}
.theme-light .prose a{color:#8A5A12}
.theme-light .prose a:hover{color:#B4771A}
.theme-light .eyebrow{color:#8A5A12}

/* ---------- 图片容器基础 ---------- */
.media-frame{
  position:relative;
  width:100%;
  aspect-ratio:16/10;
  border-radius:var(--radius-md);
  overflow:hidden;
  border:1px solid rgba(216,168,78,.2);
  background:
    radial-gradient(120% 130% at 18% 0%,rgba(20,80,122,.92) 0%,rgba(6,27,51,0) 62%),
    linear-gradient(150deg,#0B2D4F 0%,#061B33 100%);
}
.media-frame img{
  width:100%;
  height:100%;
  object-fit:cover;
}
.media-frame::after{
  content:"";
  position:absolute;
  inset:0;
  pointer-events:none;
  opacity:.45;
  background-image:
    linear-gradient(90deg,rgba(216,168,78,.14) 1px,transparent 1px),
    linear-gradient(180deg,rgba(216,168,78,.14) 1px,transparent 1px);
  background-size:52px 52px;
}
.media-frame--wide{aspect-ratio:21/9}
.media-frame--square{aspect-ratio:1/1}
.media-frame--portrait{aspect-ratio:4/5}

/* ---------- 显现 ---------- */
[data-reveal]{transition-delay:var(--reveal-delay,0s)}
html.js-reveal [data-reveal]{
  opacity:0;
  transform:translateY(18px);
  transition:opacity .62s cubic-bezier(.22,.7,.3,1),transform .62s cubic-bezier(.22,.7,.3,1);
  transition-delay:var(--reveal-delay,0s);
}
html.js-reveal [data-reveal].is-visible{
  opacity:1;
  transform:none;
}

/* ---------- 页脚 ---------- */
.site-footer{
  position:relative;
  margin-top:clamp(48px,8vw,104px);
  color:var(--text-on-dark);
  border-top:1px solid var(--line-dark);
  background:
    radial-gradient(95% 130% at 10% 0%,rgba(20,80,122,.55) 0%,rgba(6,27,51,0) 62%),
    linear-gradient(180deg,#08223D 0%,#051829 100%);
}
.footer-grid{
  display:grid;
  grid-template-columns:1.5fr 1fr 1.3fr 1fr;
  gap:clamp(24px,3vw,52px);
  padding-block:clamp(38px,5vw,68px) clamp(26px,3.5vw,46px);
}
.footer-col{min-width:0}
.footer-title{
  margin-bottom:16px;
  font-family:var(--font-mono);
  font-size:11.5px;
  font-weight:700;
  letter-spacing:.2em;
  text-transform:uppercase;
  color:var(--gold-500);
}
.brand--footer{margin-bottom:16px}
.footer-desc{
  font-size:14.5px;
  line-height:1.85;
  color:var(--text-soft-dark);
  max-width:36ch;
}
.footer-note{
  margin-top:14px;
  padding-left:12px;
  border-left:2px solid rgba(127,174,154,.6);
  font-size:13px;
  line-height:1.7;
  color:var(--celadon);
}
.footer-links{
  display:grid;
  gap:10px;
}
.footer-links a{
  position:relative;
  display:inline-block;
  font-size:14.5px;
  color:var(--text-soft-dark);
  transition:color .18s ease;
}
.footer-links a::after{
  content:"";
  position:absolute;
  left:0;
  bottom:-2px;
  width:0;
  height:1px;
  background:var(--gold-500);
  transition:width .24s ease;
}
.footer-links a:hover{color:var(--gold-200)}
.footer-links a:hover::after{width:100%}

.footer-meta{display:grid;gap:14px}
.footer-meta li{
  display:grid;
  gap:3px;
  min-width:0;
}
.meta-label{
  font-family:var(--font-mono);
  font-size:10.5px;
  font-weight:700;
  letter-spacing:.18em;
  text-transform:uppercase;
  color:var(--celadon);
}
.meta-value{
  font-family:var(--font-mono);
  font-size:13.5px;
  line-height:1.65;
  color:#E4EDF5;
  word-break:break-word;
}

.footer-base{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:12px 26px;
  padding-block:18px 26px;
  border-top:1px solid rgba(216,168,78,.18);
}
.footer-copy{
  font-family:var(--font-mono);
  font-size:12.5px;
  letter-spacing:.06em;
  color:var(--text-mute-dark);
}
.footer-legal{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px 20px;
  font-size:13px;
}
.footer-legal a{
  color:var(--text-soft-dark);
  transition:color .18s ease;
}
.footer-legal a:hover{color:var(--gold-200)}

/* ---------- 响应式 ---------- */
@media (max-width:1024px){
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (max-width:960px){
  .site-header{--hdr-h:66px}
  .brand-name{font-size:16px}
  .nav-toggle{display:inline-flex}
  .header-actions{margin-left:auto}
  .header-cta{display:none}
  .nav{
    position:fixed;
    top:var(--hdr-h);
    left:0;
    right:0;
    z-index:70;
    display:block;
    margin-left:0;
    max-height:calc(100vh - var(--hdr-h));
    overflow-y:auto;
    padding:16px var(--gutter) 30px;
    background:linear-gradient(180deg,#0B2D4F 0%,#061B33 100%);
    border-bottom:1px solid rgba(216,168,78,.4);
    box-shadow:0 34px 64px -30px #000;
    opacity:0;
    visibility:hidden;
    pointer-events:none;
    transform:translateY(-10px);
    transition:opacity .22s ease,transform .22s ease,visibility .22s ease;
  }
  .nav[data-open]{
    opacity:1;
    visibility:visible;
    pointer-events:auto;
    transform:none;
  }
  .nav-list{
    flex-direction:column;
    align-items:stretch;
    gap:6px;
  }
  .nav-link{
    display:block;
    padding:13px 18px;
    border-radius:14px;
    border-color:rgba(255,255,255,.07);
    background:rgba(255,255,255,.035);
    font-size:16px;
  }
  .nav-link:hover{background:rgba(216,168,78,.14)}
  .nav-member{
    display:block;
    margin-top:16px;
    padding:13px 18px;
    border-radius:14px;
    background:linear-gradient(135deg,var(--gold-200) 0%,var(--gold-500) 100%);
    color:#231705;
    font-weight:800;
    text-align:center;
    transition:filter .2s ease;
  }
  .nav-member:hover{filter:brightness(1.06)}
  body.nav-open{overflow:hidden}
  .grid--split,.grid--rail,.grid--3{grid-template-columns:minmax(0,1fr)}
}
@media (max-width:720px){
  .footer-grid{grid-template-columns:minmax(0,1fr)}
  .footer-base{flex-direction:column;align-items:flex-start}
  .footer-desc{max-width:100%}
}
@media (max-width:480px){
  .brand-mark{width:32px;height:32px;border-radius:10px;font-size:15px}
  .brand-name{font-size:15px}
  .brand-badge{font-size:9px;letter-spacing:.12em}
  .nav-toggle{padding:8px 13px;font-size:13px}
  .nav-toggle-label{display:none}
}

/* ---------- 减少动态 ---------- */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
    scroll-behavior:auto !important;
  }
  html.js-reveal [data-reveal]{
    opacity:1;
    transform:none;
  }
}