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

:root{
  --royal:#2B0B3F;
  --royal-2:#4A1470;
  --ink:#0A0710;
  --gold:#F7C948;
  --gold-soft:#FFE49B;
  --wood:#B77A3C;
  --neon:#3FC6FF;
  --paper:#F4E9D8;
  --glass:rgba(255,255,255,.08);
  --muted:#B9A9C9;
  --alert:#E2453A;
  --line:rgba(244,233,216,.14);
  --shell-w:1200px;
  --r-pill:999px;
  --r-lg:22px;
  --r-md:14px;
  --ease:cubic-bezier(.22,.61,.36,1);
  --shadow-float:0 18px 40px rgba(5,2,10,.55);
  --font-head:"Noto Sans SC","Source Han Sans SC","PingFang SC","Microsoft YaHei",system-ui,sans-serif;
  --font-body:system-ui,-apple-system,"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
  --font-mono:"DIN Alternate","Roboto Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
}

body{
  min-height:100vh;
  font-family:var(--font-body);
  font-size:16px;
  line-height:1.4;
  color:var(--paper);
  background-color:var(--ink);
  background-image:
    radial-gradient(900px 520px at 82% -8%, rgba(247,201,72,.20), transparent 62%),
    radial-gradient(760px 460px at 3% 6%, rgba(63,198,255,.14), transparent 60%),
    radial-gradient(1200px 820px at 50% 118%, rgba(74,20,112,.85), transparent 72%),
    radial-gradient(rgba(255,255,255,.045) 1px, transparent 1px),
    linear-gradient(180deg,#2B0B3F 0%, #240A35 46%, #0A0710 100%);
  background-repeat:no-repeat,no-repeat,no-repeat,repeat,no-repeat;
  background-size:auto,auto,auto,4px 4px,auto;
}

h1,h2,h3,h4{font-family:var(--font-head);font-weight:900;letter-spacing:-.02em;line-height:1.06}
a:hover{color:var(--gold-soft)}
:focus-visible{outline:3px solid var(--neon);outline-offset:3px;border-radius:6px}
::selection{background:var(--gold);color:var(--ink)}

.shell{width:100%;max-width:var(--shell-w);margin:0 auto;padding:0 clamp(16px,3vw,28px)}
.rule{height:1px;border:0;background:linear-gradient(90deg,transparent,rgba(247,201,72,.55),transparent)}
.cut-top{clip-path:polygon(0 5vw,100% 0,100% 100%,0 100%)}
.cut-bottom{clip-path:polygon(0 0,100% 0,100% calc(100% - 5vw),0 100%)}

/* ===== 顶部 ===== */
.site-header{
  position:sticky;top:0;z-index:60;
  padding:16px clamp(12px,2.6vw,28px);
  transition:padding .28s var(--ease);
}
.site-header[data-scrolled]{padding-top:8px;padding-bottom:8px}
.header-shell{
  display:flex;align-items:center;gap:10px;
  max-width:var(--shell-w);margin:0 auto;
  transition:max-width .28s var(--ease);
}
.site-header[data-scrolled] .header-shell{max-width:1080px}

.skip-link{
  position:absolute;left:16px;top:-64px;z-index:80;
  padding:10px 20px;border-radius:var(--r-pill);
  background:var(--gold);color:var(--ink);
  font-family:var(--font-head);font-weight:900;font-size:14px;
  transition:top .2s var(--ease);
}
.skip-link:focus{top:8px;color:var(--ink)}

.brand{
  display:inline-flex;align-items:center;gap:10px;flex:0 0 auto;
  padding:8px 16px 8px 10px;
  border-radius:var(--r-pill);
  background:linear-gradient(135deg,rgba(43,11,63,.94),rgba(10,7,16,.94));
  border:1px solid rgba(247,201,72,.42);
  box-shadow:var(--shadow-float);
  color:var(--paper);
  transition:border-color .2s var(--ease),color .2s var(--ease),padding .28s var(--ease);
}
.brand:hover{color:var(--gold-soft);border-color:var(--gold)}
.brand--footer{box-shadow:none;background:rgba(255,255,255,.05);border-color:rgba(247,201,72,.32);padding:7px 14px 7px 9px}
.brand-mark{width:38px;height:38px;flex:0 0 auto}
.brand-mark svg{width:100%;height:100%;overflow:visible}
.bm-ring{fill:none;stroke:var(--gold);stroke-width:2}
.bm-ball{fill:none;stroke:var(--paper);stroke-width:1.5;opacity:.9}
.bm-line{fill:none;stroke:var(--gold-soft);stroke-width:1.2;opacity:.85}
.bm-arc{fill:none;stroke:var(--neon);stroke-width:1.7;opacity:.9}
.brand-text{display:flex;flex-direction:column;line-height:1.04}
.brand-name{font-family:var(--font-head);font-weight:900;font-size:19px;letter-spacing:.02em}
.brand-sub{
  font-size:10px;letter-spacing:.3em;color:var(--muted);
  max-height:16px;opacity:1;overflow:hidden;
  transition:opacity .25s var(--ease),max-height .25s var(--ease);
}
.site-header[data-scrolled] .brand-sub{opacity:0;max-height:0}
.site-header[data-scrolled] .brand{padding-top:5px;padding-bottom:5px}

.nav-capsule{
  flex:1 1 auto;display:flex;justify-content:center;
  padding:6px;border-radius:var(--r-pill);
  background:var(--glass);
  border:1px solid rgba(244,233,216,.16);
  backdrop-filter:blur(14px) saturate(1.1);
  -webkit-backdrop-filter:blur(14px) saturate(1.1);
  box-shadow:0 10px 30px rgba(5,2,10,.35);
  transition:background-color .28s var(--ease),border-color .28s var(--ease);
}
.site-header[data-scrolled] .nav-capsule{background:rgba(10,7,16,.72);border-color:rgba(247,201,72,.28)}
.nav-list{display:flex;align-items:center;gap:2px;flex-wrap:nowrap}
.nav-item{flex:0 0 auto}
.nav-link{
  display:block;padding:9px 14px;border-radius:var(--r-pill);
  font-size:15px;font-weight:700;color:var(--paper);white-space:nowrap;
  transition:background-color .2s var(--ease),color .2s var(--ease);
}
.nav-link:hover{background:rgba(247,201,72,.16);color:var(--gold-soft)}
.nav-link:focus-visible{outline-color:var(--gold)}
.nav-link[aria-current="page"]{background:var(--gold);color:var(--ink)}

.header-actions{display:flex;align-items:center;gap:8px;flex:0 0 auto}
.icon-btn{
  display:inline-flex;align-items:center;justify-content:center;
  width:44px;height:44px;border-radius:var(--r-pill);
  background:rgba(10,7,16,.78);
  border:1px solid rgba(63,198,255,.45);
  color:var(--neon);box-shadow:var(--shadow-float);
  transition:transform .2s var(--ease),border-color .2s var(--ease),color .2s var(--ease);
}
.icon-btn svg{width:20px;height:20px;fill:none;stroke:currentColor;stroke-width:2;stroke-linecap:round}
.icon-btn:hover{color:var(--gold);border-color:var(--gold);transform:translateY(-2px)}

.nav-toggle{
  display:none;align-items:center;gap:8px;
  padding:11px 15px;border-radius:var(--r-pill);
  background:rgba(10,7,16,.85);
  border:1px solid rgba(247,201,72,.5);
  color:var(--gold);font-weight:700;font-size:14px;
  box-shadow:var(--shadow-float);
  transition:background-color .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease);
}
.nav-toggle-bars{display:inline-flex;flex-direction:column;gap:4px;width:18px}
.nav-toggle-bars span{display:block;height:2px;border-radius:2px;background:currentColor}
.nav-toggle[aria-expanded="true"]{background:var(--gold);color:var(--ink);border-color:var(--gold)}
.nav-toggle-label{letter-spacing:.08em}

.scroll-progress{
  position:absolute;left:0;right:0;bottom:0;height:2px;
  transform:scaleX(var(--progress,0));transform-origin:0 50%;
  background:linear-gradient(90deg,var(--gold),var(--neon));
  opacity:.9;pointer-events:none;
}

/* ===== 按钮 ===== */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:11px 20px;border-radius:var(--r-pill);
  font-family:var(--font-head);font-weight:900;font-size:15px;letter-spacing:.02em;
  border:1px solid transparent;
  transition:transform .2s var(--ease),background-color .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease);
}
.btn-gold{background:linear-gradient(135deg,var(--gold),#E9A81F);color:var(--ink);box-shadow:0 10px 24px rgba(247,201,72,.28)}
.btn-gold:hover{background:linear-gradient(135deg,var(--gold-soft),var(--gold));color:var(--ink);transform:translateY(-2px)}
.btn-ghost{background:rgba(255,255,255,.06);border-color:rgba(244,233,216,.28);color:var(--paper)}
.btn-ghost:hover{border-color:var(--gold);color:var(--gold-soft);transform:translateY(-2px)}
.btn-neon{background:rgba(63,198,255,.14);border-color:rgba(63,198,255,.5);color:var(--neon)}
.btn-neon:hover{background:rgba(63,198,255,.24);color:#fff;transform:translateY(-2px)}

/* ===== 页脚 ===== */
.site-footer{
  margin-top:clamp(48px,8vw,96px);
  background-color:var(--ink);
  background-image:
    radial-gradient(rgba(255,255,255,.05) 1px, transparent 1px),
    linear-gradient(180deg,#0A0710 0%, #16061F 100%);
  background-size:4px 4px,auto;
  border-top:1px solid rgba(247,201,72,.28);
  color:var(--muted);
}
.footer-shell{max-width:var(--shell-w);margin:0 auto;padding:clamp(32px,5vw,64px) clamp(16px,3vw,28px) 20px}
.footer-grid{display:grid;grid-template-columns:1.3fr 1fr 1.35fr 1.4fr;gap:clamp(20px,3vw,32px)}
.footer-col{min-width:0}
.footer-title{
  font-family:var(--font-head);font-weight:900;font-size:12px;
  letter-spacing:.3em;color:var(--gold);margin-bottom:14px;
}
.footer-line{margin-top:14px;font-size:14.5px;line-height:1.5;color:var(--paper);max-width:32ch}
.footer-list li{margin-bottom:9px}
.footer-list a{
  color:var(--paper);font-size:14.5px;font-weight:600;
  border-bottom:1px solid transparent;
  transition:color .2s var(--ease),border-color .2s var(--ease);
}
.footer-list a:hover{color:var(--gold);border-bottom-color:rgba(247,201,72,.55)}
.footer-contact li{display:flex;flex-wrap:wrap;align-items:baseline;gap:6px 10px;margin-bottom:13px}
.footer-label{font-size:10.5px;letter-spacing:.24em;color:var(--gold-soft);text-transform:uppercase}
.footer-value{font-size:14.5px;font-weight:600;color:var(--paper);word-break:break-word}
.copy-btn{
  font-size:12px;font-weight:700;padding:4px 11px;border-radius:var(--r-pill);
  border:1px solid rgba(63,198,255,.5);color:var(--neon);
  transition:background-color .2s var(--ease),color .2s var(--ease);
}
.copy-btn:hover{background:rgba(63,198,255,.18);color:#fff}
.footer-note{font-size:13.5px;line-height:1.6;color:var(--muted)}
.footer-note a{color:var(--neon);border-bottom:1px solid rgba(63,198,255,.45)}
.footer-note a:hover{color:var(--gold-soft)}
.footer-icp{
  margin-top:12px;font-family:var(--font-mono);font-size:14px;
  letter-spacing:.04em;color:var(--paper);
}
.footer-base{
  display:flex;flex-wrap:wrap;gap:8px 24px;justify-content:space-between;
  margin-top:clamp(24px,4vw,42px);padding-top:16px;
  border-top:1px solid var(--line);
  font-size:12.5px;color:var(--muted);
}
.footer-copy{margin:0}

.copy-toast{
  position:fixed;left:50%;bottom:26px;z-index:90;
  padding:10px 22px;border-radius:var(--r-pill);
  background:var(--gold);color:var(--ink);
  font-family:var(--font-head);font-weight:900;font-size:14px;
  box-shadow:0 14px 30px rgba(247,201,72,.32);
  opacity:0;transform:translate(-50%,18px);pointer-events:none;
  transition:opacity .25s var(--ease),transform .25s var(--ease);
}
.copy-toast.is-visible{opacity:1;transform:translate(-50%,0)}

/* ===== 页面通用块 ===== */
.section{padding:clamp(40px,7vw,88px) 0}
.section-head{
  display:flex;flex-wrap:wrap;align-items:flex-end;gap:12px 22px;
  padding-bottom:16px;margin-bottom:clamp(20px,3vw,36px);
  border-bottom:1px solid var(--line);
}
.section-title{font-size:clamp(28px,4.4vw,52px);letter-spacing:-.02em}
.eyebrow{font-family:var(--font-mono);font-size:12px;letter-spacing:.36em;color:var(--gold);text-transform:uppercase}
.eyebrow--side{
  writing-mode:vertical-rl;transform:rotate(180deg);
  letter-spacing:.5em;color:var(--gold-soft);
}
.lede{font-size:clamp(16px,1.6vw,19px);line-height:1.55;color:var(--muted);max-width:62ch}

.grid{display:grid;gap:clamp(14px,2vw,24px)}
.grid--2{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid--3{grid-template-columns:repeat(3,minmax(0,1fr))}

.card{
  position:relative;overflow:hidden;
  padding:clamp(18px,2.4vw,30px);
  border-radius:var(--r-lg);
  background:var(--royal-2);
  border:1px solid rgba(244,233,216,.12);
}
.card--glass{
  background:var(--glass);
  border-color:rgba(244,233,216,.2);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
}
.card--ink{background:var(--ink);border-color:rgba(247,201,72,.3)}
.card--cut{clip-path:polygon(0 0,100% 0,100% calc(100% - 30px),calc(100% - 30px) 100%,0 100%)}

.num{font-family:var(--font-mono);font-weight:700;font-variant-numeric:tabular-nums;letter-spacing:-.01em}
.num--hero{font-size:clamp(56px,12vw,150px);line-height:.85}

.tag{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 11px;border-radius:var(--r-pill);
  font-size:12px;font-weight:700;letter-spacing:.06em;
  background:rgba(244,233,216,.1);color:var(--paper);
}
.tag--gold{background:rgba(247,201,72,.18);color:var(--gold-soft)}
.tag--neon{background:rgba(63,198,255,.16);color:var(--neon)}
.tag--wood{background:rgba(183,122,60,.26);color:#F2D6AE}
.tag--live{background:rgba(226,69,58,.22);color:#FF9E96}

.media{
  position:relative;display:block;overflow:hidden;
  border-radius:var(--r-lg);
  background:var(--ink);
  border:1px solid rgba(244,233,216,.12);
}
.media::after{
  content:"";position:absolute;inset:0;z-index:1;pointer-events:none;
  background:radial-gradient(circle at 50% 38%, transparent 42%, rgba(10,7,16,.6) 100%);
}
.media-frame{
  position:relative;display:block;width:100%;
  aspect-ratio:16/10;
  background:
    radial-gradient(circle at 50% 120%, rgba(183,122,60,.5), transparent 62%),
    repeating-linear-gradient(115deg, rgba(255,255,255,.05) 0 2px, transparent 2px 9px),
    linear-gradient(150deg,#3A1057,#140822 72%);
}
.media-frame--tall{aspect-ratio:3/4}
.media-frame--wide{aspect-ratio:21/9}
.media-frame--square{aspect-ratio:1/1}
.media-frame img,.media-img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.media-caption{
  position:absolute;left:0;right:0;bottom:0;z-index:2;
  padding:16px 16px 12px;
  font-size:13px;line-height:1.45;color:var(--paper);
  background:linear-gradient(0deg,rgba(10,7,16,.92),rgba(10,7,16,0));
}
.media--contrast img{filter:contrast(1.18) saturate(1.08)}
.media--blur img{filter:blur(1.4px) contrast(1.12) saturate(1.05)}

.crumbs{display:flex;flex-wrap:wrap;align-items:center;gap:8px;padding:16px 0;font-size:13px;color:var(--muted)}
.crumbs li{display:flex;align-items:center;gap:8px}
.crumbs li+li::before{content:"／";color:var(--wood)}
.crumbs a{color:var(--muted)}
.crumbs a:hover{color:var(--gold)}
.crumbs [aria-current="page"]{color:var(--paper);font-weight:700}

.prose{max-width:720px;margin:0 auto;padding:0 clamp(16px,3vw,28px)}
.prose h2{font-size:clamp(22px,2.6vw,30px);margin:2em 0 .6em}
.prose p{margin-bottom:1em;line-height:1.72;color:#E7DCCB}
.prose ul{list-style:disc;padding-left:1.2em;margin-bottom:1em}
.prose li{margin-bottom:.5em;line-height:1.7;color:#E7DCCB}

.tabs{display:block}
.tab-list{
  display:inline-flex;flex-wrap:wrap;gap:6px;padding:6px;
  border-radius:var(--r-pill);
  background:var(--glass);
  border:1px solid rgba(244,233,216,.18);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
}
.tab{
  padding:9px 18px;border-radius:var(--r-pill);
  font-size:14.5px;font-weight:700;color:var(--paper);
  transition:background-color .2s var(--ease),color .2s var(--ease);
}
.tab:hover{background:rgba(247,201,72,.16);color:var(--gold-soft)}
.tab[aria-selected="true"]{background:var(--gold);color:var(--ink)}
.tab-panel{margin-top:22px}
.tab-panel[hidden]{display:none}
.tab-panel.is-entering{animation:panelIn .28s var(--ease)}
@keyframes panelIn{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:none}}

.accordion{border-top:1px solid var(--line)}
.accordion-item{border-bottom:1px solid var(--line)}
.accordion-trigger{
  display:flex;width:100%;align-items:center;justify-content:space-between;gap:16px;
  padding:18px 4px;text-align:left;
  font-family:var(--font-head);font-weight:900;font-size:17px;color:var(--paper);
  transition:color .2s var(--ease);
}
.accordion-trigger:hover{color:var(--gold)}
.accordion-trigger::after{content:"＋";font-family:var(--font-mono);color:var(--gold);font-size:20px}
.accordion-trigger[aria-expanded="true"]::after{content:"－"}
.accordion-item.is-open .accordion-trigger{color:var(--gold)}
.accordion-panel{padding:0 4px 20px;font-size:15px;line-height:1.62;color:var(--muted)}
.accordion-panel[hidden]{display:none}

.reveal{opacity:0;transform:translateY(14px);transition:opacity .5s var(--ease),transform .5s var(--ease)}
.reveal.is-visible{opacity:1;transform:none}

/* ===== 平板 ===== */
@media (max-width:1080px) and (min-width:881px){
  .nav-link{padding:8px 11px;font-size:14px}
  .brand-sub{display:none}
}

/* ===== 移动端 ===== */
@media (max-width:880px){
  .site-header{padding:10px 12px}
  .header-shell{gap:8px}
  .brand{padding:6px 12px 6px 8px}
  .brand-mark{width:32px;height:32px}
  .brand-name{font-size:16px}
  .brand-sub{display:none}
  .header-actions{margin-left:auto}
  .header-actions .btn-gold{display:none}
  .nav-toggle{display:inline-flex}
  .nav-capsule{
    position:fixed;left:12px;right:12px;bottom:12px;
    flex-direction:column;justify-content:flex-start;
    padding:10px;border-radius:24px;
    background:rgba(10,7,16,.95);
    border-color:rgba(247,201,72,.3);
    opacity:0;visibility:hidden;transform:translateY(140%);
    transition:transform .3s var(--ease),opacity .3s var(--ease),visibility .3s linear;
    z-index:70;
  }
  .nav-capsule[data-open]{opacity:1;visibility:visible;transform:translateY(0)}
  .nav-list{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:6px;width:100%}
  .nav-item--wide-only{display:none}
  .nav-link{
    padding:13px 10px;text-align:center;font-size:15px;
    border:1px solid rgba(244,233,216,.14);
  }
  .grid--2,.grid--3{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (max-width:560px){
  .footer-grid{grid-template-columns:1fr}
  .footer-base{flex-direction:column}
  .icon-btn{width:40px;height:40px}
}

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