*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:112px}
body,h1,h2,h3,h4,h5,p,ul,ol,figure,blockquote,dl,dd{margin:0}
ul[class],ol[class]{list-style:none;padding:0}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0}
img,svg{display:block;max-width:100%}

:root{
  --font-sans:system-ui,-apple-system,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei","Heiti SC",sans-serif;
  --font-serif:"Songti SC","Source Han Serif SC","Noto Serif CJK SC",Georgia,"Times New Roman",serif;
  --c-ink:#0B1B2B;
  --c-ink-panel:#12293F;
  --c-cyan:#35E0D0;
  --c-amber:#F2B544;
  --c-paper:#F4EFE6;
  --c-cream:#FBF8F2;
  --c-slate:#8FA3B8;
  --c-teal:#0E6F68;
  --c-charcoal:#1A1A1A;
  --c-mist:#D7E8E4;
  --ink-line:rgba(143,163,184,.26);
  --ink-line-soft:rgba(143,163,184,.16);
  --ink-line-cyan:rgba(53,224,208,.45);
  --paper-line:rgba(11,27,43,.14);
  --radius-panel:26px;
  --radius-card:18px;
  --shadow-panel:0 34px 70px -46px rgba(0,0,0,.95);
  --header-gap:96px;
}

body{
  font-family:var(--font-sans);
  font-size:1rem;
  line-height:1.7;
  color:var(--c-cream);
  background:var(--c-ink);
  padding-top:var(--header-gap);
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}

:focus-visible{outline:2px solid var(--c-cyan);outline-offset:3px;border-radius:6px}
.is-paper :focus-visible,.panel--paper :focus-visible,.panel--cream :focus-visible{outline-color:var(--c-teal)}
#main-content:focus{outline:none}

/* ---------- 通用布局 ---------- */
.container{width:min(1200px,100% - 2.5rem);margin-inline:auto}
.section{position:relative;padding-block:clamp(2.5rem,5vw,4.5rem)}
.is-paper{
  --surface:var(--c-paper);
  --surface-text:var(--c-charcoal);
  --surface-line:var(--paper-line);
  --surface-accent:var(--c-teal);
  background:var(--surface);
  color:var(--surface-text);
}
.is-ink{background:var(--c-ink);color:var(--c-cream)}
.stack>*+*{margin-top:var(--stack-gap,1rem)}
.divider{height:1px;border:0;background:var(--ink-line);margin-block:clamp(1.5rem,3vw,2.5rem)}
.is-paper .divider{background:var(--paper-line)}

.grid{display:grid;gap:clamp(1rem,2vw,1.6rem)}
.grid--2{grid-template-columns:repeat(auto-fit,minmax(260px,1fr))}
.grid--3{grid-template-columns:repeat(auto-fit,minmax(230px,1fr))}
.grid--asym{grid-template-columns:minmax(0,7fr) minmax(0,5fr)}
@media (max-width:860px){.grid--asym{grid-template-columns:1fr}}

/* ---------- 排版 ---------- */
.eyebrow{
  display:inline-flex;align-items:center;gap:.6rem;
  font-family:var(--font-serif);
  font-size:.78rem;letter-spacing:.2em;text-transform:uppercase;
  color:var(--c-cyan);font-weight:600;
}
.eyebrow::before{content:"";width:22px;height:1px;background:currentColor;opacity:.7}
.is-paper .eyebrow,.panel--paper .eyebrow,.panel--cream .eyebrow{color:var(--c-teal)}
.h-display{font-size:clamp(2.4rem,5vw,4.6rem);line-height:1.04;letter-spacing:.02em;font-weight:800}
.h-section{font-size:clamp(1.6rem,2.6vw,2.4rem);line-height:1.18;letter-spacing:.015em;font-weight:800}
.h-card{font-size:clamp(1.08rem,1.5vw,1.32rem);line-height:1.36;font-weight:700;letter-spacing:.01em}
.prose{max-width:72ch;font-size:1.0625rem;line-height:1.72}
.prose p+p{margin-top:.9em}
.prose a{color:var(--c-cyan);text-decoration:underline;text-underline-offset:3px}
.is-paper .prose a,.panel--paper .prose a,.panel--cream .prose a{color:var(--c-teal)}

/* ---------- 面板 ---------- */
.panel{
  position:relative;
  border-radius:var(--radius-panel);
  padding:clamp(1.4rem,3vw,2.6rem);
  background:var(--c-ink-panel);
  border:1px solid var(--ink-line);
  box-shadow:var(--shadow-panel);
}
.panel--paper{background:var(--c-paper);color:var(--c-charcoal);border-color:var(--paper-line)}
.panel--cream{background:var(--c-cream);color:var(--c-charcoal);border-color:var(--paper-line)}
.panel--flush{padding:0;overflow:hidden}

.pill{
  display:inline-flex;align-items:center;gap:.4rem;
  padding:.3rem .78rem;border-radius:999px;
  font-size:.72rem;letter-spacing:.13em;text-transform:uppercase;font-weight:600;
  border:1px solid var(--ink-line-cyan);color:var(--c-cyan);
}
.is-paper .pill,.panel--paper .pill,.panel--cream .pill{border-color:rgba(14,111,104,.35);color:var(--c-teal)}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:.5rem;
  padding:.82rem 1.4rem;border-radius:999px;
  font-size:.94rem;font-weight:700;letter-spacing:.02em;
  border:1px solid transparent;cursor:pointer;
  transition:transform .2s ease,background-color .2s ease,color .2s ease,border-color .2s ease;
}
.btn:hover{transform:translateY(-1px)}
.btn--gold{background:var(--c-amber);color:var(--c-ink)}
.btn--gold:hover{background:#ffca6e}
.btn--cyan{background:var(--c-cyan);color:var(--c-ink)}
.btn--cyan:hover{background:#63ebdd}
.btn--ghost{background:transparent;border-color:var(--ink-line-cyan);color:var(--c-cream)}
.btn--ghost:hover{border-color:var(--c-cyan);color:var(--c-cyan)}
.btn--ink{background:var(--c-ink);color:var(--c-cream)}
.btn--ink:hover{background:var(--c-ink-panel)}

/* ---------- 面包屑 ---------- */
.breadcrumb{font-size:.78rem;letter-spacing:.1em;text-transform:uppercase;color:var(--c-slate);margin-bottom:1.1rem}
.breadcrumb-list{display:flex;flex-wrap:wrap;align-items:center;gap:.5rem}
.breadcrumb-item{display:inline-flex;align-items:center;gap:.5rem}
.breadcrumb-item+.breadcrumb-item::before{content:"/";opacity:.55;color:currentColor}
.breadcrumb-link{color:inherit;transition:color .18s ease}
.breadcrumb-link:hover{color:var(--c-cyan)}
.is-paper .breadcrumb-link:hover{color:var(--c-teal)}

/* ---------- 媒体容器 ---------- */
.media-frame{
  position:relative;width:100%;overflow:hidden;isolation:isolate;
  aspect-ratio:16/10;border-radius:22px;
  border:1px solid var(--ink-line);
  background:
    linear-gradient(135deg,rgba(53,224,208,.18),rgba(242,181,68,.10) 56%,rgba(11,27,43,.55)),
    var(--c-ink-panel);
}
.media-frame::after{
  content:"";position:absolute;inset:0;pointer-events:none;z-index:0;
  background-image:
    linear-gradient(to right,rgba(143,163,184,.18) 1px,transparent 1px),
    linear-gradient(to bottom,rgba(143,163,184,.18) 1px,transparent 1px);
  background-size:48px 48px;
  opacity:.75;
}
.media-frame>img,.media-frame>svg{position:relative;z-index:1;width:100%;height:100%;object-fit:cover}
.media-frame--wide{aspect-ratio:21/9}
.media-frame--square{aspect-ratio:1/1}
.media-frame--tall{aspect-ratio:4/5}
.is-paper .media-frame,.panel--paper .media-frame,.panel--cream .media-frame{
  border-color:var(--paper-line);
  background:linear-gradient(135deg,rgba(14,111,104,.16),rgba(242,181,68,.14) 58%,rgba(215,232,228,.9)),var(--c-mist);
}

/* ---------- 滚动显现 ---------- */
html.js [data-reveal]{opacity:0;transform:translateY(18px);transition:opacity .5s ease,transform .5s ease}
html.js [data-reveal].is-revealed{opacity:1;transform:none}

/* ---------- 跳转链接与进度条 ---------- */
.skip-link{
  position:fixed;top:10px;left:50%;z-index:200;
  transform:translate(-50%,-220%);
  padding:10px 20px;border-radius:999px;
  background:var(--c-amber);color:var(--c-ink);
  font-size:.86rem;font-weight:700;letter-spacing:.04em;
  transition:transform .2s ease;
}
.skip-link:focus,.skip-link:focus-visible{transform:translate(-50%,0)}
.scroll-progress{position:fixed;top:0;left:0;right:0;height:3px;z-index:120;pointer-events:none}
.scroll-progress-bar{
  display:block;height:100%;width:100%;
  transform:scaleX(0);transform-origin:0 50%;
  background:linear-gradient(90deg,var(--c-cyan),var(--c-amber));
  transition:transform .14s linear;
}

/* ---------- 头部 ---------- */
.site-header{position:fixed;top:0;left:0;right:0;z-index:100;padding:12px clamp(.75rem,2.5vw,1.5rem);pointer-events:none}
.header-shell{
  position:relative;
  pointer-events:auto;
  max-width:1240px;margin-inline:auto;
  display:flex;align-items:center;gap:14px;
  padding:9px 12px 9px 16px;
  border-radius:999px;
  background:rgba(18,41,63,.92);
  border:1px solid var(--ink-line);
  box-shadow:0 20px 44px -28px rgba(0,0,0,.95),inset 0 1px 0 rgba(255,255,255,.05);
  backdrop-filter:blur(16px);
  -webkit-backdrop-filter:blur(16px);
  transition:padding .25s ease,background-color .25s ease,border-color .25s ease;
}
.site-header.is-condensed .header-shell{padding-block:5px;background:rgba(11,27,43,.97);border-color:rgba(53,224,208,.22)}

.brand{display:inline-flex;align-items:center;gap:10px;flex:0 0 auto;color:var(--c-cream)}
.brand-mark{
  display:grid;place-items:center;flex:0 0 auto;
  width:34px;height:34px;border-radius:11px;
  background:linear-gradient(135deg,var(--c-cyan),var(--c-amber));
  color:var(--c-ink);
}
.brand-mark svg{width:18px;height:18px}
.brand-text{display:flex;flex-direction:column;line-height:1}
.brand-name{font-size:.98rem;font-weight:800;letter-spacing:.07em}
.brand-sub{margin-top:4px;font-size:.58rem;letter-spacing:.28em;text-transform:uppercase;color:var(--c-slate)}

.primary-nav{flex:1 1 auto;display:flex;justify-content:center;min-width:0}
.nav-list{display:flex;align-items:center;gap:2px;list-style:none;margin:0;padding:0}
.nav-link{
  display:inline-block;padding:8px 12px;border-radius:999px;
  font-size:.86rem;font-weight:600;letter-spacing:.04em;color:#cfdae4;
  transition:color .18s ease,background-color .18s ease;
  white-space:nowrap;
}
.nav-link:hover{color:#fff;background:rgba(53,224,208,.12)}
.nav-link[aria-current="page"]{background:var(--c-cyan);color:var(--c-ink);font-weight:700}

.header-tools{display:flex;align-items:center;gap:8px;flex:0 0 auto}
.search-link{
  display:inline-flex;align-items:center;gap:8px;
  padding:8px 14px;border-radius:999px;
  border:1px solid rgba(143,163,184,.32);
  color:#c3d1dd;font-size:.82rem;letter-spacing:.04em;
  transition:border-color .18s ease,color .18s ease,background-color .18s ease;
}
.search-link:hover{border-color:var(--c-cyan);color:var(--c-cyan);background:rgba(53,224,208,.08)}
.search-icon{width:14px;height:14px;flex:0 0 auto}
.header-cta{
  display:inline-flex;align-items:center;justify-content:center;
  padding:8px 15px;border-radius:999px;
  font-size:.82rem;font-weight:700;letter-spacing:.03em;white-space:nowrap;
  border:1px solid var(--ink-line-cyan);color:var(--c-cyan);background:transparent;
  transition:background-color .18s ease,color .18s ease,border-color .18s ease,transform .18s ease;
}
.header-cta:hover{background:rgba(53,224,208,.14);transform:translateY(-1px)}
.header-cta--gold{background:var(--c-amber);border-color:var(--c-amber);color:var(--c-ink)}
.header-cta--gold:hover{background:#ffca6e;border-color:#ffca6e;color:var(--c-ink)}

.nav-toggle{
  display:none;align-items:center;gap:8px;
  padding:8px 12px;border-radius:999px;
  border:1px solid rgba(143,163,184,.32);
  color:#cfdae4;cursor:pointer;
  transition:border-color .18s ease,color .18s ease;
}
.nav-toggle:hover{border-color:var(--c-cyan);color:var(--c-cyan)}
.nav-toggle-bars{display:inline-flex;flex-direction:column;gap:3px;width:16px}
.nav-toggle-bar{display:block;height:2px;width:100%;border-radius:2px;background:currentColor;transition:transform .2s ease,opacity .2s ease}
.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(1){transform:translateY(5px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(3){transform:translateY(-5px) rotate(-45deg)}
.nav-toggle-text{font-size:.8rem;font-weight:700;letter-spacing:.08em}

@media (max-width:1080px){
  .search-link-text{display:none}
  .search-link{padding:8px 10px}
}
@media (max-width:900px){
  :root{--header-gap:88px}
  .nav-toggle{display:inline-flex}
  .primary-nav{
    position:absolute;top:calc(100% + 10px);left:0;right:0;
    display:none;flex-direction:column;justify-content:flex-start;
    padding:10px;
    background:rgba(11,27,43,.99);
    border:1px solid var(--ink-line);
    border-radius:22px;
    box-shadow:0 30px 64px -32px #000;
    max-height:min(70vh,520px);overflow-y:auto;
  }
  .primary-nav[data-open="true"]{display:block}
  .nav-list{flex-direction:column;align-items:stretch;gap:2px;width:100%}
  .nav-link{display:block;padding:12px 14px;border-radius:14px;font-size:.95rem}
  .header-tools{margin-left:auto}
}
@media (max-width:600px){
  :root{--header-gap:80px}
  .brand-sub{display:none}
  .header-shell{gap:8px;padding:8px 10px}
  .header-cta:not(.header-cta--gold){display:none}
  .search-link{display:none}
  .header-cta--gold{padding:8px 12px;font-size:.78rem}
  .nav-toggle{padding:8px 10px}
}

/* ---------- 页脚 ---------- */
.site-footer{
  position:relative;overflow:hidden;
  background:var(--c-ink);color:var(--c-cream);
  border-top:1px solid var(--ink-line-soft);
  padding:clamp(2.5rem,5vw,4rem) 0 1.6rem;
}
.site-footer::before{
  content:"";position:absolute;inset:0 0 auto;height:3px;
  background:linear-gradient(90deg,var(--c-cyan),rgba(53,224,208,0) 46%,var(--c-amber));
  opacity:.85;
}
.footer-shell{width:min(1200px,100% - 2.5rem);margin-inline:auto}
.footer-top{
  display:grid;grid-template-columns:minmax(0,.9fr) minmax(0,2.1fr);
  gap:clamp(1.5rem,4vw,3rem);align-items:start;
}
.footer-brand{max-width:330px}
.footer-brand-mark{
  display:grid;place-items:center;width:38px;height:38px;border-radius:12px;
  background:linear-gradient(135deg,var(--c-cyan),var(--c-amber));color:var(--c-ink);
}
.footer-brand-mark svg{width:20px;height:20px}
.footer-brand-name{margin-top:.9rem;font-size:1.25rem;font-weight:800;letter-spacing:.09em}
.footer-brand-text{margin-top:.6rem;font-size:.9rem;line-height:1.75;color:#a9bacb}
.footer-islands{display:grid;grid-template-columns:repeat(auto-fit,minmax(178px,1fr));gap:14px}
.footer-island{
  background:rgba(18,41,63,.74);
  border:1px solid var(--ink-line-soft);
  border-radius:var(--radius-card);
  padding:18px 18px 20px;
}
.footer-island--contact{grid-column:span 1}
.footer-heading{
  font-family:var(--font-serif);
  font-size:.76rem;font-weight:600;letter-spacing:.2em;text-transform:uppercase;
  color:var(--c-cyan);margin-bottom:.85rem;
}
.footer-list{display:grid;gap:.55rem;list-style:none;margin:0;padding:0}
.footer-link{display:inline-block;font-size:.9rem;color:#c6d4e0;transition:color .18s ease,transform .18s ease}
.footer-link:hover{color:var(--c-cyan);transform:translateX(2px)}
.footer-contact-list{gap:.62rem}
.footer-contact-item{font-size:.85rem;line-height:1.65;color:#b9c8d6;word-break:break-word}
.footer-bottom{
  margin-top:clamp(1.6rem,3vw,2.4rem);
  padding-top:1.2rem;
  border-top:1px solid var(--ink-line-soft);
  display:flex;flex-wrap:wrap;align-items:center;gap:.7rem 1.4rem;
  font-size:.8rem;color:#93a7ba;
}
.footer-copy{margin-right:auto;letter-spacing:.04em}
.footer-legal{display:flex;flex-wrap:wrap;gap:.55rem 1.1rem;list-style:none;margin:0;padding:0}
.footer-legal-link{color:#93a7ba;transition:color .18s ease}
.footer-legal-link:hover{color:var(--c-cyan)}
.footer-icp{color:#7d92a6;letter-spacing:.03em}
@media (max-width:900px){
  .footer-top{grid-template-columns:1fr}
  .footer-brand{max-width:none}
}
@media (max-width:520px){
  .footer-islands{grid-template-columns:1fr}
  .footer-bottom{flex-direction:column;align-items:flex-start}
  .footer-copy{margin-right:0}
}

/* ---------- 动效降级 ---------- */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
  }
  html.js [data-reveal]{opacity:1;transform:none}
  .btn:hover,.footer-link:hover,.header-cta:hover{transform:none}
}