*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:150px}
body,h1,h2,h3,h4,h5,h6,p,ul,ol,dl,dd,figure,blockquote{margin:0}
ul,ol{padding:0;list-style:none}
img,svg,video{display:block;max-width:100%}
a{color:var(--blue-700);text-underline-offset:3px}
button{font:inherit;color:inherit;background:none;border:0}
:focus-visible{outline:3px solid var(--orange-500);outline-offset:3px}

:root{
  --blue-900:#0B1F33;
  --blue-700:#153A5B;
  --orange-500:#F26A2E;
  --orange-300:#FFB089;
  --ink:#111418;
  --paper:#FAF6EE;
  --mist:#DCE5E6;
  --slate:#5D6B72;
  --teal:#2F7D78;
  --amber:#D9A441;
  --line:rgba(11,31,51,.16);
  --line-strong:rgba(11,31,51,.42);
  --line-light:rgba(220,229,230,.2);
  --font-display:'Source Han Sans SC Heavy','Noto Sans SC','PingFang SC',sans-serif;
  --font-body:'Source Han Sans SC','Noto Sans SC','PingFang SC',sans-serif;
  --font-mono:'JetBrains Mono','SFMono-Regular','Menlo',monospace;
  --maxw:1440px;
  --pad:clamp(18px,4vw,64px);
}

body{
  background:var(--paper);
  color:var(--ink);
  font-family:var(--font-body);
  font-size:17px;
  line-height:1.75;
  font-weight:400;
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4{font-family:var(--font-display);font-weight:900;line-height:1.12;color:var(--blue-900);letter-spacing:-.01em}
p{max-width:72ch}
::selection{background:var(--orange-300);color:var(--blue-900)}

/* ---------- 通用工具 ---------- */
.mono{font-family:var(--font-mono);font-size:12px;letter-spacing:.08em}
.eyebrow{display:flex;align-items:center;gap:10px;font-family:var(--font-mono);font-size:11px;letter-spacing:.22em;text-transform:uppercase;color:var(--orange-500)}
.eyebrow::before{content:"";display:block;width:24px;height:2px;background:var(--orange-500)}
.container{width:100%;max-width:var(--maxw);margin:0 auto;padding-left:var(--pad);padding-right:var(--pad)}
.narrow{max-width:760px}
.section{padding:clamp(40px,6vw,88px) 0}
.section--tight{padding:clamp(24px,4vw,48px) 0}
.section-head{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:16px;padding-bottom:14px;border-bottom:2px solid var(--blue-900);margin-bottom:clamp(20px,3vw,34px)}
.section-title{font-family:var(--font-display);font-size:clamp(24px,3vw,38px);font-weight:900;color:var(--blue-900);line-height:1.15}
.section-num{display:block;font-family:var(--font-mono);font-size:11px;letter-spacing:.2em;color:var(--orange-500);margin-bottom:8px}
.grid{display:grid;gap:clamp(16px,2vw,28px)}
.grid--2{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid--3{grid-template-columns:repeat(3,minmax(0,1fr))}
.grid--4{grid-template-columns:repeat(4,minmax(0,1fr))}
.grid--split{grid-template-columns:minmax(0,7fr) minmax(0,2fr) minmax(0,3fr)}
.aside-note{font-family:var(--font-mono);font-size:12px;line-height:1.75;letter-spacing:.05em;color:var(--slate);border-left:2px solid var(--orange-500);padding-left:10px;max-width:none}
.aside-note--vertical{writing-mode:vertical-rl;text-orientation:mixed;letter-spacing:.22em;border-left:0;border-top:2px solid var(--orange-500);padding:10px 0 0}

/* ---------- 跳转链接 ---------- */
.skip-link{
  position:absolute;left:14px;top:-120px;z-index:400;
  padding:10px 18px;
  background:var(--orange-500);color:var(--blue-900);
  font-family:var(--font-display);font-weight:700;font-size:14px;text-decoration:none;
  border:2px solid var(--blue-900);
  transition:top .16s ease;
}
.skip-link:focus{top:12px}

/* ---------- 页头 ---------- */
.site-header{
  position:sticky;top:0;z-index:120;
  background:var(--paper);
  border-bottom:2px solid var(--blue-900);
}
.header-meta{background:var(--blue-900);color:var(--mist)}
.header-meta-inner{
  max-width:var(--maxw);margin:0 auto;
  padding:6px var(--pad);
  display:flex;align-items:center;justify-content:space-between;gap:18px;
}
.meta-item{
  font-family:var(--font-mono);font-size:11px;letter-spacing:.18em;
  white-space:nowrap;overflow:hidden;text-overflow:ellipsis;
}
.meta-item--status{display:inline-flex;align-items:center;gap:8px;color:var(--orange-300)}
.status-dot{display:inline-block;width:8px;height:8px;border-radius:50%;background:var(--teal);flex:none}
.header-meta .status-dot{background:var(--orange-300);box-shadow:0 0 0 3px rgba(255,176,137,.24)}

.masthead-wrap{
  position:relative;
  max-width:var(--maxw);margin:0 auto;
  padding:clamp(14px,2vw,24px) var(--pad) clamp(10px,1.4vw,16px);
  display:flex;justify-content:center;
}
.masthead{
  width:100%;
  display:grid;grid-template-columns:1fr auto 1fr;align-items:center;
  gap:clamp(10px,2vw,30px);
}
.masthead-note{
  font-family:var(--font-mono);font-size:11px;letter-spacing:.2em;color:var(--slate);
  text-transform:uppercase;max-width:none;
}
.masthead-note--left{justify-self:start;padding-left:10px;border-left:3px solid var(--orange-500)}
.brand{
  justify-self:center;
  display:flex;flex-direction:column;align-items:center;gap:6px;
  text-decoration:none;color:var(--blue-900);
  padding-bottom:6px;border-bottom:3px solid var(--orange-500);
}
.brand-cn{
  font-family:var(--font-display);font-weight:900;
  font-size:clamp(26px,3.6vw,44px);line-height:1;letter-spacing:.02em;
  color:var(--blue-900);transition:color .16s ease;
}
.brand-en{font-family:var(--font-mono);font-size:10px;letter-spacing:.38em;color:var(--slate)}
.brand:hover .brand-cn{color:var(--blue-700)}

.quick-links{justify-self:end;display:flex;align-items:center;gap:8px;flex-wrap:wrap}
.quick-link{
  display:inline-block;
  padding:7px 12px;
  font-family:var(--font-display);font-size:12px;font-weight:700;letter-spacing:.06em;
  text-decoration:none;color:var(--blue-900);
  border:2px solid var(--blue-900);background:transparent;
  transition:background .16s ease,color .16s ease,border-color .16s ease;
}
.quick-link:hover{background:var(--blue-900);color:var(--paper)}
.quick-link--accent{background:var(--orange-500);border-color:var(--orange-500);color:var(--blue-900)}
.quick-link--accent:hover{background:var(--blue-900);border-color:var(--blue-900);color:var(--paper)}

.nav-toggle{
  display:none;position:absolute;right:var(--pad);top:14px;z-index:2;
  align-items:center;gap:9px;
  padding:9px 13px;
  background:var(--blue-900);color:var(--paper);cursor:pointer;
  font-family:var(--font-mono);font-size:11px;letter-spacing:.16em;
}
.nav-toggle-bars{display:inline-flex;flex-direction:column;gap:4px;width:16px}
.nav-toggle-bars span{display:block;height:2px;background:var(--paper);transition:transform .2s ease}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars span:first-child{transform:translateY(3px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars span:last-child{transform:translateY(-3px) rotate(-45deg)}

.primary-nav{
  max-width:var(--maxw);margin:0 auto;
  padding:0 var(--pad);
  display:flex;align-items:center;justify-content:space-between;gap:20px;
  border-top:1px solid var(--line);
}
.nav-list{display:flex;flex-wrap:wrap;align-items:center;gap:clamp(4px,1.8vw,28px);counter-reset:navitem}
.nav-item{counter-increment:navitem}
.nav-link{
  position:relative;
  display:inline-flex;align-items:baseline;gap:6px;
  padding:14px 2px;
  font-family:var(--font-display);font-size:15px;font-weight:700;
  color:var(--blue-900);text-decoration:none;
}
.nav-link::before{
  content:counter(navitem,decimal-leading-zero);
  font-family:var(--font-mono);font-size:10px;font-weight:400;letter-spacing:.06em;
  color:var(--slate);
}
.nav-link::after{
  content:"";position:absolute;left:0;right:0;bottom:8px;height:3px;
  background:var(--orange-500);
  transform:scaleX(0);transform-origin:left;
  transition:transform .18s ease;
}
.nav-link:hover{color:var(--blue-700)}
.nav-link:hover::after,.nav-link:focus-visible::after{transform:scaleX(1)}
.nav-link[aria-current="page"]{color:var(--blue-900)}
.nav-link[aria-current="page"]::after{transform:scaleX(1)}
.nav-link[aria-current="page"]::before{color:var(--orange-500)}
.nav-aside{
  font-family:var(--font-mono);font-size:11px;letter-spacing:.2em;
  color:var(--slate);white-space:nowrap;max-width:none;
}
.scroll-progress{height:3px;background:rgba(11,31,51,.1);overflow:hidden}
.scroll-progress-bar{display:block;width:0;height:100%;background:var(--orange-500)}

/* ---------- 页脚 ---------- */
.site-footer{margin-top:clamp(48px,7vw,96px);background:var(--blue-900);color:var(--mist)}
.footer-stripe{display:flex;height:8px}
.footer-stripe span:nth-child(1){background:var(--orange-500);flex:2}
.footer-stripe span:nth-child(2){background:var(--blue-700);flex:1}
.footer-stripe span:nth-child(3){background:var(--teal);flex:.6}
.footer-stripe span:nth-child(4){background:var(--mist);flex:.5}
.footer-inner{
  max-width:var(--maxw);margin:0 auto;
  padding:clamp(32px,5vw,64px) var(--pad) clamp(24px,3vw,36px);
  display:grid;grid-template-columns:1.5fr 1fr 1.25fr 1fr;
  gap:clamp(24px,3.4vw,56px);
}
.footer-brand-link{
  display:inline-block;
  font-family:var(--font-display);font-size:clamp(24px,2.6vw,32px);font-weight:900;letter-spacing:.02em;
  color:var(--paper);text-decoration:none;
  padding-bottom:4px;border-bottom:3px solid var(--orange-500);
  transition:color .16s ease;
}
.footer-brand-link:hover{color:var(--orange-300)}
.footer-desc{margin-top:14px;font-size:14px;line-height:1.8;color:var(--mist);max-width:34ch}
.footer-icp{
  margin-top:16px;
  font-family:var(--font-mono);font-size:11px;letter-spacing:.12em;
  color:rgba(220,229,230,.6);
}
.footer-title{
  margin-bottom:14px;
  font-family:var(--font-mono);font-size:11px;font-weight:400;letter-spacing:.22em;
  color:var(--orange-300);text-transform:uppercase;
}
.footer-list{display:flex;flex-direction:column;gap:9px;font-size:14px}
.footer-list a{
  color:var(--mist);text-decoration:none;
  padding-bottom:2px;border-bottom:1px solid transparent;
  transition:color .16s ease,border-color .16s ease;
}
.footer-list a:hover{color:var(--paper);border-bottom-color:var(--orange-500)}
.footer-list--contact{gap:12px}
.footer-contact-item{display:flex;flex-direction:column;gap:2px}
.footer-label{
  font-family:var(--font-mono);font-size:10px;letter-spacing:.16em;
  color:rgba(220,229,230,.55);
}
.footer-value{font-size:14px;line-height:1.6;color:var(--paper);word-break:break-word}
.footer-legal{
  max-width:var(--maxw);margin:0 auto;
  padding:16px var(--pad) 28px;
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:8px 24px;
  border-top:1px solid var(--line-light);
}
.footer-copy{
  font-family:var(--font-mono);font-size:11px;letter-spacing:.1em;
  color:rgba(220,229,230,.62);max-width:none;
}

/* ---------- 组件 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:10px;
  padding:13px 22px;
  font-family:var(--font-display);font-size:15px;font-weight:700;letter-spacing:.02em;
  text-decoration:none;color:var(--blue-900);
  background:var(--paper);border:2px solid var(--blue-900);
  cursor:pointer;
  transition:background .16s ease,color .16s ease,border-color .16s ease,transform .16s ease;
}
.btn:hover{background:var(--blue-900);color:var(--paper)}
.btn:active{transform:translateY(1px)}
.btn--primary{background:var(--orange-500);border-color:var(--orange-500);color:var(--blue-900)}
.btn--primary:hover{background:var(--blue-900);border-color:var(--blue-900);color:var(--paper)}
.btn--dark{background:var(--blue-900);border-color:var(--blue-900);color:var(--paper)}
.btn--dark:hover{background:var(--orange-500);border-color:var(--orange-500);color:var(--blue-900)}
.btn--ghost{background:transparent}
.btn--sm{padding:8px 14px;font-size:13px}

.breadcrumbs{max-width:var(--maxw);margin:0 auto;padding:20px var(--pad) 0}
.breadcrumb-list{
  display:flex;flex-wrap:wrap;align-items:center;
  font-family:var(--font-mono);font-size:11px;letter-spacing:.1em;color:var(--slate);
}
.breadcrumb-list li{display:inline-flex;align-items:center}
.breadcrumb-list li:not(:last-child)::after{content:"/";margin:0 10px;color:var(--line-strong)}
.breadcrumb-list a{color:var(--slate);text-decoration:none}
.breadcrumb-list a:hover{color:var(--orange-500)}
.breadcrumb-list [aria-current="page"]{color:var(--blue-900)}

.paper-card{
  background:var(--paper);
  border:2px solid var(--blue-900);
  padding:clamp(18px,2.4vw,28px);
  box-shadow:6px 6px 0 0 var(--mist),6px 6px 0 2px rgba(11,31,51,.92);
}
.tag{
  display:inline-flex;align-items:center;gap:6px;
  padding:3px 9px;
  font-family:var(--font-mono);font-size:11px;letter-spacing:.08em;
  color:var(--blue-700);background:var(--paper);
  border:1px solid var(--line-strong);
}
.tag--accent{background:var(--orange-300);border-color:var(--orange-500);color:var(--blue-900)}
.tag--dark{background:var(--blue-900);border-color:var(--blue-900);color:var(--paper)}
.tag--ok{border-color:var(--teal);color:var(--teal)}
.compare-bar{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:10px 18px;
  padding:12px clamp(14px,2vw,22px);
  background:var(--blue-900);color:var(--paper);
  border-left:6px solid var(--orange-500);
  font-family:var(--font-mono);font-size:12px;letter-spacing:.08em;
}
.compare-bar strong{color:var(--orange-300);font-weight:400}
.index-list{border-bottom:1px solid var(--line)}
.index-list li{border-top:1px solid var(--line)}
.index-list a{
  display:flex;align-items:baseline;justify-content:space-between;gap:14px;
  padding:12px 0;text-decoration:none;color:var(--blue-900);
}
.index-list a:hover{color:var(--orange-500)}
.index-list .idx{font-family:var(--font-mono);font-size:11px;color:var(--slate)}
.status{
  display:inline-flex;align-items:center;gap:7px;
  font-family:var(--font-mono);font-size:11px;letter-spacing:.1em;color:var(--slate);
}
.status--warn .status-dot{background:var(--amber)}

.figure{margin:0;display:flex;flex-direction:column;gap:8px}
.figure-media{
  position:relative;
  width:100%;
  aspect-ratio:16/10;
  background:linear-gradient(135deg,rgba(220,229,230,.14),rgba(11,31,51,.96)),var(--blue-900);
  border:2px solid var(--blue-900);
  overflow:hidden;
}
.figure-media img{width:100%;height:100%;object-fit:cover}
.figure-media--wide{aspect-ratio:21/9}
.figure-media--tall{aspect-ratio:4/5}
.figure-media--square{aspect-ratio:1/1}
.figure-caption{
  display:flex;align-items:baseline;gap:10px;
  font-family:var(--font-mono);font-size:11px;letter-spacing:.08em;color:var(--slate);
  max-width:none;
}
.figure-caption .cap-num{color:var(--orange-500)}

.filter-bar{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:clamp(16px,2.4vw,26px)}
.filter-btn{
  padding:7px 13px;
  font-family:var(--font-mono);font-size:12px;letter-spacing:.08em;
  color:var(--blue-900);background:transparent;
  border:2px solid var(--line-strong);
  cursor:pointer;
  transition:background .16s ease,color .16s ease,border-color .16s ease;
}
.filter-btn:hover{border-color:var(--orange-500)}
.filter-btn[aria-pressed="true"],.filter-btn.is-active{
  background:var(--orange-500);border-color:var(--orange-500);
  color:var(--blue-900);font-weight:700;
}
[data-filter-item][hidden]{display:none !important}

html.has-js [data-reveal]{opacity:0;transform:translateY(16px);transition:opacity .5s ease,transform .5s ease}
html.has-js [data-reveal].is-visible{opacity:1;transform:none}

.site-footer :focus-visible{outline-color:var(--orange-300)}

/* ---------- 响应式 ---------- */
@media (max-width:1100px){
  .nav-aside{display:none}
  .nav-list{gap:clamp(4px,2vw,18px)}
  .footer-inner{grid-template-columns:1fr 1fr;gap:32px}
}
@media (max-width:900px){
  .masthead{grid-template-columns:1fr;justify-items:center;gap:12px}
  .masthead-note--left{display:none}
  .quick-links{justify-self:center}
  .nav-toggle{display:inline-flex}
  .primary-nav{
    flex-direction:column;align-items:stretch;
    max-height:0;overflow:hidden;
    padding-top:0;padding-bottom:0;
    border-top:0;
    transition:max-height .28s ease,padding .28s ease;
  }
  .primary-nav[data-open="true"]{
    max-height:620px;
    padding-top:6px;padding-bottom:16px;
    border-top:1px solid var(--line);
  }
  .nav-list{flex-direction:column;align-items:stretch;gap:0;width:100%}
  .nav-link{display:flex;width:100%;padding:12px 0;font-size:16px;border-bottom:1px solid rgba(11,31,51,.09)}
  .nav-link::after{display:none}
  .nav-link[aria-current="page"]{color:var(--orange-500)}
  .grid--split{grid-template-columns:1fr}
  .grid--3,.grid--4{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (max-width:720px){
  body{font-size:16px}
  .header-meta-inner{font-size:10px;letter-spacing:.12em;gap:10px}
  .meta-item:nth-child(2){display:none}
  .grid--2,.grid--3,.grid--4{grid-template-columns:1fr}
  .footer-inner{grid-template-columns:1fr;gap:28px}
  .footer-legal{flex-direction:column;align-items:flex-start}
  .brand-cn{font-size:28px}
  .paper-card{box-shadow:5px 5px 0 0 var(--mist),5px 5px 0 2px rgba(11,31,51,.92)}
}
@media (max-width:400px){
  .brand-en{letter-spacing:.24em;font-size:9px}
  .quick-link{padding:6px 10px;font-size:11px}
}
@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.has-js [data-reveal]{opacity:1 !important;transform:none !important}
}
@media print{
  .site-header,.footer-stripe{position:static}
  .scroll-progress,.nav-toggle,.skip-link{display:none !important}
}