/* ========== 01 reset ========== */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:140px}
body,h1,h2,h3,h4,h5,h6,p,figure,blockquote,dl,dd,ul,ol{margin:0}
ul,ol{padding:0;list-style:none}
button{font:inherit;color:inherit;background:none;border:0;padding:0}
a{color:inherit;text-decoration:none}
img,svg,video{display:block;max-width:100%;height:auto}
table{border-collapse:collapse;width:100%}

/* ========== 02 tokens ========== */
:root{
  --sea:#0B2A4A;
  --ink:#101418;
  --orange:#FF5C00;
  --orange-deep:#D94B00;
  --amber:#FFB000;
  --mist:#C7D0D9;
  --rice:#F6F1E7;
  --slate:#5E7387;
  --pale:#E8EEF2;
  --ice:#9FC3D9;
  --green:#1F8A70;

  --line:rgba(16,20,24,.14);
  --line-strong:rgba(16,20,24,.34);
  --line-light:rgba(159,195,217,.26);

  --font-display:Georgia,"Songti SC","Noto Serif SC","Times New Roman",serif;
  --font-sans:"Helvetica Neue","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --font-mono:ui-monospace,SFMono-Regular,Menlo,Consolas,"Liberation Mono",monospace;

  --w-max:1240px;
  --gutter:clamp(18px,4vw,44px);
  --step:clamp(48px,7vw,92px);
}

/* ========== 03 base ========== */
body{
  background:var(--rice);
  color:var(--ink);
  font-family:var(--font-sans);
  font-size:15px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
h1,h2,h3,h4,h5,h6{font-family:var(--font-display);font-weight:700;line-height:1.18;letter-spacing:.02em;text-wrap:balance}
p,li{word-break:break-word}
::selection{background:var(--orange);color:#fff}
:focus-visible{outline:2px solid var(--orange);outline-offset:2px}
.site-footer :focus-visible{outline-color:var(--amber)}

/* ========== 04 utilities ========== */
.container{width:100%;max-width:var(--w-max);margin-inline:auto;padding-inline:var(--gutter)}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0 0 0 0);clip-path:inset(50%);white-space:nowrap;border:0}
.skip-link{
  position:absolute;left:12px;top:-64px;z-index:200;
  padding:10px 18px;background:var(--orange);color:#fff;
  font-size:13px;font-weight:700;letter-spacing:.06em;
  transition:top .16s ease;
}
.skip-link:focus{top:12px}

/* ========== 05 header ========== */
.read-progress{
  position:fixed;left:0;right:0;top:0;height:3px;z-index:110;
  background:rgba(11,42,74,.12);pointer-events:none;
}
.read-progress-bar{display:block;height:100%;width:0;background:var(--orange);transition:width .1s linear}

.site-header{
  position:sticky;top:0;z-index:90;
  background:var(--rice);
  border-bottom:1px solid var(--line-strong);
}

.hdr-rail{background:var(--sea);color:var(--pale);border-bottom:1px solid var(--line-light)}
.rail-inner{
  display:flex;align-items:center;justify-content:space-between;
  gap:14px 20px;flex-wrap:wrap;min-height:44px;padding-block:6px;
}
.rail-status{
  display:inline-flex;align-items:center;gap:9px;
  font-family:var(--font-mono);font-size:11px;letter-spacing:.16em;
  text-transform:uppercase;color:var(--rice);
}
.rail-dot{width:7px;height:7px;background:var(--green);box-shadow:0 0 0 1px rgba(31,138,112,.45)}
.rail-note{
  font-size:11.5px;letter-spacing:.12em;color:var(--ice);
  font-family:var(--font-sans);
}
.rail-actions{display:flex;align-items:center;gap:10px;flex-wrap:wrap}
.rail-link{
  font-size:12px;letter-spacing:.1em;color:var(--ice);
  padding:5px 2px;border-bottom:1px solid transparent;
  transition:color .12s ease,border-color .12s ease;
}
.rail-link:hover{color:#fff;border-bottom-color:var(--orange)}
.rail-actions .btn{padding:8px 14px;font-size:11.5px;letter-spacing:.14em}

.hdr-main{background:var(--rice);position:relative}
.hdr-inner{
  display:flex;align-items:center;justify-content:space-between;
  gap:18px;padding-block:14px;
}

.brand{display:inline-flex;align-items:center;gap:12px;color:var(--ink)}
.brand-mark{
  display:inline-flex;align-items:center;justify-content:center;
  min-width:48px;height:46px;padding:0 7px;
  background:var(--sea);color:var(--rice);
  font-family:var(--font-mono);font-size:13px;font-weight:600;letter-spacing:.1em;
  border-bottom:3px solid var(--orange);
  transition:background-color .12s ease;
}
.brand:hover .brand-mark{background:var(--orange)}
.brand-text{display:flex;flex-direction:column;gap:2px}
.brand-name{font-family:var(--font-display);font-size:19px;font-weight:700;letter-spacing:.08em;line-height:1.1}
.brand-cn{font-family:var(--font-mono);font-size:10px;letter-spacing:.18em;text-transform:uppercase;color:var(--slate)}

.nav-toggle{
  display:none;flex-direction:column;align-items:center;justify-content:center;gap:6px;
  width:46px;height:42px;border:1px solid var(--line-strong);background:transparent;
  cursor:pointer;flex:none;
}
.nav-toggle-bar{display:block;width:18px;height:2px;background:var(--ink);transition:transform .12s ease,background-color .12s ease}
.nav-toggle[aria-expanded="true"] .nav-toggle-bar:first-child{transform:translateY(4px) rotate(45deg);background:var(--orange)}
.nav-toggle[aria-expanded="true"] .nav-toggle-bar:last-child{transform:translateY(-4px) rotate(-45deg);background:var(--orange)}

.hdr-nav{display:flex;align-items:center}
.hdr-nav-list{display:flex;align-items:center;gap:2px}
.hdr-nav-item{margin:0}
.hdr-nav-link{
  display:inline-flex;align-items:baseline;gap:6px;
  padding:10px 10px 9px;border-top:2px solid transparent;
  font-size:13px;letter-spacing:.02em;line-height:1.3;color:var(--ink);
  transition:color .12s ease,border-color .12s ease,background-color .12s ease;
}
.hdr-nav-link:hover{color:var(--orange);border-top-color:var(--ice);background:rgba(232,238,242,.75)}
.hdr-nav-link[aria-current="page"]{color:var(--sea);font-weight:700;border-top-color:var(--orange)}
.hdr-nav-link[aria-current="page"] .nav-index{color:var(--orange)}
.nav-index{font-family:var(--font-mono);font-size:10px;font-weight:400;letter-spacing:.08em;color:var(--slate)}
.hdr-nav[data-open="true"]{display:flex}

/* ========== 06 footer ========== */
.site-footer{
  background:var(--sea);color:var(--pale);
  border-top:3px solid var(--orange);
  margin-top:clamp(56px,9vw,110px);
}
.ft-tick{
  height:9px;
  background-image:repeating-linear-gradient(90deg,rgba(159,195,217,.55) 0 1px,transparent 1px 12px);
  border-bottom:1px solid var(--line-light);
}
.ft-inner{
  display:grid;
  grid-template-columns:1.5fr 1fr 1fr 1.3fr;
  gap:clamp(24px,4vw,52px);
  padding-block:clamp(36px,6vw,64px);
}
.ft-brand{min-width:0}
.ft-brand-name{
  font-family:var(--font-display);font-size:clamp(20px,2.4vw,26px);
  font-weight:700;letter-spacing:.08em;line-height:1.2;color:var(--rice);
}
.ft-brand-sub{margin-top:10px;max-width:28em;font-size:12.5px;line-height:1.75;color:var(--ice)}
.ft-stamp{
  display:inline-flex;align-items:center;gap:8px;margin-top:16px;
  padding:6px 10px;border:1px solid var(--line-light);
  font-family:var(--font-mono);font-size:11px;letter-spacing:.12em;color:var(--rice);
}
.ft-stamp-dot{width:6px;height:6px;background:var(--green)}
.ft-note{margin-top:16px;max-width:32em;font-size:12px;line-height:1.75;color:rgba(199,208,217,.82)}
.ft-col{min-width:0}
.ft-heading{
  font-family:var(--font-sans);font-size:11px;font-weight:700;
  letter-spacing:.2em;color:var(--ice);
  padding-bottom:10px;margin-bottom:14px;
  border-bottom:1px solid var(--line-light);
}
.ft-list{display:flex;flex-direction:column;gap:2px}
.ft-link{
  display:inline-block;padding:4px 0;font-size:13.5px;color:var(--pale);
  border-bottom:1px solid transparent;
  transition:color .12s ease,border-color .12s ease;
}
.ft-link:hover{color:var(--amber);border-bottom-color:var(--amber)}
.ft-list--contact{gap:12px}
.ft-contact-row{display:flex;flex-direction:column;gap:3px}
.ft-contact-key{font-family:var(--font-mono);font-size:10.5px;letter-spacing:.16em;color:rgba(159,195,217,.9)}
.ft-contact-val{font-family:var(--font-mono);font-size:12.5px;line-height:1.65;color:var(--pale);word-break:break-word}
.ft-legal{border-top:1px solid var(--line-light);background:rgba(0,0,0,.18)}
.ft-legal-inner{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;
  gap:10px 20px;padding-block:16px;
}
.ft-copy{font-family:var(--font-mono);font-size:11.5px;letter-spacing:.06em;color:rgba(199,208,217,.78)}
.ft-legal-links{display:flex;flex-wrap:wrap;align-items:center;gap:6px 18px}
.ft-legal-link{
  font-size:12px;color:var(--pale);
  border-bottom:1px solid rgba(159,195,217,.45);padding-bottom:1px;
  transition:color .12s ease,border-color .12s ease;
}
.ft-legal-link:hover{color:var(--amber);border-bottom-color:var(--amber)}

/* ========== 07 buttons & tags ========== */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 20px;border:1px solid transparent;border-radius:0;
  font-family:var(--font-sans);font-size:12.5px;font-weight:700;letter-spacing:.1em;
  line-height:1.2;cursor:pointer;
  transition:background-color .12s ease,color .12s ease,border-color .12s ease,transform .12s ease;
}
.btn--primary{background:var(--orange);color:#fff;border-color:var(--orange)}
.btn--primary:hover{background:var(--orange-deep);border-color:var(--orange-deep)}
.btn--ghost{background:transparent;color:var(--sea);border-color:var(--line-strong)}
.btn--ghost:hover{background:var(--sea);color:var(--rice);border-color:var(--sea)}
.btn--quiet{background:var(--pale);color:var(--sea);border-color:transparent}
.btn--quiet:hover{background:var(--ice);color:var(--sea)}

.tag{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 9px;border:1px solid var(--line-strong);
  font-family:var(--font-mono);font-size:11px;letter-spacing:.12em;
  text-transform:uppercase;color:var(--sea);background:transparent;
}
.tag--fee{background:var(--amber);border-color:var(--amber);color:#2A1B00;font-weight:600}
.tag--update{background:var(--green);border-color:var(--green);color:#fff}
.tag--muted{color:var(--slate);border-color:var(--mist)}

/* ========== 08 layout components ========== */
.section{padding-block:var(--step);border-bottom:1px solid var(--line)}
.section--tint{background:var(--pale)}
.section--sea{background:var(--sea);color:var(--pale);border-bottom-color:rgba(159,195,217,.22)}
.section--lined{
  background-image:repeating-linear-gradient(90deg,rgba(11,42,74,.055) 0 1px,transparent 1px 80px);
}
.section--sea .eyebrow{color:var(--ice)}
.section--sea .headline,.section--sea .display{color:var(--rice)}
.section--sea .lede{color:rgba(232,238,242,.86)}

.section-head{display:flex;flex-direction:column;gap:12px;margin-bottom:clamp(24px,4vw,40px)}
.eyebrow{
  display:inline-flex;align-items:center;gap:10px;
  font-family:var(--font-mono);font-size:11px;letter-spacing:.2em;
  text-transform:uppercase;color:var(--slate);
}
.eyebrow::before{content:"";width:26px;height:2px;background:var(--orange);flex:none}
.display{
  font-family:var(--font-display);font-weight:700;
  font-size:clamp(2.8rem,7vw,6rem);line-height:1.02;letter-spacing:.01em;
}
.headline{font-size:clamp(1.6rem,3vw,2.6rem);line-height:1.16}
.lede{max-width:60ch;font-size:clamp(15px,1.5vw,17px);line-height:1.8;color:rgba(16,20,24,.78)}

.prose{max-width:66ch;font-size:15px;line-height:1.8;color:rgba(16,20,24,.88)}
.prose p+p{margin-top:1em}
.prose h2{font-size:clamp(1.4rem,2.4vw,1.9rem);margin-top:1.8em;margin-bottom:.6em}
.prose h3{font-size:1.15rem;margin-top:1.6em;margin-bottom:.5em}
.prose ul,.prose ol{margin-top:.8em;padding-left:1.25em;list-style:disc}
.prose ol{list-style:decimal}
.prose li+li{margin-top:.35em}
.prose a{color:var(--orange-deep);border-bottom:1px solid currentColor}
.prose a:hover{color:var(--orange)}
.prose strong{font-weight:700}

.rule-tick{
  height:10px;
  border-bottom:1px solid var(--line);
  background-image:repeating-linear-gradient(90deg,var(--mist) 0 1px,transparent 1px 10px);
  background-repeat:repeat-x;background-position:bottom left;background-size:10px 7px;
}

.grid{display:grid;gap:clamp(16px,2.4vw,28px)}
.grid--2{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid--3{grid-template-columns:repeat(3,minmax(0,1fr))}
.grid--split{grid-template-columns:minmax(0,.85fr) minmax(0,1.65fr)}

.card{
  background:#fff;border:1px solid var(--line);border-top:3px solid var(--sea);
  padding:clamp(18px,2.6vw,28px);
}
.panel{background:var(--pale);border:1px solid var(--line);padding:clamp(18px,2.6vw,28px)}
.board{
  position:relative;background:var(--sea);color:var(--pale);
  border:1px solid var(--line-light);
  padding:clamp(20px,3vw,32px);
  background-image:linear-gradient(90deg,rgba(159,195,217,.14) 1px,transparent 1px);
  background-size:56px 100%;
}
.board .headline,.board h2,.board h3{color:var(--rice)}

/* ========== 09 data components ========== */
.stat{display:flex;flex-direction:column;gap:4px}
.stat-value{
  font-family:var(--font-mono);font-weight:600;letter-spacing:-.01em;
  font-size:clamp(1.4rem,2.4vw,2.2rem);line-height:1.1;color:var(--sea);
  transition:color .22s ease,letter-spacing .22s ease;
}
.board .stat-value{color:var(--amber)}
.stat-value.is-flash{color:var(--orange);letter-spacing:.02em}
.board .stat-value.is-flash{color:#FFD37A}
.stat-label{
  font-family:var(--font-mono);font-size:11px;letter-spacing:.16em;
  text-transform:uppercase;color:var(--slate);
}
.board .stat-label{color:var(--ice)}

.meter{display:flex;flex-direction:column;gap:6px}
.meter-track{position:relative;height:6px;background:var(--pale);border:1px solid var(--line);overflow:hidden}
.meter-fill{display:block;height:100%;width:var(--meter,50%);background:var(--sea)}
.board .meter-track{background:rgba(232,238,242,.16);border-color:rgba(159,195,217,.35)}
.board .meter-fill{background:var(--amber)}
.meter-label{
  display:flex;align-items:baseline;justify-content:space-between;gap:12px;
  font-family:var(--font-mono);font-size:11px;letter-spacing:.1em;color:var(--slate);
}
.board .meter-label{color:var(--ice)}

.index-rail{
  display:grid;grid-template-columns:minmax(180px,.55fr) minmax(0,1.45fr);
  gap:clamp(18px,3vw,44px);align-items:start;
}
.jump-list{display:flex;flex-direction:column;border-left:1px solid var(--line)}
.jump-link{
  display:block;margin-left:-1px;padding:9px 14px;
  border-left:2px solid transparent;
  font-size:13px;letter-spacing:.02em;color:var(--slate);
  transition:color .12s ease,border-color .12s ease,background-color .12s ease;
}
.jump-link:hover{color:var(--sea);border-left-color:var(--ice);background:rgba(232,238,242,.85)}
.jump-link[data-active="true"]{color:var(--sea);font-weight:700;border-left-color:var(--orange);background:var(--pale)}

.data-table{width:100%;border-collapse:collapse;font-size:13px}
.data-table caption{
  caption-side:top;text-align:left;padding-bottom:10px;
  font-family:var(--font-mono);font-size:11px;letter-spacing:.16em;
  text-transform:uppercase;color:var(--slate);
}
.data-table th,.data-table td{padding:10px 12px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top}
.data-table thead th{
  background:var(--sea);color:var(--rice);border-bottom:0;
  font-size:11.5px;font-weight:600;letter-spacing:.12em;
}
.data-table tbody tr:nth-child(even){background:var(--pale)}
.data-table .num{font-family:var(--font-mono);text-align:right;white-space:nowrap}

.breadcrumb{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  padding-block:16px;
  font-family:var(--font-mono);font-size:11.5px;letter-spacing:.1em;color:var(--slate);
}
.breadcrumb-link{color:var(--slate);border-bottom:1px solid transparent;transition:color .12s ease,border-color .12s ease}
.breadcrumb-link:hover{color:var(--orange-deep);border-bottom-color:var(--orange)}
.breadcrumb-sep{color:var(--mist)}

/* ========== 10 media frames ========== */
.img-frame{
  position:relative;overflow:hidden;aspect-ratio:16/9;
  background-color:var(--pale);border:1px solid var(--line);
  background-image:
    linear-gradient(90deg,rgba(11,42,74,.07) 1px,transparent 1px),
    linear-gradient(0deg,rgba(11,42,74,.07) 1px,transparent 1px);
  background-size:32px 32px;
}
.img-frame img{width:100%;height:100%;object-fit:cover;display:block}
.img-frame--wide{aspect-ratio:21/9}
.img-frame--square{aspect-ratio:1/1}
.img-frame--tall{aspect-ratio:3/4}
.img-frame--data{
  aspect-ratio:16/10;background-color:var(--sea);
  background-image:
    linear-gradient(90deg,rgba(159,195,217,.18) 1px,transparent 1px),
    linear-gradient(0deg,rgba(159,195,217,.18) 1px,transparent 1px);
  background-size:40px 40px;border-color:var(--line-light);
}
.figure{margin:0}
.figure-cap{
  margin-top:9px;
  font-family:var(--font-mono);font-size:11px;line-height:1.65;letter-spacing:.06em;color:var(--slate);
}

/* ========== 11 JS states ========== */
.js [data-reveal]{opacity:0;transform:translateY(10px)}
.js [data-reveal].is-in{opacity:1;transform:none;transition:opacity .32s ease,transform .32s ease}
[data-filter-item][hidden]{display:none}

/* ========== 12 responsive ========== */
@media (max-width:1120px){
  .hdr-nav-link{font-size:12.5px;padding:10px 8px 9px}
  .nav-index{display:none}
}
@media (max-width:960px){
  html{scroll-padding-top:170px}
  .site-header{position:sticky}
  .nav-toggle{display:flex}
  .hdr-inner{flex-wrap:wrap;padding-block:12px}
  .hdr-nav{
    position:absolute;left:0;right:0;top:100%;display:none;
    background:var(--rice);
    border-top:1px solid var(--line);
    border-bottom:1px solid var(--line-strong);
    box-shadow:0 22px 34px -28px rgba(11,42,74,.7);
    max-height:calc(100vh - 120px);overflow-y:auto;
  }
  .hdr-nav[data-open="true"]{display:block}
  .hdr-nav-list{flex-direction:column;align-items:stretch;gap:0;padding:8px var(--gutter) 18px}
  .hdr-nav-link{
    width:100%;padding:14px 2px;border-top:0;
    border-bottom:1px solid var(--line);font-size:14px;
  }
  .hdr-nav-link:hover{background:transparent}
  .hdr-nav-link[aria-current="page"]{border-bottom-color:var(--orange)}
  .nav-index{display:inline;margin-right:2px}
}
@media (max-width:900px){
  .grid--3{grid-template-columns:repeat(2,minmax(0,1fr))}
  .index-rail{grid-template-columns:minmax(0,1fr)}
  .ft-inner{grid-template-columns:1fr 1fr}
}
@media (max-width:720px){
  .grid--2,.grid--3,.grid--split{grid-template-columns:minmax(0,1fr)}
  .lede{font-size:15px}
  .data-table{font-size:12.5px}
  .data-table th,.data-table td{padding:9px 8px}
}
@media (max-width:640px){
  .rail-note{display:none}
  .rail-inner{min-height:auto;padding-block:8px;gap:8px 12px}
  .rail-status{font-size:10px;letter-spacing:.12em}
  .brand-name{font-size:17px}
  .brand-mark{min-width:42px;height:42px;font-size:12px}
  .display{font-size:clamp(2.3rem,10vw,3.4rem)}
}
@media (max-width:520px){
  .ft-inner{grid-template-columns:minmax(0,1fr)}
  .ft-legal-inner{flex-direction:column;align-items:flex-start}
  .btn{padding:11px 16px;font-size:12px}
  .rail-actions{width:100%;justify-content:space-between}
}

/* ========== 13 reduced motion ========== */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
  }
  .read-progress-bar{transition:none}
  .js [data-reveal]{opacity:1;transform:none}
}