*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;text-size-adjust:100%;scroll-padding-top:124px}
body,h1,h2,h3,h4,h5,p,ul,ol,li,figure,figcaption,blockquote,dl,dd{margin:0}
ul,ol{padding:0}
ul[class],ol[class]{list-style:none}
img,svg,video{display:block;max-width:100%}
button{font:inherit;color:inherit}
a{color:inherit}
:where(h1,h2,h3,h4){line-height:1.15;text-wrap:balance}

:root{
  --ink-900:#0F2B24;
  --ink-700:#1C4A3C;
  --cream-050:#F4F0E6;
  --cream-100:#E8E2D4;
  --cream-200:#D9D1BE;
  --cyan-400:#35E0C8;
  --cyan-700:#0E7F72;
  --amber-500:#E08A2B;
  --amber-700:#A65C12;
  --rust-500:#C4553B;
  --graphite-600:#4A5A55;
  --paper:#FFFFFF;
  --page:#F1EDE3;
  --line:rgba(15,43,36,.15);
  --line-soft:rgba(15,43,36,.09);
  --font-display:"Saira Condensed","Oswald","PingFang SC","Microsoft YaHei",system-ui,sans-serif;
  --font-serif:"Noto Serif SC","Source Han Serif SC","Songti SC","SimSun",serif;
  --font-sans:"Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --font-mono:"IBM Plex Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  --radius-s:6px;
  --radius-m:14px;
  --radius-l:24px;
  --gutter:clamp(16px,4vw,40px);
  --ease:cubic-bezier(0.22,1,0.36,1);
  --header-h:108px;
}

body{
  background-color:var(--page);
  background-image:radial-gradient(rgba(15,43,36,.05) .8px,transparent .8px);
  background-size:4px 4px;
  color:var(--ink-900);
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.75;
  min-height:100vh;
}
@media (max-width:720px){body{font-size:15px;line-height:1.7}}
p{max-width:68ch}
strong{font-weight:700}

:focus-visible{outline:2px solid var(--cyan-700);outline-offset:2px;border-radius:4px}
.brand-bar :focus-visible,.nav-toggle:focus-visible,.footer-cta :focus-visible,.footer-legal :focus-visible{outline-color:var(--cyan-400)}

.shell{width:min(1240px,100% - (var(--gutter) * 2));margin-inline:auto}

/* ---------- skip link ---------- */
.skip-link{
  position:fixed;top:10px;left:10px;z-index:200;
  transform:translateY(-180%);
  background:var(--cyan-400);color:var(--ink-900);
  padding:10px 18px;border-radius:999px;
  font-size:13px;font-weight:700;letter-spacing:.04em;text-decoration:none;
  transition:transform .2s var(--ease);
}
.skip-link:focus,.skip-link:focus-visible{transform:translateY(0)}

/* ---------- header ---------- */
.site-header{position:sticky;top:0;z-index:80}

.brand-bar{
  position:relative;
  background-color:var(--ink-900);
  background-image:linear-gradient(90deg,rgba(53,224,200,.07) 1px,transparent 1px);
  background-size:26px 100%;
  color:var(--cream-050);
}
.brand-bar__inner{
  display:flex;align-items:center;gap:clamp(10px,2vw,26px);
  min-height:52px;padding-block:8px;
}
.brand{display:inline-flex;align-items:center;gap:10px;text-decoration:none;color:var(--cream-050)}
.brand__mark{display:block;width:3px;height:28px;background:var(--amber-500);border-radius:2px}
.brand__text{display:block}
.brand__name{
  display:block;font-family:var(--font-display);
  font-size:19px;font-weight:700;line-height:1.1;letter-spacing:-.01em;
}
.brand__sub{
  display:block;font-size:10px;font-weight:700;line-height:1.4;
  letter-spacing:.18em;color:rgba(244,240,230,.6);
}
.brand-bar__meta{
  display:flex;align-items:center;gap:10px;
  margin-inline-start:clamp(4px,2vw,18px);font-size:12px;
}
.meta-chip{
  display:inline-block;padding:3px 10px;border-radius:999px;
  border:1px solid rgba(53,224,200,.42);color:var(--cyan-400);
  font-size:11px;font-weight:700;letter-spacing:.06em;white-space:nowrap;
}
.meta-domain{
  font-family:var(--font-mono);font-size:11px;letter-spacing:.02em;
  color:rgba(244,240,230,.55);white-space:nowrap;
}
.brand-bar__tools{margin-inline-start:auto;display:flex;align-items:center;gap:8px;flex-wrap:nowrap}

.tool-toggle{
  display:inline-flex;align-items:center;gap:7px;
  min-height:38px;padding:0 12px;
  background:transparent;color:var(--cream-050);
  border:1px solid rgba(244,240,230,.26);border-radius:999px;
  font-size:12px;font-weight:700;letter-spacing:.02em;
  cursor:pointer;transition:background .18s var(--ease),border-color .18s var(--ease),color .18s var(--ease);
}
.tool-toggle:hover{border-color:rgba(53,224,200,.6)}
.tool-toggle__dot{width:6px;height:6px;border-radius:50%;background:var(--cyan-400);box-shadow:0 0 0 3px rgba(53,224,200,.16)}
.tool-toggle[aria-pressed="true"]{background:rgba(53,224,200,.15);border-color:var(--cyan-400);color:var(--cyan-400)}

.tool-link{
  display:inline-flex;align-items:center;gap:6px;
  min-height:38px;padding:0 12px;border-radius:999px;
  border:1px dashed rgba(244,240,230,.3);
  color:var(--cream-050);text-decoration:none;
  font-size:12px;font-weight:700;letter-spacing:.02em;
  transition:border-color .18s var(--ease),color .18s var(--ease);
}
.tool-link:hover{border-color:var(--amber-500);color:var(--amber-500)}
.tool-link__count{
  min-width:18px;padding:0 5px;border-radius:999px;
  background:var(--amber-500);color:var(--ink-900);
  font-family:var(--font-mono);font-size:11px;font-weight:600;text-align:center;
}

.progress{position:absolute;left:0;right:0;bottom:0;height:2px;background:rgba(53,224,200,.16)}
.progress__bar{
  display:block;height:100%;width:0;
  background:linear-gradient(90deg,var(--cyan-400),var(--amber-500));
  transition:width .1s linear;
}

.nav-bar{
  position:relative;background:var(--cream-050);
  border-bottom:1px solid rgba(15,43,36,.18);
}
.nav-bar__inner{display:flex;align-items:center;gap:8px;min-height:56px}
.nav-list{display:flex;align-items:stretch;gap:2px;overflow-x:auto;scrollbar-width:thin}
.nav-list__item{flex:0 0 auto}
.nav-link{
  position:relative;display:inline-flex;align-items:center;
  min-height:44px;padding:0 15px;
  font-size:14px;font-weight:700;letter-spacing:.02em;
  color:var(--ink-900);text-decoration:none;border-radius:10px 10px 0 0;
  transition:background .16s var(--ease),color .16s var(--ease);
}
.nav-link:hover{background:var(--cream-100)}
.nav-link[aria-current="page"]{background:var(--ink-900);color:var(--cream-050)}
.nav-link[aria-current="page"]::after{
  content:"";position:absolute;left:12px;right:12px;bottom:-1px;height:3px;
  background:var(--cyan-400);border-radius:2px 2px 0 0;
}
.nav-bar__hint{
  margin-inline-start:auto;font-family:var(--font-mono);
  font-size:11px;letter-spacing:.08em;color:var(--graphite-600);white-space:nowrap;
}

.nav-toggle{
  display:none;align-items:center;gap:9px;
  min-height:44px;padding:0 14px;border-radius:10px;
  background:var(--ink-900);color:var(--cream-050);
  border:1px solid var(--ink-900);
  font-size:13px;font-weight:700;letter-spacing:.06em;cursor:pointer;
}
.nav-toggle__bars{position:relative;display:block;width:16px;height:2px;border-radius:2px;background:currentColor}
.nav-toggle__bars::before,.nav-toggle__bars::after{
  content:"";position:absolute;left:0;width:16px;height:2px;border-radius:2px;background:currentColor;
  transition:transform .22s var(--ease);
}
.nav-toggle__bars::before{top:-5px}
.nav-toggle__bars::after{top:5px}
.nav-toggle__label{font-size:13px}
.nav-bar[data-open] .nav-toggle__bars{background:transparent}
.nav-bar[data-open] .nav-toggle__bars::before{transform:translateY(5px) rotate(45deg)}
.nav-bar[data-open] .nav-toggle__bars::after{transform:translateY(-5px) rotate(-45deg)}

/* 紧凑模式（小屏稳定版开） */
[data-compact] .brand-bar{background-image:none}
[data-compact] .meta-domain{display:none}
[data-compact] .nav-bar__hint{display:none}
[data-compact] .footer-cta{background-image:none}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:44px;padding:0 18px;border-radius:999px;
  font-family:var(--font-sans);font-size:14px;font-weight:700;letter-spacing:.02em;
  text-decoration:none;border:1px solid transparent;cursor:pointer;
  transition:background .18s var(--ease),color .18s var(--ease),border-color .18s var(--ease),transform .18s var(--ease);
}
.btn--primary{background:var(--amber-500);color:#22140A}
.btn--primary:hover{background:var(--cyan-400);color:var(--ink-900)}
.btn--ghost{background:transparent;color:var(--ink-900);border-color:rgba(15,43,36,.35)}
.btn--ghost:hover{background:var(--ink-900);color:var(--cream-050);border-color:var(--ink-900)}
.btn--sm{min-height:38px;padding:0 14px;font-size:13px}
.btn--wide{min-height:52px;padding:0 30px;font-size:15px}

/* ---------- shared page primitives ---------- */
.breadcrumb{background:var(--cream-100);border-bottom:1px solid var(--line-soft)}
.breadcrumb__list{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  min-height:40px;font-size:12px;letter-spacing:.02em;
}
.breadcrumb__item{display:inline-flex;align-items:center;gap:8px;color:var(--graphite-600)}
.breadcrumb__item + .breadcrumb__item::before{content:"/";color:rgba(15,43,36,.34)}
.breadcrumb__link{color:var(--ink-700);text-decoration:none}
.breadcrumb__link:hover{color:var(--cyan-700);text-decoration:underline;text-underline-offset:3px}
.breadcrumb__current{color:var(--ink-900);font-weight:700}

.section{padding-block:clamp(32px,5vw,64px)}
.section--dark{background:var(--ink-900);color:var(--cream-050)}
.section--tint{background:var(--cream-100)}
.section-head{
  display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;
  gap:12px;margin-bottom:clamp(18px,3vw,32px);
  padding-bottom:12px;border-bottom:1px dashed var(--line);
}
.section-head__title{font-family:var(--font-serif);font-weight:600;font-size:clamp(22px,3vw,34px);line-height:1.25}
.section-head__kicker{font-family:var(--font-mono);font-size:11px;letter-spacing:.2em;color:var(--cyan-700)}
.section--dark .section-head__kicker{color:var(--cyan-400)}
.section--dark .section-head{border-bottom-color:rgba(244,240,230,.24)}

.grid{display:grid;gap:clamp(16px,2vw,26px)}
.grid--2{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid--3{grid-template-columns:repeat(3,minmax(0,1fr))}
.grid--auto{grid-template-columns:repeat(auto-fit,minmax(230px,1fr))}

.card{
  background:var(--paper);border:1px solid var(--line);border-radius:var(--radius-m);
  padding:clamp(16px,2vw,24px);
}
.card--ink{background:var(--ink-900);color:var(--cream-050);border-color:transparent}
.card--flat{background:var(--cream-100);border-color:transparent}

.tag-strip{
  display:flex;gap:8px;overflow-x:auto;padding-block:14px;
  border-block:1px dashed rgba(15,43,36,.22);scrollbar-width:thin;
}
.tag{
  flex:0 0 auto;display:inline-flex;align-items:center;gap:6px;
  min-height:44px;padding:0 16px;
  background:var(--cream-050);color:var(--ink-900);
  border:1px solid rgba(15,43,36,.28);border-radius:14px 4px 14px 4px;
  font-size:12px;font-weight:700;letter-spacing:.04em;text-decoration:none;cursor:pointer;
  transition:background .18s var(--ease),color .18s var(--ease),box-shadow .18s var(--ease);
}
.tag:hover{background:var(--cream-100)}
.tag--active,.tag[aria-pressed="true"]{
  background:var(--ink-900);color:var(--cream-050);
  border-color:var(--ink-900);box-shadow:inset 0 0 0 1px var(--cyan-400);
}

.stat{display:grid;gap:4px}
.stat__value{
  font-family:var(--font-mono);font-variant-numeric:tabular-nums;
  font-size:clamp(22px,3vw,32px);font-weight:600;line-height:1.05;
}
.stat__value--up{color:var(--amber-700)}
.stat__value--down{color:var(--cyan-700)}
.stat__label{font-size:11px;font-weight:700;letter-spacing:.1em;color:var(--graphite-600);text-transform:uppercase}
.section--dark .stat__label,.card--ink .stat__label{color:rgba(244,240,230,.66)}
.section--dark .stat__value--up,.card--ink .stat__value--up{color:var(--amber-500)}
.section--dark .stat__value--down,.card--ink .stat__value--down{color:var(--cyan-400)}

.media-frame{
  position:relative;isolation:isolate;overflow:hidden;
  aspect-ratio:16/10;border-radius:var(--radius-m);
  background:var(--ink-700);
}
.media-frame::before{
  content:"";position:absolute;inset:0;z-index:0;opacity:.55;
  background-image:
    linear-gradient(rgba(53,224,200,.16) 1px,transparent 1px),
    linear-gradient(90deg,rgba(53,224,200,.16) 1px,transparent 1px);
  background-size:28px 28px;
}
.media-frame img{position:relative;z-index:1;width:100%;height:100%;object-fit:cover}
.media-frame--tall{aspect-ratio:4/5}
.media-frame--wide{aspect-ratio:21/9}
.media-frame--square{aspect-ratio:1/1}
.media-frame__cap{
  position:absolute;z-index:2;left:12px;bottom:12px;
  padding:5px 10px;border-radius:10px 3px 10px 3px;
  background:rgba(15,43,36,.88);color:var(--cream-050);
  font-size:11px;font-weight:700;letter-spacing:.06em;
}

/* 显现协议 */
[data-reveal-ready] [data-reveal]{opacity:0;transform:translateY(14px)}
[data-reveal-ready] [data-reveal].is-shown{
  opacity:1;transform:none;
  transition:opacity .5s var(--ease),transform .5s var(--ease);
}

/* ---------- footer ---------- */
.footer-cta{
  background-color:var(--ink-900);
  background-image:linear-gradient(90deg,rgba(53,224,200,.08) 1px,transparent 1px);
  background-size:30px 100%;
  color:var(--cream-050);
  border-top:3px solid var(--cyan-400);
}
.footer-cta__inner{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;
  gap:20px;padding-block:clamp(26px,4vw,44px);
}
.footer-cta__text{max-width:52ch}
.footer-cta__eyebrow{
  font-family:var(--font-mono);font-size:11px;letter-spacing:.22em;
  text-transform:uppercase;color:var(--cyan-400);margin-bottom:6px;
}
.footer-cta__title{
  font-family:var(--font-display);font-weight:700;
  font-size:clamp(21px,3vw,34px);line-height:1.2;letter-spacing:-.01em;
  max-width:none;
}

.footer-main{background:var(--cream-100);border-top:1px solid var(--ink-900)}
.footer-grid{
  display:grid;
  grid-template-columns:1.5fr .8fr .8fr .9fr 1.25fr;
  gap:clamp(18px,2.4vw,36px);
  padding-block:clamp(30px,4.5vw,56px);
}
.footer-brand__name{
  font-family:var(--font-display);font-size:22px;font-weight:700;
  letter-spacing:-.01em;line-height:1.2;
}
.footer-brand__note{
  margin-top:10px;font-size:13px;line-height:1.7;color:var(--graphite-600);max-width:26em;
}
.footer-col__title{
  font-size:12px;font-weight:700;letter-spacing:.14em;
  color:var(--ink-900);padding-bottom:8px;margin-bottom:12px;
  border-bottom:1px solid rgba(15,43,36,.2);
}
.footer-col__list{display:grid;gap:6px}
.footer-col__link{
  display:inline-block;padding-block:3px;
  font-size:14px;color:var(--ink-700);text-decoration:none;
  transition:color .16s var(--ease);
}
.footer-col__link:hover{color:var(--cyan-700);text-decoration:underline;text-underline-offset:3px}
.footer-col__static{
  display:inline-flex;align-items:center;gap:6px;padding-block:3px;
  font-size:14px;color:rgba(74,90,85,.8);
}
.footer-col__static::after{
  content:"待开放";font-size:10px;font-weight:700;letter-spacing:.04em;
  border:1px solid currentColor;border-radius:999px;padding:0 5px;color:var(--amber-700);
}
.footer-col--contact{display:grid;align-content:start;gap:6px}
.contact-line{
  display:grid;grid-template-columns:auto minmax(0,1fr);gap:10px;
  font-size:13px;line-height:1.6;color:var(--ink-700);max-width:none;
}
.contact-line > span:last-child{overflow-wrap:anywhere}
.contact-line__k{
  font-family:var(--font-mono);font-size:11px;letter-spacing:.08em;
  color:var(--cyan-700);padding-top:3px;
}
.contact-note{
  margin-top:8px;padding-top:10px;border-top:1px dashed rgba(15,43,36,.22);
  font-size:12px;line-height:1.65;color:var(--graphite-600);max-width:32em;
}

.footer-legal{background:var(--ink-900);color:rgba(244,240,230,.74)}
.footer-legal__inner{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;
  gap:10px 20px;padding-block:14px;
}
.footer-legal__copy{
  font-family:var(--font-mono);font-size:11px;letter-spacing:.04em;max-width:none;
}
.footer-legal__links{display:flex;flex-wrap:wrap;gap:16px;font-size:12px}
.footer-legal__links a{color:var(--cyan-400);text-decoration:none}
.footer-legal__links a:hover{color:var(--amber-500);text-decoration:underline;text-underline-offset:3px}

/* ---------- responsive ---------- */
@media (max-width:1280px){
  .nav-link{padding:0 12px;font-size:13px}
}
@media (max-width:1080px){
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-brand{grid-column:1 / -1}
  .footer-col--contact{grid-column:1 / -1}
}
@media (max-width:960px){
  .grid--3{grid-template-columns:repeat(2,minmax(0,1fr))}
  .meta-domain{display:none}
  .nav-bar__hint{display:none}
}
@media (max-width:900px){
  :root{--header-h:104px}
  html{scroll-padding-top:112px}
  .nav-bar__inner{flex-wrap:wrap;gap:10px;min-height:52px;padding-block:6px}
  .nav-toggle{display:inline-flex}
  .nav-list{display:none}
  .nav-bar[data-open] .nav-list{
    display:grid;position:absolute;left:0;right:0;top:100%;z-index:70;
    background:var(--cream-050);
    border-bottom:2px solid var(--ink-900);
    box-shadow:0 18px 32px rgba(15,43,36,.2);
    padding:10px var(--gutter) 18px;
    max-height:calc(100dvh - 120px);overflow-y:auto;
  }
  .nav-list__item{width:100%}
  .nav-link{
    width:100%;justify-content:flex-start;border-radius:8px;
    border-bottom:1px dashed rgba(15,43,36,.14);
    min-height:48px;
  }
  .nav-link[aria-current="page"]::after{
    left:auto;right:14px;bottom:50%;width:18px;height:3px;
    transform:translateY(50%);border-radius:2px;
  }
}
@media (max-width:720px){
  .grid--2,.grid--3{grid-template-columns:minmax(0,1fr)}
  .brand__name{font-size:17px}
  .brand__sub{display:none}
  .brand-bar__meta{margin-inline-start:0}
  .tool-toggle span:not(.tool-toggle__dot){display:none}
  .tool-toggle{padding:0 10px}
  .tool-link{padding:0 10px}
  .brand-bar__tools{gap:6px}
  .footer-cta__inner{flex-direction:column;align-items:flex-start}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));padding-block:32px}
}
@media (max-width:480px){
  .grid--auto{grid-template-columns:minmax(0,1fr)}
  .footer-grid{grid-template-columns:minmax(0,1fr);gap:22px}
  .footer-legal__inner{flex-direction:column;align-items:flex-start}
  .btn--wide{width:100%}
  .media-frame,.media-frame--tall,.media-frame--wide{aspect-ratio:4/3}
}

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