*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:96px}
body,h1,h2,h3,h4,p,ul,ol,figure,blockquote,dl,dd{margin:0}
ul,ol{padding:0;list-style:none}
img,svg,video{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
#main-content{display:block}

:root{
  --ink-navy:#0A111F;
  --deck:#111E35;
  --phoenix:#FF5A1F;
  --ember:#C93412;
  --emerald:#0E3B3A;
  --wine:#5C1F2C;
  --neon:#C8FF3D;
  --gold:#FFC857;
  --fog:#F4EFE6;
  --graphite:#28313F;

  --fog-90:rgba(244,239,230,.90);
  --fog-70:rgba(244,239,230,.70);
  --fog-50:rgba(244,239,230,.50);
  --fog-16:rgba(244,239,230,.16);
  --fog-08:rgba(244,239,230,.08);
  --line:rgba(244,239,230,.14);

  --tilt:-6deg;
  --tilt-soft:-3deg;
  --radius-s:10px;
  --radius-m:18px;
  --radius-l:28px;
  --radius-pill:999px;
  --radius-organic:22px 6px 22px 6px;

  --shadow-hot:0 18px 44px -24px rgba(255,90,31,.85);
  --shadow-deep:0 24px 60px -30px rgba(0,0,0,.9);

  --ease:cubic-bezier(.2,.7,.3,1);
  --dur:180ms;
  --dur-slow:220ms;

  --shell:1280px;
  --gutter:clamp(16px,4vw,40px);

  --font-display:"HarmonyOS Sans SC","Source Han Sans SC","Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,sans-serif;
  --font-body:"Source Han Sans SC","Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,sans-serif;
  --font-mono:"JetBrains Mono","IBM Plex Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,"Courier New",monospace;
}

body{
  min-height:100vh;
  font-family:var(--font-body);
  font-size:16px;
  line-height:1.75;
  font-weight:400;
  color:var(--fog);
  background:
    radial-gradient(1100px 620px at 88% -8%,rgba(255,90,31,.18),transparent 62%),
    radial-gradient(760px 520px at -6% 12%,rgba(14,59,58,.55),transparent 60%),
    var(--ink-navy);
  background-repeat:no-repeat;
}

:focus-visible{outline:2px solid var(--gold);outline-offset:3px;border-radius:4px}

/* ============ 页头 ============ */
.site-header{
  position:sticky;
  top:0;
  z-index:100;
  padding:12px 0 14px;
  background:linear-gradient(180deg,rgba(10,17,31,.97) 0%,rgba(10,17,31,.88) 70%,rgba(10,17,31,.62) 100%);
  border-bottom:1px solid var(--line);
  -webkit-backdrop-filter:blur(14px) saturate(1.2);
  backdrop-filter:blur(14px) saturate(1.2);
}
.skip-link{
  position:absolute;
  left:var(--gutter);
  top:-70px;
  z-index:200;
  display:inline-block;
  padding:10px 18px;
  border-radius:var(--radius-pill);
  background:var(--gold);
  color:var(--ink-navy);
  font-size:14px;
  font-weight:700;
  transition:top var(--dur) var(--ease);
}
.skip-link:focus{top:12px}
.header-shell{
  position:relative;
  width:min(calc(100% - 2 * var(--gutter)),var(--shell));
  margin-inline:auto;
  display:flex;
  align-items:center;
  gap:16px;
}

.brand{display:inline-flex;align-items:center;gap:11px;flex:0 0 auto}
.brand-mark{
  position:relative;
  width:34px;
  height:34px;
  flex:0 0 auto;
  border-radius:10px;
  background:linear-gradient(140deg,var(--phoenix),var(--ember));
  transform:skewX(-8deg);
  box-shadow:0 10px 22px -12px rgba(255,90,31,.95);
}
.brand-mark::before{
  content:"";
  position:absolute;
  inset:8px 14px 8px 9px;
  background:var(--ink-navy);
  clip-path:polygon(0 0,100% 50%,0 100%,34% 50%);
}
.brand-text{display:flex;flex-direction:column;line-height:1.05;gap:3px}
.brand-text__name{
  font-family:var(--font-display);
  font-size:17px;
  font-weight:800;
  letter-spacing:.05em;
  color:var(--fog);
  white-space:nowrap;
}
.brand-text__sub{
  font-family:var(--font-mono);
  font-size:10.5px;
  letter-spacing:.2em;
  color:var(--gold);
  white-space:nowrap;
}

.nav-capsule{
  flex:1 1 auto;
  min-width:0;
  display:flex;
  justify-content:center;
  padding:6px;
  border-radius:var(--radius-pill);
  background:rgba(17,30,53,.82);
  border:1px solid var(--fog-16);
  box-shadow:0 18px 40px -34px rgba(0,0,0,.95);
}
.nav-list{display:flex;align-items:center;justify-content:center;gap:2px;flex-wrap:nowrap}
.nav-item{display:block}
.nav-link{
  display:inline-flex;
  align-items:center;
  gap:7px;
  padding:9px 13px;
  border-radius:var(--radius-pill);
  border:1px solid transparent;
  font-size:13.5px;
  font-weight:600;
  letter-spacing:.01em;
  color:var(--fog-70);
  white-space:nowrap;
  transition:color var(--dur) var(--ease),background var(--dur) var(--ease),border-color var(--dur) var(--ease),transform var(--dur) var(--ease),box-shadow var(--dur) var(--ease);
}
.nav-link:hover{color:var(--fog);background:rgba(255,90,31,.16);transform:translateY(-1px)}
.nav-link__idx{
  font-family:var(--font-mono);
  font-size:10.5px;
  letter-spacing:.06em;
  color:var(--gold);
  opacity:.9;
}
.nav-link__label{display:inline-block}
.nav-link[aria-current="page"]{
  color:var(--fog);
  border-color:var(--phoenix);
  background:rgba(255,90,31,.2);
  box-shadow:0 0 0 1px rgba(255,90,31,.18),0 12px 26px -20px var(--phoenix);
}
.nav-link[aria-current="page"] .nav-link__idx{color:var(--gold);opacity:1}

.header-actions{display:flex;align-items:center;gap:10px;flex:0 0 auto}
.header-cta{font-size:13.5px;padding:11px 18px;min-height:40px}

.nav-toggle{
  display:none;
  align-items:center;
  gap:8px;
  padding:10px 14px;
  border-radius:var(--radius-pill);
  border:1px solid var(--fog-16);
  background:rgba(244,239,230,.06);
  color:var(--fog);
  font-size:13px;
  font-weight:700;
  transition:border-color var(--dur) var(--ease),background var(--dur) var(--ease);
}
.nav-toggle:hover{border-color:var(--phoenix);background:rgba(255,90,31,.16)}
.nav-toggle__bars{display:inline-flex;flex-direction:column;justify-content:center;gap:4px;width:16px;height:12px}
.nav-toggle__bar{
  display:block;
  height:2px;
  width:100%;
  border-radius:2px;
  background:var(--phoenix);
  transition:transform var(--dur) var(--ease),opacity var(--dur) var(--ease);
}
.nav-toggle__label{line-height:1}
[data-open] .nav-toggle__bar:first-child{transform:translateY(3px) rotate(45deg)}
[data-open] .nav-toggle__bar:last-child{transform:translateY(-3px) rotate(-45deg)}
[data-open] .nav-toggle{border-color:var(--phoenix);background:rgba(255,90,31,.2)}

.scroll-progress{
  position:absolute;
  left:0;
  right:0;
  bottom:0;
  height:2px;
  background:rgba(244,239,230,.08);
}
.scroll-progress__bar{
  display:block;
  width:0;
  height:100%;
  background:linear-gradient(90deg,var(--phoenix),var(--gold));
  transition:width 90ms linear;
}

/* ============ 页脚 ============ */
.site-footer{
  position:relative;
  margin-top:clamp(56px,9vw,120px);
  background:linear-gradient(180deg,#0B1424 0%,#070C16 100%);
  color:var(--fog-70);
}
.footer-edge{
  height:clamp(40px,6vw,72px);
  background:linear-gradient(100deg,var(--phoenix) 0%,var(--ember) 58%,var(--wine) 100%);
  clip-path:polygon(0 100%,100% 0,100% 100%,0 100%);
}
.footer-shell{
  width:min(calc(100% - 2 * var(--gutter)),var(--shell));
  margin-inline:auto;
  padding:clamp(32px,5vw,64px) 0 clamp(24px,4vw,48px);
  display:grid;
  grid-template-columns:minmax(220px,1fr) minmax(0,2.6fr);
  gap:clamp(28px,4vw,64px);
  align-items:start;
}
.footer-brand{display:flex;flex-direction:column;gap:10px}
.footer-brand__name{
  font-family:var(--font-display);
  font-size:clamp(22px,2.4vw,28px);
  font-weight:800;
  letter-spacing:.05em;
  color:var(--fog);
  line-height:1.15;
}
.footer-brand__name::after{
  content:"";
  display:block;
  width:48px;
  height:3px;
  margin-top:10px;
  border-radius:2px;
  background:linear-gradient(90deg,var(--phoenix),var(--gold));
}
.footer-brand__tag{
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.22em;
  color:var(--gold);
}
.footer-brand__note{
  font-size:14px;
  line-height:1.85;
  color:var(--fog-50);
  max-width:34ch;
}
.footer-grid{
  display:grid;
  grid-template-columns:repeat(auto-fit,minmax(170px,1fr));
  gap:clamp(20px,3vw,36px);
  align-items:start;
}
.footer-group{display:block;min-width:0}
.footer-group--wide{min-width:0}
.footer-group__title{
  display:flex;
  align-items:center;
  gap:8px;
  margin-bottom:14px;
  font-family:var(--font-mono);
  font-size:12px;
  font-weight:600;
  letter-spacing:.16em;
  color:var(--fog);
}
.footer-group__title::before{
  content:"";
  width:6px;
  height:6px;
  border-radius:1px;
  background:var(--gold);
  transform:rotate(45deg);
}
.footer-links{display:grid;gap:9px}
.footer-link{
  display:inline-block;
  font-size:14px;
  line-height:1.6;
  color:var(--fog-70);
  border-bottom:1px solid transparent;
  transition:color var(--dur) var(--ease),border-color var(--dur) var(--ease);
}
.footer-link:hover{color:var(--phoenix);border-bottom-color:var(--phoenix)}
.footer-contact{display:grid;gap:12px}
.footer-contact__row{display:flex;gap:10px;align-items:baseline}
.footer-contact__label{
  flex:0 0 auto;
  min-width:44px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.14em;
  color:var(--gold);
}
.footer-contact__value{
  flex:1 1 auto;
  font-size:14px;
  line-height:1.7;
  color:var(--fog-70);
  word-break:break-word;
}
.footer-bottom{
  border-top:1px solid rgba(244,239,230,.1);
  background:rgba(0,0,0,.28);
}
.footer-bottom__inner{
  width:min(calc(100% - 2 * var(--gutter)),var(--shell));
  margin-inline:auto;
  padding:18px 0 22px;
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px 22px;
  font-size:12.5px;
  color:var(--fog-50);
}
.footer-copy{font-family:var(--font-mono);letter-spacing:.04em}
.footer-icp{font-family:var(--font-mono);letter-spacing:.04em;color:var(--fog-70)}
.to-top{
  position:fixed;
  right:clamp(14px,3vw,28px);
  bottom:clamp(14px,3vw,28px);
  z-index:90;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  padding:11px 18px;
  border-radius:var(--radius-pill);
  background:var(--phoenix);
  color:var(--ink-navy);
  font-size:13px;
  font-weight:700;
  box-shadow:var(--shadow-hot);
  opacity:0;
  visibility:hidden;
  transform:translateY(10px);
  transition:opacity var(--dur) var(--ease),transform var(--dur) var(--ease),visibility var(--dur) var(--ease),background var(--dur) var(--ease),color var(--dur) var(--ease);
}
.to-top.is-visible{opacity:1;visibility:visible;transform:translateY(0)}
.to-top:hover{background:var(--gold);color:var(--ink-navy)}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  min-height:44px;
  padding:12px 22px;
  border-radius:var(--radius-pill);
  border:1px solid transparent;
  font-family:var(--font-body);
  font-size:14.5px;
  font-weight:700;
  letter-spacing:.02em;
  text-align:center;
  transition:background var(--dur) var(--ease),color var(--dur) var(--ease),border-color var(--dur) var(--ease),transform var(--dur) var(--ease),box-shadow var(--dur) var(--ease);
}
.btn--primary{background:var(--phoenix);color:var(--ink-navy);box-shadow:var(--shadow-hot)}
.btn--primary:hover{background:var(--ember);color:var(--fog);transform:translateY(-2px)}
.btn--ghost{background:transparent;color:var(--fog);border-color:rgba(244,239,230,.28)}
.btn--ghost:hover{border-color:var(--phoenix);color:var(--phoenix);transform:translateY(-2px)}
.btn--quiet{background:rgba(244,239,230,.08);color:var(--fog)}
.btn--quiet:hover{background:rgba(255,90,31,.2);transform:translateY(-2px)}
.btn--block{width:100%}

/* ============ 页面通用骨架 ============ */
.fw-container{
  width:min(calc(100% - 2 * var(--gutter)),var(--shell));
  margin-inline:auto;
}
.fw-section{padding:clamp(48px,7vw,96px) 0}
.fw-section--deck{
  background:linear-gradient(180deg,rgba(17,30,53,.94),rgba(17,30,53,.58));
  border-block:1px solid var(--line);
}
.fw-section--emerald{
  background:linear-gradient(180deg,rgba(14,59,58,.94),rgba(14,59,58,.55));
  border-block:1px solid rgba(200,255,61,.14);
}
.fw-section--wine{
  background:linear-gradient(180deg,rgba(92,31,44,.94),rgba(92,31,44,.5));
  border-block:1px solid rgba(255,200,87,.16);
}
.fw-section--fog{background:var(--fog);color:var(--graphite)}
.fw-section--fog .fw-lead,
.fw-section--fog .fw-text{color:rgba(40,49,63,.82)}
.fw-section--fog .fw-eyebrow{color:var(--ember)}

.fw-eyebrow{
  display:inline-flex;
  align-items:center;
  gap:9px;
  font-family:var(--font-mono);
  font-size:12px;
  font-weight:500;
  letter-spacing:.22em;
  color:var(--gold);
  text-transform:uppercase;
}
.fw-eyebrow::before{
  content:"";
  width:22px;
  height:2px;
  border-radius:2px;
  background:linear-gradient(90deg,var(--phoenix),var(--gold));
}
.fw-display{
  font-family:var(--font-display);
  font-weight:900;
  font-size:clamp(34px,7vw,96px);
  line-height:.98;
  letter-spacing:-.02em;
  color:var(--fog);
  transform:skewX(var(--tilt));
  transform-origin:left bottom;
}
.fw-h2{
  font-family:var(--font-display);
  font-weight:800;
  font-size:clamp(26px,3.6vw,44px);
  line-height:1.15;
  letter-spacing:-.01em;
}
.fw-h3{
  font-family:var(--font-display);
  font-weight:800;
  font-size:clamp(19px,2vw,24px);
  line-height:1.3;
}
.fw-lead{
  font-size:clamp(16px,1.4vw,19px);
  line-height:1.8;
  color:var(--fog-70);
}
.fw-text{font-size:16px;line-height:1.75;color:var(--fog-70)}

.fw-grid{
  display:grid;
  grid-template-columns:repeat(auto-fit,minmax(min(260px,100%),1fr));
  gap:clamp(14px,2vw,24px);
}

.fw-card{
  position:relative;
  display:flex;
  flex-direction:column;
  gap:10px;
  padding:clamp(18px,2.4vw,28px);
  border-radius:var(--radius-m);
  border:1px solid var(--line);
  background:linear-gradient(160deg,rgba(17,30,53,.94),rgba(10,17,31,.94));
  color:var(--fog);
  transition:border-color var(--dur-slow) var(--ease),transform var(--dur-slow) var(--ease),box-shadow var(--dur-slow) var(--ease);
}
.fw-card--link:hover,
.fw-card--link:focus-visible{
  border-color:var(--phoenix);
  transform:translate(-2px,-3px) skewX(-1deg);
  box-shadow:var(--shadow-hot);
}
.fw-card__index{
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.18em;
  color:var(--gold);
}
.fw-card__title{
  font-family:var(--font-display);
  font-size:clamp(18px,1.8vw,22px);
  font-weight:800;
  line-height:1.28;
}
.fw-card__text{font-size:14.5px;line-height:1.75;color:var(--fog-70)}
.fw-card__more{
  margin-top:auto;
  display:inline-flex;
  align-items:center;
  gap:6px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.12em;
  color:var(--phoenix);
}
.fw-card__more::after{content:"→";transition:transform var(--dur) var(--ease)}
.fw-card--link:hover .fw-card__more::after,
.fw-card--link:focus-visible .fw-card__more::after{transform:translateX(4px)}

.fw-tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:4px 11px;
  border-radius:var(--radius-pill);
  border:1px solid transparent;
  font-family:var(--font-mono);
  font-size:11.5px;
  font-weight:500;
  letter-spacing:.1em;
  line-height:1.6;
  white-space:nowrap;
}
.fw-tag--neon{background:rgba(200,255,61,.14);color:var(--neon);border-color:rgba(200,255,61,.42)}
.fw-tag--gold{background:rgba(255,200,87,.14);color:var(--gold);border-color:rgba(255,200,87,.42)}
.fw-tag--wine{background:rgba(92,31,44,.72);color:var(--fog);border-color:rgba(244,239,230,.22)}

.fw-breadcrumb{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.08em;
  color:var(--fog-50);
}
.fw-breadcrumb__item{display:inline-flex;align-items:center;gap:8px}
.fw-breadcrumb__link{
  color:var(--fog-70);
  border-bottom:1px solid transparent;
  transition:color var(--dur) var(--ease),border-color var(--dur) var(--ease);
}
.fw-breadcrumb__link:hover{color:var(--phoenix);border-bottom-color:var(--phoenix)}
.fw-breadcrumb__sep{color:var(--fog-50);opacity:.6}

.fw-prose{
  background:var(--fog);
  color:var(--graphite);
  border-radius:var(--radius-l);
  padding:clamp(22px,4vw,56px);
  line-height:1.85;
}
.fw-prose h2{
  font-family:var(--font-display);
  font-size:clamp(22px,2.6vw,32px);
  font-weight:800;
  line-height:1.25;
  color:var(--ink-navy);
}
.fw-prose h3{
  font-family:var(--font-display);
  font-size:clamp(17px,1.8vw,21px);
  font-weight:800;
  line-height:1.35;
  color:var(--ink-navy);
}
.fw-prose p,.fw-prose li{font-size:16px;line-height:1.85}
.fw-prose p + p,.fw-prose ul + p,.fw-prose p + ul,.fw-prose h2 + p,.fw-prose h3 + p{margin-top:14px}
.fw-prose ul{padding-left:1.15em;list-style:disc}
.fw-prose a{
  color:var(--ember);
  text-decoration:underline;
  text-underline-offset:3px;
}
.fw-prose a:hover{color:var(--phoenix)}

.media-frame{
  position:relative;
  overflow:hidden;
  aspect-ratio:16 / 9;
  border-radius:var(--radius-organic);
  background:linear-gradient(150deg,var(--deck) 0%,var(--emerald) 55%,var(--wine) 100%);
}
.media-frame::after{
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(115deg,rgba(255,90,31,.24),transparent 44%,rgba(14,59,58,.36));
  pointer-events:none;
}
.media-frame__img{
  width:100%;
  height:100%;
  object-fit:cover;
  display:block;
}
.media-frame--wide{aspect-ratio:21 / 9}
.media-frame--square{aspect-ratio:1 / 1}
.media-frame--tall{aspect-ratio:4 / 5}

/* ============ 响应式 ============ */
@media (max-width:1180px){
  .nav-link{font-size:12.5px;padding:8px 10px;gap:5px}
  .nav-link__idx{font-size:9.5px}
  .header-cta{font-size:13px;padding:10px 14px}
  .brand-text__sub{letter-spacing:.16em}
}

@media (max-width:960px){
  html{scroll-padding-top:88px}
  .site-header{padding:10px 0 12px}
  .header-shell{gap:10px}
  .nav-capsule{
    position:absolute;
    top:calc(100% + 12px);
    left:0;
    right:0;
    display:none;
    flex-direction:column;
    justify-content:flex-start;
    padding:10px;
    border-radius:22px;
    background:rgba(10,17,31,.98);
    border:1px solid var(--line);
    box-shadow:var(--shadow-deep);
    z-index:120;
  }
  [data-open] .nav-capsule{display:flex}
  .nav-list{flex-direction:column;align-items:stretch;gap:4px;width:100%}
  .nav-item{width:100%}
  .nav-link{
    width:100%;
    justify-content:flex-start;
    padding:13px 14px;
    font-size:15px;
    border-radius:14px;
  }
  .nav-link__label{flex:1 1 auto;text-align:left}
  .nav-link__idx{font-size:11px;min-width:20px}
  .nav-toggle{display:inline-flex}
  .header-actions{margin-left:auto}
  .footer-shell{grid-template-columns:1fr}
  .footer-edge{clip-path:polygon(0 100%,100% 0,100% 100%,0 100%)}
  .fw-display{transform:skewX(var(--tilt-soft))}
}

@media (max-width:560px){
  .brand-mark{width:30px;height:30px}
  .brand-text__name{font-size:15.5px}
  .brand-text__sub{font-size:9.5px}
  .nav-toggle__label{display:none}
  .nav-toggle{padding:10px 12px}
  .footer-bottom__inner{flex-direction:column;align-items:flex-start}
  .to-top{right:14px;bottom:14px}
}

@media (max-width:420px){
  .header-cta{display:none}
}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
  }
  .fw-display{transform:none}
  .nav-link:hover{transform:none}
  .fw-card--link:hover,
  .fw-card--link:focus-visible{transform:none}
  .btn:hover{transform:none}
  .to-top{transform:none}
  .scroll-progress__bar{transition:none}
}