@import url('https://fonts.googleapis.com/css2?family=Karla:wght@300;400;500;600;700&family=Playfair+Display+SC:wght@400;700&display=swap');

:root{
  --ink:#001e3c;
  --ink-deep:#00101d;
  --mint:#99ffcc;
  --neon:#00ff41;
  --paper:#e8fff5;
  --muted:rgba(232,255,245,.72);
  --faint:rgba(232,255,245,.55);
  --line:rgba(153,255,204,.22);
  --glass:rgba(9,48,74,.42);
  --serif:'Playfair Display SC',Georgia,'Times New Roman',serif;
  --sans:'Karla',-apple-system,BlinkMacSystemFont,'Segoe UI','PingFang SC','Hiragino Sans GB','Microsoft YaHei',sans-serif;
}

*,*::before,*::after{box-sizing:border-box}

html{
  scroll-behavior:smooth;
  -webkit-text-size-adjust:100%;
  background:var(--ink-deep);
}

body{
  margin:0;
  font-family:var(--sans);
  font-size:17px;
  line-height:1.75;
  color:var(--paper);
  min-height:100vh;
  overflow-x:hidden;
  background:
    radial-gradient(120% 78% at 50% -12%, #073a5f 0%, var(--ink) 44%, var(--ink-deep) 100%) fixed;
  background-color:var(--ink-deep);
}

body::before{
  content:"";
  position:fixed;
  inset:0;
  z-index:0;
  pointer-events:none;
  opacity:.7;
  background-image:radial-gradient(rgba(153,255,204,.17) 1px, transparent 1px);
  background-size:20px 20px;
  -webkit-mask-image:radial-gradient(135% 100% at 50% 0%, #000 24%, rgba(0,0,0,.08) 100%);
  mask-image:radial-gradient(135% 100% at 50% 0%, #000 24%, rgba(0,0,0,.08) 100%);
}

body::after{
  content:"";
  position:fixed;
  inset:-12%;
  z-index:0;
  pointer-events:none;
  filter:blur(44px);
  animation:breathe 16s ease-in-out infinite;
  background:
    radial-gradient(40% 44% at 16% 20%, rgba(0,255,65,.22), transparent 62%),
    radial-gradient(44% 48% at 84% 10%, rgba(153,255,204,.24), transparent 64%),
    radial-gradient(50% 54% at 66% 92%, rgba(0,255,65,.14), transparent 66%);
}

@keyframes breathe{
  0%,100%{transform:scale(1);opacity:.62}
  50%{transform:scale(1.09);opacity:.95}
}

@keyframes float{
  0%,100%{transform:translateY(0) rotate(-.6deg)}
  50%{transform:translateY(-12px) rotate(.6deg)}
}

/* 顶部两行：品牌行 + 菜单行 */
.site-head{
  position:sticky;
  top:0;
  z-index:30;
  background:rgba(0,16,29,.78);
  -webkit-backdrop-filter:blur(16px);
  backdrop-filter:blur(16px);
  border-bottom:1px solid var(--line);
}

.head-bar{
  max-width:1150px;
  margin:0 auto;
  padding:1rem 1.15rem .3rem;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:1rem;
}

.brand{
  display:inline-flex;
  align-items:center;
  gap:.6rem;
  min-height:40px;
  padding:.3rem 0;
  font-family:var(--serif);
  font-size:1.35rem;
  letter-spacing:.07em;
  line-height:1.2;
  color:var(--mint);
  text-decoration:none;
  transition:color .2s ease;
}

.brand .dot{
  width:.62rem;
  height:.62rem;
  border-radius:50%;
  background:var(--neon);
  box-shadow:0 0 14px rgba(0,255,65,.9);
  animation:breathe 5s ease-in-out infinite;
}

.brand:hover{color:#ffffff}

.head-nav{
  max-width:1150px;
  margin:0 auto;
  padding:0 .65rem .7rem;
  overflow-x:auto;
  overflow-y:hidden;
  scrollbar-width:none;
  -webkit-overflow-scrolling:touch;
}

.head-nav::-webkit-scrollbar{display:none}

.head-nav p{
  display:flex;
  align-items:center;
  gap:.08rem;
  margin:0;
  min-width:max-content;
}

.head-nav a{
  display:inline-flex;
  align-items:center;
  min-height:42px;
  padding:.5rem .72rem;
  border-radius:999px;
  font-size:1rem;
  white-space:nowrap;
  color:var(--muted);
  text-decoration:none;
  transition:color .2s ease, background .2s ease;
}

.head-nav a:hover,
.head-nav a:focus-visible{
  color:var(--ink);
  background:rgba(153,255,204,.9);
}

.head-nav a.nav-cta{
  margin-left:.5rem;
  background:var(--neon);
  color:#00220f;
  font-weight:700;
  box-shadow:0 0 0 1px rgba(0,255,65,.55), 0 10px 26px -12px rgba(0,255,65,.85);
}

.head-nav a.nav-cta:hover,
.head-nav a.nav-cta:focus-visible{
  background:#9cff9f;
  color:#001c0b;
}

/* 主区：正文左、侧栏右 */
main{
  position:relative;
  z-index:1;
  max-width:1150px;
  margin:0 auto;
  padding:0 1.15rem 3rem;
  display:grid;
  grid-template-columns:minmax(0,1fr) 17.5rem;
  gap:2.4rem;
  align-items:start;
}

.hero{
  grid-column:1 / -1;
  display:grid;
  grid-template-columns:1.06fr .94fr;
  gap:2rem;
  align-items:center;
  min-height:70vh;
  padding:2.6rem 0 1.8rem;
  border-bottom:1px solid var(--line);
}

.hero-copy{min-width:0}

.hero h1{
  margin:0 0 1.1rem;
  font-family:var(--serif);
  font-weight:400;
  font-size:clamp(2rem,5.2vw,3.5rem);
  line-height:1.12;
  letter-spacing:.01em;
  color:var(--mint);
  text-shadow:0 0 38px rgba(0,255,65,.3);
}

.hero-lead{
  margin:0;
  max-width:34ch;
  font-size:1.06rem;
  color:var(--muted);
}

.hero-art{
  position:relative;
  min-height:min(52vh,420px);
}

.hero-art figure{
  position:absolute;
  margin:0;
  overflow:hidden;
  border-radius:4px;
  border:1px solid var(--line);
  background:var(--glass);
  box-shadow:0 30px 60px -40px #000;
}

.hero-art img{
  display:block;
  width:100%;
  height:100%;
  object-fit:cover;
}

.collage-1{
  top:0;
  left:0;
  width:66%;
  height:78%;
  clip-path:polygon(50% 0,84% 10%,100% 42%,92% 76%,64% 100%,30% 98%,5% 76%,0 40%,16% 11%);
  animation:float 13s ease-in-out infinite;
}

.collage-2{
  right:0;
  bottom:0;
  width:52%;
  height:64%;
  clip-path:polygon(46% 0,80% 8%,100% 36%,96% 70%,70% 100%,32% 96%,6% 74%,0 40%,18% 10%);
  animation:float 17s ease-in-out infinite reverse;
}

/* 正文 */
.prose{min-width:0}

.prose div{
  margin:0 0 1.4rem;
  padding:1.6rem 1.5rem;
  background:var(--glass);
  border:1px solid var(--line);
  border-radius:4px;
  -webkit-backdrop-filter:blur(9px);
  backdrop-filter:blur(9px);
  box-shadow:0 22px 46px -34px rgba(0,0,0,.95);
  scroll-margin-top:9.5rem;
}

.prose div:last-child{margin-bottom:0}

.prose h2{
  margin:0 0 .65rem;
  font-family:var(--serif);
  font-weight:400;
  font-size:clamp(1.4rem,3.4vw,1.95rem);
  line-height:1.26;
  color:var(--mint);
}

.prose h2 + p{
  margin-top:-.1rem;
  font-size:1.06rem;
  color:#bcffe3;
}

.prose h3{
  margin:1.6rem 0 .5rem;
  font-size:1.15rem;
  color:var(--paper);
}

.prose p{margin:0 0 1rem}
.prose p:last-child{margin-bottom:0}

.prose a{color:var(--neon);text-underline-offset:3px}

.prose ul,.prose ol{margin:0 0 1rem;padding-left:1.35rem}
.prose li{margin:.32rem 0}
.prose li::marker{color:var(--neon)}

.prose img{
  display:block;
  max-width:100%;
  height:auto;
  margin:1rem 0;
  border-radius:4px;
}

.prose figure{margin:1rem 0}

.prose blockquote{
  margin:1.2rem 0;
  padding:.35rem 0 .35rem 1rem;
  border-left:2px solid var(--neon);
  color:var(--muted);
}

.prose strong{color:var(--mint)}
.prose hr{border:0;border-top:1px solid var(--line);margin:1.4rem 0}

/* 右侧栏 */
.rail{
  position:sticky;
  top:7.6rem;
  min-width:0;
}

.rail-inner{
  padding:1.2rem 1.1rem;
  background:rgba(0,30,60,.62);
  border:1px solid var(--line);
  border-radius:4px;
  -webkit-backdrop-filter:blur(10px);
  backdrop-filter:blur(10px);
  box-shadow:0 24px 48px -36px #000;
}

.rail h2{
  margin:0 0 .2rem;
  font-family:var(--serif);
  font-weight:400;
  font-size:1.15rem;
  letter-spacing:.04em;
  color:var(--mint);
}

.rail .subtitle{
  margin:0 0 .9rem;
  font-size:1rem;
  color:var(--faint);
}

.rail-nav{display:grid;gap:.12rem}

.rail-nav a{
  display:flex;
  align-items:center;
  min-height:40px;
  padding:.35rem .55rem;
  border-left:2px solid transparent;
  border-radius:4px;
  font-size:1rem;
  color:var(--muted);
  text-decoration:none;
  transition:background .2s ease, color .2s ease, border-color .2s ease;
}

.rail-nav a:hover,
.rail-nav a:focus-visible{
  background:rgba(153,255,204,.1);
  color:var(--mint);
  border-left-color:var(--neon);
}

.rail-nav a.active{
  color:var(--mint);
  background:rgba(153,255,204,.13);
  border-left-color:var(--neon);
}

/* 页脚 */
.site-foot{
  position:relative;
  z-index:1;
  display:grid;
  grid-template-columns:1.1fr 1.45fr auto;
  gap:1.8rem 2.2rem;
  align-items:start;
  max-width:1150px;
  margin:2rem auto 0;
  padding:2.4rem 1.15rem 2.4rem;
  border-top:1px solid var(--line);
  background:linear-gradient(180deg, rgba(0,30,60,.28), rgba(0,16,29,.92));
}

.foot-brand{min-width:0}

.foot-logo{
  display:inline-block;
  font-family:var(--serif);
  font-size:1.2rem;
  letter-spacing:.06em;
  color:var(--mint);
  text-decoration:none;
}

.foot-desc{
  margin:.55rem 0 1.1rem;
  max-width:38ch;
  font-size:1rem;
  color:var(--muted);
}

.foot-cta{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  min-height:48px;
  padding:.7rem 1.5rem;
  border-radius:4px;
  background:linear-gradient(120deg, var(--neon), var(--mint));
  color:#00200e;
  font-weight:700;
  font-size:1rem;
  text-decoration:none;
  box-shadow:0 16px 34px -18px rgba(0,255,65,.8);
  transition:transform .2s ease, box-shadow .2s ease;
}

.foot-cta:hover{
  transform:translateY(-2px);
  box-shadow:0 22px 40px -18px rgba(0,255,65,.95);
}

.foot-nav{
  display:flex;
  flex-wrap:wrap;
  gap:.1rem .4rem;
  align-content:flex-start;
}

.foot-nav a{
  display:inline-flex;
  align-items:center;
  min-height:40px;
  padding:.3rem .45rem;
  font-size:1rem;
  color:var(--muted);
  text-decoration:none;
  transition:color .2s ease;
}

.foot-nav a:hover,
.foot-nav a:focus-visible{color:var(--neon)}

.foot-copy{
  align-self:end;
  justify-self:end;
  font-size:1rem;
  color:var(--faint);
  white-space:nowrap;
}

/* 入场动效 */
.reveal{
  opacity:0;
  transform:translateY(16px);
  transition:opacity .62s ease, transform .62s ease;
}

.reveal.in{
  opacity:1;
  transform:none;
}

/* 平板 */
@media (max-width:980px){
  main{
    grid-template-columns:1fr;
    gap:1.7rem;
  }
  .hero{
    grid-template-columns:1fr;
    min-height:auto;
    padding:2rem 0 1.4rem;
  }
  .hero-art{
    min-height:320px;
    order:2;
  }
  .hero-lead{max-width:46ch}
  .rail{position:static;top:auto}
  .rail-inner{padding:1rem 1rem}
  .rail-nav{grid-template-columns:1fr 1fr;gap:.15rem .55rem}
}

/* 手机 */
@media (max-width:720px){
  .head-bar{padding-top:.85rem}
  .brand{font-size:1.22rem}
  .prose div{padding:1.25rem 1.1rem;scroll-margin-top:11rem}
  .prose h2 + p{font-size:1.04rem}
  .hero h1{font-size:clamp(1.9rem,8.2vw,2.7rem)}
  .hero-art{min-height:250px}
  .rail-nav{grid-template-columns:1fr}
  .site-foot{
    grid-template-columns:1fr;
    gap:1.3rem;
    justify-items:start;
    padding-top:2rem;
  }
  .foot-copy{
    justify-self:center;
    width:100%;
    text-align:center;
    padding-top:.4rem;
  }
  .foot-desc{max-width:none}
}

@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation:none !important;
    transition:none !important;
  }
  .reveal{opacity:1;transform:none}
}

button[aria-expanded]{min-width:44px;min-height:44px}