/* ============================================================
   GFile · AI MEMORY CHAIN — base.css
   设计系统 / 布局 / 导航 / Hero / 通用组件
   ============================================================ */

:root{
  --bg0:#04070c;
  --bg1:#060c14;
  --bg2:#0a1422;
  --bg3:#0e1a2b;
  --line:rgba(146,180,220,.10);
  --line2:rgba(146,180,220,.20);
  --txt:#e9f1f7;
  --dim:#93a4b8;
  --dim2:#5c6d82;
  --cyan:#3fe0c8;
  --cyan-soft:rgba(63,224,200,.13);
  --amber:#ffb454;
  --amber-soft:rgba(255,180,84,.13);
  --blue:#5aa9ff;
  --red:#ff5d73;
  --green:#3ddc97;
  --fd:'Unbounded',sans-serif;
  --fb:'Noto Sans SC',sans-serif;
  --fm:'JetBrains Mono',monospace;
  --rad:16px;
  --maxw:1200px;
  --navh:72px;
  --ease:cubic-bezier(.22,.7,.24,1);
}

*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}

html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}

body{
  background:var(--bg0);
  color:var(--txt);
  font-family:var(--fb);
  font-size:16px;
  line-height:1.75;
  overflow-x:hidden;
}

::selection{background:rgba(63,224,200,.28);color:#fff}

::-webkit-scrollbar{width:10px;height:10px}
::-webkit-scrollbar-track{background:var(--bg0)}
::-webkit-scrollbar-thumb{background:#1a2839;border-radius:6px;border:2px solid var(--bg0)}
::-webkit-scrollbar-thumb:hover{background:#27405c}

img,svg{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
button{font-family:inherit;color:inherit;background:none;border:none;cursor:pointer}
input,select,output{font-family:inherit}
ul,ol{list-style:none}
i,em{font-style:normal}
b,strong{font-weight:700}

.mono{font-family:var(--fm)}
.t-cyan{color:var(--cyan)}
.t-amber{color:var(--amber)}
.ok{color:var(--green)}
.bad{color:var(--red)}

.container{
  max-width:var(--maxw);
  margin-inline:auto;
  padding-inline:clamp(20px,4vw,40px);
}

/* ---------- 纹理与光标 ---------- */
.grain{
  position:fixed;inset:-50%;z-index:2147483000;pointer-events:none;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='240' height='240'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.85' numOctaves='2'/%3E%3C/filter%3E%3Crect width='240' height='240' filter='url(%23n)' opacity='.5'/%3E%3C/svg%3E");
  opacity:.05;mix-blend-mode:overlay;
}
#cursor-glow{
  position:fixed;top:0;left:0;width:520px;height:520px;z-index:3;
  pointer-events:none;border-radius:50%;
  background:radial-gradient(circle,rgba(63,224,200,.075),transparent 62%);
  mix-blend-mode:screen;transform:translate(-50%,-50%);
  opacity:0;transition:opacity .5s;
}
body.fine-pointer #cursor-glow{opacity:1}

/* ---------- 滚动显现 ---------- */
[data-reveal]{
  opacity:0;transform:translateY(28px);
  transition:opacity .9s var(--ease),transform .9s var(--ease);
}
[data-reveal].in{opacity:1;transform:none}
[data-delay="1"]{transition-delay:.12s}
[data-delay="2"]{transition-delay:.24s}
[data-delay="3"]{transition-delay:.36s}
[data-delay="4"]{transition-delay:.48s}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;gap:10px;
  padding:14px 28px;border-radius:12px;
  font-weight:700;font-size:15px;letter-spacing:.02em;
  transition:transform .35s var(--ease),box-shadow .35s var(--ease),
             background .35s,border-color .35s,color .35s;
  white-space:nowrap;
}
.btn .arr{transition:transform .35s var(--ease)}
.btn:hover .arr{transform:translateX(5px)}
.btn-primary{
  background:linear-gradient(135deg,var(--cyan),#22b8d9);
  color:#03231d;
  box-shadow:0 8px 30px -8px rgba(63,224,200,.45),inset 0 1px 0 rgba(255,255,255,.35);
}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 14px 40px -8px rgba(63,224,200,.6)}
.btn-ghost{
  border:1px solid var(--line2);color:var(--txt);
  background:rgba(255,255,255,.02);
}
.btn-ghost:hover{border-color:rgba(63,224,200,.5);background:var(--cyan-soft);color:var(--cyan)}
.btn-sm{padding:9px 18px;font-size:13.5px;border-radius:10px}

/* ---------- 徽标 ---------- */
.logo{display:inline-flex;align-items:center;gap:10px}
.logo-mark{
  width:auto;height:26px;flex-shrink:0;
  filter:drop-shadow(0 0 14px rgba(63,224,200,.35));
  transition:transform .5s var(--ease),filter .5s;
}
.logo:hover .logo-mark{transform:translateY(-2px) rotate(-4deg);filter:drop-shadow(0 0 20px rgba(63,224,200,.55))}
.logo-txt{font-weight:900;font-size:19px;letter-spacing:.06em}
.logo-sub{font-family:var(--fm);font-size:9px;letter-spacing:.32em;color:var(--dim2);margin-left:2px;transform:translateY(3px)}

/* ---------- 导航 ---------- */
#nav{
  position:fixed;top:0;left:0;right:0;z-index:1000;
  height:var(--navh);
  transition:background .4s,border-color .4s,backdrop-filter .4s;
  border-bottom:1px solid transparent;
}
#nav.scrolled{
  background:rgba(4,8,14,.78);
  backdrop-filter:blur(16px);
  -webkit-backdrop-filter:blur(16px);
  border-bottom-color:var(--line);
}
.nav-inner{
  max-width:var(--maxw);margin-inline:auto;
  height:100%;padding-inline:clamp(20px,4vw,40px);
  display:flex;align-items:center;gap:32px;
}
.nav-links{display:flex;gap:6px;margin-left:auto}
.nav-links a{
  position:relative;padding:8px 13px;border-radius:9px;
  font-size:14px;color:var(--dim);font-weight:500;
  transition:color .3s,background .3s;
}
.nav-links a:hover{color:var(--txt);background:rgba(255,255,255,.045)}
.nav-links a.active{color:var(--cyan)}
.nav-links a.active::after{
  content:"";position:absolute;left:50%;bottom:1px;transform:translateX(-50%);
  width:4px;height:4px;border-radius:50%;background:var(--cyan);
  box-shadow:0 0 8px var(--cyan);
}
.nav-burger{display:none;flex-direction:column;gap:5px;padding:10px;margin-left:auto}
.nav-burger span{
  width:20px;height:2px;background:var(--txt);border-radius:2px;
  transition:transform .35s var(--ease),opacity .3s;
}
.nav-burger.open span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.nav-burger.open span:nth-child(2){opacity:0}
.nav-burger.open span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
.nav-drawer{
  position:fixed;top:var(--navh);left:0;right:0;z-index:999;
  background:rgba(4,9,15,.96);backdrop-filter:blur(18px);
  border-bottom:1px solid var(--line);
  display:flex;flex-direction:column;padding:18px clamp(20px,4vw,40px) 26px;gap:4px;
  opacity:0;pointer-events:none;transform:translateY(-10px);
  transition:opacity .35s,transform .35s var(--ease);
}
.nav-drawer.open{opacity:1;pointer-events:auto;transform:none}
.nav-drawer a{padding:12px 8px;font-size:16px;color:var(--dim);border-bottom:1px solid var(--line)}
.nav-drawer a:hover{color:var(--cyan)}
.nav-drawer .btn{margin-top:14px;justify-content:center;border-bottom:none}

/* ---------- 通用 Section ---------- */
.sec{
  position:relative;
  padding:clamp(84px,11vw,140px) 0;
  scroll-margin-top:calc(var(--navh) + 8px);
}
.sec:nth-child(even){background:linear-gradient(180deg,var(--bg1),var(--bg0))}
.sec-head{
  display:flex;gap:clamp(20px,4vw,48px);
  margin-bottom:clamp(44px,6vw,72px);
  align-items:flex-start;
}
.sec-no{
  font-family:var(--fd);font-weight:700;font-size:clamp(40px,5vw,64px);
  line-height:1;color:transparent;
  -webkit-text-stroke:1px rgba(146,180,220,.28);
  letter-spacing:.04em;flex-shrink:0;margin-top:6px;
}
.kicker{
  font-size:11.5px;letter-spacing:.3em;color:var(--cyan);
  margin-bottom:16px;text-transform:uppercase;
}
.sec-head h2{
  font-size:clamp(28px,3.6vw,44px);font-weight:900;line-height:1.25;
  letter-spacing:.015em;
}
.sec-sub{color:var(--dim);margin-top:14px;max-width:560px;font-size:15.5px}
.hl-cyan{color:var(--cyan);text-shadow:0 0 26px rgba(63,224,200,.45)}
.hl-amber{color:var(--amber);text-shadow:0 0 26px rgba(255,180,84,.4)}

/* ---------- HERO ---------- */
.hero{
  position:relative;min-height:100svh;
  display:flex;align-items:center;
  padding:calc(var(--navh) + 56px) 0 90px;
  overflow:hidden;scroll-margin-top:0;
}
#net-canvas{position:absolute;inset:0;z-index:0}
.hero-grid{
  position:absolute;inset:0;z-index:0;pointer-events:none;
  background-image:
    linear-gradient(rgba(120,170,220,.05) 1px,transparent 1px),
    linear-gradient(90deg,rgba(120,170,220,.05) 1px,transparent 1px);
  background-size:58px 58px;
  -webkit-mask-image:radial-gradient(ellipse 90% 70% at 50% 0%,#000 30%,transparent 78%);
  mask-image:radial-gradient(ellipse 90% 70% at 50% 0%,#000 30%,transparent 78%);
}
.hero-glow{position:absolute;border-radius:50%;filter:blur(90px);pointer-events:none;z-index:0}
.hero-glow-a{width:640px;height:640px;top:-220px;left:-160px;background:radial-gradient(circle,rgba(63,224,200,.16),transparent 65%)}
.hero-glow-b{width:560px;height:560px;bottom:-240px;right:-120px;background:radial-gradient(circle,rgba(255,180,84,.11),transparent 65%)}

.hero-inner{
  position:relative;z-index:2;
  display:grid;grid-template-columns:1.04fr .96fr;
  gap:clamp(36px,5vw,72px);align-items:center;
}
.hero-kicker{
  display:inline-flex;align-items:center;gap:10px;
  font-size:11px;letter-spacing:.22em;color:var(--dim);
  border:1px solid var(--line);border-radius:999px;
  padding:8px 16px;margin-bottom:30px;
  background:rgba(255,255,255,.02);
}
.hero-kicker .dot,.console-live .dot{
  width:7px;height:7px;border-radius:50%;background:var(--green);
  box-shadow:0 0 10px var(--green);
  animation:pulse 2s infinite;
}
@keyframes pulse{0%,100%{opacity:1}50%{opacity:.35}}

.hero-title{
  font-size:clamp(34px,4.6vw,58px);
  font-weight:900;line-height:1.22;letter-spacing:.015em;
  margin-bottom:26px;
}
.hero-sub{
  color:var(--dim);font-size:clamp(15px,1.3vw,17px);
  max-width:560px;margin-bottom:38px;
}
.hero-sub b{color:var(--txt);font-weight:700}
.hero-actions{display:flex;gap:16px;flex-wrap:wrap;margin-bottom:52px}

.hero-stats{
  display:grid;grid-template-columns:repeat(4,auto);
  gap:clamp(22px,3vw,44px);
  border-top:1px solid var(--line);padding-top:26px;
}
.stat-v{
  font-family:var(--fd);font-weight:500;
  font-size:clamp(17px,1.6vw,22px);color:var(--txt);
  letter-spacing:.02em;white-space:nowrap;
}
.stat-v .mono{font-family:inherit}
.stat-k{font-size:12.5px;color:var(--dim2);margin-top:5px}

/* Hero 控制台 */
.hero-console{
  background:linear-gradient(180deg,rgba(14,24,38,.92),rgba(7,13,21,.96));
  border:1px solid var(--line2);border-radius:var(--rad);
  box-shadow:0 30px 80px -20px rgba(0,0,0,.65),0 0 0 1px rgba(63,224,200,.05);
  overflow:hidden;position:relative;
}
.hero-console::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:repeating-linear-gradient(0deg,transparent 0 3px,rgba(255,255,255,.012) 3px 4px);
}
.console-bar{
  display:flex;align-items:center;gap:8px;
  padding:13px 16px;border-bottom:1px solid var(--line);
  background:rgba(255,255,255,.02);
}
.c-dot{width:11px;height:11px;border-radius:50%}
.c-dot.r{background:#ff5f57}.c-dot.y{background:#febc2e}.c-dot.g{background:#28c840}
.console-title{font-size:11px;color:var(--dim);margin-left:8px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.console-live{
  margin-left:auto;display:flex;align-items:center;gap:7px;
  font-size:10px;letter-spacing:.2em;color:var(--green);
}
.console-body{
  height:400px;overflow:hidden;padding:18px 18px 10px;
  font-size:12.3px;line-height:1.85;
  display:flex;flex-direction:column;justify-content:flex-end;
}
.console-body .ln{white-space:pre-wrap;word-break:break-all;animation:lnIn .4s var(--ease)}
@keyframes lnIn{from{opacity:0;transform:translateY(6px)}to{opacity:1;transform:none}}
.console-foot{
  padding:12px 18px;border-top:1px solid var(--line);
  font-size:10.5px;color:var(--dim2);letter-spacing:.04em;
  background:rgba(255,255,255,.02);
}
.cursor-blink{display:inline-block;width:7px;height:14px;background:var(--cyan);vertical-align:-2px;animation:blink 1s steps(1) infinite}
@keyframes blink{50%{opacity:0}}

/* 滚动提示 */
.hero-scroll{
  position:absolute;left:50%;bottom:26px;transform:translateX(-50%);z-index:2;
  display:flex;flex-direction:column;align-items:center;gap:10px;
  font-size:9.5px;letter-spacing:.4em;color:var(--dim2);
}
.hero-scroll i{
  width:1px;height:44px;
  background:linear-gradient(var(--cyan),transparent);
  animation:scrollHint 2s var(--ease) infinite;
  transform-origin:top;
}
@keyframes scrollHint{0%{transform:scaleY(0)}45%{transform:scaleY(1)}100%{transform:scaleY(1);opacity:0}}

/* ---------- TICKER ---------- */
.ticker{
  border-block:1px solid var(--line);
  background:rgba(255,255,255,.015);
  overflow:hidden;position:relative;
  -webkit-mask-image:linear-gradient(90deg,transparent,#000 8%,#000 92%,transparent);
  mask-image:linear-gradient(90deg,transparent,#000 8%,#000 92%,transparent);
}
.ticker-track{
  display:inline-flex;gap:0;white-space:nowrap;
  padding:13px 0;will-change:transform;
  animation:tick 46s linear infinite;
}
.ticker:hover .ticker-track{animation-play-state:paused}
@keyframes tick{to{transform:translateX(-50%)}}
.ticker-track span{
  font-size:12px;color:var(--dim);padding:0 30px;position:relative;
}
.ticker-track span::after{
  content:"";position:absolute;right:0;top:50%;transform:translateY(-50%);
  width:4px;height:4px;border-radius:50%;background:var(--dim2);opacity:.5;
}

/* ---------- 响应式 ---------- */
@media (max-width:1080px){
  .hero-inner{grid-template-columns:1fr;gap:48px}
  .hero-console{max-width:640px}
  .console-body{height:320px}
  /* 星球居中铺在首屏文案背后，压一层暗底 scrim 保住可读性 */
  .hero-kicker,.hero-title,.hero-sub,.hero-stats .stat-v{
    text-shadow:0 2px 20px rgba(4,7,12,.92),0 0 46px rgba(4,7,12,.72);
  }
}
@media (max-width:900px){
  .nav-links{display:none}
  .nav-burger{display:flex}
  .sec-head{flex-direction:column;gap:16px}
  .hero-stats{grid-template-columns:repeat(2,1fr);gap:22px}
  .hero-scroll{display:none}
}
@media (max-width:560px){
  .logo-sub{display:none}
  .hero-actions .btn{width:100%;justify-content:center}
  .console-body{height:280px;font-size:11.3px}
}

/* ---------- 无动画偏好 ---------- */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation-duration:.001s!important;transition-duration:.001s!important}
  [data-reveal]{opacity:1;transform:none}
  .ticker-track{animation:none}
  #cursor-glow{display:none}
}