/* ============================================================
   XevCore · volt 子页面共享主题（刷机/接线/表情/购买）
   与 volt/ 主页同一设计语言：暗底 #0A0A0B · 青色强调 · 玻璃胶囊导航
   ============================================================ */

/* ---------- Tokens ---------- */
:root{
  --bg:#0A0A0B;
  --bg-2:#111113;
  --bg-3:#18181B;
  --line:rgba(237,237,232,.08);
  --line-2:rgba(237,237,232,.14);
  --text:#EDEDE8;
  --muted:rgba(237,237,232,.58);
  --faint:rgba(237,237,232,.34);
  --lime:#27E6FF;
  --lime-ink:#0A0A0B;
  --danger:#FF8A7A;
  --ok:#7CF9B0;
  --warn:#FFB057;
  --ease:cubic-bezier(.32,.72,0,1);
  --ease-out:cubic-bezier(.16,1,.3,1);
  --r-card:28px;
  --r-inner:22px;
  --gutter:clamp(16px,3.2vw,48px);
  --mono:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  /* ---- 旧主题兼容别名（子页面专属样式沿用旧变量名也能吃到 volt tokens） ---- */
  --cyan:var(--lime);
  --ink:var(--text);
  --ink-2:var(--muted);
  --ink-3:var(--faint);
  --coral:var(--danger);
  --glass:rgba(237,237,232,.03);
  --glass-line:rgba(237,237,232,.1);
}

*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{background:var(--bg);color-scheme:dark;-webkit-text-size-adjust:100%}
body{
  background:var(--bg);color:var(--text);
  font-family:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",system-ui,sans-serif;
  font-size:17px;line-height:1.55;
  -webkit-font-smoothing:antialiased;overflow-x:hidden;
}
img{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
::selection{background:var(--lime);color:var(--lime-ink)}
:focus-visible{outline:2px solid var(--lime);outline-offset:3px;border-radius:6px}
code,pre,.mono{font-family:var(--mono)}
code{color:#9FE9FF;background:rgba(39,230,255,.08);padding:1px 7px;border-radius:6px;font-size:.92em}

/* Grain 噪点（与主页一致） */
body::after{
  content:"";position:fixed;inset:-50%;z-index:50;pointer-events:none;opacity:.06;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

/* ---------- 工具类 ---------- */
.wrap{width:100%;max-width:1480px;margin:0 auto;padding:0 var(--gutter)}
.display{font-weight:600;letter-spacing:-.02em;line-height:1.06;text-wrap:balance}
.lime{color:var(--lime)}
.muted{color:var(--muted)}
.tnum{font-variant-numeric:tabular-nums}
.nb{white-space:nowrap}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:500;color:var(--lime);margin-bottom:18px;letter-spacing:.04em}
.eyebrow i{font-size:15px}

/* ---------- 页头 ---------- */
.page-hero{padding:150px 0 42px;text-align:center;position:relative}
.page-hero h1{font-size:clamp(2.8rem,6.4vw,6rem)}
.page-hero h1 .hl{color:var(--lime)}
.page-hero .sub{color:var(--muted);font-size:16.5px;max-width:620px;margin:16px auto 0;line-height:1.8}
.crumbs{display:flex;gap:10px;justify-content:center;align-items:center;font-size:12.5px;color:var(--faint);margin-bottom:10px}
.crumbs a{color:var(--muted);transition:color .3s var(--ease)}
.crumbs a:hover{color:var(--lime)}
.page-eyes{display:flex;justify-content:center;margin-bottom:6px;transform:scale(.9)}

/* ---------- 按钮（与主页同款） ---------- */
.btn{
  position:relative;display:inline-flex;align-items:center;gap:14px;white-space:nowrap;
  height:54px;padding:0 8px 0 26px;border-radius:999px;font-weight:500;font-size:16px;
  transition:transform .5s var(--ease),background-color .5s var(--ease),color .5s var(--ease);
}
.btn:active{transform:scale(.98)}
.btn .ico{width:40px;height:40px;border-radius:999px;display:grid;place-items:center;font-size:18px;transition:transform .6s var(--ease)}
.btn:hover .ico{transform:translate(3px,-2px) scale(1.06)}
.btn-lime{background:var(--lime);color:var(--lime-ink)}
.btn-lime .ico{background:var(--lime-ink);color:var(--lime)}
.btn-lime:hover{background:#7AF9FF}
.btn-ghost{background:rgba(237,237,232,.06);color:var(--text);box-shadow:inset 0 0 0 1px var(--line-2)}
.btn-ghost .ico{background:rgba(237,237,232,.08)}
.btn-ghost:hover{background:rgba(237,237,232,.1)}
.btn-sm{height:44px;padding:0 6px 0 20px;font-size:15px;gap:10px}
.btn-sm .ico{width:32px;height:32px;font-size:15px}
.btn[disabled]{opacity:.85;cursor:progress}

/* ---------- 导航（与主页同款胶囊） ---------- */
.nav::before{content:"";position:absolute;inset:0 0 -24px;z-index:-1;pointer-events:none;background:linear-gradient(to bottom,rgba(10,10,11,.85),rgba(10,10,11,0))}
.nav{position:fixed;top:0;left:0;right:0;z-index:20;padding:16px var(--gutter);display:flex;align-items:center;justify-content:space-between;gap:24px;height:76px}
.brand{display:flex;align-items:center;gap:10px;font-weight:700;font-size:22px;letter-spacing:.02em}
.brand-mark{width:22px;height:14px;background:var(--lime);transform:skewX(-24deg);border-radius:2px}
.nav-links{
  position:relative;display:flex;gap:4px;padding:5px;border-radius:999px;
  background:linear-gradient(180deg,rgba(255,255,255,.07),rgba(255,255,255,.02));
  backdrop-filter:blur(22px) saturate(160%);-webkit-backdrop-filter:blur(22px) saturate(160%);
  box-shadow:inset 0 0 0 1px rgba(255,255,255,.09),inset 0 1px 0 rgba(255,255,255,.14),0 10px 30px -12px rgba(0,0,0,.6);
}
.nav-links a{position:relative;z-index:1;padding:9px 16px;border-radius:999px;font-size:14.5px;color:var(--muted);transition:color .45s var(--ease)}
.nav-links a:hover{color:var(--text)}
.nav-links a.active{background:linear-gradient(180deg,rgba(39,230,255,.16),rgba(39,230,255,.06));color:var(--text);box-shadow:inset 0 0 0 1px rgba(39,230,255,.35)}
.nav-right{display:flex;align-items:center;gap:10px}
.burger{display:none;width:44px;height:44px;border-radius:999px;position:relative;background:rgba(17,17,19,.6);box-shadow:inset 0 0 0 1px var(--line-2)}
.burger i{position:absolute;left:13px;right:13px;height:1.5px;background:var(--text);transition:transform .6s var(--ease),top .6s var(--ease)}
.burger i:nth-child(1){top:18px}.burger i:nth-child(2){top:25px}
.menu-open .burger i:nth-child(1){top:21.5px;transform:rotate(45deg)}
.menu-open .burger i:nth-child(2){top:21.5px;transform:rotate(-45deg)}
.menu{
  position:fixed;inset:0;z-index:30;background:rgba(10,10,11,.86);backdrop-filter:blur(30px);-webkit-backdrop-filter:blur(30px);
  display:flex;flex-direction:column;justify-content:center;padding:var(--gutter);gap:6px;
  opacity:0;visibility:hidden;transition:opacity .6s var(--ease),visibility 0s linear .6s;
}
.menu a{font-size:clamp(2.2rem,9vw,3.6rem);font-weight:600;line-height:1.05;transform:translateY(48px);opacity:0;transition:transform .8s var(--ease),opacity .8s var(--ease)}
.menu a.lime{color:var(--lime)}
.menu-open .menu{opacity:1;visibility:visible;transition:opacity .6s var(--ease)}
.menu-open .menu a{transform:none;opacity:1}
.menu-open .menu a:nth-child(2){transition-delay:.05s}.menu-open .menu a:nth-child(3){transition-delay:.1s}
.menu-open .menu a:nth-child(4){transition-delay:.15s}.menu-open .menu a:nth-child(5){transition-delay:.2s}
.menu-open .menu a:nth-child(6){transition-delay:.25s}.menu-open .menu a:nth-child(7){transition-delay:.3s}
.menu-open .nav{z-index:35}

/* ---------- 代码雨背景 ---------- */
#hero-canvas{position:fixed;inset:0;z-index:0;width:100%;height:100%;display:block;opacity:0;pointer-events:none}
main{position:relative;z-index:1}

/* ---------- 卡片（shell/core 与主页同款） ---------- */
.shell{padding:6px;border-radius:var(--r-card);background:rgba(237,237,232,.03);box-shadow:inset 0 0 0 1px var(--line)}
.core{height:100%;border-radius:var(--r-inner);background:var(--bg-2);box-shadow:inset 0 1px 0 rgba(255,255,255,.05);position:relative;overflow:hidden;padding:clamp(22px,2.4vw,32px)}
.panel{padding:6px;border-radius:var(--r-card);background:rgba(237,237,232,.03);box-shadow:inset 0 0 0 1px var(--line)}
.panel>.pin{height:100%;border-radius:var(--r-inner);background:var(--bg-2);box-shadow:inset 0 1px 0 rgba(255,255,255,.05);padding:clamp(20px,2.2vw,30px)}
.panel.hoverable{transition:transform .35s var(--ease),box-shadow .35s var(--ease)}
.panel.hoverable:hover{transform:translateY(-4px);box-shadow:inset 0 0 0 1px rgba(39,230,255,.4),0 12px 40px rgba(39,230,255,.10)}
.card-title{font-weight:500;font-size:clamp(1.3rem,1.9vw,1.7rem);line-height:1.1;letter-spacing:-.01em}
.card-body{color:var(--muted);font-size:15px;line-height:1.7;margin-top:8px}
.card-ico{font-size:24px;color:var(--lime)}

/* ---------- 通用小件 ---------- */
.tag{display:inline-flex;align-items:center;gap:6px;padding:5px 12px;border-radius:999px;font-size:12.5px;color:var(--muted);background:rgba(237,237,232,.05);box-shadow:inset 0 0 0 1px var(--line)}
.tag i{color:var(--lime)}
section{position:relative}
.sec{padding:clamp(48px,6vw,88px) 0}
.sec-head{text-align:center;margin-bottom:clamp(28px,4vw,52px)}
.sec-head h2{font-size:clamp(1.8rem,3.6vw,3rem)}

/* ---------- 表单件（购买页/通用） ---------- */
.field{display:grid;gap:8px}
.field label{font-size:14px;font-weight:500;color:var(--text)}
.field input,.field select{
  height:54px;border-radius:14px;border:0;background:var(--bg);color:var(--text);font:inherit;font-size:16px;padding:0 18px;
  box-shadow:inset 0 0 0 1px var(--line-2);transition:box-shadow .3s var(--ease);appearance:none;-webkit-appearance:none;
}
.field input::placeholder{color:rgba(237,237,232,.45)}
.field input:focus,.field select:focus{outline:none;box-shadow:inset 0 0 0 2px var(--lime)}
.field .err{font-size:13.5px;color:var(--danger);min-height:0}
.field.invalid input{box-shadow:inset 0 0 0 2px var(--danger)}

/* ---------- 滚动渐入 ---------- */
.reveal{opacity:0;transform:translateY(26px);transition:opacity .9s var(--ease-out),transform .9s var(--ease-out)}
.reveal.in{opacity:1;transform:none}

/* ---------- 页脚（简化版 volt footer） ---------- */
footer.volt{border-top:1px solid var(--line);padding:clamp(40px,5vw,64px) 0 28px;background:var(--bg)}
footer.volt .foot-row{display:flex;justify-content:space-between;align-items:center;gap:20px;flex-wrap:wrap}
footer.volt .legal{margin-top:26px;padding-top:18px;border-top:1px solid var(--line);display:flex;justify-content:space-between;gap:14px;flex-wrap:wrap;color:var(--faint);font-size:13px}

/* ---------- 响应式 ---------- */
@media (max-width:1024px){
  .nav-links{display:none}
  .burger{display:block}
}
@media (max-width:767px){
  body{font-size:16px}
  .nav .btn{display:none}
  .page-hero{padding:118px 0 32px}
}
@media (prefers-reduced-motion:reduce){
  *{transition-duration:.01ms!important;animation-duration:.01ms!important}
}