/* ============================================================
   老端工具箱 · 钢蓝深色商务风 v2.3.0.0 · 一屏版
   配色取自工具本体 DarkTheme.cs / SteelBlue.ssk 实际像素
   ============================================================ */
*{margin:0;padding:0;box-sizing:border-box}
:root{
  --bg-deep:#1E1E1E;
  --bg-dark:#2E2E2E;
  --bg-input:#3A3A3A;
  --bg-active:#3E4A5C;
  --steel:#3B579F;
  --steel-l:#5A7AA8;
  --steel-glow:#4A6FC4;
  --fg:#E8E8E8;
  --fg-log:#C8D8F0;
  --fg-muted:#8A8F99;
  --fg-dim:#6E6E6E;
  --gold:#FFD700;
  --line-soft:rgba(90,122,168,.22);
  --card:rgba(46,46,46,.72);
  --card-hi:rgba(62,74,92,.55);
  --radius:14px;
  --shadow:0 18px 48px rgba(0,0,0,.55);
  --shadow-steel:0 12px 32px rgba(59,87,159,.38);
  --ease:cubic-bezier(.22,.61,.36,1);
  --topbar-h:62px;
}
html,body{height:100%}
body{
  font-family:"Microsoft YaHei","PingFang SC","Segoe UI",Arial,sans-serif;
  background:var(--bg-deep);
  color:var(--fg);
  line-height:1.55;
  -webkit-font-smoothing:antialiased;
  overflow:hidden; /* PC 端锁定一屏 */
}
a{text-decoration:none;color:inherit}
img{display:block;max-width:100%}
::selection{background:var(--steel);color:#fff}
/* ===== 背景层 ===== */
.bg-layer{position:fixed;inset:0;z-index:0;pointer-events:none;overflow:hidden}
.bg-glow{position:absolute;border-radius:50%;filter:blur(110px)}
.bg-glow-1{width:640px;height:640px;top:-260px;right:-200px;
  background:radial-gradient(circle,rgba(59,87,159,.55),transparent 68%)}
.bg-glow-2{width:520px;height:520px;bottom:-240px;left:-180px;
  background:radial-gradient(circle,rgba(74,111,196,.30),transparent 70%)}
.bg-grid{position:absolute;inset:0;
  background-image:
    linear-gradient(rgba(90,122,168,.055) 1px,transparent 1px),
    linear-gradient(90deg,rgba(90,122,168,.055) 1px,transparent 1px);
  background-size:50px 50px;
  -webkit-mask-image:radial-gradient(ellipse at 50% 0%,#000 25%,transparent 75%);
  mask-image:radial-gradient(ellipse at 50% 0%,#000 25%,transparent 75%)}
/* ===== 外壳：撑满一屏 ===== */
.shell{
  position:relative;z-index:1;
  height:100vh;height:100dvh;
  display:flex;flex-direction:column;
  padding:0 clamp(20px,3.4vw,52px);
  max-width:1440px;margin:0 auto;
}
/* ===== 顶栏 ===== */
.topbar{
  flex:0 0 var(--topbar-h);
  display:flex;align-items:center;justify-content:space-between;
  border-bottom:1px solid var(--line-soft);
}
.brand{display:flex;align-items:center;gap:10px}
.brand img{width:30px;height:30px;border-radius:8px;box-shadow:0 4px 14px rgba(59,87,159,.5)}
.brand-name{font-size:16.5px;font-weight:800;letter-spacing:.3px;color:#fff}
.brand-ver{
  font-style:normal;font-size:11px;font-weight:700;color:#fff;
  background:linear-gradient(135deg,var(--steel),var(--steel-glow));
  padding:2px 9px;border-radius:20px;
}
.top-meta{font-size:12.5px;color:var(--fg-dim);letter-spacing:.5px}
/* ===== 主区两栏 ===== */
.main{
  flex:1;min-height:0;
  display:grid;grid-template-columns:1.02fr .98fr;
  gap:clamp(28px,4vw,60px);align-items:center;
  padding:clamp(8px,1.4vh,20px) 0 clamp(8px,1.4vh,18px);
}
/* —— 左栏 —— */
.left{display:flex;flex-direction:column;justify-content:center;min-width:0;max-width:640px}
.pill{
  display:inline-flex;align-self:flex-start;align-items:center;gap:8px;
  font-size:12px;font-weight:600;color:var(--fg-log);
  background:rgba(59,87,159,.16);
  border:1px solid rgba(90,122,168,.38);
  padding:5px 14px;border-radius:24px;margin-bottom:clamp(10px,1.8vh,18px);
}
.pill-dot{width:7px;height:7px;border-radius:50%;background:var(--gold);animation:pulse 2.2s infinite}
@keyframes pulse{
  0%{box-shadow:0 0 0 0 rgba(255,215,0,.6)}
  70%{box-shadow:0 0 0 8px rgba(255,215,0,0)}
  100%{box-shadow:0 0 0 0 rgba(255,215,0,0)}
}
h1{
  font-size:clamp(26px,3.3vw,44px);line-height:1.18;font-weight:900;
  letter-spacing:-1px;margin-bottom:clamp(10px,1.6vh,16px);color:#fff;
}
.hl{
  background:linear-gradient(100deg,#7FA6F0 0%,var(--steel-l) 45%,#A8C4F5 100%);
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
.desc{
  font-size:clamp(12.5px,1vw,14px);color:var(--fg-muted);line-height:1.75;
  margin-bottom:clamp(10px,1.8vh,18px);
}
.desc strong{color:var(--fg-log);font-weight:700}
/* 功能点：两列紧凑 */
.feats{
  list-style:none;
  display:grid;grid-template-columns:1fr 1fr;gap:6px 22px;
  margin-bottom:clamp(12px,2vh,20px);
}
.feats li{
  display:flex;align-items:baseline;gap:8px;font-size:12.5px;line-height:1.5;
  padding-left:14px;position:relative;
}
.feats li::before{
  content:"";position:absolute;left:0;top:.5em;width:6px;height:6px;
  border-radius:50%;background:var(--steel-l);
}
.feats b{color:#fff;font-weight:700;flex-shrink:0}
.feats span{color:var(--fg-muted);font-size:11.5px}
/* 按钮 */
.dl{display:flex;gap:12px;flex-wrap:wrap;margin-bottom:10px}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  font-weight:700;border-radius:11px;border:1.5px solid transparent;
  transition:.24s var(--ease);cursor:pointer;white-space:nowrap;font-family:inherit;
}
.btn-lg{padding:12px 26px;font-size:14.5px}
.btn-primary{
  background:linear-gradient(135deg,var(--steel) 0%,var(--steel-glow) 100%);
  color:#fff;box-shadow:var(--shadow-steel);
}
.btn-primary:hover{
  transform:translateY(-2px);
  box-shadow:0 16px 38px rgba(59,87,159,.55);
  background:linear-gradient(135deg,#4568B8 0%,#5A82D8 100%);
}
.btn-ghost{
  background:rgba(62,74,92,.42);color:var(--fg-log);border-color:var(--line-soft);
}
.btn-ghost:hover{background:rgba(62,74,92,.72);border-color:var(--steel-l);color:#fff}
.spec-line{font-size:11.5px;color:var(--fg-dim);margin-bottom:clamp(10px,1.8vh,18px)}
/* 数据条 */
.hero-stats{
  display:flex;border-top:1px solid var(--line-soft);
  padding-top:clamp(8px,1.5vh,16px);max-width:480px;
}
.stat{flex:1;padding-right:18px;border-right:1px solid var(--line-soft)}
.stat:last-child{border-right:none;padding-left:18px;padding-right:0}
.stat:first-child{padding-left:0}
.stat b{
  display:block;font-size:clamp(20px,2vw,27px);font-weight:900;line-height:1.15;
  background:linear-gradient(135deg,#fff,var(--steel-l));
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
.stat span{font-size:11.5px;color:var(--fg-dim)}
/* —— 右栏：软件窗口 —— */
.right{
  display:flex;flex-direction:column;align-items:center;justify-content:center;
  min-height:0;gap:10px;
}
.app-frame{
  height:100%;max-height:calc(100dvh - var(--topbar-h) - 118px);
  aspect-ratio:596/825;max-width:100%;
  background:var(--bg-dark);
  border:1px solid rgba(90,122,168,.3);
  border-radius:var(--radius);
  overflow:hidden;
  box-shadow:var(--shadow),0 0 0 1px rgba(0,0,0,.4) inset;
  display:flex;flex-direction:column;
}
.app-bar{
  flex:0 0 34px;display:flex;align-items:center;gap:7px;padding:0 13px;
  background:linear-gradient(180deg,#3A3A3A,#2E2E2E);
  border-bottom:1px solid rgba(0,0,0,.5);
}
.dot-r,.dot-y,.dot-g{width:10px;height:10px;border-radius:50%}
.dot-r{background:#E05C5C}
.dot-y{background:#E0B95C}
.dot-g{background:#5CC46A}
.app-title{margin-left:9px;font-size:11.5px;color:var(--fg-dim);font-weight:600}
.app-body{flex:1;min-height:0;background:var(--bg-deep)}
.app-viewport{height:100%;overflow:hidden}
.app-viewport img{
  width:100%;height:100%;object-fit:cover;object-position:top center;
  transition:opacity .26s ease;
}
.app-foot{
  flex:0 0 30px;display:flex;align-items:center;gap:8px;padding:0 13px;
  background:linear-gradient(180deg,#2E2E2E,#262626);
  border-top:1px solid rgba(0,0,0,.5);
  font-size:11px;color:var(--fg-muted);font-weight:600;
}
.live-dot{
  width:6px;height:6px;border-radius:50%;background:var(--gold);
  box-shadow:0 0 8px var(--gold);animation:pulse 2.2s infinite;flex-shrink:0;
}
/* 圆点指示器 */
.dots{display:flex;gap:9px;align-items:center;justify-content:center}
.dot{
  width:9px;height:9px;border-radius:50%;border:none;padding:0;cursor:pointer;
  background:rgba(90,122,168,.35);transition:.26s var(--ease);
}
.dot:hover{background:rgba(90,122,168,.65);transform:scale(1.15)}
.dot.active{
  width:26px;border-radius:5px;
  background:linear-gradient(90deg,var(--steel),var(--steel-glow));
  box-shadow:0 0 10px rgba(74,111,196,.6);
}
/* ===== 小屏：允许滚动（手机必须能滚） ===== */
@media(max-width:1024px){
  body{overflow:auto}
  .shell{height:auto;min-height:100dvh}
  .main{grid-template-columns:1fr;gap:26px;padding:20px 0 30px}
  .right{display:none} /* 手机端不显示大图，聚焦下载 */
  .feats{grid-template-columns:1fr 1fr}
}
/* ===== 移动端适配 ===== */
@media(max-width:820px){
  .shell{padding:0 16px}
  .topbar{flex-wrap:wrap;height:auto;flex:none;padding:12px 0;gap:6px}
  .brand{font-size:15px;gap:7px}
  .brand img{width:24px;height:24px}
  .brand-ver{font-size:10px;padding:1px 7px}
  .top-meta{font-size:11px;margin-left:auto}
  h1{font-size:27px}
  .desc{font-size:13.5px}
  .dl{flex-direction:column}
  .dl .btn{width:100%}
  .hero-stats{padding-top:14px}
  .stat b{font-size:21px}
  .stat span{font-size:10.5px}
  .footer{flex-direction:column;align-items:flex-start;gap:8px;font-size:11px}
  .copyright{white-space:normal;line-height:1.5}
}
@media(max-width:420px){
  .brand-ver{display:none}
  h1{font-size:24px}
  .feats{grid-template-columns:1fr}
}

/* ===== 底部栏：友情链接 + 版权 ===== */
.footer{
  flex:0 0 auto;
  display:flex;align-items:center;justify-content:space-between;
  gap:16px;flex-wrap:wrap;
  padding:clamp(8px,1.2vh,13px) 0;
  border-top:1px solid var(--line-soft);
  font-size:12px;color:var(--fg-dim);
}
.friend-links{display:flex;align-items:center;gap:14px;flex-wrap:wrap}
.fl-label{
  color:var(--fg-dim);font-weight:700;letter-spacing:.3px;
  padding-right:12px;border-right:1px solid var(--line-soft);
  cursor:default;
}
.friend-links a{
  color:var(--fg-muted);transition:.22s var(--ease);
  position:relative;
}
.friend-links a:hover{color:var(--steel-l)}
.friend-links a::after{
  content:"";position:absolute;left:0;bottom:-2px;width:0;height:1px;
  background:var(--steel-l);transition:width .24s var(--ease);
}
.friend-links a:hover::after{width:100%}
.copyright{color:var(--fg-dim);letter-spacing:.2px;white-space:nowrap}