/* ============================================================
   DSH Cyber 开源官网 · 主样式
   结构：变量 → 基础 → 背景 → 导航 → Hero → 区块 → 页脚 → 响应式
   ============================================================ */

/* ===== 设计变量 ===== */
:root{
  --bg:#0a0908;
  --bg-2:#12100c;
  --panel:#15120d;
  --panel-2:#1b1712;
  --line:rgba(240,177,80,.14);
  --line-strong:rgba(240,177,80,.4);
  --amber:#f0b150;
  --amber-deep:#d98f2b;
  --amber-soft:rgba(240,177,80,.1);
  --green:#5dd39e;
  --red:#e0705c;
  --text:#efe7da;
  --muted:#9a8f7d;
  --mono:ui-monospace,SFMono-Regular,Menlo,Consolas,"Courier New",monospace;
  --radius:14px;
}

/* ===== 基础 ===== */
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  background:var(--bg);
  color:var(--text);
  font-family:"PingFang SC","Microsoft YaHei","Segoe UI",system-ui,sans-serif;
  line-height:1.7;
  overflow-x:hidden;
}
::selection{background:rgba(240,177,80,.35)}
a{color:inherit;text-decoration:none}
img{display:block;max-width:100%}
.mono{font-family:var(--mono)}
.wrap{max-width:1180px;margin:0 auto;padding:0 24px}

/* ===== 背景氛围 ===== */
.bg-grid{
  position:fixed;inset:0;z-index:-2;pointer-events:none;
  background:
    linear-gradient(rgba(240,177,80,.035) 1px,transparent 1px),
    linear-gradient(90deg,rgba(240,177,80,.035) 1px,transparent 1px);
  background-size:44px 44px;
  mask-image:radial-gradient(ellipse 90% 70% at 50% 0%,#000 30%,transparent 100%);
  -webkit-mask-image:radial-gradient(ellipse 90% 70% at 50% 0%,#000 30%,transparent 100%);
}
.bg-glow{
  position:fixed;inset:0;z-index:-1;pointer-events:none;
  background:
    radial-gradient(640px 340px at 12% -6%,rgba(240,177,80,.12),transparent 70%),
    radial-gradient(720px 380px at 88% 0%,rgba(224,112,92,.09),transparent 70%),
    radial-gradient(900px 520px at 50% 112%,rgba(240,177,80,.06),transparent 70%);
}

/* ===== 导航 ===== */
header{
  position:fixed;top:0;left:0;right:0;z-index:50;
  background:rgba(10,9,8,.82);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line);
}
.nav{display:flex;align-items:center;gap:28px;height:64px}
.logo{display:flex;align-items:center;gap:10px;font-weight:700}
.logo-cube{
  width:34px;height:34px;border-radius:9px;flex:none;
  display:flex;align-items:center;justify-content:center;
  background:linear-gradient(135deg,rgba(240,177,80,.28),rgba(217,143,43,.16));
  border:1px solid var(--line-strong);
  box-shadow:0 0 18px rgba(240,177,80,.3);
}
.logo-cube svg{width:18px;height:18px}
.logo small{display:block;font-size:10px;letter-spacing:.28em;color:var(--amber);font-weight:600}
.logo b{font-size:16px;letter-spacing:.06em}
.nav-links{display:flex;gap:6px;margin-left:auto}
.nav-links a{
  padding:7px 14px;border-radius:8px;font-size:14px;color:var(--muted);
  transition:color .2s,background .2s;
}
.nav-links a:hover{color:var(--text);background:var(--amber-soft)}
.nav-links a.active{color:var(--amber);background:var(--amber-soft)}
.nav-cta{
  display:flex;align-items:center;gap:8px;padding:8px 16px;border-radius:9px;
  border:1px solid var(--line-strong);font-size:13.5px;font-weight:600;
  background:linear-gradient(135deg,rgba(240,177,80,.16),rgba(217,143,43,.1));
  transition:box-shadow .2s,transform .2s;white-space:nowrap;
}
.nav-cta:hover{box-shadow:0 0 20px rgba(240,177,80,.35);transform:translateY(-1px)}
.menu-btn{display:none;margin-left:auto;background:none;border:1px solid var(--line);border-radius:8px;color:var(--text);width:40px;height:40px;font-size:18px;cursor:pointer}

/* ===== Hero ===== */
.hero{padding:150px 0 70px;text-align:center;position:relative}
.hero-badge{
  display:inline-flex;align-items:center;gap:8px;
  font-family:var(--mono);font-size:12px;letter-spacing:.22em;color:var(--amber);
  border:1px solid var(--line-strong);border-radius:999px;padding:6px 16px;
  background:var(--amber-soft);margin-bottom:26px;
}
.hero-badge .dot{width:7px;height:7px;border-radius:50%;background:var(--green);box-shadow:0 0 10px var(--green);animation:pulse 1.6s infinite}
@keyframes pulse{50%{opacity:.35}}
.hero h1{
  font-size:clamp(42px,7vw,78px);font-weight:800;letter-spacing:.04em;line-height:1.12;
  background:linear-gradient(100deg,#f7d9a0 8%,#f0b150 38%,#d98f2b 68%,#e0705c 96%);
  -webkit-background-clip:text;background-clip:text;color:transparent;
  filter:drop-shadow(0 0 26px rgba(240,177,80,.28));
}
.hero h1 .en{display:block;font-family:var(--mono);font-size:clamp(13px,1.9vw,19px);letter-spacing:.5em;color:var(--muted);-webkit-text-fill-color:var(--muted);background:none;margin-top:12px;font-weight:500}
.hero p.lead{max-width:700px;margin:26px auto 0;color:var(--muted);font-size:clamp(15px,1.6vw,17.5px)}
.hero p.lead b{color:var(--text);font-weight:600}
.hero-ctas{display:flex;gap:14px;justify-content:center;margin-top:36px;flex-wrap:wrap}
.btn{
  display:inline-flex;align-items:center;gap:8px;padding:13px 28px;border-radius:11px;
  font-size:15px;font-weight:700;cursor:pointer;border:none;
  transition:transform .2s,box-shadow .2s;
}
.btn-primary{
  color:#221503;
  background:linear-gradient(135deg,#f0b150,#f7d9a0);
  box-shadow:0 0 26px rgba(240,177,80,.35);
}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 0 40px rgba(240,177,80,.5)}
.btn-ghost{color:var(--text);background:transparent;border:1px solid var(--line-strong)}
.btn-ghost:hover{background:var(--amber-soft);transform:translateY(-2px)}

/* 数据条 */
.stats{margin-top:64px;display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
.stat{
  background:linear-gradient(180deg,var(--panel-2),var(--panel));
  border:1px solid var(--line);border-radius:var(--radius);padding:22px 12px;
  transition:border-color .25s,transform .25s,box-shadow .25s;
}
.stat:hover{border-color:var(--line-strong);transform:translateY(-3px);box-shadow:0 8px 30px rgba(240,177,80,.1)}
.stat .num{font-family:var(--mono);font-size:34px;font-weight:700;color:var(--amber)}
.stat:nth-child(2) .num{color:#f7d9a0}
.stat:nth-child(3) .num{color:var(--green)}
.stat:nth-child(4) .num{color:var(--red)}
.stat .label{font-size:13px;color:var(--muted);margin-top:4px}

/* ===== 通用区块 ===== */
section{padding:90px 0 0}
.sec-head{margin-bottom:44px}
.sec-kicker{font-family:var(--mono);font-size:12px;letter-spacing:.3em;color:var(--amber);margin-bottom:12px}
.sec-head h2{font-size:clamp(26px,3.6vw,38px);font-weight:800;letter-spacing:.02em}
.sec-head p{color:var(--muted);margin-top:12px;max-width:660px}

/* ===== 世界展示 ===== */
.world-tabs{display:flex;gap:10px;margin-bottom:22px;flex-wrap:wrap;align-items:center}
.world-tab{
  padding:10px 22px;border-radius:10px;cursor:pointer;font-size:14.5px;font-weight:600;
  color:var(--muted);background:var(--panel);border:1px solid var(--line);
  transition:all .25s;
}
.world-tab:hover{color:var(--text);border-color:var(--line-strong)}
.world-tab.active{
  color:#221503;background:linear-gradient(135deg,#f0b150,#f7d9a0);
  border-color:transparent;box-shadow:0 0 22px rgba(240,177,80,.35);
}
/* 规划中的世界：虚线占位按钮 */
.world-tab.soon{
  border-style:dashed;background:transparent;color:var(--muted);cursor:pointer;
}
.world-tab.soon .soon-tag{
  display:inline-block;margin-left:8px;padding:1px 8px;border-radius:999px;
  font-family:var(--mono);font-size:10px;letter-spacing:.12em;
  color:var(--amber-deep);border:1px solid rgba(217,143,43,.45);vertical-align:1px;
}
.world-more-note{
  font-size:13px;color:var(--muted);padding:10px 4px;
}
.world-more-note b{color:var(--amber)}
.shot-frame{
  position:relative;border-radius:16px;padding:10px;
  background:linear-gradient(160deg,rgba(240,177,80,.4),rgba(217,143,43,.22),rgba(224,112,92,.25));
  box-shadow:0 0 60px rgba(240,177,80,.14),0 24px 60px rgba(0,0,0,.55);
}
.shot-frame .inner{border-radius:10px;overflow:hidden;background:#0d0b08;aspect-ratio:16/9;position:relative}
.shot-frame img{width:100%;height:100%;object-fit:cover;object-position:top center;transition:opacity .45s}
.shot-fallback{
  position:absolute;inset:0;display:none;align-items:center;justify-content:center;flex-direction:column;gap:10px;
  background:linear-gradient(140deg,#1a140c,#241410);color:var(--muted);font-size:14px;
}
.shot-frame .scanline{
  position:absolute;inset:10px;border-radius:10px;pointer-events:none;
  background:linear-gradient(180deg,transparent 0%,rgba(240,177,80,.07) 50%,transparent 100%);
  background-size:100% 220px;background-repeat:no-repeat;
  animation:scan 5s linear infinite;
}
@keyframes scan{from{background-position:0 -220px}to{background-position:0 120%}}
.world-desc{display:flex;gap:26px;flex-wrap:wrap;margin-top:22px}
.wd-item{
  flex:1 1 240px;display:flex;gap:12px;align-items:flex-start;padding:16px 18px;border-radius:12px;
  background:var(--panel);border:1px solid var(--line);transition:border-color .25s,transform .25s;
}
.wd-item:hover{border-color:var(--line-strong);transform:translateY(-3px)}
.wd-item.soon-card{border-style:dashed}
.wd-item .ico{flex:none;font-size:20px;line-height:1.4}
.wd-item h4{font-size:14.5px;margin-bottom:3px}
.wd-item p{font-size:12.8px;color:var(--muted)}

/* ===== 功能卡片 ===== */
.features-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.feature{
  position:relative;padding:26px 22px;border-radius:var(--radius);overflow:hidden;
  background:linear-gradient(180deg,var(--panel-2),var(--panel));
  border:1px solid var(--line);
  transition:transform .25s,border-color .25s,box-shadow .25s;
}
.feature::before{
  content:"";position:absolute;top:0;left:0;right:0;height:2px;
  background:linear-gradient(90deg,transparent,var(--amber),transparent);
  opacity:0;transition:opacity .25s;
}
.feature:hover{transform:translateY(-5px);border-color:var(--line-strong);box-shadow:0 14px 40px rgba(240,177,80,.12)}
.feature:hover::before{opacity:1}
.feature .f-ico{
  width:46px;height:46px;border-radius:12px;display:flex;align-items:center;justify-content:center;
  font-size:22px;margin-bottom:16px;
  background:linear-gradient(135deg,rgba(240,177,80,.2),rgba(224,112,92,.14));
  border:1px solid var(--line-strong);
}
.feature h3{font-size:17px;margin-bottom:8px}
.feature p{font-size:13.5px;color:var(--muted)}
.feature .tag{
  position:absolute;top:20px;right:18px;font-family:var(--mono);font-size:10px;
  letter-spacing:.18em;color:var(--amber-deep);border:1px solid rgba(217,143,43,.45);
  border-radius:5px;padding:2px 7px;
}

/* 隐私条 */
.privacy{margin-top:26px;display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
.pv{
  padding:18px;border-radius:12px;text-align:center;font-size:13px;color:var(--muted);
  background:rgba(93,211,158,.06);border:1px solid rgba(93,211,158,.25);
}
.pv b{display:block;color:var(--green);font-size:14px;margin-bottom:4px}

/* ===== 开源方案 ===== */
.os-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.os-card{padding:26px;border-radius:var(--radius);background:var(--panel);border:1px solid var(--line)}
.os-card h3{font-size:17px;margin-bottom:16px;display:flex;align-items:center;gap:10px}
.os-card h3 .bar{width:4px;height:18px;border-radius:2px;background:linear-gradient(180deg,var(--amber),var(--red))}
.tree{font-family:var(--mono);font-size:13px;line-height:2.05;color:var(--muted)}
.tree b{color:var(--amber);font-weight:600}
.tree .dir{color:#f7d9a0}
.steps{display:flex;flex-direction:column}
.step{display:flex;gap:14px;position:relative;padding-bottom:22px}
.step:last-child{padding-bottom:0}
.step::before{content:"";position:absolute;left:15px;top:34px;bottom:2px;width:1px;background:var(--line-strong)}
.step:last-child::before{display:none}
.step .n{
  flex:none;width:31px;height:31px;border-radius:50%;display:flex;align-items:center;justify-content:center;
  font-family:var(--mono);font-size:13px;color:var(--amber);
  border:1px solid var(--line-strong);background:var(--amber-soft);
}
.step h5{font-size:14.5px;margin:4px 0 2px}
.step p{font-size:13px;color:var(--muted)}
.license-line{
  display:flex;align-items:center;gap:12px;margin-top:18px;padding:14px 18px;border-radius:10px;
  background:rgba(224,112,92,.08);border:1px solid rgba(224,112,92,.35);font-size:13.5px;flex-wrap:wrap;
}
.license-line .mono{color:var(--red);font-weight:700}
.roadmap{margin-top:18px;display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
.rm{
  padding:18px 16px;border-radius:12px;background:var(--panel-2);border:1px solid var(--line);
  transition:border-color .25s,transform .25s;
}
.rm:hover{border-color:var(--line-strong);transform:translateY(-3px)}
.rm .q{font-family:var(--mono);font-size:11px;letter-spacing:.2em;color:var(--amber-deep)}
.rm h5{font-size:14.5px;margin:8px 0 4px}
.rm p{font-size:12.5px;color:var(--muted)}
.rm .st{display:inline-block;margin-top:10px;font-size:11px;padding:2px 10px;border-radius:999px;border:1px solid var(--line-strong);color:var(--amber)}
.rm .st.plan{border-color:rgba(93,211,158,.4);color:var(--green)}

/* ===== 快速开始 ===== */
.qs-box{
  border-radius:16px;overflow:hidden;border:1px solid var(--line-strong);
  background:#0d0b08;box-shadow:0 0 50px rgba(240,177,80,.1);
}
.qs-bar{display:flex;align-items:center;gap:8px;padding:12px 18px;background:var(--panel-2);border-bottom:1px solid var(--line)}
.qs-bar .dot-r{width:11px;height:11px;border-radius:50%}
.qs-bar .t{margin-left:10px;font-family:var(--mono);font-size:12px;color:var(--muted);letter-spacing:.12em}
.qs-body{padding:26px 26px 22px;position:relative}
.qs-body pre{font-family:var(--mono);font-size:13.5px;line-height:2.1;color:#e8dcc3;overflow-x:auto}
.qs-body pre .c{color:#6b5f4b}
.qs-body pre .g{color:var(--green)}
.copy-btn{
  position:absolute;top:16px;right:16px;padding:7px 14px;border-radius:8px;cursor:pointer;
  font-size:12.5px;font-weight:600;color:var(--amber);
  background:var(--amber-soft);border:1px solid var(--line-strong);
  transition:background .2s,color .2s;
}
.copy-btn:hover{background:rgba(240,177,80,.25)}
.copy-btn.ok{color:#221503;background:var(--green);border-color:var(--green)}
.qs-reqs{display:flex;gap:22px;flex-wrap:wrap;padding:16px 26px;border-top:1px solid var(--line);font-size:13px;color:var(--muted)}
.qs-reqs b{color:var(--text)}

/* ===== 生态与社区 ===== */
.comm-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:14px}
.comm{
  padding:22px 14px;border-radius:var(--radius);text-align:center;
  background:var(--panel);border:1px solid var(--line);
  transition:transform .25s,border-color .25s,box-shadow .25s;
}
.comm:hover{transform:translateY(-5px);border-color:var(--line-strong);box-shadow:0 12px 34px rgba(240,177,80,.12)}
.comm .c-ico{font-size:24px;margin-bottom:10px}
.comm h4{font-size:14px;margin-bottom:5px}
.comm p{font-size:12px;color:var(--muted)}
.contrib-note{
  margin-top:26px;padding:22px 26px;border-radius:var(--radius);
  background:var(--panel);border:1px solid var(--line);
  display:flex;gap:18px;align-items:center;flex-wrap:wrap;font-size:13.5px;color:var(--muted);
}
.contrib-note .mono{color:var(--amber)}
.contrib-note a{color:var(--amber);border-bottom:1px dashed var(--line-strong)}
.contrib-note a:hover{border-bottom-style:solid}

/* ===== 页脚 ===== */
footer{margin-top:100px;border-top:1px solid var(--line);padding:36px 0;background:rgba(13,11,8,.6)}
.foot{display:flex;align-items:center;gap:20px;flex-wrap:wrap;font-size:13px;color:var(--muted)}
.foot .links{margin-left:auto;display:flex;gap:18px}
.foot a:hover{color:var(--amber)}

/* ===== 入场动画（渐进增强：仅 JS 可用时隐藏初始状态） ===== */
html.js .reveal{opacity:0;transform:translateY(26px);transition:opacity .7s ease,transform .7s ease}
html.js .reveal.in{opacity:1;transform:none}

/* ===== 轻提示 ===== */
.toast{
  position:fixed;left:50%;bottom:36px;transform:translate(-50%,20px);
  padding:10px 22px;border-radius:10px;font-size:13.5px;z-index:99;
  color:var(--text);background:rgba(27,23,18,.95);border:1px solid var(--line-strong);
  box-shadow:0 8px 30px rgba(0,0,0,.5);
  opacity:0;pointer-events:none;transition:opacity .3s,transform .3s;
}
.toast.show{opacity:1;transform:translate(-50%,0)}

/* ===== 响应式 ===== */
@media (max-width:960px){
  .features-grid{grid-template-columns:repeat(2,1fr)}
  .os-grid{grid-template-columns:1fr}
  .comm-grid{grid-template-columns:repeat(3,1fr)}
  .stats{grid-template-columns:repeat(2,1fr)}
  .privacy{grid-template-columns:repeat(2,1fr)}
  .roadmap{grid-template-columns:1fr}
}
@media (max-width:640px){
  .nav-links{
    display:none;position:absolute;top:64px;left:0;right:0;flex-direction:column;
    background:rgba(10,9,8,.97);border-bottom:1px solid var(--line);padding:14px 20px;
  }
  .nav-links.open{display:flex}
  .menu-btn{display:block}
  .nav-cta{display:none}
  .features-grid{grid-template-columns:1fr}
  .comm-grid{grid-template-columns:repeat(2,1fr)}
  .privacy{grid-template-columns:1fr}
  .hero{padding-top:120px}
}