/* 重生linkkitt 安全中心 · SENTINEL-X 专业视觉 */
:root{--bg:#0a0e12;--panel:#111820;--panel2:#0d141c;--line:#1d2833;--neon:#00ff88;--neon-glow:rgba(0,255,136,.35);--cyan:#00e8c8;--red:#ff3355;--amber:#ffbd2e;--txt:#c8d6e2;--dim:#5c7285;--mono:Consolas,"Cascadia Mono",Menlo,monospace}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{background:var(--bg);color:var(--txt);font-family:var(--mono);font-size:15px;line-height:1.75;overflow-x:hidden}
.container{max-width:1100px;margin:0 auto;padding:0 24px}
a{color:var(--cyan);text-decoration:none}
.grid-bg{position:fixed;inset:0;z-index:0;pointer-events:none;background:
  linear-gradient(rgba(0,255,136,.035) 1px,transparent 1px),
  linear-gradient(90deg,rgba(0,255,136,.035) 1px,transparent 1px);
  background-size:44px 44px;mask-image:radial-gradient(ellipse at 50% 0,#000 30%,transparent 75%)}
.scanline{position:fixed;inset:0;pointer-events:none;z-index:999;background:repeating-linear-gradient(0deg,rgba(255,255,255,.018) 0 1px,transparent 1px 3px);mix-blend-mode:overlay}

/* 顶栏 */
.topbar{border-bottom:1px solid var(--line);background:rgba(10,14,18,.9);position:sticky;top:0;z-index:50;backdrop-filter:blur(8px)}
.topbar-inner{display:flex;align-items:center;justify-content:space-between;height:62px}
.brand{color:#fff;font-weight:800;font-size:17px;letter-spacing:.5px}
.brand em{font-style:normal;color:var(--neon);font-size:13px;margin-left:8px;letter-spacing:.5px}
.brand-mark{color:#04231a;background:linear-gradient(135deg,var(--neon),var(--cyan));padding:2px 8px;border-radius:6px;margin-right:6px;font-weight:800}
.nav a{color:var(--txt);margin-left:24px;font-size:14px;opacity:.85;transition:.2s}
.nav a:hover{color:var(--neon);opacity:1;text-shadow:0 0 12px var(--neon-glow)}

/* Hero */
.hero{padding:88px 0 60px;position:relative;z-index:1;text-align:center}
.badge{display:inline-block;border:1px solid rgba(0,255,136,.3);color:var(--neon);padding:6px 16px;border-radius:999px;font-size:12.5px;letter-spacing:2px;margin-bottom:22px;background:rgba(0,255,136,.05)}
.hero-title{color:#fff;font-size:clamp(30px,5.6vw,50px);font-weight:800;line-height:1.18;margin-bottom:16px;letter-spacing:1px}
.highlight{background:linear-gradient(135deg,var(--neon),var(--cyan));-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;filter:drop-shadow(0 0 22px var(--neon-glow))}
.hero-sub{color:var(--dim);font-size:16.5px;max-width:660px;margin:0 auto 28px}
.cta{display:flex;gap:16px;justify-content:center;margin:0 0 30px;flex-wrap:wrap}
.btn{display:inline-block;padding:13px 30px;border-radius:8px;font-family:var(--mono);font-size:15px;font-weight:700;cursor:pointer;border:1px solid transparent;transition:.25s}
.btn.primary{background:linear-gradient(135deg,var(--neon),#00d98f);color:#04231a;box-shadow:0 4px 24px var(--neon-glow)}
.btn.primary:hover{transform:translateY(-2px);box-shadow:0 8px 34px var(--neon-glow)}
.btn.ghost{background:rgba(0,232,200,.06);color:var(--cyan);border-color:rgba(0,232,200,.4)}
.btn.ghost:hover{border-color:var(--cyan);box-shadow:0 0 22px rgba(0,232,200,.25);transform:translateY(-2px)}
.terminal{margin:0 auto;max-width:760px;border:1px solid var(--line);border-radius:12px;background:var(--panel);overflow:hidden;box-shadow:0 0 60px rgba(0,255,136,.07);text-align:left}
.terminal-head{display:flex;align-items:center;gap:8px;padding:11px 16px;background:var(--panel2);border-bottom:1px solid var(--line)}
.dot{width:11px;height:11px;border-radius:50%}.dot.r{background:#ff5f56}.dot.y{background:#ffbd2e}.dot.g{background:#27c93f}
.t-title{margin-left:10px;color:var(--dim);font-size:12px;letter-spacing:.5px}
.terminal-body{padding:18px 22px;font-size:14px;color:var(--txt)}
.tk{color:var(--cyan);font-weight:700}
.ok{color:var(--neon)}
.dim{color:var(--dim)}
.blink{animation:blink 1s steps(1) infinite;color:var(--neon)}
@keyframes blink{50%{opacity:0}}
.notice{border:1px solid var(--line);background:var(--panel2);padding:10px 18px;border-radius:8px;color:var(--dim);font-size:13px;margin-top:26px;display:inline-block}

/* 区块 */
.section{padding:64px 0;position:relative;z-index:1}
.section.dark{background:var(--panel2);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.sec-title{color:#fff;font-size:28px;margin-bottom:6px;letter-spacing:1px}
.sec-sub{color:var(--dim);margin-bottom:36px;font-size:14px;letter-spacing:.5px}
.grid6{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.grid5{display:grid;grid-template-columns:repeat(5,1fr);gap:16px}
.grid2{display:grid;grid-template-columns:1fr 1fr;gap:20px}
@media(max-width:1100px){.grid5{grid-template-columns:repeat(3,1fr)}}
@media(max-width:860px){.grid6,.grid5,.grid2{grid-template-columns:1fr}.hero-title{font-size:30px}}
.card{background:linear-gradient(160deg,var(--panel),#0e141c);border:1px solid var(--line);border-radius:12px;padding:24px;transition:.25s;position:relative;overflow:hidden}
.card::before{content:'';position:absolute;inset:0;background:linear-gradient(160deg,transparent 40%,rgba(0,255,136,.05));pointer-events:none}
.card:hover{border-color:rgba(0,255,136,.5);transform:translateY(-4px);box-shadow:0 10px 36px rgba(0,255,136,.09)}
.card-idx{color:var(--cyan);font-size:13px;margin-bottom:12px;opacity:.85;letter-spacing:1px}
.card h3{color:#fff;font-size:16.5px;margin-bottom:8px}
.card p{color:var(--dim);font-size:13.5px}
.card.plat ul{list-style:none;margin:14px 0 20px}
.card.plat li::before{content:"> ";color:var(--neon);font-weight:700}
.card.plat .btn{width:100%;text-align:center}

/* 流程 */
.flow{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
@media(max-width:860px){.flow{grid-template-columns:1fr 1fr}}
.step{border:1px solid var(--line);border-radius:12px;padding:22px;background:linear-gradient(160deg,var(--panel),#0e141c);position:relative}
.step span{color:var(--neon);font-size:24px;font-weight:800;text-shadow:0 0 14px var(--neon-glow)}
.step h4{color:#fff;margin:12px 0 6px;font-size:15px}
.step p{color:var(--dim);font-size:13px}

/* 统计 */
.stats{border-top:1px solid var(--line);border-bottom:1px solid var(--line);background:linear-gradient(90deg,var(--panel),var(--panel2))}
.stats-row{display:flex;justify-content:space-around;padding:38px 0;gap:20px;flex-wrap:wrap}
.stat{text-align:center}
.stat b{display:block;color:var(--neon);font-size:36px;letter-spacing:1px;text-shadow:0 0 20px var(--neon-glow)}
.stat span{color:var(--dim);font-size:14px;letter-spacing:.5px}

/* 联系 */
.about-p{max-width:720px;color:var(--dim);margin-bottom:28px}
.contact{display:flex;align-items:center;gap:22px;flex-wrap:wrap}
.email-box{border:1px solid rgba(0,255,136,.35);background:rgba(0,255,136,.06);color:var(--neon);padding:16px 26px;border-radius:10px;font-size:17px;font-weight:700;letter-spacing:.5px;box-shadow:0 0 26px rgba(0,255,136,.12)}
.contact-tags{display:flex;gap:12px;flex-wrap:wrap}
.tag{border:1px solid var(--line);background:var(--panel);padding:10px 18px;border-radius:8px;color:var(--txt);font-size:13.5px}
.tag:hover{border-color:var(--neon);color:var(--neon)}

/* 开源声明 */
.statement{max-width:860px;background:var(--panel);border:1px solid rgba(0,255,136,.22);border-radius:14px;padding:26px 30px;color:var(--txt);font-size:14.5px;line-height:2;box-shadow:0 0 40px rgba(0,255,136,.05)}
.statement p{white-space:pre-wrap}
.statement b{color:var(--neon)}

/* 下载中心大按钮 */
.btn-big{width:100%;padding:16px 10px;font-size:16px;text-align:center;display:block;box-sizing:border-box;letter-spacing:1px}
.card.plat .btn-big{margin-top:14px}
.cta{display:flex;gap:16px;flex-wrap:wrap;margin-top:28px}
.cta .btn-big{flex:1;min-width:220px}

/* 页脚 */
.footer{border-top:1px solid var(--line);padding:32px 0;color:var(--dim);font-size:13px;text-align:center;position:relative;z-index:1}
.foot-tech{color:#3d5568;font-size:12px;margin-bottom:10px;letter-spacing:.5px}
.foot-line{color:var(--txt);margin-bottom:6px}
.foot-mini{margin-top:4px;color:#3d5568;font-size:12px}
.foot-mini b{color:var(--neon)}

/* 后台 */
.admin-nav{display:flex;gap:10px;margin:26px 0}
.admin-nav a{border:1px solid var(--line);padding:8px 18px;border-radius:8px;color:var(--txt);font-size:14px}
.admin-nav a.on{color:#04231a;background:linear-gradient(135deg,var(--neon),var(--cyan));font-weight:700}
.hint{color:var(--dim);font-size:13px;margin-top:18px}
.form fieldset{border:1px solid var(--line);border-radius:12px;padding:20px 22px;margin-bottom:20px;background:var(--panel)}
.form legend{color:var(--cyan);font-size:14px;padding:0 8px;letter-spacing:.5px}
.frow{display:block;margin-bottom:12px}
.frow span{display:block;color:var(--dim);font-size:12.5px;margin-bottom:4px}
.frow input{width:100%;background:var(--panel2);border:1px solid var(--line);border-radius:8px;color:var(--txt);padding:10px 12px;font-family:var(--mono);font-size:14px}
.frow input:focus{outline:none;border-color:var(--neon);box-shadow:0 0 12px rgba(0,255,136,.15)}

/* 登录 */
.login-wrap{min-height:100vh;display:flex;align-items:center;justify-content:center}
.login-box{border:1px solid var(--line);background:var(--panel);border-radius:14px;padding:38px 42px;width:380px;max-width:92vw;box-shadow:0 0 70px rgba(0,255,136,.08)}
.login-brand{color:#fff;font-size:18px;font-weight:800;margin-bottom:26px;letter-spacing:.5px}
.login-brand .brand-mark{margin-right:8px}
.login-box .btn{width:100%;margin-top:8px}