:root{--red:#E30019;--ink:#111;--ink2:#555;--mute:#999;--line:#ececec;--bg:#fff;--soft:#fafafa}
*{box-sizing:border-box;margin:0;padding:0}
html,body{background:var(--bg)}
body{font-family:'Helvetica Neue','Segoe UI','PingFang SC','Microsoft YaHei',sans-serif;color:#1a1a1a;min-height:100vh;-webkit-font-smoothing:antialiased}
a{color:inherit}
.grid-bg{position:fixed;inset:0;background-image:linear-gradient(to right,#EFEFEF 1px,transparent 1px),linear-gradient(to bottom,#EFEFEF 1px,transparent 1px);background-size:80px 80px;opacity:.5;pointer-events:none;z-index:0}
.container{position:relative;z-index:1;max-width:1400px;margin:0 auto;padding:40px 32px}
.brand{display:flex;align-items:center;gap:14px}
.brand img{width:48px;height:48px;border-radius:12px;display:block}
.brand-tag{font-size:10px;letter-spacing:.3em;color:var(--mute);margin-bottom:6px;font-weight:500}
.brand h1{display:inline-block;font-size:28px;font-weight:300;letter-spacing:-.01em;line-height:1;color:var(--ink)}
.brand h1 b{font-weight:700}
.accent{width:32px;height:2px;background:var(--red);display:inline-block;vertical-align:middle;margin-left:8px}
header.top{display:flex;align-items:flex-end;justify-content:space-between;margin-bottom:28px;padding-bottom:20px;border-bottom:1px solid var(--line);flex-wrap:wrap;gap:16px}
.who{display:flex;align-items:center;gap:10px;font-size:12px;color:var(--ink2)}
.chip{display:inline-flex;align-items:center;gap:6px;text-decoration:none;color:var(--mute);letter-spacing:.05em;font-size:11px;padding:5px 10px;border:1px solid var(--line);background:#fff;transition:all .2s;cursor:pointer;font-family:inherit}
.chip:hover{border-color:#1a1a1a;color:#1a1a1a}
.chip.red{border-color:var(--red);color:var(--red)}
.group-title{font-size:11px;letter-spacing:.2em;color:var(--mute);margin:28px 0 12px;font-weight:500}
.services{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:16px}
@media (min-width:1400px){.services{grid-template-columns:repeat(5,1fr)}}
.service{display:block;padding:24px 20px;background:#fff;border:1px solid var(--line);text-decoration:none;color:inherit;transition:all .2s ease;position:relative;overflow:hidden}
.service::before{content:'';position:absolute;top:0;left:0;width:0;height:2px;background:var(--red);transition:width .3s ease}
.service:hover{border-color:var(--red);transform:translateY(-2px);box-shadow:0 4px 12px rgba(0,0,0,.04)}
.service:hover::before{width:100%}
.service-icon{font-size:32px;line-height:1;margin-bottom:14px;display:block}
.service-name{font-size:16px;font-weight:600;color:var(--ink);margin-bottom:6px;letter-spacing:-.01em}
.service-url{font-size:11px;color:var(--mute);font-family:'SF Mono','Cascadia Code',Consolas,monospace;margin-bottom:10px;word-break:break-all}
.service-desc{font-size:12px;color:var(--ink2);line-height:1.5}
.badge{position:absolute;top:14px;right:14px;font-size:10px;font-weight:500;letter-spacing:.05em;padding:3px 8px;border-radius:10px;line-height:1.2}
.badge.live{background:#dcfce7;color:#16a34a}.badge.beta{background:#fef3c7;color:#d97706}.badge.dev{background:#e5e7eb;color:#6b7280}.badge.test{background:#ede9fe;color:#7c3aed}.badge.lock{background:#f3f4f6;color:#9ca3af}
.service.locked{background:var(--soft);cursor:default}
.service.locked .service-icon,.service.locked .service-name,.service.locked .service-desc{opacity:.45}
.service.locked:hover{border-color:var(--line);transform:none;box-shadow:none}
.service.locked:hover::before{width:0}
.empty{padding:40px 0;color:var(--ink2);font-size:13px}
footer{margin-top:48px;padding-top:20px;border-top:1px solid var(--line);text-align:center;font-size:11px;color:var(--mute);letter-spacing:.05em}

/* 登录 / 提示页 */
.center{position:relative;z-index:1;min-height:100vh;display:flex;align-items:center;justify-content:center;padding:32px 16px}
.card{background:#fff;border:1px solid var(--line);width:100%;max-width:400px;padding:40px 32px 32px;text-align:center;position:relative}
.card::before{content:'';position:absolute;top:0;left:0;right:0;height:2px;background:var(--red)}
.card .logo{width:88px;height:88px;border-radius:22px;display:block;margin:0 auto 18px}
.card h2{font-size:24px;font-weight:400;letter-spacing:.01em;color:var(--ink);margin-bottom:6px}
.card .tagline{font-size:10px;letter-spacing:.3em;color:var(--mute);margin-bottom:24px}
.card p{font-size:13.5px;color:var(--ink2);line-height:1.75;margin:8px 0}
.qr-wrap{margin:8px auto 4px;width:280px;min-height:280px;display:flex;align-items:center;justify-content:center}
#qr iframe{width:280px!important;height:280px!important;border:0}
.qr-state{font-size:12px;color:var(--mute)}
.hint{font-size:12px;color:var(--mute);margin-top:14px;line-height:1.7}
.btn{display:inline-block;margin-top:18px;padding:10px 22px;background:var(--red);color:#fff;text-decoration:none;font-size:13px;letter-spacing:.05em;border:0;cursor:pointer;font-family:inherit}
.btn:hover{background:#c40016}
.btn.ghost{background:#fff;color:var(--ink);border:1px solid var(--line)}
.btn.ghost:hover{border-color:#1a1a1a}
.uid{display:inline-block;font-family:'Cascadia Code',Consolas,monospace;background:#f3f3f3;padding:4px 10px;color:#333;font-size:13px;margin-top:4px;user-select:all}
.notice{font-size:12px;padding:8px 12px;background:#fef2f2;color:#b91c1c;margin-bottom:12px}
.notice.ok{background:#f0fdf4;color:#15803d}
@media (max-width:480px){.container{padding:24px 16px}.card{padding:32px 20px 24px}.brand h1{font-size:22px}}

/* ── AI Lab 品牌区(门户横幅 / 登录页左栏共用同一套红色渐变, 与 logo 一致) ── */
.hero,.login-brand{
  position:relative;color:#fff;overflow:hidden;
  background:
    radial-gradient(520px 260px at 84% 18%, rgba(255,255,255,.20), transparent 70%),
    linear-gradient(135deg,#FF2A3D 0%,#E30019 55%,#A80014 100%);
}
.hero::before,.login-brand::before{
  content:'';position:absolute;inset:0;pointer-events:none;
  background-image:linear-gradient(to right,rgba(255,255,255,.08) 1px,transparent 1px),
                   linear-gradient(to bottom,rgba(255,255,255,.08) 1px,transparent 1px);
  background-size:36px 36px;
  -webkit-mask-image:linear-gradient(115deg,transparent 30%,#000 90%);mask-image:linear-gradient(115deg,transparent 30%,#000 90%);
}
.hero::after,.login-brand::after{   /* 右侧一颗大火花, 呼应 logo */
  content:'';position:absolute;right:-40px;top:-50px;width:300px;height:300px;opacity:.10;pointer-events:none;
  background:no-repeat center/contain url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='-100 -100 200 200'%3E%3Cpath fill='%23fff' d='M0,-100 Q14,-14 100,0 Q14,14 0,100 Q-14,14 -100,0 Q-14,-14 0,-100Z'/%3E%3C/svg%3E");
}
.hero{z-index:1}
.hero-inner{position:relative;z-index:1;max-width:1400px;margin:0 auto;padding:34px 32px 10px;
  display:flex;align-items:center;justify-content:space-between;gap:24px;flex-wrap:wrap}
.hero-brand{display:flex;align-items:center;gap:22px}
.hero-mark{height:72px;width:auto;display:block;filter:drop-shadow(0 6px 16px rgba(80,0,10,.25))}
.hero-title{font-family:'Bahnschrift','Segoe UI',sans-serif;font-size:44px;font-weight:300;line-height:1;letter-spacing:.01em}
.hero-title b,.login-title b{font-weight:700}
.hero-tag{font-size:11px;letter-spacing:.32em;opacity:.82;margin-top:10px}
.hero-user{text-align:right}
.hello{font-size:15px;margin-bottom:10px}
.hero-actions{display:flex;gap:8px;justify-content:flex-end}
.chip-w{font-size:12px;color:#fff;text-decoration:none;padding:6px 14px;border:1px solid rgba(255,255,255,.55);border-radius:999px;transition:all .2s}
.chip-w:hover{background:#fff;color:var(--red)}
.hero-sub{position:relative;z-index:1;max-width:1400px;margin:0 auto;padding:4px 32px 24px;font-size:13px;opacity:.88}
.hero + .container{padding-top:8px}

/* ── 门户卡片 ── */
.section-title{font-size:12px;letter-spacing:.2em;color:#888;margin:28px 0 14px;font-weight:600}
.section-title span{font-weight:400;letter-spacing:.05em;margin-left:6px;color:#bbb}
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:16px}
.grid-sm{grid-template-columns:repeat(auto-fill,minmax(230px,1fr))}
.card-p{display:flex;flex-direction:column;background:#fff;border:1px solid var(--line);border-radius:14px;padding:20px;
  text-decoration:none;color:inherit;position:relative;overflow:hidden;transition:transform .2s,box-shadow .2s,border-color .2s}
.card-p::before{content:'';position:absolute;left:0;top:0;height:3px;width:0;background:linear-gradient(90deg,#FF2A3D,#E30019);transition:width .3s}
.card-p:hover{transform:translateY(-3px);box-shadow:0 12px 28px rgba(227,0,25,.10);border-color:#f3c3c8}
.card-p:hover::before{width:100%}
.card-top{display:flex;justify-content:space-between;align-items:flex-start;margin-bottom:14px}
.card-top .badge{position:static}
.card-icon{width:46px;height:46px;border-radius:12px;background:#FFF1F2;display:flex;align-items:center;justify-content:center;font-size:24px}
.card-group{font-size:11px;color:var(--mute);letter-spacing:.08em;margin-bottom:4px}
.card-name{font-size:16px;font-weight:600;color:var(--ink);margin-bottom:6px}
.card-desc{font-size:12.5px;color:var(--ink2);line-height:1.6;flex:1}
.card-url{margin-top:14px;font-size:11px;color:#b3b3b3;font-family:'Cascadia Code',Consolas,monospace}
.card-sm{padding:16px}
.card-sm .card-top{margin-bottom:10px}
.card-sm .card-icon{width:38px;height:38px;font-size:20px;border-radius:10px;background:#f5f5f5}
.ext{font-size:12px;color:var(--mute);font-weight:400}
.card-p.locked{background:var(--soft);cursor:default}
.card-p.locked .card-icon,.card-p.locked .card-name,.card-p.locked .card-desc{opacity:.5}
.card-p.locked:hover{transform:none;box-shadow:none;border-color:var(--line)}
.card-p.locked:hover::before{width:0}

/* ── 登录页: 左品牌区 + 右二维码 ── */
.login{position:relative;z-index:1;display:flex;width:100%;max-width:800px;background:#fff;border-radius:20px;overflow:hidden;
  border:1px solid var(--line);box-shadow:0 24px 64px rgba(0,0,0,.08)}
.login-brand{flex:0 0 46%;padding:52px 40px;display:flex;flex-direction:column;justify-content:center}
.login-brand > *{position:relative;z-index:1}
.login-mark{width:150px;height:auto;display:block;filter:drop-shadow(0 6px 16px rgba(80,0,10,.25))}
.login-title{font-family:'Bahnschrift','Segoe UI',sans-serif;font-size:40px;font-weight:300;line-height:1;margin-top:28px}
.login-tag{font-size:10.5px;letter-spacing:.3em;opacity:.85;margin-top:12px}
.login-note{font-size:13px;opacity:.85;margin-top:34px}
.login-qr{flex:1;padding:40px 32px;text-align:center;display:flex;flex-direction:column;align-items:center;justify-content:center}
.login-head{font-size:16px;font-weight:600;color:var(--ink);margin-bottom:6px}

@media (max-width:720px){
  .login{flex-direction:column;max-width:420px}
  .login-brand{padding:28px 24px;align-items:center;text-align:center}
  .login-mark{width:104px}.login-title{font-size:30px;margin-top:16px}.login-note{margin-top:12px}
  .hero-inner{padding:22px 16px 6px}.hero-sub{padding:4px 16px 20px}
  .hero-title{font-size:32px}.hero-mark{height:52px}.hero-brand{gap:14px}
  .hero-user{text-align:left}.hero-actions{justify-content:flex-start}
}
/* 登录页左栏窄, 装饰火花缩小并推到右下角, 不压在标志后面 */
.login-brand::after{width:210px;height:210px;right:-60px;top:auto;bottom:-60px;opacity:.09}