/* ============================================================
   四端演示大厅 portal.css · V4 视觉语汇
   深色舞台（Civic-Tech 双调性） · 白卡档案 × 发丝描边 × 微影
   ============================================================ */
:root{
  --blue:#082c5e; --deep1:#0a1f3f; --deep2:#00183b; --deep3:#0a1624;
  --orange:#FF8123; --green:#b7c9a2;
  --ink:#243242; --ink2:#44474f; --ink3:#8a90a0;
  --hair:rgba(255,255,255,.14);
  --num:"Bahnschrift","DIN Alternate","Arial Narrow",sans-serif;
}
*{margin:0;padding:0;box-sizing:border-box}
html{-webkit-font-smoothing:antialiased;scroll-behavior:smooth}
body{
  font-family:"Source Han Sans SC","Noto Sans SC","PingFang SC","Microsoft YaHei",sans-serif;
  background:var(--deep2);color:#fff;line-height:1.6;min-height:100vh;
  background:
    radial-gradient(900px 480px at 85% -10%,rgba(15,76,129,.55),transparent 60%),
    radial-gradient(700px 420px at -10% 30%,rgba(22,84,158,.4),transparent 55%),
    linear-gradient(165deg,#0a1f3f,#00183b 55%,#0a1624);
  background-attachment:fixed;
}
a{color:inherit;text-decoration:none}
button{font-family:inherit;cursor:pointer}

/* 舞台网格微光（极淡，避免噪点感） */
body::before{content:'';position:fixed;inset:0;pointer-events:none;z-index:0;
  background-image:linear-gradient(rgba(255,255,255,.025) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.025) 1px,transparent 1px);
  background-size:54px 54px;
  -webkit-mask-image:radial-gradient(1100px 620px at 50% 0%,#000 20%,transparent 78%);
          mask-image:radial-gradient(1100px 620px at 50% 0%,#000 20%,transparent 78%)}

.wrap{max-width:1180px;margin:0 auto;padding:0 28px;position:relative;z-index:1}

/* ---------- 顶栏 ---------- */
.phead{display:flex;align-items:center;justify-content:space-between;gap:18px;padding:26px 0}
.pbrand{display:flex;align-items:center;gap:12px}
.pbrand img{width:40px;height:40px;border-radius:10px;background:rgba(255,255,255,.94);padding:6px;box-shadow:0 6px 18px rgba(0,0,0,.35)}
.pbrand .tx b{display:block;font-size:16px;letter-spacing:1px;font-weight:800}
.pbrand .tx span{display:block;font-family:var(--num);font-size:10px;letter-spacing:.24em;color:rgba(255,255,255,.55);margin-top:2px}
.pver{display:inline-flex;align-items:center;gap:8px;padding:7px 14px;border:1px solid var(--hair);border-radius:999px;
  font-family:var(--num);font-size:12px;letter-spacing:.12em;color:#c7d8f5;background:rgba(255,255,255,.05)}
.pver i{width:7px;height:7px;border-radius:50%;background:var(--green);box-shadow:0 0 0 4px rgba(183,201,162,.15)}

/* ---------- Hero ---------- */
.phero{padding:56px 0 34px;max-width:820px}
.phero .kicker{display:inline-flex;align-items:center;gap:10px;font-family:var(--num);font-size:11px;letter-spacing:.3em;color:#9fc0e0;margin-bottom:18px}
.phero .kicker::before{content:'';width:26px;height:1px;background:var(--orange)}
.phero h1{font-size:clamp(30px,4.4vw,46px);font-weight:800;letter-spacing:.01em;line-height:1.22;margin-bottom:16px}
.phero h1 em{font-style:normal;color:transparent;background:linear-gradient(100deg,#ff9d4d,var(--orange) 55%,#ffb37a);-webkit-background-clip:text;background-clip:text}
.phero p{font-size:15px;color:rgba(226,236,255,.82);line-height:1.9;letter-spacing:.2px}
.phero p b{color:#fff;font-weight:700}
.phero .tagrow{display:flex;flex-wrap:wrap;gap:10px;margin-top:22px}
.phero .tagrow span{font-size:12px;color:#cfe0fb;padding:6px 14px;border:1px solid var(--hair);border-radius:999px;background:rgba(255,255,255,.045)}

/* ---------- 四端卡片网格 ---------- */
.pgrid{display:grid;grid-template-columns:1fr 1fr;gap:20px;padding:26px 0 8px}
.pcard{position:relative;display:flex;flex-direction:column;background:#fff;color:var(--ink);border-radius:16px;
  padding:30px 30px 24px;min-height:432px;overflow:hidden;isolation:isolate;
  box-shadow:0 1px 2px rgba(0,0,0,.18),0 24px 48px -18px rgba(0,0,0,.55);
  transition:transform .25s cubic-bezier(.16,1,.3,1),box-shadow .25s}
.pcard::before{content:'';position:absolute;inset:0;z-index:-1;opacity:0;transition:opacity .3s;
  background:radial-gradient(420px 220px at 85% -8%,rgba(8,44,94,.10),transparent 62%)}
.pcard:hover{transform:translateY(-6px);box-shadow:0 2px 4px rgba(0,0,0,.2),0 36px 72px -20px rgba(0,0,0,.6)}
.pcard:hover::before{opacity:1}
/* 序号缎带 */
.pcard .no{position:absolute;top:0;right:26px;font-family:var(--num);font-size:64px;font-weight:700;
  color:rgba(8,44,94,.05);line-height:1;pointer-events:none;user-select:none}
.pcard .en{font-family:var(--num);font-size:10.5px;letter-spacing:.26em;color:var(--orange);font-weight:700}
.pcard .ic{width:52px;height:52px;margin:18px 0 16px;border-radius:13px;display:grid;place-items:center;
  background:linear-gradient(160deg,#082c5e,#0f4c81);color:#fff;
  box-shadow:0 10px 22px -8px rgba(8,44,94,.55)}
.pcard .ic svg{width:26px;height:26px}
.pcard h3{font-size:21px;font-weight:800;letter-spacing:.3px;display:flex;align-items:center;gap:10px}
.pcard h3 .role{font-size:11px;font-weight:600;color:var(--blue);border:1px solid rgba(8,44,94,.25);background:#eef3fb;
  padding:3px 10px;border-radius:999px;letter-spacing:1px;white-space:nowrap}
.pcard .sub{font-size:12.5px;color:var(--ink3);margin-top:3px;letter-spacing:.4px}
.pcard .desc{font-size:13.5px;color:var(--ink2);line-height:1.85;margin:12px 0 0}
.pcard .chips{display:flex;flex-wrap:wrap;gap:7px;margin-top:14px}
.pcard .chips i{font-style:normal;font-size:11.5px;color:var(--ink);background:#f3f5f9;border:1px solid #e4e8f0;
  border-radius:6px;padding:4px 10px;letter-spacing:.2px}
.pcard .foot{margin-top:auto;padding-top:20px;border-top:1px solid #eef1f5;display:flex;align-items:center;justify-content:space-between;gap:14px}
.pcard .foot .hint{font-size:11.5px;color:var(--ink3)}
.pcard .go{display:inline-flex;align-items:center;gap:8px;height:40px;padding:0 20px;border-radius:8px;background:var(--blue);
  color:#fff;font-size:13.5px;font-weight:700;letter-spacing:2px;transition:.18s;flex:0 0 auto}
.pcard .go svg{width:15px;height:15px;transition:transform .18s}
.pcard .go:hover{background:var(--orange)}
.pcard .go:hover svg{transform:translateX(3px)}
/* 卡片强调描边分类 */
.pcard.acc-web   {border-top:3px solid #0f4c81}
.pcard.acc-mini  {border-top:3px solid var(--green)}
.pcard.acc-admin {border-top:3px solid var(--orange)}
.pcard.acc-dash  {border-top:3px solid #1f6f78}

/* ---------- 演示动线建议 ---------- */
.pflow{margin:34px 0 10px;background:rgba(255,255,255,.055);border:1px solid var(--hair);border-radius:16px;padding:26px 30px}
.pflow h4{display:flex;align-items:center;gap:10px;font-size:15px;letter-spacing:1.5px;color:#fff;margin-bottom:18px}
.pflow h4 svg{width:17px;height:17px;color:var(--green)}
.pflow .steps{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.pflow .step{position:relative;padding-left:34px}
.pflow .step::before{content:attr(data-n);position:absolute;left:0;top:2px;width:24px;height:24px;border-radius:50%;
  background:var(--orange);color:#fff;font-family:var(--num);font-size:12.5px;font-weight:700;
  display:grid;place-items:center;box-shadow:0 6px 14px -4px rgba(255,129,35,.5)}
.pflow .step b{display:block;font-size:13.5px;color:#fff;letter-spacing:.3px;margin-bottom:4px}
.pflow .step p{font-size:12.5px;color:rgba(226,236,255,.72);line-height:1.75}
.pflow .step:not(:last-child)::after{content:'';position:absolute;top:13px;right:-6px;width:12px;height:1px;background:rgba(255,255,255,.25)}

/* ---------- 数据联动说明 ---------- */
.psync{display:flex;align-items:center;gap:16px;margin:14px 0 44px;padding:14px 20px;border-radius:12px;
  background:rgba(183,201,162,.09);border:1px solid rgba(183,201,162,.28)}
.psync svg{width:20px;height:20px;color:var(--green);flex:0 0 20px}
.psync p{font-size:12.5px;color:#dbe7d0;line-height:1.7}
.psync p b{color:#fff}

/* ---------- 底栏 ---------- */
.pfoot{border-top:1px solid rgba(255,255,255,.09);padding:22px 0 30px;display:flex;align-items:center;justify-content:space-between;gap:14px;flex-wrap:wrap}
.pfoot .copy{font-size:12px;color:rgba(255,255,255,.5);letter-spacing:.5px}
.pfoot .copy b{color:#9fc0e0}
.pfoot a{font-size:12px;color:#9fc0e0;border:1px solid rgba(255,255,255,.18);padding:6px 14px;border-radius:999px;transition:.15s}
.pfoot a:hover{color:#fff;border-color:rgba(255,255,255,.5)}

/* ---------- 响应式 ---------- */
@media(max-width:920px){
  .pgrid{grid-template-columns:1fr}
  .pflow .steps{grid-template-columns:1fr}
  .pflow .step:not(:last-child)::after{display:none}
  .pcard{min-height:0}
  .phero h1{font-size:30px}
}
@media(max-width:560px){
  .phead{padding:18px 0}
  .pver{display:none}
  .phero{padding:30px 0 20px}
  .pcard{padding:24px 22px 20px}
  .pcard .foot{flex-direction:column;align-items:stretch}
  .pcard .go{justify-content:center}
  .psync{align-items:flex-start}
}