/* ============================================================
   淼渺 · 设计系统
   写实 + 科技 画风：深蓝宇宙底 + 青蓝紫霓虹
   ============================================================ */

:root{
  --bg:#0B122B;
  --panel:#121B3A;
  --panel2:#0F1730;
  --line:rgba(140,180,255,.14);
  --txt:#E8EEFF;
  --muted:#93A3C8;
  --accent:#2EC8E0;
  --accent2:#6C8CFF;
  --ok:#3DDC97;
  --warn:#FFB454;
  --danger:#F87171;
  --grad:linear-gradient(90deg,#2EC8E0,#6C8CFF);
  --radius:16px;
  --radius-sm:10px;
  --shadow:0 10px 40px rgba(0,0,0,.35);
  --font:"Microsoft YaHei","PingFang SC",system-ui,-apple-system,sans-serif;
}

*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:var(--font);
  background:
    radial-gradient(1200px 520px at 85% -10%, rgba(44,120,255,.16), transparent 60%),
    radial-gradient(900px 420px at -10% 110%, rgba(46,200,224,.12), transparent 60%),
    var(--bg);
  color:var(--txt);
  line-height:1.7;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button{font-family:inherit;cursor:pointer;border:none;background:none;color:inherit}
[hidden]{display:none!important}

/* ===== 顶部导航 ===== */
.topbar{
  position:sticky;top:0;z-index:100;
  background:rgba(11,18,43,.82);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line);
}
.topbar-inner{
  max-width:1180px;margin:0 auto;padding:0 24px;
  display:flex;align-items:center;justify-content:space-between;height:64px;
}
.brand{display:flex;align-items:center;gap:10px;cursor:pointer;user-select:none}
.brand-logo{
  width:34px;height:34px;border-radius:9px;
  background:var(--grad);display:flex;align-items:center;justify-content:center;
  font-size:19px;font-weight:800;color:#04101F;
  box-shadow:0 4px 16px rgba(46,200,224,.35);
}
.brand-name{font-size:19px;font-weight:700;letter-spacing:1px}
.brand-sub{font-size:11px;color:var(--muted);letter-spacing:2px;margin-top:3px}
.nav{display:flex;gap:6px}
.nav-item{
  padding:8px 20px;border-radius:999px;font-size:15px;color:var(--muted);
  transition:.18s;font-weight:500;
}
.nav-item:hover{color:var(--txt)}
.nav-item.active{
  color:#04101F;background:var(--grad);font-weight:700;
  box-shadow:0 4px 16px rgba(46,200,224,.3);
}
.hamburger{display:none;font-size:24px;color:var(--txt)}
.mobile-nav{display:none}

/* ===== 主体 ===== */
main{max-width:1180px;margin:0 auto;padding:0 24px}

/* ===== Hero ===== */
.hero{position:relative;margin:0 -24px;overflow:hidden;min-height:78vh;display:flex;align-items:center;justify-content:center}
.hero-bg{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.hero-overlay{position:absolute;inset:0;background:linear-gradient(180deg,rgba(11,18,43,.25) 0%,rgba(11,18,43,.55) 55%,#0B122B 100%)}
.hero-content{position:relative;z-index:2;text-align:center;padding:40px 24px;max-width:820px}
.hero-badge{
  display:inline-block;padding:7px 18px;border-radius:999px;
  border:1px solid rgba(46,200,224,.4);background:rgba(46,200,224,.1);
  color:var(--accent);font-size:13px;letter-spacing:2px;margin-bottom:24px;
}
.hero-title{font-size:62px;font-weight:800;line-height:1.15;letter-spacing:1px}
.hero-title .hl{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero-sub{font-size:18px;color:var(--muted);margin:22px 0 28px;max-width:640px;margin-left:auto;margin-right:auto}
.hero-tags{display:flex;gap:12px;justify-content:center;flex-wrap:wrap}
.tag{padding:8px 18px;border-radius:999px;border:1px solid var(--line);background:rgba(255,255,255,.04);font-size:14px}
.hero-scroll{position:absolute;bottom:26px;left:50%;transform:translateX(-50%);z-index:2;color:var(--muted);font-size:13px;animation:floaty 2.5s ease-in-out infinite}
@keyframes floaty{0%,100%{transform:translate(-50%,0)}50%{transform:translate(-50%,8px)}}

/* ===== 通用 Section ===== */
.section{padding:72px 0}
.section-head{text-align:center;margin-bottom:48px}
.sec-tag{color:var(--accent);font-size:13px;letter-spacing:3px;display:block;margin-bottom:10px}
.sec-title{font-size:36px;font-weight:700;margin-bottom:12px}
.sec-desc{color:var(--muted);font-size:15px;max-width:620px;margin:0 auto}

/* ===== 初心 ===== */
.chuxin-grid{display:grid;grid-template-columns:1fr 1fr;gap:28px;align-items:start}
.chuxin-video-wrap{position:relative}
.chuxin-video{width:100%;border-radius:var(--radius);background:#000;box-shadow:var(--shadow);aspect-ratio:16/9;object-fit:cover}
.fuwu-video-wrap{position:relative;margin-bottom:48px}
.fuwu-video{width:100%;border-radius:var(--radius);background:#000;box-shadow:var(--shadow);aspect-ratio:16/9;object-fit:cover}
.video-caption{text-align:center;color:var(--muted);font-size:13px;margin-top:12px}
.chuxin-text{display:flex;flex-direction:column;gap:18px}
.vision-block{display:flex;flex-direction:column;gap:16px}
.vision-item{
  background:linear-gradient(180deg,var(--panel),var(--panel2));
  border:1px solid var(--line);border-radius:var(--radius-sm);
  padding:22px 24px;
}
.vision-label{
  display:inline-block;font-size:12px;font-weight:700;color:var(--accent);
  padding:3px 12px;border-radius:999px;border:1px solid rgba(46,200,224,.35);
  background:rgba(46,200,224,.08);margin-bottom:12px;letter-spacing:1px;
}
.vision-text{font-size:15px;color:var(--txt)}
.vision-item.quote{border-left:3px solid var(--accent)}
.vision-item.quote .vision-text{color:#cdd9f5;font-style:italic;line-height:1.9}

.chuxin-img-row{display:grid;grid-template-columns:1fr 1fr;gap:20px;margin-top:36px}
.fig{position:relative}
.fig img{border-radius:var(--radius);box-shadow:var(--shadow);width:100%;aspect-ratio:16/9;object-fit:cover}
.fig figcaption{text-align:center;color:var(--muted);font-size:13px;margin-top:10px}

/* ===== 服务卡片 ===== */
.service-card{
  display:grid;grid-template-columns:1fr 1.2fr;gap:28px;align-items:center;
  background:linear-gradient(180deg,var(--panel),var(--panel2));
  border:1px solid var(--line);border-radius:var(--radius);
  padding:32px;margin-bottom:28px;transition:.2s;
}
.service-card:hover{border-color:rgba(46,200,224,.4);transform:translateY(-3px)}
.card-img img{border-radius:var(--radius-sm);width:100%;aspect-ratio:16/9;object-fit:cover}
.card-title{font-size:24px;font-weight:700;margin-bottom:10px}
.card-lead{color:var(--muted);font-size:14px;margin-bottom:18px}
.feature-list{display:flex;flex-direction:column;gap:12px}
.feature{
  display:flex;flex-direction:column;gap:2px;
  padding:12px 16px;border-radius:var(--radius-sm);
  background:rgba(255,255,255,.03);border:1px solid rgba(255,255,255,.05);
}
.feature b{font-size:14px;color:var(--txt)}
.feature span{font-size:13px;color:var(--muted)}

/* ===== 平台总览闭环 ===== */
.loop-wrap{text-align:center}
.loop-img{border-radius:var(--radius);box-shadow:var(--shadow);margin:0 auto}
.loop-caption{color:var(--muted);font-size:13px;margin-top:18px;max-width:720px;margin-left:auto;margin-right:auto}

/* ===== 平台详情块 ===== */
.platform-block{
  margin-top:24px;
  background:linear-gradient(180deg,var(--panel),var(--panel2));
  border:1px solid var(--line);border-radius:var(--radius);padding:36px;
}
.platform-head{display:flex;align-items:center;gap:18px;margin-bottom:26px}
.platform-logo{
  width:56px;height:56px;border-radius:14px;display:flex;align-items:center;justify-content:center;
  font-size:26px;font-weight:800;color:#fff;flex-shrink:0;
  box-shadow:0 8px 24px rgba(0,0,0,.3);
}
.pk-lx{background:linear-gradient(135deg,#F5A623,#F76B1C)}
.pk-qs{background:linear-gradient(135deg,#2EC8E0,#6C8CFF)}
.pk-wc{background:linear-gradient(135deg,#8B9CFF,#A78BFA)}
.pk-rx{background:linear-gradient(135deg,#3DDC97,#2EC8E0)}
.platform-name h3{font-size:26px;font-weight:700}
.platform-slogan{color:var(--accent);font-size:15px}
.platform-grid{display:grid;grid-template-columns:1fr 1.15fr;gap:28px;align-items:start}
.platform-img img{border-radius:var(--radius-sm);width:100%;aspect-ratio:16/9;object-fit:cover;box-shadow:var(--shadow)}
.platform-info p{margin-bottom:10px;font-size:14px}
.platform-info b{color:var(--accent)}
.highlight-list{list-style:none;margin:16px 0;display:flex;flex-direction:column;gap:10px}
.highlight-list li{
  padding:12px 16px;border-radius:var(--radius-sm);
  background:rgba(255,255,255,.03);border:1px solid rgba(255,255,255,.05);font-size:14px;
}
.highlight-list b{color:var(--accent)}
.entry-group{display:flex;gap:12px;flex-wrap:wrap;margin-top:18px}
.entry-btn{
  padding:11px 22px;border-radius:999px;font-size:14px;font-weight:600;
  border:1px solid var(--line);color:var(--txt);transition:.18s;
}
.entry-btn:hover{border-color:var(--accent);color:var(--accent);background:rgba(46,200,224,.08)}

/* 案例管理 */
.case-filter{display:flex;gap:10px;justify-content:center;flex-wrap:wrap;margin-bottom:36px}
.filter-btn{
  padding:9px 24px;border-radius:999px;font-size:14px;font-weight:600;
  border:1px solid var(--line);color:var(--muted);transition:.18s;
}
.filter-btn:hover{color:var(--txt);border-color:var(--accent)}
.filter-btn.active{color:#04101F;background:var(--grad);font-weight:700}
.case-admin-bar{display:flex;gap:12px;justify-content:center;align-items:center;margin-bottom:28px;flex-wrap:wrap}
.case-admin-bar .btn-primary,.case-admin-bar .btn-admin-toggle{padding:9px 22px}
.case-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.case-card{
  background:linear-gradient(180deg,var(--panel),var(--panel2));
  border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;
  cursor:pointer;transition:.22s;display:flex;flex-direction:column;
}
.case-card:hover{border-color:rgba(46,200,224,.5);transform:translateY(-4px);box-shadow:var(--shadow)}
.case-cover{position:relative;aspect-ratio:16/9;overflow:hidden}
.case-cover img{width:100%;height:100%;object-fit:cover;transition:.3s}
.case-card:hover .case-cover img{transform:scale(1.05)}
.case-level{
  position:absolute;top:12px;left:12px;padding:4px 12px;border-radius:999px;
  font-size:12px;font-weight:700;color:#fff;backdrop-filter:blur(6px);
}
.level-入门{background:rgba(61,220,151,.85)}
.level-进阶{background:rgba(255,180,84,.85)}
.level-精通{background:rgba(248,113,113,.85)}
.case-body{padding:18px 20px;display:flex;flex-direction:column;gap:10px;flex:1}
.case-title{font-size:17px;font-weight:700;line-height:1.4}
.case-desc{font-size:13px;color:var(--muted);line-height:1.6;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}
.case-tags{display:flex;gap:8px;flex-wrap:wrap}
.case-type-tag{padding:3px 10px;border-radius:999px;font-size:11px;border:1px solid var(--line);color:var(--accent)}
.case-meta{display:flex;gap:16px;font-size:12px;color:var(--muted);margin-top:auto;padding-top:6px}
.case-meta span{display:flex;align-items:center;gap:4px}

/* 案例详情 */
.case-detail-card{max-width:820px}
.case-detail-cover{margin:-24px -24px 20px;border-radius:var(--radius) var(--radius) 0 0;overflow:hidden;aspect-ratio:16/9}
.case-detail-cover img{width:100%;height:100%;object-fit:cover}
.case-detail-title{font-size:26px;font-weight:700;margin-bottom:12px}
.case-detail-meta{display:flex;gap:16px;flex-wrap:wrap;margin-bottom:18px;font-size:13px;color:var(--muted)}
.case-detail-content{font-size:15px;line-height:1.9;color:#d5def5}
.case-detail-content img{border-radius:var(--radius-sm);margin:16px 0}
.case-detail-content video{width:100%;border-radius:var(--radius-sm);margin:16px 0}

/* ===== 互动 ===== */
.interact-toolbar{display:flex;justify-content:space-between;align-items:center;margin-bottom:24px;flex-wrap:wrap;gap:12px}
.user-badge{padding:8px 18px;border-radius:999px;background:var(--panel);border:1px solid var(--line);font-size:14px}
.user-badge.is-admin{background:rgba(61,220,151,.12);border-color:rgba(61,220,151,.4);color:var(--ok)}
.btn-admin-toggle{
  padding:9px 20px;border-radius:999px;border:1px solid var(--line);
  font-size:13px;color:var(--muted);transition:.18s;
}
.btn-admin-toggle:hover{color:var(--txt);border-color:var(--accent)}
.btn-admin-toggle.on{color:var(--ok);border-color:var(--ok);background:rgba(61,220,151,.08)}
.post-compose{
  background:linear-gradient(180deg,var(--panel),var(--panel2));
  border:1px solid var(--line);border-radius:var(--radius);padding:24px;margin-bottom:36px;
}
.post-compose h4{font-size:16px;margin-bottom:14px}
.post-title-input,.post-content-input,.post-media-input{
  width:100%;background:rgba(255,255,255,.04);border:1px solid var(--line);
  border-radius:var(--radius-sm);padding:12px 16px;color:var(--txt);font-family:inherit;
  font-size:14px;margin-bottom:12px;outline:none;transition:.18s;
}
.post-title-input:focus,.post-content-input:focus,.post-media-input:focus{border-color:var(--accent)}
.post-content-input{min-height:110px;resize:vertical}
.post-actions{display:flex;justify-content:flex-end}
.btn-primary{
  padding:11px 26px;border-radius:999px;background:var(--grad);color:#04101F;
  font-weight:700;font-size:14px;transition:.18s;box-shadow:0 4px 16px rgba(46,200,224,.3);
}
.btn-primary:hover{filter:brightness(1.1);transform:translateY(-1px)}
.post-list{display:flex;flex-direction:column;gap:20px}
.post-item{
  background:linear-gradient(180deg,var(--panel),var(--panel2));
  border:1px solid var(--line);border-radius:var(--radius);padding:22px 24px;
}
.post-head{display:flex;justify-content:space-between;align-items:center;margin-bottom:10px;flex-wrap:wrap;gap:8px}
.post-author{font-weight:700;font-size:15px;display:flex;align-items:center;gap:8px}
.post-author .admin-mark{font-size:11px;color:var(--ok);border:1px solid var(--ok);padding:1px 8px;border-radius:999px}
.post-time{font-size:12px;color:var(--muted)}
.post-title{font-size:18px;font-weight:700;margin-bottom:8px}
.post-content{font-size:14px;color:#d5def5;line-height:1.8;margin-bottom:12px}
.post-media img,.post-media video{max-width:100%;border-radius:var(--radius-sm);margin-top:10px}
.post-actions{display:flex;gap:10px;margin-top:12px;flex-wrap:wrap}
.post-btn{padding:6px 16px;border-radius:999px;font-size:13px;border:1px solid var(--line);color:var(--muted);transition:.15s}
.post-btn:hover{color:var(--accent);border-color:var(--accent)}
.post-btn.danger:hover{color:var(--danger);border-color:var(--danger)}
.comment-list{margin-top:16px;border-top:1px solid var(--line);padding-top:14px;display:flex;flex-direction:column;gap:12px}
.comment-item{display:flex;gap:10px;align-items:flex-start}
.comment-avatar{width:30px;height:30px;border-radius:50%;background:var(--grad);flex-shrink:0;display:flex;align-items:center;justify-content:center;font-size:13px;color:#04101F;font-weight:700}
.comment-body{flex:1}
.comment-author{font-size:13px;font-weight:600;display:flex;align-items:center;gap:6px}
.comment-text{font-size:13px;color:#c5d0ea;margin-top:2px}
.comment-time{font-size:11px;color:var(--muted)}
.comment-del{margin-left:auto;font-size:11px;color:var(--muted);cursor:pointer}
.comment-del:hover{color:var(--danger)}
.comment-input-row{display:flex;gap:10px;margin-top:14px}
.comment-input{
  flex:1;background:rgba(255,255,255,.04);border:1px solid var(--line);
  border-radius:999px;padding:8px 16px;color:var(--txt);font-size:13px;outline:none;
}
.comment-input:focus{border-color:var(--accent)}
.comment-send{padding:8px 18px;border-radius:999px;background:var(--grad);color:#04101F;font-weight:700;font-size:13px}

/* ===== 弹窗 ===== */
.modal{position:fixed;inset:0;z-index:200;background:rgba(4,8,20,.7);backdrop-filter:blur(6px);display:flex;align-items:center;justify-content:center;padding:24px}
.modal-card{position:relative;background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:24px;max-width:440px;width:100%;max-height:88vh;overflow:auto}
.modal-wide .modal-card{max-width:820px}
.modal-close{position:absolute;top:14px;right:16px;font-size:20px;color:var(--muted);cursor:pointer;z-index:5;width:32px;height:32px;display:flex;align-items:center;justify-content:center;border-radius:50%;background:rgba(255,255,255,.05)}
.modal-close:hover{color:var(--txt);background:rgba(255,255,255,.12)}
.modal-body{color:var(--txt)}
.qr-box{text-align:center;padding:20px 0}
.qr-box img{width:200px;height:200px;border-radius:var(--radius-sm);background:#fff;margin:0 auto;padding:8px}
.qr-box p{margin-top:14px;color:var(--muted);font-size:14px}
.entry-link{display:block;text-align:center;margin:16px 0;padding:14px;border-radius:var(--radius-sm);background:var(--grad);color:#04101F;font-weight:700;font-size:15px}

/* ===== 底部 ===== */
.footer{border-top:1px solid var(--line);padding:32px 0;margin-top:40px}
.footer-inner{max-width:1180px;margin:0 auto;padding:0 24px;display:flex;flex-direction:column;align-items:center;gap:12px;text-align:center}
.footer-brand{display:flex;align-items:center;gap:10px;font-weight:600;font-size:15px}
.footer-links{color:var(--muted);font-size:13px}
.footer-copy{color:rgba(147,163,200,.5);font-size:12px}

/* ===== 响应式 ===== */
@media(max-width:900px){
  .hero-title{font-size:44px}
  .chuxin-grid{grid-template-columns:1fr}
  .service-card{grid-template-columns:1fr}
  .platform-grid{grid-template-columns:1fr}
  .case-grid{grid-template-columns:1fr 1fr}
  .chuxin-img-row{grid-template-columns:1fr}
}
@media(max-width:640px){
  .topbar-inner{height:58px}
  .nav{display:none}
  .hamburger{display:block}
  .mobile-nav{display:flex;flex-direction:column;padding:8px 24px 16px;gap:4px;background:rgba(11,18,43,.96)}
  .mobile-nav .nav-item{display:block;text-align:center;padding:10px;border-radius:10px}
  .mobile-nav[hidden]{display:none}
  main{padding:0 16px}
  .hero{min-height:60vh}
  .hero-title{font-size:34px}
  .hero-sub{font-size:15px}
  .section{padding:48px 0}
  .sec-title{font-size:26px}
  .case-grid{grid-template-columns:1fr}
  .brand-sub{display:none}
}

/* ===== 案例管理表单 ===== */
.case-detail-card label{
  display:flex;flex-direction:column;gap:6px;font-size:14px;color:var(--muted);
}
.case-detail-card input[type="text"],
.case-detail-card textarea,
.case-detail-card select{
  width:100%;background:rgba(255,255,255,.04);border:1px solid var(--line);
  border-radius:var(--radius-sm);padding:10px 14px;color:var(--txt);font-family:inherit;
  font-size:14px;outline:none;transition:.18s;
}
.case-detail-card input:focus,.case-detail-card textarea:focus,.case-detail-card select:focus{border-color:var(--accent)}
.case-detail-card textarea{resize:vertical;min-height:60px}
.case-detail-card select{background:var(--panel2)}