:root{
  --bg1:#eef6ff;
  --bg2:#efe9ff;
  --card:rgba(255,255,255,.72);
  --card-strong:rgba(255,255,255,.86);
  --text:#465e7d;
  --muted:#7b8faa;
  --primary:#74c8f6;
  --primary-strong:#58b5ea;
  --line:rgba(135, 181, 220, .28);
  --shadow:0 18px 46px rgba(102,147,197,.14);
  --radius:28px;
  --radius-sm:18px;
}

*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{
  min-height:100vh;
  font-family:"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;
  color:var(--text);
  background:
    radial-gradient(circle at top left, rgba(134,208,255,.25), transparent 28%),
    radial-gradient(circle at top right, rgba(185,170,255,.18), transparent 26%),
    linear-gradient(135deg,var(--bg1),var(--bg2));
}
a{text-decoration:none;color:inherit}
button,input,textarea{font:inherit}

.page-shell{
  width:min(1240px, calc(100% - 32px));
  margin:0 auto;
  padding:18px 0 48px;
}

.glass{
  background:var(--card);
  border:1px solid rgba(255,255,255,.72);
  backdrop-filter:blur(16px);
  box-shadow:var(--shadow);
}

.topbar{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:18px;
  padding:18px 22px;
  border-radius:999px;
  margin-bottom:26px;
}
.brand{display:flex;align-items:center;gap:12px}
.brand-badge{
  width:42px;height:42px;border-radius:50%;
  display:grid;place-items:center;
  background:linear-gradient(135deg,#88d7ff,#a7abff);
  color:#fff;font-weight:800;box-shadow:0 10px 24px rgba(110,163,233,.26);
}
.brand-text{display:flex;flex-direction:column;gap:2px}
.brand-text strong{font-size:20px}
.brand-text small{color:var(--muted)}
.topnav{display:flex;gap:18px;flex-wrap:wrap}
.topnav a{color:var(--muted);font-weight:600}
.topnav a:hover{color:var(--primary-strong)}

.hero{
  display:grid;
  grid-template-columns:1.35fr .75fr;
  gap:22px;
  border-radius:38px;
  padding:36px;
  margin-bottom:34px;
}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  padding:7px 12px;border-radius:999px;
  border:1px solid var(--line);
  background:rgba(255,255,255,.66);
  color:var(--primary-strong);
  font-size:13px;font-weight:700;
}
.hero h1{
  margin:18px 0 16px;
  font-size:clamp(34px, 5vw, 54px);
  line-height:1.08;
  color:#536d8f;
}
.hero p{
  margin:0;
  line-height:1.9;
  color:var(--muted);
  font-size:16px;
}
.hero-actions{
  margin-top:24px;
  display:flex;gap:12px;flex-wrap:wrap;
}
.btn{
  border:none;cursor:pointer;
  border-radius:999px;
  padding:14px 20px;
  font-weight:700;
  transition:.22s ease;
}
.btn:hover{transform:translateY(-2px)}
.btn-primary{
  color:#fff;
  background:linear-gradient(135deg,#7ad3ff,#68b9ee);
  box-shadow:0 12px 24px rgba(104,185,238,.24);
}
.btn-secondary{
  color:var(--primary-strong);
  background:rgba(255,255,255,.85);
  border:1px solid var(--line);
}
.btn-ghost{
  color:var(--muted);
  background:transparent;
  border:1px dashed var(--line);
}
.btn-small{padding:10px 16px;font-size:14px}

.hero-panel{display:grid;gap:14px}
.hero-stat{
  padding:20px;border-radius:24px;
  background:var(--card-strong);
  border:1px solid rgba(255,255,255,.7);
}
.hero-stat .label{
  display:block;font-size:13px;color:var(--muted);margin-bottom:8px
}
.hero-stat strong{display:block;font-size:22px;color:#557090;margin-bottom:6px}
.hero-stat small{color:var(--muted)}

.section{margin-top:34px}
.section-head{
  display:flex;align-items:end;justify-content:space-between;
  gap:18px; margin-bottom:18px;
}
.section-head h2{
  margin:8px 0 8px;
  font-size:44px;line-height:1.05;
  color:#566f90;
}
.section-head p{margin:0;color:var(--muted);line-height:1.8}
.text-link{color:var(--primary-strong);font-weight:700}

.feature-grid{
  display:grid;
  grid-template-columns:repeat(3, minmax(0,1fr));
  gap:18px;
}
.feature-card{
  border-radius:30px;overflow:hidden;min-height:100%;
}
.feature-cover{
  height:220px;background:linear-gradient(135deg,#dff4ff,#e9e5ff);
  display:flex;align-items:center;justify-content:center;
}
.feature-cover img,.album-cover img{
  width:100%;height:100%;object-fit:cover;display:block;
}
.feature-cover-fallback{
  color:var(--muted);font-size:26px;font-weight:800;
}
.feature-body{padding:22px}
.feature-body h3{
  margin:0 0 10px;font-size:24px;color:#556f90;
}
.feature-body p{
  margin:0 0 14px;line-height:1.8;color:var(--muted)
}
.article-card .meta{
  display:inline-block;margin-bottom:10px;color:var(--muted);font-size:13px
}

.interaction .compact-grid{
  display:grid;
  grid-template-columns:repeat(2,minmax(0,1fr));
  gap:18px;
}
.compact-panel{
  border-radius:28px;padding:22px;
}
.compact-head{
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  margin-bottom:14px;
}
.compact-head h3{margin:0;font-size:24px;color:#57708f}
.small-link{
  background:none;border:none;padding:0;cursor:pointer;
  color:var(--primary-strong);font-weight:700;
}
.compact-list{display:grid;gap:12px}
.mini-card{
  padding:14px 16px;border-radius:18px;
  background:rgba(255,255,255,.82);
  border:1px solid var(--line);
}
.mini-card h4{margin:0 0 8px;font-size:16px;color:#587292}
.mini-card p{margin:0 0 8px;color:var(--muted);line-height:1.75}
.mini-card small{color:var(--muted)}
.mini-answer{
  margin-top:8px;padding-top:8px;border-top:1px dashed var(--line);
  color:#6481a3;font-size:14px;
}
.fold-panel{
  margin-top:14px;
  padding-top:14px;
  border-top:1px dashed var(--line);
}
.hidden{display:none !important}
.mini-form{display:grid;gap:10px}
.mini-form input,.mini-form textarea,.search-inline input{
  width:100%;
  padding:14px 16px;
  border-radius:16px;
  border:1px solid var(--line);
  background:rgba(255,255,255,.78);
  outline:none;
  color:var(--text);
}
.mini-form textarea{resize:vertical;min-height:110px}
.form-tip{
  min-height:22px;
  font-size:14px;
  margin:10px 0 0;
  color:var(--muted);
}
.form-tip.ok{color:#44aa7b}
.form-tip.error{color:#d16a8b}
.compact-empty,.empty-card{
  padding:20px;border-radius:18px;
  background:rgba(255,255,255,.75);
  border:1px dashed var(--line);
  color:var(--muted);
}
.empty-card{min-height:120px;display:grid;place-items:center}

.album-grid{
  display:grid;
  grid-template-columns:repeat(4,minmax(0,1fr));
  gap:18px;
}
.album-card{
  overflow:hidden;border-radius:28px;
}
.album-cover{
  display:block;height:190px;background:linear-gradient(135deg,#dff4ff,#ece7ff)
}
.album-body{padding:16px 18px 20px}
.album-body h3{margin:0 0 8px;font-size:20px;color:#587292}
.album-body p{margin:0;color:var(--muted);line-height:1.8}

.utility-grid{
  display:grid;
  grid-template-columns:1.1fr .8fr 1fr;
  gap:18px;
}
.utility-card{
  border-radius:28px;padding:22px;
}
.utility-card h3{margin:0 0 10px;font-size:24px;color:#57708f}
.utility-card p{margin:0 0 14px;color:var(--muted);line-height:1.8}
.tiny-list{display:grid;gap:10px}
.friend-item,.search-item{
  display:block;
  padding:14px 16px;
  border-radius:16px;
  background:rgba(255,255,255,.78);
  border:1px solid var(--line);
}
.friend-item strong,.search-item strong{display:block;color:#5b7595;margin-bottom:6px}
.friend-item span,.search-item p{color:var(--muted);margin:0;line-height:1.7}
.search-inline{display:flex;gap:10px;flex-wrap:wrap}
.search-inline input{flex:1 1 220px}
.search-results{display:grid;gap:10px;margin-top:14px}

@media (max-width: 1080px){
  .hero{grid-template-columns:1fr}
  .feature-grid,.album-grid,.utility-grid,.interaction .compact-grid{
    grid-template-columns:repeat(2,minmax(0,1fr));
  }
}
@media (max-width: 720px){
  .page-shell{width:min(100% - 18px, 100%)}
  .topbar{border-radius:28px;align-items:flex-start;flex-direction:column}
  .topnav{gap:12px}
  .hero{padding:24px;border-radius:28px}
  .section-head{flex-direction:column;align-items:flex-start}
  .section-head h2{font-size:34px}
  .feature-grid,.album-grid,.utility-grid,.interaction .compact-grid{
    grid-template-columns:1fr;
  }
}