:root{--bg:#ffffff;--text:#111111;--muted:#666666;--surface:#f6f7f9;--line:#e9eaee;--brand:#ff6b6b;--brand-2:#20c997;--accent:#ffa06b;--shadow:0 8px 24px rgba(0,0,0,.08);--radius:14px}
*{box-sizing:border-box}
html,body{height:100%}
body{margin:0;background:var(--bg);color:var(--text);font-family:Inter,ui-sans-serif,system-ui,-apple-system,Segoe UI,Roboto,PingFang SC,Microsoft YaHei,Arial,sans-serif;line-height:1.6}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
.container{max-width:1120px;margin:0 auto;padding:0 16px}
.header{position:sticky;top:0;z-index:40;background:rgba(255,255,255,.75);-webkit-backdrop-filter:saturate(180%) blur(8px);backdrop-filter:saturate(180%) blur(8px);border-bottom:1px solid var(--line)}
.header-inner{height:64px;display:flex;align-items:center;justify-content:space-between}
.brand{display:flex;align-items:center;gap:10px;font-weight:800}
.brand img{height:32px;width:32px;border-radius:8px;object-fit:cover}
.nav{display:none;gap:20px;align-items:center}
.nav a{padding:8px 12px;border-radius:10px;color:#444}
.nav a.active,.nav a:hover{background:#f3f4f6;color:#111}
.cta{display:none}
.btn{display:inline-flex;align-items:center;gap:8px;padding:10px 14px;border-radius:12px;border:1px solid transparent;cursor:pointer;transition:all .2s ease;font-weight:700}
.btn-primary{background:var(--brand-2);color:#fff}
.btn-primary:hover{transform:translateY(-1px);box-shadow:var(--shadow)}
.btn-ghost{border-color:#e5e7eb;background:#fff}
.menu-btn{display:inline-flex;align-items:center;justify-content:center;height:40px;width:40px;border-radius:10px;border:1px solid #e5e7eb;background:#fff}
.mobile-panel{display:none;position:fixed;inset:64px 0 0 auto;width:min(86vw,360px);background:#fff;border-left:1px solid var(--line);padding:16px 16px 24px;box-shadow:-12px 0 24px rgba(0,0,0,.08)}
.mobile-nav a{display:block;padding:10px 12px;border-radius:10px;color:#444}
.mobile-nav a:hover{background:#f3f4f6}
.hero{padding:56px 0 24px}
.hero-inner{display:grid;grid-template-columns:1.2fr .8fr;gap:32px;align-items:center}
.kicker{display:inline-flex;align-items:center;gap:8px;background:#fff;border:1px solid var(--line);padding:6px 10px;border-radius:999px;color:#444}
.kicker i{display:inline-block;height:8px;width:8px;border-radius:999px;background:linear-gradient(135deg,var(--brand),var(--accent))}
.h1{margin:10px 0 12px;font-size:40px;line-height:1.15;font-weight:900;letter-spacing:-.02em}
.muted{color:var(--muted)}
.hero-actions{display:flex;gap:12px;margin-top:18px;flex-wrap:wrap}
.hero-art{position:relative;aspect-ratio:1/1;border-radius:24px;background:linear-gradient(135deg,#fafbfc 0%,#f8fafc 50%,#f1f5f9 100%);border:1px solid var(--line);box-shadow:var(--shadow);overflow:hidden}
.art-bubble{position:absolute;border-radius:999px;filter:blur(12px);opacity:.3;animation:float 8s ease-in-out infinite}
.b1{left:20%;top:25%;width:80px;height:80px;background:linear-gradient(135deg,rgba(99,102,241,0.2),rgba(139,92,246,0.15))}
.b2{right:25%;top:35%;width:60px;height:60px;background:linear-gradient(135deg,rgba(34,197,94,0.2),rgba(16,185,129,0.15))}
.b3{left:35%;bottom:25%;width:90px;height:90px;background:linear-gradient(135deg,rgba(251,146,60,0.2),rgba(245,101,101,0.15))}
@keyframes float{0%,100%{transform:translateY(0)}50%{transform:translateY(-8px)}}
.section{padding:24px 0}
.section-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:14px}
.section-title{font-size:20px;font-weight:800}
.card-grid{display:grid;gap:24px;grid-template-columns:repeat(1,minmax(0,1fr));margin-bottom:32px}
.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:20px;box-shadow:var(--shadow);transition:transform .2s ease,box-shadow .2s ease}
.card:hover{transform:translateY(-2px);box-shadow:0 12px 28px rgba(0,0,0,.12)}
.badge{display:inline-flex;align-items:center;gap:6px;padding:6px 10px;border-radius:999px;border:1px solid #e5e7eb;background:#fff;color:#333;font-weight:600}
.badge-dot{height:8px;width:8px;border-radius:999px;background:var(--brand-2)}
.skill-tags{display:flex;flex-wrap:wrap;gap:8px}
.skill{padding:8px 10px;border-radius:999px;background:#f3f4f6;color:#333;border:1px solid #e5e7eb;font-weight:600}
.quick-links{display:grid;gap:16px;grid-template-columns:repeat(3,1fr)}
.quick-card{display:flex;align-items:center;gap:12px;padding:14px;border-radius:16px;border:1px solid var(--line);background:linear-gradient(135deg,#fff, #fffdf9)}
.quick-card i{height:12px;width:12px;border-radius:999px}
.quick-card:hover{transform:translateY(-2px);box-shadow:var(--shadow)}
.footer{margin-top:40px;border-top:1px solid var(--line);padding:22px 0;color:#444}
.footer-inner{display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap}
.socials{display:flex;align-items:center;gap:10px}
.icon{display:inline-flex;align-items:center;justify-content:center;height:32px;width:32px;border-radius:999px;border:1px solid #e5e7eb;background:#fff;color:#333;transition:all .2s ease}
.icon:hover{transform:translateY(-1px);box-shadow:var(--shadow)}
.controls{display:flex;gap:10px;flex-wrap:wrap}
.switch{display:flex;align-items:center;gap:8px;padding:8px 12px;border:1px solid #e5e7eb;border-radius:12px;background:#fff}
.projects-hero{padding:26px 0 6px}
.filter-bar{display:flex;gap:10px;flex-wrap:wrap}
.chip{padding:8px 12px;border:1px solid #e5e7eb;border-radius:999px;background:#fff;color:#333;cursor:pointer;font-weight:700}
.chip.active{border-color:var(--brand-2);box-shadow:0 0 0 3px rgba(32,201,151,.15)}
.projects-grid{display:grid;gap:16px;grid-template-columns:repeat(1,minmax(0,1fr))}
.project-card{border:1px solid var(--line);border-radius:16px;overflow:hidden;background:#fff;box-shadow:var(--shadow);transition:transform .2s ease,box-shadow .2s ease}
.project-card:hover{transform:translateY(-2px);box-shadow:0 12px 28px rgba(0,0,0,.12)}
.project-cover{position:relative;aspect-ratio:16/9;background:#fafafa}
.project-body{padding:14px}
.project-meta{display:flex;align-items:center;gap:8px;flex-wrap:wrap}
.actions{display:flex;gap:8px;flex-wrap:wrap}
.actions .btn{padding:8px 12px;border-radius:10px}
.tiers{display:grid;gap:18px}
.tier{border:1px solid var(--line);border-radius:16px;background:#fff;padding:14px;box-shadow:var(--shadow)}
.tier-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:10px}
.tier-badge{padding:6px 10px;border-radius:999px;font-weight:800}
.tier-badge.platinum{background:linear-gradient(135deg,#e5e7eb,#ffffff);border:1px solid #d1d5db}
.tier-badge.gold{background:linear-gradient(135deg,#fff1a6,#ffd666);border:1px solid #f1c232}
.tier-badge.silver{background:linear-gradient(135deg,#f0f0f0,#fafafa);border:1px solid #e5e7eb}
.tier-badge.bronze{background:linear-gradient(135deg,#ffd3b6,#ffb082);border:1px solid #f0a36e}
.wall{display:grid;gap:14px;grid-template-columns:repeat(1,minmax(0,1fr))}
.sponsor-card{background:linear-gradient(135deg,#fff 0%,#f8fafc 100%);border:1px solid rgba(0,122,255,.1);border-radius:16px;display:flex;align-items:flex-start;gap:16px;padding:28px;box-shadow:0 8px 32px rgba(0,0,0,.08);transition:all .4s cubic-bezier(.4,0,.2,1);position:relative;overflow:hidden;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px)}
.sponsor-card:hover{transform:translateY(-2px);box-shadow:0 12px 24px rgba(0,122,255,.15);border-color:rgba(0,122,255,.2)}

.sponsor-card::after{content:'';position:absolute;top:-50%;left:-50%;width:200%;height:200%;background:radial-gradient(circle,rgba(0,122,255,.03) 0%,transparent 70%);opacity:0;transition:opacity .4s ease;pointer-events:none}
.sponsor-card:hover::after{opacity:1}
.sponsor-avatar{height:64px;width:64px;border-radius:50%;background:linear-gradient(135deg,#f3f4f6,#e5e7eb);flex-shrink:0;box-shadow:0 8px 24px rgba(0,0,0,.12);border:3px solid rgba(255,255,255,0.8);transition:all 0.3s ease;position:relative;overflow:hidden}
.sponsor-avatar:hover{transform:scale(1.02);box-shadow:0 8px 16px rgba(0,0,0,.12)}
.sponsor-avatar::before{content:'';position:absolute;top:0;left:0;right:0;bottom:0;background:linear-gradient(45deg,rgba(255,255,255,0.3) 0%,transparent 50%,rgba(255,255,255,0.1) 100%);opacity:0;transition:opacity 0.3s ease}
.sponsor-avatar:hover::before{opacity:1}
.sponsor-info{flex:1;min-width:0}
.sponsor-name{font-size:20px;font-weight:800;color:var(--text);margin-bottom:8px;background:linear-gradient(135deg,#1a1a1a,#4a4a4a);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.sponsor-quote{font-size:15px;color:#6b7280;font-style:italic;margin-bottom:12px;line-height:1.6;position:relative;padding-left:16px}
.sponsor-quote::before{content:'"';position:absolute;left:0;top:-2px;font-size:20px;color:rgba(0,122,255,0.3);font-weight:bold}
.sponsor-desc{font-size:14px;color:#9ca3af;margin-bottom:16px;line-height:1.5}
.sponsor-contacts{display:flex;flex-wrap:wrap;gap:8px}
.contact-tag{padding:8px 14px;border-radius:24px;background:linear-gradient(135deg,rgba(0,122,255,0.08),rgba(88,86,214,0.08));color:#007AFF;border:1px solid rgba(0,122,255,0.2);font-size:12px;font-weight:600;transition:all 0.3s ease;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px)}
.contact-tag:hover{background:linear-gradient(135deg,rgba(0,122,255,0.15),rgba(88,86,214,0.15));border-color:rgba(0,122,255,0.4);transform:translateY(-2px);box-shadow:0 4px 12px rgba(0,122,255,0.2)}
.like-btn{background:linear-gradient(135deg,#ff6b6b,#ee5a52);border:none;border-radius:24px;color:#fff;cursor:pointer;font-size:13px;font-weight:600;padding:8px 16px;transition:all .4s cubic-bezier(.4,0,.2,1);display:flex;align-items:center;gap:6px;box-shadow:0 4px 16px rgba(255,107,107,0.3);position:relative;overflow:hidden;flex-shrink:0}
.like-btn:hover{transform:scale(1.02) translateY(-1px);box-shadow:0 8px 16px rgba(255,107,107,.3);background:linear-gradient(135deg,#ff5252,#e53935)}
.like-btn.active{border-color:var(--brand);background:#fff5f5;box-shadow:0 0 0 3px rgba(255,107,107,.15)}
.like-count{font-weight:700;color:var(--brand)}
.timeline{display:grid;gap:12px}
.timeline-item{display:grid;grid-template-columns:auto 1fr;gap:10px;align-items:start}
.timeline-dot{height:10px;width:10px;border-radius:999px;background:var(--brand)}
.qr{height:112px;width:112px;border:1px dashed #e5e7eb;border-radius:12px;display:flex;align-items:center;justify-content:center;color:#999}
@media(min-width:768px){
  .nav{display:flex}
  .cta{display:flex}
  .menu-btn{display:none}
  .mobile-panel{display:none!important}
  .card-grid{grid-template-columns:repeat(3,minmax(0,1fr))}
  .projects-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .wall{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media(min-width:1200px){
  .hero{padding:72px 0 28px}
  .h1{font-size:48px}
  .projects-grid{grid-template-columns:repeat(3,minmax(0,1fr))}
  .wall{grid-template-columns:repeat(3,minmax(0,1fr))}
}
.fade-up{opacity:0;transform:translateY(8px);animation:fadeUp .6s ease forwards}
@keyframes fadeUp{to{opacity:1;transform:none}}
.hidden{display:none!important}

@keyframes spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

.loading-state, .error-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 200px;
  grid-column: 1 / -1;
}

.loading-spinner {
  border: 3px solid #f3f3f3;
  border-top: 3px solid var(--brand-2);
  border-radius: 50%;
  width: 32px;
  height: 32px;
  animation: spin 1s linear infinite;
  margin-bottom: 16px;
}

.error-state p {
  color: #dc3545;
  margin-bottom: 16px;
  text-align: center;
}

.load-more-container {
  text-align: center;
  margin-top: 16px;
}

.spacer-10 {
  height: 10px;
}

.spacer-14 {
  height: 14px;
}

.flex-between {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.flex-between-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}

.skill-tags-container {
  margin-top: 8px;
}

.hero-min-60 {
  min-height: 60vh;
}

.section-padding-100 {
  padding: 100px 0;
}

.section-title-large {
  font-size: 2rem;
  margin-top: 4rem;
}

.sponsor-avatar-gradient {
  background: linear-gradient(135deg, #ff9a9e, #fecfef, #fecfef);
}

.quick-icon-brand {
  background: var(--brand);
}

.quick-icon-brand-2 {
  background: var(--brand-2);
}

.quick-icon-accent {
  background: var(--accent);
}

.sponsor-avatar-image {
  background-image: url('https://cdn.nanako.ltd/logo.jpg');
  background-size: cover;
  background-position: center;
}