/*
  OpenAIOPC 主样式表
  说明：包含主题变量、基础布局、组件样式、页面样式与响应式断点。
*/
:root,
[data-theme="dark"] {
  --bg:         #05060f;
  --bg-2:       #0a0b14;
  --bg-card:    #0a0b14;
  --blue:       #3b82f6;
  --blue-dim:   rgba(59,130,246,0.15);
  --purple:     #8b5cf6;
  --cyan:       #06b6d4;
  --orange:     #f97316;
  --green:      #10b981;
  --txt:        #f3f4f6;
  --txt-2:      #d1d5db;
  --txt-3:      #9ca3af;
  --border:     rgba(255,255,255,0.08);
  --border-2:   rgba(255,255,255,0.12);
  --glass:      rgba(10,11,20,0.6);
  --nav-bg:     rgba(5,6,15,0.85);
  --r:          14px;
  --r-sm:       8px;
  --t:          0.28s cubic-bezier(.4,0,.2,1);
}

[data-theme="light"] {
  --bg:         #ffffff;
  --bg-2:       #ffffff;
  --bg-card:    #ffffff;
  --blue:       #2563eb;
  --blue-dim:   rgba(37,99,235,0.1);
  --purple:     #7c3aed;
  --cyan:       #0891b2;
  --orange:     #ea580c;
  --green:      #059669;
  --txt:        #111827;
  --txt-2:      #374151;
  --txt-3:      #6b7280;
  --border:     #e5e7eb;
  --border-2:   #e5e7eb;
  --glass:      #ffffff;
  --nav-bg:     #ffffff;
}

*, *::before, *::after {
  margin: 0; padding: 0; box-sizing: border-box;
  transition-property: background-color, border-color, color, box-shadow;
  transition-duration: 0.35s;
  transition-timing-function: ease;
}
.card, .feature-card, .ai-tool, .case-card, .event-card, .api-panel,
.btn-pri, .btn-sec, .btn-login, .btn-signup, .api-cta-blue, .api-cta-purple,
.gs-btn, .compose-submit, .event-join, .follow-btn, .nav-cat, .case-tab,
.auth-tab, .form-submit, .captcha-btn, .social-login {
  transition:
    background-color 0.35s ease,
    border-color 0.35s ease,
    color 0.35s ease,
    box-shadow 0.35s ease,
    transform 0.28s cubic-bezier(.4,0,.2,1),
    opacity 0.28s ease;
}

html{scroll-behavior:smooth;font-size:15px;}
body{
  font-family:'Noto Sans SC',sans-serif;
  background:var(--bg);
  color:var(--txt-2);
  line-height:1.7;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
}
a{text-decoration:none;color:inherit;}
img{display:block;max-width:100%;}
#mainContent:focus{outline:none;}
.skip-link{
  position:fixed;
  left:-999px;
  top:8px;
  z-index:1200;
  background:var(--blue);
  color:#fff;
  padding:8px 14px;
  border-radius:8px;
  font-size:0.85rem;
}
.skip-link:focus{left:12px;}
.sr-only{
  position:absolute;
  width:1px;
  height:1px;
  padding:0;
  margin:-1px;
  overflow:hidden;
  clip:rect(0,0,0,0);
  border:0;
}
.global-error{
  position:fixed;
  top:72px;
  right:16px;
  max-width:360px;
  background:rgba(239,68,68,0.12);
  border:1px solid rgba(239,68,68,0.35);
  color:var(--txt);
  padding:12px 14px;
  border-radius:10px;
  font-size:0.82rem;
  display:none;
  z-index:1200;
}
.global-error.show{display:block;}

::-webkit-scrollbar{width:5px;}
::-webkit-scrollbar-track{background:var(--bg);}
::-webkit-scrollbar-thumb{background:var(--border);border-radius:4px;}

.wrap{max-width:1180px;margin:0 auto;padding:0 24px;}

#topnav{
  position:fixed;top:0;left:0;right:0;z-index:900;
  height:60px;
  display:flex;align-items:center;
  padding:0 28px;
  gap:0;
  background:var(--nav-bg);
  backdrop-filter:none;
  border-bottom:1px solid var(--border);
  transition:background var(--t);
}
.nav-logo{
  display:flex;align-items:center;gap:10px;
  font-family:'Syne',sans-serif;
  font-size:1.15rem;font-weight:800;
  color:var(--txt);
  margin-right:32px;
  white-space:nowrap;
  flex-shrink:0;
}
.nav-logo .logo-dot{
  width:10px;height:10px;border-radius:50%;
  background:var(--blue);
}
.nav-links{
  display:flex;align-items:center;gap:2px;
  list-style:none;flex:1;
  overflow-x:auto;
  scrollbar-width:none;
}
.nav-links::-webkit-scrollbar{display:none;}
.nav-links li a{
  display:flex;align-items:center;gap:0;
  padding:6px 14px;
  border-radius:var(--r-sm);
  font-size:0.95rem;font-weight:600;
  color:var(--txt-2);
  white-space:nowrap;
  transition:color var(--t),background var(--t);
}
.nav-links li a:hover{color:var(--txt);background:rgba(127,127,127,0.08);}
.nav-links li a.active{
  color:var(--blue);
  background:var(--blue-dim);
}
.nav-right{
  display:flex;align-items:center;gap:10px;
  margin-left:16px;flex-shrink:0;
}

.btn-theme{
  width:38px;height:38px;
  border-radius:50%;
  border:1px solid var(--border);
  background:var(--glass);
  color:var(--txt-2);
  font-size:0.95rem;
  cursor:pointer;
  display:flex;align-items:center;justify-content:center;
  transition:all var(--t);
  flex-shrink:0;
  backdrop-filter:blur(8px);
  position:relative;
  overflow:hidden;
}
.btn-theme:hover{
  border-color:var(--blue);
  color:var(--blue);
  transform:rotate(20deg) scale(1.1);
  box-shadow:0 0 16px rgba(59,130,246,0.25);
}
.btn-theme .icon-sun,
.btn-theme .icon-moon{
  position:absolute;
  transition:opacity 0.3s ease, transform 0.3s ease;
}
[data-theme="dark"] .btn-theme .icon-sun  { opacity:1; transform:scale(1);   }
[data-theme="dark"] .btn-theme .icon-moon { opacity:0; transform:scale(0.6); }
[data-theme="light"] .btn-theme .icon-sun  { opacity:0; transform:scale(0.6); }
[data-theme="light"] .btn-theme .icon-moon { opacity:1; transform:scale(1);   }

.btn-login{
  padding:6px 18px;border-radius:50px;
  border:1px solid var(--border);
  color:var(--txt-2);font-size:0.82rem;font-weight:500;
  cursor:pointer;background:transparent;
  transition:all var(--t);
}
.btn-login:hover{border-color:var(--blue);color:var(--blue);}
.btn-signup{
  padding:6px 18px;border-radius:50px;
  background:var(--blue);
  color:#fff;font-size:0.82rem;font-weight:600;
  cursor:pointer;border:none;
  transition:all var(--t);box-shadow:0 0 16px rgba(59,130,246,0.3);
}
.btn-signup:hover{transform:translateY(-1px);box-shadow:0 4px 20px rgba(59,130,246,0.45);}

.page{
  display:none;
  min-height:100vh;
  padding-top:60px;
}
.page.active{display:block;}

#page-auth {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 1000;
  background: #ffffff;
  backdrop-filter: none;
  align-items: center;
  justify-content: center;
  padding: 20px;
  min-height: unset;
  padding-top: 0;
}
#page-auth.active {
  display: flex !important;
}
.auth-modal-close {
  position: absolute;
  top: 20px;
  right: 24px;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: rgba(255,255,255,0.06);
  border: 1px solid var(--border-2);
  color: var(--txt-2);
  font-size: 1rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--t);
  z-index: 1001;
}
.auth-modal-close:hover {
  background: rgba(255,255,255,0.12);
  color: var(--txt);
}

.rv{opacity:0;transform:translateY(28px);transition:opacity .6s ease,transform .6s ease;}
.rv.on{opacity:1;transform:none;}
.rv-d1{transition-delay:.1s;}
.rv-d2{transition-delay:.2s;}
.rv-d3{transition-delay:.3s;}

.chip{
  display:inline-flex;align-items:center;gap:6px;
  font-size:0.72rem;font-weight:600;text-transform:uppercase;letter-spacing:2px;
  color:var(--cyan);padding:4px 14px;
  border-radius:50px;
  border:1px solid rgba(6,182,212,0.25);
  background:rgba(6,182,212,0.07);
  margin-bottom:14px;
}
.page-title{
  font-family:'Syne',sans-serif;
  font-size:clamp(1.9rem,4vw,2.9rem);
  font-weight:800;color:var(--txt);
  line-height:1.2;margin-bottom:14px;
}
.page-title .hl{
  color:var(--blue);
}
.page-sub{font-size:1rem;color:var(--txt-2);max-width:600px;margin-bottom:48px;line-height:1.8;}
.card{
  background:var(--bg-card);
  border:1px solid var(--border);
  border-radius:var(--r);
  transition:transform var(--t),border-color var(--t),box-shadow var(--t);
  backdrop-filter:none;
}
.card:hover{
  transform:translateY(-5px);
  border-color:rgba(59,130,246,0.3);
  box-shadow:0 12px 36px rgba(0,0,0,0.12);
}
[data-theme="light"] .card:hover{
  box-shadow:0 12px 36px rgba(37,99,235,0.12);
}

#page-home .hero{
  position:relative;min-height:calc(100vh - 60px);
  display:flex;align-items:center;overflow:hidden;
}

.hero-body{position:relative;z-index:2;padding:80px 0 60px;}

.hero-badge{
  display:inline-flex;align-items:center;gap:8px;
  background:rgba(59,130,246,0.1);border:1px solid rgba(59,130,246,0.25);
  border-radius:50px;padding:5px 16px 5px 8px;
  margin-bottom:24px;font-size:0.78rem;color:var(--blue);font-weight:500;
}
.hero-badge .blink{
  width:7px;height:7px;border-radius:50%;background:var(--blue);
  box-shadow:none;
  animation:none;
}

.hero-h1{
  font-family:'Syne',sans-serif;
  font-size:clamp(2.8rem,7vw,5rem);
  font-weight:800;color:var(--txt);
  line-height:1.1;letter-spacing:-2px;
  margin-bottom:24px;max-width:760px;
}
.hero-h1 .g1{
  color:var(--blue);
}
.hero-p{font-size:1.08rem;color:var(--txt-2);max-width:580px;margin-bottom:40px;line-height:1.85;}

.hero-btns{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:60px;}
.btn-pri{
  display:inline-flex;align-items:center;gap:8px;
  background:var(--blue);color:#fff;
  padding:13px 28px;border-radius:50px;font-weight:600;font-size:0.92rem;
  border:none;cursor:pointer;
  box-shadow:0 4px 20px rgba(59,130,246,0.4);
  transition:all var(--t);
}
.btn-pri:hover{transform:translateY(-2px);box-shadow:0 8px 28px rgba(59,130,246,0.55);}
.btn-sec{
  display:inline-flex;align-items:center;gap:8px;
  background:transparent;color:var(--txt);
  padding:13px 26px;border-radius:50px;font-weight:500;font-size:0.92rem;
  border:1px solid var(--border-2);cursor:pointer;
  transition:all var(--t);
}
.btn-sec:hover{border-color:rgba(59,130,246,0.4);background:var(--blue-dim);}

.home-features{
  display:grid;grid-template-columns:repeat(3,1fr);gap:20px;
  padding:80px 0;position:relative;z-index:2;
}
.home-section{
  margin:40px 0 90px;
  padding:0;
  border:none;
  border-radius:0;
  background:transparent;
}
.home-section + .home-section{margin-top:32px;}
.section-kicker{
  display:inline-flex;align-items:center;gap:8px;
  font-size:0.72rem;font-weight:700;text-transform:uppercase;letter-spacing:2px;
  color:var(--blue);margin-bottom:12px;
  padding:6px 14px;border-radius:50px;background:var(--blue-dim);border:1px solid rgba(59,130,246,0.2);
}
.section-title{
  font-family:'Syne',sans-serif;font-size:2.3rem;font-weight:800;color:var(--txt);
  margin-bottom:14px;
}
.section-sub{font-size:1rem;color:var(--txt-2);line-height:1.8;margin-bottom:30px;max-width:760px;}
.eco-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;}
.empower-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;}
.eco-card{
  border:1px solid var(--border);border-radius:var(--r);
  padding:26px;background:#fff;transition:all var(--t);
  box-shadow:0 10px 24px rgba(15,23,42,0.06);
}
.eco-card:hover{border-color:rgba(59,130,246,0.35);transform:translateY(-6px);box-shadow:0 18px 36px rgba(15,23,42,0.1);}
.eco-icon{
  width:46px;height:46px;border-radius:14px;
  display:flex;align-items:center;justify-content:center;
  background:var(--blue-dim);color:var(--blue);
  font-size:1.2rem;margin-bottom:16px;
}
.eco-card h3{font-size:1.02rem;font-weight:700;color:var(--txt);margin-bottom:10px;}
.eco-card p{font-size:0.88rem;color:var(--txt-2);line-height:1.7;}
.feature-card{
  background:var(--glass);border:1px solid var(--border);border-radius:var(--r);
  padding:32px 28px;backdrop-filter:none;
  cursor:pointer;
  transition:all var(--t);
  position:relative;overflow:hidden;
}
.feature-card::after{
  content:none;
}
.feature-card:hover{transform:translateY(-6px);border-color:rgba(59,130,246,0.3);box-shadow:0 16px 40px rgba(0,0,0,0.15);}
[data-theme="light"] .feature-card:hover{box-shadow:0 16px 40px rgba(37,99,235,0.1);}
.fc-icon{
  width:48px;height:48px;border-radius:12px;
  display:flex;align-items:center;justify-content:center;
  font-size:1.3rem;margin-bottom:18px;position:relative;z-index:1;
}
.fc-blue{background:rgba(59,130,246,0.12);color:var(--blue);}
.fc-purple{background:rgba(139,92,246,0.12);color:var(--purple);}
.fc-cyan{background:rgba(6,182,212,0.12);color:var(--cyan);}
.fc-orange{background:rgba(249,115,22,0.12);color:var(--orange);}
.fc-green{background:rgba(16,185,129,0.12);color:var(--green);}
.fc-rose{background:rgba(244,63,94,0.12);color:#f43f5e;}
.feature-card h3{font-size:1rem;font-weight:600;color:var(--txt);margin-bottom:8px;position:relative;z-index:1;}
.feature-card p{font-size:0.85rem;color:var(--txt-3);line-height:1.7;position:relative;z-index:1;}
.feature-card .fc-arrow{
  position:absolute;top:20px;right:20px;
  color:var(--txt-3);font-size:0.75rem;
  opacity:0;transform:translateX(-6px);
  transition:all var(--t);z-index:1;
}
.feature-card:hover .fc-arrow{opacity:1;transform:translateX(0);}

.home-stats{
  display:grid;grid-template-columns:repeat(4,1fr);
  border:1px solid var(--border);border-radius:var(--r);
  background:var(--glass);backdrop-filter:none;
  overflow:hidden;margin-bottom:100px;
}
.hs{padding:36px 20px;text-align:center;border-right:1px solid var(--border);}
.hs:last-child{border-right:none;}
.hs-val{
  font-family: Arial, Helvetica, sans-serif;
  font-size:2.4rem;font-weight:800;color:var(--txt);
  line-height:1;margin-bottom:6px;
  display:flex;align-items:baseline;justify-content:center;gap:2px;
  min-height:2.4rem;
}
.hs-num{font-variant-numeric:tabular-nums;letter-spacing:-1px;}
.hs-pre{
  font-size:0.55em;
  color:var(--blue);
  font-weight:800;align-self:center;
}
.hs-suf{
  font-size:0.52em;
  color:var(--blue);
  font-weight:800;white-space:nowrap;
}
.hs-lab{font-size:0.8rem;color:var(--txt-3);}

#page-ainav{padding-top:80px;}
.ainav-header{padding:60px 0 40px;text-align:center;}
.ainav-search{
  display:flex;align-items:center;gap:0;
  max-width:580px;margin:0 auto 40px;
  background:var(--bg-card);
  border:1px solid var(--border);border-radius:50px;
  padding:4px 4px 4px 20px;
  transition:border-color var(--t);
}
.ainav-search:focus-within{border-color:var(--blue);}
.ainav-search input{
  flex:1;background:transparent;border:none;outline:none;
  color:var(--txt);font-size:0.92rem;
  font-family:'Noto Sans SC',sans-serif;
}
.ainav-search input::placeholder{color:var(--txt-3);}
.ainav-search button{
  background:var(--blue);color:#fff;border:none;
  padding:10px 22px;border-radius:50px;font-size:0.85rem;font-weight:500;
  cursor:pointer;transition:all var(--t);flex-shrink:0;
}
.ainav-search button:hover{box-shadow:0 4px 16px rgba(59,130,246,0.4);}

.nav-cats{
  display:flex;align-items:center;gap:8px;
  flex-wrap:wrap;justify-content:center;margin-bottom:48px;
}
.nav-cat{
  padding:7px 18px;border-radius:50px;font-size:0.82rem;font-weight:500;
  border:1px solid var(--border-2);color:var(--txt-2);
  cursor:pointer;background:transparent;
  transition:all var(--t);white-space:nowrap;
}
.nav-cat:hover,.nav-cat.active{background:var(--blue-dim);border-color:rgba(59,130,246,0.4);color:var(--blue);}

.ai-tools-grid{
  display:grid;grid-template-columns:repeat(4,1fr);gap:18px;
  padding-bottom:80px;
}
.ai-tool{
  background:var(--glass);border:1px solid var(--border);border-radius:var(--r);
  padding:22px 20px;cursor:pointer;
  transition:all var(--t);
  display:flex;flex-direction:column;gap:10px;
  position:relative;overflow:hidden;
}
.ai-tool:hover{transform:translateY(-4px);border-color:rgba(59,130,246,0.3);box-shadow:0 10px 28px rgba(0,0,0,0.12);}
[data-theme="light"] .ai-tool:hover{box-shadow:0 10px 28px rgba(37,99,235,0.1);}
.ai-tool-logo{
  width:42px;height:42px;border-radius:10px;
  display:flex;align-items:center;justify-content:center;
  font-size:1.2rem;flex-shrink:0;
}
.ai-tool-name{font-size:0.95rem;font-weight:600;color:var(--txt);}
.ai-tool-tag{display:inline-block;font-size:0.68rem;font-weight:600;padding:2px 10px;border-radius:50px;}
.tag-chat{background:rgba(59,130,246,0.12);color:var(--blue);}
.tag-img{background:rgba(139,92,246,0.12);color:var(--purple);}
.tag-write{background:rgba(6,182,212,0.12);color:var(--cyan);}
.tag-code{background:rgba(16,185,129,0.12);color:var(--green);}
.tag-vid{background:rgba(249,115,22,0.12);color:var(--orange);}
.tag-biz{background:rgba(244,63,94,0.12);color:#f43f5e;}
.ai-tool-desc{font-size:0.8rem;color:var(--txt-3);line-height:1.6;}
.ai-tool-link{
  display:inline-flex;align-items:center;gap:4px;
  font-size:0.75rem;color:var(--blue);margin-top:auto;
  opacity:0;transform:translateY(4px);transition:all var(--t);
}
.ai-tool:hover .ai-tool-link{opacity:1;transform:none;}

#page-api{padding:80px 0;}
.api-hero{text-align:center;padding:60px 0 56px;position:relative;}
.api-split{display:grid;grid-template-columns:1fr 1fr;gap:28px;margin-bottom:64px;}
.api-panel{
  border-radius:var(--r);padding:40px 36px;
  border:1px solid var(--border);backdrop-filter:none;
  position:relative;overflow:hidden;transition:all var(--t);
}
.api-panel::before{
  content:none;
}
.api-panel:hover{transform:translateY(-6px);box-shadow:0 20px 50px rgba(0,0,0,0.15);}
[data-theme="light"] .api-panel:hover{box-shadow:0 20px 50px rgba(37,99,235,0.1);}

.api-panel-personal{
  background:var(--bg-card);
  border-color:rgba(59,130,246,0.22);
}
.api-panel-personal:hover{border-color:rgba(59,130,246,0.4);}

.api-panel-enterprise{
  background:var(--bg-card);
  border-color:rgba(139,92,246,0.22);
}
.api-panel-enterprise:hover{border-color:rgba(139,92,246,0.4);}

.api-panel-badge{
  display:inline-flex;align-items:center;gap:7px;
  font-size:0.7rem;font-weight:700;text-transform:uppercase;letter-spacing:2px;
  padding:4px 14px;border-radius:50px;margin-bottom:20px;
}
.badge-personal{background:rgba(59,130,246,0.12);color:var(--blue);border:1px solid rgba(59,130,246,0.25);}
.badge-enterprise{background:rgba(139,92,246,0.12);color:var(--purple);border:1px solid rgba(139,92,246,0.25);}

.api-panel-icon{
  width:64px;height:64px;border-radius:16px;
  display:flex;align-items:center;justify-content:center;
  font-size:1.8rem;margin-bottom:22px;position:relative;z-index:1;
}
.icon-personal{background:rgba(59,130,246,0.12);}
.icon-enterprise{background:rgba(139,92,246,0.12);}

.api-panel h2{
  font-family:'Syne',sans-serif;font-size:1.55rem;font-weight:800;
  color:var(--txt);margin-bottom:10px;position:relative;z-index:1;
}
.api-panel .api-desc{
  font-size:0.9rem;color:var(--txt-2);line-height:1.8;margin-bottom:28px;position:relative;z-index:1;
}
.api-features{list-style:none;margin-bottom:32px;position:relative;z-index:1;}
.api-features li{
  display:flex;align-items:flex-start;gap:10px;
  font-size:0.85rem;color:var(--txt-2);
  padding:8px 0;border-bottom:1px solid var(--border);
}
.api-features li:last-child{border-bottom:none;}
.api-features li i{margin-top:2px;flex-shrink:0;font-size:0.78rem;}
.feat-check-blue{color:var(--blue);}
.feat-check-purple{color:var(--purple);}

.api-price-row{display:flex;align-items:flex-end;gap:6px;margin-bottom:24px;position:relative;z-index:1;}
.api-price-main{
  font-family:'Syne',sans-serif;font-size:2.2rem;font-weight:800;color:var(--txt);
  font-variant-numeric:tabular-nums;letter-spacing:-1px;line-height:1;
}
.api-price-unit{font-size:0.82rem;color:var(--txt-3);padding-bottom:4px;}
.api-price-note{font-size:0.75rem;color:var(--txt-3);padding-bottom:4px;}

.api-cta-blue{
  display:inline-flex;align-items:center;gap:8px;
  width:100%;justify-content:center;
  padding:13px 24px;border-radius:50px;
  background:var(--blue);color:#fff;
  font-size:0.9rem;font-weight:600;border:none;cursor:pointer;
  box-shadow:0 4px 20px rgba(59,130,246,0.35);transition:all var(--t);
  position:relative;z-index:1;
}
.api-cta-blue:hover{transform:translateY(-2px);box-shadow:0 8px 28px rgba(59,130,246,0.55);}
.api-cta-purple{
  display:inline-flex;align-items:center;gap:8px;
  width:100%;justify-content:center;
  padding:13px 24px;border-radius:50px;
  background:var(--purple);color:#fff;
  font-size:0.9rem;font-weight:600;border:none;cursor:pointer;
  box-shadow:0 4px 20px rgba(139,92,246,0.35);transition:all var(--t);
  position:relative;z-index:1;
}
.api-cta-purple:hover{transform:translateY(-2px);box-shadow:0 8px 28px rgba(139,92,246,0.55);}

.api-models-section{margin-bottom:64px;}
.api-models-title{
  font-family:'Syne',sans-serif;font-size:1.3rem;font-weight:700;
  color:var(--txt);text-align:center;margin-bottom:28px;
}
.api-models-grid{display:grid;grid-template-columns:repeat(6,1fr);gap:14px;}
.api-model-card{
  background:var(--glass);border:1px solid var(--border);border-radius:var(--r-sm);
  padding:18px 14px;text-align:center;cursor:default;transition:all var(--t);
}
.api-model-card:hover{border-color:rgba(59,130,246,0.3);transform:translateY(-3px);box-shadow:0 8px 24px rgba(0,0,0,0.1);}
.api-model-logo{font-size:1.6rem;margin-bottom:8px;}
.api-model-name{font-size:0.78rem;font-weight:600;color:var(--txt);margin-bottom:3px;}
.api-model-ver{font-size:0.68rem;color:var(--txt-3);}

.api-stats-bar{
  display:grid;grid-template-columns:repeat(4,1fr);
  border:1px solid var(--border);border-radius:var(--r);
  background:var(--glass);backdrop-filter:none;
  overflow:hidden;margin-bottom:64px;
}
.api-stat{
  padding:32px 20px;text-align:center;border-right:1px solid var(--border);
  position:relative;overflow:hidden;
}
.api-stat:last-child{border-right:none;}
.api-stat-val{
  font-family:'Syne',sans-serif;font-size:2rem;font-weight:800;color:var(--txt);
  line-height:1;margin-bottom:6px;
  display:flex;align-items:baseline;justify-content:center;gap:2px;
  font-variant-numeric:tabular-nums;letter-spacing:-1px;min-height:2rem;
}
.api-stat-suf{
  font-size:0.52em;
  color:var(--blue);
  font-weight:800;
}
.api-stat-lab{font-size:0.78rem;color:var(--txt-3);}

#page-guide{padding:80px 0;}
.guide-layout{display:grid;grid-template-columns:260px 1fr;gap:40px;align-items:start;}
.guide-sidebar{
  position:sticky;top:80px;
  background:var(--glass);border:1px solid var(--border);border-radius:var(--r);padding:20px;
}
.gs-title{font-size:0.72rem;font-weight:600;text-transform:uppercase;letter-spacing:2px;color:var(--txt-3);margin-bottom:16px;padding:0 8px;}
.gs-item{
  display:flex;align-items:center;gap:12px;
  padding:10px;border-radius:var(--r-sm);cursor:pointer;transition:all var(--t);margin-bottom:4px;
}
.gs-item:hover{background:rgba(127,127,127,0.06);}
.gs-item.active{background:var(--blue-dim);}
.gs-num{
  width:26px;height:26px;border-radius:50%;
  display:flex;align-items:center;justify-content:center;
  font-size:0.7rem;font-weight:700;flex-shrink:0;
  background:var(--border);color:var(--txt-2);transition:all var(--t);
}
.gs-item.active .gs-num{background:var(--blue);color:#fff;}
.gs-item.done .gs-num{background:var(--green);color:#fff;}
.gs-label{font-size:0.85rem;color:var(--txt-2);}
.gs-item.active .gs-label{color:var(--blue);}

.guide-step{
  background:var(--glass);border:1px solid var(--border);border-radius:var(--r);
  padding:40px;margin-bottom:24px;display:none;
}
.guide-step.active{display:block;}
.gs-step-num{
  display:inline-flex;align-items:center;gap:10px;
  font-size:0.78rem;font-weight:700;color:var(--orange);
  text-transform:uppercase;letter-spacing:2px;margin-bottom:16px;
}
.guide-step h3{font-family:'Syne',sans-serif;font-size:1.6rem;font-weight:700;color:var(--txt);margin-bottom:12px;}
.guide-step .gs-intro{font-size:0.95rem;color:var(--txt-2);margin-bottom:28px;line-height:1.8;}
.tool-recommend{display:grid;grid-template-columns:repeat(2,1fr);gap:14px;margin-bottom:28px;}
.tool-rec{
  background:rgba(59,130,246,0.06);border:1px solid rgba(59,130,246,0.15);
  border-radius:var(--r-sm);padding:18px 16px;
}
.tool-rec-name{font-size:0.9rem;font-weight:600;color:var(--txt);margin-bottom:6px;}
.tool-rec-desc{font-size:0.8rem;color:var(--txt-3);line-height:1.6;}
.guide-tip{
  display:flex;gap:12px;
  background:rgba(16,185,129,0.07);border:1px solid rgba(16,185,129,0.18);
  border-radius:var(--r-sm);padding:16px 18px;
  font-size:0.85rem;color:var(--txt-2);
}
.guide-tip i{color:var(--green);flex-shrink:0;margin-top:2px;}
.gs-nav{display:flex;justify-content:space-between;align-items:center;margin-top:28px;}
.gs-btn{
  display:inline-flex;align-items:center;gap:8px;
  padding:10px 22px;border-radius:50px;font-size:0.85rem;font-weight:500;
  border:1px solid var(--border);color:var(--txt-2);cursor:pointer;
  background:transparent;transition:all var(--t);
}
.gs-btn:hover{border-color:var(--blue);color:var(--blue);}
.gs-btn.pri{background:var(--blue);border-color:var(--blue);color:#fff;}
.gs-btn.pri:hover{box-shadow:0 4px 16px rgba(59,130,246,0.4);}
.gs-progress{width:120px;height:4px;background:var(--border);border-radius:4px;overflow:hidden;}
.gs-progress-bar{height:100%;background:var(--blue);transition:width 0.5s ease;}

#page-cases{padding:80px 0;}
.cases-tabs{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:40px;}
.case-tab{
  padding:8px 20px;border-radius:50px;font-size:0.82rem;font-weight:500;
  border:1px solid var(--border-2);color:var(--txt-2);
  cursor:pointer;background:transparent;transition:all var(--t);
}
.case-tab.active,.case-tab:hover{background:var(--blue-dim);border-color:rgba(59,130,246,0.3);color:var(--blue);}
.cases-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;}
.case-card{
  background:var(--glass);border:1px solid var(--border);border-radius:var(--r);
  overflow:hidden;cursor:pointer;transition:all var(--t);
}
.case-card:hover{transform:translateY(-5px);border-color:rgba(59,130,246,0.3);box-shadow:0 14px 40px rgba(0,0,0,0.1);}
.cc-head{height:120px;display:flex;align-items:center;justify-content:center;font-size:2.4rem;position:relative;}
.cc-body{padding:22px 22px 24px;}
.cc-industry{display:inline-block;font-size:0.68rem;font-weight:600;padding:3px 10px;border-radius:50px;margin-bottom:10px;}
.cc-body h3{font-size:1rem;font-weight:600;color:var(--txt);margin-bottom:8px;}
.cc-body p{font-size:0.83rem;color:var(--txt-3);line-height:1.65;margin-bottom:16px;}
.cc-result{
  display:flex;align-items:center;gap:8px;
  font-size:0.78rem;color:var(--green);font-weight:500;
  border-top:1px solid var(--border);padding-top:14px;
}

#page-online{padding:80px 0;}
.news-layout{display:grid;grid-template-columns:240px 1fr 340px;gap:24px;align-items:start;}
.news-section-title{font-size:0.78rem;font-weight:600;text-transform:uppercase;letter-spacing:1.5px;color:var(--txt-3);margin-bottom:14px;}
.news-cats{display:flex;flex-direction:column;gap:8px;}
.news-cat{
  display:flex;align-items:center;justify-content:space-between;
  padding:10px 12px;border-radius:var(--r-sm);
  font-size:0.85rem;color:var(--txt-2);cursor:pointer;transition:all var(--t);
  background:rgba(127,127,127,0.04);border:1px solid transparent;
}
.news-cat.active{background:var(--blue-dim);color:var(--blue);border-color:rgba(59,130,246,0.4);}
.news-main{display:flex;flex-direction:column;gap:16px;}
.news-list{display:flex;flex-direction:column;gap:16px;}
.news-card{
  background:var(--glass);border:1px solid var(--border);border-radius:var(--r);
  padding:18px 20px;cursor:pointer;transition:all var(--t);
}
.news-card:hover{transform:translateY(-2px);border-color:rgba(59,130,246,0.3);box-shadow:0 10px 28px rgba(0,0,0,0.12);}
.news-card.active{border-color:rgba(59,130,246,0.55);box-shadow:0 10px 28px rgba(59,130,246,0.18);}
.news-title{font-size:1.05rem;font-weight:700;color:var(--txt);margin-bottom:6px;}
.news-meta{display:flex;gap:10px;flex-wrap:wrap;font-size:0.78rem;color:var(--txt-3);margin-bottom:10px;}
.news-summary{font-size:0.9rem;color:var(--txt-2);line-height:1.7;}
.news-pagination{display:flex;gap:8px;flex-wrap:wrap;}
.news-page{
  min-width:36px;height:36px;border-radius:10px;border:1px solid var(--border);
  display:flex;align-items:center;justify-content:center;font-size:0.82rem;color:var(--txt-2);
  cursor:pointer;background:transparent;transition:all var(--t);
}
.news-page.active{background:var(--blue);color:#fff;border-color:var(--blue);}
.news-detail{padding:20px 22px;position:sticky;top:90px;max-height:calc(100vh - 120px);overflow:auto;}
.news-detail h3{font-size:1.1rem;font-weight:700;color:var(--txt);margin-bottom:10px;}
.news-detail .news-meta{margin-bottom:14px;}
.news-detail .news-content{font-size:0.9rem;color:var(--txt-2);line-height:1.8;white-space:pre-wrap;}

.community-left .card{padding:22px 20px;margin-bottom:16px;}
.profile-head{display:flex;align-items:center;gap:12px;margin-bottom:16px;}
.profile-avatar{
  width:48px;height:48px;border-radius:50%;
  background:var(--blue);
  display:flex;align-items:center;justify-content:center;
  font-size:1.1rem;color:#fff;font-weight:700;flex-shrink:0;
}
.profile-name{font-size:0.92rem;font-weight:600;color:var(--txt);}
.profile-role{font-size:0.75rem;color:var(--txt-3);}
.profile-stats{display:grid;grid-template-columns:1fr 1fr 1fr;gap:0;border-top:1px solid var(--border);padding-top:14px;}
.ps-item{text-align:center;padding:8px 0;}
.ps-val{font-size:1.1rem;font-weight:700;color:var(--txt);font-variant-numeric:tabular-nums;}
.ps-lab{font-size:0.68rem;color:var(--txt-3);}
.menu-item{
  display:flex;align-items:center;gap:10px;
  padding:10px 12px;border-radius:var(--r-sm);
  font-size:0.85rem;color:var(--txt-2);cursor:pointer;transition:all var(--t);margin-bottom:2px;
}
.menu-item:hover,.menu-item.active{background:var(--blue-dim);color:var(--blue);}
.menu-item i{width:16px;text-align:center;opacity:0.7;}
.badge{margin-left:auto;background:var(--blue);color:#fff;font-size:0.65rem;font-weight:700;padding:2px 7px;border-radius:50px;}

.post-compose{
  background:var(--glass);border:1px solid var(--border);border-radius:var(--r);
  padding:18px;margin-bottom:18px;
}
.compose-row{display:flex;align-items:center;gap:12px;}
.compose-input{
  flex:1;background:rgba(127,127,127,0.06);border:1px solid var(--border);
  border-radius:50px;padding:10px 18px;
  color:var(--txt-2);font-size:0.85rem;
  font-family:'Noto Sans SC',sans-serif;outline:none;transition:border-color var(--t);cursor:text;
}
.compose-input:focus{border-color:var(--blue);color:var(--txt);}
.compose-submit{
  padding:10px 20px;border-radius:50px;
  background:var(--blue);color:#fff;font-size:0.82rem;font-weight:500;
  border:none;cursor:pointer;transition:all var(--t);flex-shrink:0;
}
.compose-submit:hover{box-shadow:0 4px 14px rgba(59,130,246,0.4);}

.post{
  background:var(--glass);border:1px solid var(--border);border-radius:var(--r);
  padding:22px;margin-bottom:14px;transition:border-color var(--t);
}
.post:hover{border-color:rgba(59,130,246,0.2);}
.post-header{display:flex;align-items:center;gap:12px;margin-bottom:14px;}
.post-ava{
  width:38px;height:38px;border-radius:50%;
  display:flex;align-items:center;justify-content:center;
  font-size:0.9rem;font-weight:700;color:#fff;flex-shrink:0;
}
.post-meta{flex:1;}
.post-author{font-size:0.88rem;font-weight:600;color:var(--txt);}
.post-time{font-size:0.73rem;color:var(--txt-3);}
.post-tag{font-size:0.68rem;font-weight:600;padding:2px 9px;border-radius:50px;}
.post-content{font-size:0.87rem;color:var(--txt-2);line-height:1.75;margin-bottom:16px;}
.post-actions{display:flex;align-items:center;gap:18px;}
.post-act{display:flex;align-items:center;gap:6px;font-size:0.78rem;color:var(--txt-3);cursor:pointer;transition:color var(--t);}
.post-act:hover{color:var(--blue);}
.post-act i{font-size:0.82rem;}

.community-right .card{padding:18px 16px;margin-bottom:14px;}
.widget-title{font-size:0.78rem;font-weight:600;text-transform:uppercase;letter-spacing:1.5px;color:var(--txt-3);margin-bottom:14px;}
.trending-item{display:flex;align-items:flex-start;gap:10px;padding:8px 0;border-bottom:1px solid var(--border);}
.trending-item:last-child{border-bottom:none;}
.trend-num{font-size:0.72rem;font-weight:700;color:var(--txt-3);width:16px;flex-shrink:0;margin-top:2px;}
.trend-text{font-size:0.82rem;color:var(--txt-2);line-height:1.5;cursor:pointer;}
.trend-text:hover{color:var(--blue);}
.trend-count{font-size:0.7rem;color:var(--txt-3);}
.member-item{display:flex;align-items:center;gap:10px;margin-bottom:12px;}
.member-ava{width:34px;height:34px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:0.8rem;font-weight:700;color:#fff;flex-shrink:0;}
.member-name{font-size:0.82rem;font-weight:500;color:var(--txt);}
.member-skill{font-size:0.72rem;color:var(--txt-3);}
.follow-btn{
  margin-left:auto;font-size:0.72rem;padding:4px 12px;
  border-radius:50px;border:1px solid var(--border);color:var(--txt-3);
  cursor:pointer;background:transparent;transition:all var(--t);flex-shrink:0;
}
.follow-btn:hover{border-color:var(--blue);color:var(--blue);}

#page-funding{padding:80px 0;}
.funding-layout{display:grid;grid-template-columns:1fr 1fr;gap:24px;align-items:start;}
.funding-section-title{font-size:0.78rem;font-weight:600;text-transform:uppercase;letter-spacing:1.5px;color:var(--txt-3);margin-bottom:16px;}
.funding-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:14px;}
.funding-card{
  border:1px solid var(--border);border-radius:var(--r);
  padding:16px;background:var(--bg-card);display:flex;flex-direction:column;gap:8px;
}
.funding-title{font-size:0.95rem;font-weight:700;color:var(--txt);}
.funding-meta{display:flex;flex-wrap:wrap;gap:8px;font-size:0.76rem;color:var(--txt-3);}
.funding-desc{font-size:0.84rem;color:var(--txt-2);line-height:1.6;}
.funding-tag{display:inline-flex;align-items:center;gap:6px;font-size:0.72rem;padding:4px 10px;border-radius:50px;background:rgba(127,127,127,0.06);color:var(--txt-2);border:1px solid var(--border);}
.funding-form .form-row{display:grid;grid-template-columns:1fr 1fr;gap:16px;}
.funding-form .form-group{margin-bottom:16px;}
.kb-embed{
  border:1px solid var(--border);
  border-radius:var(--r);
  overflow:hidden;
  background:var(--bg-card);
}
.kb-frame{
  width:100%;
  height:276vh;
  min-height:2460px;
  border:none;
  display:block;
}

#page-offline{padding:80px 0;}
.offline-layout{display:grid;grid-template-columns:280px 1fr;gap:28px;align-items:start;}
.region-selector{
  background:var(--glass);border:1px solid var(--border);border-radius:var(--r);
  padding:20px;position:sticky;top:80px;
}
.rs-title{font-size:0.8rem;font-weight:600;color:var(--txt);margin-bottom:16px;}
.rs-search{
  display:flex;align-items:center;gap:8px;
  background:rgba(127,127,127,0.06);border:1px solid var(--border);
  border-radius:var(--r-sm);padding:8px 12px;margin-bottom:16px;
}
.rs-search input{background:transparent;border:none;outline:none;color:var(--txt);font-size:0.82rem;width:100%;font-family:'Noto Sans SC',sans-serif;}
.rs-search i{color:var(--txt-3);font-size:0.8rem;flex-shrink:0;}
.rs-section{margin-bottom:14px;}
.rs-section-name{font-size:0.68rem;font-weight:600;color:var(--txt-3);text-transform:uppercase;letter-spacing:1.5px;margin-bottom:8px;}
.rs-region{
  display:flex;align-items:center;justify-content:space-between;
  padding:9px 10px;border-radius:var(--r-sm);cursor:pointer;
  transition:all var(--t);font-size:0.84rem;color:var(--txt-2);
}
.rs-region:hover{background:rgba(127,127,127,0.06);color:var(--txt);}
.rs-region.active{background:var(--blue-dim);color:var(--blue);}
.rs-count{font-size:0.7rem;color:var(--txt-3);}
.rs-region.active .rs-count{color:rgba(59,130,246,0.6);}

.offline-map{
  background:var(--glass);border:1px solid var(--border);border-radius:var(--r);
  height:280px;margin-bottom:24px;overflow:hidden;position:relative;
  display:flex;align-items:center;justify-content:center;
}
.map-placeholder{text-align:center;}
.map-placeholder i{font-size:3rem;color:var(--border);margin-bottom:12px;}
.map-placeholder p{font-size:0.85rem;color:var(--txt-3);}
.map-pins{position:absolute;inset:0;}
.map-pin{position:absolute;cursor:pointer;display:flex;flex-direction:column;align-items:center;gap:4px;}
.pin-dot{
  width:14px;height:14px;border-radius:50%;background:var(--blue);
  box-shadow:none;
  animation:none;
}
.pin-label{
  font-size:0.68rem;color:var(--blue);font-weight:600;
  background:var(--bg);padding:2px 7px;border-radius:4px;
  border:1px solid rgba(59,130,246,0.3);white-space:nowrap;
}
.events-list{display:flex;flex-direction:column;gap:14px;}
.event-card{
  background:var(--glass);border:1px solid var(--border);border-radius:var(--r);
  padding:22px;display:flex;gap:20px;cursor:pointer;transition:all var(--t);
}
.event-card:hover{transform:translateX(4px);border-color:rgba(59,130,246,0.3);}
.event-date{
  text-align:center;min-width:54px;
  background:var(--blue-dim);border:1px solid rgba(59,130,246,0.2);
  border-radius:var(--r-sm);padding:10px 12px;height:fit-content;
}
.event-month{font-size:0.68rem;font-weight:600;color:var(--blue);text-transform:uppercase;}
.event-day{font-size:1.7rem;font-weight:800;color:var(--txt);line-height:1;font-family:Arial,Helvetica,sans-serif;font-variant-numeric:tabular-nums;}
.event-body{flex:1;}
.event-title{font-size:0.98rem;font-weight:600;color:var(--txt);margin-bottom:6px;}
.event-meta{display:flex;align-items:center;gap:16px;margin-bottom:8px;}
.event-meta span{display:flex;align-items:center;gap:5px;font-size:0.78rem;color:var(--txt-3);}
.event-desc{font-size:0.82rem;color:var(--txt-3);line-height:1.6;}
.event-join{
  align-self:center;flex-shrink:0;
  padding:8px 18px;border-radius:50px;font-size:0.78rem;font-weight:500;
  background:transparent;border:1px solid var(--border);color:var(--txt-2);
  cursor:pointer;transition:all var(--t);
}
.event-join:hover{background:var(--blue);border-color:var(--blue);color:#fff;}
.event-join.full{background:rgba(249,115,22,0.1);border-color:rgba(249,115,22,0.3);color:var(--orange);}

.auth-box{
  position:relative;z-index:2;
  background:var(--glass);border:1px solid var(--border);border-radius:20px;
  padding:48px 44px;width:100%;max-width:440px;
  backdrop-filter:none;
}
.auth-logo{
  display:flex;align-items:center;gap:10px;
  font-family:'Syne',sans-serif;font-size:1.15rem;font-weight:800;
  color:var(--txt);margin-bottom:32px;justify-content:center;
}
.auth-tabs{
  display:flex;background:rgba(127,127,127,0.06);border-radius:10px;padding:4px;margin-bottom:28px;
}
.auth-tab{
  flex:1;padding:9px 0;text-align:center;border-radius:8px;
  font-size:0.88rem;font-weight:500;cursor:pointer;color:var(--txt-2);transition:all var(--t);
}
.auth-tab.active{background:var(--blue);color:#fff;}
.auth-form{display:none;}
.auth-form.active{display:block;}
.form-group{margin-bottom:16px;}
.form-label{display:block;font-size:0.8rem;color:var(--txt-2);margin-bottom:7px;font-weight:500;}
.form-input{
  width:100%;padding:12px 16px;
  background:rgba(127,127,127,0.06);border:1px solid var(--border);border-radius:var(--r-sm);
  color:var(--txt);font-size:0.88rem;outline:none;
  font-family:'Noto Sans SC',sans-serif;transition:border-color var(--t);
}
.form-input:focus{border-color:var(--blue);}
.form-input::placeholder{color:var(--txt-3);}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:12px;}
.form-submit{
  width:100%;padding:13px;border-radius:var(--r-sm);
  background:var(--blue);color:#fff;font-size:0.92rem;font-weight:600;
  border:none;cursor:pointer;margin-top:6px;
  box-shadow:0 4px 20px rgba(59,130,246,0.3);transition:all var(--t);
}
.form-submit:hover{box-shadow:0 6px 24px rgba(59,130,246,0.5);transform:translateY(-1px);}
.auth-divider{
  display:flex;align-items:center;gap:12px;margin:20px 0;font-size:0.78rem;color:var(--txt-3);
}
.auth-divider::before,.auth-divider::after{content:'';flex:1;height:1px;background:var(--border);}
.social-logins{display:grid;grid-template-columns:1fr 1fr;gap:10px;}
.social-login{
  display:flex;align-items:center;justify-content:center;gap:8px;
  padding:10px;border:1px solid var(--border);border-radius:var(--r-sm);
  font-size:0.82rem;color:var(--txt-2);cursor:pointer;background:transparent;transition:all var(--t);
}
.social-login:hover{border-color:rgba(59,130,246,0.4);color:var(--txt);}
.form-hint{font-size:0.75rem;color:var(--txt-3);text-align:center;margin-top:18px;}
.form-hint a{color:var(--blue);}
.form-check{display:flex;align-items:center;gap:8px;font-size:0.78rem;color:var(--txt-3);margin:4px 0;}
.form-check input{accent-color:var(--blue);}
.captcha-row{display:flex;gap:10px;}
.captcha-input{flex:1;}
.captcha-btn{
  padding:12px 16px;border-radius:var(--r-sm);font-size:0.78rem;font-weight:500;
  border:1px solid var(--border);color:var(--txt-2);cursor:pointer;
  background:transparent;transition:all var(--t);white-space:nowrap;flex-shrink:0;
}
.captcha-btn:hover{border-color:var(--blue);color:var(--blue);}

#site-footer {
  background: var(--bg-2);
  border-top: 1px solid var(--border);
  padding: 64px 0 0;
  margin-top: 0;
  position: relative;
  overflow: hidden;
}
#site-footer::before {
  content: none;
}

.footer-inner {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: 48px;
  padding-bottom: 48px;
}

.footer-brand .footer-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: 'Syne', sans-serif;
  font-size: 1.15rem;
  font-weight: 800;
  color: var(--txt);
  margin-bottom: 14px;
}
.footer-brand .footer-logo .logo-dot {
  width: 10px; height: 10px; border-radius: 50%;
  background: var(--blue);
  box-shadow: none;
  animation: none;
}
.footer-brand p {
  font-size: 0.84rem;
  color: var(--txt-3);
  line-height: 1.75;
  max-width: 260px;
  margin-bottom: 22px;
}
.footer-social {
  display: flex;
  gap: 10px;
}
.footer-social a {
  width: 36px; height: 36px;
  border-radius: 50%;
  background: var(--glass);
  border: 1px solid var(--border);
  display: flex; align-items: center; justify-content: center;
  color: var(--txt-3);
  font-size: 0.85rem;
  transition: all var(--t);
  backdrop-filter: none;
}
.footer-social a:hover {
  border-color: var(--blue);
  color: var(--blue);
  transform: translateY(-3px);
  box-shadow: 0 6px 16px rgba(59,130,246,0.2);
}
.footer-qr-container {
  display: flex;
  gap: 20px;
  margin-top: 16px;
}
.footer-qr{
  width:100px;
}
.qr-img-wrapper {
  width: 100px;
  height: 100px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: var(--glass);
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}
.footer-qr img{
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}
.qr-placeholder {
  font-size: 2rem;
  color: var(--txt-3);
  opacity: 0.5;
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
}
.footer-qr-label{
  margin-top:8px;
  font-size:0.8rem;
  color:var(--txt-3);
  text-align:center;
}
.footer-social-img{
  width:16px;
  height:16px;
  border-radius:4px;
  display:block;
}
.footer-intro{
  border:1px solid var(--border);
  border-radius:var(--r);
  background:var(--bg-card);
  padding:18px 20px;
}
.footer-intro-title{
  font-size:0.9rem;
  font-weight:700;
  color:var(--txt);
  margin-bottom:8px;
}
.footer-intro p{
  font-size:0.84rem;
  color:var(--txt-2);
  line-height:1.8;
}

.footer-col-title {
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1.8px;
  color: var(--txt);
  margin-bottom: 18px;
}
.footer-col ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.footer-col ul li a {
  font-size: 0.84rem;
  color: var(--txt-3);
  transition: color var(--t);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.footer-col ul li a:hover {
  color: var(--blue);
}
.footer-col ul li a i {
  font-size: 0.7rem;
  opacity: 0.5;
}

.footer-links-section {
  padding: 24px 0;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  margin-bottom: 0;
}
.footer-links-label {
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 2px;
  color: var(--txt-3);
  margin-bottom: 14px;
}
.footer-links-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 0;
}
.footer-links-list a {
  font-size: 0.8rem;
  color: var(--txt-3);
  padding: 4px 14px 4px 0;
  transition: color var(--t);
  position: relative;
}
.footer-links-list a:not(:last-child)::after {
  content: '·';
  position: absolute;
  right: 4px;
  color: var(--border);
}
.footer-links-list a:hover {
  color: var(--blue);
}

.footer-bottom {
  padding: 20px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}
.footer-copyright {
  font-size: 0.78rem;
  color: var(--txt-3);
  display: flex;
  align-items: center;
  gap: 6px;
}
.footer-copyright .heart {
  color: #f43f5e;
  animation: none;
  display: inline-block;
}
.footer-legal {
  display: flex;
  align-items: center;
  gap: 20px;
}
.footer-legal a {
  font-size: 0.78rem;
  color: var(--txt-3);
  transition: color var(--t);
}
.footer-legal a:hover {
  color: var(--blue);
}
.footer-icp {
  font-size: 0.75rem;
  color: var(--txt-3);
  display: flex;
  align-items: center;
  gap: 6px;
  opacity: 0.7;
}
.footer-icp i { font-size: 0.7rem; }

.hamburger{display:none;flex-direction:column;gap:5px;cursor:pointer;padding:4px;}
.hamburger span{display:block;width:22px;height:2px;background:var(--txt);border-radius:2px;transition:all var(--t);}
.hamburger.open span:nth-child(1){transform:translateY(7px) rotate(45deg);}
.hamburger.open span:nth-child(2){opacity:0;}
.hamburger.open span:nth-child(3){transform:translateY(-7px) rotate(-45deg);}
.mobile-menu{
  display:none;position:fixed;inset:0;background:rgba(5,6,15,0.97);
  z-index:800;flex-direction:column;align-items:center;justify-content:center;gap:8px;
}
[data-theme="light"] .mobile-menu{background:rgba(240,244,255,0.97);}
.mobile-menu.open{display:flex;}
.mobile-menu a{font-size:1.2rem;font-weight:600;color:var(--txt);padding:12px 32px;border-radius:var(--r);}
.mobile-menu a:hover,.mobile-menu a.active{color:var(--blue);background:var(--blue-dim);}

@media(max-width:1024px){
  .ai-tools-grid{grid-template-columns:repeat(3,1fr);}
  .guide-layout{grid-template-columns:1fr;}
  .guide-sidebar{position:relative;top:0;}
  .news-layout{grid-template-columns:1fr;}
  .news-detail{position:relative;top:auto;max-height:none;}
  .home-section{padding:28px;}
  .eco-grid{grid-template-columns:repeat(2,1fr);}
  .empower-grid{grid-template-columns:repeat(2,1fr);}
  .funding-layout{grid-template-columns:1fr;}
  .funding-grid{grid-template-columns:1fr;}
  .offline-layout{grid-template-columns:1fr;}
  .region-selector{position:relative;top:0;}
  .home-features{grid-template-columns:repeat(2,1fr);}
  .home-stats{grid-template-columns:repeat(2,1fr);}
  .hs:nth-child(2){border-right:none;}
  .hs:nth-child(3){border-top:1px solid var(--border);}
  .hs:nth-child(4){border-top:1px solid var(--border);}
  .api-split{grid-template-columns:1fr;}
  .api-models-grid{grid-template-columns:repeat(3,1fr);}
  .api-stats-bar{grid-template-columns:repeat(2,1fr);}
  .api-stat:nth-child(2){border-right:none;}
  .api-stat:nth-child(3){border-top:1px solid var(--border);}
  .api-stat:nth-child(4){border-top:1px solid var(--border);}
  .footer-inner{grid-template-columns:1fr 1fr;gap:32px;}
  .footer-brand{grid-column:1/2;}
}
@media(max-width:900px){
  #topnav{padding:0 20px;}
  .hero-body{padding:64px 0 48px;}
  .api-models-grid{grid-template-columns:repeat(3,1fr);}
}
@media(max-width:768px){
  .btn-theme,.auth-modal-close{width:44px;height:44px;}
  .btn-pri,.btn-sec,.btn-login,.btn-signup,.nav-cat,.case-tab,.gs-btn,.compose-submit,.event-join,.follow-btn,.auth-tab,.form-submit,.social-login,.menu-item,.mobile-menu a,.nav-links li a,.news-page,.news-cat{min-height:44px;}
  .form-input{min-height:44px;}
  .post-act{min-height:44px;padding:10px 4px;align-items:center;}
  .footer-col ul li a,.footer-legal a,.footer-links-list a{display:inline-flex;align-items:center;min-height:44px;}
}
@media(max-width:680px){
  .nav-links,.nav-right{display:none;}
  .hamburger{display:flex;margin-left:auto;}
  .ai-tools-grid{grid-template-columns:repeat(2,1fr);}
  .home-features{grid-template-columns:1fr;}
  .home-section{padding:22px;margin:28px 0 60px;}
  .eco-grid{grid-template-columns:1fr;}
  .empower-grid{grid-template-columns:1fr;}
  .home-stats{grid-template-columns:repeat(2,1fr);}
  .hs{border-right:none;border-top:1px solid var(--border);}
  .hs:nth-child(2){border-right:none;border-top:none;}
  .hs:nth-child(1), .hs:nth-child(2){border-top:none;}
  .hs:nth-child(3), .hs:nth-child(4){border-top:1px solid var(--border);}
  .cases-grid{grid-template-columns:1fr;}
  .news-card{padding:16px;}
  .news-detail{padding:16px;}
  .funding-form .form-row{grid-template-columns:1fr;}
  .auth-box{padding:32px 24px;}
  .form-row{grid-template-columns:1fr;}
  .social-logins{grid-template-columns:1fr;}
  .api-models-grid{grid-template-columns:repeat(2,1fr);}
  .api-stats-bar{grid-template-columns:1fr;}
  .api-stat{border-right:none;border-top:1px solid var(--border);}
  .api-stat:first-child{border-top:none;}
  .footer-inner{grid-template-columns:1fr;}
  .footer-brand{grid-column:auto;}
  .footer-bottom{flex-direction:column;align-items:flex-start;gap:10px;}
  .footer-legal{flex-wrap:wrap;gap:12px;}
  .footer-qr-container{flex-wrap:wrap;gap:12px;}
  .hero-h1{font-size:2.4rem;line-height:1.2;}
  .hero-p{font-size:1rem;}
}
@media(max-width:480px){
  html{font-size:15px;}
  .wrap{padding:0 16px;}
  .hero-h1{letter-spacing:-1px;}
  .hero-btns{gap:10px;}
  .btn-pri,.btn-sec{padding:12px 20px;}
  .feature-card{padding:26px 22px;}
  .api-panel{padding:32px 26px;}
  .auth-box{padding:26px 18px;}
}
@media(max-width:360px){
  .btn-pri,.btn-sec{width:100%;justify-content:center;}
  .api-models-grid{grid-template-columns:1fr;}
}
@media (prefers-reduced-motion: reduce){
  *{transition:none !important;animation:none !important;}
  html{scroll-behavior:auto;}
}