@font-face{font-family:'Noto Sans SC';font-style:normal;font-weight:300;src:local('Noto Sans SC Light'),local('NotoSansSC-Light')}
@font-face{font-family:'Noto Sans SC';font-style:normal;font-weight:400;src:local('Noto Sans SC Regular'),local('NotoSansSC-Regular')}
@font-face{font-family:'Noto Sans SC';font-style:normal;font-weight:500;src:local('Noto Sans SC Medium'),local('NotoSansSC-Medium')}
@font-face{font-family:'Noto Sans SC';font-style:normal;font-weight:700;src:local('Noto Sans SC Bold'),local('NotoSansSC-Bold')}
@font-face{font-family:'Noto Serif SC';font-style:normal;font-weight:600;src:local('Noto Serif SC SemiBold'),local('NotoSerifSC-SemiBold')}
@font-face{font-family:'Noto Serif SC';font-style:normal;font-weight:700;src:local('Noto Serif SC Bold'),local('NotoSerifSC-Bold')}
:root{--blue:#007AFF;--blue-dark:#005EC4;--blue-light:#4DA3FF;--blue-glow:rgba(0,122,255,0.15);--bg:#F5F7FF;--surface:#ffffff;--text:#1C1C1E;--text-secondary:#6B7280;--text-muted:#9CA3AF;--border:#E5EAF0;--radius:16px;--radius-sm:10px;--shadow:0 4px 24px rgba(0,122,255,0.08);--shadow-lg:0 12px 48px rgba(0,122,255,0.12)}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;font-size:16px}
body{font-family:'Noto Sans SC',-apple-system,BlinkMacSystemFont,sans-serif;background:var(--bg);color:var(--text);line-height:1.7;overflow-x:hidden}
::selection{background:var(--blue);color:white}
nav{position:fixed;top:0;left:0;right:0;z-index:100;padding:0 40px;height:64px;display:flex;align-items:center;justify-content:space-between;background:rgba(245,247,255,0.8);backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);border-bottom:1px solid rgba(0,122,255,0.08);transition:all .3s}
.nav-logo{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--text)}
.nav-logo-icon{width:36px;height:36px;background:linear-gradient(135deg,var(--blue),var(--blue-light));border-radius:10px;display:flex;align-items:center;justify-content:center;box-shadow:0 2px 8px rgba(0,122,255,0.3)}
.nav-logo-icon svg{width:20px;height:20px}
.nav-logo-text{font-weight:700;font-size:17px;letter-spacing:-0.3px}
.nav-links{display:flex;align-items:center;gap:32px;list-style:none}
.nav-links a{text-decoration:none;color:var(--text-secondary);font-size:14px;font-weight:500;transition:color .2s}
.nav-links a:hover{color:var(--blue)}
.nav-cta{background:var(--blue)!important;color:white!important;padding:8px 20px;border-radius:20px;font-size:14px;font-weight:600;transition:all .2s;box-shadow:0 2px 8px rgba(0,122,255,0.3)}
.nav-cta:hover{background:var(--blue-dark)!important;transform:translateY(-1px);box-shadow:0 4px 16px rgba(0,122,255,0.4)}
.hero{min-height:100vh;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;padding:120px 24px 80px;position:relative;overflow:hidden}
.hero::before{content:'';position:absolute;top:-200px;left:50%;transform:translateX(-50%);width:900px;height:900px;background:radial-gradient(ellipse at center,rgba(0,122,255,0.06) 0%,transparent 70%);pointer-events:none}
.hero-badge{display:inline-flex;align-items:center;gap:6px;background:white;border:1px solid var(--border);border-radius:20px;padding:6px 16px;font-size:13px;color:var(--text-secondary);margin-bottom:32px;box-shadow:var(--shadow);animation:fadeUp .8s ease both}
.hero-badge-dot{width:6px;height:6px;background:#34C759;border-radius:50%;animation:pulse 2s infinite}
.hero h1{font-family:'Noto Serif SC',serif;font-size:clamp(42px,7vw,76px);font-weight:700;line-height:1.1;letter-spacing:-2px;color:var(--text);margin-bottom:20px;animation:fadeUp .8s .1s ease both}
.hero h1 em{font-style:normal;background:linear-gradient(135deg,var(--blue),var(--blue-light));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.hero-sub{font-size:clamp(16px,2.5vw,20px);color:var(--text-secondary);max-width:540px;margin:0 auto 40px;font-weight:300;animation:fadeUp .8s .2s ease both}
.hero-actions{display:flex;gap:16px;justify-content:center;flex-wrap:wrap;animation:fadeUp .8s .3s ease both}
.btn-primary{display:inline-flex;align-items:center;gap:8px;background:var(--blue);color:white;text-decoration:none;padding:14px 32px;border-radius:14px;font-size:16px;font-weight:600;box-shadow:0 4px 20px rgba(0,122,255,0.35);transition:all .25s}
.btn-primary:hover{background:var(--blue-dark);transform:translateY(-2px);box-shadow:0 8px 30px rgba(0,122,255,0.45)}
.btn-secondary{display:inline-flex;align-items:center;gap:8px;background:white;color:var(--text);text-decoration:none;padding:14px 32px;border-radius:14px;font-size:16px;font-weight:600;border:1.5px solid var(--border);box-shadow:var(--shadow);transition:all .25s}
.btn-secondary:hover{border-color:var(--blue);color:var(--blue);transform:translateY(-2px);box-shadow:0 8px 24px rgba(0,122,255,0.1)}
.hero-stats{display:flex;gap:48px;margin-top:64px;animation:fadeUp .8s .4s ease both}
.stat-item{text-align:center}
.stat-num{font-family:'Noto Serif SC',serif;font-size:28px;font-weight:700;color:var(--blue)}
.stat-label{font-size:13px;color:var(--text-muted);margin-top:2px}
.section{padding:100px 24px;max-width:1100px;margin:0 auto}
.section-header{text-align:center;margin-bottom:64px}
.section-label{display:inline-block;font-size:12px;font-weight:700;letter-spacing:2px;text-transform:uppercase;color:var(--blue);margin-bottom:12px}
.section-title{font-family:'Noto Serif SC',serif;font-size:clamp(28px,4vw,40px);font-weight:700;color:var(--text);letter-spacing:-1px;margin-bottom:16px}
.section-desc{font-size:16px;color:var(--text-secondary);max-width:520px;margin:0 auto;font-weight:300}
.features-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:20px}
.feature-card{background:white;border-radius:var(--radius);padding:32px;border:1px solid var(--border);transition:all .3s;position:relative;overflow:hidden}
.feature-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg);border-color:rgba(0,122,255,0.2)}
.feature-card::before{content:'';position:absolute;top:0;left:0;right:0;height:3px;background:linear-gradient(90deg,var(--blue),var(--blue-light));opacity:0;transition:opacity .3s}
.feature-card:hover::before{opacity:1}
.feature-icon{width:52px;height:52px;background:var(--blue-glow);border-radius:14px;display:flex;align-items:center;justify-content:center;margin-bottom:20px;font-size:24px}
.feature-title{font-size:18px;font-weight:700;color:var(--text);margin-bottom:10px}
.feature-desc{font-size:14px;color:var(--text-secondary);line-height:1.7}
.how-to{background:white;border-radius:24px;padding:64px;border:1px solid var(--border);box-shadow:var(--shadow);margin:0 24px}
.steps{display:flex;flex-direction:column;gap:0}
.step{display:flex;gap:28px;align-items:flex-start;position:relative;padding-bottom:40px}
.step:last-child{padding-bottom:0}
.step:not(:last-child)::after{content:'';position:absolute;left:23px;top:52px;bottom:0;width:2px;background:linear-gradient(to bottom,var(--blue) 0%,rgba(0,122,255,0.1) 100%)}
.step-num{flex-shrink:0;width:48px;height:48px;background:linear-gradient(135deg,var(--blue),var(--blue-light));border-radius:50%;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:18px;color:white;box-shadow:0 4px 12px rgba(0,122,255,0.3)}
.step-content{flex:1}
.step-title{font-size:18px;font-weight:700;color:var(--text);margin-bottom:6px;margin-top:12px}
.step-desc{font-size:14px;color:var(--text-secondary);line-height:1.7}
.step-tip{display:inline-flex;align-items:center;gap:4px;background:#FFF9E6;border:1px solid #F5D98A;border-radius:6px;padding:4px 10px;font-size:12px;color:#92700C;margin-top:8px}
.supported-section{text-align:center}
.app-logos{display:flex;justify-content:center;gap:24px;flex-wrap:wrap;margin-top:40px}
.app-logo-card{background:white;border:1.5px solid var(--border);border-radius:16px;padding:20px 36px;font-size:16px;font-weight:600;color:var(--text);box-shadow:var(--shadow);transition:all .25s}
.app-logo-card:hover{border-color:var(--blue);transform:translateY(-3px);box-shadow:var(--shadow-lg)}
.download-section{text-align:center;background:linear-gradient(135deg,#005EC4 0%,#007AFF 50%,#4DA3FF 100%);border-radius:24px;padding:80px 40px;margin:0 24px 100px;position:relative;overflow:hidden}
.download-section::before{content:'';position:absolute;top:-100px;right:-100px;width:400px;height:400px;background:radial-gradient(ellipse,rgba(255,255,255,0.1) 0%,transparent 70%);pointer-events:none}
.download-section .section-title,.download-section .section-desc{color:white}
.download-section .section-label{color:rgba(255,255,255,0.7)}
.download-section .section-desc{color:rgba(255,255,255,0.8)}
.download-qr-area{display:flex;justify-content:center;gap:48px;margin-top:40px;flex-wrap:wrap;align-items:center}
.qr-card{background:white;border-radius:16px;padding:24px;box-shadow:0 8px 32px rgba(0,0,0,0.2)}
.qr-label{font-size:13px;font-weight:600;color:var(--text-secondary);text-align:center;margin-top:12px}
.download-info{color:rgba(255,255,255,0.9);font-size:15px;margin-top:32px}
.download-info a{color:white;font-weight:600;text-decoration:underline}
footer{text-align:center;padding:40px 24px;border-top:1px solid var(--border);color:var(--text-muted);font-size:13px}
footer a{color:var(--blue);text-decoration:none}
@keyframes fadeUp{from{opacity:0;transform:translateY(24px)}to{opacity:1;transform:translateY(0)}}
@keyframes pulse{0%,100%{opacity:1}50%{opacity:.4}}
.reveal{opacity:0;transform:translateY(32px);transition:all .8s cubic-bezier(0.22,1,0.36,1)}
.reveal.visible{opacity:1;transform:translateY(0)}
.grid-bg{background-image:linear-gradient(rgba(0,122,255,0.03) 1px,transparent 1px),linear-gradient(90deg,rgba(0,122,255,0.03) 1px,transparent 1px);background-size:40px 40px}

/* ═══════════════════════════════════════
   HERO 横向轮播（完整展示截图）
═══════════════════════════════════════ */
.hero-carousel{
  margin: 48px auto 0;
  display: flex;
  align-items: center;
  gap: 16px;
  width: 100%;
  max-width: 680px;
  animation: fadeUp .8s .5s ease both;
  position: relative;
  z-index: 1;
}
.carousel-btn{
  flex-shrink: 0;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: white;
  border: 1.5px solid var(--border);
  color: var(--blue);
  font-size: 20px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all .2s;
  box-shadow: 0 2px 12px rgba(0,0,0,0.1);
  line-height: 1;
}
.carousel-btn:hover{background:var(--blue);color:#fff;border-color:var(--blue);transform:scale(1.08)}
.carousel-track-wrap{flex:1;overflow:hidden;border-radius:20px;box-shadow:0 8px 40px rgba(0,122,255,0.18)}
.carousel-track{display:flex;transition:transform .45s cubic-bezier(0.22,1,0.36,1)}
.carousel-item{flex-shrink:0;width:100%;position:relative}
.carousel-item img{
  width:100%;
  height:auto;
  max-height:540px;
  object-fit:contain;
  display:block;
  background:#f0f4ff;
  border-radius:20px;
}
.carousel-caption{
  position:absolute;
  bottom:0;left:0;right:0;
  background:linear-gradient(transparent,rgba(0,0,0,0.75));
  color:white;
  padding:56px 24px 22px;
  border-radius:0 0 20px 20px;
  font-size:14px;
  text-align:left;
  line-height:1.6;
}
.carousel-tag{
  display:inline-block;
  background:var(--blue);
  border-radius:20px;
  padding:2px 12px;
  font-size:12px;
  font-weight:700;
  margin-right:8px;
}
.carousel-dots{
  display:flex;
  justify-content:center;
  gap:6px;
  margin-top:18px;
}
.dot{width:8px;height:8px;border-radius:50%;background:var(--border);cursor:pointer;transition:all .2s}
.dot.active{background:var(--blue);width:24px;border-radius:4px}
.dot:hover:not(.active){background:var(--blue-light)}

/* ═══════════════════════════════════════
   功能截图横向滚动区（Features）
═══════════════════════════════════════ */
.features-scroll{
  display:flex;
  flex-direction:column;
  gap:32px;
  margin-top:48px;
}
.fs-item{
  background:#fff;
  border-radius:24px;
  border:1px solid var(--border);
  overflow:hidden;
  box-shadow:var(--shadow);
  transition:all .3s;
  display:grid;
  grid-template-columns:1fr 1fr;
  align-items:stretch;
  justify-items:center;
}
.fs-item:hover{transform:translateY(-4px);box-shadow:0 12px 40px rgba(0,122,255,0.12);border-color:rgba(0,122,255,0.2)}
.fs-img-wrap{
  background:#f0f4ff;
  display:flex;
  align-items:center;
  justify-content:center;
  height:100%;
}
.fs-img-wrap img{
  width:100%;
  height:100%;
  object-fit:cover;
  display:block;
  transition:transform .4s;
}
.fs-item:hover .fs-img-wrap img{transform:scale(1.03)}
.fs-text{
  padding:40px 44px;
  display:flex;
  flex-direction:column;
  justify-content:center;
  text-align:left;
}
.fs-tag{display:inline-flex;align-items:center;gap:4px;font-size:11px;font-weight:700;color:var(--blue);background:var(--blue-glow);border-radius:20px;padding:3px 10px;margin-bottom:12px}
.fs-title{font-size:22px;font-weight:700;color:var(--text);margin-bottom:12px;line-height:1.3}
.fs-desc{font-size:15px;color:var(--text-secondary);line-height:1.8}

/* ═══════════════════════════════════════
   响应式
═══════════════════════════════════════ */
@media (max-width:768px){
nav{padding:0 16px!important;height:56px}
.nav-logo-text{font-size:15px!important}
.nav-toggle{display:flex!important}
.nav-toggle:hover{background:rgba(0,122,255,0.08)}
.nav-links{position:fixed;top:56px;left:0;right:0;background:rgba(245,247,255,0.97);backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);border-bottom:1px solid var(--border);flex-direction:column;gap:0;padding:8px 0 16px;box-shadow:0 8px 24px rgba(0,0,0,0.08);transform:translateY(-110%);opacity:0;transition:all .3s cubic-bezier(0.22,1,0.36,1);pointer-events:none;z-index:99}
.nav-links.open{transform:translateY(0);opacity:1;pointer-events:all}
.nav-links li{width:100%}
.nav-links a{display:block;padding:13px 20px;font-size:15px;color:var(--text-secondary);border-radius:0}
.nav-links a:hover{background:rgba(0,122,255,0.05);color:var(--blue)}
.nav-links .nav-cta{background:none!important;color:var(--blue)!important;box-shadow:none!important;padding:13px 20px!important;border-radius:0!important;font-weight:600}
.nav-links .nav-cta:hover{background:rgba(0,122,255,0.08)!important}
.hero{padding:90px 16px 60px!important;min-height:auto!important}
.hero-badge{font-size:12px;padding:5px 14px;margin-bottom:24px}
.hero h1{letter-spacing:-1px;margin-bottom:16px}
.hero-sub{font-size:15px!important;margin-bottom:32px;line-height:1.6}
.hero-actions{flex-direction:column!important;align-items:stretch!important;gap:12px}
.hero-actions a{justify-content:center!important;font-size:15px!important;padding:13px 24px!important}
.hero-stats{flex-direction:column!important;gap:16px!important;margin-top:48px!important;width:100%}
.stat-item{background:white;border-radius:14px;padding:16px 24px;border:1px solid var(--border);box-shadow:var(--shadow)}
.stat-num{font-size:16px!important}
.section{padding:60px 16px!important}
.section-header{margin-bottom:40px!important}
.section-title{font-size:clamp(24px,6vw,32px)!important;letter-spacing:-0.5px!important}
.section-desc{font-size:15px!important;padding:0 8px}
.how-to{padding:32px 20px!important;margin:0 16px!important;border-radius:20px!important}
.step{gap:14px!important;padding-bottom:28px!important}
.step:not(:last-child)::after{top:44px!important;left:21px!important}
.step-num{width:42px!important;height:42px!important;font-size:16px!important}
.step-title{font-size:16px!important;margin-top:8px!important}
.step-desc{font-size:13px!important;line-height:1.65}
.app-logos{gap:12px!important}
.app-logo-card{padding:14px 20px!important;font-size:14px!important;border-radius:12px!important}
.download-section{padding:48px 20px!important;margin:0 12px 60px!important;border-radius:20px!important}
.download-section .section-title{font-size:clamp(22px,6vw,30px)!important}
.download-section > div[style*="flex"]{flex-direction:column!important;align-items:stretch!important;gap:12px!important}
.download-section .btn-primary{justify-content:center!important;font-size:15px!important;padding:13px 20px!important}
.download-info{font-size:13px!important;line-height:1.8!important;margin-top:24px!important}
footer{padding:28px 16px!important;font-size:12px!important;line-height:1.7}
.hero-carousel{gap:10px;max-width:100%}
.carousel-btn{width:36px;height:36px;font-size:16px}
.carousel-item img{max-height:380px}
.fs-item{grid-template-columns:1fr!important;gap:0}
.fs-img-wrap img{max-height:380px;object-fit:contain}
.fs-text{padding:20px 20px 24px!important}
.fs-title{font-size:18px!important}
.fs-desc{font-size:14px!important}
}
@media (max-width:480px){
.carousel-item img{max-height:320px}
.fs-img-wrap img{max-height:300px!important}
}
@media (max-width:400px){
.hero-stats{gap:10px!important}
.stat-item{padding:12px 16px!important}
.hero h1{font-size:36px!important}
}

/* ── 汉堡菜单按钮（桌面隐藏，移动端显示） ── */
.nav-toggle{display:none;flex-direction:column;justify-content:center;align-items:center;width:40px;height:40px;gap:5px;background:none;border:none;cursor:pointer;padding:4px;border-radius:8px;transition:background .2s}
.nav-toggle span{display:block;width:22px;height:2px;background:var(--text);border-radius:2px;transition:all .3s;transform-origin:center}
.nav-toggle.active span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.nav-toggle.active span:nth-child(2){opacity:0;transform:scaleX(0)}
.nav-toggle.active span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}