/* ===== 不单官网 - Material 风 v2（2026-08-17） ===== */
*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:'Plus Jakarta Sans','PingFang SC','Microsoft YaHei',-apple-system,sans-serif;background:#f9f9f9;color:#1a1c1c;-webkit-font-smoothing:antialiased;overscroll-behavior:none}
a{text-decoration:none;color:inherit}
img{max-width:100%;display:block}
ul{list-style:none}
::-webkit-scrollbar{display:none}
section{scroll-margin-top:64px}

/* ===== Nav ===== */
.nav{position:fixed;top:0;left:0;right:0;z-index:50;background:rgba(249,249,249,.8);backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);box-shadow:0 1px 8px rgba(0,0,0,.04);height:64px}
.nav-inner{max-width:1280px;margin:0 auto;display:flex;align-items:center;justify-content:space-between;padding:0 24px;height:64px}
.nav-logo{display:flex;align-items:center;gap:10px}
.nav-logo .logo-icon{width:36px;height:36px;background:#ffcc00;border-radius:10px;display:flex;align-items:center;justify-content:center;font-size:18px;font-weight:800;color:#6f5700}
.nav-logo .logo-text{font-size:13px;font-weight:700;letter-spacing:2px;text-transform:uppercase;color:#1a1c1c}
.nav-links{display:flex;align-items:center;gap:32px}
.nav-links a{font-size:14px;font-weight:500;color:#666;transition:color .2s;cursor:pointer}
.nav-links a:hover{color:#1a1c1c;font-weight:700}
.nav-links a.active{color:#1a1c1c;font-weight:700}
.nav-toggle{display:none;flex-direction:column;gap:4px;cursor:pointer;padding:8px}
.nav-toggle span{display:block;width:22px;height:2px;background:#1a1c1c;border-radius:2px}

/* ===== Hero ===== */
.hero{min-height:90vh;display:flex;align-items:center;padding:120px 24px 80px;position:relative;overflow:hidden;background:#f9f9f9}
.hero-bg{position:absolute;inset:0;pointer-events:none;z-index:0;overflow:hidden}
.hero-blob1{position:absolute;top:25%;right:-15%;width:800px;height:800px;border-radius:50%;background:rgba(255,204,0,.15);filter:blur(80px)}
.hero-blob2{position:absolute;bottom:25%;left:-15%;width:600px;height:600px;border-radius:50%;background:rgba(255,218,168,.3);filter:blur(80px)}
.hero-inner{max-width:1280px;margin:0 auto;display:grid;grid-template-columns:3fr 2fr;gap:24px;align-items:center;width:100%;position:relative;z-index:10}
.hero-left{display:flex;flex-direction:column;align-items:flex-start;gap:32px}
.hero-badge{display:flex;align-items:center;gap:12px}
.hero-badge span{padding:6px 16px;border-radius:999px;background:#e8e8e8;font-size:12px;font-weight:600;letter-spacing:1px;text-transform:uppercase;color:#4e4632}
.hero-badge .line{height:1px;width:64px;background:#d2c5ab}
.hero-title{font-size:clamp(36px,5vw,60px);font-weight:800;line-height:1.1;letter-spacing:-.02em;max-width:800px;position:relative;z-index:10}
.hero-title .hl{position:relative;display:inline-block}
.hero-title .hl span{position:relative;z-index:10}
.hero-title .hl::after{content:'';position:absolute;bottom:4px;left:0;width:100%;height:28px;background:#ffcc00;z-index:-1;transform:rotate(-2deg)}
.hero-subtitle{font-size:18px;font-weight:400;color:#666;line-height:1.6;max-width:560px}
.hero-buttons{display:flex;flex-wrap:wrap;gap:16px;padding-top:16px}
.btn{display:inline-flex;align-items:center;gap:10px;padding:16px 32px;border-radius:999px;font-size:14px;font-weight:600;border:none;cursor:pointer;transition:all .3s}
.btn-brand{background:#ffcc00;color:#6f5700;box-shadow:0 4px 20px rgba(255,204,0,.3)}
.btn-brand:hover{box-shadow:0 8px 30px rgba(255,204,0,.4);transform:translateY(-2px)}
.btn-outline{background:transparent;color:#1a1c1c;border:2px solid #e8e8e8}
.btn-outline:hover{background:#f3f3f3}
.btn-dark{background:#1a1c1c;color:#fff}
.btn-dark:hover{transform:translateY(-2px)}

/* ===== iPhone 框架 ===== */
.hero-visual{display:flex;justify-content:center;align-items:center;position:relative}
.iphone-frame{width:280px;height:570px;position:relative;z-index:20}
.iphone-frame svg{width:100%;height:100%;display:block}
.iphone-screen{position:absolute;top:18px;left:18px;right:18px;bottom:18px;border-radius:32px;overflow:hidden;background:#000}
.iphone-screen img{width:100%;height:100%;object-fit:cover;display:block}

/* ===== 功能展示 ===== */
.features{background:#f9f9f9;padding:120px 24px}
.features-inner{max-width:1280px;margin:0 auto}
.features-head{display:flex;flex-direction:column;gap:32px;margin-bottom:80px}
.features-head h2{font-size:clamp(28px,4vw,48px);font-weight:700;line-height:1.2;max-width:600px}
.features-head h2 .hl{color:#745b00}
.features-head p{font-size:16px;color:#666;line-height:1.6;max-width:480px}

/* 功能轮播 */
.carousel-wrap{position:relative;max-width:380px;margin:0 auto;overflow:hidden;border-radius:24px}
.carousel-track{display:flex;transition:transform .5s ease}
.carousel-slide{flex:0 0 100%;min-width:0;text-align:center;padding:10px}
.carousel-slide .pic{width:260px;height:460px;margin:0 auto;border-radius:32px;overflow:hidden;border:1px solid #eee;box-shadow:0 10px 40px rgba(0,0,0,.12);position:relative}
.carousel-slide .pic .screen-inner{position:absolute;inset:4px;border-radius:28px;overflow:hidden;background:#fff}
.carousel-slide .pic .screen-inner img{width:100%;height:100%;object-fit:cover}
.carousel-slide .pic .notch{position:absolute;top:0;left:50%;transform:translateX(-50%);width:100px;height:24px;background:#000;border-radius:0 0 14px 14px;z-index:5}
.carousel-slide h3{font-size:20px;font-weight:700;margin-top:24px;color:#1a1c1c}
.carousel-slide p{font-size:14px;color:#888;margin-top:4px}
.carousel-btn{position:absolute;top:40%;z-index:2;background:#fff;border:none;width:48px;height:48px;border-radius:999px;cursor:pointer;font-size:24px;color:#333;display:flex;align-items:center;justify-content:center;box-shadow:0 2px 12px rgba(0,0,0,.12);transition:all .2s}
.carousel-btn:hover{box-shadow:0 4px 20px rgba(0,0,0,.2)}
.carousel-prev{left:-8px}
.carousel-next{right:-8px}
.carousel-dots{display:flex;justify-content:center;gap:6px;margin-top:20px}
.carousel-dot{width:8px;height:8px;border-radius:999px;background:#ddd;border:none;cursor:pointer;padding:0;transition:all .3s}
.carousel-dot.active{background:#ffcc00;width:32px;border-radius:4px}

/* ===== 下载区 ===== */
.download{background:#1a1c1c;padding:120px 24px;position:relative;overflow:hidden}
.download::before{content:'';position:absolute;top:0;left:0;width:100%;height:100%;background:radial-gradient(#2a2c2c 1px,transparent 1px);background-size:32px 32px;opacity:.03;pointer-events:none}
.download-inner{max-width:1280px;margin:0 auto;position:relative;z-index:10}
.download-head{text-align:center;margin-bottom:60px}
.download-head .online{display:inline-flex;align-items:center;gap:12px;padding:8px 24px;border-radius:999px;border:1px solid rgba(255,255,255,.15);margin-bottom:48px}
.download-head .online .dot{width:8px;height:8px;border-radius:50%;background:#ffcc00;animation:pulse 2s infinite}
.download-head .online span{font-size:12px;font-weight:600;letter-spacing:2px;text-transform:uppercase;color:rgba(255,255,255,.7)}
@keyframes pulse{0%,100%{opacity:1}50%{opacity:.3}}
.download-head h2{font-size:clamp(48px,8vw,120px);font-weight:800;line-height:1;color:#fff;margin-bottom:48px;letter-spacing:-.03em}
.download-head p{font-size:18px;color:rgba(255,255,255,.7);max-width:600px;margin:0 auto;line-height:1.6}
.download-body{max-width:1080px;margin:0 auto;display:grid;grid-template-columns:1fr 1.4fr;gap:48px;align-items:center}
.download-qr-card{background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.1);border-radius:32px;padding:40px;text-align:center;backdrop-filter:blur(20px)}
.download-qr-card .qrcode{width:180px;height:180px;margin:0 auto 20px;border-radius:16px;overflow:hidden;background:#fff;padding:10px}
.download-qr-card .qrcode img{width:100%;height:100%;object-fit:contain}
.download-qr-card h3{font-size:20px;font-weight:800;color:#fff;margin-bottom:4px}
.download-qr-card p{color:rgba(255,255,255,.5);font-size:13px}
.download-stores{display:flex;flex-direction:column;gap:16px}
.download-stores .stores-label{font-size:13px;font-weight:700;letter-spacing:2px;text-transform:uppercase;color:rgba(255,255,255,.5);margin-bottom:4px}
.store-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}
.store-item{display:flex;align-items:center;gap:14px;padding:16px 18px;border-radius:16px;background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.1);color:#fff;transition:all .25s;cursor:pointer}
.store-item:hover{background:rgba(255,204,0,.15);border-color:#ffcc00;transform:translateY(-2px)}
.store-item .store-icon{width:40px;height:40px;border-radius:10px;background:#ffcc00;display:flex;align-items:center;justify-content:center;font-size:20px;flex-shrink:0}
.store-item:nth-child(2n) .store-icon{background:#fff}
.store-item .store-name{font-size:14px;font-weight:600}
.store-item .store-desc{font-size:11px;color:rgba(255,255,255,.4);margin-top:2px}
.download-grid{display:grid;grid-template-columns:1fr 1fr;gap:32px;max-width:800px;margin:40px auto 0}
.download-card{background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.1);border-radius:32px;padding:48px 36px;text-align:center;backdrop-filter:blur(20px);transition:transform .3s}
.download-card:hover{transform:translateY(-4px)}
.download-card .icon{width:64px;height:64px;background:#ffcc00;border-radius:18px;display:flex;align-items:center;justify-content:center;margin:0 auto 20px;font-size:28px}
.download-card:last-child .icon{background:#fff}
.download-card h3{font-size:22px;font-weight:800;color:#fff;margin-bottom:4px}
.download-card .ver{color:rgba(255,255,255,.5);font-size:13px;margin-bottom:24px}
.download-card .qr{width:160px;height:160px;margin:0 auto 24px;border-radius:16px;overflow:hidden;background:#fff;padding:8px}
.download-card .qr img{width:100%;height:100%;object-fit:contain}
.download-card .btn{width:100%;justify-content:center;font-size:15px;padding:14px 28px}

/* ===== 联系我们 ===== */
.contact{padding:120px 24px;background:#f9f9f9}
.contact-inner{max-width:900px;margin:0 auto}
.contact-inner h2{font-size:clamp(28px,4vw,48px);font-weight:700;text-align:center;margin-bottom:16px}
.contact-inner .sub{text-align:center;color:#666;font-size:18px;margin-bottom:60px;line-height:1.6}
.contact-content{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:start}
.contact-left{display:flex;flex-direction:column;gap:32px}
.contact-item{display:flex;flex-direction:column;align-items:flex-start;gap:12px}
.contact-item .icon{width:48px;height:48px;border-radius:50%;background:#e8e8e8;display:flex;align-items:center;justify-content:center;font-size:22px}
.contact-item h4{font-size:14px;font-weight:600;letter-spacing:1px;text-transform:uppercase;color:#666}
.contact-item a{font-size:16px;color:#1a1c1c;transition:color .2s}
.contact-item a:hover{color:#745b00}
.contact-form{background:#fff;border:1px solid #eee;border-radius:24px;padding:36px}
.contact-form h3{font-size:18px;font-weight:700;margin-bottom:24px;text-align:center}
.contact-form input,.contact-form textarea{width:100%;padding:14px 16px;background:#f5f5f5;border:1px solid transparent;border-radius:12px;font-size:14px;font-family:inherit;color:#1a1c1c;transition:all .2s;margin-bottom:14px}
.contact-form input:focus,.contact-form textarea:focus{outline:none;border-color:#ffcc00;background:#fff;box-shadow:0 0 0 4px rgba(255,204,0,.12)}
.contact-form textarea{height:120px;resize:vertical}
.contact-form .btn{width:100%;justify-content:center;padding:14px}

/* ===== Footer ===== */
.footer{background:#f9f9f9;border-top:1px solid #e8e8e8;padding:48px 24px 32px}
.footer-inner{max-width:1280px;margin:0 auto;display:flex;flex-direction:column;align-items:center;gap:24px}
.footer-inner span{font-size:12px;font-weight:500;letter-spacing:1px;text-transform:uppercase;color:#999}
.footer-bottom{font-size:12px;color:#999}
.footer-bottom a{color:#999;margin:0 8px}
.footer-bottom a:hover{color:#745b00}

@media(max-width:860px){
  .hero-inner{grid-template-columns:1fr;text-align:center;gap:40px}
  .hero-left{align-items:center}
  .hero-buttons{justify-content:center}
  .contact-content{grid-template-columns:1fr}
  .download-grid{grid-template-columns:1fr}
  .features-head{align-items:center;text-align:center}
  .features-head p{margin:0 auto}
  .iphone-frame{width:220px;height:450px}
}
@media(max-width:768px){
  .nav-links{display:none}
  .nav-toggle{display:flex}
  .nav-links.open{display:flex;flex-direction:column;position:absolute;top:64px;left:0;right:0;background:#f9f9f9;padding:16px;gap:4px;border-bottom:1px solid #eee;box-shadow:0 4px 12px rgba(0,0,0,.06)}
  .nav-links.open a{padding:10px 14px;border-radius:8px;width:100%}
  .download-head h2{font-size:48px}
  .carousel-slide .pic{width:200px;height:360px}
}
@media(max-width:480px){
  .hero-title{font-size:32px}
  .hero-buttons{flex-direction:column;width:100%}
  .hero-buttons .btn{width:100%;justify-content:center}
  .download-head h2{font-size:36px}
  .download-card .qr{width:140px;height:140px}
  .iphone-frame{width:180px;height:370px}
}