:root{
    --deep:#2E7D5B;
    --mint:#A8D5BA;
    --sprout:#C8E6C9;
    --cream:#F5F3E7;
    --amber:#D4A24C;
    --ink:#1B3A2D;
    --grey:#6B8E7B;
    --radius:20px;
    --shadow:0 10px 30px rgba(27,58,45,.10);
  }
  *{box-sizing:border-box;margin:0;padding:0;}
  html{scroll-behavior:smooth;}
  body{
    font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
    background:var(--cream);
    color:var(--ink);
    line-height:1.7;
    -webkit-font-smoothing:antialiased;
    overflow-x:hidden;
  }
  img{display:block;max-width:100%;}
  a{color:inherit;text-decoration:none;}
  .wrap{width:100%;max-width:1180px;margin:0 auto;padding:0 20px;}

  /* ---------- header ---------- */
  .site-header{
    position:sticky;top:0;z-index:50;
    background:rgba(245,243,231,.92);
    backdrop-filter:blur(10px);
    border-bottom:1px solid rgba(46,125,91,.12);
  }
  .header-inner{
    display:flex;align-items:center;justify-content:space-between;
    gap:16px;padding:12px 0;
  }
  .brand{display:flex;align-items:center;gap:10px;font-size:20px;font-weight:700;color:var(--deep);}
  .brand img{height:34px;width:auto;}
  .nav-links{display:none;gap:22px;font-size:15px;color:var(--grey);}
  .nav-links a:hover{color:var(--deep);}
  .header-actions{display:flex;align-items:center;gap:10px;}
  .search-box{
    display:flex;align-items:center;gap:6px;
    background:#fff;border:1px solid var(--mint);
    border-radius:999px;padding:7px 14px;transition:.3s;
  }
  .search-box:focus-within{box-shadow:0 0 0 4px rgba(168,213,186,.45);border-color:var(--deep);}
  .search-box input{
    border:none;outline:none;background:transparent;
    font-size:14px;color:var(--ink);width:110px;font-family:inherit;
  }
  .search-box span{color:var(--grey);font-size:14px;}
  .btn-download{
    background:var(--deep);color:#fff;font-size:14px;font-weight:600;
    padding:9px 20px;border-radius:999px;white-space:nowrap;
    transition:.25s;box-shadow:0 6px 16px rgba(46,125,91,.28);
  }
  .btn-download:hover{background:#256a4b;transform:translateY(-1px);}
  .btn-ghost{
    border:1.5px solid var(--deep);color:var(--deep);
    padding:7px 18px;border-radius:999px;font-size:14px;font-weight:600;
    transition:.25s;background:transparent;
  }
  .btn-ghost:hover{background:var(--deep);color:#fff;}

  /* ---------- hero ---------- */
  .hero{
    background:linear-gradient(170deg,#1f5c43 0%,#2E7D5B 38%,#A8D5BA 72%,#F5F3E7 100%);
    padding:54px 0 70px;position:relative;overflow:hidden;
  }
  .hero::after{
    content:"";position:absolute;right:-90px;top:-60px;width:340px;height:340px;
    background:radial-gradient(circle,rgba(255,255,255,.22),transparent 70%);border-radius:50%;
  }
  .hero-inner{position:relative;z-index:2;display:grid;gap:34px;}
  .hero-copy{color:#fff;max-width:640px;}
  .hero-kicker{
    display:inline-block;background:rgba(255,255,255,.18);
    border:1px solid rgba(255,255,255,.35);
    padding:5px 16px;border-radius:999px;font-size:13px;letter-spacing:.5px;margin-bottom:18px;
  }
  .hero h1{
    font-size:30px;line-height:1.35;font-weight:800;letter-spacing:.5px;
    margin-bottom:16px;text-shadow:0 2px 12px rgba(0,0,0,.16);
  }
  .hero p{font-size:15px;color:rgba(255,255,255,.9);margin-bottom:26px;}
  .hero-actions{display:flex;flex-wrap:wrap;gap:12px;align-items:center;}
  .btn-light{
    background:#fff;color:var(--deep);font-weight:700;font-size:15px;
    padding:12px 30px;border-radius:999px;transition:.25s;
    box-shadow:0 10px 26px rgba(0,0,0,.18);
  }
  .btn-light:hover{transform:translateY(-2px);}
  .btn-outline{
    border:1.5px solid rgba(255,255,255,.7);color:#fff;
    padding:11px 26px;border-radius:999px;font-size:15px;font-weight:600;transition:.25s;
  }
  .btn-outline:hover{background:rgba(255,255,255,.16);}

  .hero-banner{
    position:relative;border-radius:26px;overflow:hidden;
    box-shadow:0 24px 50px rgba(15,50,35,.28);
    display:flex;transition:transform .5s ease;
  }
  .hero-banner img{width:100%;height:230px;object-fit:cover;}
  .banner-caption{
    position:absolute;left:0;right:0;bottom:0;
    padding:32px 22px 18px;
    background:linear-gradient(to top,rgba(15,55,38,.85),transparent);
    color:#fff;
  }
  .banner-caption strong{display:block;font-size:17px;margin-bottom:2px;}
  .banner-caption em{font-style:normal;font-size:13px;opacity:.82;}
  .banner-dots{display:flex;gap:8px;justify-content:center;margin-top:16px;}
  .banner-dots button{
    width:9px;height:9px;border-radius:999px;border:none;cursor:pointer;
    background:rgba(255,255,255,.45);transition:.3s;padding:0;
  }
  .banner-dots button.active{width:26px;background:#fff;}

  /* ---------- section base ---------- */
  section{padding:56px 0;}
  .sec-head{margin-bottom:30px;}
  .sec-eyebrow{
    font-size:13px;letter-spacing:2px;color:var(--deep);font-weight:600;margin-bottom:6px;
  }
  .sec-head h2{font-size:24px;font-weight:800;color:var(--ink);letter-spacing:.5px;}
  .sec-head p{font-size:14px;color:var(--grey);margin-top:8px;max-width:640px;}

  /* ---------- recommend rail ---------- */
  .rail{
    display:grid;grid-auto-flow:column;grid-auto-columns:150px;
    gap:16px;overflow-x:auto;padding:6px 4px 18px;
    scroll-snap-type:x mandatory;
  }
  .rail::-webkit-scrollbar{height:6px;}
  .rail::-webkit-scrollbar-thumb{background:var(--mint);border-radius:99px;}
  .book-card{
    scroll-snap-align:start;background:#fff;border-radius:var(--radius);
    overflow:hidden;box-shadow:var(--shadow);transition:.3s;
  }
  .book-card:hover{transform:translateY(-5px);box-shadow:0 18px 34px rgba(27,58,45,.16);}
  .book-card img{width:100%;height:200px;object-fit:cover;}
  .book-card .info{padding:10px 12px 14px;}
  .book-card .tag{
    display:inline-block;font-size:11px;background:var(--sprout);color:var(--deep);
    border-radius:99px;padding:1px 9px;margin-bottom:6px;
  }
  .book-card h3{font-size:14px;font-weight:700;line-height:1.4;color:var(--ink);}
  .book-card span{font-size:12px;color:var(--grey);}

  /* ---------- categories ---------- */
  .category-section{background:linear-gradient(180deg,#EDF6EF,#F5F3E7);}
  .cat-layout{display:grid;gap:22px;}
  .cat-art{
    border-radius:26px;overflow:hidden;box-shadow:var(--shadow);position:relative;
  }
  .cat-art img{width:100%;height:100%;min-height:220px;object-fit:cover;}
  .cat-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:14px;}
  .cat-item{
    background:#fff;border-radius:18px;padding:18px 14px;
    box-shadow:0 6px 18px rgba(27,58,45,.07);transition:.28s;
    border:1px solid rgba(168,213,186,.5);
  }
  .cat-item:hover{transform:translateY(-3px);background:#fff;box-shadow:0 14px 26px rgba(27,58,45,.13);}
  .cat-item strong{display:block;font-size:15px;color:var(--deep);margin-bottom:3px;}
  .cat-item span{font-size:12px;color:var(--grey);}

  /* ---------- ranking ---------- */
  .rank-layout{display:grid;gap:22px;}
  .rank-hero{
    position:relative;border-radius:26px;overflow:hidden;box-shadow:var(--shadow);
    min-height:290px;
  }
  .rank-hero img{width:100%;height:100%;min-height:290px;object-fit:cover;}
  .rank-badge{
    position:absolute;top:16px;left:16px;background:var(--amber);color:#fff;
    font-size:12px;font-weight:700;padding:4px 14px;border-radius:999px;
  }
  .rank-hero .rank-title{
    position:absolute;left:0;right:0;bottom:0;padding:40px 20px 18px;
    background:linear-gradient(to top,rgba(15,55,38,.88),transparent);color:#fff;
  }
  .rank-hero .rank-title strong{font-size:18px;display:block;}
  .rank-hero .rank-title span{font-size:13px;opacity:.82;}
  .rank-list{background:#fff;border-radius:26px;padding:20px 18px;box-shadow:var(--shadow);}
  .rank-tabs{display:flex;gap:8px;margin-bottom:14px;}
  .rank-tabs span{
    font-size:13px;padding:6px 16px;border-radius:999px;
    background:var(--cream);color:var(--grey);font-weight:600;
  }
  .rank-tabs span.on{background:var(--deep);color:#fff;}
  .rank-row{
    display:flex;align-items:center;gap:12px;padding:11px 0;
    border-bottom:1px dashed rgba(168,213,186,.8);
  }
  .rank-row:last-child{border-bottom:none;}
  .rank-num{
    width:26px;height:26px;flex:none;border-radius:9px;background:var(--sprout);
    color:var(--deep);font-size:13px;font-weight:800;
    display:flex;align-items:center;justify-content:center;
  }
  .rank-row:nth-child(3) .rank-num{background:var(--deep);color:#fff;}
  .rank-row strong{font-size:14px;font-weight:600;color:var(--ink);}
  .rank-row small{display:block;font-size:12px;color:var(--grey);}

  /* ---------- editor picks ---------- */
  .picks{display:grid;gap:20px;}
  .pick-card{
    position:relative;border-radius:26px;overflow:hidden;box-shadow:var(--shadow);
    transition:.3s;
  }
  .pick-card:hover{transform:scale(1.012);box-shadow:0 20px 40px rgba(27,58,45,.18);}
  .pick-card img{width:100%;height:210px;object-fit:cover;}
  .pick-card .pick-text{
    position:absolute;inset:auto 0 0 0;padding:44px 20px 18px;
    background:linear-gradient(to top,rgba(15,55,38,.9),transparent);color:#fff;
  }
  .pick-text strong{font-size:17px;display:block;margin-bottom:3px;}
  .pick-text span{font-size:13px;opacity:.85;}

  /* ---------- community ---------- */
  .community-section{background:linear-gradient(180deg,#F5F3E7,#EDF6EF);}
  .comm-grid{display:grid;gap:20px;}
  .comm-card{
    background:#fff;border-radius:26px;overflow:hidden;box-shadow:var(--shadow);
    transition:.3s;
  }
  .comm-card:hover{transform:translateY(-4px);}
  .comm-card img{width:100%;height:230px;object-fit:cover;}
  .comm-body{padding:16px 18px 20px;}
  .comm-body .who{display:flex;align-items:center;gap:8px;margin-bottom:8px;}
  .avatar{
    width:30px;height:30px;border-radius:50%;background:var(--mint);
    color:var(--deep);font-size:13px;font-weight:700;
    display:flex;align-items:center;justify-content:center;
  }
  .who b{font-size:13px;color:var(--ink);}
  .who em{font-style:normal;font-size:12px;color:var(--grey);}
  .comm-body p{font-size:13.5px;color:var(--grey);}

  /* ---------- app ---------- */
  .app-section{
    background:linear-gradient(165deg,#255f47 0%,#2E7D5B 55%,#4e9975 100%);
    color:#fff;position:relative;overflow:hidden;
  }
  .app-section::before{
    content:"";position:absolute;left:-120px;bottom:-120px;width:380px;height:380px;
    background:radial-gradient(circle,rgba(200,230,201,.22),transparent 70%);border-radius:50%;
  }
  .app-inner{position:relative;z-index:2;display:grid;gap:34px;}
  .app-copy h2{font-size:25px;font-weight:800;margin-bottom:14px;letter-spacing:.5px;}
  .app-copy p{font-size:14.5px;color:rgba(255,255,255,.88);margin-bottom:10px;}
  .app-points{list-style:none;display:grid;gap:10px;margin:20px 0 26px;}
  .app-points li{
    display:flex;gap:10px;align-items:flex-start;font-size:14px;
    color:rgba(255,255,255,.92);
  }
  .app-points li::before{
    content:"";width:8px;height:8px;border-radius:50%;background:var(--amber);
    margin-top:8px;flex:none;
  }
  .app-buttons{display:flex;flex-wrap:wrap;gap:12px;align-items:center;}
  .store-btn{
    border:1.5px solid rgba(255,255,255,.75);color:#fff;
    padding:10px 22px;border-radius:999px;font-size:14px;font-weight:600;transition:.25s;
  }
  .store-btn.main{
    background:#fff;color:var(--deep);border-color:#fff;
    box-shadow:0 10px 24px rgba(0,0,0,.2);
  }
  .store-btn:hover{transform:translateY(-2px);}
  .scan-tip{margin-top:16px;font-size:12.5px;color:rgba(255,255,255,.72);}
  .app-phones{display:grid;grid-template-columns:1fr 1fr;gap:14px;align-items:end;}
  .phone{
    border-radius:22px;overflow:hidden;box-shadow:0 20px 40px rgba(0,0,0,.28);
    border:3px solid rgba(255,255,255,.35);transition:transform .4s ease;
  }
  .app-phones:hover .phone{transform:translateY(-6px);}
  .phone.tilt{transform:rotate(-4deg);}
  .app-phones:hover .phone.tilt{transform:rotate(-4deg) translateY(-6px);}
  .phone img{width:100%;height:250px;object-fit:cover;}

  /* ---------- features ---------- */
  .feature-grid{display:grid;gap:20px;}
  .feature-card{
    background:#fff;border-radius:24px;overflow:hidden;
    box-shadow:var(--shadow);border:1px solid rgba(168,213,186,.5);
    transition:.3s;
  }
  .feature-card:hover{transform:translateY(-4px);}
  .feature-card img{width:100%;height:170px;object-fit:cover;}
  .feature-card .f-body{padding:16px 18px 20px;}
  .feature-card h3{font-size:16px;color:var(--deep);margin-bottom:6px;font-weight:700;}
  .feature-card p{font-size:13.5px;color:var(--grey);}

  /* ---------- faq ---------- */
  .faq-section{background:linear-gradient(180deg,#EDF6EF,#F5F3E7);}
  .faq-layout{display:grid;gap:26px;}
  .faq-art{
    border-radius:26px;overflow:hidden;box-shadow:var(--shadow);
  }
  .faq-art img{width:100%;height:260px;object-fit:cover;}
  .faq-list{display:grid;gap:12px;}
  .faq-item{
    background:#fff;border-radius:18px;box-shadow:0 6px 18px rgba(27,58,45,.07);
    overflow:hidden;
  }
  .faq-q{
    width:100%;text-align:left;background:none;border:none;cursor:pointer;
    font-family:inherit;font-size:15px;font-weight:600;color:var(--ink);
    padding:16px 20px;display:flex;justify-content:space-between;align-items:center;gap:14px;
  }
  .faq-q .mark{
    width:22px;height:22px;flex:none;border-radius:50%;background:var(--sprout);
    color:var(--deep);font-size:15px;line-height:22px;text-align:center;transition:.3s;
  }
  .faq-item.open .faq-q .mark{transform:rotate(45deg);background:var(--deep);color:#fff;}
  .faq-a{
    max-height:0;overflow:hidden;transition:max-height .35s ease;
    font-size:13.5px;color:var(--grey);padding:0 20px;
  }
  .faq-item.open .faq-a{max-height:220px;padding-bottom:18px;}

  /* ---------- footer ---------- */
  .site-footer{
    background:#16352a;color:rgba(255,255,255,.6);
    padding:36px 0 30px;font-size:12.5px;
  }
  .footer-top{display:flex;flex-direction:column;gap:14px;margin-bottom:22px;}
  .footer-brand{display:flex;align-items:center;gap:8px;color:#fff;font-weight:700;font-size:15px;}
  .footer-brand img{height:24px;}
  .footer-nav{display:flex;flex-wrap:wrap;gap:16px;font-size:12.5px;}
  .footer-nav a:hover{color:#fff;}
  .footer-bottom{
    border-top:1px solid rgba(255,255,255,.1);padding-top:16px;
    display:flex;flex-wrap:wrap;gap:8px 18px;align-items:center;
    font-size:12px;color:rgba(255,255,255,.45);
  }
  .footer-bottom a{color:rgba(255,255,255,.55);}
  .footer-bottom a:hover{color:#fff;}

  /* ---------- responsive ---------- */
  @media (min-width:768px){
    .hero{padding:70px 0 90px;}
    .hero h1{font-size:38px;}
    .hero-banner img{height:300px;}
    .cat-grid{grid-template-columns:repeat(3,1fr);}
    .picks{grid-template-columns:repeat(2,1fr);}
    .comm-grid{grid-template-columns:repeat(2,1fr);}
    .feature-grid{grid-template-columns:repeat(2,1fr);}
    .rail{grid-auto-columns:170px;}
    .book-card img{height:226px;}
    .nav-links{display:none;}
    .search-box input{width:170px;}
    .footer-top{flex-direction:row;justify-content:space-between;align-items:center;}
  }
  @media (min-width:1024px){
    .nav-links{display:flex;}
    .hero-inner{grid-template-columns:1.05fr 1fr;align-items:center;gap:44px;}
    .hero h1{font-size:42px;}
    .hero-banner img{height:350px;}
    .cat-layout{grid-template-columns:1fr 1.35fr;align-items:stretch;}
    .cat-grid{grid-template-columns:repeat(3,1fr);}
    .rank-layout{grid-template-columns:1fr 1.1fr;}
    .app-inner{grid-template-columns:1fr 1.05fr;align-items:center;gap:52px;}
    .phone img{height:400px;}
    .faq-layout{grid-template-columns:.8fr 1.2fr;align-items:start;}
    .faq-art img{height:100%;min-height:420px;}
    .rail{grid-auto-columns:186px;}
    .book-card img{height:246px;}
    .sec-head h2{font-size:28px;}
    .app-copy h2{font-size:30px;}
  }