:root{
      /* 升级配色：更鲜明、高级 */
      --bg: #fbfcfe;
      --card: #ffffff;
      --bg_bai_: #ffffff;
      --text: #0f172a; /* 深灰蓝，比纯黑更优雅 */
      --muted: #64748b;
      --line: rgba(100,116,139,.12);
      --brand: #ff6b53;        /* 更饱和的珊瑚橙 */
      --brand2: #ff4d38;
      --gold: #ff9e2c;         /* 更明亮的金 */
      --shadow-light: 0 4px 16px rgba(100,116,139,.08);
      --shadow: 0 10px 30px -8px rgba(100,116,139,.15);
      --shadow-hover: 0 14px 40px -6px rgba(100,116,139,.22);
      --radius: 20px;
      --accent-bg: linear-gradient(135deg, #fff7f5 0%, #fffaf5 100%);
    }

    *{box-sizing:border-box}
    body{
      margin:0;
      font-family: 
        'Inter', 'SF Pro Display', -apple-system, BlinkMacSystemFont,
        "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei",
        "Helvetica Neue", Helvetica, Arial, sans-serif;
      background:
        radial-gradient(1600px 900px at 15% -10%, rgba(255,107,83,.07), transparent 65%),
        radial-gradient(1200px 700px at 88% 15%, rgba(255,158,44,.05), transparent 60%),
        linear-gradient(180deg, #ffffff 0%, var(--bg) 35%, #f8fafc 100%);
      color:var(--text);
      min-height: 100vh;
      line-height: 1.5;
    }

    a{color:inherit; text-decoration:none}
    .container{width:min(1200px, calc(100% - 48px)); margin:0 auto}

    /* Header */
    header{
      position:sticky; top:0; z-index:50;
      background: rgba(255,255,255,.94);
      border-bottom:1px solid var(--line);
      backdrop-filter: blur(16px);
      -webkit-backdrop-filter: blur(16px);
      box-shadow: 0 2px 16px rgba(100,116,139,.08);
    }
    .nav{
      display:flex; align-items:center; justify-content:space-between;
      padding:16px 0;
    }
    .brand{
      display:flex; align-items:center; gap:12px;
      font-weight:800; letter-spacing:.5px;
      font-size:18px;
      color: var(--text);
    }
    .brand-badge{
      width:36px; height:36px; border-radius:12px;
      background: linear-gradient(135deg, var(--brand), var(--brand2));
      box-shadow: 0 6px 18px rgba(255,107,83,.3);
      flex-shrink:0;
    }
    nav ul{list-style:none; margin:0; padding:0; display:flex; gap:24px}
    nav a{
      color:var(--muted);
      padding:10px 16px;
      border-radius:14px;
      transition:.25s ease;
      font-weight:600;
      font-size:16px;
    }
    nav a:hover{
      color:var(--brand);
      background: rgba(255,107,83,.06);
    }

    /* Hero */
    .hero{
       
      padding:80px 0 50px;
      position:relative;
      overflow:hidden;
    }
    .hero::before{
      content:"";
      position:absolute; inset:0;  
      background: #ffe2dc;
   
     z-index: 1;
      pointer-events:none;
    }  
    
    .hero::after{
      content:"";
      position:absolute; inset:0;    
        z-index: 2;
  
        background: linear-gradient(
     45deg,
    color-mix(in srgb, var(--bg_bai_), transparent 0%),
    color-mix(in srgb, var(--bg_bai_), transparent 100%)
  );
  
      pointer-events:none;
    }
    .hero-inner{
      position:relative;
      display:grid;
      grid-template-columns: 1.2fr .8fr;
      gap:40px; z-index: 3;
      align-items:center;
    }
    .kicker{
      display:inline-flex; gap:12px; align-items:center;
      padding:8px 16px;
      border:1.5px solid rgba(255,107,83,.25);
      background: rgba(255,107,83,.08);
      border-radius:999px;
      color: var(--brand);
      font-weight:800;
      font-size:13px;
      letter-spacing:.08em;
      text-transform: uppercase;
    }
    h1{
      margin:18px 0 12px;
      font-size: clamp(40px, 4.8vw, 60px);
      line-height:1.05;
      letter-spacing:-.5px;
      font-weight:900;
      color: var(--text);
    }
    .sub{
      color: var(--brand);
      font-size:22px;
      margin:0 0 20px;
      font-weight:800;
    }
    .sub a{
      text-decoration:underline; 
      text-underline-offset:4px;
      text-decoration-thickness: 2px;
    }
    .selling{
      color:var(--muted);
      line-height:1.85;
      margin:0 0 28px;
      font-weight:500;
      font-size:16px;
    }
    .cta{
      display:flex; gap:18px; flex-wrap:wrap;
    }
    .btn{
      display:inline-flex; align-items:center; justify-content:center;
      padding:16px 28px;
      border-radius:16px;
      border:2px solid var(--line);
      background: var(--card);
      color:var(--text);
      font-weight:800;
      transition:.25s cubic-bezier(.25,.46,.45,.94);
      cursor:pointer;
      min-width: 190px;
      box-shadow: var(--shadow-light);
      font-size:16px;
    }
    .btn i{ margin-right: 4px;}
   .hero .btn:not(.primary){ border-color: #ffb347; color: #ff9500;   }
    .btn:hover{
      transform: translateY(-3px); 
      box-shadow: var(--shadow-hover);
    }
    .btn.primary{
      border:none;
      background: linear-gradient(135deg, var(--gold), #ffb347);
      color:#fff;
      box-shadow: 0 10px 28px rgba(255,158,44,.35);
    }
    .btn.primary:hover{
      filter:brightness(1.06); 
      box-shadow: 0 12px 36px rgba(255,158,44,.45);
    }
    .hero-card{
      background: var(--card);
      /* border:1.5px solid var(--line); */
      border-radius: var(--radius);
      padding:28px;
      box-shadow: var(--shadow);
      height: fit-content;
    }
    .hero-card h3{
      margin:0 0 14px; 
      font-size:19px; 
      color:var(--text);
      font-weight:800;
    }
    .hero-card p{
      margin:0; 
      color:var(--muted); 
      line-height:1.8; 
      font-weight:500;
    }
    .tagline{
      margin-top:24px;
      display:flex;
      flex-wrap:wrap;
      gap:12px;
    }
    .pill{
      padding:10px 16px;
      border-radius:999px;
      /* background: var(--bg_bai_); */
      border:2px solid  rgba(100,116,139,.1) ;
      opacity: .8;
      color: var(--brand);
      font-weight:800;
      font-size:14px;
      letter-spacing:.05em;
    }
    .scroll{
      padding:36px 0 0;
      text-align:center;
      color:var(--muted);
      font-weight:700;
      font-size:15px;
      opacity:0.8;
    }

    /* Sections */
    section{padding:72px 0}
    .section-title{  font-size:63px;line-height: 63px;
      margin:0 0 -20px 0;
      color: var(--brand);
      font-weight:200;
      letter-spacing:0;
        
      text-transform: uppercase;
    }
    .section-h{background: color-mix(in srgb, var(--bg), transparent 80%);  z-index: 2; position: relative;backdrop-filter: blur(10px); 
      margin:0 0 32px;
      font-size:36px;
      letter-spacing:-.5px;
      color: var(--text);
      font-weight:900;
    }
     
  section:nth-of-type(even) .section-h{ background: color-mix(in srgb, var(--bg_bai_), transparent 80%); }
 section:nth-of-type(even){ background: var(--bg_bai_);}
    .grid4{
      display:grid;
      grid-template-columns: repeat(4, 1fr);
      gap:24px;
    }
    .card{
      background: var(--card);
      border: 1.5px solid var(--line);
      border-radius: var(--radius);
      padding:24px 24px 24px 34px;
      box-shadow: var(--shadow-light);
      min-height: 170px;
      transition:.25s ease;
    }
    .card:hover{
      transform:translateY(-4px); 
      box-shadow: var(--shadow);
    }
    .card .t{ margin-left: -22px;
      display:flex; align-items:center; gap:12px; 
       
      color:var(--text);
      font-size:15px;
    }
    .dot{
      width:11px; height:11px; border-radius:50%;
      background: linear-gradient(135deg, var(--brand), var(--brand2));
      box-shadow: 0 4px 14px rgba(255,107,83,.35);
    }
    .card .big{        letter-spacing: 1px;
      margin:14px 0 10px; 
      font-size:20px; 
      font-weight:900; 
      color:var(--text);
      line-height:1.2;
    }
    .card .d{
      margin:0; 
      color:var(--muted); 
      line-height:1.75; 
      font-weight:500; 
      font-size:15px;
    }

    .store-grid{
      display:grid;
      grid-template-columns: repeat(3, 1fr);
      gap:24px;
    }
    .store h4{
      margin:0 0 12px -28px; 
      font-size:18px; 
      color:var(--text);
      font-weight:700;
    }
    .kv{
      color:var(--muted); 
      line-height:1.9; 
      font-weight:500; 
      font-size:15px;
    }
    .kv b{
      color:var(--text);
      font-weight:700;
    }

    .discount{
      display:grid;
      grid-template-columns: 1fr 1fr;
      gap:24px;
      align-items:stretch;
    }
    .badge95{ position: relative; overflow: hidden;
      display:inline-flex;
      gap:14px; align-items:baseline;
      padding:16px 22px;
      border-radius:18px;
      background: linear-gradient(135deg, rgba(255,107,83,.15), rgba(255,158,44,.1));
      border:2px solid rgba(255,107,83,.35);
      font-weight:900;
      width: fit-content;
      margin-bottom:18px;
    }
    .badge95::before,.badge95::after{ content: ""; display: block;border:2px solid rgba(255,107,83,.35);  position: absolute; top: 50%;; width: 16px; height: 16px; border-radius: 50%;  transform: translatey(-50%); background: #fff; z-index: 10;}
  .badge95::before, .badge95::after{background: rgba(255,107,83,.35);}
.badge95::before{ right: -10px;}
.badge95::after{ left: -10px;}
    .badge95 span{
      font-size:36px;
      color: var(--brand);
      letter-spacing:.5px;
    }
    .steps{
      margin:16px 0 0; 
      padding-left:24px; 
      color:var(--muted); 
      line-height:2.1; 
      font-weight:500;
      font-size:15px;
    }
    .steps li{
      margin-bottom:8px;
    }

    /* Form */
    .form-wrap{
      background: var(--card);
      border: 1.5px solid var(--line);
      border-radius: var(--radius);
      padding:32px;
      box-shadow: var(--shadow);
    }
    form{display:grid; gap:20px}
    .row{display:grid; grid-template-columns: 1fr 1fr; gap:20px}
    label{
      font-weight:800; 
      color:var(--text); 
      font-size:15px; 
      margin-bottom:8px; 
      display:block;
    }
    input{
      width:100%;
      padding:14px 16px;
      border-radius:14px;
      border:1.5px solid var(--line);
      background: var(--bg);
      color:var(--text);
      outline:none;
      font-weight:500;
      transition:.25s ease;
      font-size:16px;
    }
    input:focus{
      border-color:var(--brand); 
      box-shadow: 0 0 0 4px rgba(255,107,83,.12);
    }
    input::placeholder{
      color:var(--muted); 
      opacity:.7;
    }
    .hint{
      color:var(--muted); 
      font-weight:500; 
      font-size:13px; 
      margin-top:6px;
    }
    .agree{
      display:flex; gap:12px; align-items:flex-start;
      color:var(--muted); 
      font-weight:500;
      line-height:1.7;
      font-size:15px;
    }
    .agree input{
      width:20px; 
      height:20px; 
      margin-top:4px;
      accent-color: var(--brand);
    }
    .submit{
      border:none;
      background: linear-gradient(135deg, var(--brand), var(--brand2));
      color:#fff;
      padding:16px 28px;
      border-radius:16px;
      font-weight:900;
      cursor:pointer;
      box-shadow: 0 10px 28px rgba(255,107,83,.35);
      transition:.25s cubic-bezier(.25,.46,.45,.94);
      font-size:16px;
      letter-spacing:.5px;
    }
    .submit:hover{
      filter:brightness(1.1); 
      transform: translateY(-2px); 
      box-shadow: 0 14px 36px rgba(255,107,83,.45);
    }

    /* 编号条款块 */
    .terms-block{
      margin-top:28px;
      padding:24px;
      border:1.5px solid var(--line);
      background: var(--bg);
      border-radius: 18px;
    }
    .terms-title{
      margin:0;
      font-size:15px;
      font-weight:900;
      color: var(--text);
      letter-spacing:.05em;
    }
    .terms-list{
      margin:16px 0 0;
      padding-left:24px;
      color: var(--muted);
      font-weight:500;
      line-height:1.9;
      font-size:14px;
    }
    .terms-list li{ 
      margin:10px 0; 
    }
    .terms-list a{
      color: var(--gold);
      text-decoration: underline;
      text-underline-offset: 3px;
      font-weight:600;
    }
    .terms-list a:hover{
      color:var(--brand);
    }

    footer{
      padding:40px 0 50px;
      border-top: 1.5px solid var(--line);
      color:var(--muted);
      font-weight:500;
      background: var(--bg);
      font-size:15px;
    }
    footer a{
      text-decoration:underline; 
      text-underline-offset:3px;
    }
    footer a:hover{
      color:var(--text);
    }

    @media (max-width: 980px){
        section{padding: 42px 0;}
      .hero-inner{grid-template-columns: 1fr}
      .grid4{grid-template-columns: repeat(2, 1fr)}
      .store-grid{grid-template-columns: 1fr}
      .discount{grid-template-columns: 1fr}
      .row{grid-template-columns: 1fr}
      .container{width: calc(100% - 32px);}
      h1{font-size: clamp(36px, 6vw, 48px);}
      .section-h{font-size:28px;}
          .section-title{  font-size:43px;line-height: 43px;    margin: 0 0 -15px 0;}

          .nav ul{ position: fixed; top: calc(100vh - 50px); left: 0; right: 0; justify-content: center; background-color: #fff; height: 50px; align-items: center;}
          .hero{ padding-top: 40px;}
    }

    @media (max-width: 560px){
      .grid4{grid-template-columns: 1fr}
      .cta .btn{min-width:auto; width:100%;}
      .kicker, .pill{font-size:12px;}
    }


    /* .main-header .logo{ position: relative; content: ""; display: block; float: left; min-height: 72px; min-width: 170px;transform: scale(.75); margin-top: -20px; margin-bottom: -20px;margin-left: -20px; margin-right: 0; } */