:root{
    --main: #22d3ee;
    --accent: #fb923c;
    --bg: #0f172a;
    --text: #e2e8f0;
    --radius-lg: 24px;
    --radius-md: 18px;
    --shadow: 0 20px 35px -8px rgba(0,0,0,0.4), 0 8px 20px -6px rgba(34,211,238,0.1);
  }
  *{box-sizing:border-box;margin:0;padding:0;}
  body{
    background: var(--bg);
    color: var(--text);
    font-family: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    line-height: 1.6;
    overflow-x: hidden;
  }
  a{text-decoration:none; color:inherit;}
  /* 几何色块背景装饰 */
  .bg-deco{
    position: fixed;
    top: 0; left: 0; width: 100%; height: 100%;
    pointer-events: none;
    z-index: 0;
    overflow: hidden;
  }
  .bg-deco span{
    position: absolute;
    display: block;
    opacity: 0.15;
    border-radius: 30px;
  }
  .bg-deco .c1{width: 240px; height: 240px; background: var(--main); top: 10%; left: -50px; transform: rotate(25deg);}
  .bg-deco .c2{width: 130px; height: 130px; background: var(--accent); bottom: 15%; right: 6%; border-radius: 50%;}
  .bg-deco .c3{width: 100px; height: 100px; background: var(--main); top: 45%; left: 80%; border-radius: 20px; transform: rotate(45deg);}
  .bg-deco .c4{width: 180px; height: 180px; background: var(--accent); top: 70%; left: 10%; border-radius: 40% 60% 30% 70%;}
  .bg-deco .c5{width: 90px; height: 90px; background: var(--main); top: 12%; right: 15%; border-radius: 50%;}
  /* 导航栏 */
  .navbar{
    background: rgba(15,23,42,0.8);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(34,211,238,0.2);
    padding: 0.8rem 1rem;
    position: relative;
    z-index: 20;
  }
  .navbar-brand{
    font-weight: 800;
    font-size: 1.8rem;
    color: var(--text);
    display: flex;
    align-items: center;
    gap: 10px;
  }
  .navbar-brand i{color: var(--accent); font-size: 2rem;}
  .navbar-toggler{background: var(--main); border: none; padding: 4px 8px; border-radius: 12px;}
  .nav-link{
    color: var(--text);
    font-weight: 500;
    margin: 0 10px;
    border-radius: 50px;
    transition: 0.2s;
  }
  .nav-link:hover{color: var(--main); background: rgba(34,211,238,0.08);}
  .navbar .btn{
    border-radius: 50px;
    padding: 8px 20px;
    background: var(--accent);
    border: none;
    color: #0f172a;
    font-weight: 600;
    transition: 0.2s;
  }
  .navbar .btn:hover{background: var(--main);}
  /* 通用容器 */
  .container-custom{
    position: relative;
    z-index: 10;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
  }
  /* hero 区：滚动标签云 */
  .hero-section{
    padding: 80px 0 40px;
    text-align: center;
  }
  .tagcloud{
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 20px 30px;
    margin: 40px 0 25px;
    animation: floatCloud 9s infinite alternate ease-in-out;
  }
  .tagcloud span{
    background: rgba(34,211,238,0.1);
    border: 1px solid rgba(34,211,238,0.3);
    color: var(--main);
    padding: 8px 22px;
    border-radius: 60px;
    font-weight: 500;
    font-size: 1.15rem;
    letter-spacing: 0.5px;
    backdrop-filter: blur(5px);
  }
  .tagcloud span:nth-child(2){color: var(--accent); border-color: rgba(251,146,60,0.4); background: rgba(251,146,60,0.1);}
  .tagcloud span:nth-child(4){color: var(--accent); border-color: rgba(251,146,60,0.4); background: rgba(251,146,60,0.1);}
  @keyframes floatCloud{
    0% {transform: translateY(0px);}
    100% {transform: translateY(-12px);}
  }
  .hero-title{
    font-size: clamp(3rem, 8vw, 4.8rem);
    font-weight: 800;
    color: var(--text);
    line-height: 1.1;
    letter-spacing: -1px;
  }
  .hero-title .accent{color: var(--accent);}
  .hero-sub{
    font-size: 1.3rem;
    color: #b6c2d4;
    max-width: 640px;
    margin: 25px auto 35px;
    font-weight: 400;
  }
  .btn-hero{
    background: var(--main);
    color: #0f172a;
    font-weight: 700;
    border: none;
    border-radius: 60px;
    padding: 14px 40px;
    font-size: 1.2rem;
    box-shadow: 0 8px 30px rgba(34,211,238,0.3);
    transition: 0.3s;
  }
  .btn-hero:hover{background: var(--accent); transform: scale(1.02); color:#0f172a;}
  /* 步骤条：横向时间线 */
  .steps-section{
    padding: 70px 0;
  }
  .section-label{
    color: var(--accent);
    letter-spacing: 3px;
    font-weight: 600;
    text-transform: uppercase;
    font-size: 0.9rem;
  }
  .section-title{
    font-size: 2.8rem;
    font-weight: 800;
    margin-bottom: 40px;
  }
  .timeline{
    display: flex;
    justify-content: space-between;
    gap: 15px;
    flex-wrap: wrap;
    position: relative;
  }
  .timeline::before{
    content: '';
    position: absolute;
    top: 25px;
    left: 0;
    width: 100%;
    height: 3px;
    background: linear-gradient(90deg, var(--main), var(--accent));
    opacity: 0.5;
    border-radius: 10px;
  }
  .timeline-item{
    background: rgba(30,41,59,0.7);
    backdrop-filter: blur(8px);
    border-radius: var(--radius-lg);
    padding: 40px 20px 20px;
    flex: 1 1 180px;
    text-align: center;
    border: 1px solid rgba(34,211,238,0.1);
    transition: 0.3s;
    position: relative;
    z-index: 2;
  }
  .timeline-item:hover{transform: translateY(-8px); border-color: var(--main);}
  .step-icon{
    background: var(--bg);
    width: 55px;
    height: 55px;
    margin: -45px auto 15px;
    border-radius: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.8rem;
    border: 2px solid var(--main);
    color: var(--accent);
    background: #0f172a;
  }
  .timeline-item h5{font-weight: 700; color: var(--text); margin-bottom: 10px;}
  .timeline-item p{color: #aab7cc; font-size: 0.95rem;}
  /* 特色网格卡片 */
  .grid-section{
    padding: 60px 0 80px;
  }
  .feature-card{
    background: rgba(30,41,59,0.55);
    backdrop-filter: blur(6px);
    border-radius: var(--radius-lg);
    padding: 30px 25px;
    height: 100%;
    border: 1px solid rgba(34,211,238,0.15);
    transition: 0.3s;
    box-shadow: 0 12px 25px -8px rgba(0,0,0,0.5);
  }
  .feature-card:hover{
    transform: scale(1.02);
    border-color: var(--accent);
    box-shadow: 0 20px 35px -10px rgba(251,146,60,0.15);
  }
  .feature-card i{
    font-size: 2.5rem;
    color: var(--main);
    margin-bottom: 20px;
    display: inline-block;
  }
  .feature-card h4{font-weight: 700; margin-bottom: 12px;}
  .feature-card p{color: #cbd5e1; font-size: 0.98rem;}
  /* 长文区块 */
  .longform-section{
    padding: 70px 0;
    background: rgba(15,23,42,0.6);
    border-top: 1px solid rgba(34,211,238,0.15);
    border-bottom: 1px solid rgba(34,211,238,0.15);
  }
  .longform-content{
    max-width: 850px;
    margin: 0 auto;
    font-size: 1.1rem;
  }
  .longform-content p{ margin-bottom: 24px; color: #d0dbe9;}
  /* FAQ */
  .faq-section{
    padding: 70px 0;
  }
  .accordion-item{
    background: rgba(30,41,59,0.5);
    border: 1px solid rgba(34,211,238,0.15);
    border-radius: var(--radius-md) !important;
    margin-bottom: 15px;
    overflow: hidden;
  }
  .accordion-button{
    background: transparent;
    color: var(--text);
    font-weight: 600;
    font-size: 1.1rem;
    padding: 22px;
  }
  .accordion-button:not(.collapsed){
    background: rgba(34,211,238,0.08);
    color: var(--main);
  }
  .accordion-button:focus{box-shadow: none;}
  .accordion-body{color: #cbd5e1;}
  /* CTA */
  .cta-section{
    padding: 80px 0;
    text-align: center;
  }
  .cta-card{
    background: linear-gradient(145deg, rgba(34,211,238,0.1), rgba(251,146,60,0.1));
    border-radius: 40px;
    padding: 50px 20px;
    border: 1px solid rgba(34,211,238,0.25);
  }
  /* 友情链接与页脚 */
  .friend-links{
    border-top: 1px solid rgba(34,211,238,0.2);
    padding: 40px 0 20px;
    text-align: center;
    margin-top: 30px;
  }
  .friend-links h6{color: var(--accent); font-weight: 600;}
  .footer{
    padding: 30px 0;
    border-top: 1px solid rgba(34,211,238,0.15);
    color: #8f9eb3;
  }
  /* 回到顶部 */
  #backTop{
    position: fixed;
    bottom: 40px;
    right: 30px;
    width: 48px;
    height: 48px;
    border-radius: 50px;
    background: var(--main);
    color: #0f172a;
    border: none;
    font-size: 1.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: 0.3s;
    z-index: 30;
    box-shadow: 0 4px 20px rgba(34,211,238,0.3);
  }
  #backTop.show{
    opacity: 1;
    visibility: visible;
  }
  img[lazy]{
    background: linear-gradient(135deg, rgba(34,211,238,0.05) 0%, rgba(251,146,60,0.05) 100%);
    opacity: 0.4;
    transition: opacity 0.4s;
  }
  .img-loaded{opacity: 1 !important;}
  @media(max-width: 768px){
    .hero-title{font-size: 2.8rem;}
    .timeline{flex-direction: column; gap: 30px;}
    .timeline::before{display: none;}
  }

/* --- 子页面追加 --- */
.about-hero { background: var(--bg); padding: 100px 0 60px; position: relative; overflow: hidden; }
.about-hero .bg-deco { opacity: 0.5; }
.about-hero .hero-title { font-size: 2.8rem; font-weight: 900; margin-bottom: 20px; }
.about-hero .hero-sub { color: var(--text); opacity: 0.85; max-width: 700px; margin: 0 auto; }
.about-section { padding: 70px 0; border-bottom: 1px solid rgba(255,255,255,0.06); }
.about-section .section-label { display: inline-block; color: var(--main); font-size: 0.9rem; font-weight: 600; letter-spacing: 2px; text-transform: uppercase; margin-bottom: 15px; }
.about-section .section-title { font-size: 2.2rem; font-weight: 800; margin-bottom: 30px; }
.about-section .section-title span { color: var(--accent); }
.about-section p { color: var(--text); line-height: 1.8; opacity: 0.9; }
.about-section .lead { font-size: 1.15rem; opacity: 1; }
.about-feature { padding: 20px; border-radius: var(--radius-md); background: rgba(255,255,255,0.03); border: 1px solid rgba(255,255,255,0.06); height: 100%; transition: transform 0.3s ease, box-shadow 0.3s ease; }
.about-feature:hover { transform: translateY(-5px); box-shadow: var(--shadow); }
.about-feature i { font-size: 2rem; color: var(--main); margin-bottom: 15px; }
.about-feature h3 { font-size: 1.25rem; font-weight: 700; margin-bottom: 10px; color: var(--text); }
.about-feature p { font-size: 0.95rem; opacity: 0.8; }
.timeline-about { border-left: 3px solid var(--main); padding-left: 30px; margin-left: 15px; }
.timeline-about .timeline-item { position: relative; margin-bottom: 40px; }
.timeline-about .timeline-item::before { content: ""; position: absolute; left: -36px; top: 5px; width: 12px; height: 12px; border-radius: 50%; background: var(--accent); border: 3px solid var(--bg); }
.timeline-about .timeline-item h4 { font-size: 1.2rem; font-weight: 700; color: var(--text); margin-bottom: 8px; }
.timeline-about .timeline-item p { font-size: 0.95rem; }
.about-stat { text-align: center; padding: 30px 15px; }
.about-stat .num { font-size: 2.5rem; font-weight: 900; color: var(--main); }
.about-stat .label { color: var(--text); opacity: 0.7; font-size: 0.95rem; }
.about-banner { background: linear-gradient(135deg, rgba(34,211,238,0.15) 0%, rgba(251,146,60,0.15) 100%); border-radius: var(--radius-lg); padding: 50px 30px; text-align: center; margin: 40px 0; }
.about-banner h3 { font-size: 1.8rem; font-weight: 800; margin-bottom: 15px; }
.about-banner p { max-width: 600px; margin: 0 auto 25px; opacity: 0.9; }
.about-hero { padding: 80px 0 40px; }
.about-hero .hero-title { font-size: 2rem; }
.about-section .section-title { font-size: 1.6rem; }
.timeline-about { margin-left: 5px; }

/* --- 子页面追加 --- */
/* 本页专属微调 */
        .privacy-hero {
            padding: 120px 0 60px;
            position: relative;
        }
.privacy-content {
            max-width: 860px;
            margin: 0 auto;
        }
.privacy-content h2 {
            color: var(--main);
            font-weight: 700;
            font-size: 1.6rem;
            margin-top: 2.5rem;
            margin-bottom: 1rem;
            display: flex;
            align-items: center;
            gap: 10px;
        }
.privacy-content h2 i {
            font-size: 1.3rem;
            color: var(--accent);
        }
.privacy-content p, .privacy-content li {
            color: var(--text);
            line-height: 1.8;
            font-size: 1rem;
        }
.privacy-content ul {
            padding-left: 1.5rem;
            margin-bottom: 1rem;
        }
.privacy-content ul li {
            margin-bottom: 0.5rem;
        }
.privacy-card {
            background: rgba(255,255,255,0.04);
            border: 1px solid rgba(34,211,238,0.15);
            border-radius: var(--radius-md);
            padding: 1.8rem;
            margin: 1.5rem 0;
        }
.privacy-card h3 {
            color: var(--accent);
            font-size: 1.15rem;
            font-weight: 600;
            margin-bottom: 0.8rem;
        }
.privacy-card p {
            margin-bottom: 0.5rem;
        }
.privacy-highlight {
            background: rgba(251,146,60,0.08);
            border-left: 4px solid var(--accent);
            padding: 1.2rem 1.5rem;
            border-radius: 0 var(--radius-md) var(--radius-md) 0;
            margin: 1.5rem 0;
        }
.privacy-highlight p {
            margin-bottom: 0;
        }
.last-updated {
            display: inline-block;
            background: rgba(34,211,238,0.1);
            color: var(--main);
            padding: 0.4rem 1.2rem;
            border-radius: 50px;
            font-size: 0.9rem;
            font-weight: 500;
            margin-bottom: 2rem;
        }
.nav-link.active {
            color: var(--main) !important;
            font-weight: 600;
        }

/* --- 子页面追加 --- */
/* 确保所有bootstrap组件/工具类继承本站配色 */
    .card, .card-body, .card-header, .card-footer,
    .form-control, .form-select, .accordion-item, .accordion-button, .accordion-body,
    .list-group-item, .modal-content, .dropdown-menu, .dropdown-item,
    .table, .nav-link, .navbar, .navbar-brand {
      background: transparent !important;
      color: var(--text) !important;
      border-color: rgba(255,255,255,0.12) !important;
    }
/* 背景和文字完全对齐首页 */
    body {
      background-color: var(--bg);
      color: var(--text);
      font-family: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
      line-height: 1.7;
    }
/* 条款专属样式 */
    .legal-hero {
      padding: 3.5rem 0 2.5rem;
      border-bottom: 1px solid rgba(34,211,238,0.15);
    }
.legal-title {
      font-weight: 800;
      font-size: 2.4rem;
      letter-spacing: -0.02em;
      background: linear-gradient(120deg, var(--main) 20%, var(--accent) 90%);
      -webkit-background-clip: text;
      background-clip: text;
      color: transparent;
      display: inline-block;
    }
.legal-sub {
      color: #94a3b8;
      font-size: 1.1rem;
      max-width: 720px;
      margin-top: 0.8rem;
    }
.terms-section {
      padding: 2.8rem 0 1.2rem;
    }
.section-title-icon {
      color: var(--main);
      margin-right: 12px;
    }
.terms-block {
      background: rgba(15, 23, 42, 0.7);
      border-radius: var(--radius-md);
      padding: 2rem 2rem 1.8rem;
      box-shadow: var(--shadow);
      backdrop-filter: blur(4px);
      border: 1px solid rgba(34,211,238,0.15);
    }
.terms-list {
      list-style: none;
      padding-left: 0;
      margin-bottom: 1.5rem;
    }
.terms-list li {
      padding: 0.5rem 0 0.5rem 2.2rem;
      position: relative;
      color: #cbd5e1;
    }
.terms-list li::before {
      content: "\f00c";
      font-family: "Font Awesome 6 Free";
      font-weight: 900;
      color: var(--main);
      position: absolute;
      left: 0;
      top: 0.6rem;
      font-size: 0.95rem;
    }
.terms-list-disc {
      list-style: none;
      padding-left: 0;
    }
.terms-list-disc li {
      padding: 0.4rem 0 0.4rem 1.8rem;
      position: relative;
      color: #cbd5e1;
    }
.terms-list-disc li::before {
      content: "\f0da";
      font-family: "Font Awesome 6 Free";
      font-weight: 900;
      color: var(--accent);
      position: absolute;
      left: 0;
      top: 0.45rem;
      font-size: 0.9rem;
    }
.highlight-badge {
      background: rgba(251,146,60,0.12);
      color: var(--accent);
      border-radius: 40px;
      padding: 0.2rem 1rem;
      font-weight: 500;
      font-size: 0.85rem;
      display: inline-block;
      margin-bottom: 0.5rem;
    }
.hr-light {
      border-top: 1px solid rgba(255,255,255,0.1);
      opacity: 0.5;
      margin: 2.5rem 0;
    }
/* 确保所有卡片无白底 */
    .card, .card-body {
      background: transparent;
    }
/* 覆盖 accordion 默认箭头颜色 */
    .accordion-button::after {
      filter: invert(1) sepia(1) saturate(5) hue-rotate(160deg);
    }
/* 导航栏固定透明背景，与首页一致 */
    .navbar {
      background: rgba(15, 23, 42, 0.75) !important;
      backdrop-filter: blur(10px);
      border-bottom: 1px solid rgba(34,211,238,0.1);
    }
.navbar-brand, .nav-link {
      color: var(--text) !important;
    }
/* 页脚样式与首页近似 */
    .footer-links a {
      color: #94a3b8;
      text-decoration: none;
      margin: 0 1rem;
      font-size: 0.9rem;
    }
.footer-links a:hover {
      color: var(--main);
    }

/* --- Bootstrap 组件配色适配(程序自动补,避免白底黑字) --- */
.accordion-header { background:transparent !important; }