:root{
    --violet:#818cf8;
    --orchid:#c084fc;
    --ink:#1e1b4b;
    --frost:#e0e7ff;
    --line:rgba(224,231,255,.22);
    --line-soft:rgba(224,231,255,.12);
    --panel:rgba(129,140,248,.06);
  }
  *{box-sizing:border-box;}
  html{scroll-behavior:smooth;}
  body{
    margin:0;
    background:var(--ink);
    color:var(--frost);
    font-family:'Inter',-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
    font-weight:400;
    line-height:1.9;
    letter-spacing:.01em;
    -webkit-font-smoothing:antialiased;
  }
  h1,h2,h3,h4,h5{
    font-weight:900;
    letter-spacing:-.02em;
    line-height:1.25;
    margin:0 0 .8em;
  }
  p{margin:0 0 1.15em;color:rgba(224,231,255,.82);}
  a{color:var(--violet);text-decoration:none;transition:color .25s ease,border-color .25s ease;}
  a:hover{color:var(--orchid);}
  .mono{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-variant-numeric:tabular-nums;}

  /* 顶部阅读进度条 */
  #readbar{
    position:fixed;top:0;left:0;height:2px;width:0%;
    background:linear-gradient(90deg,var(--violet),var(--orchid));
    z-index:2000;transition:width .08s linear;
  }

  /* 导航 */
  .nav-shell{
    position:sticky;top:0;z-index:1500;
    background:rgba(30,27,75,.92);
    backdrop-filter:blur(12px);
    border-bottom:1px solid var(--line);
  }
  .brand-link{
    font-weight:900;font-size:1.18rem;color:var(--frost)!important;
    letter-spacing:.02em;display:inline-flex;align-items:center;gap:.5rem;
  }
  .brand-link i{color:var(--orchid);font-size:1rem;}
  .brand-link:hover{color:var(--violet)!important;}
  .nav-link-c{
    color:rgba(224,231,255,.72)!important;
    font-size:.9rem;font-weight:500;padding:.45rem .1rem!important;
    border-bottom:1px solid transparent;
  }
  .nav-link-c:hover,.nav-link-c:focus{color:var(--frost)!important;border-bottom-color:var(--violet);}
  .navbar-toggler{border:1px solid var(--line);padding:.3rem .55rem;}
  .navbar-toggler:focus{box-shadow:none;}
  .navbar-toggler .fa-bars{color:var(--frost);font-size:1rem;}

  /* 通用容器 */
  .wrap{max-width:1140px;margin:0 auto;padding:0 22px;}
  .sec{padding:88px 0;border-bottom:1px solid var(--line-soft);}
  .sec:last-of-type{border-bottom:none;}
  .eyebrow{
    font-size:.76rem;letter-spacing:.22em;text-transform:uppercase;
    color:var(--orchid);font-weight:700;margin-bottom:.9rem;
  }
  .sec-title{font-size:clamp(1.5rem,2.6vw,2.05rem);margin-bottom:.55rem;}
  .sec-sub{font-size:.96rem;color:rgba(224,231,255,.6);max-width:640px;margin-bottom:2.6rem;}

  /* 滚动进入视口 */
  .reveal{opacity:0;transform:translateY(26px);transition:opacity .7s ease,transform .7s ease;}
  .reveal.in{opacity:1;transform:none;}

  /* HERO */
  .hero{
    padding:76px 0 84px;
    border-bottom:1px solid var(--line-soft);
  }
  .hero-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:56px;align-items:center;}
  .hero h1{font-size:clamp(2rem,4.4vw,3.4rem);font-weight:900;margin-bottom:1rem;}
  .hero h1 em{font-style:normal;color:var(--violet);}
  .hero-lead{font-size:1.02rem;line-height:2;max-width:520px;color:rgba(224,231,255,.78);}
  .hero-stats{
    display:flex;gap:36px;margin-top:2.2rem;flex-wrap:wrap;
    border-top:1px solid var(--line-soft);padding-top:1.6rem;
  }
  .hstat{min-width:96px;}
  .hstat b{display:block;font-size:1.45rem;font-weight:800;color:var(--frost);font-family:ui-monospace,Menlo,monospace;}
  .hstat span{font-size:.78rem;letter-spacing:.1em;color:rgba(224,231,255,.5);text-transform:uppercase;}

  /* 关键词标签云 */
  .cloud{
    display:flex;flex-wrap:wrap;gap:.55rem;align-content:flex-start;
    border:1px solid var(--line);padding:26px 24px;border-radius:2px;
  }
  .cloud .tag{
    font-size:.83rem;font-weight:500;padding:.32rem .72rem;
    border:1px solid var(--line-soft);border-radius:2px;
    color:rgba(224,231,255,.72);
    animation:drift 7s ease-in-out infinite;
    will-change:transform;
  }
  .cloud .tag.hot{color:var(--orchid);border-color:rgba(192,132,252,.5);}
  .cloud .tag.mid{color:var(--violet);border-color:rgba(129,140,248,.45);}
  .cloud .tag:nth-child(3n){animation-delay:.8s;}
  .cloud .tag:nth-child(3n+1){animation-delay:1.6s;}
  .cloud .tag:nth-child(4n){animation-delay:2.4s;}
  @keyframes drift{
    0%,100%{transform:translateY(0);}
    50%{transform:translateY(-5px);}
  }

  /* 使用说明手风琴 */
  .acc{border-top:1px solid var(--line);}
  .acc-item{border-bottom:1px solid var(--line);}
  .acc-head{
    width:100%;background:none;border:none;text-align:left;
    display:flex;align-items:center;justify-content:space-between;gap:1rem;
    padding:1.35rem .2rem;color:var(--frost);
    font-weight:800;font-size:1rem;letter-spacing:-.01em;cursor:pointer;
    transition:color .25s ease;
  }
  .acc-head:hover{color:var(--violet);}
  .acc-head i{font-size:.8rem;color:var(--violet);transition:transform .3s ease;flex-shrink:0;}
  .acc-item.open .acc-head i{transform:rotate(45deg);}
  .acc-body{
    max-height:0;overflow:hidden;
    transition:max-height .4s ease,padding .3s ease;
  }
  .acc-item.open .acc-body{max-height:340px;padding-bottom:1.3rem;}
  .acc-body p{margin:0;font-size:.94rem;line-height:1.95;max-width:760px;color:rgba(224,231,255,.72);}
  .acc-no{
    font-family:ui-monospace,Menlo,monospace;font-size:.78rem;
    color:rgba(224,231,255,.38);margin-right:.9rem;
  }

  /* 特色网格 —— 三栏卡片 */
  .card-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:var(--line-soft);border:1px solid var(--line-soft);}
  .f-card{
    background:var(--ink);padding:2rem 1.65rem;
    transition:transform .3s ease,border-color .3s ease,background .3s ease;
    border:1px solid transparent;display:flex;flex-direction:column;
  }
  .f-card:hover{
    transform:scale(1.022);
    border-color:var(--violet);
    background:var(--panel);
    z-index:2;
  }
  .f-card .ico{
    width:38px;height:38px;display:grid;place-items:center;
    border:1px solid var(--line);color:var(--orchid);font-size:.95rem;
    margin-bottom:1.25rem;
  }
  .f-card h3{font-size:1.04rem;font-weight:800;margin-bottom:.6rem;}
  .f-card p{font-size:.9rem;line-height:1.85;margin:0;color:rgba(224,231,255,.68);}
  .f-card .meta{
    margin-top:1.3rem;padding-top:.9rem;border-top:1px solid var(--line-soft);
    font-family:ui-monospace,Menlo,monospace;font-size:.76rem;
    color:rgba(224,231,255,.42);letter-spacing:.04em;
  }

  /* 长文区 */
  .longform{display:grid;grid-template-columns:.85fr 1.15fr;gap:64px;}
  .longform h2{font-size:clamp(1.4rem,2.3vw,1.85rem);}
  .longform .col-r p{font-size:.97rem;line-height:2.05;color:rgba(224,231,255,.76);}
  .longform .col-r p:first-of-type::first-letter{
    font-size:2.6rem;font-weight:900;color:var(--orchid);
    float:left;line-height:1;margin:.12em .18em 0 0;
  }
  .quote-line{
    border-left:2px solid var(--violet);padding:.3rem 0 .3rem 1.2rem;
    margin:1.8rem 0;color:rgba(224,231,255,.9);font-weight:600;font-size:.98rem;
  }

  /* FAQ */
  .faq-list{border-top:1px solid var(--line);}
  .faq-item{border-bottom:1px solid var(--line);}
  .faq-q{
    width:100%;background:none;border:none;text-align:left;cursor:pointer;
    padding:1.3rem .2rem;color:var(--frost);font-weight:700;font-size:.97rem;
    display:flex;justify-content:space-between;align-items:flex-start;gap:1.2rem;
    transition:color .25s ease;
  }
  .faq-q:hover{color:var(--violet);}
  .faq-q span.q{flex:1;}
  .faq-q i{color:var(--orchid);font-size:.78rem;margin-top:.45rem;transition:transform .3s ease;flex-shrink:0;}
  .faq-item.open .faq-q i{transform:rotate(180deg);}
  .faq-a{max-height:0;overflow:hidden;transition:max-height .4s ease;}
  .faq-item.open .faq-a{max-height:320px;}
  .faq-a p{padding:0 .2rem 1.3rem;margin:0;font-size:.93rem;line-height:1.95;color:rgba(224,231,255,.7);max-width:800px;}

  /* CTA */
  .cta-box{
    border:1px solid var(--line);padding:64px 44px;text-align:center;
    background:var(--panel);
  }
  .cta-box h2{font-size:clamp(1.5rem,3vw,2.2rem);margin-bottom:.7rem;}
  .cta-box p{max-width:560px;margin:0 auto 2rem;font-size:.97rem;}
  .btn-ghost{
    display:inline-flex;align-items:center;gap:.6rem;
    border:1px solid var(--violet);color:var(--frost);
    padding:.8rem 1.9rem;font-weight:700;font-size:.93rem;border-radius:2px;
    transition:background .28s ease,color .28s ease,border-color .28s ease,transform .28s ease;
  }
  .btn-ghost:hover{background:var(--violet);color:var(--ink);border-color:var(--violet);transform:translateY(-2px);}
  .btn-ghost.alt{border-color:var(--line);margin-left:.6rem;}
  .btn-ghost.alt:hover{background:var(--orchid);border-color:var(--orchid);color:var(--ink);}

  /* 友情链接 */
  .friend-sec{padding:52px 0;border-top:1px solid var(--line-soft);}
  .friend-sec h4{font-size:.8rem;letter-spacing:.2em;text-transform:uppercase;color:rgba(224,231,255,.5);font-weight:700;margin-bottom:1rem;}
  .friend-line{font-size:.9rem;color:rgba(224,231,255,.66);line-height:2.1;}

  /* 页脚 */
  footer.site-foot{border-top:1px solid var(--line);padding:52px 0 40px;}
  .foot-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:44px;}
  .foot-brand{font-weight:900;font-size:1.1rem;color:var(--frost);margin-bottom:.8rem;display:inline-flex;align-items:center;gap:.5rem;}
  .foot-brand i{color:var(--orchid);font-size:.9rem;}
  .foot-grid p{font-size:.88rem;color:rgba(224,231,255,.55);line-height:1.9;max-width:340px;}
  .foot-col h5{font-size:.78rem;letter-spacing:.16em;text-transform:uppercase;color:rgba(224,231,255,.45);font-weight:700;margin-bottom:1rem;}
  .foot-col ul{list-style:none;padding:0;margin:0;}
  .foot-col li{margin-bottom:.55rem;}
  .foot-col a{font-size:.88rem;color:rgba(224,231,255,.68);}
  .foot-col a:hover{color:var(--orchid);}
  .foot-bottom{
    margin-top:44px;padding-top:22px;border-top:1px solid var(--line-soft);
    display:flex;justify-content:space-between;flex-wrap:wrap;gap:.8rem;
    font-size:.8rem;color:rgba(224,231,255,.4);
  }

  @media (max-width:991px){
    .hero-grid{grid-template-columns:1fr;gap:40px;}
    .card-grid{grid-template-columns:repeat(2,1fr);}
    .longform{grid-template-columns:1fr;gap:32px;}
    .foot-grid{grid-template-columns:1fr 1fr;gap:32px;}
  }
  @media (max-width:767px){
    .sec{padding:62px 0;}
    .hero{padding:52px 0 62px;}
    .card-grid{grid-template-columns:1fr;}
    .cta-box{padding:44px 22px;}
    .btn-ghost.alt{margin-left:0;margin-top:.8rem;}
    .hero-stats{gap:26px;}
    .foot-grid{grid-template-columns:1fr;}
    .navbar-collapse{padding-top:.6rem;}
    .nav-link-c{padding:.55rem .1rem!important;border-bottom:1px solid var(--line-soft);}
  }
  @media (prefers-reduced-motion:reduce){
    *{animation:none!important;transition:none!important;}
    .reveal{opacity:1;transform:none;}
  }

/* --- 子页面追加 --- */
.about-hero { padding: 96px 0 56px; }
.about-hero h1 { font-size: clamp(2rem, 4.2vw, 3.2rem); font-weight: 800; line-height: 1.22; letter-spacing: -.02em; }
.about-hero h1 .hl { color: var(--orchid); }
.about-body { padding: 24px 0 80px; }
.about-panel {
    background: var(--panel);
    border: 1px solid var(--line-soft);
    border-radius: 18px;
    padding: 28px 26px;
    height: 100%;
  }
.about-panel h3 { font-size: 1.12rem; font-weight: 700; margin-bottom: 12px; color: var(--frost); }
.about-panel p { color: rgba(224,231,255,.78); font-size: .95rem; line-height: 1.85; margin: 0; }
.about-panel .ico { color: var(--violet); font-size: 1.35rem; margin-bottom: 14px; display: block; }
.about-list { list-style: none; padding: 0; margin: 0; }
.about-list li {
    position: relative; padding-left: 22px; margin-bottom: 14px;
    color: rgba(224,231,255,.8); font-size: .95rem; line-height: 1.8;
  }
.about-list li::before {
    content: ""; position: absolute; left: 0; top: .62em;
    width: 7px; height: 7px; border-radius: 50%;
    background: linear-gradient(135deg, var(--violet), var(--orchid));
  }
.about-list li strong { color: var(--frost); font-weight: 600; }
.timeline-item {
    border-left: 2px solid var(--line);
    padding: 0 0 26px 22px;
    position: relative;
  }
.timeline-item::before {
    content: ""; position: absolute; left: -6px; top: 4px;
    width: 10px; height: 10px; border-radius: 50%;
    background: var(--orchid); box-shadow: 0 0 0 4px rgba(192,132,252,.16);
  }
.timeline-item h3 { font-size: 1.02rem; font-weight: 700; color: var(--frost); margin-bottom: 6px; }
.timeline-item p { color: rgba(224,231,255,.74); font-size: .92rem; line-height: 1.8; margin: 0; }
.timeline-item .mono { color: var(--violet); font-size: .8rem; letter-spacing: .08em; }
.ab-quote {
    border: 1px solid var(--line);
    border-radius: 16px;
    padding: 26px 28px;
    background: linear-gradient(135deg, rgba(129,140,248,.1), rgba(192,132,252,.06));
    font-size: 1rem; line-height: 1.9; color: rgba(224,231,255,.86);
  }
.ab-quote i { color: var(--orchid); margin-right: 8px; }
.about-hero { padding: 68px 0 36px; }
.about-panel { padding: 22px 20px; }

/* --- 子页面追加 --- */
.page-hero {padding:120px 0 40px;}
.page-hero h1 {font-size:clamp(1.9rem,4vw,3rem);font-weight:800;letter-spacing:-.02em;color:var(--frost);line-height:1.2;}
.page-hero h1 .accent {background:linear-gradient(90deg,var(--violet),var(--orchid));-webkit-background-clip:text;background-clip:text;color:transparent;}
.page-hero p.lead {color:var(--frost);opacity:.75;max-width:720px;font-size:1.02rem;line-height:1.85;}
.legal-block {background:var(--panel);border:1px solid var(--line-soft);border-radius:18px;padding:28px 26px;margin-bottom:22px;}
.legal-block h2 {font-size:1.22rem;font-weight:700;color:var(--frost);margin-bottom:14px;display:flex;align-items:flex-start;gap:10px;line-height:1.5;}
.legal-block h2 i {color:var(--violet);font-size:1rem;margin-top:4px;flex:0 0 auto;}
.legal-block p,.legal-block li {color:var(--frost);opacity:.82;font-size:.95rem;line-height:1.9;}
.legal-block ul {padding-left:1.1rem;margin:10px 0 0;}
.legal-block ul li {margin-bottom:6px;}
.legal-block strong {color:var(--light, #fff);opacity:1;color:var(--frost);font-weight:600;}
.legal-tag {display:inline-flex;align-items:center;gap:8px;font-size:.78rem;letter-spacing:.12em;text-transform:uppercase;color:var(--violet);border:1px solid var(--line);border-radius:999px;padding:6px 14px;margin-bottom:18px;}
.meta-line {display:flex;flex-wrap:wrap;gap:18px;margin-top:20px;font-size:.82rem;color:var(--frost);opacity:.6;}
.meta-line i {margin-right:6px;color:var(--violet);}
.back-home {display:inline-flex;align-items:center;gap:8px;margin-top:8px;color:var(--violet);text-decoration:none;font-weight:600;font-size:.92rem;}
.back-home:hover {color:var(--orchid);}
.page-hero {padding:100px 0 24px;}
.legal-block {padding:22px 18px;}