:root{
    --c-primary:#4f46e5;
    --c-accent:#7c3aed;
    --c-bg:#f5f3ff;
    --c-text:#1e1b4b;
    --c-line:#d8d4f5;
    --c-line-soft:#e8e5fb;
    --c-muted:#6b6894;
    --nav-h:68px;
  }
  *{box-sizing:border-box;}
  html{scroll-behavior:smooth;}
  body{
    margin:0;
    background:var(--c-bg);
    color:var(--c-text);
    font-family:'Inter','PingFang SC','Microsoft YaHei',sans-serif;
    font-weight:400;
    line-height:1.85;
    letter-spacing:.01em;
    -webkit-font-smoothing:antialiased;
    position:relative;
  }
  body::before{
    content:"";
    position:fixed;
    inset:0;
    pointer-events:none;
    z-index:9999;
    opacity:.035;
    background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='140' height='140'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='140' height='140' filter='url(%23n)'/%3E%3C/svg%3E");
  }
  h1,h2,h3,h4{
    font-weight:900;
    letter-spacing:-.02em;
    line-height:1.2;
    color:var(--c-text);
  }
  a{color:var(--c-primary);text-decoration:none;}
  a:hover{color:var(--c-accent);}
  .mono{font-family:'SFMono-Regular',Consolas,'Liberation Mono',monospace;font-weight:600;}

  /* ---------- NAV ---------- */
  .site-nav{
    position:sticky;
    top:0;
    z-index:1000;
    height:var(--nav-h);
    display:flex;
    align-items:center;
    background:rgba(245,243,255,.55);
    backdrop-filter:blur(10px);
    -webkit-backdrop-filter:blur(10px);
    border-bottom:1px solid transparent;
    transition:background .35s ease,border-color .35s ease;
  }
  .site-nav.scrolled{
    background:rgba(245,243,255,.94);
    border-bottom:1px solid var(--c-line);
  }
  .nav-inner{
    width:100%;
    max-width:1180px;
    margin:0 auto;
    padding:0 22px;
    display:flex;
    align-items:center;
    justify-content:space-between;
    gap:18px;
  }
  .brand{
    display:inline-flex;
    align-items:center;
    gap:9px;
    font-weight:900;
    font-size:1.22rem;
    color:var(--c-text);
    letter-spacing:-.02em;
    white-space:nowrap;
  }
  .brand:hover{color:var(--c-primary);}
  .brand .ico{
    width:30px;height:30px;
    border:1.6px solid var(--c-primary);
    border-radius:8px;
    display:inline-flex;align-items:center;justify-content:center;
    font-size:.85rem;
    color:var(--c-primary);
    flex:0 0 auto;
  }
  .nav-links{
    display:flex;
    align-items:center;
    gap:4px;
    list-style:none;
    margin:0;padding:0;
  }
  .nav-links a{
    display:inline-block;
    padding:8px 13px;
    font-size:.915rem;
    font-weight:500;
    color:var(--c-text);
    border-radius:8px;
    border:1px solid transparent;
    transition:border-color .22s,color .22s,background .22s;
  }
  .nav-links a:hover{
    color:var(--c-primary);
    border-color:var(--c-line);
    background:rgba(79,70,229,.05);
  }
  .nav-toggle{
    display:none;
    background:none;
    border:1px solid var(--c-line);
    border-radius:8px;
    width:42px;height:38px;
    color:var(--c-text);
    font-size:1rem;
    cursor:pointer;
  }
  @media(max-width:900px){
    .nav-toggle{display:inline-flex;align-items:center;justify-content:center;}
    .nav-links{
      position:absolute;
      top:var(--nav-h);
      left:0;right:0;
      flex-direction:column;
      align-items:stretch;
      gap:0;
      background:rgba(245,243,255,.99);
      border-bottom:1px solid var(--c-line);
      max-height:0;
      overflow:hidden;
      transition:max-height .32s ease;
    }
    .nav-links.open{max-height:420px;}
    .nav-links a{
      padding:14px 22px;
      border-radius:0;
      border:none;
      border-top:1px solid var(--c-line-soft);
      font-size:1rem;
    }
  }

  /* ---------- HERO : split ---------- */
  .hero{
    display:grid;
    grid-template-columns:1.05fr .95fr;
    align-items:stretch;
    border-bottom:1px solid var(--c-line);
    min-height:calc(100vh - var(--nav-h));
  }
  .hero-left{
    padding:74px 54px 74px 22px;
    max-width:640px;
    margin-left:auto;
    width:100%;
    display:flex;
    flex-direction:column;
    justify-content:center;
  }
  .hero-right{
    background:var(--c-primary);
    color:#fff;
    padding:60px 54px;
    display:flex;
    flex-direction:column;
    justify-content:center;
    position:relative;
    overflow:hidden;
    border-left:1px solid var(--c-line);
  }
  .hero-right::after{
    content:"";
    position:absolute;
    width:420px;height:420px;
    border:1px solid rgba(255,255,255,.16);
    border-radius:50%;
    right:-160px;bottom:-180px;
    pointer-events:none;
  }
  .eyebrow{
    display:inline-flex;
    align-items:center;
    gap:8px;
    font-size:.78rem;
    font-weight:700;
    letter-spacing:.16em;
    text-transform:uppercase;
    color:var(--c-accent);
    border:1px solid var(--c-line);
    border-radius:999px;
    padding:5px 14px;
    margin-bottom:26px;
    width:fit-content;
    background:#fff;
  }
  .hero h1{
    font-size:clamp(2.2rem,4.6vw,3.5rem);
    margin:0 0 22px;
  }
  .hero h1 .hl{
    color:var(--c-primary);
  }
  .hero-lede{
    font-size:1.045rem;
    color:var(--c-muted);
    max-width:34em;
    margin:0 0 34px;
  }
  .hero-actions{display:flex;flex-wrap:wrap;gap:14px;}
  .btn-line{
    position:relative;
    display:inline-flex;
    align-items:center;
    gap:10px;
    padding:13px 28px;
    border-radius:10px;
    font-weight:700;
    font-size:.95rem;
    border:1.6px solid var(--c-primary);
    color:#fff;
    background:linear-gradient(110deg,var(--c-primary) 0%,var(--c-accent) 50%,var(--c-primary) 100%);
    background-size:220% 100%;
    background-position:0% 50%;
    overflow:hidden;
    transition:background-position .6s ease,transform .2s ease;
  }
  .btn-line:hover{
    background-position:100% 50%;
    color:#fff;
    transform:translateY(-1px);
  }
  .btn-line::after{
    content:"";
    position:absolute;
    top:0;left:-60%;
    width:45%;height:100%;
    background:linear-gradient(100deg,transparent,rgba(255,255,255,.42),transparent);
    transform:skewX(-18deg);
    transition:left .55s ease;
  }
  .btn-line:hover::after{left:120%;}
  .btn-ghost{
    display:inline-flex;
    align-items:center;
    gap:10px;
    padding:13px 28px;
    border-radius:10px;
    font-weight:700;
    font-size:.95rem;
    border:1.6px solid var(--c-line);
    color:var(--c-text);
    background:transparent;
    transition:border-color .25s,color .25s;
  }
  .btn-ghost:hover{
    border-color:var(--c-accent);
    color:var(--c-accent);
  }
  .hero-num-label{
    font-size:.78rem;
    letter-spacing:.18em;
    text-transform:uppercase;
    font-weight:700;
    color:rgba(255,255,255,.72);
    margin-bottom:12px;
  }
  .big-stat{
    font-family:'SFMono-Regular',Consolas,monospace;
    font-weight:800;
    font-size:clamp(3.4rem,7vw,5.6rem);
    line-height:.95;
    letter-spacing:-.04em;
    color:#fff;
    margin:0 0 8px;
  }
  .big-stat small{
    font-size:.34em;
    font-weight:600;
    letter-spacing:0;
    margin-left:6px;
    color:rgba(255,255,255,.8);
  }
  .stat-grid{
    display:grid;
    grid-template-columns:1fr 1fr;
    gap:0;
    margin-top:40px;
    border-top:1px solid rgba(255,255,255,.24);
  }
  .stat-cell{
    padding:20px 0 4px;
    border-bottom:1px solid rgba(255,255,255,.16);
  }
  .stat-cell:nth-child(odd){padding-right:18px;border-right:1px solid rgba(255,255,255,.16);}
  .stat-cell:nth-child(even){padding-left:18px;}
  .stat-cell .v{
    font-family:'SFMono-Regular',Consolas,monospace;
    font-size:1.6rem;
    font-weight:800;
    letter-spacing:-.02em;
    color:#fff;
  }
  .stat-cell .k{
    font-size:.82rem;
    color:rgba(255,255,255,.72);
    margin-top:2px;
  }
  @media(max-width:900px){
    .hero{grid-template-columns:1fr;min-height:auto;}
    .hero-left{padding:56px 22px;max-width:none;}
    .hero-right{padding:46px 22px;border-left:none;border-top:1px solid var(--c-line);}
  }

  /* ---------- SECTION SHELL ---------- */
  .wrap{max-width:1180px;margin:0 auto;padding:0 22px;}
  section{padding:86px 0;border-bottom:1px solid var(--c-line);}
  section:last-of-type{border-bottom:none;}
  .sec-head{margin-bottom:44px;max-width:660px;}
  .sec-kicker{
    display:inline-block;
    font-size:.76rem;
    font-weight:800;
    letter-spacing:.2em;
    text-transform:uppercase;
    color:var(--c-accent);
    margin-bottom:14px;
  }
  .sec-head h2{
    font-size:clamp(1.6rem,3vw,2.15rem);
    margin:0 0 16px;
  }
  .sec-head p{
    color:var(--c-muted);
    margin:0;
    font-size:1rem;
  }

  /* ---------- FEATURE TABLE ---------- */
  .feat-table{
    width:100%;
    border-collapse:collapse;
    border:1px solid var(--c-line);
    border-radius:12px;
    overflow:hidden;
    background:#fff;
    font-size:.955rem;
  }
  .feat-table thead th{
    background:#faf9ff;
    font-weight:800;
    font-size:.82rem;
    letter-spacing:.1em;
    text-transform:uppercase;
    color:var(--c-muted);
    padding:16px 20px;
    border-bottom:1px solid var(--c-line);
    text-align:left;
    white-space:nowrap;
  }
  .feat-table tbody td{
    padding:20px;
    border-bottom:1px solid var(--c-line-soft);
    vertical-align:top;
    color:var(--c-text);
  }
  .feat-table tbody tr:last-child td{border-bottom:none;}
  .feat-table tbody tr:hover td{background:#fbfaff;}
  .feat-table .feat-name{
    font-weight:800;
    display:flex;
    align-items:center;
    gap:10px;
    white-space:nowrap;
  }
  .feat-table .feat-name i{color:var(--c-primary);font-size:.95rem;}
  .feat-table .dim{color:var(--c-muted);}
  .tag{
    display:inline-block;
    font-size:.74rem;
    font-weight:700;
    letter-spacing:.04em;
    padding:3px 10px;
    border:1px solid var(--c-line);
    border-radius:999px;
    color:var(--c-primary);
    background:#f7f5ff;
    white-space:nowrap;
  }
  @media(max-width:820px){
    .feat-table, .feat-table thead, .feat-table tbody, .feat-table tr, .feat-table td, .feat-table th{display:block;}
    .feat-table thead{display:none;}
    .feat-table tbody tr{
      border-bottom:1px solid var(--c-line);
      padding:16px 18px;
    }
    .feat-table tbody tr:last-child{border-bottom:none;}
    .feat-table tbody td{
      border:none;
      padding:6px 0;
    }
    .feat-table tbody td::before{
      content:attr(data-label);
      display:block;
      font-size:.72rem;
      font-weight:800;
      letter-spacing:.12em;
      text-transform:uppercase;
      color:var(--c-muted);
      margin-bottom:2px;
    }
  }

  /* ---------- FAQ ---------- */
  .faq-list{display:flex;flex-direction:column;gap:0;border-top:1px solid var(--c-line);}
  .faq-item{border-bottom:1px solid var(--c-line);}
  .faq-q{
    width:100%;
    background:none;
    border:none;
    text-align:left;
    padding:24px 4px;
    display:flex;
    align-items:flex-start;
    justify-content:space-between;
    gap:20px;
    cursor:pointer;
    font-family:inherit;
    font-size:1.02rem;
    font-weight:700;
    color:var(--c-text);
    line-height:1.6;
    transition:color .22s;
  }
  .faq-q:hover{color:var(--c-primary);}
  .faq-q .sign{
    flex:0 0 auto;
    width:26px;height:26px;
    border:1.4px solid var(--c-line);
    border-radius:50%;
    display:inline-flex;align-items:center;justify-content:center;
    font-size:.72rem;
    color:var(--c-primary);
    transition:transform .3s ease,border-color .3s ease,background .3s ease;
    margin-top:2px;
  }
  .faq-item.open .faq-q .sign{
    transform:rotate(45deg);
    border-color:var(--c-primary);
    background:rgba(79,70,229,.08);
  }
  .faq-a{
    max-height:0;
    overflow:hidden;
    transition:max-height .38s ease;
  }
  .faq-a p{
    margin:0;
    padding:0 4px 26px;
    color:var(--c-muted);
    font-size:.965rem;
    max-width:62em;
  }

  /* ---------- INTRO / NUMBERED LIST ---------- */
  .intro-grid{
    display:grid;
    grid-template-columns:.92fr 1.08fr;
    gap:60px;
    align-items:start;
  }
  .intro-left h2{font-size:clamp(1.6rem,3vw,2.1rem);margin:0 0 18px;}
  .intro-left p{color:var(--c-muted);margin:0 0 16px;}
  .intro-figure{
    border:1px solid var(--c-line);
    border-radius:12px;
    overflow:hidden;
    background:#fff;
    margin-top:28px;
  }
  .intro-figure img{width:100%;height:auto;display:block;aspect-ratio:16/10;object-fit:cover;}
  .intro-figure figcaption{
    font-size:.82rem;
    color:var(--c-muted);
    padding:12px 16px;
    border-top:1px solid var(--c-line-soft);
  }
  .num-list{list-style:none;margin:0;padding:0;counter-reset:step;}
  .num-list li{
    counter-increment:step;
    position:relative;
    padding:0 0 30px 62px;
    border-bottom:1px dashed var(--c-line);
    margin-bottom:30px;
  }
  .num-list li:last-child{border-bottom:none;margin-bottom:0;padding-bottom:0;}
  .num-list li::before{
    content:counter(step,decimal-leading-zero);
    position:absolute;
    left:0;top:0;
    width:42px;height:42px;
    border:1.5px solid var(--c-primary);
    border-radius:10px;
    display:flex;align-items:center;justify-content:center;
    font-family:'SFMono-Regular',Consolas,monospace;
    font-weight:800;
    font-size:.95rem;
    color:var(--c-primary);
    background:#fff;
  }
  .num-list h3{
    font-size:1.06rem;
    font-weight:800;
    margin:6px 0 8px;
  }
  .num-list p{
    margin:0;
    color:var(--c-muted);
    font-size:.955rem;
  }
  @media(max-width:900px){
    .intro-grid{grid-template-columns:1fr;gap:44px;}
  }

  /* ---------- CTA ---------- */
  .cta-band{
    padding:0;
    border-bottom:1px solid var(--c-line);
  }
  .cta-inner{
    max-width:1180px;
    margin:0 auto;
    padding:72px 22px;
    display:grid;
    grid-template-columns:1.1fr .9fr;
    gap:44px;
    align-items:center;
  }
  .cta-inner h2{
    font-size:clamp(1.7rem,3.2vw,2.4rem);
    margin:0 0 16px;
  }
  .cta-inner p{
    color:var(--c-muted);
    margin:0;
    max-width:36em;
  }
  .cta-box{
    border:1.5px solid var(--c-primary);
    border-radius:14px;
    padding:30px;
    background:#fff;
  }
  .cta-box .row-line{
    display:flex;
    justify-content:space-between;
    align-items:baseline;
    padding:11px 0;
    border-bottom:1px dashed var(--c-line);
    font-size:.92rem;
  }
  .cta-box .row-line:last-of-type{border-bottom:none;}
  .cta-box .row-line span:first-child{color:var(--c-muted);}
  .cta-box .row-line span:last-child{font-weight:700;}
  .cta-box .mono{color:var(--c-primary);}
  .cta-box .btn-line{width:100%;justify-content:center;margin-top:20px;}
  @media(max-width:900px){
    .cta-inner{grid-template-columns:1fr;padding:56px 22px;gap:32px;}
  }

  /* ---------- FOOTER ---------- */
  footer{background:var(--c-text);color:#cfcce8;padding:64px 0 0;}
  .foot-inner{
    max-width:1180px;
    margin:0 auto;
    padding:0 22px;
    display:grid;
    grid-template-columns:1.4fr 1fr 1fr;
    gap:44px;
  }
  .foot-brand{
    display:inline-flex;align-items:center;gap:9px;
    font-weight:900;font-size:1.18rem;color:#fff;
    margin-bottom:16px;
  }
  .foot-brand .ico{
    width:30px;height:30px;
    border:1.5px solid rgba(255,255,255,.5);
    border-radius:8px;
    display:inline-flex;align-items:center;justify-content:center;
    font-size:.82rem;color:#fff;
  }
  .foot-inner p{font-size:.9rem;line-height:1.85;color:#a9a5cf;margin:0 0 10px;}
  .foot-col h4{
    font-size:.8rem;
    letter-spacing:.18em;
    text-transform:uppercase;
    font-weight:800;
    color:#fff;
    margin:0 0 18px;
  }
  .foot-col ul{list-style:none;margin:0;padding:0;}
  .foot-col li{margin-bottom:10px;}
  .foot-col a{color:#a9a5cf;font-size:.9rem;transition:color .2s;}
  .foot-col a:hover{color:#fff;}
  .friend-links{
    max-width:1180px;
    margin:48px auto 0;
    padding:28px 22px;
    border-top:1px solid rgba(255,255,255,.12);
  }
  .friend-links h4{
    font-size:.8rem;
    letter-spacing:.18em;
    text-transform:uppercase;
    font-weight:800;
    color:#fff;
    margin:0 0 14px;
  }
  .friend-links .fl-body{
    font-size:.88rem;
    color:#a9a5cf;
    line-height:2;
    word-break:break-all;
  }
  .foot-bottom{
    max-width:1180px;
    margin:0 auto;
    padding:22px;
    border-top:1px solid rgba(255,255,255,.12);
    display:flex;
    flex-wrap:wrap;
    gap:12px;
    justify-content:space-between;
    font-size:.82rem;
    color:#8f8bb8;
  }

  /* ---------- BACK TO TOP ---------- */
  .to-top{
    position:fixed;
    right:22px;
    bottom:26px;
    width:46px;height:46px;
    border-radius:12px;
    border:1.5px solid var(--c-primary);
    background:rgba(245,243,255,.9);
    backdrop-filter:blur(6px);
    color:var(--c-primary);
    font-size:1rem;
    display:flex;align-items:center;justify-content:center;
    cursor:pointer;
    opacity:0;
    visibility:hidden;
    transform:translateY(12px);
    transition:opacity .3s ease,transform .3s ease,visibility .3s,background .25s,color .25s;
    z-index:1100;
  }
  .to-top.show{opacity:1;visibility:visible;transform:translateY(0);}
  .to-top:hover{background:var(--c-primary);color:#fff;}

  /* anchor offset */
  [id]{scroll-margin-top:calc(var(--nav-h) + 16px);}

/* --- 子页面追加 --- */
.nav-links a:hover,.nav-links a.active {color:var(--c-primary)}
.nav-links li {width:100%}
.hero h1 em {font-style:normal;color:var(--c-primary)}
.btn-line,.btn-ghost {
    display:inline-flex;align-items:center;gap:8px;padding:12px 22px;border-radius:11px;
    font-size:14.5px;font-weight:600;text-decoration:none;transition:all .18s;
  }
section.block {padding:44px 0;border-top:1px solid var(--c-line-soft)}
section.block:first-of-type {border-top:none}
.feat-cell {
    background:#fff;border:1px solid var(--c-line);border-radius:14px;padding:22px 22px 20px;
    transition:border-color .18s,transform .18s;
  }
.feat-cell:hover {border-color:var(--c-primary);transform:translateY(-2px)}
.feat-cell .n {
    display:inline-flex;align-items:center;justify-content:center;width:30px;height:30px;border-radius:9px;
    background:var(--c-line-soft);color:var(--c-primary);font-weight:800;font-size:13.5px;margin-bottom:12px;
  }
.feat-cell h3 {font-size:16.5px;font-weight:700;margin:0 0 8px;line-height:1.45}
.feat-cell p {margin:0;font-size:14px;line-height:1.78;color:var(--c-muted)}
.steps {counter-reset:s;list-style:none;margin:0;padding:0}
.steps li {
    position:relative;padding:0 0 22px 52px;border-left:2px solid var(--c-line-soft);margin-left:15px;
  }
.steps li:last-child {border-left-color:transparent;padding-bottom:0}
.steps li::before {
    counter-increment:s;content:counter(s);
    position:absolute;left:-16px;top:0;width:30px;height:30px;border-radius:50%;
    background:linear-gradient(135deg,var(--c-primary),var(--c-accent));color:#fff;
    display:flex;align-items:center;justify-content:center;font-size:13.5px;font-weight:800;
  }
.steps h3 {font-size:16px;font-weight:700;margin:2px 0 6px;line-height:1.45}
.steps p {margin:0;font-size:14.2px;line-height:1.8;color:var(--c-muted)}
.faq-item:last-child {border-bottom:none}
.faq-item summary {
    cursor:pointer;list-style:none;padding:18px 22px;font-size:15.2px;font-weight:600;
    display:flex;align-items:center;justify-content:space-between;gap:14px;line-height:1.5;
  }
.faq-item summary::-webkit-details-marker {display:none}
.faq-item summary::after {
    content:"+";font-size:19px;font-weight:500;color:var(--c-primary);flex-shrink:0;transition:transform .2s;
  }
.faq-item[open] summary::after {content:"–"}
.faq-item .ans {padding:0 22px 20px;font-size:14.2px;line-height:1.85;color:var(--c-muted);margin:0}
.note {
    background:linear-gradient(135deg,rgba(79,70,229,.07),rgba(124,58,237,.07));
    border:1px solid var(--c-line);border-radius:14px;padding:22px 24px;
    font-size:14.2px;line-height:1.85;color:var(--c-text);
  }
.note strong {color:var(--c-primary)}
.note i {color:var(--c-accent);margin-right:7px}
footer.site-foot {
    border-top:1px solid var(--c-line);margin-top:20px;padding:34px 0 40px;
    background:#fff;
  }
.foot-links {display:flex;flex-wrap:wrap;gap:8px 22px;list-style:none;margin:0;padding:0}
.foot-links a {color:var(--c-muted);text-decoration:none;font-size:13.5px}
.foot-links a:hover {color:var(--c-primary)}
.foot-copy {width:100%;margin-top:22px;padding-top:18px;border-top:1px solid var(--c-line-soft);
    font-size:12.8px;color:var(--c-muted);line-height:1.8}

/* --- 子页面追加 --- */
.about-page {padding:calc(var(--nav-h) + 48px) 0 72px;}
.about-hero {
    background:linear-gradient(135deg,#ffffff 0%,#f0ecff 100%);
    border:1px solid var(--c-line);
    border-radius:22px;
    padding:44px 40px;
    margin-bottom:48px;
    position:relative;
    overflow:hidden;
  }
.about-hero::after {
    content:"";
    position:absolute;
    width:280px;height:280px;
    right:-80px;top:-80px;
    background:radial-gradient(circle,rgba(124,58,237,.18),transparent 70%);
    border-radius:50%;
  }
.about-hero h1 {
    font-size:clamp(26px,3.4vw,40px);
    font-weight:800;
    line-height:1.25;
    margin:10px 0 16px;
    letter-spacing:-.5px;
  }
.about-hero h1 em {font-style:normal;color:var(--c-primary);}
.about-hero p {
    color:var(--c-muted);
    font-size:16px;
    line-height:1.85;
    max-width:720px;
    margin:0;
  }
.about-section {margin-bottom:56px;}
.about-section h2 {
    font-size:clamp(20px,2.4vw,26px);
    font-weight:800;
    margin:0 0 18px;
    letter-spacing:-.3px;
    display:flex;
    align-items:center;
    gap:10px;
  }
.about-section h2 .num {
    font-family:'Inter',monospace;
    font-size:14px;
    font-weight:700;
    color:#fff;
    background:var(--c-primary);
    border-radius:8px;
    padding:3px 9px;
    letter-spacing:.5px;
  }
.about-section p {
    color:var(--c-muted);
    line-height:1.9;
    font-size:15.5px;
    margin:0 0 14px;
  }
.about-section p strong {color:var(--c-text);font-weight:600;}
.value-grid {
    display:grid;
    grid-template-columns:repeat(3,1fr);
    gap:18px;
    margin-top:8px;
  }
.value-card {
    background:#fff;
    border:1px solid var(--c-line);
    border-radius:16px;
    padding:24px 22px;
    transition:.25s;
  }
.value-card:hover {
    transform:translateY(-4px);
    box-shadow:0 14px 32px -18px rgba(79,70,229,.45);
    border-color:#c3bbf5;
  }
.value-card .vc-ico {
    width:44px;height:44px;
    display:flex;align-items:center;justify-content:center;
    background:linear-gradient(135deg,var(--c-primary),var(--c-accent));
    color:#fff;
    border-radius:12px;
    font-size:18px;
    margin-bottom:14px;
  }
.value-card h3 {
    font-size:16px;
    font-weight:700;
    margin:0 0 8px;
  }
.value-card p {
    font-size:14px;
    line-height:1.75;
    margin:0;
    color:var(--c-muted);
  }
.about-quote {
    background:linear-gradient(135deg,#4f46e5,#7c3aed);
    color:#fff;
    border-radius:20px;
    padding:36px 38px;
    margin:8px 0 56px;
  }
.about-quote p {
    font-size:clamp(16px,2vw,19px);
    line-height:1.8;
    font-weight:500;
    margin:0 0 14px;
  }
.about-quote span {
    font-size:13px;
    opacity:.85;
  }
.about-list {
    list-style:none;
    padding:0;
    margin:8px 0 0;
    display:grid;
    gap:12px;
  }
.about-list li {
    display:flex;
    gap:12px;
    align-items:flex-start;
    background:#fff;
    border:1px solid var(--c-line-soft);
    border-radius:12px;
    padding:15px 18px;
    font-size:14.5px;
    line-height:1.7;
    color:var(--c-muted);
  }
.about-list li i {
    color:var(--c-primary);
    margin-top:3px;
    font-size:15px;
  }
.about-list li strong {color:var(--c-text);font-weight:600;}
.stat-cell .big-stat {
    font-size:clamp(22px,3vw,30px);
    font-weight:800;
    color:var(--c-primary);
    line-height:1.1;
    display:block;
  }
.stat-cell .hero-num-label {
    display:block;
    margin-top:8px;
    font-size:13px;
    color:var(--c-muted);
  }
.cta-box h3 {
    font-size:19px;
    font-weight:800;
    margin:0 0 6px;
  }
.cta-box p {
    margin:0;
    font-size:14.5px;
    color:var(--c-muted);
  }
.cta-actions {display:flex;gap:12px;flex-wrap:wrap;}
.value-grid {grid-template-columns:1fr 1fr;}
.about-page {padding:calc(var(--nav-h) + 28px) 0 48px;}
.about-hero {padding:30px 22px;border-radius:16px;}
.value-grid {grid-template-columns:1fr;}
.about-quote {padding:26px 22px;border-radius:16px;}

/* --- 子页面追加 --- */
.doc-wrap {max-width:920px;margin:0 auto;padding:0 22px;}
.doc-hero {padding:calc(var(--nav-h) + 56px) 0 8px;}
.doc-hero .eyebrow {display:inline-block;font-size:12px;letter-spacing:.16em;text-transform:uppercase;color:var(--c-accent);font-weight:700;margin-bottom:14px;}
.doc-hero h1 {font-size:clamp(1.7rem,4vw,2.6rem);font-weight:800;line-height:1.25;letter-spacing:-.02em;margin:0 0 16px;}
.doc-hero h1 em {font-style:normal;color:var(--c-primary);}
.doc-hero p {color:var(--c-muted);font-size:15.5px;line-height:1.85;max-width:720px;margin:0;}
.doc-meta {display:flex;flex-wrap:wrap;gap:10px;margin-top:20px;}
.doc-meta .tag {display:inline-flex;align-items:center;gap:7px;font-size:12.5px;font-weight:600;color:var(--c-primary);background:#fff;border:1px solid var(--c-line);border-radius:999px;padding:6px 13px;}
.doc-body {padding:34px 0 10px;}
.doc-card {background:#fff;border:1px solid var(--c-line);border-radius:18px;padding:28px 30px;margin-bottom:22px;}
.doc-card h2 {font-size:1.22rem;font-weight:800;margin:0 0 14px;line-height:1.4;letter-spacing:-.01em;display:flex;align-items:flex-start;gap:11px;}
.doc-card h2 .num {flex:0 0 auto;display:inline-flex;align-items:center;justify-content:center;width:30px;height:30px;border-radius:9px;background:var(--c-primary);color:#fff;font-size:14px;font-weight:800;margin-top:-2px;}
.doc-card h3 {font-size:1rem;font-weight:700;margin:20px 0 8px;color:var(--c-text);}
.doc-card h3:first-of-type {margin-top:4px;}
.doc-card p {color:#3f3b6e;font-size:14.5px;line-height:1.9;margin:0 0 12px;}
.doc-card p:last-child {margin-bottom:0;}
.doc-card ul {margin:0 0 12px;padding-left:0;list-style:none;}
.doc-card ul li {position:relative;padding-left:24px;font-size:14.5px;line-height:1.85;color:#3f3b6e;margin-bottom:9px;}
.doc-card ul li::before {content:"\f0da";font-family:"Font Awesome 6 Free";font-weight:900;color:var(--c-accent);position:absolute;left:4px;top:1px;font-size:12px;}
.doc-card .note {background:var(--c-bg);border:1px solid var(--c-line-soft);border-left:3px solid var(--c-accent);border-radius:10px;padding:14px 16px;font-size:13.8px;line-height:1.85;color:var(--c-muted);}
.doc-card .note strong {color:var(--c-primary);}
.doc-toc {background:#fff;border:1px solid var(--c-line);border-radius:18px;padding:22px 24px;margin-bottom:22px;}
.doc-toc .doc-toc-title {font-size:13px;font-weight:800;letter-spacing:.12em;text-transform:uppercase;color:var(--c-muted);margin-bottom:12px;}
.doc-toc ol {margin:0;padding-left:0;list-style:none;counter-reset:toc;}
.doc-toc ol li {counter-increment:toc;margin-bottom:8px;}
.doc-toc ol li a {color:var(--c-text);text-decoration:none;font-size:14.5px;font-weight:600;display:inline-flex;align-items:baseline;gap:9px;transition:color .18s;}
.doc-toc ol li a::before {content:counter(toc,decimal-leading-zero);font-family:'Inter',monospace;font-size:12px;font-weight:700;color:var(--c-accent);}
.doc-toc ol li a:hover {color:var(--c-primary);}
.doc-cta {background:linear-gradient(135deg,var(--c-primary),var(--c-accent));border-radius:18px;padding:28px 30px;color:#fff;display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:18px;margin:6px 0 46px;}
.doc-cta h2 {font-size:1.15rem;font-weight:800;margin:0 0 6px;color:#fff;}
.doc-cta p {margin:0;font-size:13.8px;line-height:1.7;color:rgba(255,255,255,.85);max-width:520px;}
.doc-cta .btn-line {background:#fff;color:var(--c-primary);border-color:#fff;font-weight:700;text-decoration:none;padding:10px 20px;border-radius:999px;display:inline-block;font-size:14px;transition:transform .18s;}
.doc-cta .btn-line:hover {transform:translateY(-2px);}
.doc-card {padding:22px 20px;}
.doc-toc {padding:18px 18px;}
.doc-cta {padding:22px 20px;}

/* --- 子页面追加 --- */
/* 本页专属少量补充样式，主色沿用站点变量 */
  .rank-hero { padding: 56px 0 32px; }
.rank-hero h1 { font-size: clamp(30px, 5vw, 48px); font-weight: 900; letter-spacing: -0.02em; line-height: 1.15; margin: 14px 0 16px; }
.rank-hero h1 em { font-style: normal; color: var(--c-primary); }
.rank-hero .hero-lede { max-width: 720px; color: var(--c-muted); font-size: 16px; line-height: 1.85; }
.rank-badges { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 22px; }
.rank-badges .tag { font-size: 13px; padding: 6px 14px; border-radius: 999px; background: #fff; border: 1px solid var(--c-line); color: var(--c-primary); font-weight: 600; }
.rank-panel { margin-top: 34px; }
.rank-card { display: flex; align-items: flex-start; gap: 16px; background: #fff; border: 1px solid var(--c-line); border-radius: 16px; padding: 18px 20px; transition: .18s ease; }
.rank-card:hover { border-color: var(--c-primary); transform: translateY(-2px); box-shadow: 0 12px 28px rgba(79,70,229,.10); }
.rank-no { flex: 0 0 46px; width: 46px; height: 46px; border-radius: 12px; display: flex; align-items: center; justify-content: center; font-weight: 800; font-size: 18px; color: #fff; background: var(--c-primary); }
.rank-no.top1 { background: linear-gradient(135deg,#f59e0b,#f97316); }
.rank-no.top2 { background: linear-gradient(135deg,#7c3aed,#4f46e5); }
.rank-no.top3 { background: linear-gradient(135deg,#0ea5e9,#6366f1); }
.rank-body { flex: 1 1 auto; min-width: 0; }
.rank-title { font-weight: 700; font-size: 17px; color: var(--c-text); margin-bottom: 4px; display: flex; flex-wrap: wrap; align-items: center; gap: 8px; }
.rank-title .tag { font-size: 11px; padding: 2px 8px; border-radius: 6px; background: var(--c-line-soft); color: var(--c-accent); font-weight: 600; }
.rank-desc { font-size: 14px; color: var(--c-muted); line-height: 1.7; margin: 0; }
.rank-meta { display: flex; flex-wrap: wrap; gap: 16px; margin-top: 10px; font-size: 12.5px; color: var(--c-muted); font-family: 'Inter', monospace; }
.rank-meta b { color: var(--c-primary); font-weight: 700; }
.rank-table { width: 100%; border-collapse: collapse; background: #fff; border-radius: 16px; overflow: hidden; border: 1px solid var(--c-line); }
.rank-table th, .rank-table td { padding: 13px 16px; text-align: left; font-size: 14px; border-bottom: 1px solid var(--c-line-soft); }
.rank-table thead th { background: var(--c-line-soft); color: var(--c-text); font-weight: 700; font-size: 13px; letter-spacing: .02em; }
.rank-table tbody tr:last-child td { border-bottom: 0; }
.rank-table tbody tr:hover { background: #faf9ff; }
.rank-table .num { font-family: 'Inter', monospace; color: var(--c-primary); font-weight: 700; }
.rank-note { margin-top: 18px; font-size: 13.5px; color: var(--c-muted); line-height: 1.8; }
.cat-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px,1fr)); gap: 16px; margin-top: 22px; }
.cat-box { background: #fff; border: 1px solid var(--c-line); border-radius: 14px; padding: 20px; }
.cat-box .cat-name { font-weight: 700; font-size: 15px; color: var(--c-text); margin-bottom: 10px; display: flex; align-items: center; gap: 8px; }
.cat-box .cat-name i { color: var(--c-primary); }
.cat-box ol { margin: 0; padding-left: 20px; font-size: 13.5px; color: var(--c-muted); line-height: 2; }
.cat-box ol li::marker { color: var(--c-primary); font-weight: 700; }
.rank-card { gap: 12px; padding: 15px; }
.rank-no { flex-basis: 38px; width: 38px; height: 38px; font-size: 15px; }
.rank-title { font-size: 15.5px; }
.rank-table th, .rank-table td { padding: 10px 10px; font-size: 13px; }