:root{
    --primary:#4f46e5;
    --accent:#7c3aed;
    --bg:#f5f3ff;
    --text:#1e1b4b;
    --line:#1e1b4b;
    --paper:#ffffff;
    --soft:#e9e5ff;
    --shadow:8px 8px 0 var(--line);
  }
  *{border-radius:0 !important;box-sizing:border-box;}
  html{scroll-behavior:smooth;}
  body{
    font-family:'Inter',"Helvetica Neue",Arial,"PingFang SC","Microsoft YaHei",sans-serif;
    background:var(--bg);
    color:var(--text);
    font-weight:400;
    line-height:1.75;
    background-image:
      linear-gradient(to right, rgba(79,70,229,.07) 1px, transparent 1px),
      linear-gradient(to bottom, rgba(79,70,229,.07) 1px, transparent 1px);
    background-size:34px 34px;
  }
  h1,h2,h3,h4,h5,.heavy{font-weight:900;letter-spacing:-.5px;}
  .mono{font-family:"SFMono-Regular",Consolas,"Liberation Mono",Menlo,monospace;}
  a{color:var(--primary);text-decoration:none;}
  a:hover{color:var(--accent);}

  /* 顶部阅读进度条 */
  #progressBar{
    position:fixed;top:0;left:0;height:6px;width:0%;
    background:linear-gradient(90deg,var(--primary),var(--accent));
    z-index:2000;
  }

  /* 导航 */
  .topnav{
    background:var(--paper);
    border-bottom:4px solid var(--line);
    position:sticky;top:0;z-index:1500;
  }
  .brand-link{
    font-weight:900;font-size:1.45rem;color:var(--text)!important;
    letter-spacing:-.6px;display:flex;align-items:center;gap:.5rem;
  }
  .brand-link .brand-icon{
    display:inline-flex;align-items:center;justify-content:center;
    width:38px;height:38px;background:var(--accent);color:#fff;
    border:3px solid var(--line);box-shadow:3px 3px 0 var(--line);
    font-size:1.05rem;
  }
  .nav-item-link{
    font-weight:700;color:var(--text)!important;padding:.45rem .85rem;
    border:3px solid transparent;transition:.18s;
  }
  .nav-item-link:hover{
    border:3px solid var(--line);background:var(--soft);
    box-shadow:3px 3px 0 var(--line);
  }
  .navbar-toggler{border:3px solid var(--line);box-shadow:3px 3px 0 var(--line);}
  .navbar-toggler:focus{box-shadow:3px 3px 0 var(--line);}

  /* 通用块 */
  .block{
    background:var(--paper);
    border:4px solid var(--line);
    box-shadow:var(--shadow);
    padding:2rem;
  }
  .eyebrow{
    display:inline-block;background:var(--accent);color:#fff;
    font-weight:800;font-size:.78rem;letter-spacing:2px;
    padding:.3rem .8rem;border:3px solid var(--line);
    box-shadow:4px 4px 0 var(--line);text-transform:uppercase;
  }
  .sec-title{font-size:clamp(1.7rem,4vw,2.7rem);line-height:1.15;margin:1rem 0 .6rem;}
  .sec-sub{color:#4b4685;font-size:1rem;max-width:760px;}

  /* Hero */
  .hero{
    background:var(--paper);
    border:4px solid var(--line);
    box-shadow:var(--shadow);
    padding:clamp(1.6rem,4vw,3.4rem);
    position:relative;
    overflow:hidden;
    margin-top:2.5rem;
  }
  .hero::before{
    content:"";position:absolute;inset:0;
    background-image:radial-gradient(var(--primary) 1.2px, transparent 1.2px);
    background-size:18px 18px;opacity:.16;pointer-events:none;
  }
  .type-target{
    font-size:clamp(2rem,6.2vw,4.2rem);
    font-weight:900;line-height:1.05;letter-spacing:-2px;
    min-height:1.2em;
  }
  .type-target .caret{
    display:inline-block;width:.55ch;background:var(--accent);
    color:transparent;animation:blink 1s steps(1) infinite;
  }
  @keyframes blink{50%{opacity:0}}
  .hero-stat{
    border:4px solid var(--line);background:var(--soft);
    padding:1rem 1.1rem;box-shadow:5px 5px 0 var(--line);
  }
  .hero-stat .num{font-size:2.1rem;font-weight:900;line-height:1;color:var(--primary);}
  .hero-stat .lbl{font-size:.8rem;font-weight:700;letter-spacing:1px;margin-top:.35rem;}

  /* 按钮 */
  .btn-hard{
    display:inline-flex;align-items:center;gap:.55rem;
    background:var(--primary);color:#fff;font-weight:800;
    border:4px solid var(--line);box-shadow:6px 6px 0 var(--line);
    padding:.85rem 1.7rem;position:relative;overflow:hidden;
    transition:transform .15s,box-shadow .15s;letter-spacing:.5px;
  }
  .btn-hard:hover{color:#fff;transform:translate(-2px,-2px);box-shadow:9px 9px 0 var(--line);}
  .btn-hard::after{
    content:"";position:absolute;top:0;left:-120%;width:60%;height:100%;
    background:linear-gradient(100deg,transparent,rgba(255,255,255,.65),transparent);
    transition:left .55s ease;
  }
  .btn-hard:hover::after{left:130%;}
  .btn-hard.alt{background:var(--paper);color:var(--text);}
  .btn-hard.alt:hover{color:var(--primary);}
  .btn-hard.accent{background:var(--accent);}

  /* 时间线 */
  .timeline{position:relative;margin-top:2.4rem;padding-left:0;}
  .timeline::before{
    content:"";position:absolute;left:22px;top:6px;bottom:6px;width:5px;
    background:var(--line);
  }
  @media(min-width:768px){
    .timeline::before{left:50%;transform:translateX(-50%);}
  }
  .tl-item{position:relative;padding-left:60px;margin-bottom:2.2rem;}
  .tl-dot{
    position:absolute;left:9px;top:4px;width:30px;height:30px;
    background:var(--accent);border:4px solid var(--line);
    display:flex;align-items:center;justify-content:center;
    color:#fff;font-size:.72rem;font-weight:900;z-index:2;
  }
  .tl-card{
    background:var(--paper);border:4px solid var(--line);
    box-shadow:6px 6px 0 var(--line);padding:1.2rem 1.3rem;
  }
  .tl-card h4{font-size:1.12rem;margin-bottom:.4rem;}
  @media(min-width:768px){
    .tl-item{width:50%;padding-left:0;padding-right:56px;}
    .tl-item:nth-child(even){margin-left:50%;padding-right:0;padding-left:56px;}
    .tl-item:nth-child(odd) .tl-dot{left:auto;right:-60px;transform:translateX(50%);}
    .tl-item:nth-child(even) .tl-dot{left:-60px;transform:translateX(50%);}
  }

  /* 对比表格 */
  .table-hard{
    border:4px solid var(--line);background:var(--paper);
    box-shadow:var(--shadow);width:100%;border-collapse:collapse;
  }
  .table-hard th{
    background:var(--primary);color:#fff;font-weight:900;
    padding:1rem;border:3px solid var(--line);text-align:left;
    font-size:.95rem;letter-spacing:.5px;
  }
  .table-hard td{
    padding:.95rem 1rem;border:3px solid var(--line);
    vertical-align:top;font-size:.95rem;
  }
  .table-hard tbody tr:nth-child(odd){background:var(--soft);}
  .table-hard tbody tr:hover{background:#ded7ff;}

  /* FAQ */
  .faq-item{
    border:4px solid var(--line);background:var(--paper);
    box-shadow:6px 6px 0 var(--line);margin-bottom:1.1rem;
  }
  .faq-q{
    width:100%;text-align:left;background:none;border:0;
    font-weight:900;font-size:1.03rem;padding:1.1rem 1.2rem;
    display:flex;justify-content:space-between;align-items:center;gap:1rem;
    color:var(--text);cursor:pointer;
  }
  .faq-q:focus{outline:3px solid var(--accent);outline-offset:-6px;}
  .faq-q i{color:var(--accent);transition:transform .25s;flex:0 0 auto;}
  .faq-item.open .faq-q i{transform:rotate(45deg);}
  .faq-a{
    max-height:0;overflow:hidden;transition:max-height .32s ease;
    padding:0 1.2rem;
  }
  .faq-a p{padding:.2rem 0 1.1rem;margin:0;color:#3b3670;}

  /* 标签页特色 */
  .tab-bar{display:flex;flex-wrap:wrap;gap:.6rem;margin-bottom:1.4rem;}
  .tab-btn{
    background:var(--paper);border:4px solid var(--line);
    font-weight:800;padding:.6rem 1.15rem;color:var(--text);
    box-shadow:4px 4px 0 var(--line);transition:.15s;font-size:.92rem;
  }
  .tab-btn:hover{background:var(--soft);transform:translate(-1px,-1px);box-shadow:6px 6px 0 var(--line);}
  .tab-btn.active{background:var(--primary);color:#fff;}
  .tab-panel{display:none;}
  .tab-panel.active{display:block;animation:fadeIn .35s ease;}
  @keyframes fadeIn{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:none}}
  .feature-card{
    border:4px solid var(--line);background:var(--paper);
    box-shadow:6px 6px 0 var(--line);padding:1.3rem;height:100%;
  }
  .feature-card .fi{
    width:46px;height:46px;background:var(--accent);color:#fff;
    border:3px solid var(--line);box-shadow:3px 3px 0 var(--line);
    display:flex;align-items:center;justify-content:center;
    font-size:1.15rem;margin-bottom:.9rem;
  }
  .feature-card h5{font-size:1.05rem;margin-bottom:.4rem;}

  /* 图片懒加载渐显 */
  .lazy-wrap{
    position:relative;overflow:hidden;
    border:4px solid var(--line);box-shadow:5px 5px 0 var(--line);
    background:var(--soft);aspect-ratio:3/4;
  }
  .lazy-wrap::before{
    content:"";position:absolute;inset:0;
    background-image:linear-gradient(90deg,transparent,rgba(124,58,237,.18),transparent);
    background-size:200% 100%;animation:shimmer 1.4s linear infinite;
  }
  .lazy-wrap img{
    width:100%;height:100%;object-fit:cover;display:block;
    opacity:0;transition:opacity .55s ease;position:relative;z-index:2;
  }
  .lazy-wrap img.loaded{opacity:1;}
  .lazy-wrap.done::before{display:none;}
  @keyframes shimmer{0%{background-position:200% 0}100%{background-position:-200% 0}}
  .poster-cap{
    border:4px solid var(--line);border-top:0;background:var(--paper);
    box-shadow:5px 5px 0 var(--line);padding:.6rem .7rem;
  }
  .poster-cap strong{font-size:.92rem;display:block;line-height:1.35;}
  .poster-cap span{font-size:.76rem;color:#5a548f;}

  /* CTA */
  .cta-block{
    background:linear-gradient(135deg,var(--primary),var(--accent));
    color:#fff;border:4px solid var(--line);box-shadow:var(--shadow);
    padding:clamp(1.8rem,5vw,3.4rem);position:relative;overflow:hidden;
  }
  .cta-block::after{
    content:"";position:absolute;inset:0;
    background-image:radial-gradient(rgba(255,255,255,.35) 1px,transparent 1px);
    background-size:20px 20px;opacity:.35;pointer-events:none;
  }
  .cta-block h2,.cta-block p{position:relative;z-index:2;}

  /* 滚动渐显 */
  .reveal{opacity:0;transform:translateY(26px);transition:opacity .6s ease,transform .6s ease;}
  .reveal.in{opacity:1;transform:none;}

  /* 页脚 */
  .site-footer{
    background:var(--paper);border-top:5px solid var(--line);
    margin-top:3.5rem;padding:2.6rem 0 1.6rem;
  }
  .friend-links{
    border:4px solid var(--line);background:var(--soft);
    box-shadow:5px 5px 0 var(--line);padding:1.1rem 1.2rem;
    margin-bottom:2rem;
  }
  .friend-links h6{font-weight:900;letter-spacing:1px;margin-bottom:.55rem;}
  .footer-link{color:var(--text);font-weight:700;margin-right:1.1rem;display:inline-block;}
  .footer-link:hover{color:var(--accent);}
  .chip{
    display:inline-block;border:3px solid var(--line);background:var(--soft);
    font-size:.75rem;font-weight:800;padding:.15rem .6rem;margin:.15rem .25rem .15rem 0;
  }
  .text-soft{color:#4b4685;}
  section{scroll-margin-top:96px;}

/* --- 子页面追加 --- */
.about-hero-img {
    width:100%;
    border:3px solid var(--line);
    border-radius:18px;
    box-shadow:var(--shadow);
    display:block;
    object-fit:cover;
    aspect-ratio:16/10;
  }
.value-card {
    background:var(--paper);
    border:3px solid var(--line);
    border-radius:16px;
    box-shadow:var(--shadow);
    padding:1.4rem 1.5rem;
    height:100%;
  }
.value-card h3 {
    font-size:1.08rem;
    font-weight:800;
    margin:.9rem 0 .55rem;
    color:var(--text);
  }
.value-card p {
    font-size:.94rem;
    line-height:1.75;
    margin:0;
    color:var(--text);
    opacity:.82;
  }
.value-ico {
    width:46px;height:46px;
    display:inline-flex;align-items:center;justify-content:center;
    border:3px solid var(--line);
    border-radius:12px;
    background:var(--soft);
    color:var(--primary);
    font-size:1.1rem;
  }
.fact-line {
    display:flex;
    justify-content:space-between;
    gap:1rem;
    padding:.7rem 0;
    border-bottom:2px dashed var(--soft);
    font-size:.94rem;
  }
.fact-line:last-child {border-bottom:0;}
.fact-line span:first-child {font-weight:700;}
.fact-line span:last-child {opacity:.8;text-align:right;}
.quote-block {
    border-left:6px solid var(--accent);
    background:var(--soft);
    border-radius:0 14px 14px 0;
    padding:1.1rem 1.3rem;
    font-size:.98rem;
    line-height:1.8;
    box-shadow:6px 6px 0 var(--line);
  }
.fact-line {flex-direction:column;gap:.2rem;}
.fact-line span:last-child {text-align:left;}

/* --- 子页面追加 --- */
/* 本页专属的少量补充样式，沿用站点配色变量 */
  .guide-hero { padding: 56px 0 40px; }
.guide-hero .hero-inner {
    background: var(--paper);
    border: 3px solid var(--line);
    border-radius: 18px;
    box-shadow: var(--shadow);
    padding: 38px 32px;
  }
.guide-hero h1 {
    font-weight: 900;
    font-size: clamp(1.7rem, 4vw, 2.7rem);
    line-height: 1.25;
    color: var(--text);
    margin: 10px 0 14px;
  }
.guide-hero .lead-txt {
    color: var(--text);
    opacity: .82;
    font-size: 1rem;
    line-height: 1.85;
    max-width: 780px;
  }
.guide-hero .hero-chips { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 22px; }
.chip i { color: var(--primary); }
.guide-block { margin-top: 30px; }
.step-card {
    background: var(--paper);
    border: 3px solid var(--line);
    border-radius: 16px;
    box-shadow: var(--shadow);
    padding: 24px 24px 20px;
    height: 100%;
    transition: transform .18s ease, box-shadow .18s ease;
  }
.step-card:hover { transform: translate(-3px,-3px); box-shadow: 12px 12px 0 var(--line); }
.step-card .step-num {
    display: inline-flex; align-items: center; justify-content: center;
    width: 40px; height: 40px; border-radius: 12px;
    background: var(--primary);
    color: #fff;
    font-weight: 900;
    font-family: 'Inter',sans-serif;
    border: 2px solid var(--line);
    margin-bottom: 12px;
  }
.step-card h3 {
    font-size: 1.08rem;
    font-weight: 800;
    color: var(--text);
    margin: 0 0 10px;
  }
.step-card p {
    font-size: .92rem;
    line-height: 1.8;
    color: var(--text);
    opacity: .84;
    margin: 0;
  }
.step-card p + p { margin-top: 8px; }
.reader-keys { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 16px; }
.key-item {
    display: flex; align-items: center; gap: 10px;
    background: var(--paper);
    border: 2px solid var(--line);
    border-radius: 12px;
    padding: 10px 16px;
    font-size: .88rem;
    color: var(--text);
    font-weight: 500;
  }
.key-item kbd {
    background: var(--soft);
    border: 2px solid var(--line);
    border-bottom-width: 4px;
    border-radius: 8px;
    color: var(--text);
    font-family: 'Inter',monospace;
    font-weight: 700;
    font-size: .82rem;
    padding: 2px 9px;
  }
.note-box {
    margin-top: 26px;
    background: var(--soft);
    border: 3px dashed var(--line);
    border-radius: 16px;
    padding: 20px 24px;
    color: var(--text);
    font-size: .92rem;
    line-height: 1.85;
  }
.note-box strong { color: var(--accent); }
.mini-title {
    font-size: 1.35rem;
    font-weight: 900;
    color: var(--text);
    margin: 0 0 6px;
  }
.mini-sub {
    font-size: .92rem;
    color: var(--text);
    opacity: .72;
    margin: 0 0 20px;
  }
.guide-hero .hero-inner { padding: 26px 20px; }
.step-card { padding: 20px 18px 16px; }