:root{
    --main: #64748b;
    --accent: #94a3b8;
    --bg: #f1f5f9;
    --text: #1e293b;
    --border-color: #cbd5e1;
    --font-serif: 'Noto Serif SC', 'Songti SC', 'STSong', serif;
    --font-sans: 'Inter', 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  }
  body{
    background-color: var(--bg);
    color: var(--text);
    font-family: var(--font-sans);
    line-height: 1.8;
    font-weight: 300;
    letter-spacing: 0.02em;
  }
  h1,h2,h3,h4,.brand-font{
    font-family: var(--font-serif);
    font-weight: 600;
    letter-spacing: 0.02em;
  }
  /* 滚动进度条 */
  #scroll-progress{
    position: fixed;
    top: 0; left: 0;
    height: 3px;
    width: 0%;
    background: linear-gradient(90deg, var(--main), var(--accent));
    z-index: 9999;
    transition: width 0.1s;
    border-radius: 2px;
  }
  /* 点阵背景 (hero + body subtle) */
  .dot-bg{
    background-image: radial-gradient(var(--border-color) 1px, transparent 1px);
    background-size: 24px 24px;
  }
  /* hero 视差 */
  .hero-parallax{
    background-image: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" width="60" height="60" viewBox="0 0 60 60"><rect width="60" height="60" fill="%23f1f5f9"/><circle cx="12" cy="12" r="2" fill="%2364748b" opacity="0.2"/><circle cx="48" cy="30" r="3" fill="%2394a3b8" opacity="0.2"/><circle cx="30" cy="48" r="1.5" fill="%2364748b" opacity="0.3"/></svg>');
    background-attachment: fixed;
    background-position: center;
    background-repeat: repeat;
    min-height: 80vh;
    display: flex;
    align-items: center;
    border-bottom: 1px solid var(--border-color);
  }
  /* 渐变文字 */
  .gradient-text{
    background: linear-gradient(130deg, var(--main), #3b4a5f, var(--accent));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
  }
  /* 无阴影卡片，纯描边 */
  .bento-card{
    background: rgba(255,255,255,0.4);
    backdrop-filter: blur(2px);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    padding: 1.8rem 1.5rem;
    transition: border 0.2s, background 0.2s;
    height: 100%;
  }
  .bento-card:hover{
    border-color: var(--main);
    background: rgba(255,255,255,0.7);
  }
  .step-circle{
    width: 44px; height: 44px;
    border: 1px solid var(--main);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 500;
    color: var(--main);
    background: transparent;
  }
  .btn-special{
    border: 1px solid var(--main);
    color: var(--main);
    padding: 0.7rem 2rem;
    border-radius: 60px;
    background: transparent;
    font-weight: 500;
    position: relative;
    overflow: hidden;
    transition: color 0.3s, border-color 0.3s;
    z-index: 1;
  }
  .btn-special::before{
    content: '';
    position: absolute;
    top: 0; left: -100%;
    width: 100%; height: 100%;
    background: linear-gradient(100deg, transparent, rgba(100,116,139,0.15), transparent);
    transition: left 0.5s ease;
    z-index: -1;
  }
  .btn-special:hover{
    color: #fff;
    border-color: var(--main);
    background: var(--main);
  }
  .btn-special:hover::before{
    left: 100%;
  }
  .bento-grid{
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.5rem;
  }
  .col-span-2{ grid-column: span 2; }
  .col-span-4{ grid-column: span 4; }
  .row-span-2{ grid-row: span 2; }
  @media (max-width: 992px) {
    .bento-grid{ grid-template-columns: repeat(2, 1fr); }
    .col-span-2{ grid-column: span 2; }
  }
  @media (max-width: 576px) {
    .bento-grid{ grid-template-columns: 1fr; }
    .col-span-2{ grid-column: span 1; }
  }
  /* 导航栏 */
  .navbar-custom{
    background: rgba(241,245,249,0.7);
    backdrop-filter: blur(6px);
    border-bottom: 1px solid var(--border-color);
    padding: 0.8rem 0;
  }
  .navbar-custom .nav-link{
    color: var(--text) !important;
    margin: 0 0.8rem;
    font-weight: 400;
    opacity: 0.8;
    transition: 0.2s;
    border-bottom: 1px solid transparent;
  }
  .navbar-custom .nav-link:hover{
    opacity: 1;
    border-bottom: 1px solid var(--main);
  }
  .navbar-brand{
    font-family: var(--font-serif);
    font-size: 1.6rem;
    color: var(--text);
    font-weight: 600;
    letter-spacing: 1px;
  }
  .footer{
    border-top: 1px solid var(--border-color);
    background: rgba(255,255,255,0.2);
    padding: 2rem 0;
    margin-top: 5rem;
  }
  .friend-links{
    border-top: 1px dashed var(--border-color);
    padding: 2rem 0 0.5rem;
    margin-top: 3rem;
  }
  a{
    color: var(--main);
    text-decoration: none;
    border-bottom: 1px solid transparent;
  }
  a:hover{
    color: var(--accent);
    border-bottom-color: var(--main);
  }
  .section-title{
    font-size: 1.9rem;
    margin-bottom: 2rem;
    border-left: 4px solid var(--main);
    padding-left: 1.2rem;
  }
  .progress-container{
    position: relative;
  }
  /* 浮动装饰 */
  .float-deco{
    position: absolute;
    border: 1px solid var(--accent);
    border-radius: 50%;
    opacity: 0.2;
    animation: float 7s infinite ease-in-out;
  }
  @keyframes float {
    0%{ transform: translateY(0) rotate(0deg); }
    50%{ transform: translateY(-20px) rotate(6deg); }
    100%{ transform: translateY(0) rotate(0deg); }
  }
  .deco-1{ width: 80px; height: 80px; top: 15%; left: 5%; }
  .deco-2{ width: 130px; height: 130px; bottom: 10%; right: 8%; animation-delay: 2s; }
  .deco-3{ width: 50px; height: 50px; top: 30%; right: 20%; animation-delay: 4s; }
  .bento-img-placeholder{
    background: linear-gradient(145deg, #e2e8f0, #f1f5f9);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    min-height: 160px;
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--accent);
    font-size: 0.9rem;
    letter-spacing: 1px;
  }
  .bento-img-placeholder i{
    font-size: 2rem;
    margin-right: 8px;
    opacity: 0.5;
  }

/* --- 子页面追加 --- */
.about-hero { padding: 100px 0 60px; position: relative; }
.about-hero h1 { font-size: 2.8rem; font-weight: 800; letter-spacing: -0.02em; }
.about-content { padding: 40px 0 80px; }
.about-card { background: var(--bg); border: 1px solid var(--border-color); border-radius: 16px; padding: 32px; margin-bottom: 24px; transition: transform 0.2s ease, box-shadow 0.2s ease; }
.about-card:hover { transform: translateY(-4px); box-shadow: 0 8px 30px rgba(0,0,0,0.06); }
.about-card h2 { font-size: 1.5rem; font-weight: 700; color: var(--main); margin-bottom: 16px; }
.about-card p { color: var(--text); line-height: 1.8; margin-bottom: 12px; }
.about-card ul { color: var(--text); line-height: 1.8; padding-left: 20px; }
.about-card li { margin-bottom: 8px; }
.timeline { position: relative; padding-left: 30px; }
.timeline::before { content: ''; position: absolute; left: 8px; top: 0; bottom: 0; width: 2px; background: var(--border-color); }
.timeline-item { position: relative; margin-bottom: 24px; }
.timeline-item::before { content: ''; position: absolute; left: -26px; top: 6px; width: 12px; height: 12px; border-radius: 50%; background: var(--main); }
.timeline-item h3 { font-size: 1.2rem; font-weight: 600; color: var(--text); margin-bottom: 8px; }
.timeline-item p { color: var(--text); opacity: 0.85; line-height: 1.7; }
.value-tag { display: inline-block; background: var(--main); color: #fff; padding: 4px 14px; border-radius: 20px; font-size: 0.85rem; font-weight: 500; margin-right: 8px; margin-bottom: 8px; }
.about-hero h1 { font-size: 2rem; }
.about-card { padding: 24px; }

/* --- 子页面追加 --- */
/* 页面专属补充样式 */
        .guide-hero {
            background: linear-gradient(135deg, rgba(100,116,139,.08) 0%, rgba(148,163,184,.12) 50%, rgba(100,116,139,.08) 100%);
            border-bottom: 1px solid var(--border-color);
            padding: 4rem 0 3rem;
        }
.guide-card {
            background: #ffffff;
            border: 1px solid var(--border-color);
            border-radius: 12px;
            padding: 2rem 1.8rem;
            transition: box-shadow .25s ease, transform .25s ease;
            height: 100%;
        }
.guide-card:hover {
            box-shadow: 0 12px 28px rgba(30,41,59,.08);
            transform: translateY(-3px);
        }
.guide-card .icon-circle {
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: var(--bg);
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 1.2rem;
            color: var(--main);
            font-size: 1.2rem;
        }
.guide-card h3 {
            font-size: 1.15rem;
            font-weight: 700;
            color: var(--text);
            margin-bottom: .7rem;
            font-family: var(--font-sans);
        }
.guide-card p, .guide-card li {
            font-size: .92rem;
            color: #475569;
            line-height: 1.7;
        }
.guide-card ul {
            padding-left: 1rem;
            margin-bottom: 0;
        }
.guide-card ul li {
            margin-bottom: .4rem;
        }
.step-badge {
            display: inline-block;
            background: var(--main);
            color: #fff;
            font-size: .75rem;
            font-weight: 700;
            padding: .25rem .7rem;
            border-radius: 20px;
            margin-bottom: .8rem;
            letter-spacing: .5px;
        }
.tip-box {
            background: var(--bg);
            border-left: 3px solid var(--main);
            padding: 1rem 1.2rem;
            border-radius: 0 8px 8px 0;
            margin: 1.5rem 0;
            font-size: .92rem;
            color: #475569;
        }
.tip-box i {
            color: var(--main);
            margin-right: .4rem;
        }
.section-sub {
            color: #64748b;
            font-size: .95rem;
            margin-bottom: 2.5rem;
        }
.col-span-8 { grid-column: span 8; }
.col-span-2, .col-span-4, .col-span-8 { grid-column: span 12; }
.guide-hero { padding: 2.5rem 0 2rem; }
.navbar-custom .nav-link:hover,
        .navbar-custom .nav-link.active {
            color: var(--main);
        }
.footer a {
            color: var(--main);
            text-decoration: none;
        }
.footer a:hover {
            text-decoration: underline;
        }
.friend-links a {
            margin-right: 1.2rem;
            font-size: .9rem;
        }

/* --- 子页面追加 --- */
/* 随笔页特有：随笔卡片间距微调、引文样式、手写感点缀 */
    .essay-entry {
      border-left: 3px solid var(--main);
      padding-left: 1.5rem;
      margin-bottom: 3rem;
      transition: border-color .2s ease;
    }
.essay-entry:hover {
      border-left-color: var(--accent);
    }
.essay-entry .essay-meta {
      font-size: .85rem;
      letter-spacing: .3px;
      color: var(--accent);
      font-family: var(--font-sans);
      text-transform: uppercase;
      display: flex;
      flex-wrap: wrap;
      gap: 1rem;
      margin-bottom: .5rem;
    }
.essay-entry h3 {
      font-family: var(--font-serif);
      font-weight: 700;
      color: var(--text);
      margin-bottom: .6rem;
      letter-spacing: -.01em;
    }
.essay-entry p {
      color: var(--text);
      opacity: .88;
      line-height: 1.8;
      font-size: 1rem;
      max-width: 75ch;
    }
.essay-entry .btn-special {
      margin-top: .8rem;
    }
.section-title:after {
      content: "";
      display: block;
      width: 60px;
      height: 2px;
      background: var(--accent);
      margin-top: .5rem;
    }
/* 覆盖 bootstrap 可能带来的白底（本页未用 .card，但以防万一） */
    .card, .card-body, .card-header, .card-footer {
      background: transparent !important;
      color: var(--text) !important;
      border-color: var(--border-color) !important;
    }
.form-control, .form-select {
      background: rgba(255,255,255,.7);
      color: var(--text);
      border-color: var(--border-color);
    }
.form-control::placeholder {
      color: var(--accent);
    }

/* --- 子页面追加 --- */
/* 本页专属补充样式 */
        .subscribe-hero { padding: 5rem 0 3rem; }
.subscribe-card { background: #fff; border: 1px solid var(--border-color); border-radius: 1rem; padding: 2rem; transition: transform .2s ease, box-shadow .2s ease; }
.subscribe-card:hover { transform: translateY(-4px); box-shadow: 0 12px 24px rgba(0,0,0,.06); }
.subscribe-price { font-size: 3.5rem; font-weight: 800; color: var(--main); line-height: 1; }
.subscribe-price span { font-size: 1.2rem; font-weight: 400; color: var(--accent); }
.subscribe-feature { padding: .5rem 0; border-bottom: 1px dashed var(--border-color); display: flex; align-items: center; gap: .5rem; }
.subscribe-feature:last-child { border-bottom: none; }
.subscribe-feature i { color: var(--main); width: 1.4rem; }
.subscribe-btn { background: var(--main); color: #fff; border: none; padding: .8rem 2rem; border-radius: 2rem; font-weight: 600; transition: all .2s; display: inline-block; text-decoration: none; }
.subscribe-btn:hover { background: var(--accent); color: #fff; transform: scale(1.02); }
.subscribe-note { font-size: .9rem; color: var(--accent); margin-top: 1rem; }
.step-number { width: 2.5rem; height: 2.5rem; border-radius: 50%; background: var(--main); color: #fff; display: flex; align-items: center; justify-content: center; font-weight: 700; margin-right: 1rem; flex-shrink: 0; }
.subscribe-form .form-control { background: #fff; border: 1px solid var(--border-color); border-radius: .5rem; padding: .8rem 1.2rem; color: var(--text); }
.subscribe-form .form-control:focus { border-color: var(--main); box-shadow: 0 0 0 .2rem rgba(100,116,139,.15); }
.subscribe-form .form-label { color: var(--text); font-weight: 600; }
.faq-item { background: #fff; border: 1px solid var(--border-color); border-radius: .75rem; padding: 1.5rem; margin-bottom: 1rem; }
.faq-item h4 { color: var(--main); font-size: 1.1rem; margin-bottom: .5rem; }
.faq-item p { margin-bottom: 0; color: var(--text); font-size: .95rem; line-height: 1.7; }
.badge-new { background: var(--accent); color: #fff; font-size: .75rem; padding: .25rem .75rem; border-radius: 1rem; margin-left: .5rem; vertical-align: middle; }
.email-highlight { background: rgba(100,116,139,.1); border-left: 4px solid var(--main); padding: 1rem 1.5rem; border-radius: .5rem; margin: 1.5rem 0; }

/* --- 子页面追加 --- */
.privacy-hero {
            padding: 100px 0 60px;
            position: relative;
        }
.privacy-content {
            padding: 40px 0 80px;
        }
.privacy-card {
            background: #fff;
            border: 1px solid var(--border-color);
            border-radius: 12px;
            padding: 32px;
            margin-bottom: 24px;
            transition: transform 0.3s ease, box-shadow 0.3s ease;
        }
.privacy-card:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 30px rgba(100, 116, 139, 0.12);
        }
.privacy-icon {
            width: 48px;
            height: 48px;
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: linear-gradient(135deg, var(--main), var(--accent));
            color: #fff;
            font-size: 20px;
            margin-bottom: 16px;
        }
.privacy-list {
            list-style: none;
            padding: 0;
            margin: 16px 0 0;
        }
.privacy-list li {
            padding: 8px 0;
            padding-left: 24px;
            position: relative;
            color: var(--text);
            font-size: 0.95rem;
            line-height: 1.6;
        }
.privacy-list li::before {
            content: '✓';
            position: absolute;
            left: 0;
            color: var(--main);
            font-weight: 600;
        }
.privacy-note {
            background: rgba(100, 116, 139, 0.06);
            border-left: 4px solid var(--main);
            padding: 16px 20px;
            border-radius: 0 8px 8px 0;
            margin: 24px 0;
            font-size: 0.9rem;
            line-height: 1.7;
        }
.privacy-hero {
                padding: 80px 0 40px;
            }
.privacy-card {
                padding: 24px;
            }

/* --- 子页面追加 --- */
/* 本页专属补充样式 */
        .disclaimer-hero { padding: 4rem 0 2rem; }
.disclaimer-card { background: #fff; border: 1px solid var(--border-color); border-radius: 1rem; padding: 1.5rem 2rem; margin-bottom: 1.5rem; transition: box-shadow .3s ease; }
.disclaimer-card:hover { box-shadow: 0 4px 20px rgba(100,116,139,.15); }
.disclaimer-card h2 { color: var(--main); font-size: 1.35rem; font-weight: 700; margin-bottom: 1rem; display: flex; align-items: center; gap: .5rem; }
.disclaimer-card h2 i { font-size: 1.1rem; }
.disclaimer-card p, .disclaimer-card li { color: var(--text); font-size: .95rem; line-height: 1.8; }
.disclaimer-card ul { padding-left: 1.2rem; }
.disclaimer-card li { margin-bottom: .4rem; }
.disclaimer-card .highlight { background: rgba(100,116,139,.08); padding: .2rem .5rem; border-radius: .3rem; font-weight: 500; }
.disclaimer-footer-note { font-size: .85rem; color: #64748b; border-top: 1px solid var(--border-color); padding-top: 1.5rem; margin-top: 2rem; text-align: center; }
.update-badge { display: inline-block; background: var(--main); color: #fff; font-size: .75rem; padding: .2rem .8rem; border-radius: 2rem; margin-left: .5rem; vertical-align: middle; }
.disclaimer-card { padding: 1rem 1.25rem; }