:root {
      --ymc-primary: #0891b2;
      --ymc-accent: #0ea5e9;
      --ymc-bg: #ecfeff;
      --ymc-ink: #083344;
      --ymc-radius-lg: 22px;
      --ymc-radius-md: 18px;
      --ymc-radius-sm: 12px;
      --ymc-shadow: 0 12px 30px -8px rgba(8, 145, 178, 0.12);
      --ymc-shadow-hover: 0 20px 35px -10px rgba(8, 145, 178, 0.18);
    }
    
    body {
      background-color: var(--ymc-bg);
      color: var(--ymc-ink);
      font-family: 'Inter', sans-serif;
      font-size: 0.95rem;
      line-height: 1.6;
      position: relative;
      overflow-x: hidden;
    }
    
    /* 细微噪点纹理 */
    body::before {
      content: "";
      position: fixed;
      top: 0; left: 0; width: 100%; height: 100%;
      background-image: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" width="160" height="160"><filter id="n"><feTurbulence type="fractalNoise" baseFrequency="0.9" numOctaves="3" result="noise"/><feColorMatrix type="matrix" values="0.1 0 0 0 0.08 0 0.1 0 0 0.08 0 0 0.1 0 0.08 0 0 0 0.05 0"/></filter><rect width="100%25" height="100%25" filter="url(%23n)" opacity="0.03"/></svg>');
      pointer-events: none;
      z-index: 9999;
      opacity: 0.6;
    }
    
    /* 大圆角柔和风格 */
    .rounded-card {
      border-radius: var(--ymc-radius-lg);
      box-shadow: var(--ymc-shadow);
      transition: box-shadow 0.2s, transform 0.2s;
      background: white;
    }
    
    .rounded-card:hover {
      box-shadow: var(--ymc-shadow-hover);
      transform: translateY(-3px);
    }
    
    /* 单色描边图标 */
    .icon-outline {
      color: var(--ymc-primary);
      stroke: currentColor;
      fill: none;
      stroke-width: 1.5;
    }
    
    .section-padding {
      padding: 4.5rem 0;
    }
    
    /* 渐变文字 hero */
    .gradient-text {
      background: linear-gradient(120deg, #0891b2, #0ea5e9, #67e8f9);
      -webkit-background-clip: text;
      background-clip: text;
      color: transparent;
      font-weight: 900;
      letter-spacing: -0.02em;
    }
    
    /* 浮动装饰 */
    .float-orb {
      position: absolute;
      border-radius: 50%;
      background: radial-gradient(circle at 30% 30%, #a5f3fc, #67e8f9);
      filter: blur(12px);
      opacity: 0.25;
      pointer-events: none;
      z-index: -1;
    }
    
    /* 按钮光泽扫过 */
    .btn-shine {
      position: relative;
      overflow: hidden;
      transition: background-color 0.2s;
    }
    .btn-shine::after {
      content: '';
      position: absolute;
      top: 0; left: -100%;
      width: 60%; height: 100%;
      background: linear-gradient(100deg, transparent, rgba(255,255,255,0.5), transparent);
      transform: skewX(-20deg);
      transition: left 0.6s ease;
    }
    .btn-shine:hover::after {
      left: 150%;
    }
    
    /* 编号清单 */
    .steps-list {
      counter-reset: step-counter;
      list-style: none;
      padding-left: 0;
    }
    .steps-list li {
      counter-increment: step-counter;
      position: relative;
      padding: 1rem 1.2rem 1rem 3.8rem;
      margin-bottom: 1rem;
      background: #f0fdfa;
      border-radius: var(--ymc-radius-md);
      border-left: 4px solid var(--ymc-primary);
      font-weight: 500;
    }
    .steps-list li::before {
      content: counter(step-counter);
      position: absolute;
      left: 1rem;
      top: 1rem;
      width: 2rem;
      height: 2rem;
      background: var(--ymc-primary);
      color: white;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
      font-size: 0.9rem;
      box-shadow: 0 4px 8px rgba(8,145,178,0.2);
    }
    
    /* 等宽数据 */
    .mono-data {
      font-family: 'SFMono-Regular', 'Menlo', 'Consolas', monospace;
      font-weight: 600;
    }
    
    /* 横向时间线 */
    .timeline-x {
      display: flex;
      overflow-x: auto;
      gap: 1.5rem;
      padding: 1.5rem 0.25rem;
      scrollbar-width: thin;
      scrollbar-color: var(--ymc-primary) #e0f2fe;
    }
    .timeline-x::-webkit-scrollbar {
      height: 8px;
    }
    .timeline-x::-webkit-scrollbar-thumb {
      background: var(--ymc-primary);
      border-radius: 20px;
    }
    
    .timeline-item {
      min-width: 220px;
      background: white;
      border-radius: var(--ymc-radius-md);
      padding: 1.2rem;
      border-top: 4px solid var(--ymc-accent);
      box-shadow: var(--ymc-shadow);
    }
    
    /* 滚动动效 */
    .fade-up {
      opacity: 0;
      transform: translateY(25px);
      transition: opacity 0.7s ease, transform 0.7s ease;
    }
    .fade-up.show {
      opacity: 1;
      transform: translateY(0);
    }
    
    /* 导航折叠自定义 */
    .navbar-ymc {
      background: rgba(236, 254, 255, 0.8);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid #cffafe;
    }
    
    .footer-link {
      color: var(--ymc-ink);
      text-decoration: none;
      border-bottom: 1px dotted #0891b2;
    }

/* --- 子页面追加 --- */
/* 页面专属样式 - 关于页 */
        .about-hero { position: relative; overflow: hidden; }
.about-hero .container { position: relative; z-index: 2; }
.stat-card { background: rgba(255,255,255,0.7); border-radius: var(--ymc-radius-md); padding: 2rem 1.5rem; text-align: center; transition: transform 0.3s ease, box-shadow 0.3s ease; }
.stat-card:hover { transform: translateY(-6px); box-shadow: var(--ymc-shadow-hover); }
.stat-num { font-size: 2.6rem; font-weight: 800; color: var(--ymc-primary); font-family: 'Inter', sans-serif; }
.stat-label { color: var(--ymc-ink); font-weight: 600; margin-top: 0.3rem; }
.feature-item { background: rgba(255,255,255,0.65); border-radius: var(--ymc-radius-md); padding: 1.8rem; height: 100%; transition: all 0.3s ease; border-left: 4px solid var(--ymc-primary); }
.feature-item:hover { box-shadow: var(--ymc-shadow-hover); transform: translateY(-4px); }
.feature-icon { width: 48px; height: 48px; border-radius: 14px; background: rgba(8,145,178,0.12); display: flex; align-items: center; justify-content: center; margin-bottom: 1rem; font-size: 1.4rem; color: var(--ymc-primary); }
.section-label { display: inline-block; background: rgba(8,145,178,0.1); color: var(--ymc-primary); font-weight: 600; padding: 0.35rem 1rem; border-radius: 50px; font-size: 0.85rem; letter-spacing: 0.5px; margin-bottom: 1rem; }
.value-item { padding: 1.5rem; border-radius: var(--ymc-radius-md); background: rgba(255,255,255,0.5); transition: all 0.3s ease; }
.value-item:hover { background: rgba(255,255,255,0.8); box-shadow: var(--ymc-shadow); }
.value-item i { font-size: 1.8rem; color: var(--ymc-primary); margin-bottom: 0.8rem; }
.content-block { background: rgba(255,255,255,0.5); border-radius: var(--ymc-radius-lg); padding: 2rem; margin-bottom: 2rem; }
.content-block h3 { color: var(--ymc-ink); font-weight: 700; margin-bottom: 1rem; }
.content-block p { color: rgba(8,51,68,0.75); line-height: 1.8; }
.timeline-x::before { content: ''; position: absolute; left: 8px; top: 0; bottom: 0; width: 2px; background: linear-gradient(to bottom, var(--ymc-primary), var(--ymc-accent)); border-radius: 2px; }
.timeline-item::before { content: ''; position: absolute; left: -1.9rem; top: 6px; width: 14px; height: 14px; border-radius: 50%; background: var(--ymc-primary); border: 3px solid var(--ymc-bg); box-shadow: 0 0 0 2px var(--ymc-primary); }
.timeline-item h4 { font-weight: 700; color: var(--ymc-ink); margin-bottom: 0.4rem; }
.timeline-item p { color: rgba(8,51,68,0.7); line-height: 1.7; }
.about-footer-note { border-top: 1px solid rgba(8,145,178,0.15); padding-top: 2rem; margin-top: 2rem; }
.nav-link.active { color: var(--ymc-primary) !important; font-weight: 700; }
.stat-card { margin-bottom: 1rem; }
.content-block { padding: 1.5rem; }

/* --- 子页面追加 --- */
/* 本页专属样式 — 隐私页 */
        .privacy-hero { position: relative; overflow: hidden; }
.privacy-card { background: var(--ymc-bg); border: 1px solid rgba(8, 145, 178, 0.12); border-radius: var(--ymc-radius-md); padding: 2rem; transition: all 0.3s ease; }
.privacy-card:hover { box-shadow: var(--ymc-shadow-hover); transform: translateY(-3px); }
.privacy-list { list-style: none; padding-left: 0; }
.privacy-list li { padding: 0.65rem 0; padding-left: 2rem; position: relative; color: var(--ymc-ink); border-bottom: 1px dashed rgba(8, 145, 178, 0.1); }
.privacy-list li:last-child { border-bottom: none; }
.privacy-list li::before { content: "\f058"; font-family: "Font Awesome 6 Free"; font-weight: 900; position: absolute; left: 0; color: var(--ymc-primary); opacity: 0.7; }
.privacy-badge { display: inline-block; background: rgba(8, 145, 178, 0.1); color: var(--ymc-primary); font-weight: 700; font-size: 0.8rem; padding: 0.25rem 0.75rem; border-radius: 50px; letter-spacing: 0.5px; }
.data-table { width: 100%; border-collapse: collapse; margin: 1.5rem 0; }
.data-table th { background: rgba(8, 145, 178, 0.08); color: var(--ymc-primary); font-weight: 700; padding: 0.9rem 1.2rem; text-align: left; border: 1px solid rgba(8, 145, 178, 0.12); }
.data-table td { padding: 0.9rem 1.2rem; border: 1px solid rgba(8, 145, 178, 0.08); color: var(--ymc-ink); }
.data-table tr:hover td { background: rgba(8, 145, 178, 0.03); }
.privacy-note { background: linear-gradient(135deg, rgba(8, 145, 178, 0.06), rgba(14, 165, 233, 0.04)); border-left: 4px solid var(--ymc-primary); border-radius: 0 var(--ymc-radius-sm) var(--ymc-radius-sm) 0; padding: 1.5rem; margin: 2rem 0; }
.privacy-note i { color: var(--ymc-primary); margin-right: 0.5rem; }
.privacy-highlight { color: var(--ymc-primary); font-weight: 700; }
.privacy-strong { font-weight: 700; color: var(--ymc-ink); }
.privacy-section-title { font-weight: 800; letter-spacing: -0.5px; color: var(--ymc-ink); position: relative; padding-left: 1.5rem; margin-bottom: 1.5rem; }
.privacy-section-title::before { content: ""; position: absolute; left: 0; top: 0; bottom: 0; width: 5px; background: var(--ymc-primary); border-radius: 10px; opacity: 0.6; }
.privacy-muted { color: rgba(8, 51, 68, 0.6); font-size: 0.95rem; }

/* --- 子页面追加 --- */
.contact-hero {
            position: relative;
            padding: 80px 0 60px;
            background: linear-gradient(135deg, rgba(8,145,178,0.08) 0%, rgba(14,165,233,0.04) 50%, transparent 100%);
        }
.contact-method-card {
            background: var(--ymc-bg);
            border-radius: var(--ymc-radius-md);
            padding: 30px 25px;
            box-shadow: var(--ymc-shadow);
            transition: all 0.3s ease;
            height: 100%;
            border: 1px solid rgba(8,145,178,0.08);
        }
.contact-method-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--ymc-shadow-hover);
            border-color: rgba(8,145,178,0.2);
        }
.contact-icon-wrap {
            width: 64px;
            height: 64px;
            border-radius: 20px;
            background: linear-gradient(135deg, rgba(8,145,178,0.12), rgba(14,165,233,0.12));
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 28px;
            color: var(--ymc-primary);
            margin-bottom: 20px;
        }
.contact-email-link {
            color: var(--ymc-primary);
            font-weight: 600;
            text-decoration: none;
            word-break: break-all;
            transition: color 0.2s;
        }
.contact-email-link:hover {
            color: var(--ymc-accent);
            text-decoration: underline;
        }
.contact-info-item {
            padding: 14px 0;
            border-bottom: 1px dashed rgba(8,145,178,0.12);
        }
.contact-info-item:last-child {
            border-bottom: none;
        }
.contact-info-label {
            font-size: 13px;
            font-weight: 600;
            color: var(--ymc-primary);
            text-transform: uppercase;
            letter-spacing: 0.5px;
            margin-bottom: 4px;
        }
.contact-info-value {
            font-weight: 500;
            color: var(--ymc-ink);
        }
.contact-faq-item {
            background: var(--ymc-bg);
            border-radius: var(--ymc-radius-sm);
            padding: 20px 24px;
            margin-bottom: 14px;
            border: 1px solid rgba(8,145,178,0.06);
            box-shadow: 0 4px 12px -4px rgba(8,145,178,0.06);
        }
.contact-faq-question {
            font-weight: 700;
            font-size: 16px;
            color: var(--ymc-primary);
            margin-bottom: 8px;
            display: flex;
            align-items: center;
            gap: 10px;
        }
.contact-faq-question i {
            font-size: 14px;
            color: var(--ymc-accent);
        }
.contact-faq-answer {
            color: var(--ymc-ink);
            font-size: 14px;
            line-height: 1.7;
            padding-left: 24px;
        }
.contact-response-time {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: linear-gradient(135deg, rgba(8,145,178,0.1), rgba(14,165,233,0.08));
            border-radius: 30px;
            padding: 6px 16px;
            font-size: 13px;
            font-weight: 600;
            color: var(--ymc-primary);
            margin-top: 10px;
        }
.contact-form-section {
            background: var(--ymc-bg);
            border-radius: var(--ymc-radius-lg);
            padding: 40px;
            box-shadow: var(--ymc-shadow);
            border: 1px solid rgba(8,145,178,0.08);
        }
.contact-form-label {
            font-weight: 600;
            font-size: 14px;
            color: var(--ymc-ink);
            margin-bottom: 8px;
            display: block;
        }
.contact-form-input {
            width: 100%;
            background: rgba(255,255,255,0.6);
            border: 1.5px solid rgba(8,145,178,0.15);
            border-radius: var(--ymc-radius-sm);
            padding: 12px 16px;
            font-size: 14px;
            color: var(--ymc-ink);
            transition: all 0.2s;
            outline: none;
        }
.contact-form-input:focus {
            border-color: var(--ymc-primary);
            box-shadow: 0 0 0 3px rgba(8,145,178,0.1);
            background: #fff;
        }
.contact-form-input::placeholder {
            color: rgba(8,51,68,0.35);
        }
.contact-form-select {
            appearance: none;
            background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8'%3E%3Cpath fill='%230891b2' d='M6 8L0 0h12z'/%3E%3C/svg%3E");
            background-repeat: no-repeat;
            background-position: right 16px center;
            padding-right: 40px;
        }
.contact-submit-btn {
            background: linear-gradient(135deg, var(--ymc-primary), var(--ymc-accent));
            color: #fff;
            font-weight: 600;
            font-size: 15px;
            border: none;
            border-radius: var(--ymc-radius-sm);
            padding: 14px 36px;
            transition: all 0.3s ease;
            box-shadow: 0 8px 20px -6px rgba(8,145,178,0.3);
        }
.contact-submit-btn:hover {
            transform: translateY(-2px);
            box-shadow: 0 12px 28px -6px rgba(8,145,178,0.4);
            color: #fff;
        }
.contact-hero { padding: 50px 0 40px; }
.contact-form-section { padding: 24px; }

/* --- Bootstrap 组件配色适配(程序自动补,避免白底黑字) --- */
.table { color:#083344 !important; border-color:rgba(0,0,0,.12) !important; --bs-table-bg:transparent !important; --bs-table-color:#083344 !important; }