:root {
      --primary: #2563eb;
      --accent: #06b6d4;
      --bg: #f8fafc;
      --text: #0f172a;
      --card-radius: 18px;
      --pill-radius: 50rem;
      --shadow: 0 12px 30px rgba(15, 23, 42, 0.06);
      --shadow-hover: 0 20px 40px rgba(37, 99, 235, 0.12);
      --nav-bg: rgba(255,255,255,0.75);
    }

    * { box-sizing: border-box; }

    body {
      font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
      background: var(--bg);
      color: var(--text);
      line-height: 1.7;
      scroll-behavior: smooth;
    }

    /* 手写/圆体标题 */
    h1, h2, h3, .font-display {
      font-weight: 700;
      letter-spacing: -0.01em;
      font-family: 'Inter', 'Segoe UI', system-ui, sans-serif; /* 干净现代 */
      text-shadow: 0 1px 2px rgba(0,0,0,0.02);
    }

    /* 胶囊圆角 + 按钮全圆 */
    .btn {
      border-radius: var(--pill-radius);
      padding: 0.65rem 1.6rem;
      font-weight: 600;
      border: none;
      transition: all 0.2s ease;
      position: relative;
      overflow: hidden;
      z-index: 1;
    }

    .btn-primary {
      background: var(--primary);
      color: white;
      box-shadow: 0 8px 20px rgba(37,99,235,0.25);
    }

    .btn-outline-light {
      border: 2px solid rgba(255,255,255,0.7);
      color: white;
      background: transparent;
    }

    .btn-outline-light:hover {
      background: rgba(255,255,255,0.15);
      color: white;
    }

    /* 光泽扫过效果 */
    .btn-gloss::after {
      content: "";
      position: absolute;
      top: 0;
      left: -100%;
      width: 60%;
      height: 100%;
      background: linear-gradient(120deg, transparent, rgba(255,255,255,0.5), transparent);
      transform: skewX(-20deg);
      transition: left 0.4s ease;
      z-index: 0;
    }

    .btn-gloss:hover::after {
      left: 130%;
    }

    .btn-gloss:hover {
      transform: translateY(-2px);
      box-shadow: 0 12px 28px rgba(6,182,212,0.3);
    }

    /* 卡片网格 */
    .card-custom {
      border-radius: var(--card-radius);
      background: white;
      box-shadow: var(--shadow);
      border: none;
      padding: 1.8rem 1.2rem;
      transition: transform 0.15s ease, box-shadow 0.2s ease;
      height: 100%;
    }

    .card-custom:hover {
      box-shadow: var(--shadow-hover);
      transform: translateY(-6px);
    }

    .card-custom .icon-badge {
      width: 52px;
      height: 52px;
      border-radius: 50%;
      background: linear-gradient(135deg, var(--primary), var(--accent));
      display: inline-flex;
      align-items: center;
      justify-content: center;
      color: white;
      font-size: 1.5rem;
      margin-bottom: 1.2rem;
    }

    /* Hero 背景压暗 */
    .hero-section {
      background: 
        linear-gradient( rgba(15, 23, 42, 0.65), rgba(15, 23, 42, 0.7) ),
        url('{随机图片}') center/cover no-repeat;
      background-size: cover;
      padding: 6rem 0 6.5rem;
      color: white;
      border-radius: 0 0 2.5rem 2.5rem;
      box-shadow: 0 15px 40px rgba(0,0,0,0.08);
      margin-bottom: 1rem;
    }

    .hero-title {
      font-size: 3.3rem;
      font-weight: 800;
      letter-spacing: -0.02em;
    }

    /* 导航 */
    .navbar-custom {
      background: var(--nav-bg);
      backdrop-filter: blur(14px);
      -webkit-backdrop-filter: blur(14px);
      transition: background 0.3s ease, box-shadow 0.2s ease;
      padding: 0.8rem 0;
      border-bottom: 1px solid rgba(37,99,235,0.08);
    }

    .navbar-custom.scrolled {
      background: rgba(255, 255, 255, 0.95);
      box-shadow: 0 8px 30px rgba(15, 23, 42, 0.08);
    }

    .navbar-brand {
      font-weight: 800;
      font-size: 1.5rem;
      color: var(--text) !important;
      display: flex;
      align-items: center;
      gap: 8px;
    }

    .navbar-brand i {
      color: var(--primary);
      font-size: 1.7rem;
    }

    .nav-link-custom {
      font-weight: 500;
      color: var(--text) !important;
      padding: 0.5rem 1rem !important;
      border-radius: 50rem;
      transition: background 0.15s ease, color 0.15s ease;
    }

    .nav-link-custom:hover {
      background: rgba(37,99,235,0.08);
      color: var(--primary) !important;
    }

    /* 返回顶部按钮 */
    #backToTop {
      position: fixed;
      bottom: 2rem;
      right: 2rem;
      width: 48px;
      height: 48px;
      border-radius: 50%;
      background: var(--primary);
      color: white;
      border: none;
      box-shadow: 0 8px 20px rgba(37,99,235,0.35);
      opacity: 0;
      visibility: hidden;
      transition: 0.3s;
      z-index: 999;
      font-size: 1.2rem;
      display: flex;
      align-items: center;
      justify-content: center;
    }

    #backToTop.show {
      opacity: 1;
      visibility: visible;
      cursor: pointer;
    }

    /* 手风琴定制 */
    .accordion-button:not(.collapsed) {
      background-color: #eff6ff;
      color: var(--primary);
      box-shadow: none;
      border-radius: 50rem !important;
    }

    .accordion-button {
      border-radius: 50rem !important;
      background-color: white;
      border: 1px solid #e2e8f0;
      padding: 1rem 1.4rem;
      font-weight: 600;
    }

    .accordion-item {
      border: none;
      margin-bottom: 0.7rem;
      background: transparent;
    }

    .accordion-body {
      background: white;
      border-radius: 20px;
      padding: 1.2rem 1.5rem;
      border: 1px solid #f1f5f9;
      margin-top: 0.3rem;
      box-shadow: 0 4px 12px rgba(0,0,0,0.02);
    }

    /* 特色区块 */
    .feature-grid .card-custom {
      text-align: center;
      padding: 2rem 1.5rem;
    }

    /* 区块标题 */
    .section-title {
      font-size: 2.1rem;
      font-weight: 700;
      margin-bottom: 1.2rem;
      position: relative;
      display: inline-block;
    }

    .section-title::after {
      content: '';
      position: absolute;
      bottom: -12px;
      left: 0;
      width: 70px;
      height: 4px;
      border-radius: 10px;
      background: linear-gradient(90deg, var(--primary), var(--accent));
    }

    .faq-wrap {
      max-width: 900px;
      margin: 0 auto;
    }

    footer {
      background: white;
      border-top: 1px solid #e2e8f0;
      color: #475569;
      padding: 3rem 0 2rem;
    }

    .footer-link {
      color: #475569;
      text-decoration: none;
      margin-right: 2rem;
    }

    .footer-link:hover {
      color: var(--primary);
    }

    /* 友情链接区 */
    .friend-links {
      background: #ffffff;
      border-radius: 30px;
      padding: 1.5rem 2rem;
      box-shadow: var(--shadow);
      margin-top: 2rem;
    }

    /* 导航折叠样式 */
    @media (max-width: 992px) {
      .navbar-collapse {
        background: white;
        border-radius: 20px;
        padding: 1rem;
        margin-top: 0.5rem;
        box-shadow: 0 8px 20px rgba(0,0,0,0.05);
      }
    }

    .text-accent { color: var(--accent); }
    .bg-primary-soft { background: rgba(37,99,235,0.03); }

/* --- 子页面追加 --- */
.rank-page-hero {
            background: linear-gradient(135deg, #2563eb 0%, #06b6d4 100%);
            border-radius: 24px;
            padding: 3.5rem 2.5rem;
            color: #fff;
            margin: 2rem 0 3rem;
            position: relative;
            overflow: hidden;
        }
.rank-page-hero::before {
            content: '';
            position: absolute;
            top: -50%;
            right: -20%;
            width: 400px;
            height: 400px;
            background: rgba(255,255,255,0.1);
            border-radius: 50%;
        }
.rank-page-hero h1 {
            font-size: 2.4rem;
            font-weight: 800;
            position: relative;
            z-index: 1;
        }
.rank-page-hero p {
            font-size: 1.1rem;
            opacity: 0.95;
            position: relative;
            z-index: 1;
            max-width: 600px;
        }
.rank-tabs {
            display: flex;
            gap: 0.75rem;
            flex-wrap: wrap;
            margin-bottom: 2.5rem;
        }
.rank-tab-btn {
            padding: 0.6rem 1.5rem;
            border-radius: 50rem;
            border: 1px solid #e2e8f0;
            background: #fff;
            color: var(--text);
            font-weight: 600;
            font-size: 0.9rem;
            cursor: pointer;
            transition: all 0.3s;
        }
.rank-tab-btn:hover, .rank-tab-btn.active {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
            box-shadow: 0 8px 20px rgba(37, 99, 235, 0.2);
        }
.rank-card {
            background: #fff;
            border-radius: var(--card-radius);
            padding: 1.5rem;
            box-shadow: var(--shadow);
            transition: all 0.3s;
            height: 100%;
            border: 1px solid #f1f5f9;
        }
.rank-card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-4px);
        }
.rank-number {
            font-size: 2rem;
            font-weight: 900;
            color: var(--primary);
            line-height: 1;
            margin-right: 1rem;
            min-width: 3rem;
        }
.rank-number.gold { color: #f59e0b; }
.rank-number.silver { color: #94a3b8; }
.rank-number.bronze { color: #d97706; }
.rank-info h3 {
            font-size: 1.15rem;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 0.35rem;
        }
.rank-tags {
            display: flex;
            gap: 0.5rem;
            flex-wrap: wrap;
            margin: 0.5rem 0;
        }
.rank-tag {
            font-size: 0.75rem;
            padding: 0.2rem 0.7rem;
            border-radius: 50rem;
            background: rgba(37, 99, 235, 0.08);
            color: var(--primary);
            font-weight: 500;
        }
.rank-stats {
            display: flex;
            gap: 1rem;
            font-size: 0.85rem;
            color: #64748b;
            margin-top: 0.5rem;
        }
.rank-stats i {
            color: var(--primary);
            margin-right: 0.25rem;
        }
.rank-list-item {
            display: flex;
            align-items: flex-start;
            padding: 1.25rem;
            background: #fff;
            border-radius: var(--card-radius);
            box-shadow: var(--shadow);
            margin-bottom: 1rem;
            border: 1px solid #f1f5f9;
            transition: all 0.3s;
        }
.rank-list-item:hover {
            box-shadow: var(--shadow-hover);
            transform: translateX(4px);
        }
.section-subtitle {
            color: var(--primary);
            font-weight: 600;
            font-size: 0.95rem;
            text-transform: uppercase;
            letter-spacing: 0.05em;
            margin-bottom: 0.5rem;
        }
.rank-cat-title {
            font-size: 1.6rem;
            font-weight: 800;
            color: var(--text);
            margin-bottom: 1.5rem;
            position: relative;
            padding-bottom: 0.75rem;
        }
.rank-cat-title::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 60px;
            height: 3px;
            background: linear-gradient(90deg, var(--primary), var(--accent));
            border-radius: 3px;
        }
.badge-hot {
            background: linear-gradient(135deg, #ef4444, #f97316);
            color: #fff;
            padding: 0.25rem 0.75rem;
            border-radius: 50rem;
            font-size: 0.75rem;
            font-weight: 700;
            display: inline-block;
        }
.update-info {
            background: rgba(6, 182, 212, 0.1);
            border-left: 4px solid var(--accent);
            padding: 1rem 1.5rem;
            border-radius: 0 12px 12px 0;
            margin: 2rem 0;
        }
.rank-page-hero { padding: 2rem 1.5rem; }
.rank-page-hero h1 { font-size: 1.8rem; }
.rank-list-item { flex-direction: column; }
.rank-number { margin-bottom: 0.5rem; }

/* --- 子页面追加 --- */
.feedback-hero {
            background: linear-gradient(135deg, var(--bg) 0%, #e8f0fe 100%);
            padding: 100px 0 60px;
            border-bottom: 1px solid rgba(37,99,235,0.1);
        }
.feedback-hero h1 {
            font-weight: 800;
            color: var(--text);
            font-size: 2.8rem;
            margin-bottom: 16px;
        }
.feedback-hero .lead {
            color: #475569;
            max-width: 680px;
            margin: 0 auto;
            font-size: 1.1rem;
        }
.feedback-card {
            background: #ffffff;
            border-radius: var(--card-radius);
            box-shadow: var(--shadow);
            padding: 32px;
            margin-bottom: 30px;
            border: 1px solid rgba(15,23,42,0.05);
            transition: box-shadow 0.3s ease;
        }
.feedback-card:hover {
            box-shadow: var(--shadow-hover);
        }
.feedback-card h2 {
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 16px;
            display: flex;
            align-items: center;
            gap: 10px;
        }
.feedback-card h2 i {
            color: var(--primary);
        }
.feedback-card h3 {
            font-size: 1.15rem;
            font-weight: 600;
            color: var(--text);
            margin: 20px 0 10px;
        }
.feedback-card p {
            color: #475569;
            line-height: 1.7;
            margin-bottom: 12px;
        }
.feedback-form {
            background: #ffffff;
            border-radius: var(--card-radius);
            box-shadow: var(--shadow);
            padding: 36px;
            border: 1px solid rgba(15,23,42,0.05);
        }
.feedback-form label {
            font-weight: 600;
            color: var(--text);
            margin-bottom: 8px;
            display: block;
        }
.feedback-form .form-control {
            background: #f8fafc;
            border: 1px solid #e2e8f0;
            border-radius: 12px;
            padding: 12px 16px;
            color: var(--text);
            font-size: 0.95rem;
            transition: border-color 0.2s, box-shadow 0.2s;
        }
.feedback-form .form-control:focus {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(37,99,235,0.1);
            background: #ffffff;
            outline: none;
        }
.feedback-form .form-control::placeholder {
            color: #94a3b8;
        }
.feedback-form .form-select {
            background: #f8fafc;
            border: 1px solid #e2e8f0;
            border-radius: 12px;
            padding: 12px 16px;
            color: var(--text);
            font-size: 0.95rem;
        }
.feedback-form .form-select:focus {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(37,99,235,0.1);
            outline: none;
        }
.feedback-form textarea.form-control {
            min-height: 140px;
            resize: vertical;
        }
.btn-submit {
            background: var(--primary);
            color: #ffffff;
            border: none;
            border-radius: 50rem;
            padding: 12px 36px;
            font-weight: 600;
            font-size: 1rem;
            transition: all 0.3s;
            box-shadow: 0 4px 12px rgba(37,99,235,0.2);
        }
.btn-submit:hover {
            background: #1d4ed8;
            transform: translateY(-2px);
            box-shadow: 0 8px 20px rgba(37,99,235,0.3);
            color: #ffffff;
        }
.feedback-tips {
            background: #f0f4ff;
            border-radius: 14px;
            padding: 20px 24px;
            border-left: 4px solid var(--primary);
            margin: 24px 0;
        }
.feedback-tips p {
            margin-bottom: 6px;
            color: #334155;
            font-size: 0.95rem;
        }
.feedback-tips p i {
            color: var(--primary);
            margin-right: 8px;
        }
.response-time {
            background: #eefdf6;
            border-radius: 14px;
            padding: 18px 24px;
            border-left: 4px solid #10b981;
            margin: 24px 0;
        }
.response-time p {
            margin-bottom: 0;
            color: #334155;
            font-size: 0.95rem;
        }
.response-time p i {
            color: #10b981;
            margin-right: 8px;
        }
.emoji-row {
            display: flex;
            gap: 12px;
            flex-wrap: wrap;
            margin-top: 8px;
        }
.emoji-option {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: #f1f5f9;
            border: 2px solid transparent;
            border-radius: 50rem;
            padding: 8px 16px;
            cursor: pointer;
            transition: all 0.2s;
            font-size: 0.9rem;
            font-weight: 500;
            color: #475569;
        }
.emoji-option:hover {
            border-color: var(--primary);
            background: #ffffff;
            color: var(--primary);
        }
.emoji-option input[type="radio"] {
            display: none;
        }
.emoji-option:has(input:checked) {
            border-color: var(--primary);
            background: #eff6ff;
            color: var(--primary);
            font-weight: 600;
        }
.feedback-hero h1 {
                font-size: 2rem;
            }
.feedback-form {
                padding: 24px;
            }
.feedback-card {
                padding: 24px;
            }

/* --- 子页面追加 --- */
/* 确保Bootstrap组件被覆盖成本站配色——本站页面尽量避免使用Bootstrap组件，但以防万一 */
    .card, .card-body, .card-header, .card-footer, .form-control, .list-group-item, .accordion-item, .accordion-button, .accordion-body {
      background-color: var(--bg) !important;
      color: var(--text) !important;
      border-color: rgba(15, 23, 42, 0.1) !important;
    }
/* 图片圆角及占位效果 */
    .story-thumb {
      border-radius: 16px;
      object-fit: cover;
      box-shadow: var(--shadow);
      transition: transform 0.2s;
    }
.story-thumb:hover { transform: scale(1.02); }
.feature-icon { color: var(--primary); }
.about-section { scroll-margin-top: 90px; }
/* 香蕉黄点缀 */
    .text-banana { color: #fbbf24; }
.bg-banana-soft { background-color: rgba(251, 191, 36, 0.08); }

/* --- 子页面追加 --- */
/* 本页专属补充样式 */
    .privacy-hero {
      background: linear-gradient(135deg, #2563eb 0%, #06b6d4 100%);
      border-radius: 24px;
      padding: 3.5rem 2.5rem;
      color: #fff;
      margin: 2rem 0 3rem;
      position: relative;
      overflow: hidden;
    }
.privacy-hero::before {
      content: '';
      position: absolute;
      top: -50%;
      right: -20%;
      width: 400px;
      height: 400px;
      background: rgba(255,255,255,0.1);
      border-radius: 50%;
    }
.privacy-hero h1 {
      font-size: 2.4rem;
      font-weight: 800;
      position: relative;
      z-index: 1;
    }
.privacy-hero p {
      font-size: 1.1rem;
      opacity: 0.95;
      max-width: 600px;
      position: relative;
      z-index: 1;
    }
.privacy-section {
      background: #ffffff;
      border-radius: var(--card-radius);
      padding: 2rem 2.5rem;
      box-shadow: var(--shadow);
      margin-bottom: 2rem;
      border-left: 4px solid var(--primary);
      transition: transform 0.3s ease, box-shadow 0.3s ease;
    }
.privacy-section:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-hover);
    }
.privacy-section h2 {
      color: var(--text);
      font-weight: 700;
      font-size: 1.5rem;
      margin-bottom: 1.2rem;
      display: flex;
      align-items: center;
      gap: 0.8rem;
    }
.privacy-section h2 i {
      color: var(--primary);
      font-size: 1.3rem;
    }
.privacy-section p {
      color: #334155;
      line-height: 1.8;
      margin-bottom: 1rem;
    }
.privacy-section ul {
      padding-left: 1.5rem;
      color: #334155;
      line-height: 1.8;
    }
.privacy-section ul li {
      margin-bottom: 0.5rem;
    }
.highlight-box {
      background: var(--bg);
      border-radius: 12px;
      padding: 1.2rem 1.5rem;
      margin: 1rem 0;
      border: 1px solid rgba(37, 99, 235, 0.15);
    }
.highlight-box i {
      color: var(--primary);
      margin-right: 0.5rem;
    }
.last-updated {
      text-align: center;
      color: #64748b;
      font-size: 0.9rem;
      margin-top: 2rem;
      padding: 1rem;
    }
.privacy-hero {
        padding: 2.5rem 1.5rem;
        border-radius: 18px;
      }
.privacy-hero h1 {
        font-size: 1.8rem;
      }
.privacy-section {
        padding: 1.5rem;
      }

/* --- Bootstrap 组件配色适配(程序自动补,避免白底黑字) --- */
.accordion-header { background:transparent !important; }