:root {
  --mk-primary: #38bdf8;
  --mk-accent: #a78bfa;
  --mk-bg: #0f172a;
  --mk-text: #e2e8f0;
  --mk-bg-light: #1e293b;
  --mk-border: #334155;
  --mk-font-mono: 'SF Mono', 'Fira Code', 'Cascadia Code', Consolas, monospace;
}

* { border-radius: 0 !important; }

html { scroll-behavior: smooth; }

body {
  background: var(--mk-bg);
  color: var(--mk-text);
  font-family: 'Inter', sans-serif;
  font-size: 15px;
  line-height: 1.6;
  letter-spacing: 0.01em;
}

h1, h2, h3, h4, h5, h6 {
  font-weight: 900;
  color: #fff;
  letter-spacing: -0.02em;
}

.navbar-mk {
  background: rgba(15, 23, 42, 0.95);
  border-bottom: 3px solid var(--mk-primary);
  padding: 0.8rem 0;
  backdrop-filter: blur(10px);
  z-index: 1030;
}

.navbar-brand-mk {
  font-size: 1.6rem;
  font-weight: 900;
  color: #fff;
  text-transform: uppercase;
  letter-spacing: 1px;
  transition: color 0.2s;
}

.navbar-brand-mk:hover { color: var(--mk-primary); }

.nav-link-mk {
  color: var(--mk-text);
  font-weight: 600;
  margin: 0 0.5rem;
  padding: 0.4rem 0.8rem;
  border: 2px solid transparent;
  transition: all 0.2s;
}

.nav-link-mk:hover, .nav-link-mk.active {
  color: var(--mk-primary);
  border-color: var(--mk-primary);
  background: rgba(56, 189, 248, 0.1);
}

.navbar-toggler {
  border: 2px solid var(--mk-primary);
  color: var(--mk-primary);
  border-radius: 0;
}

.hero-section {
  position: relative;
  min-height: 92vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  background: linear-gradient(135deg, #0f172a 0%, #1a2744 50%, #0f172a 100%);
  overflow: hidden;
  padding: 4rem 0;
  border-bottom: 4px solid var(--mk-accent);
}

.hero-section::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  background: url('{随机图片}') center/cover;
  opacity: 0.15;
  transform: translateY(0);
  animation: parallaxBG 20s ease-in-out infinite alternate;
  z-index: 0;
}

@keyframes parallaxBG {
  0% { transform: translateY(0) scale(1.05); }
  100% { transform: translateY(-30px) scale(1.15); }
}

.hero-content { position: relative; z-index: 1; padding: 0 15px; }

.hero-badge {
  display: inline-block;
  background: var(--mk-accent);
  color: #0f172a;
  font-weight: 800;
  padding: 0.3rem 1rem;
  font-size: 0.8rem;
  letter-spacing: 2px;
  margin-bottom: 1.5rem;
  border: 2px solid #fff;
  box-shadow: 4px 4px 0 rgba(255,255,255,0.2);
}

.hero-title {
  font-size: clamp(2.8rem, 7vw, 5.5rem);
  font-weight: 900;
  line-height: 1.05;
  margin-bottom: 1rem;
  text-shadow: 6px 6px 0 rgba(56,189,248,0.3);
}

.hero-title .accent { color: var(--mk-primary); }

.hero-subtitle {
  font-size: 1.15rem;
  max-width: 640px;
  margin: 0 auto 2rem;
  color: var(--mk-text);
  opacity: 0.9;
  font-weight: 400;
}

.btn-mk {
  display: inline-block;
  padding: 0.9rem 2.2rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 1px;
  border: 3px solid;
  text-decoration: none;
  transition: all 0.2s;
  font-size: 0.95rem;
  margin: 0.5rem;
  box-shadow: 5px 5px 0 rgba(0,0,0,0.3);
}

.btn-mk-primary {
  background: var(--mk-primary);
  border-color: #fff;
  color: #0f172a;
}

.btn-mk-primary:hover {
  background: transparent;
  color: var(--mk-primary);
  transform: translate(-2px, -2px);
  box-shadow: 8px 8px 0 rgba(56,189,248,0.2);
}

.btn-mk-outline {
  background: transparent;
  border-color: var(--mk-accent);
  color: var(--mk-accent);
}

.btn-mk-outline:hover {
  background: var(--mk-accent);
  color: #0f172a;
  transform: translate(-2px, -2px);
  box-shadow: 8px 8px 0 rgba(167,139,250,0.2);
}

.section-mk {
  padding: 5rem 0;
  position: relative;
}

.section-mk-alt { background: #111c35; }

.section-divider-wave {
  position: relative;
  height: 80px;
  margin-top: -40px;
  background: linear-gradient(-45deg, transparent 70%, #0f172a 70%);
}

.section-title-wrap {
  margin-bottom: 3rem;
  position: relative;
}

.section-title {
  font-size: 2.4rem;
  font-weight: 900;
  display: inline-block;
  border-left: 8px solid var(--mk-primary);
  padding-left: 1.2rem;
  margin-bottom: 0.5rem;
}

.section-sub {
  color: var(--mk-text);
  opacity: 0.8;
  max-width: 700px;
}

.accordion-mk .accordion-item {
  background: var(--mk-bg-light);
  border: 2px solid var(--mk-border);
  margin-bottom: 1rem;
  box-shadow: 4px 4px 0 rgba(0,0,0,0.2);
}

.accordion-mk .accordion-button {
  background: var(--mk-bg-light);
  color: #fff;
  font-weight: 700;
  font-size: 1.05rem;
  padding: 1.2rem 1.5rem;
  border: none;
  box-shadow: none;
}

.accordion-mk .accordion-button:not(.collapsed) {
  background: rgba(56,189,248,0.1);
  color: var(--mk-primary);
  border-left: 5px solid var(--mk-primary);
}

.accordion-mk .accordion-button:focus {
  box-shadow: none;
  border-color: var(--mk-primary);
}

.accordion-mk .accordion-body {
  padding: 1.2rem 1.5rem;
  border-top: 1px solid var(--mk-border);
  font-size: 0.95rem;
}

.card-grid-mk {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2rem;
}

.card-mk {
  background: var(--mk-bg-light);
  border: 3px solid var(--mk-border);
  padding: 2rem 1.5rem;
  transition: transform 0.25s, box-shadow 0.25s, border-color 0.25s;
  opacity: 0;
  transform: translateY(40px);
  box-shadow: 8px 8px 0 rgba(0,0,0,0.3);
}

.card-mk.visible {
  opacity: 1;
  transform: translateY(0);
}

.card-mk:hover {
  transform: translateY(-6px) scale(1.01);
  border-color: var(--mk-primary);
  box-shadow: 12px 12px 0 rgba(56,189,248,0.15);
}

.card-icon-mk {
  font-size: 2.5rem;
  color: var(--mk-primary);
  margin-bottom: 1rem;
  display: block;
}

.card-icon-mk.accent { color: var(--mk-accent); }

.card-title-mk {
  font-size: 1.3rem;
  font-weight: 800;
  margin-bottom: 0.8rem;
  color: #fff;
}

.card-text-mk {
  font-size: 0.9rem;
  color: var(--mk-text);
  opacity: 0.85;
}

.feature-list-mk {
  list-style: none;
  padding: 0;
  margin: 0;
}

.feature-list-mk li {
  padding: 0.9rem 0;
  border-bottom: 2px solid var(--mk-border);
  display: flex;
  align-items: center;
  gap: 1rem;
  font-weight: 500;
  transition: padding-left 0.2s;
}

.feature-list-mk li:hover {
  padding-left: 0.5rem;
  border-bottom-color: var(--mk-primary);
}

.feature-list-mk li i {
  color: var(--mk-accent);
  font-size: 1.2rem;
  width: 2rem;
  text-align: center;
}

.mono-data {
  font-family: var(--mk-font-mono);
  color: var(--mk-primary);
  font-size: 1.1rem;
  font-weight: 500;
}

.longform-section {
  border-top: 4px solid var(--mk-primary);
  border-bottom: 4px solid var(--mk-primary);
  background: linear-gradient(180deg, #0f172a 0%, #16203a 100%);
  padding: 5rem 0;
}

.longform-title {
  font-size: 2.2rem;
  font-weight: 900;
  margin-bottom: 1.5rem;
  border-left: 8px solid var(--mk-accent);
  padding-left: 1.2rem;
}

.longform-content p {
  margin-bottom: 1.2rem;
  font-size: 1.02rem;
  line-height: 1.9;
  color: var(--mk-text);
  opacity: 0.92;
}

.longform-content p strong { color: #fff; }

.longform-content p a {
  color: var(--mk-primary);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.faq-section {
  background: #111c35;
  border-top: 3px solid var(--mk-accent);
  padding: 5rem 0;
}

.faq-item-mk {
  background: var(--mk-bg-light);
  border: 2px solid var(--mk-border);
  margin-bottom: 1.2rem;
  padding: 1.5rem;
  box-shadow: 4px 4px 0 rgba(0,0,0,0.2);
  transition: border-color 0.2s;
}

.faq-item-mk:hover { border-color: var(--mk-primary); }

.faq-q {
  font-weight: 800;
  font-size: 1.1rem;
  color: #fff;
  margin-bottom: 0.7rem;
  display: flex;
  align-items: center;
  gap: 0.8rem;
}

.faq-q i { color: var(--mk-accent); }

.faq-a {
  color: var(--mk-text);
  opacity: 0.9;
  font-size: 0.95rem;
  line-height: 1.7;
  padding-left: 2.3rem;
}

.cta-section {
  padding: 5rem 0;
  background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
  border-top: 4px solid var(--mk-primary);
  text-align: center;
}

.cta-title {
  font-size: 2.6rem;
  font-weight: 900;
  margin-bottom: 1rem;
  color: #fff;
}

.cta-title .accent { color: var(--mk-primary); }

.cta-sub {
  font-size: 1.2rem;
  color: var(--mk-text);
  margin-bottom: 2.5rem;
  opacity: 0.9;
}

.cta-buttons { display: flex; flex-wrap: wrap; justify-content: center; gap: 1rem; }

.friend-links {
  background: var(--mk-bg);
  padding: 3rem 0;
  border-top: 2px solid var(--mk-border);
}

.friend-links-title {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 1.2rem;
  color: var(--mk-text);
  text-transform: uppercase;
  letter-spacing: 2px;
}

.friend-links-content {
  color: var(--mk-text);
  opacity: 0.7;
  font-size: 0.95rem;
}

.footer-mk {
  background: #0b1222;
  padding: 2.5rem 0;
  border-top: 3px solid var(--mk-accent);
}

.footer-brand {
  font-size: 1.8rem;
  font-weight: 900;
  color: #fff;
  margin-bottom: 0.5rem;
}

.footer-text {
  color: var(--mk-text);
  opacity: 0.7;
  font-size: 0.9rem;
  line-height: 1.8;
}

.footer-link {
  color: var(--mk-text);
  opacity: 0.7;
  text-decoration: none;
  margin-right: 1.5rem;
  font-size: 0.9rem;
  transition: all 0.2s;
}

.footer-link:hover {
  color: var(--mk-primary);
  opacity: 1;
}

.scroll-animation {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.scroll-animation.visible {
  opacity: 1;
  transform: translateY(0);
}

.delay-1 { transition-delay: 0.15s; }
.delay-2 { transition-delay: 0.3s; }
.delay-3 { transition-delay: 0.45s; }
.delay-4 { transition-delay: 0.6s; }

@media (max-width: 768px) {
  .hero-section { min-height: 70vh; }
  .section-mk { padding: 3.5rem 0; }
  .hero-title { font-size: 2.5rem; }
  .btn-mk { padding: 0.7rem 1.5rem; font-size: 0.85rem; }
  .card-grid-mk { gap: 1.5rem; }
  .navbar-collapse { background: var(--mk-bg); padding: 1rem; border: 2px solid var(--mk-primary); }
}

/* --- 子页面追加 --- */
/* 由于站点样式表已经定义好组件,这里仅补充 about 页特有细节 */
        .about-hero-mk {
            padding: 4.5rem 0 3rem 0;
            background: radial-gradient(circle at 70% 20%, rgba(167, 139, 250, 0.12), transparent 60%);
        }
.about-title-mk {
            font-weight: 800;
            letter-spacing: -0.02em;
        }
.about-section-icon {
            color: var(--mk-primary);
            margin-right: 0.5rem;
        }
.timeline-mk {
            border-left: 2px solid var(--mk-border);
            padding-left: 1.5rem;
            margin-left: 0.5rem;
        }
.timeline-item-mk {
            position: relative;
            margin-bottom: 1.8rem;
        }
.timeline-item-mk::before {
            content: '';
            position: absolute;
            left: -1.8rem;
            top: 0.3rem;
            width: 12px;
            height: 12px;
            border-radius: 50%;
            background: var(--mk-primary);
            box-shadow: 0 0 0 4px rgba(56, 189, 248, 0.2);
        }
.stats-mk {
            background: rgba(30, 41, 59, 0.5);
            border: 1px solid var(--mk-border);
            border-radius: 1.5rem;
            padding: 1.5rem 1rem;
            transition: transform .2s ease, border-color .2s;
        }
.stats-mk:hover {
            border-color: var(--mk-primary);
            transform: translateY(-4px);
        }
.value-card-mk {
            background: var(--mk-bg-light);
            border: 1px solid var(--mk-border);
            border-radius: 1.25rem;
            padding: 1.5rem 1.2rem;
            height: 100%;
            transition: border-color .2s;
        }
.value-card-mk:hover {
            border-color: var(--mk-accent);
        }
.value-icon-mk {
            font-size: 1.8rem;
            color: var(--mk-accent);
            margin-bottom: 1rem;
        }
/* 覆盖 Bootstrap 卡片默认白底,以防万一 */
        .card, .card-body {
            background: transparent;
            color: var(--mk-text);
            border-color: var(--mk-border);
        }

/* --- 子页面追加 --- */
/* 本页专属小样式 */
        .disclaimer-section {
            padding: 4rem 0;
        }
.disclaimer-box {
            background: rgba(30, 41, 59, 0.5);
            border: 1px solid var(--mk-border);
            border-radius: 12px;
            padding: 2rem;
            margin-bottom: 1.5rem;
            transition: border-color 0.3s ease;
        }
.disclaimer-box:hover {
            border-color: var(--mk-primary);
        }
.disclaimer-box h2 {
            font-size: 1.4rem;
            font-weight: 700;
            color: var(--mk-text);
            margin-bottom: 1.2rem;
            display: flex;
            align-items: center;
            gap: 0.75rem;
        }
.disclaimer-box h2 i {
            color: var(--mk-primary);
            font-size: 1.2rem;
        }
.disclaimer-box p, .disclaimer-box li {
            color: rgba(226, 232, 240, 0.85);
            font-size: 0.95rem;
            line-height: 1.8;
        }
.disclaimer-box ul {
            padding-left: 1.5rem;
        }
.disclaimer-box li {
            margin-bottom: 0.5rem;
        }
.update-date {
            color: var(--mk-primary);
            font-family: var(--mk-font-mono);
            font-size: 0.9rem;
        }
.important-note {
            background: rgba(167, 139, 250, 0.1);
            border-left: 4px solid var(--mk-accent);
            padding: 1rem 1.5rem;
            border-radius: 0 8px 8px 0;
            margin: 1.5rem 0;
        }
.important-note p {
            margin-bottom: 0.5rem;
        }
.disclaimer-box {
                padding: 1.5rem;
            }

/* --- 子页面追加 --- */
.privacy-content {
            padding: 60px 0;
        }
.privacy-section {
            background: var(--mk-bg-light);
            border: 1px solid var(--mk-border);
            border-radius: 12px;
            padding: 30px;
            margin-bottom: 30px;
        }
.privacy-section h2 {
            color: var(--mk-primary);
            font-size: 1.5rem;
            font-weight: 700;
            margin-bottom: 20px;
            display: flex;
            align-items: center;
            gap: 12px;
        }
.privacy-section h2 i {
            font-size: 1.3rem;
            color: var(--mk-accent);
        }
.privacy-section p {
            color: var(--mk-text);
            line-height: 1.8;
            margin-bottom: 15px;
        }
.privacy-section ul {
            color: var(--mk-text);
            line-height: 1.8;
            padding-left: 20px;
        }
.privacy-section li {
            margin-bottom: 8px;
        }
.privacy-date {
            color: var(--mk-accent);
            font-family: var(--mk-font-mono);
            font-size: 0.9rem;
            margin-bottom: 30px;
        }
.privacy-intro {
            color: var(--mk-text);
            font-size: 1.1rem;
            line-height: 1.8;
            margin-bottom: 40px;
            padding: 20px 30px;
            background: rgba(56, 189, 248, 0.08);
            border-left: 4px solid var(--mk-primary);
            border-radius: 0 8px 8px 0;
        }
.table-of-contents {
            background: var(--mk-bg-light);
            border: 1px solid var(--mk-border);
            border-radius: 12px;
            padding: 20px 30px;
            margin-bottom: 40px;
        }
.table-of-contents h3 {
            color: var(--mk-primary);
            font-size: 1.2rem;
            margin-bottom: 15px;
        }
.table-of-contents a {
            color: var(--mk-text);
            text-decoration: none;
            display: block;
            padding: 6px 0;
            transition: color 0.3s;
        }
.table-of-contents a:hover {
            color: var(--mk-primary);
        }
.privacy-footer {
            margin-top: 40px;
            padding: 20px;
            text-align: center;
            color: var(--mk-text);
            opacity: 0.8;
            font-size: 0.9rem;
        }
.privacy-content {
                padding: 40px 0;
            }
.privacy-section {
                padding: 20px;
            }
.privacy-intro {
                font-size: 1rem;
                padding: 15px 20px;
            }

/* --- 子页面追加 --- */
/* 排行榜页专属：确保Bootstrap组件与站点深色风格融合 */
    .list-group-item, .card, .card-body, .accordion-item, .accordion-button {
      background: var(--mk-bg-light) !important;
      color: var(--mk-text) !important;
      border-color: var(--mk-border) !important;
    }
.list-group-item:hover {
      background: rgba(56, 189, 248, 0.08) !important;
      border-color: var(--mk-primary) !important;
    }
.accordion-button::after {
      filter: invert(1) hue-rotate(180deg);
    }
/* 榜单徽章/序号 */
    .rank-badge {
      font-family: var(--mk-font-mono);
      font-size: 1.2rem;
      font-weight: 700;
      color: var(--mk-accent);
      background: rgba(167, 139, 250, 0.12);
      border: 1px solid rgba(167, 139, 250, 0.3);
      padding: 0.2rem 0.7rem;
      border-radius: 30px;
      display: inline-block;
    }
.rank-table {
      background: transparent;
    }
.rank-table td, .rank-table th {
      background: transparent !important;
      color: var(--mk-text);
      border-color: var(--mk-border) !important;
      padding: 0.75rem 0.5rem;
    }
.rank-table tr:hover td {
      background: rgba(56, 189, 248, 0.04) !important;
    }
.rank-progress {
      background: rgba(56, 189, 248, 0.15);
      border-radius: 20px;
      height: 6px;
      overflow: hidden;
    }
.rank-progress-bar {
      height: 100%;
      background: linear-gradient(90deg, var(--mk-primary), var(--mk-accent));
      border-radius: 20px;
    }
.rank-tag {
      color: var(--mk-primary);
      font-family: var(--mk-font-mono);
      font-size: 0.75rem;
      border: 1px solid var(--mk-border);
      padding: 0.2rem 0.6rem;
      border-radius: 20px;
      white-space: nowrap;
    }
.rank-section-title {
      border-left: 4px solid var(--mk-primary);
      padding-left: 1rem;
      margin-top: 2rem;
      margin-bottom: 1.2rem;
    }

/* --- Bootstrap 组件配色适配(程序自动补,避免白底黑字) --- */
.table { color:#e2e8f0 !important; border-color:rgba(255,255,255,.12) !important; --bs-table-bg:transparent !important; --bs-table-color:#e2e8f0 !important; }