:root {
  --primary: #38bdf8;
  --accent: #a78bfa;
  --bg: #0f172a;
  --text: #e2e8f0;
  --text-dim: #94a3b8;
  --border: #1e293b;
  --border-light: #334155;
  --card-bg: #1e293b;
  --hover-shadow: 0 12px 32px rgba(56, 189, 248, 0.18);
}

* {
  border-radius: 0 !important;
}

body {
  background-color: var(--bg);
  color: var(--text);
  font-family: 'Inter', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  overflow-x: hidden;
}

/* 噪点纹理 */
body::before {
  content: '';
  position: fixed;
  top: 0; left: 0;
  width: 100%; height: 100%;
  pointer-events: none;
  z-index: 9999;
  opacity: 0.04;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

/* 滚动进度条 */
#scroll-progress {
  position: fixed;
  top: 0; left: 0;
  height: 3px;
  width: 0%;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  z-index: 9998;
  transition: width 0.08s ease-out;
}

/* 侧栏 */
.sidebar {
  position: fixed;
  left: 0;
  top: 0;
  width: 220px;
  height: 100vh;
  background: var(--card-bg);
  border-right: 3px solid var(--border-light);
  z-index: 1000;
  display: flex;
  flex-direction: column;
  padding: 24px 16px;
}

.sidebar-brand {
  font-family: 'Inter', sans-serif;
  font-weight: 900;
  font-size: 26px;
  color: var(--primary);
  text-decoration: none;
  margin-bottom: 40px;
  display: block;
  letter-spacing: 2px;
}

.sidebar-brand i {
  color: var(--accent);
  margin-right: 6px;
}

.sidebar-nav {
  list-style: none;
  padding: 0;
  margin: 0;
  flex: 1;
}

.sidebar-nav li {
  margin-bottom: 8px;
}

.sidebar-nav a {
  display: block;
  padding: 12px 16px;
  color: var(--text);
  text-decoration: none;
  font-weight: 500;
  font-size: 15px;
  border-left: 3px solid transparent;
  transition: all 0.25s;
}

.sidebar-nav a:hover {
  background: rgba(56, 189, 248, 0.1);
  border-left-color: var(--primary);
  color: var(--primary);
}

.sidebar-nav a.active {
  background: rgba(167, 139, 250, 0.12);
  border-left-color: var(--accent);
  color: var(--accent);
}

.sidebar-footer {
  padding-top: 16px;
  border-top: 2px solid var(--border);
  font-size: 12px;
  color: var(--text-dim);
  text-align: center;
}

/* 主内容区 */
.main-content {
  margin-left: 220px;
  padding: 0;
  min-height: 100vh;
}

/* Hero */
.hero {
  position: relative;
  padding: 100px 48px 80px;
  border-bottom: 4px solid var(--border-light);
  background: linear-gradient(135deg, rgba(56, 189, 248, 0.08), rgba(167, 139, 250, 0.06));
  overflow: hidden;
}

.hero-title {
  font-size: 56px;
  font-weight: 900;
  letter-spacing: 4px;
  color: var(--text);
  margin-bottom: 8px;
  font-family: 'Inter', 'PingFang SC', sans-serif;
  min-height: 1.2em;
}

.hero-title .typing {
  color: var(--primary);
  border-right: 3px solid var(--primary);
  padding-right: 4px;
  animation: blink 0.8s step-end infinite;
}

@keyframes blink {
  50% { border-color: transparent; }
}

.hero-sub {
  font-size: 18px;
  color: var(--text-dim);
  margin-top: 16px;
  max-width: 600px;
  line-height: 1.8;
}

.hero-tag {
  display: inline-block;
  margin-top: 20px;
  padding: 8px 20px;
  background: var(--primary);
  color: var(--bg);
  font-weight: 700;
  font-size: 14px;
  letter-spacing: 2px;
}

/* 区块通用 */
.section {
  padding: 64px 48px;
  border-bottom: 3px solid var(--border);
}

.section-title {
  font-size: 30px;
  font-weight: 800;
  margin-bottom: 8px;
  letter-spacing: 1px;
  font-family: 'Inter', 'PingFang SC', sans-serif;
}

.section-sub {
  color: var(--text-dim);
  margin-bottom: 40px;
  font-size: 15px;
}

/* 数据统计 */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.stat-card {
  background: var(--card-bg);
  border: 3px solid var(--border-light);
  padding: 28px 20px;
  text-align: center;
  transition: all 0.3s;
  cursor: default;
}

.stat-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--hover-shadow);
  border-color: var(--primary);
}

.stat-card i {
  font-size: 36px;
  color: var(--accent);
  margin-bottom: 12px;
}

.stat-card .stat-num {
  font-size: 40px;
  font-weight: 900;
  color: var(--primary);
  font-family: 'Inter', sans-serif;
}

.stat-card .stat-label {
  font-size: 14px;
  color: var(--text-dim);
  margin-top: 6px;
}

/* 手风琴说明 */
.accordion-custom {
  background: var(--card-bg);
  border: 3px solid var(--border-light);
}

.accordion-custom .accordion-item {
  background: transparent;
  border-bottom: 2px solid var(--border);
}

.accordion-custom .accordion-item:last-child {
  border-bottom: none;
}

.accordion-custom .accordion-button {
  background: transparent;
  color: var(--text);
  font-weight: 700;
  font-size: 16px;
  padding: 20px 24px;
  box-shadow: none;
  border-radius: 0;
  font-family: 'Inter', 'PingFang SC', sans-serif;
}

.accordion-custom .accordion-button:not(.collapsed) {
  background: rgba(56, 189, 248, 0.08);
  color: var(--primary);
}

.accordion-custom .accordion-button:focus {
  box-shadow: none;
}

.accordion-custom .accordion-button::after {
  filter: invert(0.7);
}

.accordion-custom .accordion-body {
  color: var(--text);
  font-size: 15px;
  line-height: 1.8;
  padding: 8px 24px 24px;
}

/* 特色卡片 */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
}

.feature-card {
  background: var(--card-bg);
  border: 3px solid var(--border-light);
  padding: 32px;
  transition: all 0.3s;
}

.feature-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--hover-shadow);
  border-color: var(--accent);
}

.feature-card .feature-icon {
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 2px solid var(--primary);
  margin-bottom: 20px;
  color: var(--primary);
  font-size: 22px;
}

.feature-card .feature-title {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 10px;
  color: var(--text);
}

.feature-card .feature-desc {
  font-size: 14px;
  color: var(--text-dim);
  line-height: 1.7;
}

/* FAQ */
.faq-list {
  max-width: 800px;
}

.faq-item {
  background: var(--card-bg);
  border: 3px solid var(--border-light);
  margin-bottom: 20px;
  padding: 28px 32px;
  transition: all 0.3s;
}

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

.faq-item .faq-q {
  font-weight: 700;
  font-size: 18px;
  color: var(--primary);
  margin-bottom: 12px;
  display: flex;
  align-items: center;
}

.faq-item .faq-q i {
  margin-right: 12px;
  color: var(--accent);
  font-size: 20px;
}

.faq-item .faq-a {
  font-size: 15px;
  line-height: 1.8;
  color: var(--text);
}

/* CTA */
.cta-section {
  padding: 80px 48px;
  text-align: center;
  background: linear-gradient(135deg, rgba(56, 189, 248, 0.1), rgba(167, 139, 250, 0.08));
}

.cta-section .cta-title {
  font-size: 40px;
  font-weight: 900;
  margin-bottom: 16px;
}

.cta-section .cta-desc {
  font-size: 17px;
  color: var(--text-dim);
  max-width: 500px;
  margin: 0 auto 36px;
  line-height: 1.8;
}

.btn-custom {
  display: inline-block;
  padding: 16px 48px;
  background: var(--primary);
  color: var(--bg);
  font-weight: 800;
  font-size: 16px;
  text-decoration: none;
  border: 3px solid var(--primary);
  transition: all 0.3s;
  letter-spacing: 2px;
}

.btn-custom:hover {
  background: transparent;
  color: var(--primary);
}

.btn-secondary-custom {
  display: inline-block;
  padding: 16px 40px;
  background: transparent;
  color: var(--accent);
  font-weight: 800;
  font-size: 16px;
  text-decoration: none;
  border: 3px solid var(--accent);
  transition: all 0.3s;
  margin-left: 16px;
  letter-spacing: 2px;
}

.btn-secondary-custom:hover {
  background: var(--accent);
  color: var(--bg);
}

/* 友情链接 */
.friend-links {
  padding: 48px;
  border-bottom: 3px solid var(--border);
  background: var(--card-bg);
}

.friend-links .section-title {
  font-size: 24px;
}

/* 页脚 */
.footer {
  padding: 48px;
  text-align: center;
  color: var(--text-dim);
  font-size: 14px;
  line-height: 2;
}

.footer a {
  color: var(--primary);
  text-decoration: none;
  margin: 0 10px;
}

.footer a:hover {
  color: var(--accent);
  text-decoration: underline;
}

/* 滚动淡入 */
.fade-up {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.fade-up.visible {
  opacity: 1;
  transform: translateY(0);
}

/* 响应式 */
@media (max-width: 992px) {
  .sidebar {
    display: none;
  }
  .main-content {
    margin-left: 0;
  }
  .hero {
    padding: 60px 24px 50px;
  }
  .hero-title {
    font-size: 38px;
  }
  .section {
    padding: 48px 24px;
  }
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .feature-grid {
    grid-template-columns: 1fr;
  }
  .btn-secondary-custom {
    margin-left: 0;
    margin-top: 12px;
  }
  .cta-section {
    padding: 60px 24px;
  }
}

@media (max-width: 576px) {
  .hero-title {
    font-size: 28px;
  }
  .hero {
    padding: 40px 16px 40px;
  }
  .section {
    padding: 36px 16px;
  }
  .stats-grid {
    grid-template-columns: 1fr;
  }
}

/* --- 子页面追加 --- */
/* 本页专属小范围样式,补足站点样式表中未覆盖的部分 */
        .about-hero {
            position: relative;
            padding: 5rem 0 3.5rem;
            text-align: center;
            background: radial-gradient(ellipse at top, rgba(56, 189, 248, 0.08) 0%, transparent 55%);
        }
.about-hero .hero-badge {
            display: inline-block;
            padding: 0.3rem 1rem;
            border-radius: 999px;
            border: 1px solid var(--border-light);
            color: var(--accent);
            font-size: 0.8rem;
            letter-spacing: 0.08em;
            margin-bottom: 1.2rem;
        }
.about-hero .hero-title {
            font-size: clamp(2rem, 5vw, 3.2rem);
            font-weight: 800;
            color: var(--text);
            line-height: 1.2;
            margin-bottom: 1rem;
        }
.about-hero .hero-title span {
            color: var(--primary);
        }
.about-hero .hero-sub {
            color: var(--text-dim);
            max-width: 640px;
            margin: 0 auto;
            font-size: 1.05rem;
            line-height: 1.8;
        }
.about-section {
            padding: 3.5rem 0;
        }
.about-section + .about-section {
            border-top: 1px solid var(--border);
        }
.about-grid-2 {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 2.5rem;
            align-items: center;
        }
.about-grid-2 .about-img {
            border-radius: 16px;
            overflow: hidden;
            border: 1px solid var(--border-light);
            box-shadow: var(--hover-shadow);
        }
.about-grid-2 .about-img img {
            width: 100%;
            display: block;
        }
.about-text h2 {
            font-size: 1.6rem;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 1rem;
            line-height: 1.3;
        }
.about-text h2 i {
            color: var(--primary);
            margin-right: 0.5rem;
        }
.about-text p {
            color: var(--text-dim);
            line-height: 1.85;
            margin-bottom: 1rem;
        }
.about-text p strong {
            color: var(--text);
        }
.about-text .feature-tag {
            display: flex;
            flex-wrap: wrap;
            gap: 0.6rem;
            margin-top: 1.2rem;
        }
.about-text .feature-tag span {
            background: rgba(56, 189, 248, 0.08);
            border: 1px solid var(--border-light);
            color: var(--text);
            padding: 0.35rem 0.9rem;
            border-radius: 999px;
            font-size: 0.85rem;
        }
.stats-row {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 1.2rem;
            margin: 2.5rem 0 1rem;
        }
.stats-row .stat-card {
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: 16px;
            padding: 1.5rem 1rem;
            text-align: center;
            transition: transform 0.25s ease, border-color 0.25s ease;
        }
.stats-row .stat-card:hover {
            transform: translateY(-4px);
            border-color: var(--primary);
        }
.stats-row .stat-card .num {
            font-size: 2rem;
            font-weight: 800;
            color: var(--primary);
            line-height: 1.2;
        }
.stats-row .stat-card .label {
            color: var(--text-dim);
            font-size: 0.85rem;
            margin-top: 0.3rem;
        }
.values-list {
            display: flex;
            flex-direction: column;
            gap: 1rem;
        }
.values-list .value-item {
            background: rgba(30, 41, 59, 0.5);
            border-left: 3px solid var(--primary);
            padding: 1rem 1.2rem;
            border-radius: 0 12px 12px 0;
        }
.values-list .value-item h4 {
            color: var(--text);
            font-weight: 600;
            font-size: 1.05rem;
            margin-bottom: 0.3rem;
        }
.values-list .value-item p {
            color: var(--text-dim);
            font-size: 0.9rem;
            line-height: 1.7;
            margin: 0;
        }
.timeline {
            position: relative;
            padding-left: 1.8rem;
        }
.timeline::before {
            content: '';
            position: absolute;
            left: 0.4rem;
            top: 0.3rem;
            bottom: 0.3rem;
            width: 2px;
            background: linear-gradient(to bottom, var(--primary), var(--accent), transparent);
            border-radius: 2px;
        }
.timeline .timeline-item {
            position: relative;
            margin-bottom: 2rem;
        }
.timeline .timeline-item::before {
            content: '';
            position: absolute;
            left: -1.8rem;
            top: 0.4rem;
            width: 0.8rem;
            height: 0.8rem;
            background: var(--bg);
            border: 2px solid var(--primary);
            border-radius: 50%;
        }
.timeline .timeline-item .year {
            font-weight: 700;
            color: var(--primary);
            font-size: 0.95rem;
            letter-spacing: 0.05em;
        }
.timeline .timeline-item h4 {
            color: var(--text);
            font-size: 1.1rem;
            font-weight: 600;
            margin: 0.2rem 0 0.4rem;
        }
.timeline .timeline-item p {
            color: var(--text-dim);
            font-size: 0.92rem;
            line-height: 1.7;
            margin: 0;
        }
.join-card {
            background: linear-gradient(135deg, rgba(56, 189, 248, 0.08), rgba(167, 139, 250, 0.08));
            border: 1px solid var(--border-light);
            border-radius: 20px;
            padding: 2rem;
            text-align: center;
        }
.join-card h3 {
            color: var(--text);
            font-weight: 700;
            margin-bottom: 0.8rem;
        }
.join-card p {
            color: var(--text-dim);
            max-width: 480px;
            margin: 0 auto 1.5rem;
            line-height: 1.8;
        }
.join-card .btn-custom {
            display: inline-block;
            padding: 0.7rem 2rem;
            border-radius: 999px;
            background: var(--primary);
            color: #0f172a;
            font-weight: 700;
            text-decoration: none;
            transition: all 0.25s ease;
        }
.join-card .btn-custom:hover {
            box-shadow: 0 0 24px rgba(56, 189, 248, 0.35);
            transform: translateY(-2px);
        }
.about-grid-2 {
                grid-template-columns: 1fr;
            }
.about-grid-2 .about-img {
                order: -1;
            }
.stats-row {
                grid-template-columns: repeat(2, 1fr);
            }
.about-section {
                padding: 2.5rem 0;
            }

/* --- 子页面追加 --- */
/* 本页专属小范围补充样式（会被自动合并进站点CSS） */
        .privacy-hero {
            padding: 100px 0 60px;
            background: radial-gradient(ellipse at 30% 40%, rgba(56, 189, 248, 0.08) 0%, transparent 60%),
                        radial-gradient(ellipse at 70% 60%, rgba(167, 139, 250, 0.06) 0%, transparent 50%);
            border-bottom: 1px solid var(--border);
        }
.privacy-hero .hero-title {
            margin-bottom: 16px;
        }
.privacy-hero .hero-sub {
            max-width: 640px;
            margin: 0 auto;
            color: var(--text-dim);
        }
.privacy-section {
            padding: 60px 0;
            border-bottom: 1px solid var(--border);
        }
.privacy-section:last-of-type {
            border-bottom: none;
        }
.privacy-section .section-title {
            font-size: 1.6rem;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 16px;
            display: flex;
            align-items: center;
            gap: 12px;
        }
.privacy-section .section-title i {
            color: var(--primary);
            font-size: 1.3rem;
        }
.privacy-section p {
            color: var(--text-dim);
            line-height: 1.8;
            margin-bottom: 16px;
        }
.privacy-section strong {
            color: var(--text);
            font-weight: 600;
        }
.privacy-list {
            padding-left: 0;
            list-style: none;
            margin: 16px 0;
        }
.privacy-list li {
            color: var(--text-dim);
            padding: 8px 0 8px 28px;
            position: relative;
            line-height: 1.7;
        }
.privacy-list li::before {
            content: '\f058';
            font-family: 'Font Awesome 6 Free';
            font-weight: 900;
            position: absolute;
            left: 0;
            top: 8px;
            color: var(--accent);
            font-size: 0.9rem;
        }
.privacy-box {
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: 12px;
            padding: 24px;
            margin: 24px 0;
        }
.privacy-box .box-title {
            color: var(--primary);
            font-weight: 600;
            margin-bottom: 12px;
            display: flex;
            align-items: center;
            gap: 8px;
        }
.privacy-box .box-title i {
            font-size: 1rem;
        }
.privacy-box p {
            margin-bottom: 8px;
            color: var(--text-dim);
        }
.last-updated {
            display: inline-block;
            background: rgba(56, 189, 248, 0.1);
            color: var(--primary);
            border: 1px solid rgba(56, 189, 248, 0.3);
            padding: 6px 16px;
            border-radius: 20px;
            font-size: 0.85rem;
            font-weight: 500;
            margin-top: 12px;
        }
.table-custom {
            width: 100%;
            border-collapse: collapse;
            margin: 20px 0;
        }
.table-custom th {
            background: rgba(56, 189, 248, 0.08);
            color: var(--text);
            font-weight: 600;
            padding: 12px 16px;
            text-align: left;
            border-bottom: 2px solid var(--border-light);
        }
.table-custom td {
            padding: 12px 16px;
            color: var(--text-dim);
            border-bottom: 1px solid var(--border);
        }
.table-custom tr:last-child td {
            border-bottom: none;
        }

/* --- 子页面追加 --- */
/* 保证Bootstrap组件不出现白底黑字, 但此处主要使用自定义类, 以下为安全覆盖 */
        .card, .card-body, .form-control, .list-group-item { background: transparent; color: var(--text); border-color: var(--border-light); }
.accordion-button, .accordion-item { background: var(--card-bg); color: var(--text); border-color: var(--border-light); }
.nav-link { color: var(--text-dim); }
.nav-link:hover, .nav-link.active { color: var(--primary); }
/* 条款页面特有细节 */
        .terms-hero { background: linear-gradient(135deg, rgba(15,23,42,0.6) 0%, rgba(30,41,59,0.8) 100%), radial-gradient(circle at 20% 30%, rgba(56,189,248,0.15), transparent 50%); }
.terms-section-title { font-weight: 700; letter-spacing: -0.01em; margin-top: 2.2rem; margin-bottom: 1rem; }
.terms-list { list-style: none; padding-left: 0; }
.terms-list li { padding-left: 1.8rem; position: relative; margin-bottom: 0.7rem; color: var(--text); }
.terms-list li::before { content: "\f058"; font-family: "Font Awesome 6 Free"; font-weight: 900; color: var(--primary); position: absolute; left: 0; top: 2px; font-size: 0.9rem; }
.legal-highlight { background: rgba(56, 189, 248, 0.08); border-left: 3px solid var(--primary); padding: 1.2rem 1.5rem; border-radius: 0 12px 12px 0; margin: 1.8rem 0; }
.legal-highlight p { margin-bottom: 0.5rem; }
.legal-highlight p:last-child { margin-bottom: 0; }
.badge-soft { background: rgba(167, 139, 250, 0.15); color: var(--accent); border-radius: 30px; padding: 0.2rem 1rem; font-size: 0.8rem; font-weight: 600; }
.section-anchor { scroll-margin-top: 90px; }

/* --- 子页面追加 --- */
/* 本页专属少量样式（会自动合并进站点CSS） */
        .disclaimer-hero {
            background: linear-gradient(135deg, rgba(56, 189, 248, 0.15) 0%, rgba(167, 139, 250, 0.15) 100%);
            border-bottom: 1px solid var(--border);
            padding: 80px 0 60px;
        }
.disclaimer-section {
            padding: 40px 0;
            border-bottom: 1px solid var(--border-light);
        }
.disclaimer-section:last-child {
            border-bottom: none;
        }
.disclaimer-section h2 {
            color: var(--primary);
            font-weight: 700;
            font-size: 1.5rem;
            margin-bottom: 20px;
            display: flex;
            align-items: center;
            gap: 10px;
        }
.disclaimer-section h2 i {
            font-size: 1.25rem;
            color: var(--accent);
        }
.disclaimer-section p, .disclaimer-section li {
            color: var(--text);
            line-height: 1.8;
            margin-bottom: 12px;
            font-size: 0.95rem;
        }
.disclaimer-section ul {
            padding-left: 20px;
            list-style: none;
        }
.disclaimer-section ul li {
            position: relative;
            padding-left: 18px;
        }
.disclaimer-section ul li::before {
            content: "▸";
            position: absolute;
            left: 0;
            color: var(--primary);
            font-weight: 700;
        }
.notice-box {
            background: rgba(56, 189, 248, 0.08);
            border: 1px solid rgba(56, 189, 248, 0.2);
            border-radius: 8px;
            padding: 20px 24px;
            margin: 25px 0;
        }
.notice-box p {
            margin-bottom: 0;
            color: var(--text-dim);
        }
.notice-box strong {
            color: var(--primary);
        }
.highlight-text {
            color: var(--accent);
            font-weight: 600;
        }
.active-nav {
            color: var(--primary) !important;
            border-bottom: 2px solid var(--primary);
        }

/* --- 子页面追加 --- */
/* 页面专属微调 */
        .guide-hero {
            background: linear-gradient(135deg, rgba(56, 189, 248, 0.08) 0%, rgba(167, 139, 250, 0.08) 100%);
            border-bottom: 1px solid var(--border);
        }
.step-card {
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: 12px;
            padding: 2rem 1.5rem;
            height: 100%;
            transition: transform .3s ease, box-shadow .3s ease;
            position: relative;
        }
.step-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--hover-shadow);
        }
.step-number {
            font-size: 2.5rem;
            font-weight: 800;
            color: var(--primary);
            opacity: 0.3;
            line-height: 1;
            margin-bottom: 1rem;
        }
.step-card h3 {
            font-size: 1.1rem;
            font-weight: 600;
            color: var(--text);
            margin-bottom: 0.75rem;
        }
.step-card p {
            color: var(--text-dim);
            font-size: 0.925rem;
            line-height: 1.7;
            margin-bottom: 0;
        }
.tip-box {
            background: rgba(56, 189, 248, 0.06);
            border: 1px solid rgba(56, 189, 248, 0.2);
            border-radius: 10px;
            padding: 1.25rem 1.5rem;
            margin-bottom: 1rem;
        }
.tip-box i {
            color: var(--primary);
            margin-right: 0.5rem;
        }
.tip-box p {
            color: var(--text-dim);
            font-size: 0.925rem;
            margin-bottom: 0;
            display: inline;
        }
.faq-custom-item {
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: 10px;
            padding: 1.5rem;
            margin-bottom: 1rem;
        }
.faq-custom-item h4 {
            color: var(--primary);
            font-size: 1rem;
            font-weight: 600;
            margin-bottom: 0.75rem;
        }
.faq-custom-item p {
            color: var(--text-dim);
            font-size: 0.925rem;
            line-height: 1.7;
            margin-bottom: 0;
        }
.shortcut-card {
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: 10px;
            padding: 1.5rem;
            text-align: center;
            transition: transform .3s ease, box-shadow .3s ease;
        }
.shortcut-card:hover {
            transform: translateY(-3px);
            box-shadow: var(--hover-shadow);
        }
.shortcut-card i {
            font-size: 1.75rem;
            color: var(--primary);
            margin-bottom: 0.75rem;
        }
.shortcut-card h4 {
            font-size: 0.95rem;
            font-weight: 600;
            color: var(--text);
            margin-bottom: 0.5rem;
        }
.shortcut-card p {
            font-size: 0.85rem;
            color: var(--text-dim);
            margin-bottom: 0;
            line-height: 1.6;
        }
.video-quality-badge {
            display: inline-block;
            background: rgba(56, 189, 248, 0.12);
            color: var(--primary);
            border: 1px solid rgba(56, 189, 248, 0.3);
            padding: 0.2rem 0.75rem;
            border-radius: 20px;
            font-size: 0.8rem;
            font-weight: 500;
            margin-right: 0.5rem;
            margin-bottom: 0.5rem;
        }
.device-icon {
            font-size: 2rem;
            color: var(--accent);
            margin-bottom: 1rem;
        }

/* --- Bootstrap 组件配色适配(程序自动补,避免白底黑字) --- */
.card-title { color:#e2e8f0 !important; }
.accordion-header { background:transparent !important; }