/* ============================================================
   A7验证 — 深色设计系统 (从 index.html 提取)
   用于：/network-verification /card-management /agent-distribution
         /device-binding 等深色功能页
   ============================================================ */

:root {
    --bg-primary: #06080f;
    --bg-secondary: #0c1020;
    --bg-card: rgba(15, 20, 40, 0.55);
    --border-subtle: rgba(255, 255, 255, 0.06);
    --border-glow: rgba(102, 126, 234, 0.3);
    --text-primary: #e8eaef;
    --text-secondary: #8b90a5;
    --text-muted: #5c6178;
    --accent-start: #667eea;
    --accent-end: #764ba2;
    --accent-glow: rgba(102, 126, 234, 0.25);
    --green: #33cabb;
    --green-glow: rgba(51, 202, 187, 0.25);
    --radius: 16px;
    --radius-sm: 10px;
    --transition: 0.35s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Segoe UI", sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.7;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

/* ===== 动态网格背景 ===== */
.bg-grid {
    position: fixed;
    inset: 0;
    z-index: 0;
    pointer-events: none;
    background-image:
        linear-gradient(rgba(102, 126, 234, 0.04) 1px, transparent 1px),
        linear-gradient(90deg, rgba(102, 126, 234, 0.04) 1px, transparent 1px);
    background-size: 60px 60px;
    mask-image: radial-gradient(ellipse 70% 70% at 50% 30%, black 30%, transparent 70%);
    -webkit-mask-image: radial-gradient(ellipse 70% 70% at 50% 30%, black 30%, transparent 70%);
}

/* 浮动光晕 */
.orb {
    position: fixed;
    border-radius: 50%;
    filter: blur(120px);
    opacity: 0.3;
    pointer-events: none;
    z-index: 0;
}
.orb-1 {
    width: 600px; height: 600px;
    background: var(--accent-start);
    top: -200px; left: -150px;
    animation: orbFloat 14s ease-in-out infinite;
}
.orb-2 {
    width: 500px; height: 500px;
    background: var(--accent-end);
    bottom: -150px; right: -120px;
    animation: orbFloat 16s ease-in-out infinite reverse;
}
.orb-3 {
    width: 350px; height: 350px;
    background: var(--green);
    top: 55%; left: 55%;
    animation: orbFloat 11s ease-in-out infinite 3s;
}

@keyframes orbFloat {
    0%, 100% { transform: translate(0, 0) scale(1); }
    25% { transform: translate(40px, -30px) scale(1.08); }
    50% { transform: translate(-20px, 20px) scale(0.94); }
    75% { transform: translate(-35px, -15px) scale(1.05); }
}

/* ===== 导航栏 ===== */
.navbar {
    position: fixed;
    top: 0; left: 0; right: 0;
    z-index: 1000;
    padding: 18px 0;
    transition: all var(--transition);
    background: transparent;
}
.navbar.scrolled {
    background: rgba(6, 8, 15, 0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-subtle);
    padding: 10px 0;
}
.navbar-brand {
    font-size: 1.35rem;
    font-weight: 700;
    letter-spacing: -0.5px;
    background: linear-gradient(135deg, var(--accent-start), var(--accent-end));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-decoration: none;
}
.navbar-brand:hover {
    -webkit-text-fill-color: unset;
    color: var(--accent-start);
}
.nav-links { display: flex; gap: 32px; align-items: center; }
.nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    transition: color var(--transition);
    position: relative;
}
.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -4px; left: 0; right: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--accent-start), var(--accent-end));
    transform: scaleX(0);
    transition: transform var(--transition);
    border-radius: 2px;
}
.nav-links a:hover { color: #fff; }
.nav-links a:hover::after { transform: scaleX(1); }

.btn-nav {
    padding: 8px 22px;
    border-radius: 50px;
    font-size: 0.85rem;
    font-weight: 600;
    text-decoration: none;
    transition: all var(--transition);
    border: 1px solid var(--border-glow);
    color: #fff;
    background: linear-gradient(135deg, var(--accent-start), var(--accent-end));
}
.btn-nav:hover {
    box-shadow: 0 0 30px var(--accent-glow);
    transform: translateY(-1px);
    color: #fff;
    text-decoration: none;
}
.btn-nav-outline {
    background: transparent;
    border: 1px solid rgba(255,255,255,0.2);
    color: var(--text-primary);
}
.btn-nav-outline:hover {
    border-color: var(--green);
    box-shadow: 0 0 24px var(--green-glow);
    background: rgba(51,202,187,0.08);
}

/* 移动端菜单 */
.nav-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
    z-index: 1001;
}
.nav-toggle span {
    display: block;
    width: 24px; height: 2px;
    background: var(--text-primary);
    margin: 5px 0;
    transition: all 0.3s;
    border-radius: 2px;
}
.nav-toggle.active span:nth-child(1) { transform: rotate(45deg) translate(5px,5px); }
.nav-toggle.active span:nth-child(2) { opacity: 0; }
.nav-toggle.active span:nth-child(3) { transform: rotate(-45deg) translate(5px,-5px); }

/* ===== 通用区块 ===== */
.section {
    position: relative;
    z-index: 1;
    padding: 100px 0;
}
.section-label {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 3px;
    text-transform: uppercase;
    color: var(--accent-start);
    margin-bottom: 12px;
    padding: 5px 14px;
    border-radius: 50px;
    background: rgba(102, 126, 234, 0.1);
    border: 1px solid rgba(102, 126, 234, 0.2);
}
.section-title {
    font-size: 2.5rem;
    font-weight: 800;
    letter-spacing: -1px;
    margin-bottom: 16px;
    line-height: 1.25;
}
.section-desc {
    font-size: 1.1rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto 48px;
}
.gradient-text {
    background: linear-gradient(135deg, var(--accent-start), var(--accent-end));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* ===== 面包屑 ===== */
.breadcrumb-nav {
    position: relative;
    z-index: 1;
    padding: 120px 0 0;
}
.breadcrumb-nav .breadcrumb {
    background: transparent;
    padding: 0;
    margin: 0;
    font-size: 0.85rem;
}
.breadcrumb-nav .breadcrumb-item a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: color 0.2s;
}
.breadcrumb-nav .breadcrumb-item a:hover { color: var(--accent-start); }
.breadcrumb-nav .breadcrumb-item.active { color: var(--text-muted); }
.breadcrumb-nav .breadcrumb-item + .breadcrumb-item::before { color: var(--text-muted); }

/* ===== Hero ===== */
.hero {
    position: relative;
    z-index: 1;
    min-height: 60vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 60px 24px 60px;
}
.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 18px;
    border-radius: 50px;
    background: rgba(102, 126, 234, 0.08);
    border: 1px solid rgba(102, 126, 234, 0.15);
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: 28px;
    animation: fadeInUp 0.8s ease-out;
}
.hero-badge .dot {
    width: 7px; height: 7px;
    border-radius: 50%;
    background: var(--green);
    box-shadow: 0 0 8px var(--green-glow);
    animation: pulse 2s ease-in-out infinite;
}
@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.4; }
}
.hero h1 {
    font-size: clamp(2.6rem, 6vw, 4.2rem);
    font-weight: 900;
    letter-spacing: -2px;
    line-height: 1.15;
    margin-bottom: 20px;
    animation: fadeInUp 0.8s ease-out 0.1s both;
}
.hero h1 .hl {
    background: linear-gradient(135deg, var(--accent-start), var(--accent-end));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}
.hero p.subtitle {
    font-size: 1.2rem;
    color: var(--text-secondary);
    max-width: 560px;
    margin: 0 auto 36px;
    animation: fadeInUp 0.8s ease-out 0.2s both;
}
.hero-actions {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
    animation: fadeInUp 0.8s ease-out 0.3s both;
}
.btn-primary-hero {
    padding: 14px 36px;
    border-radius: 50px;
    font-size: 1rem;
    font-weight: 700;
    text-decoration: none;
    color: #fff;
    background: linear-gradient(135deg, var(--accent-start), var(--accent-end));
    border: none;
    transition: all var(--transition);
    box-shadow: 0 4px 24px var(--accent-glow);
    display: inline-flex;
    align-items: center;
    gap: 8px;
}
.btn-primary-hero:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 40px rgba(102, 126, 234, 0.4);
    color: #fff;
    text-decoration: none;
}
.btn-outline-hero {
    padding: 14px 36px;
    border-radius: 50px;
    font-size: 1rem;
    font-weight: 600;
    text-decoration: none;
    color: var(--text-primary);
    background: transparent;
    border: 1px solid rgba(255,255,255,0.18);
    transition: all var(--transition);
    display: inline-flex;
    align-items: center;
    gap: 8px;
}
.btn-outline-hero:hover {
    border-color: var(--accent-start);
    background: rgba(102, 126, 234, 0.06);
    color: #fff;
    text-decoration: none;
    box-shadow: 0 0 28px rgba(102, 126, 234, 0.15);
}

/* 滚动指示器 */
.scroll-indicator {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    animation: fadeInUp 0.8s ease-out 0.6s both, bounce 2s ease-in-out infinite 1.5s;
}
.scroll-indicator .mouse {
    width: 26px; height: 40px;
    border: 2px solid var(--text-muted);
    border-radius: 14px;
    position: relative;
}
.scroll-indicator .mouse::after {
    content: '';
    position: absolute;
    top: 8px; left: 50%;
    transform: translateX(-50%);
    width: 4px; height: 8px;
    background: var(--accent-start);
    border-radius: 2px;
    animation: scrollWheel 1.6s ease-in-out infinite;
}
@keyframes scrollWheel {
    0% { opacity: 1; top: 8px; }
    100% { opacity: 0; top: 22px; }
}
@keyframes bounce {
    0%, 20%, 50%, 80%, 100% { transform: translateX(-50%) translateY(0); }
    40% { transform: translateX(-50%) translateY(-10px); }
    60% { transform: translateX(-50%) translateY(-4px); }
}

@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(30px); }
    to { opacity: 1; transform: translateY(0); }
}

/* ===== 数据条 ===== */
.stats-bar {
    position: relative;
    z-index: 1;
    padding: 60px 0;
    border-top: 1px solid var(--border-subtle);
    border-bottom: 1px solid var(--border-subtle);
    background: rgba(12, 16, 32, 0.5);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}
.stat-item { text-align: center; padding: 20px 0; }
.stat-number {
    font-size: 2.6rem;
    font-weight: 900;
    letter-spacing: -1px;
    background: linear-gradient(135deg, var(--accent-start), var(--accent-end));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1.2;
}
.stat-label {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-top: 4px;
    letter-spacing: 1px;
}

/* ===== 玻璃态卡片 ===== */
.glass-card {
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius);
    padding: 36px 28px;
    transition: all var(--transition);
    position: relative;
    overflow: hidden;
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
}
.glass-card::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.08), transparent);
    opacity: 0;
    transition: opacity var(--transition);
}
.glass-card:hover {
    transform: translateY(-6px);
    border-color: var(--border-glow);
    box-shadow: 0 16px 48px rgba(0,0,0,0.3), 0 0 40px var(--accent-glow);
}
.glass-card:hover::before { opacity: 1; }
.glass-card .card-icon {
    width: 52px; height: 52px;
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    margin-bottom: 18px;
    transition: all var(--transition);
}
.glass-card .card-icon.purple { background: rgba(102, 126, 234, 0.15); color: var(--accent-start); }
.glass-card .card-icon.green { background: rgba(51, 202, 187, 0.15); color: var(--green); }
.glass-card .card-icon.amber { background: rgba(245, 166, 35, 0.15); color: #f5a623; }
.glass-card .card-icon.rose { background: rgba(240, 80, 110, 0.15); color: #f0506e; }
.glass-card h3 {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 8px;
    letter-spacing: -0.3px;
}
.glass-card p {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin: 0;
    line-height: 1.6;
}

/* ===== 流程区 ===== */
.step-card {
    text-align: center;
    padding: 32px 20px;
    position: relative;
}
.step-number {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 56px; height: 56px;
    border-radius: 50%;
    font-size: 1.4rem;
    font-weight: 800;
    margin-bottom: 18px;
    background: linear-gradient(135deg, var(--accent-start), var(--accent-end));
    color: #fff;
    box-shadow: 0 8px 28px var(--accent-glow);
    position: relative;
    z-index: 2;
}
.step-card h3 { font-size: 1.05rem; font-weight: 700; margin-bottom: 6px; }
.step-card p { font-size: 0.88rem; color: var(--text-secondary); margin: 0; }

/* ===== 终端代码块 ===== */
.terminal {
    background: #0a0d16;
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: 0 20px 60px rgba(0,0,0,0.5);
}
.terminal-header {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 14px 18px;
    background: rgba(255,255,255,0.03);
    border-bottom: 1px solid var(--border-subtle);
}
.terminal-dot {
    width: 11px; height: 11px;
    border-radius: 50%;
}
.terminal-dot.red { background: #ff5f56; }
.terminal-dot.yellow { background: #ffbd2e; }
.terminal-dot.green { background: #27c93f; }
.terminal-title {
    margin-left: 8px;
    font-size: 0.78rem;
    color: var(--text-muted);
    letter-spacing: 0.5px;
}
.terminal-body {
    padding: 20px 22px;
    font-family: "SF Mono", "Fira Code", "Cascadia Code", Consolas, monospace;
    font-size: 0.88rem;
    line-height: 1.7;
    overflow-x: auto;
}
.terminal-body .kw { color: #c792ea; }
.terminal-body .fn { color: #82aaff; }
.terminal-body .str { color: #c3e88d; }
.terminal-body .cmt { color: #546e7a; }
.terminal-body .num { color: #f78c6c; }
.terminal-body .url { color: #89ddff; }
.terminal-body .curl { color: #ffcb6b; }

/* ===== CTA ===== */
.cta-section {
    position: relative;
    z-index: 1;
    padding: 100px 0;
    text-align: center;
}
.cta-card {
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.1), rgba(118, 75, 162, 0.1));
    border: 1px solid var(--border-glow);
    border-radius: 24px;
    padding: 64px 32px;
    position: relative;
    overflow: hidden;
}
.cta-card::after {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(ellipse at center, rgba(102, 126, 234, 0.08), transparent 70%);
    pointer-events: none;
}
.cta-card h2 {
    font-size: 2.2rem;
    font-weight: 800;
    letter-spacing: -1px;
    position: relative;
    z-index: 1;
}
.cta-card p {
    color: var(--text-secondary);
    font-size: 1.05rem;
    margin: 16px 0 32px;
    position: relative;
    z-index: 1;
}
.cta-card .btn-group {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
    position: relative;
    z-index: 1;
}

/* ===== 页脚 ===== */
.footer {
    position: relative;
    z-index: 1;
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-subtle);
    padding: 48px 0 28px;
}
.footer h3 {
    font-size: 0.9rem;
    font-weight: 700;
    letter-spacing: 0.5px;
    margin-bottom: 16px;
    color: var(--text-primary);
}
.footer a {
    color: var(--text-muted);
    font-size: 0.85rem;
    text-decoration: none;
    display: block;
    margin-bottom: 8px;
    transition: color 0.2s;
}
.footer a:hover { color: var(--accent-start); text-decoration: none; }
.footer-bottom {
    margin-top: 36px;
    padding-top: 20px;
    border-top: 1px solid var(--border-subtle);
    text-align: center;
    font-size: 0.8rem;
    color: var(--text-muted);
}
.footer-bottom a { display: inline; color: var(--text-muted); }

/* ===== 渐显动画 ===== */
.reveal {
    opacity: 0;
    transform: translateY(36px);
    transition: opacity 0.7s ease-out, transform 0.7s ease-out;
}
.reveal.visible {
    opacity: 1;
    transform: translateY(0);
}
.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }
.reveal-delay-4 { transition-delay: 0.4s; }
.reveal-delay-5 { transition-delay: 0.5s; }

/* ===== 内容排版辅助 ===== */
.content-section {
    position: relative;
    z-index: 1;
}
.lead-text {
    color: var(--text-secondary);
    font-size: 1.05rem;
    line-height: 1.9;
}
.lead-text p { margin-bottom: 16px; }

/* 段落标题 */
h2.section-title + .section-desc { margin-bottom: 48px; }

/* ===== FAQ ===== */
.faq-list { max-width: 860px; margin: 0 auto; }
.faq-item {
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-sm);
    padding: 22px 26px;
    margin-bottom: 16px;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    transition: border-color var(--transition);
}
.faq-item:hover { border-color: var(--border-glow); }
.faq-item h3 {
    font-size: 1.05rem;
    font-weight: 700;
    margin: 0 0 10px;
    color: var(--text-primary);
    display: flex;
    gap: 10px;
    align-items: flex-start;
}
.faq-item h3 .q-mark {
    color: var(--accent-start);
    font-weight: 800;
    flex-shrink: 0;
}
.faq-item p {
    font-size: 0.92rem;
    color: var(--text-secondary);
    margin: 0;
    line-height: 1.8;
}
.faq-item p a { color: var(--green); text-decoration: none; }
.faq-item p a:hover { text-decoration: underline; }

/* ===== 对比表 ===== */
.compare-table {
    width: 100%;
    border-collapse: separate;
    border-spacing: 0;
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius);
    overflow: hidden;
    background: var(--bg-card);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}
.compare-table th, .compare-table td {
    padding: 16px 18px;
    font-size: 0.92rem;
    text-align: left;
    border-bottom: 1px solid var(--border-subtle);
}
.compare-table thead th {
    background: rgba(102, 126, 234, 0.12);
    font-weight: 700;
    color: var(--text-primary);
    border-bottom: 1px solid var(--border-glow);
}
.compare-table tbody th {
    color: var(--text-primary);
    font-weight: 600;
    width: 26%;
}
.compare-table td { color: var(--text-secondary); }
.compare-table tr:last-child th, .compare-table tr:last-child td { border-bottom: none; }
.compare-table .col-ours {
    color: var(--green);
    font-weight: 600;
}
.compare-table .yes { color: var(--green); }
.compare-table .no { color: #f0506e; }
.compare-table .partial { color: #f5a623; }

/* ===== 内链区 ===== */
.inner-links {
    position: relative;
    z-index: 1;
    padding: 60px 0;
}
.inner-links-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 16px;
    margin-top: 24px;
}
.inner-link-card {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 18px 20px;
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-sm);
    text-decoration: none;
    transition: all var(--transition);
}
.inner-link-card:hover {
    border-color: var(--border-glow);
    transform: translateY(-3px);
    text-decoration: none;
    box-shadow: 0 10px 30px rgba(0,0,0,0.25);
}
.inner-link-card .il-icon {
    width: 42px; height: 42px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.3rem;
    background: rgba(102, 126, 234, 0.15);
    color: var(--accent-start);
    flex-shrink: 0;
}
.inner-link-card .il-title {
    color: var(--text-primary);
    font-weight: 600;
    font-size: 0.95rem;
}
.inner-link-card .il-desc {
    color: var(--text-muted);
    font-size: 0.78rem;
}

/* ===== 响应式 ===== */
@media (max-width: 991px) {
    .nav-links { display: none; }
    .nav-toggle { display: block; }
    .nav-links.mobile-open {
        display: flex;
        flex-direction: column;
        position: fixed;
        top: 0; left: 0; right: 0; bottom: 0;
        background: rgba(6,8,15,0.96);
        backdrop-filter: blur(20px);
        -webkit-backdrop-filter: blur(20px);
        justify-content: center;
        align-items: center;
        gap: 28px;
        z-index: 1000;
    }
    .nav-links.mobile-open a { font-size: 1.2rem; }
    .section-title { font-size: 1.8rem; }
    .hero h1 { font-size: clamp(2rem, 8vw, 3rem); }
}

@media (max-width: 767px) {
    .section { padding: 64px 0; }
    .hero { padding: 100px 16px 60px; min-height: auto; }
    .hero h1 { font-size: 2rem; }
    .hero p.subtitle { font-size: 1rem; }
    .btn-primary-hero, .btn-outline-hero {
        padding: 12px 28px;
        font-size: 0.9rem;
        width: 100%;
        justify-content: center;
    }
    .hero-actions { flex-direction: column; align-items: center; }
    .section-title { font-size: 1.6rem; }
    .stats-bar { padding: 32px 0; }
    .stat-number { font-size: 1.8rem; }
    .glass-card { padding: 24px 18px; }
    .cta-card { padding: 40px 18px; }
    .cta-card h2 { font-size: 1.5rem; }
    .terminal-body { font-size: 0.75rem; padding: 14px; }
    .breadcrumb-nav { padding-top: 100px; }
}