/* ==========================================================================
   Senflare Link 官网 - 主题橙风格 v5
========================================================================== */

:root {
    --orange: #FF6901;
    --orange-light: #FF8534;
    --orange-dark: #E55D00;
    --orange-bg: rgba(255, 105, 1, 0.08);
    --white: #ffffff;
    --gray-50: #fafafa;
    --gray-100: #f5f5f5;
    --gray-200: #eeeeee;
    --gray-400: #bdbdbd;
    --gray-500: #9e9e9e;
    --gray-600: #757575;
    --gray-800: #424242;
    --gray-900: #212121;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Noto Sans SC", sans-serif;
    background: var(--white);
    color: var(--gray-800);
    line-height: 1.6;
    overflow-x: hidden;
}

/* ==================== 顶部导航栏 ==================== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 0.75rem 2rem;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    transition: all 0.3s;
}
.header.scrolled { box-shadow: 0 2px 20px rgba(255, 105, 1, 0.1); }
.header-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.logo {
    display: flex;
    align-items: center;
    text-decoration: none;
}
.logo-text { font-size: 1.2rem; font-weight: 700; color: var(--gray-900); }
.logo-text span { color: var(--orange); }
.nav { display: flex; gap: 2rem; align-items: center; }
.nav a {
    color: var(--gray-900);
    text-decoration: none;
    font-size: 0.85rem;
    font-weight: 500;
    transition: color 0.3s;
}
.nav a:hover { color: var(--orange); }
.nav .btn { margin-left: 1rem; }
.nav .btn-primary {
    background: linear-gradient(135deg, var(--orange), var(--orange-light));
    color: white;
    border: none;
    box-shadow: 0 3px 12px rgba(255, 105, 1, 0.3);
}
.nav .btn-primary:hover { 
    transform: translateY(-1px); 
    box-shadow: 0 5px 20px rgba(255, 105, 1, 0.4); 
}

.btn {
    padding: 0.5rem 1.25rem;
    border-radius: 50px;
    font-size: 0.8rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
    text-decoration: none;
    border: none;
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
}
.btn-outline {
    background: transparent;
    border: 1.5px solid var(--gray-300);
    color: var(--gray-700);
}
.btn-outline:hover { border-color: var(--orange); color: var(--orange); }
.btn-primary {
    background: linear-gradient(135deg, var(--orange), var(--orange-light));
    color: white;
    box-shadow: 0 3px 12px rgba(255, 105, 1, 0.3);
}
.btn-primary:hover { transform: translateY(-1px); box-shadow: 0 5px 20px rgba(255, 105, 1, 0.4); }
.btn-lg { padding: 0.7rem 1.75rem; font-size: 0.9rem; }
.btn-white { background: white; color: var(--orange); box-shadow: 0 3px 15px rgba(0, 0, 0, 0.1); }
.btn-white:hover { transform: translateY(-1px); }
.btn-ghost-white { background: rgba(255, 255, 255, 0.15); border: 1.5px solid rgba(255, 255, 255, 0.3); color: white; }
.btn-ghost-white:hover { background: rgba(255, 255, 255, 0.25); }



/* ==================== 首屏横幅 - 科技风格 ==================== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: 6rem 2rem 4rem;
    position: relative;
    overflow: hidden;
    background: linear-gradient(135deg, #fafafa 0%, #ffffff 50%, #f5f5f5 100%);
}
.hero-bg {
    position: absolute;
    inset: 0;
    z-index: 0;
    overflow: hidden;
}

/* 科技网格 */
.cyber-grid {
    position: absolute;
    inset: 0;
    background-image: 
        linear-gradient(rgba(255, 105, 1, 0.06) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 105, 1, 0.06) 1px, transparent 1px);
    background-size: 60px 60px;
}

/* 光晕效果 */
.cyber-glow {
    position: absolute;
    border-radius: 50%;
    filter: blur(100px);
}
.cyber-glow-1 {
    width: 600px;
    height: 600px;
    top: -150px;
    right: -100px;
    background: radial-gradient(circle, rgba(255, 105, 1, 0.12) 0%, transparent 70%);
    animation: glowPulse 6s ease-in-out infinite;
}
.cyber-glow-2 {
    width: 400px;
    height: 400px;
    bottom: -100px;
    left: 10%;
    background: radial-gradient(circle, rgba(229, 93, 0, 0.08) 0%, transparent 70%);
    animation: glowPulse 8s ease-in-out infinite reverse;
}
@keyframes glowPulse {
    0%, 100% { opacity: 0.5; transform: scale(1); }
    50% { opacity: 1; transform: scale(1.05); }
}

/* 全球网络效果 */
.network-canvas {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
}
.hero-inner {
    max-width: 1100px;
    margin: 0 auto;
    width: 100%;
    position: relative;
    z-index: 1;
}
.hero-content { text-align: left; }
.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: var(--orange-bg);
    color: var(--orange);
    padding: 0.4rem 1rem;
    border-radius: 50px;
    font-size: 0.75rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
    border: 1px solid rgba(230, 81, 0, 0.15);
}
.hero-badge-dot {
    width: 6px;
    height: 6px;
    background: var(--orange);
    border-radius: 50%;
    animation: blink 1.5s infinite;
}
@keyframes blink {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.3; }
}
.hero-title {
    font-size: 2.5rem;
    font-weight: 800;
    line-height: 1.3;
    margin-top: 1.5rem;
    margin-bottom: 1.25rem;
    color: var(--gray-900);
}
.hero-title .typewriter {
    display: inline-block;
    background: linear-gradient(135deg, var(--orange), var(--orange-dark));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    border-right: 3px solid var(--orange);
    animation: cursorBlink 0.8s step-end infinite;
}
@keyframes cursorBlink {
    0%, 100% { border-color: var(--orange); }
    50% { border-color: transparent; }
}
.hero-desc {
    font-size: 0.95rem;
    color: var(--gray-600);
    margin-bottom: 2rem;
    line-height: 1.8;
    max-width: 480px;
}
.hero-actions { display: flex; gap: 0.75rem; flex-wrap: wrap; }
.hero-trust {
    margin-top: 2.5rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--gray-200);
    font-size: 0.8rem;
    color: var(--gray-500);
    display: flex;
    align-items: center;
    gap: 0.4rem;
    flex-wrap: wrap;
}
.hero-trust strong { color: var(--orange); font-weight: 700; }
.hero-trust-sep { color: var(--gray-300); margin: 0 0.5rem; }

/* Hero 指标 */
.hero-metrics {
    margin-top: 2.5rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--gray-200);
    font-size: 0.85rem;
    color: var(--gray-500);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    flex-wrap: wrap;
    line-height: 2;
}
.hero-metrics strong { color: var(--orange); font-weight: 700; }
.hero-metrics-sep { color: var(--gray-300); }

/* ==================== 通用区块样式 ==================== */
.section { padding: 5rem 2rem; }
.section-inner { max-width: 1100px; margin: 0 auto; }
.section-header-left { margin-bottom: 2.5rem; }

.section-title {
    font-size: 1.75rem;
    font-weight: 800;
    color: var(--gray-900);
    margin-bottom: 0.75rem;
}
.section-title span { color: var(--orange); }
.section-desc { font-size: 0.9rem; color: var(--gray-500); max-width: 500px; line-height: 1.7; }


/* ==================== 功能特性 ==================== */
.features-section { 
    background: var(--gray-50); 
    position: relative;
    overflow: hidden;
}
.features-section::before,
.features-section::after {
    content: '';
    position: absolute;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(255, 105, 1, 0.06) 0%, transparent 70%);
    pointer-events: none;
}
.features-section::before {
    width: 400px;
    height: 400px;
    top: -100px;
    right: -100px;
}
.features-section::after {
    width: 300px;
    height: 300px;
    bottom: -80px;
    left: -80px;
}
.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1rem;
}
.feature-card {
    background: white;
    border-radius: 10px;
    padding: 0.9rem 1rem;
    border: 1px solid var(--gray-100);
    transition: all 0.3s;
    display: flex;
    align-items: center;
    gap: 1rem;
}
.feature-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(255, 105, 1, 0.1);
    border-color: var(--orange);
}
.feature-content { flex: 1; }
.feature-icon {
    width: 40px;
    height: 40px;
    background: var(--orange-bg);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    flex-shrink: 0;
    transition: all 0.3s;
    order: 1;
}
.feature-card:hover .feature-icon {
    background: linear-gradient(135deg, var(--orange), var(--orange-light));
    transform: scale(1.05);
}
.feature-card:hover .feature-icon span { filter: brightness(0) invert(1); }
.feature-title { font-size: 0.85rem; font-weight: 700; color: var(--gray-900); margin-bottom: 0.2rem; }
.feature-desc { font-size: 0.72rem; color: var(--gray-500); line-height: 1.5; }

/* ==================== 术语解释 ==================== */
.glossary-section { 
    background: var(--gray-50); 
    position: relative;
    overflow: hidden;
}
.glossary-section::before {
    content: '';
    position: absolute;
    width: 400px;
    height: 400px;
    bottom: -120px;
    left: -120px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(255, 105, 1, 0.05) 0%, transparent 70%);
    pointer-events: none;
}
.glossary-content {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem 3rem;
}
.glossary-item h4 {
    font-size: 0.9rem;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: 0.5rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}
.glossary-item h4::before {
    content: '';
    width: 3px;
    height: 14px;
    background: var(--orange);
    border-radius: 2px;
}
.glossary-item p {
    font-size: 0.8rem;
    color: var(--gray-600);
    line-height: 1.75;
}

/* ==================== 工作原理 ==================== */
.how-section { 
    background: white; 
    position: relative;
    overflow: hidden;
}
.how-section::before {
    content: '';
    position: absolute;
    width: 350px;
    height: 350px;
    top: -100px;
    right: -100px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(255, 105, 1, 0.04) 0%, transparent 70%);
    pointer-events: none;
}
.how-layout { max-width: 600px; }
.how-lead {
    font-size: 0.9rem;
    color: var(--gray-600);
    line-height: 1.8;
    margin-bottom: 2rem;
}
.how-steps { display: flex; flex-direction: column; gap: 1.25rem; }
.how-step {
    display: flex;
    gap: 1rem;
    align-items: flex-start;
}
.how-step-num {
    width: 36px;
    height: 36px;
    background: var(--orange-bg);
    color: var(--orange);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.75rem;
    font-weight: 800;
    flex-shrink: 0;
}
.how-step-content h4 {
    font-size: 0.9rem;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: 0.25rem;
}
.how-step-content p {
    font-size: 0.8rem;
    color: var(--gray-500);
    line-height: 1.6;
}

/* ==================== 网络检测 ==================== */
.network-section { 
    background: var(--gray-50); 
    position: relative;
    overflow: hidden;
}
.network-section::before {
    content: '';
    position: absolute;
    width: 350px;
    height: 350px;
    top: -100px;
    left: -100px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(255, 105, 1, 0.05) 0%, transparent 70%);
    pointer-events: none;
}
.network-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1rem;
}
.network-card {
    background: white;
    border-radius: 12px;
    padding: 1.25rem;
    cursor: pointer;
    transition: all 0.3s;
    border: 1px solid var(--gray-100);
    text-align: center;
}
.network-card:hover {
    box-shadow: 0 10px 30px rgba(255, 105, 1, 0.1);
    transform: translateY(-3px);
    border-color: var(--orange);
}
.network-title { font-size: 0.7rem; color: var(--gray-500); margin-bottom: 0.4rem; font-weight: 600; text-transform: uppercase; letter-spacing: 0.5px; }
.network-ip { font-size: 0.9rem; font-weight: 700; color: var(--orange); margin-bottom: 0.25rem; word-break: break-all; }
.network-loc { font-size: 0.75rem; color: var(--gray-600); }


/* ==================== 技术架构 ==================== */
.tech-section {
    background: var(--gray-900);
    color: white;
    position: relative;
    overflow: hidden;
    padding: 4rem 2rem;
}
.tech-section::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(255, 105, 1, 0.12) 0%, transparent 70%);
    animation: gradientMove 15s ease-in-out infinite;
}
.tech-section .section-inner { position: relative; z-index: 1; }
.tech-section .section-title { color: white; }
.tech-section .section-title span { color: var(--orange); }
.tech-layout {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}
.tech-left { width: 100%; }
.tech-right { width: 100%; }
.tech-lead {
    font-size: 0.85rem;
    color: rgba(255, 255, 255, 0.55);
    line-height: 1.8;
    margin: 1rem 0 1rem;
}
.tech-stats {
    display: flex;
    gap: 2rem;
}
.tech-stat {
    text-align: center;
}
.tech-stat-value {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--orange);
    line-height: 1;
}
.tech-stat-label {
    font-size: 0.7rem;
    color: rgba(255, 255, 255, 0.45);
    margin-top: 0.35rem;
}
.tech-diagram {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    width: 100%;
}
.tech-layer {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem 1.25rem;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 10px;
    transition: all 0.3s;
    width: 100%;
}
.tech-layer:hover {
    background: rgba(255, 255, 255, 0.06);
    border-color: rgba(245, 124, 0, 0.3);
}
.tech-layer-label {
    font-size: 0.7rem;
    color: rgba(255, 255, 255, 0.4);
    width: 50px;
    flex-shrink: 0;
}
.tech-layer-tags {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}
.tech-layer-tags span {
    padding: 0.35rem 0.75rem;
    background: rgba(255, 255, 255, 0.08);
    border-radius: 4px;
    font-size: 0.75rem;
    font-weight: 500;
    color: rgba(255, 255, 255, 0.7);
    transition: all 0.3s;
}
.tech-layer-tags span.active {
    background: var(--orange);
    color: white;
}
.tech-layer:hover .tech-layer-tags span:not(.active) {
    background: rgba(255, 255, 255, 0.12);
}

/* ==================== 核心优势 ==================== */
.advantages-section { 
    background: white; 
    position: relative;
    overflow: hidden;
}
.advantages-section::before {
    content: '';
    position: absolute;
    width: 300px;
    height: 300px;
    bottom: -80px;
    right: -80px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(255, 105, 1, 0.05) 0%, transparent 70%);
    pointer-events: none;
}
.advantages-layout {
    display: block;
}
.advantages-lead {
    font-size: 0.9rem;
    color: var(--gray-600);
    line-height: 1.8;
    margin-bottom: 2rem;
}
.advantages-list { 
    display: grid; 
    grid-template-columns: repeat(2, 1fr); 
    gap: 1.5rem 3rem; 
}
.advantage-item {
    display: flex;
    gap: 1rem;
    align-items: flex-start;
}
.advantage-item .advantage-icon {
    width: 44px;
    height: 44px;
    background: var(--orange-bg);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    flex-shrink: 0;
}
.advantage-text h4 {
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: 0.25rem;
}
.advantage-text p {
    font-size: 0.8rem;
    color: var(--gray-500);
    line-height: 1.6;
}



/* ==================== 页脚 ==================== */
.footer {
    background: var(--gray-900);
    color: white;
    padding: 2.5rem 2rem;
}
.footer-inner { max-width: 1100px; margin: 0 auto; }
.footer-content {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    text-align: left;
    gap: 1.5rem;
}
.footer-brand { text-align: left; }
.footer-logo-text { font-size: 1.1rem; font-weight: 700; }
.footer-logo-text span { color: var(--orange); }
.footer-desc {
    font-size: 0.8rem;
    color: rgba(255, 255, 255, 0.45);
    margin-top: 0.5rem;
    line-height: 1.6;
}
.footer-links {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
    align-items: center;
    justify-content: center;
    width: 100%;
}
.footer-links a {
    color: rgba(255, 255, 255, 0.5);
    text-decoration: none;
    font-size: 0.8rem;
    transition: color 0.3s;
}
.footer-links a:hover { color: var(--orange); }
.footer-sep { color: rgba(255, 255, 255, 0.25); font-size: 0.75rem; }
.copyright { font-size: 0.75rem; color: rgba(255, 255, 255, 0.35); width: 100%; text-align: center; }

/* ==================== 动画效果 ==================== */
/* 滚动进入动画 */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}
.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}
.fade-in-left {
    opacity: 0;
    transform: translateX(-30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}
.fade-in-left.visible {
    opacity: 1;
    transform: translateX(0);
}
.fade-in-right {
    opacity: 0;
    transform: translateX(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}
.fade-in-right.visible {
    opacity: 1;
    transform: translateX(0);
}

/* 延迟动画 */
.delay-1 { transition-delay: 0.1s; }
.delay-2 { transition-delay: 0.2s; }
.delay-3 { transition-delay: 0.3s; }
.delay-4 { transition-delay: 0.4s; }
.delay-5 { transition-delay: 0.5s; }

/* Hero 入场动画 */
.hero-content { animation: heroFadeIn 0.8s ease forwards; }
@keyframes heroFadeIn {
    from { opacity: 0; transform: translateY(40px); }
    to { opacity: 1; transform: translateY(0); }
}
.hero-title { animation: heroFadeIn 0.8s ease 0.1s forwards; opacity: 0; }
.hero-desc { animation: heroFadeIn 0.8s ease 0.2s forwards; opacity: 0; }
.hero-actions { animation: heroFadeIn 0.8s ease 0.3s forwards; opacity: 0; }
.hero-metrics { animation: heroFadeIn 0.8s ease 0.4s forwards; opacity: 0; }

/* 背景形状浮动动画 */
.hero-shape-1 {
    animation: float1 8s ease-in-out infinite;
}
.hero-shape-2 {
    animation: float2 10s ease-in-out infinite;
}
@keyframes float1 {
    0%, 100% { transform: translate(0, 0) rotate(0deg); }
    50% { transform: translate(-20px, 20px) rotate(5deg); }
}
@keyframes float2 {
    0%, 100% { transform: translate(0, 0); }
    50% { transform: translate(15px, -15px); }
}

/* 脉冲动画 */
@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.05); }
}
.btn-primary:hover {
    animation: pulse 0.6s ease;
}

/* 数据流动画 */
.tech-flow-arrow {
    animation: flowArrow 1.5s ease-in-out infinite;
}
@keyframes flowArrow {
    0%, 100% { opacity: 0.5; transform: translateX(0); }
    50% { opacity: 1; transform: translateX(3px); }
}

/* 图标旋转动画 */
.feature-card:hover .feature-icon {
    animation: iconPop 0.4s ease;
}
@keyframes iconPop {
    0% { transform: scale(1); }
    50% { transform: scale(1.15); }
    100% { transform: scale(1.05); }
}

/* 网络检测卡片加载动画 */
.network-card .network-ip {
    transition: color 0.3s ease;
}
@keyframes ipPulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}
.network-ip.loading {
    animation: ipPulse 1s ease-in-out infinite;
}

/* 计数器动画 */
@keyframes countUp {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

/* 渐变背景动画 */
.tech-section::before {
    animation: gradientMove 15s ease-in-out infinite;
}
@keyframes gradientMove {
    0%, 100% { transform: translate(0, 0); }
    50% { transform: translate(-30px, 30px); }
}

/* ==================== 提示消息 ==================== */
.toast {
    position: fixed;
    top: 80px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--gray-900);
    color: white;
    padding: 0.75rem 1.5rem;
    border-radius: 10px;
    font-size: 0.85rem;
    font-weight: 500;
    z-index: 2000;
    box-shadow: 0 10px 35px rgba(0, 0, 0, 0.2);
    animation: toastIn 0.3s ease;
}
.toast.hide { animation: toastOut 0.3s ease forwards; }
@keyframes toastIn { from { opacity: 0; transform: translateX(-50%) translateY(-15px); } to { opacity: 1; transform: translateX(-50%) translateY(0); } }
@keyframes toastOut { from { opacity: 1; } to { opacity: 0; transform: translateX(-50%) translateY(-15px); } }

/* ==================== 延迟测试卡片 ==================== */
:root {
    --latency-49: #22c55e;
    --latency-149: #84cc16;
    --latency-299: #faab41;
    --latency-999: #f97316;
    --latency-1000: #ef4444;
    --latency-fail: #ef4444;
}

.latency-cards {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1rem;
}
.latency-card {
    background: white;
    border-radius: 12px;
    padding: 1rem;
    border: 1px solid var(--gray-100);
    transition: all 0.3s;
}
.latency-card:hover {
    box-shadow: 0 8px 24px rgba(255, 105, 1, 0.1);
    transform: translateY(-2px);
    border-color: var(--orange);
}
.latency-card-title {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 0.75rem;
}
.latency-card-icon {
    width: 20px;
    height: 20px;
    flex-shrink: 0;
}
.latency-card-icon svg {
    width: 100%;
    height: 100%;
}
.latency-card-name {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--gray-900);
}
.latency-value {
    margin-left: auto;
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--latency-149);
}
.latency-card-region {
    font-size: 0.65rem;
    padding: 2px 6px;
    border-radius: 4px;
    font-weight: 500;
}
.latency-card-region-domestic {
    background: rgba(255, 105, 1, 0.1);
    color: var(--orange);
}
.latency-card-region-international {
    background: rgba(59, 130, 246, 0.1);
    color: #3b82f6;
}
.latency-card-content {
    margin-top: 0.5rem;
}
.latency-bars {
    display: flex;
    gap: 3px;
    height: 6px;
    align-items: flex-end;
}
.latency-bar {
    flex: 1;
    height: 100%;
    border-radius: 2px;
    background: var(--gray-200);
    transition: background-color 0.3s;
}
.latency-bar.loading {
    animation: latencyPulse 1s ease-in-out infinite;
    background: rgba(250, 171, 65, 0.4);
}
@keyframes latencyPulse {
    0%, 100% { opacity: 0.4; }
    50% { opacity: 0.8; }
}

@media (max-width: 900px) {
    .latency-cards { grid-template-columns: repeat(2, 1fr); }
    .latency-card { padding: 0.85rem; }
    .latency-card-title { gap: 0.4rem; margin-bottom: 0.5rem; }
    .latency-card-icon { width: 18px; height: 18px; }
    .latency-card-name { font-size: 0.8rem; }
    .latency-value { font-size: 0.7rem; }
    .latency-card-region { font-size: 0.6rem; padding: 1px 5px; }
}
@media (max-width: 600px) {
    .latency-cards { grid-template-columns: repeat(2, 1fr); gap: 0.6rem; }
    .latency-card { padding: 0.65rem; border-radius: 8px; }
    .latency-card-title { gap: 0.35rem; margin-bottom: 0.4rem; }
    .latency-card-icon { width: 16px; height: 16px; }
    .latency-card-name { font-size: 0.72rem; }
    .latency-value { font-size: 0.65rem; }
    .latency-card-region { font-size: 0.55rem; padding: 1px 4px; }
    .latency-card-content { margin-top: 0.35rem; }
    .latency-bars { height: 4px; gap: 2px; }
}
@media (max-width: 400px) {
    .latency-cards { gap: 0.5rem; }
    .latency-card { padding: 0.5rem; }
    .latency-card-icon { width: 14px; height: 14px; }
    .latency-card-name { font-size: 0.65rem; }
    .latency-value { font-size: 0.6rem; }
    .latency-card-region { font-size: 0.5rem; }
}

/* ==================== 移动端导航 ==================== */
.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
    z-index: 1001;
}
.nav-toggle span {
    width: 22px;
    height: 2px;
    background: var(--gray-800);
    border-radius: 2px;
    transition: all 0.3s;
}
.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); }

/* 遮罩层 */
.nav-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.3);
    z-index: 999;
    opacity: 0;
    transition: opacity 0.3s;
}
.nav-overlay.show {
    display: block;
    opacity: 1;
}

/* ==================== 响应式适配 ==================== */
@media (max-width: 900px) {
    .header-inner { padding: 0 1rem; }
    .hero-title { font-size: 2rem; }
    .hero-desc { font-size: 0.9rem; }
    .hero-metrics-sep { display: none; }
    .hero-metrics { flex-direction: column; gap: 0.25rem; }
    .advantages-list { grid-template-columns: 1fr; gap: 1.25rem; }
    .features-grid { grid-template-columns: repeat(2, 1fr); }
    .glossary-content { grid-template-columns: 1fr; gap: 1.25rem; }
    .network-grid { grid-template-columns: repeat(2, 1fr); }
    .section { padding: 3.5rem 1.5rem; }
}
@media (max-width: 768px) {
    .header { padding: 1.1rem 1.5rem; }
    .logo-text { font-size: 1.05rem; }
    .nav-toggle { display: flex; padding: 6px; }
    .nav-toggle span { width: 18px; height: 1.5px; }
    .nav {
        position: fixed;
        top: 54px;
        left: 0;
        right: 0;
        background: white;
        flex-direction: column;
        padding: 0;
        gap: 0;
        box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
        max-height: 0;
        overflow: hidden;
        transition: max-height 0.3s ease;
        z-index: 1000;
    }
    .nav.open { max-height: 360px; }
    .nav a {
        display: flex;
        align-items: center;
        justify-content: flex-start;
        padding: 0.9rem 1.25rem;
        border-bottom: 1px solid var(--gray-200);
        font-size: 0.85rem;
        text-align: left;
        margin: 0;
        width: 100%;
    }
    .nav a:last-of-type:not(.nav-btn-hide) { border-bottom: none; }
    .nav .nav-btn-hide { display: none; }
    .hero { padding: 6rem 1.5rem 3rem; min-height: auto; }
    .hero-title { font-size: 1.8rem; line-height: 1.35; margin-top: 2rem; }
    .hero-actions .btn { padding: 0.5rem 1.25rem; font-size: 0.85rem; }
    .hero-desc { font-size: 0.85rem; }
    .hero-metrics { 
        font-size: 0.8rem; 
        flex-direction: row;
        flex-wrap: wrap;
        gap: 0.5rem 1rem;
    }
    .hero-metrics-sep { display: none; }
    .footer-links { flex-direction: row; flex-wrap: wrap; gap: 0.5rem 0.75rem; }
}
@media (max-width: 600px) {
    .header { padding: 1rem 1rem; }
    .logo-text { font-size: 1rem; }
    .nav { top: 50px; }
    .nav a { padding: 0.7rem 1rem; font-size: 0.8rem; width: 100%; }
    .hero { padding: 5.5rem 1rem 2.5rem; }
    .hero-title { font-size: 1.5rem; margin-top: 1.75rem; }
    .hero-actions .btn { padding: 0.45rem 1rem; font-size: 0.8rem; }
    .hero-desc { font-size: 0.8rem; }
    .hero-metrics { gap: 0.4rem 0.8rem; font-size: 0.75rem; }
    .cyber-grid { display: none; }
    .section { padding: 2.5rem 1rem; }
    .section-title { font-size: 1.35rem; }
    .section-desc { font-size: 0.85rem; }
    .features-grid { grid-template-columns: 1fr; gap: 0.75rem; }
    .feature-card { padding: 0.85rem; }
    .network-grid { grid-template-columns: 1fr 1fr; gap: 0.75rem; }
    .network-card { padding: 1rem; }
    .tech-layout { gap: 1.5rem; }
    .tech-layer { flex-direction: column; align-items: flex-start; gap: 0.5rem; }
    .tech-layer-label { width: auto; }
    .how-layout { max-width: 100%; }
    .how-lead { font-size: 0.85rem; }
    .advantage-item { gap: 0.75rem; }
    .advantage-item .advantage-icon { width: 38px; height: 38px; font-size: 1rem; }
    .footer { padding: 1.5rem 1rem; }
    .footer-links { flex-direction: row; flex-wrap: wrap; gap: 0.4rem 0.6rem; }
    .footer-links a { font-size: 0.75rem; }
    .footer-sep { display: inline; }
}