/* ==========================================================================
 一分机场 (1fen-jichang.homes) 核心设计系统
 风格：一分机场 VPN + 现代普惠金融 + 轻量 SaaS
 主色调：浅暖米白 (#FAF7EF)、铜币橙 (#C9793D)、薄荷绿 (#10B981)、账单蓝 (#2563EB)、深石墨黑 (#1A1D20)
 ========================================================================== */

:root {
 /* 品牌色彩体系 */
 --bg-primary: #FAF7EF; /* 浅暖米白背景 */
 --bg-secondary: #F3EFE4; /* 次级米白/卡片底色 */
 --bg-surface: rgba(255, 255, 255, 0.82); /* 半透明高亮玻璃表面 */
 --bg-glass: rgba(255, 255, 255, 0.65);
 --bg-dark: #1A1D20; /* 深石墨黑 */
 --bg-dark-surface: #24282D;

 /* 强调色 */
 --copper-orange: #C9793D; /* 核心铜币橙 */
 --copper-orange-light: #E29457;
 --copper-orange-dark: #9E5522;
 --copper-glow: rgba(201, 121, 61, 0.25);

 --mint-green: #10B981; /* 薄荷绿 (连通/正常/安全) */
 --mint-green-light: #34D399;
 --mint-green-bg: #E6F7F2;
 --mint-glow: rgba(16, 185, 129, 0.25);

 --bill-blue: #2563EB; /* 账单蓝 (规则/数据/指引) */
 --bill-blue-light: #3B82F6;
 --bill-blue-bg: #EFF6FF;

 --accent-gold: #F59E0B; /* 节点金色高光 */

 /* 文字颜色 */
 --text-primary: #1A1D20; /* 深石墨主标题与正文 */
 --text-secondary: #4B5563; /* 次级文字 */
 --text-muted: #6B7280; /* 提示与元数据 */
 --text-inverse: #FFFFFF; /* 反白文字 */

 /* 边框与透明投影 */
 --border-light: rgba(201, 121, 61, 0.15);
 --border-glass: rgba(255, 255, 255, 0.6);
 --border-subtle: rgba(0, 0, 0, 0.06);

 --shadow-sm: 0 2px 8px rgba(26, 29, 32, 0.04);
 --shadow-md: 0 8px 24px rgba(201, 121, 61, 0.08), 0 2px 6px rgba(0, 0, 0, 0.03);
 --shadow-lg: 0 16px 36px rgba(201, 121, 61, 0.12), 0 4px 12px rgba(0, 0, 0, 0.05);
 --shadow-glass: 0 12px 32px 0 rgba(31, 38, 135, 0.07);
 --shadow-coin: 0 8px 16px rgba(201, 121, 61, 0.2), inset 0 2px 4px rgba(255, 255, 255, 0.6);

 /* 字体族 */
 --font-sans: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
 --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;

 /* 布局与圆角 */
 --container-max: 1200px;
 --radius-sm: 8px;
 --radius-md: 14px;
 --radius-lg: 22px;
 --radius-full: 9999px;

 /* 动效过渡 */
 --transition-fast: 0.2s cubic-bezier(0.16, 1, 0.3, 1);
 --transition-normal: 0.35s cubic-bezier(0.16, 1, 0.3, 1);
 --transition-bounce: 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);
}

/* 基础重置 */
*, *::before, *::after {
 box-sizing: border-box;
 margin: 0;
 padding: 0;
}

html {
 font-size: 16px;
 scroll-behavior: smooth;
 -webkit-font-smoothing: antialiased;
 -moz-osx-font-smoothing: grayscale;
}

body {
 font-family: var(--font-sans);
 background-color: var(--bg-primary);
 color: var(--text-primary);
 line-height: 1.68;
 overflow-x: hidden;
 position: relative;
 background-image: 
 radial-gradient(circle at 10% 20%, rgba(201, 121, 61, 0.04) 0%, transparent 40%),
 radial-gradient(circle at 90% 70%, rgba(16, 185, 129, 0.035) 0%, transparent 45%),
 radial-gradient(circle at 50% 50%, rgba(37, 99, 235, 0.02) 0%, transparent 60%);
 background-attachment: fixed;
}

/* 容器规范 */
.container {
 width: 100%;
 max-width: var(--container-max);
 margin-left: auto;
 margin-right: auto;
 padding-left: 24px;
 padding-right: 24px;
}

/* 链接样式 */
a {
 color: var(--copper-orange);
 text-decoration: none;
 transition: color var(--transition-fast);
}

a:hover {
 color: var(--copper-orange-dark);
}

/* 导航栏 (Sticky Glass Navbar) */
.navbar {
 position: sticky;
 top: 0;
 z-index: 1000;
 background: rgba(250, 247, 239, 0.88);
 backdrop-filter: blur(16px);
 -webkit-backdrop-filter: blur(16px);
 border-bottom: 1px solid var(--border-light);
 transition: all var(--transition-normal);
}

.navbar-container {
 display: flex;
 align-items: center;
 justify-content: space-between;
 height: 74px;
}

.brand-logo {
 display: flex;
 align-items: center;
 gap: 12px;
 font-weight: 800;
 font-size: 1.25rem;
 color: var(--text-primary);
 letter-spacing: -0.02em;
}

.brand-logo img {
 width: 40px;
 height: 40px;
 border-radius: 50%;
 box-shadow: 0 4px 10px var(--copper-glow);
 object-fit: cover;
 transition: transform var(--transition-bounce);
}

.brand-logo:hover img {
 transform: rotate(12deg) scale(1.08);
}

.brand-badge {
 font-size: 0.75rem;
 font-weight: 600;
 padding: 3px 8px;
 background: var(--copper-orange);
 color: #fff;
 border-radius: var(--radius-full);
 margin-left: 4px;
 box-shadow: 0 2px 6px var(--copper-glow);
}

.nav-links {
 display: flex;
 align-items: center;
 gap: 28px;
 list-style: none;
}

.nav-links a {
 color: var(--text-secondary);
 font-weight: 500;
 font-size: 0.95rem;
 padding: 6px 4px;
 position: relative;
 transition: color var(--transition-fast);
}

.nav-links a::after {
 content: '';
 position: absolute;
 bottom: 0;
 left: 0;
 width: 0%;
 height: 2px;
 background: var(--copper-orange);
 transition: width var(--transition-normal);
 border-radius: 2px;
}

.nav-links a:hover {
 color: var(--copper-orange);
}

.nav-links a:hover::after {
 width: 100%;
}

.nav-cta {
 display: flex;
 align-items: center;
 gap: 14px;
}

/* 按钮规范 */
.btn {
 display: inline-flex;
 align-items: center;
 justify-content: center;
 gap: 8px;
 font-weight: 600;
 font-size: 0.95rem;
 padding: 10px 22px;
 border-radius: var(--radius-full);
 cursor: pointer;
 transition: all var(--transition-normal);
 border: 1px solid transparent;
 white-space: nowrap;
}

.btn-primary {
 background: linear-gradient(135deg, var(--copper-orange-light), var(--copper-orange));
 color: #FFFFFF !important;
 box-shadow: 0 4px 14px var(--copper-glow);
}

.btn-primary:hover {
 background: linear-gradient(135deg, var(--copper-orange), var(--copper-orange-dark));
 transform: translateY(-2px);
 box-shadow: 0 8px 20px var(--copper-glow);
}

.btn-outline {
 background: var(--bg-surface);
 color: var(--copper-orange) !important;
 border: 1px solid var(--border-light);
 backdrop-filter: blur(8px);
}

.btn-outline:hover {
 background: #FFFFFF;
 border-color: var(--copper-orange);
 transform: translateY(-2px);
 box-shadow: var(--shadow-sm);
}

.btn-mint {
 background: linear-gradient(135deg, var(--mint-green-light), var(--mint-green));
 color: #FFFFFF !important;
 box-shadow: 0 4px 14px var(--mint-glow);
}

.btn-mint:hover {
 transform: translateY(-2px);
 box-shadow: 0 8px 20px var(--mint-glow);
}

.btn-sm {
 padding: 6px 14px;
 font-size: 0.85rem;
}

.btn-lg {
 padding: 14px 32px;
 font-size: 1.05rem;
 letter-spacing: -0.01em;
}

/* 移动端菜单切换按钮 */
.mobile-toggle {
 display: none;
 background: none;
 border: none;
 cursor: pointer;
 padding: 8px;
 color: var(--text-primary);
}

/* 首屏 HERO 区域 */
.hero-section {
 padding: 56px 0 80px;
 position: relative;
 overflow: hidden;
}

.hero-grid {
 display: grid;
 grid-template-columns: 1.15fr 1fr;
 align-items: center;
 gap: 48px;
}

.hero-content {
 position: relative;
 z-index: 2;
}

.hero-pill-badge {
 display: inline-flex;
 align-items: center;
 gap: 8px;
 padding: 6px 16px;
 background: rgba(201, 121, 61, 0.1);
 border: 1px solid rgba(201, 121, 61, 0.25);
 border-radius: var(--radius-full);
 color: var(--copper-orange-dark);
 font-weight: 600;
 font-size: 0.88rem;
 margin-bottom: 22px;
 backdrop-filter: blur(8px);
}

.hero-pill-badge .coin-icon {
 animation: coinSpin 4s infinite ease-in-out;
}

@keyframes coinSpin {
 0%, 100% { transform: rotate(0deg) scale(1); }
 50% { transform: rotate(180deg) scale(1.15); }
}

.hero-title {
 font-size: 3.2rem;
 line-height: 1.18;
 font-weight: 800;
 letter-spacing: -0.03em;
 color: var(--text-primary);
 margin-bottom: 20px;
}

.hero-title .highlight-orange {
 color: var(--copper-orange);
 position: relative;
 display: inline-block;
}

.hero-title .highlight-orange::after {
 content: '';
 position: absolute;
 bottom: 6px;
 left: 0;
 width: 100%;
 height: 10px;
 background: rgba(201, 121, 61, 0.18);
 border-radius: 4px;
 z-index: -1;
}

.hero-subtitle {
 font-size: 1.125rem;
 color: var(--text-secondary);
 line-height: 1.75;
 margin-bottom: 32px;
 max-width: 580px;
}

.hero-cta-group {
 display: flex;
 flex-wrap: wrap;
 align-items: center;
 gap: 16px;
 margin-bottom: 40px;
}

.hero-metrics {
 display: grid;
 grid-template-columns: repeat(3, 1fr);
 gap: 16px;
 padding-top: 24px;
 border-top: 1px dashed rgba(201, 121, 61, 0.25);
}

.metric-item {
 display: flex;
 flex-direction: column;
}

.metric-num {
 font-size: 1.7rem;
 font-weight: 800;
 color: var(--text-primary);
 line-height: 1.2;
}

.metric-num span {
 color: var(--copper-orange);
 font-size: 1rem;
}

.metric-label {
 font-size: 0.82rem;
 color: var(--text-muted);
 font-weight: 500;
 margin-top: 4px;
}

/* 首屏右侧：一分机场 VPN视觉核心与物理交互演示 */
.hero-visual-wrapper {
 position: relative;
 display: flex;
 flex-direction: column;
 align-items: center;
 justify-content: center;
}

.coin-jar-container {
 position: relative;
 width: 100%;
 max-width: 480px;
 background: var(--bg-surface);
 border: 1px solid var(--border-glass);
 border-radius: var(--radius-lg);
 padding: 24px;
 box-shadow: var(--shadow-lg);
 backdrop-filter: blur(20px);
 -webkit-backdrop-filter: blur(20px);
 overflow: hidden;
}

.jar-glow-bg {
 position: absolute;
 top: 50%;
 left: 50%;
 transform: translate(-50%, -50%);
 width: 320px;
 height: 320px;
 background: radial-gradient(circle, rgba(201, 121, 61, 0.18) 0%, rgba(16, 185, 129, 0.12) 50%, transparent 70%);
 border-radius: 50%;
 filter: blur(40px);
 z-index: 0;
 pointer-events: none;
}

.jar-illustration-box {
 position: relative;
 z-index: 1;
 text-align: center;
}

.jar-image {
 width: 100%;
 max-width: 320px;
 height: auto;
 margin: 0 auto;
 display: block;
 filter: drop-shadow(0 14px 28px rgba(201, 121, 61, 0.2));
 animation: floatJar 6s ease-in-out infinite;
}

@keyframes floatJar {
 0%, 100% { transform: translateY(0px); }
 50% { transform: translateY(-8px); }
}

/* 一分机场 VPN交互控制条 */
.jar-interactive-bar {
 position: relative;
 z-index: 2;
 margin-top: 20px;
 background: rgba(255, 255, 255, 0.9);
 border-radius: var(--radius-md);
 padding: 14px 18px;
 border: 1px solid var(--border-light);
 box-shadow: var(--shadow-sm);
}

.jar-bar-header {
 display: flex;
 justify-content: space-between;
 align-items: center;
 font-size: 0.85rem;
 font-weight: 600;
 color: var(--text-secondary);
 margin-bottom: 10px;
}

.node-coin-chips {
 display: flex;
 flex-wrap: wrap;
 gap: 8px;
 margin-bottom: 12px;
}

.node-chip {
 display: inline-flex;
 align-items: center;
 gap: 6px;
 padding: 5px 10px;
 background: #FAF7EF;
 border-radius: var(--radius-full);
 font-size: 0.78rem;
 font-weight: 600;
 border: 1px solid transparent;
 cursor: pointer;
 transition: all var(--transition-fast);
}

.node-chip.hk { border-color: var(--copper-orange); color: var(--copper-orange-dark); }
.node-chip.jp { border-color: #EC4899; color: #BE185D; }
.node-chip.sg { border-color: var(--mint-green); color: #047857; }
.node-chip.us { border-color: var(--bill-blue); color: #1D4ED8; }
.node-chip.eu { border-color: #8B5CF6; color: #6D28D9; }

.node-chip:hover {
 transform: translateY(-2px);
 box-shadow: 0 4px 10px rgba(0, 0, 0, 0.08);
}

/* 测速轨道与滚币模拟交互 */
.speed-track-module {
 margin-top: 10px;
 background: #F3EFE4;
 border-radius: var(--radius-sm);
 padding: 10px 14px;
 border: 1px dashed rgba(201, 121, 61, 0.3);
}

.track-rail {
 position: relative;
 height: 6px;
 background: #E4DDD0;
 border-radius: 4px;
 margin: 12px 0 8px;
 overflow: visible;
}

.track-coin {
 position: absolute;
 top: -10px;
 left: 0%;
 width: 26px;
 height: 26px;
 background: linear-gradient(135deg, #F59E0B, var(--copper-orange));
 border-radius: 50%;
 display: flex;
 align-items: center;
 justify-content: center;
 color: #fff;
 font-size: 11px;
 font-weight: 800;
 box-shadow: var(--shadow-coin);
 transition: left 0.8s cubic-bezier(0.34, 1.56, 0.64, 1);
 border: 2px solid #FFFFFF;
}

.track-result-bar {
 display: flex;
 justify-content: space-between;
 align-items: center;
 font-size: 0.8rem;
 color: var(--text-muted);
}

.status-badge {
 display: inline-flex;
 align-items: center;
 gap: 5px;
 font-weight: 600;
 color: var(--mint-green);
}

.status-badge::before {
 content: '';
 width: 8px;
 height: 8px;
 background: var(--mint-green);
 border-radius: 50%;
 display: inline-block;
 box-shadow: 0 0 8px var(--mint-green);
 animation: pulseGreen 2s infinite;
}

@keyframes pulseGreen {
 0% { transform: scale(0.95); opacity: 0.8; }
 50% { transform: scale(1.3); opacity: 1; }
 100% { transform: scale(0.95); opacity: 0.8; }
}

/* 通用区块头规范 */
.section-header {
 text-align: center;
 max-width: 680px;
 margin: 0 auto 52px;
}

.section-tag {
 display: inline-block;
 font-size: 0.82rem;
 font-weight: 700;
 text-transform: uppercase;
 letter-spacing: 0.08em;
 color: var(--copper-orange);
 background: rgba(201, 121, 61, 0.1);
 padding: 4px 14px;
 border-radius: var(--radius-full);
 margin-bottom: 12px;
 border: 1px solid rgba(201, 121, 61, 0.2);
}

.section-title {
 font-size: 2.3rem;
 font-weight: 800;
 color: var(--text-primary);
 line-height: 1.25;
 letter-spacing: -0.02em;
 margin-bottom: 14px;
}

.section-desc {
 font-size: 1.05rem;
 color: var(--text-secondary);
 line-height: 1.7;
}

/* 核心优势板块 (6大核心价值) */
.features-section {
 padding: 90px 0;
 position: relative;
}

.features-grid {
 display: grid;
 grid-template-columns: repeat(3, 1fr);
 gap: 28px;
}

.feature-card {
 background: var(--bg-surface);
 border: 1px solid var(--border-light);
 border-radius: var(--radius-lg);
 padding: 32px 28px;
 transition: all var(--transition-normal);
 position: relative;
 overflow: hidden;
 backdrop-filter: blur(12px);
 -webkit-backdrop-filter: blur(12px);
}

.feature-card::before {
 content: '';
 position: absolute;
 top: 0;
 left: 0;
 right: 0;
 height: 4px;
 background: linear-gradient(90deg, var(--copper-orange), var(--mint-green));
 opacity: 0;
 transition: opacity var(--transition-fast);
}

.feature-card:hover {
 transform: translateY(-6px);
 border-color: rgba(201, 121, 61, 0.4);
 box-shadow: var(--shadow-lg);
 background: #FFFFFF;
}

.feature-card:hover::before {
 opacity: 1;
}

.feature-icon-box {
 width: 56px;
 height: 56px;
 border-radius: var(--radius-md);
 background: #FAF7EF;
 border: 1px solid var(--border-light);
 display: flex;
 align-items: center;
 justify-content: center;
 font-size: 1.75rem;
 margin-bottom: 20px;
 box-shadow: var(--shadow-sm);
 transition: transform var(--transition-bounce);
}

.feature-card:hover .feature-icon-box {
 transform: scale(1.1) rotate(6deg);
 background: rgba(201, 121, 61, 0.12);
}

.feature-title {
 font-size: 1.25rem;
 font-weight: 700;
 color: var(--text-primary);
 margin-bottom: 12px;
}

.feature-text {
 font-size: 0.94rem;
 color: var(--text-secondary);
 line-height: 1.68;
}

/* 套餐价格板块 (透明价格标签造型) */
.pricing-section {
 padding: 90px 0;
 background: linear-gradient(180deg, transparent, rgba(201, 121, 61, 0.04), transparent);
 position: relative;
}

.pricing-tabs-wrapper {
 display: flex;
 justify-content: center;
 margin-bottom: 48px;
}

.pricing-tabs {
 display: inline-flex;
 padding: 6px;
 background: rgba(243, 239, 228, 0.9);
 border-radius: var(--radius-full);
 border: 1px solid var(--border-light);
 gap: 6px;
}

.pricing-tab-btn {
 padding: 10px 24px;
 border-radius: var(--radius-full);
 border: none;
 background: transparent;
 font-size: 0.92rem;
 font-weight: 600;
 color: var(--text-secondary);
 cursor: pointer;
 transition: all var(--transition-fast);
}

.pricing-tab-btn.active {
 background: #FFFFFF;
 color: var(--copper-orange-dark);
 box-shadow: 0 4px 12px rgba(201, 121, 61, 0.15);
}

/* 透明价格标签造型卡片 */
.pricing-grid {
 display: grid;
 grid-template-columns: repeat(4, 1fr);
 gap: 24px;
 align-items: stretch;
}

.price-tag-card {
 position: relative;
 background: rgba(255, 255, 255, 0.78);
 border: 1px solid var(--border-light);
 border-radius: 20px;
 padding: 32px 24px 28px;
 display: flex;
 flex-direction: column;
 transition: all var(--transition-normal);
 backdrop-filter: blur(16px);
 -webkit-backdrop-filter: blur(16px);
 box-shadow: var(--shadow-md);
}

/* 标签吊孔拟物点缀 */
.price-tag-card::after {
 content: '';
 position: absolute;
 top: 14px;
 right: 18px;
 width: 14px;
 height: 14px;
 border-radius: 50%;
 background: #FAF7EF;
 border: 2px solid rgba(201, 121, 61, 0.25);
 box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.08);
}

.price-tag-card:hover {
 transform: translateY(-8px);
 border-color: var(--copper-orange);
 box-shadow: var(--shadow-lg);
 background: #FFFFFF;
}

.price-tag-card.popular {
 border: 2px solid var(--copper-orange);
 background: rgba(255, 255, 255, 0.94);
 transform: scale(1.03);
}

.price-tag-card.popular:hover {
 transform: scale(1.03) translateY(-8px);
}

.popular-badge {
 position: absolute;
 top: -13px;
 left: 50%;
 transform: translateX(-50%);
 background: linear-gradient(135deg, var(--copper-orange-light), var(--copper-orange));
 color: #fff;
 font-size: 0.75rem;
 font-weight: 700;
 padding: 4px 14px;
 border-radius: var(--radius-full);
 box-shadow: 0 4px 10px var(--copper-glow);
 white-space: nowrap;
}

.plan-header {
 margin-bottom: 20px;
 padding-bottom: 16px;
 border-bottom: 1px dashed rgba(201, 121, 61, 0.2);
}

.plan-name {
 font-size: 1.25rem;
 font-weight: 800;
 color: var(--text-primary);
 margin-bottom: 6px;
}

.plan-target {
 font-size: 0.82rem;
 color: var(--text-muted);
}

/* 透明价格数据区 (月均成本、每GB单价、总价明确) */
.plan-pricing-box {
 margin-bottom: 22px;
}

.price-main {
 display: flex;
 align-items: baseline;
 gap: 4px;
 margin-bottom: 8px;
}

.price-currency {
 font-size: 1.25rem;
 font-weight: 700;
 color: var(--copper-orange);
}

.price-amount {
 font-size: 2.8rem;
 font-weight: 800;
 color: var(--text-primary);
 line-height: 1;
 letter-spacing: -0.03em;
}

.price-period {
 font-size: 0.9rem;
 color: var(--text-muted);
}

.price-breakdown {
 display: flex;
 flex-direction: column;
 gap: 4px;
 background: #FAF7EF;
 border-radius: var(--radius-sm);
 padding: 8px 12px;
 border: 1px solid rgba(201, 121, 61, 0.12);
}

.breakdown-row {
 display: flex;
 justify-content: space-between;
 font-size: 0.78rem;
 color: var(--text-secondary);
}

.breakdown-row strong {
 color: var(--copper-orange-dark);
}

.plan-features-list {
 list-style: none;
 margin-bottom: 26px;
 flex-grow: 1;
}

.plan-feature-item {
 display: flex;
 align-items: center;
 gap: 8px;
 font-size: 0.88rem;
 color: var(--text-secondary);
 margin-bottom: 10px;
}

.plan-feature-item svg {
 flex-shrink: 0;
 color: var(--mint-green);
}

.plan-cta-btn {
 width: 100%;
 margin-top: auto;
}

/* 适合人群板块 */
.audience-section {
 padding: 80px 0;
}

.audience-grid {
 display: grid;
 grid-template-columns: repeat(3, 1fr);
 gap: 24px;
}

.audience-card {
 background: var(--bg-surface);
 border: 1px solid var(--border-light);
 border-radius: var(--radius-lg);
 padding: 28px;
 display: flex;
 gap: 18px;
 align-items: flex-start;
 transition: all var(--transition-normal);
}

.audience-card:hover {
 transform: translateY(-4px);
 background: #FFFFFF;
 box-shadow: var(--shadow-md);
 border-color: rgba(201, 121, 61, 0.3);
}

.audience-emoji {
 width: 48px;
 height: 48px;
 border-radius: var(--radius-md);
 background: #FAF7EF;
 display: flex;
 align-items: center;
 justify-content: center;
 font-size: 1.6rem;
 flex-shrink: 0;
 box-shadow: var(--shadow-sm);
}

.audience-info h3 {
 font-size: 1.15rem;
 font-weight: 700;
 color: var(--text-primary);
 margin-bottom: 6px;
}

.audience-info p {
 font-size: 0.9rem;
 color: var(--text-secondary);
 line-height: 1.6;
}

/* Clash 与 Clash Party 教程板块 */
.tutorials-section {
 padding: 90px 0;
 background: #F4EFE6;
 position: relative;
}

.tutorial-card-wrapper {
 background: #FFFFFF;
 border-radius: var(--radius-lg);
 border: 1px solid var(--border-light);
 box-shadow: var(--shadow-lg);
 overflow: hidden;
}

.tutorial-tabs-header {
 display: flex;
 border-bottom: 1px solid var(--border-subtle);
 background: #FAF7EF;
 overflow-x: auto;
}

.tutorial-tab-btn {
 display: inline-flex;
 align-items: center;
 gap: 8px;
 padding: 16px 28px;
 font-size: 0.95rem;
 font-weight: 600;
 color: var(--text-secondary);
 border: none;
 background: transparent;
 cursor: pointer;
 border-bottom: 3px solid transparent;
 transition: all var(--transition-fast);
 white-space: nowrap;
}

.tutorial-tab-btn.active {
 color: var(--copper-orange);
 border-bottom-color: var(--copper-orange);
 background: #FFFFFF;
}

.tutorial-content-pane {
 display: none;
 padding: 40px;
}

.tutorial-content-pane.active {
 display: block;
}

.tutorial-grid {
 display: grid;
 grid-template-columns: 1.1fr 1fr;
 gap: 40px;
 align-items: center;
}

.steps-timeline {
 display: flex;
 flex-direction: column;
 gap: 22px;
}

.step-item {
 display: flex;
 gap: 16px;
}

.step-num {
 width: 34px;
 height: 34px;
 border-radius: 50%;
 background: var(--copper-orange);
 color: #fff;
 display: flex;
 align-items: center;
 justify-content: center;
 font-weight: 800;
 font-size: 0.9rem;
 flex-shrink: 0;
 box-shadow: 0 4px 10px var(--copper-glow);
}

.step-body h4 {
 font-size: 1.05rem;
 font-weight: 700;
 color: var(--text-primary);
 margin-bottom: 4px;
}

.step-body p {
 font-size: 0.9rem;
 color: var(--text-secondary);
 line-height: 1.6;
}

.tutorial-visual-side {
 background: #FAF7EF;
 border-radius: var(--radius-md);
 padding: 20px;
 border: 1px solid var(--border-light);
 text-align: center;
}

.tutorial-visual-side img {
 width: 100%;
 border-radius: var(--radius-sm);
 box-shadow: var(--shadow-md);
 margin-bottom: 14px;
}

/* 测速演示与节点状态板块 */
.nodes-section {
 padding: 90px 0;
}

.node-table-container {
 background: var(--bg-surface);
 border: 1px solid var(--border-light);
 border-radius: var(--radius-lg);
 overflow: hidden;
 box-shadow: var(--shadow-md);
 backdrop-filter: blur(16px);
}

.node-table {
 width: 100%;
 border-collapse: collapse;
 text-align: left;
}

.node-table th {
 background: #F3EFE4;
 padding: 16px 20px;
 font-size: 0.85rem;
 font-weight: 700;
 color: var(--text-secondary);
 text-transform: uppercase;
 letter-spacing: 0.04em;
 border-bottom: 1px solid var(--border-light);
}

.node-table td {
 padding: 16px 20px;
 font-size: 0.92rem;
 border-bottom: 1px solid var(--border-subtle);
 color: var(--text-primary);
}

.node-table tr:last-child td {
 border-bottom: none;
}

.node-table tr:hover td {
 background: rgba(255, 255, 255, 0.7);
}

.node-tag {
 display: inline-flex;
 align-items: center;
 gap: 6px;
 padding: 3px 10px;
 border-radius: var(--radius-full);
 font-size: 0.8rem;
 font-weight: 600;
}

.node-tag.iepl {
 background: rgba(201, 121, 61, 0.12);
 color: var(--copper-orange-dark);
}

.node-tag.bgp {
 background: rgba(37, 99, 235, 0.1);
 color: var(--bill-blue);
}

/* 用户评价板块 */
.testimonials-section {
 padding: 90px 0;
 background: linear-gradient(180deg, transparent, rgba(201, 121, 61, 0.03), transparent);
}

.testimonials-grid {
 display: grid;
 grid-template-columns: repeat(3, 1fr);
 gap: 24px;
}

.testimonial-card {
 background: var(--bg-surface);
 border: 1px solid var(--border-light);
 border-radius: var(--radius-lg);
 padding: 28px;
 backdrop-filter: blur(14px);
 -webkit-backdrop-filter: blur(14px);
 box-shadow: var(--shadow-sm);
 display: flex;
 flex-direction: column;
 transition: all var(--transition-normal);
}

.testimonial-card:hover {
 transform: translateY(-4px);
 background: #FFFFFF;
 box-shadow: var(--shadow-md);
 border-color: rgba(201, 121, 61, 0.35);
}

.testimonial-header {
 display: flex;
 align-items: center;
 gap: 12px;
 margin-bottom: 16px;
}

.user-avatar {
 width: 44px;
 height: 44px;
 border-radius: 50%;
 background: linear-gradient(135deg, var(--copper-orange-light), var(--copper-orange));
 color: #fff;
 font-weight: 700;
 display: flex;
 align-items: center;
 justify-content: center;
 font-size: 1rem;
}

.user-meta h4 {
 font-size: 0.98rem;
 font-weight: 700;
 color: var(--text-primary);
}

.user-meta span {
 font-size: 0.8rem;
 color: var(--text-muted);
}

.star-rating {
 color: #F59E0B;
 font-size: 0.85rem;
 margin-bottom: 12px;
}

.testimonial-text {
 font-size: 0.92rem;
 color: var(--text-secondary);
 line-height: 1.68;
 flex-grow: 1;
}

/* 常见问题 (FAQ 手风琴) */
.faq-section {
 padding: 90px 0;
}

.faq-container {
 max-width: 820px;
 margin: 0 auto;
}

.faq-accordion {
 display: flex;
 flex-direction: column;
 gap: 14px;
}

.faq-item {
 background: var(--bg-surface);
 border: 1px solid var(--border-light);
 border-radius: var(--radius-md);
 overflow: hidden;
 transition: all var(--transition-fast);
}

.faq-item.active {
 border-color: var(--copper-orange);
 background: #FFFFFF;
 box-shadow: var(--shadow-sm);
}

.faq-question {
 width: 100%;
 text-align: left;
 padding: 20px 24px;
 background: none;
 border: none;
 display: flex;
 justify-content: space-between;
 align-items: center;
 cursor: pointer;
 font-size: 1.05rem;
 font-weight: 700;
 color: var(--text-primary);
 font-family: inherit;
}

.faq-icon {
 width: 24px;
 height: 24px;
 border-radius: 50%;
 background: #FAF7EF;
 border: 1px solid var(--border-light);
 display: flex;
 align-items: center;
 justify-content: center;
 font-size: 1.1rem;
 color: var(--copper-orange);
 transition: transform var(--transition-normal);
 flex-shrink: 0;
}

.faq-item.active .faq-icon {
 transform: rotate(45deg);
 background: var(--copper-orange);
 color: #fff;
}

.faq-answer {
 max-height: 0;
 overflow: hidden;
 transition: max-height 0.4s ease, padding 0.3s ease;
 padding: 0 24px;
 color: var(--text-secondary);
 font-size: 0.95rem;
 line-height: 1.75;
}

.faq-item.active .faq-answer {
 max-height: 480px;
 padding: 0 24px 22px;
}

/* 首页文章目录精选 */
.articles-preview-section {
 padding: 90px 0;
 background: #F5EFE4;
}

.articles-grid {
 display: grid;
 grid-template-columns: repeat(3, 1fr);
 gap: 28px;
}

.article-card {
 background: #FFFFFF;
 border-radius: var(--radius-lg);
 border: 1px solid var(--border-light);
 padding: 26px;
 display: flex;
 flex-direction: column;
 box-shadow: var(--shadow-sm);
 transition: all var(--transition-normal);
}

.article-card:hover {
 transform: translateY(-6px);
 box-shadow: var(--shadow-lg);
 border-color: var(--copper-orange);
}

.article-category {
 display: inline-block;
 font-size: 0.75rem;
 font-weight: 700;
 color: var(--copper-orange-dark);
 background: rgba(201, 121, 61, 0.12);
 padding: 3px 10px;
 border-radius: var(--radius-full);
 margin-bottom: 12px;
 align-self: flex-start;
}

.article-card-title {
 font-size: 1.15rem;
 font-weight: 700;
 color: var(--text-primary);
 line-height: 1.45;
 margin-bottom: 10px;
}

.article-card-title a {
 color: inherit;
}

.article-card-title a:hover {
 color: var(--copper-orange);
}

.article-card-snippet {
 font-size: 0.88rem;
 color: var(--text-secondary);
 line-height: 1.65;
 margin-bottom: 18px;
 flex-grow: 1;
}

.article-card-footer {
 display: flex;
 justify-content: space-between;
 align-items: center;
 font-size: 0.8rem;
 color: var(--text-muted);
 border-top: 1px solid var(--border-subtle);
 padding-top: 14px;
}

.read-more-link {
 font-weight: 600;
 color: var(--copper-orange);
 display: inline-flex;
 align-items: center;
 gap: 4px;
}

.read-more-link:hover {
 gap: 8px;
}

/* 底栏 CTA 转换卡片 */
.bottom-cta-section {
 padding: 60px 0 100px;
}

.cta-banner {
 background: linear-gradient(135deg, #1A1D20, #2C2F36);
 border-radius: var(--radius-lg);
 padding: 56px 48px;
 color: #FFFFFF;
 position: relative;
 overflow: hidden;
 box-shadow: var(--shadow-lg);
 display: flex;
 justify-content: space-between;
 align-items: center;
 gap: 32px;
}

.cta-banner::before {
 content: '';
 position: absolute;
 top: -50%;
 right: -10%;
 width: 400px;
 height: 400px;
 background: radial-gradient(circle, rgba(201, 121, 61, 0.35) 0%, transparent 70%);
 border-radius: 50%;
 pointer-events: none;
}

.cta-banner-content h2 {
 font-size: 2.2rem;
 font-weight: 800;
 line-height: 1.25;
 margin-bottom: 12px;
}

.cta-banner-content p {
 color: #D1D5DB;
 font-size: 1.05rem;
 max-width: 580px;
}

/* 页脚 Footer */
.site-footer {
 background: #14171A;
 color: #9CA3AF;
 padding: 70px 0 36px;
 border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.footer-grid {
 display: grid;
 grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
 gap: 40px;
 margin-bottom: 48px;
}

.footer-col h4 {
 color: #FFFFFF;
 font-size: 1rem;
 font-weight: 700;
 margin-bottom: 18px;
 letter-spacing: -0.01em;
}

.footer-links {
 list-style: none;
 display: flex;
 flex-direction: column;
 gap: 10px;
}

.footer-links a {
 color: #9CA3AF;
 font-size: 0.9rem;
 transition: color var(--transition-fast);
}

.footer-links a:hover {
 color: var(--copper-orange-light);
}

.footer-bottom {
 border-top: 1px solid rgba(255, 255, 255, 0.08);
 padding-top: 28px;
 display: flex;
 justify-content: space-between;
 align-items: center;
 font-size: 0.85rem;
}

/* 文章详情页专用排版样式 (Article Layout) */
.article-page-header {
 padding: 48px 0 32px;
 background: #F4EFE6;
 border-bottom: 1px solid var(--border-light);
}

.breadcrumb {
 display: flex;
 flex-wrap: wrap;
 align-items: center;
 gap: 8px;
 font-size: 0.85rem;
 color: var(--text-muted);
 margin-bottom: 18px;
}

.breadcrumb a {
 color: var(--text-secondary);
}

.breadcrumb a:hover {
 color: var(--copper-orange);
}

.article-header-title {
 font-size: 2.5rem;
 font-weight: 800;
 color: var(--text-primary);
 line-height: 1.25;
 margin-bottom: 16px;
}

.article-header-meta {
 display: flex;
 flex-wrap: wrap;
 gap: 18px;
 font-size: 0.88rem;
 color: var(--text-muted);
}

.article-header-meta span {
 display: inline-flex;
 align-items: center;
 gap: 6px;
}

.article-main-layout {
 padding: 60px 0 80px;
}

.article-content-grid {
 display: grid;
 grid-template-columns: 1fr 300px;
 gap: 48px;
}

.article-body {
 font-size: 1.05rem;
 line-height: 1.85;
 color: #2D3748;
}

.article-body h2 {
 font-size: 1.65rem;
 font-weight: 800;
 color: var(--text-primary);
 margin: 40px 0 16px;
 padding-bottom: 8px;
 border-bottom: 2px solid rgba(201, 121, 61, 0.2);
}

.article-body h3 {
 font-size: 1.3rem;
 font-weight: 700;
 color: var(--text-primary);
 margin: 28px 0 12px;
}

.article-body p {
 margin-bottom: 20px;
}

.article-body ul, .article-body ol {
 margin: 0 0 24px 24px;
}

.article-body li {
 margin-bottom: 8px;
}

.article-body blockquote {
 border-left: 4px solid var(--copper-orange);
 padding: 16px 20px;
 background: #FAF7EF;
 border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
 margin: 24px 0;
 font-style: italic;
 color: var(--text-secondary);
}

.article-body table {
 width: 100%;
 border-collapse: collapse;
 margin: 28px 0;
 border-radius: var(--radius-sm);
 overflow: hidden;
 box-shadow: var(--shadow-sm);
}

.article-body th {
 background: #F3EFE4;
 padding: 12px 16px;
 font-weight: 700;
 text-align: left;
 border-bottom: 2px solid var(--border-light);
}

.article-body td {
 padding: 12px 16px;
 border-bottom: 1px solid var(--border-subtle);
 background: #FFFFFF;
}

.article-sidebar {
 display: flex;
 flex-direction: column;
 gap: 24px;
}

.sidebar-widget {
 background: #FFFFFF;
 border: 1px solid var(--border-light);
 border-radius: var(--radius-md);
 padding: 22px;
 box-shadow: var(--shadow-sm);
}

.sidebar-widget h4 {
 font-size: 1.05rem;
 font-weight: 700;
 margin-bottom: 14px;
 color: var(--text-primary);
 border-bottom: 1px solid var(--border-subtle);
 padding-bottom: 8px;
}

/* 响应式断点适配 */
@media (max-width: 1024px) {
 .hero-grid {
 grid-template-columns: 1fr;
 gap: 40px;
 }

 .features-grid,
 .pricing-grid,
 .audience-grid,
 .testimonials-grid,
 .articles-grid {
 grid-template-columns: repeat(2, 1fr);
 }

 .tutorial-grid {
 grid-template-columns: 1fr;
 }

 .article-content-grid {
 grid-template-columns: 1fr;
 }

 .footer-grid {
 grid-template-columns: repeat(2, 1fr);
 }
}

@media (max-width: 768px) {
 .navbar-container {
 height: 64px;
 }

 .mobile-toggle {
 display: block;
 }

 .nav-links {
 display: none;
 position: absolute;
 top: 64px;
 left: 0;
 right: 0;
 background: #FAF7EF;
 border-bottom: 1px solid var(--border-light);
 flex-direction: column;
 padding: 20px;
 gap: 16px;
 box-shadow: var(--shadow-lg);
 }

 .nav-links.show {
 display: flex;
 }

 .hero-title {
 font-size: 2.2rem;
 }

 .hero-subtitle {
 font-size: 1rem;
 }

 .hero-metrics {
 grid-template-columns: 1fr;
 gap: 12px;
 }

 .features-grid,
 .pricing-grid,
 .audience-grid,
 .testimonials-grid,
 .articles-grid {
 grid-template-columns: 1fr;
 }

 .cta-banner {
 flex-direction: column;
 text-align: center;
 padding: 40px 24px;
 }

 .footer-grid {
 grid-template-columns: 1fr;
 }

 .footer-bottom {
 flex-direction: column;
 gap: 12px;
 text-align: center;
 }
}