/* ==========================================================================
   西部数据官网 (westdatavpn.my) - 浅色企业级云数据中心与高速专线主题样式表
   Theme: WestData Light Cloud & Western Horizon Fiber Network
   ========================================================================== */

:root {
    --bg-primary: #F8FAFC;
    --bg-secondary: #F1F5F9;
    --bg-card: rgba(255, 255, 255, 0.90);
    --bg-card-solid: #FFFFFF;
    --bg-glass: rgba(255, 255, 255, 0.82);

    --wd-blue: #0052D9;
    --wd-blue-dark: #003CAB;
    --wd-blue-light: #EFF6FF;
    --wd-cyan: #0284C7;
    --wd-teal: #06B6D4;
    --wd-gold: #F59E0B;
    --wd-gold-dark: #D97706;
    --wd-gold-light: #FEF3C7;

    --text-primary: #0F172A;
    --text-secondary: #334155;
    --text-muted: #64748B;

    --border-color: rgba(148, 163, 184, 0.25);
    --border-highlight: rgba(2, 132, 199, 0.38);

    --status-good: #10B981;
    --status-good-bg: #ECFDF5;
    --status-warn: #F59E0B;
    --status-warn-bg: #FFFBEB;

    --shadow-sm: 0 2px 8px rgba(15, 23, 42, 0.04);
    --shadow-md: 0 10px 30px -5px rgba(15, 23, 42, 0.07), 0 4px 12px -2px rgba(2, 132, 199, 0.05);
    --shadow-lg: 0 20px 45px -10px rgba(0, 82, 217, 0.12), 0 8px 20px -4px rgba(15, 23, 42, 0.06);
    --shadow-gold: 0 12px 32px -6px rgba(245, 158, 11, 0.22);

    --radius-sm: 8px;
    --radius-md: 14px;
    --radius-lg: 20px;
    --radius-xl: 28px;
    --transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: 84px;
    font-size: 16px;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
    background-color: var(--bg-primary);
    background-image: url('../images/westdata-bg.svg');
    background-attachment: fixed;
    background-size: cover;
    background-position: center top;
    color: var(--text-primary);
    line-height: 1.65;
    overflow-x: hidden;
    position: relative;
}

/* 动态粒子画布与点缀光晕 */
#data-canvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    pointer-events: none;
}

.ambient-orb {
    position: fixed;
    border-radius: 50%;
    filter: blur(80px);
    z-index: 0;
    pointer-events: none;
    animation: floatOrb 14s ease-in-out infinite alternate;
}

.ambient-orb-1 {
    width: 460px;
    height: 460px;
    background: radial-gradient(circle, rgba(2, 132, 199, 0.12) 0%, rgba(6, 182, 212, 0) 70%);
    top: -100px;
    right: -80px;
}

.ambient-orb-2 {
    width: 420px;
    height: 420px;
    background: radial-gradient(circle, rgba(245, 158, 11, 0.10) 0%, rgba(251, 191, 36, 0) 70%);
    bottom: 8%;
    left: -120px;
    animation-delay: -6s;
}

@keyframes floatOrb {
    0% { transform: translate(0, 0) scale(1); }
    100% { transform: translate(35px, 28px) scale(1.08); }
}

a {
    color: var(--wd-blue);
    text-decoration: none;
    transition: var(--transition);
}

a:hover {
    color: var(--wd-cyan);
}

.container {
    width: 100%;
    max-width: 1240px;
    margin: 0 auto;
    padding: 0 24px;
    position: relative;
    z-index: 2;
}

/* ==========================================================================
   顶部导航栏 (Header & Navigation)
   ========================================================================== */
.navbar {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.86);
    backdrop-filter: blur(18px);
    -webkit-backdrop-filter: blur(18px);
    border-bottom: 1px solid var(--border-color);
    box-shadow: 0 4px 20px rgba(15, 23, 42, 0.04);
    transition: var(--transition);
}

.nav-wrapper {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 76px;
    gap: 16px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-weight: 800;
    font-size: 1.32rem;
    color: var(--text-primary);
    letter-spacing: -0.02em;
}

.logo-icon {
    width: 42px;
    height: 42px;
    border-radius: 12px;
    background: linear-gradient(135deg, var(--wd-blue) 0%, var(--wd-cyan) 65%, var(--wd-teal) 100%);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    box-shadow: 0 6px 16px rgba(0, 82, 217, 0.26);
    position: relative;
}

.logo-icon::after {
    content: "";
    position: absolute;
    bottom: -2px;
    right: -2px;
    width: 11px;
    height: 11px;
    background: var(--wd-gold);
    border: 2px solid #fff;
    border-radius: 50%;
}

.logo-sub {
    display: block;
    font-size: 0.72rem;
    font-weight: 600;
    color: var(--wd-cyan);
    letter-spacing: 0.03em;
    margin-top: -3px;
}

.nav-links {
    display: flex;
    align-items: center;
    list-style: none;
    gap: 6px;
}

.nav-link {
    padding: 8px 14px;
    border-radius: 999px;
    font-size: 0.94rem;
    font-weight: 600;
    color: var(--text-secondary);
    transition: var(--transition);
}

.nav-link:hover,
.nav-link.active {
    color: var(--wd-blue);
    background: var(--wd-blue-light);
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: 12px;
}

.mobile-toggle {
    display: none;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    width: 40px;
    height: 40px;
    border-radius: 10px;
    font-size: 1.1rem;
    cursor: pointer;
}

/* ==========================================================================
   按钮组件 (Buttons)
   ========================================================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    font-weight: 700;
    border-radius: 999px;
    cursor: pointer;
    transition: var(--transition);
    border: 1.5px solid transparent;
    text-decoration: none;
    white-space: nowrap;
}

.btn-sm {
    padding: 9px 18px;
    font-size: 0.88rem;
}

.btn-md {
    padding: 12px 24px;
    font-size: 0.95rem;
}

.btn-lg {
    padding: 15px 32px;
    font-size: 1.05rem;
}

.btn-primary {
    background: linear-gradient(135deg, var(--wd-blue) 0%, var(--wd-cyan) 100%);
    color: #fff !important;
    box-shadow: 0 8px 22px rgba(0, 82, 217, 0.25);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 28px rgba(0, 82, 217, 0.36);
    filter: brightness(1.05);
}

.btn-gold {
    background: linear-gradient(135deg, var(--wd-gold) 0%, var(--wd-gold-dark) 100%);
    color: #fff !important;
    box-shadow: var(--shadow-gold);
}

.btn-gold:hover {
    transform: translateY(-2px);
    filter: brightness(1.05);
}

.btn-outline {
    background: rgba(255, 255, 255, 0.85);
    color: var(--wd-blue) !important;
    border-color: rgba(0, 82, 217, 0.28);
    box-shadow: var(--shadow-sm);
}

.btn-outline:hover {
    background: var(--wd-blue-light);
    border-color: var(--wd-blue);
    transform: translateY(-2px);
}

/* ==========================================================================
   通用板块标题与徽章 (Section Headers & Badges)
   ========================================================================== */
section {
    padding: 88px 0;
    position: relative;
}

.section-header {
    text-align: center;
    max-width: 760px;
    margin: 0 auto 54px;
}

.badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 16px;
    border-radius: 999px;
    background: linear-gradient(90deg, rgba(0, 82, 217, 0.09) 0%, rgba(245, 158, 11, 0.12) 100%);
    border: 1px solid rgba(2, 132, 199, 0.22);
    color: var(--wd-blue);
    font-size: 0.85rem;
    font-weight: 700;
    margin-bottom: 16px;
}

.badge-pulse {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--status-good);
    box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7);
    animation: pulseDot 2s infinite;
}

@keyframes pulseDot {
    0% { box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.65); }
    70% { box-shadow: 0 0 0 9px rgba(16, 185, 129, 0); }
    100% { box-shadow: 0 0 0 0 rgba(16, 185, 129, 0); }
}

.section-title {
    font-size: 2.25rem;
    font-weight: 850;
    color: var(--text-primary);
    letter-spacing: -0.02em;
    margin-bottom: 14px;
    line-height: 1.25;
}

.section-subtitle {
    font-size: 1.06rem;
    color: var(--text-secondary);
}

.text-gradient {
    background: linear-gradient(120deg, var(--wd-blue) 0%, var(--wd-cyan) 55%, var(--wd-gold-dark) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.wd-tag {
    display: inline-block;
    padding: 2px 10px;
    border-radius: 999px;
    font-size: 0.75rem;
    font-weight: 700;
    background: var(--wd-blue-light);
    color: var(--wd-blue);
    border: 1px solid rgba(0, 82, 217, 0.18);
}

.wd-tag-gold {
    background: var(--wd-gold-light);
    color: var(--wd-gold-dark);
    border: 1px solid rgba(245, 158, 11, 0.3);
}

/* ==========================================================================
   1. 首屏板块 (Hero Section + 动态数据中心点缀)
   ========================================================================== */
.hero {
    padding: 72px 0 84px;
    position: relative;
    overflow: hidden;
}

.hero-grid {
    display: grid;
    grid-template-columns: 1.15fr 0.85fr;
    gap: 44px;
    align-items: center;
}

.hero-title {
    font-size: 3.1rem;
    font-weight: 900;
    line-height: 1.18;
    letter-spacing: -0.03em;
    margin-bottom: 20px;
    color: var(--text-primary);
}

.hero-description {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-bottom: 28px;
    max-width: 620px;
}

.hero-cta {
    display: flex;
    flex-wrap: wrap;
    gap: 14px;
    margin-bottom: 34px;
}

.hero-trust-chips {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
}

.trust-chip {
    display: inline-flex;
    align-items: center;
    gap: 7px;
    padding: 7px 14px;
    background: rgba(255, 255, 255, 0.85);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-secondary);
    box-shadow: var(--shadow-sm);
}

.trust-chip i {
    color: var(--wd-blue);
}

/* 右侧动态西部数据中心拓扑仪表卡片 */
.hero-visual-card {
    background: var(--bg-card);
    backdrop-filter: blur(16px);
    border: 1px solid var(--border-highlight);
    border-radius: var(--radius-xl);
    padding: 28px;
    box-shadow: var(--shadow-lg);
    position: relative;
}

.floating-badge {
    position: absolute;
    background: #fff;
    border: 1px solid var(--border-color);
    border-radius: 14px;
    padding: 10px 16px;
    display: flex;
    align-items: center;
    gap: 10px;
    box-shadow: var(--shadow-md);
    font-size: 0.82rem;
    font-weight: 700;
    z-index: 3;
    animation: floatBadge 4s ease-in-out infinite alternate;
}

.floating-badge-top {
    top: -18px;
    right: 22px;
}

.floating-badge-bottom {
    bottom: -18px;
    left: 22px;
    animation-delay: -2s;
}

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

.datacenter-monitor-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-bottom: 16px;
    margin-bottom: 18px;
    border-bottom: 1px solid var(--border-color);
}

.dc-dots {
    display: flex;
    gap: 6px;
}

.dc-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
}

.dc-route-visual {
    background: linear-gradient(135deg, #F0F9FF 0%, #FFFBEB 100%);
    border: 1px solid rgba(2, 132, 199, 0.18);
    border-radius: var(--radius-md);
    padding: 18px;
    margin-bottom: 18px;
}

.route-flow {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
    margin: 12px 0;
}

.route-node {
    text-align: center;
    background: #fff;
    padding: 10px 12px;
    border-radius: 12px;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
    flex: 1;
}

.route-node strong {
    display: block;
    font-size: 0.86rem;
    color: var(--text-primary);
}

.route-node span {
    font-size: 0.75rem;
    color: var(--text-muted);
}

.route-line {
    flex: 0.8;
    height: 3px;
    background: rgba(2, 132, 199, 0.2);
    border-radius: 999px;
    position: relative;
    overflow: hidden;
}

.route-line::after {
    content: "";
    position: absolute;
    top: 0;
    left: -40%;
    width: 45%;
    height: 100%;
    background: linear-gradient(90deg, transparent, var(--wd-blue), var(--wd-gold), transparent);
    animation: packetFlow 1.8s linear infinite;
}

@keyframes packetFlow {
    0% { left: -45%; }
    100% { left: 100%; }
}

.dc-mini-metrics {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
}

.dc-mini-box {
    background: var(--bg-secondary);
    padding: 12px 14px;
    border-radius: 12px;
    border: 1px solid var(--border-color);
}

.dc-mini-box .label {
    font-size: 0.76rem;
    color: var(--text-muted);
}

.dc-mini-box .val {
    font-size: 1.15rem;
    font-weight: 800;
    color: var(--wd-blue);
    margin-top: 2px;
}

/* 统计横幅 */
.hero-stats {
    margin-top: 52px;
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}

.stat-item {
    background: var(--bg-card);
    backdrop-filter: blur(12px);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 22px 24px;
    text-align: center;
    box-shadow: var(--shadow-md);
    transition: var(--transition);
}

.stat-item:hover {
    transform: translateY(-4px);
    border-color: var(--wd-cyan);
}

.stat-number {
    font-size: 2rem;
    font-weight: 900;
    background: linear-gradient(135deg, var(--wd-blue), var(--wd-cyan));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-label {
    font-size: 0.9rem;
    color: var(--text-secondary);
    font-weight: 600;
    margin-top: 4px;
}

/* ==========================================================================
   2. 核心优势板块 (Core Advantages)
   ========================================================================== */
.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 26px;
}

.feature-card {
    background: var(--bg-card);
    backdrop-filter: blur(12px);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 32px 28px;
    box-shadow: var(--shadow-md);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.feature-card::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: linear-gradient(90deg, var(--wd-blue), var(--wd-cyan), var(--wd-gold));
    opacity: 0.75;
    transition: var(--transition);
}

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

.feature-card:hover::before {
    opacity: 1;
    height: 5px;
}

.feature-icon {
    width: 54px;
    height: 54px;
    border-radius: 14px;
    background: linear-gradient(135deg, var(--wd-blue-light) 0%, #E0F2FE 100%);
    color: var(--wd-blue);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.45rem;
    margin-bottom: 18px;
    border: 1px solid rgba(2, 132, 199, 0.2);
}

.feature-title {
    font-size: 1.24rem;
    font-weight: 800;
    margin: 10px 0 12px;
    color: var(--text-primary);
}

.feature-desc {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.7;
}

/* ==========================================================================
   3. 节点延迟和状态板块 (Node Latency & Status)
   ========================================================================== */
.node-status-card {
    background: var(--bg-card-solid);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    padding: 32px;
    box-shadow: var(--shadow-lg);
}

.node-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 16px;
    margin-bottom: 24px;
    padding-bottom: 20px;
    border-bottom: 1px solid var(--border-color);
}

.node-filter-tabs {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.node-tab-btn {
    padding: 7px 15px;
    border-radius: 999px;
    border: 1px solid var(--border-color);
    background: var(--bg-secondary);
    color: var(--text-secondary);
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
}

.node-tab-btn.active,
.node-tab-btn:hover {
    background: var(--wd-blue);
    color: #fff;
    border-color: var(--wd-blue);
}

.node-table-wrapper {
    overflow-x: auto;
}

.node-table {
    width: 100%;
    border-collapse: collapse;
    min-width: 760px;
}

.node-table th {
    text-align: left;
    padding: 14px 16px;
    background: var(--bg-secondary);
    color: var(--text-secondary);
    font-size: 0.86rem;
    font-weight: 700;
    border-bottom: 1px solid var(--border-color);
}

.node-table th:first-child { border-top-left-radius: 10px; }
.node-table th:last-child { border-top-right-radius: 10px; }

.node-table td {
    padding: 16px;
    border-bottom: 1px solid var(--border-color);
    font-size: 0.94rem;
    color: var(--text-primary);
}

.node-table tr:hover td {
    background: #F8FAFC;
}

.node-flag-info {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 700;
}

.node-flag {
    font-size: 1.35rem;
}

.latency-badge {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    padding: 4px 12px;
    border-radius: 999px;
    font-weight: 700;
    font-size: 0.84rem;
}

.latency-good {
    background: var(--status-good-bg);
    color: var(--status-good);
    border: 1px solid rgba(16, 185, 129, 0.25);
}

.latency-medium {
    background: var(--status-warn-bg);
    color: var(--wd-gold-dark);
    border: 1px solid rgba(245, 158, 11, 0.3);
}

.load-bar-wrapper {
    display: flex;
    align-items: center;
    gap: 10px;
}

.load-bar-bg {
    width: 110px;
    height: 8px;
    background: var(--bg-secondary);
    border-radius: 999px;
    overflow: hidden;
}

.load-bar-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--wd-blue), var(--wd-teal));
    border-radius: 999px;
    transition: width 0.5s ease;
}

.status-online {
    display: inline-flex;
    align-items: center;
    gap: 7px;
    color: var(--status-good);
    font-weight: 700;
    font-size: 0.88rem;
}

.status-dot {
    width: 8px;
    height: 8px;
    background: var(--status-good);
    border-radius: 50%;
    box-shadow: 0 0 8px rgba(16, 185, 129, 0.6);
}

/* ==========================================================================
   4. 套餐价格板块 (Pricing Section - 100% 匹配上传图片)
   ========================================================================== */
.pricing-cycle-switcher {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 10px;
    margin-bottom: 40px;
    flex-wrap: wrap;
}

.cycle-btn {
    padding: 10px 24px;
    border-radius: 999px;
    border: 1.5px solid var(--border-color);
    background: #fff;
    color: var(--text-secondary);
    font-weight: 700;
    font-size: 0.95rem;
    cursor: pointer;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.cycle-btn.active {
    background: linear-gradient(135deg, var(--wd-blue), var(--wd-cyan));
    color: #fff;
    border-color: transparent;
    box-shadow: 0 8px 20px rgba(0, 82, 217, 0.25);
}

.cycle-discount-pill {
    font-size: 0.72rem;
    padding: 2px 8px;
    border-radius: 999px;
    background: var(--wd-gold-light);
    color: var(--wd-gold-dark);
    font-weight: 800;
}

.pricing-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    margin-bottom: 48px;
}

.pricing-card {
    background: var(--bg-card-solid);
    border: 1.5px solid var(--border-color);
    border-radius: var(--radius-xl);
    padding: 32px 26px;
    box-shadow: var(--shadow-md);
    transition: var(--transition);
    display: flex;
    flex-direction: column;
    position: relative;
}

.pricing-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
    border-color: var(--wd-cyan);
}

.pricing-card.popular {
    border: 2px solid var(--wd-blue);
    box-shadow: 0 22px 48px -10px rgba(0, 82, 217, 0.18);
    background: linear-gradient(180deg, #FFFFFF 0%, #F8FBFF 100%);
}

.popular-tag {
    position: absolute;
    top: -14px;
    right: 22px;
    background: linear-gradient(135deg, var(--wd-gold) 0%, var(--wd-gold-dark) 100%);
    color: #fff;
    font-size: 0.78rem;
    font-weight: 800;
    padding: 5px 14px;
    border-radius: 999px;
    box-shadow: var(--shadow-gold);
}

.pricing-plan-name {
    font-size: 1.38rem;
    font-weight: 850;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 6px;
}

.pricing-traffic-highlight {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: var(--wd-blue-light);
    color: var(--wd-blue);
    font-weight: 800;
    font-size: 0.92rem;
    padding: 5px 12px;
    border-radius: 8px;
    margin-bottom: 18px;
    width: fit-content;
}

.pricing-price-box {
    margin-bottom: 18px;
    padding-bottom: 18px;
    border-bottom: 1px solid var(--border-color);
}

.currency {
    font-size: 1.3rem;
    font-weight: 800;
    color: var(--wd-blue);
    vertical-align: top;
}

.price-number {
    font-size: 2.75rem;
    font-weight: 900;
    color: var(--text-primary);
    letter-spacing: -0.03em;
    line-height: 1;
}

.price-period {
    font-size: 0.92rem;
    color: var(--text-muted);
    font-weight: 600;
}

/* 卡片内全周期价格小矩阵 */
.card-cycle-matrix {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 6px;
    margin-bottom: 18px;
    background: var(--bg-secondary);
    padding: 10px;
    border-radius: 12px;
    text-align: center;
}

.matrix-item {
    padding: 4px;
    border-radius: 8px;
}

.matrix-item .m-label {
    display: block;
    font-size: 0.72rem;
    color: var(--text-muted);
}

.matrix-item .m-val {
    font-size: 0.88rem;
    font-weight: 800;
    color: var(--text-primary);
}

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

.pricing-feature-item {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 0.92rem;
    color: var(--text-secondary);
    margin-bottom: 11px;
}

.feature-check {
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--status-good-bg);
    color: var(--status-good);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 0.75rem;
    font-weight: 900;
    flex-shrink: 0;
}

/* 官方原图 1:1 精确价格对照表 */
.pricing-table-container {
    background: var(--bg-card-solid);
    border: 1.5px solid var(--border-highlight);
    border-radius: var(--radius-xl);
    padding: 32px;
    box-shadow: var(--shadow-lg);
}

.pricing-table-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 12px;
    margin-bottom: 20px;
}

.pricing-custom-table {
    width: 100%;
    border-collapse: collapse;
    text-align: center;
    border: 1px solid #CBD5E1;
    border-radius: 12px;
    overflow: hidden;
}

.pricing-custom-table th {
    background: #F1F5F9;
    color: #1E293B;
    font-weight: 800;
    font-size: 1rem;
    padding: 16px 14px;
    border: 1px solid #CBD5E1;
}

.pricing-custom-table td {
    padding: 16px 14px;
    border: 1px solid #CBD5E1;
    font-size: 1rem;
    color: #1E293B;
    font-weight: 600;
}

.pricing-custom-table tbody tr:nth-child(odd) {
    background: #F8FAFC;
}

.pricing-custom-table tbody tr:nth-child(even) {
    background: #FFFFFF;
}

.pricing-custom-table tbody tr:hover {
    background: #EFF6FF;
}

/* ==========================================================================
   5. 知识库与教程板块 (12篇 SEO 梯子关键字长文)
   ========================================================================== */
.tutorials-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.tutorial-card {
    background: var(--bg-card-solid);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 26px;
    box-shadow: var(--shadow-md);
    transition: var(--transition);
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.tutorial-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
    border-color: var(--wd-blue);
}

.tutorial-meta {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 14px;
    font-size: 0.8rem;
}

.tutorial-tag {
    background: var(--wd-blue-light);
    color: var(--wd-blue);
    font-weight: 700;
    padding: 4px 11px;
    border-radius: 999px;
}

.tutorial-read-time {
    color: var(--text-muted);
}

.tutorial-title {
    font-size: 1.14rem;
    font-weight: 800;
    color: var(--text-primary);
    margin-bottom: 12px;
    line-height: 1.45;
}

.tutorial-card:hover .tutorial-title {
    color: var(--wd-blue);
}

.tutorial-excerpt {
    font-size: 0.91rem;
    color: var(--text-secondary);
    margin-bottom: 18px;
    flex: 1;
}

.tutorial-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-weight: 700;
    font-size: 0.9rem;
    color: var(--wd-blue);
}

.tutorial-link:hover {
    gap: 10px;
}

/* ==========================================================================
   6. 用户评价板块 (User Reviews)
   ========================================================================== */
.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.testimonial-card {
    background: var(--bg-card-solid);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 28px;
    box-shadow: var(--shadow-md);
    transition: var(--transition);
}

.testimonial-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
    border-color: var(--border-highlight);
}

.testimonial-user {
    display: flex;
    align-items: center;
    gap: 14px;
    margin-bottom: 14px;
}

.avatar-img {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--wd-blue), var(--wd-cyan));
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 800;
    font-size: 1.15rem;
}

.user-name {
    font-weight: 800;
    font-size: 1rem;
    color: var(--text-primary);
}

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

.star-rating {
    color: var(--wd-gold);
    font-size: 0.95rem;
    letter-spacing: 2px;
    margin-bottom: 10px;
}

.testimonial-quote {
    color: var(--text-secondary);
    font-size: 0.94rem;
    line-height: 1.7;
}

/* ==========================================================================
   7. 常见问题板块 (FAQ Accordion)
   ========================================================================== */
.faq-wrapper {
    max-width: 880px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.faq-item {
    background: var(--bg-card-solid);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.faq-item.active {
    border-color: var(--wd-blue);
    box-shadow: var(--shadow-md);
}

.faq-question {
    padding: 20px 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    cursor: pointer;
    font-weight: 800;
    font-size: 1.04rem;
    color: var(--text-primary);
    user-select: none;
}

.faq-question:hover {
    color: var(--wd-blue);
}

.faq-icon {
    color: var(--wd-blue);
    transition: transform 0.3s ease;
}

.faq-item.active .faq-icon {
    transform: rotate(180deg);
}

.faq-answer {
    display: none;
    padding: 0 24px 20px;
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.75;
    border-top: 1px dashed var(--border-color);
    padding-top: 14px;
}

.faq-item.active .faq-answer {
    display: block;
}

/* ==========================================================================
   页脚与 IndexNow 状态栏 (Footer & IndexNow Integration)
   ========================================================================== */
footer {
    background: #FFFFFF;
    border-top: 1px solid var(--border-color);
    padding: 68px 0 32px;
    margin-top: 40px;
    position: relative;
    z-index: 2;
}

.footer-top {
    display: grid;
    grid-template-columns: 1.4fr 1fr 1.2fr 1fr;
    gap: 36px;
    padding-bottom: 44px;
    border-bottom: 1px solid var(--border-color);
}

.footer-brand p {
    margin-top: 14px;
    color: var(--text-secondary);
    font-size: 0.92rem;
    line-height: 1.7;
}

.footer-column-title {
    font-size: 1rem;
    font-weight: 800;
    color: var(--text-primary);
    margin-bottom: 16px;
}

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

.footer-links a {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.footer-links a:hover {
    color: var(--wd-blue);
    padding-left: 4px;
}

.footer-bottom {
    padding-top: 26px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 16px;
    font-size: 0.88rem;
    color: var(--text-muted);
}

/* ==========================================================================
   知识库独立文章详情页样式 (Article Detail Pages)
   ========================================================================== */
.article-header {
    padding: 54px 0 36px;
    background: linear-gradient(180deg, rgba(239, 246, 255, 0.85) 0%, rgba(248, 250, 252, 0.4) 100%);
    border-bottom: 1px solid var(--border-color);
}

.article-breadcrumb {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 8px;
    font-size: 0.88rem;
    color: var(--text-muted);
    margin-bottom: 14px;
}

.article-meta-info {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
    margin-top: 16px;
    font-size: 0.88rem;
    color: var(--text-secondary);
}

.article-content-wrapper {
    display: grid;
    grid-template-columns: 1fr 330px;
    gap: 32px;
    padding: 44px 0 72px;
    align-items: start;
}

.article-body {
    background: #FFFFFF;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    padding: 42px;
    box-shadow: var(--shadow-md);
}

.article-body h2 {
    font-size: 1.5rem;
    font-weight: 850;
    color: var(--text-primary);
    margin: 34px 0 16px;
    padding-left: 14px;
    border-left: 4px solid var(--wd-blue);
}

.article-body h3 {
    font-size: 1.2rem;
    font-weight: 800;
    color: var(--text-primary);
    margin: 24px 0 12px;
}

.article-body p {
    color: var(--text-secondary);
    font-size: 1rem;
    line-height: 1.85;
    margin-bottom: 16px;
}

.article-body ul,
.article-body ol {
    padding-left: 22px;
    margin-bottom: 18px;
    color: var(--text-secondary);
    line-height: 1.85;
}

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

.article-body code {
    background: var(--bg-secondary);
    color: var(--wd-blue-dark);
    padding: 2px 7px;
    border-radius: 6px;
    font-size: 0.9em;
    font-family: Consolas, Monaco, monospace;
}

.article-alert {
    background: linear-gradient(90deg, #EFF6FF 0%, #F0F9FF 100%);
    border-left: 4px solid var(--wd-blue);
    padding: 18px 22px;
    border-radius: 12px;
    margin-bottom: 26px;
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.article-sidebar-box {
    background: #FFFFFF;
    border: 1px solid var(--border-highlight);
    border-radius: var(--radius-lg);
    padding: 26px;
    box-shadow: var(--shadow-md);
    position: sticky;
    top: 96px;
}

/* ==========================================================================
   响应式适配 (Responsive Media Queries)
   ========================================================================== */
@media (max-width: 1080px) {
    .hero-grid { grid-template-columns: 1fr; }
    .pricing-grid { grid-template-columns: repeat(2, 1fr); }
    .features-grid, .tutorials-grid, .testimonials-grid { grid-template-columns: repeat(2, 1fr); }
    .footer-top { grid-template-columns: repeat(2, 1fr); }
    .article-content-wrapper { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
    .mobile-toggle { display: inline-flex; align-items: center; justify-content: center; }
    .nav-links {
        display: none;
        position: absolute;
        top: 76px;
        left: 0;
        width: 100%;
        background: #FFFFFF;
        flex-direction: column;
        padding: 16px 24px;
        border-bottom: 1px solid var(--border-color);
        box-shadow: var(--shadow-md);
    }
    .nav-links.open { display: flex; }
    .hero-title { font-size: 2.2rem; }
    .hero-stats { grid-template-columns: repeat(2, 1fr); }
    .pricing-grid, .features-grid, .tutorials-grid, .testimonials-grid, .footer-top {
        grid-template-columns: 1fr;
    }
    .article-body { padding: 24px 20px; }
}