/* ========================================
   工厂全域获客实战营 - 未来科技感主题
   Futuristic Sci-Fi Design
   ======================================== */

/* ===== 设计变量 ===== */
:root {
    /* 深空背景 */
    --bg-deep: #030610;
    --bg-dark: #060b16;
    --bg-card: #0a1020;
    --bg-glass: rgba(10, 16, 32, 0.55);
    --bg-glass-hover: rgba(15, 23, 42, 0.7);

    /* 霓虹色系 */
    --neon-cyan: #00f0ff;
    --neon-blue: #0080ff;
    --neon-purple: #a855f7;
    --neon-pink: #ec4899;
    --neon-green: #00ff88;
    --neon-orange: #ff6b35;
    --neon-gold: #fbbf24;
    --neon-red: #ff3860;

    /* 渐变 */
    --grad-hero: linear-gradient(135deg, #030610 0%, #060b16 40%, #0a1020 100%);
    --grad-cyan-purple: linear-gradient(135deg, #00f0ff 0%, #a855f7 100%);
    --grad-orange-gold: linear-gradient(135deg, #ff6b35 0%, #fbbf24 100%);
    --grad-blue-cyan: linear-gradient(135deg, #0080ff 0%, #00f0ff 100%);
    --grad-purple-pink: linear-gradient(135deg, #a855f7 0%, #ec4899 100%);
    --grad-green-cyan: linear-gradient(135deg, #00ff88 0%, #00f0ff 100%);

    /* 文字 */
    --text-primary: #e2e8f0;
    --text-secondary: #8b9bb4;
    --text-muted: #5a6885;

    /* 边框 */
    --border-glass: rgba(0, 240, 255, 0.12);
    --border-glow: rgba(0, 240, 255, 0.3);
    --border-card: rgba(255, 255, 255, 0.06);

    /* 阴影/光效 */
    --glow-cyan: 0 0 30px rgba(0, 240, 255, 0.25);
    --glow-purple: 0 0 30px rgba(168, 85, 247, 0.25);
    --glow-orange: 0 0 30px rgba(255, 107, 53, 0.3);
    --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.4);
    --shadow-card-hover: 0 16px 48px rgba(0, 0, 0, 0.5);

    /* 圆角 */
    --radius-sm: 10px;
    --radius-md: 16px;
    --radius-lg: 24px;

    /* 容器 */
    --container: 1280px;
    --transition: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: 70px;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
    color: var(--text-primary);
    background: var(--bg-deep);
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

/* 全局背景 - 微妙的网格纹理 */
body::before {
    content: '';
    position: fixed;
    inset: 0;
    background-image:
        linear-gradient(rgba(0, 240, 255, 0.02) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0, 240, 255, 0.02) 1px, transparent 1px);
    background-size: 60px 60px;
    pointer-events: none;
    z-index: 0;
}

a { text-decoration: none; color: inherit; }
ul { list-style: none; }
img { max-width: 100%; display: block; }

.container {
    max-width: var(--container);
    margin: 0 auto;
    padding: 0 24px;
    position: relative;
    z-index: 1;
}

/* ===== 通用按钮 ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 28px;
    border-radius: var(--radius-sm);
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    border: none;
    white-space: nowrap;
    position: relative;
    overflow: hidden;
}

.btn-lg {
    padding: 16px 36px;
    font-size: 17px;
}

.btn-block { width: 100%; }

/* 主按钮 - 霓虹渐变 */
.btn-primary {
    background: var(--grad-orange-gold);
    color: #fff;
    box-shadow: 0 4px 20px rgba(255, 107, 53, 0.4), 0 0 0 1px rgba(255, 107, 53, 0.3);
}

.btn-primary::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, transparent 0%, rgba(255,255,255,0.2) 50%, transparent 100%);
    transform: translateX(-100%);
    transition: transform 0.5s;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 32px rgba(255, 107, 53, 0.5), 0 0 0 1px rgba(255, 107, 53, 0.5);
}

.btn-primary:hover::before {
    transform: translateX(100%);
}

/* 描边按钮 - 霓虹边框 */
.btn-outline {
    background: transparent;
    color: var(--neon-cyan);
    border: 2px solid var(--border-glow);
    box-shadow: inset 0 0 20px rgba(0, 240, 255, 0.05);
}

.btn-outline:hover {
    border-color: var(--neon-cyan);
    background: rgba(0, 240, 255, 0.08);
    color: var(--neon-cyan);
    box-shadow: 0 0 20px rgba(0, 240, 255, 0.2), inset 0 0 20px rgba(0, 240, 255, 0.08);
}

/* ===== 通用文本 ===== */
.text-accent {
    background: var(--grad-orange-gold);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.section {
    padding: 100px 0;
    position: relative;
    z-index: 1;
}

.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-tag {
    display: inline-block;
    padding: 6px 18px;
    background: rgba(0, 240, 255, 0.08);
    color: var(--neon-cyan);
    border: 1px solid rgba(0, 240, 255, 0.2);
    border-radius: 100px;
    font-size: 13px;
    font-weight: 600;
    margin-bottom: 16px;
    letter-spacing: 0.5px;
    text-transform: uppercase;
}

.section-tag-hot {
    background: rgba(255, 107, 53, 0.1);
    color: var(--neon-orange);
    border-color: rgba(255, 107, 53, 0.3);
}

.section-tag-light {
    background: rgba(255, 255, 255, 0.1);
    color: #fff;
    border-color: rgba(255, 255, 255, 0.2);
}

.section-title {
    font-size: 40px;
    font-weight: 800;
    color: #fff;
    line-height: 1.3;
    margin-bottom: 12px;
    letter-spacing: -0.5px;
}

.section-subtitle {
    font-size: 17px;
    color: var(--text-secondary);
    max-width: 640px;
    margin: 0 auto;
}

/* ===== 导航栏 ===== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 70px;
    background: rgba(3, 6, 16, 0.75);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-glass);
    z-index: 1000;
    transition: var(--transition);
}

.navbar.scrolled {
    background: rgba(3, 6, 16, 0.92);
    border-bottom-color: rgba(0, 240, 255, 0.2);
    box-shadow: 0 4px 30px rgba(0, 240, 255, 0.08);
}

.nav-container {
    max-width: var(--container);
    height: 100%;
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-shrink: 0;
    min-width: 0;
}

.nav-logo-icon {
    width: 32px;
    height: 32px;
    flex-shrink: 0;
    border-radius: 7px;
}

.nav-logo-text {
    display: flex;
    flex-direction: column;
    gap: 2px;
    min-width: 0;
    white-space: nowrap;
}

.nav-logo-title {
    font-size: 16px;
    font-weight: 800;
    color: #fff;
    line-height: 1.2;
    letter-spacing: 0.5px;
    white-space: nowrap;
}

.nav-logo-sub {
    font-size: 11px;
    color: var(--neon-cyan);
    letter-spacing: 1.2px;
    opacity: 0.85;
    white-space: nowrap;
}

.nav-menu {
    display: flex;
    gap: 2px;
    margin-left: auto;
}

.nav-link {
    padding: 8px 10px;
    font-size: 14px;
    font-weight: 500;
    color: var(--text-secondary);
    border-radius: var(--radius-sm);
    transition: var(--transition);
    white-space: nowrap;
    letter-spacing: 0.5px;
}

.nav-link:hover {
    color: var(--neon-cyan);
    background: rgba(0, 240, 255, 0.08);
    text-shadow: 0 0 12px rgba(0, 240, 255, 0.4);
}

.nav-cta {
    padding: 10px 18px;
    background: var(--grad-orange-gold);
    color: #fff !important;
    border-radius: var(--radius-sm);
    font-size: 14px;
    font-weight: 600;
    letter-spacing: 1px;
    white-space: nowrap;
    font-weight: 600;
    transition: var(--transition);
    box-shadow: 0 2px 16px rgba(255, 107, 53, 0.35);
}

.nav-cta:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 24px rgba(255, 107, 53, 0.5);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
}

.nav-toggle span {
    width: 24px;
    height: 2px;
    background: var(--neon-cyan);
    border-radius: 2px;
    transition: var(--transition);
    box-shadow: 0 0 8px rgba(0, 240, 255, 0.4);
}

/* ===== Hero ===== */
.hero {
    position: relative;
    padding: 120px 0 80px;
    background: var(--grad-hero);
    overflow: hidden;
}

/* 粒子画布 */
#particleCanvas {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 0;
}

.hero-bg {
    position: absolute;
    inset: 0;
    background-image:
        radial-gradient(circle at 15% 25%, rgba(0, 240, 255, 0.12) 0%, transparent 45%),
        radial-gradient(circle at 85% 75%, rgba(168, 85, 247, 0.1) 0%, transparent 45%),
        radial-gradient(circle at 50% 100%, rgba(255, 107, 53, 0.08) 0%, transparent 50%);
}

/* 网格地面透视效果 */
.hero-bg::before {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 50%;
    background-image:
        linear-gradient(rgba(0, 240, 255, 0.06) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0, 240, 255, 0.06) 1px, transparent 1px);
    background-size: 40px 40px;
    transform: perspective(400px) rotateX(60deg);
    transform-origin: bottom;
    mask-image: linear-gradient(transparent 0%, rgba(0,0,0,0.8) 50%, transparent 100%);
    -webkit-mask-image: linear-gradient(transparent 0%, rgba(0,0,0,0.8) 50%, transparent 100%);
}

.hero-container {
    position: relative;
    max-width: var(--container);
    margin: 0 auto;
    padding: 0 24px;
    display: grid;
    grid-template-columns: 1.1fr 0.9fr;
    gap: 60px;
    align-items: center;
    z-index: 1;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 18px;
    background: rgba(255, 107, 53, 0.1);
    border: 1px solid rgba(255, 107, 53, 0.3);
    border-radius: 100px;
    color: var(--neon-orange);
    font-size: 13px;
    font-weight: 600;
    margin-bottom: 24px;
    backdrop-filter: blur(10px);
}

.pulse-dot {
    width: 8px;
    height: 8px;
    background: var(--neon-orange);
    border-radius: 50%;
    box-shadow: 0 0 12px var(--neon-orange);
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; transform: scale(1); box-shadow: 0 0 12px var(--neon-orange); }
    50% { opacity: 0.6; transform: scale(1.4); box-shadow: 0 0 20px var(--neon-orange); }
}

.hero-title {
    font-size: 54px;
    font-weight: 900;
    color: #fff;
    line-height: 1.15;
    margin-bottom: 20px;
    letter-spacing: -1px;
}

.hero-title-accent {
    background: var(--grad-orange-gold);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    filter: drop-shadow(0 0 20px rgba(255, 107, 53, 0.3));
}

.hero-desc {
    font-size: 18px;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 32px;
    max-width: 560px;
}

.hero-desc strong {
    color: var(--neon-cyan);
    text-shadow: 0 0 12px rgba(0, 240, 255, 0.3);
}

.hero-cta-group {
    display: flex;
    gap: 16px;
    margin-bottom: 48px;
    flex-wrap: wrap;
}

.hero .btn-outline {
    color: var(--neon-cyan);
    border-color: rgba(0, 240, 255, 0.3);
}

.hero .btn-outline:hover {
    background: rgba(0, 240, 255, 0.08);
    border-color: var(--neon-cyan);
    box-shadow: 0 0 24px rgba(0, 240, 255, 0.2);
}

.hero-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    padding-top: 32px;
    border-top: 1px solid rgba(0, 240, 255, 0.1);
}

.hero-stat-num {
    font-size: 36px;
    font-weight: 800;
    color: #fff;
    line-height: 1;
    text-shadow: 0 0 20px rgba(0, 240, 255, 0.3);
}

.hero-stat-num::after {
    content: '+';
    background: var(--grad-cyan-purple);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-stat-label {
    font-size: 13px;
    color: var(--text-muted);
    margin-top: 6px;
}

/* Hero Visual - 玻璃态卡片 */
.hero-visual {
    position: relative;
    height: 420px;
}

.hero-card-stack {
    position: relative;
    height: 100%;
}

.hero-card {
    position: absolute;
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 18px 22px;
    background: var(--bg-glass);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-md);
    transition: var(--transition);
    box-shadow: var(--shadow-card);
}

.hero-card::before {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: var(--radius-md);
    padding: 1px;
    background: linear-gradient(135deg, rgba(0, 240, 255, 0.3), transparent 50%, rgba(168, 85, 247, 0.2));
    -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    -webkit-mask-composite: xor;
    mask-composite: exclude;
    pointer-events: none;
    opacity: 0.5;
    transition: opacity 0.3s;
}

.hero-card:hover {
    background: var(--bg-glass-hover);
    transform: translateY(-6px);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.5), 0 0 30px rgba(0, 240, 255, 0.1);
}

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

.hero-card-1 {
    top: 20px;
    right: 0;
    width: 320px;
    animation: floatCard 4s ease-in-out infinite;
}

.hero-card-2 {
    top: 150px;
    left: 0;
    width: 280px;
    animation: floatCard 4s ease-in-out infinite 1s;
}

.hero-card-3 {
    bottom: 20px;
    right: 20px;
    width: 300px;
    animation: floatCard 4s ease-in-out infinite 2s;
}

@keyframes floatCard {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-12px); }
}

.hero-card-icon {
    font-size: 32px;
    flex-shrink: 0;
    filter: drop-shadow(0 0 8px rgba(0, 240, 255, 0.3));
}

.hero-card-title {
    font-size: 16px;
    font-weight: 700;
    color: #fff;
}

.hero-card-desc {
    font-size: 13px;
    color: var(--text-muted);
}

.hero-card-tag {
    padding: 3px 10px;
    background: var(--grad-orange-gold);
    color: #fff;
    border-radius: 100px;
    font-size: 11px;
    font-weight: 700;
    white-space: nowrap;
    box-shadow: 0 2px 8px rgba(255, 107, 53, 0.4);
}

.hero-glow {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 350px;
    height: 350px;
    background: radial-gradient(circle, rgba(0, 240, 255, 0.15) 0%, rgba(168, 85, 247, 0.08) 40%, transparent 70%);
    border-radius: 50%;
    z-index: -1;
    animation: glowPulse 6s ease-in-out infinite;
}

@keyframes glowPulse {
    0%, 100% { opacity: 0.6; transform: translate(-50%, -50%) scale(1); }
    50% { opacity: 1; transform: translate(-50%, -50%) scale(1.15); }
}

.hero-wave {
    position: absolute;
    bottom: -1px;
    left: 0;
    width: 100%;
    line-height: 0;
    z-index: 1;
}

.hero-wave svg {
    width: 100%;
    height: 80px;
}

.hero-wave svg path {
    fill: var(--bg-dark);
}

/* ===== 痛点 ===== */
.pain-points {
    background: var(--bg-dark);
}

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

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

.pain-card::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 3px;
    height: 100%;
    background: var(--grad-orange-gold);
    opacity: 0;
    transition: opacity 0.3s;
}

.pain-card:hover {
    border-color: rgba(255, 107, 53, 0.25);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4), 0 0 20px rgba(255, 107, 53, 0.1);
    transform: translateY(-4px);
}

.pain-card:hover::after {
    opacity: 1;
}

.pain-icon {
    font-size: 36px;
    margin-bottom: 16px;
    filter: drop-shadow(0 0 8px rgba(255, 107, 53, 0.2));
}

.pain-card h3 {
    font-size: 18px;
    font-weight: 700;
    color: #fff;
    margin-bottom: 10px;
}

.pain-card p {
    font-size: 15px;
    color: var(--text-secondary);
    line-height: 1.6;
}

.pain-summary {
    text-align: center;
    margin-top: 40px;
    padding: 28px;
    background: linear-gradient(135deg, rgba(255, 107, 53, 0.08) 0%, rgba(251, 191, 36, 0.08) 100%);
    border: 1px solid rgba(255, 107, 53, 0.15);
    border-radius: var(--radius-md);
}

.pain-summary p {
    font-size: 18px;
    color: #fff;
    font-weight: 600;
}

.pain-summary strong {
    background: var(--grad-orange-gold);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-size: 24px;
}

/* ===== 解决方案 ===== */
.solution {
    background: var(--bg-deep);
    position: relative;
}

.solution::before {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(0, 240, 255, 0.06) 0%, transparent 70%);
    pointer-events: none;
}

.solution-grid {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: 24px;
    position: relative;
}

.solution-card {
    padding: 32px 28px;
    background: var(--bg-glass);
    backdrop-filter: blur(12px);
    border-radius: var(--radius-md);
    border: 1px solid var(--border-card);
    transition: var(--transition);
}

.solution-card:hover {
    background: var(--bg-glass-hover);
    border-color: rgba(0, 240, 255, 0.2);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4), 0 0 24px rgba(0, 240, 255, 0.08);
    transform: translateY(-6px);
}

.solution-card-main {
    grid-column: span 3;
    background: linear-gradient(135deg, rgba(0, 128, 255, 0.08) 0%, rgba(168, 85, 247, 0.08) 100%);
    border: 1px solid rgba(0, 240, 255, 0.15);
    color: #fff;
    padding: 40px;
    backdrop-filter: blur(16px);
}

.solution-card-main:hover {
    border-color: rgba(0, 240, 255, 0.3);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.4), 0 0 40px rgba(0, 240, 255, 0.1);
}

.solution-card-main h3 { color: #fff; }
.solution-card-main p { color: var(--text-secondary); }

.solution-icon {
    font-size: 36px;
    margin-bottom: 16px;
    filter: drop-shadow(0 0 12px rgba(0, 240, 255, 0.3));
}

.solution-card h3 {
    font-size: 20px;
    font-weight: 700;
    color: #fff;
    margin-bottom: 10px;
}

.solution-card p {
    font-size: 15px;
    color: var(--text-secondary);
    line-height: 1.7;
}

.solution-card p strong {
    background: var(--grad-cyan-purple);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.solution-card-main strong {
    background: var(--grad-orange-gold);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.solution-list {
    margin-top: 16px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
}

.solution-list li {
    padding: 10px 16px;
    background: rgba(0, 240, 255, 0.05);
    border: 1px solid rgba(0, 240, 255, 0.1);
    border-radius: var(--radius-sm);
    font-size: 14px;
    color: var(--text-primary);
    position: relative;
    padding-left: 36px;
}

.solution-list li::before {
    content: '✓';
    position: absolute;
    left: 14px;
    color: var(--neon-cyan);
    font-weight: 700;
    text-shadow: 0 0 8px rgba(0, 240, 255, 0.4);
}

/* ===== U盘工具箱 ===== */
.toolkit {
    background: var(--bg-dark);
    position: relative;
}

.toolkit::before {
    content: '';
    position: absolute;
    top: 20%;
    right: 10%;
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(168, 85, 247, 0.06) 0%, transparent 70%);
    pointer-events: none;
}

.toolkit-showcase {
    display: grid;
    grid-template-columns: 320px 1fr;
    gap: 48px;
    align-items: start;
    margin-bottom: 48px;
}

.toolkit-usb {
    position: sticky;
    top: 90px;
}

.usb-visual {
    position: relative;
    margin-bottom: 32px;
}

.usb-body {
    width: 200px;
    height: 80px;
    margin: 0 auto;
    background: linear-gradient(135deg, #1a1f2e 0%, #0d1117 100%);
    border: 1px solid rgba(0, 240, 255, 0.2);
    border-radius: 12px;
    position: relative;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.5), 0 0 20px rgba(0, 240, 255, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
}

.usb-body::before {
    content: '';
    position: absolute;
    right: -30px;
    top: 15px;
    width: 30px;
    height: 50px;
    background: linear-gradient(135deg, #374151 0%, #1f2937 100%);
    border-radius: 0 4px 4px 0;
    border: 1px solid rgba(0, 240, 255, 0.1);
}

.usb-body::after {
    content: '';
    position: absolute;
    right: -26px;
    top: 22px;
    width: 14px;
    height: 5px;
    background: #4b5563;
    box-shadow: 0 10px 0 #4b5563, 0 20px 0 #4b5563;
}

.usb-label {
    color: var(--neon-cyan);
    font-size: 13px;
    font-weight: 700;
    text-align: center;
    line-height: 1.4;
    z-index: 1;
    text-shadow: 0 0 8px rgba(0, 240, 255, 0.4);
}

.usb-led {
    position: absolute;
    top: 12px;
    left: 16px;
    width: 6px;
    height: 6px;
    background: var(--neon-green);
    border-radius: 50%;
    box-shadow: 0 0 12px var(--neon-green);
    animation: ledBlink 2s ease-in-out infinite;
}

@keyframes ledBlink {
    0%, 100% { opacity: 1; box-shadow: 0 0 12px var(--neon-green); }
    50% { opacity: 0.3; box-shadow: 0 0 4px var(--neon-green); }
}

.usb-shadow {
    width: 160px;
    height: 16px;
    margin: 16px auto 0;
    background: radial-gradient(ellipse, rgba(0, 240, 255, 0.1) 0%, transparent 70%);
    border-radius: 50%;
}

.toolkit-specs {
    padding: 24px;
    background: var(--bg-glass);
    backdrop-filter: blur(12px);
    border-radius: var(--radius-md);
    border: 1px solid var(--border-card);
}

.spec-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.04);
}

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

.spec-label {
    font-size: 13px;
    color: var(--text-muted);
    font-weight: 500;
}

.spec-value {
    font-size: 13px;
    color: var(--neon-cyan);
    font-weight: 600;
}

.toolkit-features {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
}

.toolkit-feature {
    display: flex;
    gap: 14px;
    padding: 20px;
    background: var(--bg-glass);
    backdrop-filter: blur(12px);
    border-radius: var(--radius-md);
    border: 1px solid var(--border-card);
    transition: var(--transition);
}

.toolkit-feature:hover {
    border-color: rgba(0, 240, 255, 0.2);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.3), 0 0 16px rgba(0, 240, 255, 0.08);
    transform: translateY(-3px);
}

.tf-icon {
    font-size: 28px;
    flex-shrink: 0;
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0, 240, 255, 0.06);
    border: 1px solid rgba(0, 240, 255, 0.1);
    border-radius: var(--radius-sm);
    filter: drop-shadow(0 0 6px rgba(0, 240, 255, 0.15));
}

.tf-body h4 {
    font-size: 15px;
    font-weight: 700;
    color: #fff;
    margin-bottom: 4px;
}

.tf-body p {
    font-size: 13px;
    color: var(--text-secondary);
    line-height: 1.5;
}

.toolkit-banner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 32px 40px;
    background: linear-gradient(135deg, rgba(255, 107, 53, 0.15) 0%, rgba(168, 85, 247, 0.15) 100%);
    border: 1px solid rgba(255, 107, 53, 0.2);
    border-radius: var(--radius-lg);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3), 0 0 40px rgba(255, 107, 53, 0.08);
    backdrop-filter: blur(16px);
}

.toolkit-banner-content {
    display: flex;
    align-items: center;
    gap: 20px;
}

.toolkit-banner-icon { font-size: 40px; }

.toolkit-banner h3 {
    font-size: 22px;
    font-weight: 800;
    color: #fff;
    margin-bottom: 4px;
}

.toolkit-banner p {
    font-size: 15px;
    color: var(--text-secondary);
}

.toolkit-banner .btn-primary {
    background: var(--grad-orange-gold);
    color: #fff;
}

/* ===== 课程大纲 ===== */
.curriculum {
    background: var(--bg-deep);
    position: relative;
}

.curriculum-tabs {
    display: flex;
    justify-content: center;
    gap: 8px;
    margin-bottom: 40px;
    flex-wrap: wrap;
}

.cur-tab {
    padding: 12px 24px;
    background: var(--bg-glass);
    border: 1px solid var(--border-card);
    border-radius: 100px;
    font-size: 14px;
    font-weight: 600;
    color: var(--text-secondary);
    cursor: pointer;
    transition: var(--transition);
    backdrop-filter: blur(10px);
}

.cur-tab:hover {
    color: var(--neon-cyan);
    border-color: rgba(0, 240, 255, 0.3);
    background: rgba(0, 240, 255, 0.06);
}

.cur-tab.active {
    background: var(--grad-blue-cyan);
    color: #fff;
    border-color: transparent;
    box-shadow: 0 4px 20px rgba(0, 128, 255, 0.3);
}

.cur-panel { display: none; }
.cur-panel.active { display: block; }

.cur-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

.cur-module {
    display: flex;
    gap: 24px;
    padding: 28px;
    background: var(--bg-glass);
    backdrop-filter: blur(12px);
    border-radius: var(--radius-md);
    transition: var(--transition);
    border-left: 3px solid var(--neon-cyan);
    border-top: 1px solid var(--border-card);
    border-right: 1px solid var(--border-card);
    border-bottom: 1px solid var(--border-card);
}

.cur-module:hover {
    background: var(--bg-glass-hover);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.3), 0 0 16px rgba(0, 240, 255, 0.08);
    transform: translateX(6px);
}

.cur-module-num {
    font-size: 36px;
    font-weight: 900;
    background: var(--grad-cyan-purple);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1;
    flex-shrink: 0;
    min-width: 48px;
    opacity: 0.6;
}

.cur-module-body h3 {
    font-size: 18px;
    font-weight: 700;
    color: #fff;
    margin-bottom: 8px;
}

.cur-module-body p {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 12px;
}

.cur-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}

.cur-tag {
    padding: 4px 12px;
    background: rgba(0, 240, 255, 0.06);
    color: var(--neon-cyan);
    border: 1px solid rgba(0, 240, 255, 0.12);
    border-radius: 100px;
    font-size: 12px;
    font-weight: 500;
}

/* ===== 适合人群 ===== */
.audience {
    background: var(--bg-dark);
}

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

.audience-card {
    padding: 36px 24px;
    background: var(--bg-glass);
    backdrop-filter: blur(12px);
    border-radius: var(--radius-md);
    text-align: center;
    border: 1px solid var(--border-card);
    transition: var(--transition);
}

.audience-card:hover {
    border-color: rgba(0, 255, 136, 0.25);
    box-shadow: 0 12px 36px rgba(0, 0, 0, 0.4), 0 0 24px rgba(0, 255, 136, 0.08);
    transform: translateY(-8px);
}

.audience-icon {
    font-size: 48px;
    margin-bottom: 16px;
    filter: drop-shadow(0 0 12px rgba(0, 255, 136, 0.2));
}

.audience-card h3 {
    font-size: 17px;
    font-weight: 700;
    color: #fff;
    margin-bottom: 10px;
}

.audience-card p {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* ===== 收费标准 ===== */
.pricing {
    background: var(--bg-deep);
}

.pricing-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
    max-width: 1000px;
    margin: 0 auto;
}

.pricing-card {
    position: relative;
    padding: 36px 32px;
    background: var(--bg-glass);
    backdrop-filter: blur(12px);
    border: 2px solid var(--border-card);
    border-radius: var(--radius-lg);
    transition: var(--transition);
}

.pricing-card:hover {
    border-color: rgba(0, 240, 255, 0.2);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.4);
}

.pricing-card-featured {
    border-color: rgba(255, 107, 53, 0.3);
    box-shadow: 0 0 40px rgba(255, 107, 53, 0.1), 0 12px 40px rgba(0, 0, 0, 0.4);
    transform: scale(1.05);
}

.pricing-card-featured:hover {
    transform: scale(1.05) translateY(-6px);
    box-shadow: 0 0 60px rgba(255, 107, 53, 0.15), 0 16px 48px rgba(0, 0, 0, 0.4);
}

.pricing-badge {
    position: absolute;
    top: -14px;
    left: 50%;
    transform: translateX(-50%);
    padding: 6px 20px;
    background: var(--grad-orange-gold);
    color: #fff;
    border-radius: 100px;
    font-size: 13px;
    font-weight: 700;
    white-space: nowrap;
    box-shadow: 0 4px 16px rgba(255, 107, 53, 0.4);
}

.pricing-name {
    font-size: 22px;
    font-weight: 800;
    color: #fff;
}

.pricing-desc {
    font-size: 14px;
    color: var(--text-muted);
    margin-bottom: 24px;
}

.pricing-price {
    display: flex;
    align-items: baseline;
    gap: 4px;
    margin-bottom: 28px;
    padding-bottom: 24px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.price-currency {
    font-size: 20px;
    font-weight: 700;
    color: var(--neon-cyan);
}

.price-amount {
    font-size: 42px;
    font-weight: 900;
    color: #fff;
    line-height: 1;
}

.price-original {
    font-size: 16px;
    color: var(--text-muted);
    text-decoration: line-through;
    margin-left: 8px;
}

.pricing-features { margin-bottom: 28px; }

.pf-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 8px 0;
    font-size: 14px;
    color: var(--text-primary);
}

.pf-check {
    color: var(--neon-green);
    font-weight: 700;
    flex-shrink: 0;
    text-shadow: 0 0 8px rgba(0, 255, 136, 0.4);
}

.pf-disabled {
    color: var(--text-muted);
    opacity: 0.4;
}

.pf-x {
    color: var(--text-muted);
    flex-shrink: 0;
}

.pricing-note {
    text-align: center;
    margin-top: 32px;
    font-size: 14px;
    color: var(--neon-gold);
}

/* ===== 学员反馈 ===== */
.testimonials {
    background: var(--bg-dark);
}

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

.testimonial-card {
    padding: 32px 28px;
    background: var(--bg-glass);
    backdrop-filter: blur(12px);
    border-radius: var(--radius-md);
    border: 1px solid var(--border-card);
    transition: var(--transition);
}

.testimonial-card:hover {
    border-color: rgba(236, 72, 153, 0.2);
    box-shadow: 0 12px 36px rgba(0, 0, 0, 0.4), 0 0 24px rgba(236, 72, 153, 0.08);
    transform: translateY(-4px);
}

.testimonial-stars {
    font-size: 18px;
    color: var(--neon-gold);
    letter-spacing: 2px;
    margin-bottom: 16px;
    text-shadow: 0 0 12px rgba(251, 191, 36, 0.3);
}

.testimonial-text {
    font-size: 15px;
    color: var(--text-primary);
    line-height: 1.7;
    margin-bottom: 20px;
}

.testimonial-author {
    display: flex;
    align-items: center;
    gap: 12px;
}

.testimonial-avatar {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: var(--grad-purple-pink);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    font-weight: 700;
    flex-shrink: 0;
    box-shadow: 0 0 16px rgba(168, 85, 247, 0.3);
}

.testimonial-name {
    font-size: 15px;
    font-weight: 700;
    color: #fff;
}

.testimonial-role {
    font-size: 13px;
    color: var(--text-muted);
}

/* ===== 报名表单 ===== */
.signup {
    background: linear-gradient(135deg, var(--bg-deep) 0%, #060b16 50%, #0a1020 100%);
    color: #fff;
    position: relative;
    overflow: hidden;
}

.signup::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--neon-cyan), var(--neon-purple), transparent);
    opacity: 0.5;
}

.signup-wrapper {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: start;
}

.signup-title {
    font-size: 40px;
    font-weight: 800;
    color: #fff;
    line-height: 1.3;
    margin-bottom: 16px;
}

.signup-desc {
    font-size: 16px;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 32px;
}

.signup-benefits {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 14px;
    margin-bottom: 32px;
}

.signup-benefit {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 14px 18px;
    background: rgba(0, 240, 255, 0.04);
    border-radius: var(--radius-sm);
    border: 1px solid rgba(0, 240, 255, 0.1);
    font-size: 14px;
    color: var(--text-primary);
}

.sb-icon { font-size: 20px; }

.signup-contact {
    display: flex;
    flex-direction: column;
    gap: 12px;
    padding-top: 24px;
    border-top: 1px solid rgba(0, 240, 255, 0.08);
}

.signup-contact-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 14px;
}

.sc-label { color: var(--text-muted); }
.sc-value { color: var(--neon-cyan); font-weight: 600; }

.signup-form-wrapper {
    background: var(--bg-glass);
    backdrop-filter: blur(20px);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-lg);
    padding: 40px;
    box-shadow: 0 24px 60px rgba(0, 0, 0, 0.4), 0 0 40px rgba(0, 240, 255, 0.05);
}

.form-title {
    font-size: 24px;
    font-weight: 800;
    color: #fff;
    margin-bottom: 24px;
    text-align: center;
}

.form-group { margin-bottom: 18px; }

.form-label {
    display: block;
    font-size: 14px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 6px;
}

.required { color: var(--neon-orange); }

.form-input,
.form-select,
.form-textarea {
    width: 100%;
    padding: 12px 16px;
    border: 2px solid var(--border-card);
    border-radius: var(--radius-sm);
    font-size: 15px;
    color: var(--text-primary);
    background: rgba(3, 6, 16, 0.5);
    transition: var(--transition);
    font-family: inherit;
}

.form-input::placeholder,
.form-textarea::placeholder {
    color: var(--text-muted);
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
    outline: none;
    border-color: var(--neon-cyan);
    background: rgba(0, 240, 255, 0.04);
    box-shadow: 0 0 0 4px rgba(0, 240, 255, 0.08);
}

.form-textarea { resize: vertical; }

.form-radios {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.form-radio {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 16px;
    border: 2px solid var(--border-card);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: var(--transition);
    font-size: 15px;
    color: var(--text-primary);
}

.form-radio:hover {
    border-color: rgba(0, 240, 255, 0.3);
}

.form-radio input:checked + span {
    color: var(--neon-cyan);
    font-weight: 700;
}

.form-radio:has(input:checked) {
    border-color: var(--neon-cyan);
    background: rgba(0, 240, 255, 0.06);
    box-shadow: 0 0 16px rgba(0, 240, 255, 0.1);
}

.form-radio input {
    accent-color: var(--neon-cyan);
}

.form-note {
    text-align: center;
    margin-top: 14px;
    font-size: 13px;
    color: var(--text-muted);
}

.form-success {
    text-align: center;
    padding: 20px 0;
}

.form-success-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto 16px;
    background: var(--grad-green-cyan);
    color: #fff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 32px;
    font-weight: 700;
    box-shadow: 0 0 32px rgba(0, 255, 136, 0.3);
}

.form-success h3 {
    font-size: 22px;
    font-weight: 800;
    color: #fff;
    margin-bottom: 8px;
}

.form-success p {
    font-size: 15px;
    color: var(--text-secondary);
}

.form-success-gift {
    margin-top: 16px;
    padding: 12px 20px;
    background: rgba(255, 107, 53, 0.08);
    border: 1px solid rgba(255, 107, 53, 0.15);
    border-radius: var(--radius-sm);
    color: var(--neon-orange);
    font-weight: 600;
}

/* ===== FAQ ===== */
.faq {
    background: var(--bg-deep);
}

.faq-list {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    border-bottom: 1px solid rgba(255, 255, 255, 0.04);
    overflow: hidden;
}

.faq-question {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 0;
    cursor: pointer;
    font-size: 17px;
    font-weight: 600;
    color: #fff;
    transition: var(--transition);
}

.faq-question:hover {
    color: var(--neon-cyan);
    text-shadow: 0 0 12px rgba(0, 240, 255, 0.2);
}

.faq-toggle {
    font-size: 24px;
    color: var(--neon-cyan);
    transition: var(--transition);
    flex-shrink: 0;
    text-shadow: 0 0 8px rgba(0, 240, 255, 0.3);
}

.faq-item.active .faq-toggle {
    transform: rotate(45deg);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease, padding 0.3s ease;
}

.faq-item.active .faq-answer {
    max-height: 400px;
    padding-bottom: 20px;
}

.faq-answer p {
    font-size: 15px;
    color: var(--text-secondary);
    line-height: 1.7;
}

/* ===== 最终CTA ===== */
.final-cta {
    background: linear-gradient(135deg, var(--bg-deep) 0%, #060b16 50%, #0a1020 100%);
    padding: 80px 0;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.final-cta::before {
    content: '';
    position: absolute;
    inset: 0;
    background-image:
        radial-gradient(circle at 30% 50%, rgba(255, 107, 53, 0.12) 0%, transparent 50%),
        radial-gradient(circle at 70% 50%, rgba(0, 240, 255, 0.1) 0%, transparent 50%);
}

.final-cta::after {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 80%;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--neon-cyan), transparent);
    opacity: 0.5;
}

.final-cta-content {
    position: relative;
}

.final-cta h2 {
    font-size: 38px;
    font-weight: 800;
    color: #fff;
    line-height: 1.4;
    margin-bottom: 16px;
}

.final-cta p {
    font-size: 17px;
    color: var(--text-secondary);
    margin-bottom: 32px;
    line-height: 1.7;
}

/* ===== 页脚 ===== */
.footer {
    background: var(--bg-deep);
    color: var(--text-muted);
    padding: 60px 0 24px;
    border-top: 1px solid rgba(0, 240, 255, 0.06);
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 40px;
    margin-bottom: 40px;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 16px;
}

.footer-logo-icon {
    width: 32px;
    height: 32px;
    border-radius: 7px;
}

.footer-logo span:last-child {
    font-size: 18px;
    font-weight: 800;
    color: #fff;
}

.footer-desc {
    font-size: 14px;
    line-height: 1.7;
    margin-bottom: 20px;
    max-width: 320px;
}

.footer-domain {
    display: inline-flex;
    flex-direction: column;
    gap: 4px;
    padding: 12px 20px;
    background: rgba(0, 240, 255, 0.04);
    border-radius: var(--radius-sm);
    border: 1px solid rgba(0, 240, 255, 0.1);
}

.footer-domain-label {
    font-size: 12px;
    color: var(--text-muted);
}

.footer-domain-value {
    font-size: 16px;
    font-weight: 700;
    color: var(--neon-cyan);
}

.footer-title {
    font-size: 15px;
    font-weight: 700;
    color: #fff;
    margin-bottom: 16px;
}

.footer-links li { margin-bottom: 10px; }

.footer-links a {
    font-size: 14px;
    color: var(--text-muted);
    transition: var(--transition);
}

.footer-links a:hover {
    color: var(--neon-cyan);
    text-shadow: 0 0 8px rgba(0, 240, 255, 0.3);
}

.footer-bottom {
    padding-top: 24px;
    border-top: 1px solid rgba(255, 255, 255, 0.04);
    text-align: center;
    font-size: 13px;
    color: var(--text-muted);
}

/* ===== 浮动按钮 ===== */
.float-cta {
    position: fixed;
    bottom: 24px;
    right: 24px;
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 14px 24px;
    background: var(--grad-orange-gold);
    color: #fff;
    border-radius: 100px;
    font-size: 15px;
    font-weight: 600;
    box-shadow: 0 8px 32px rgba(255, 107, 53, 0.4);
    z-index: 900;
    transition: var(--transition);
    opacity: 0;
    transform: translateY(20px);
    pointer-events: none;
}

.float-cta.visible {
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
}

.float-cta:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 40px rgba(255, 107, 53, 0.5);
}

.float-cta-icon { font-size: 20px; }

/* ===== 滚动动画 ===== */
[data-reveal] {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

[data-reveal].revealed {
    opacity: 1;
    transform: translateY(0);
}

/* ===== 导航栏用户状态 ===== */
#nav-user {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-left: auto;
    margin-right: 12px;
}

#nav-user .nav-login-btn {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 13px;
    padding: 6px 10px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-card);
    transition: var(--transition);
    white-space: nowrap;
    background: transparent;
}

#nav-user .nav-login-btn:hover {
    background: rgba(0, 240, 255, 0.06);
    color: var(--neon-cyan);
    border-color: rgba(0, 240, 255, 0.3);
}

#nav-user .nav-register-btn {
    background: var(--grad-orange-gold);
    color: #fff !important;
    text-decoration: none;
    font-size: 13px;
    padding: 6px 10px;
    border-radius: var(--radius-sm);
    font-weight: 600;
    transition: var(--transition);
    white-space: nowrap;
    box-shadow: 0 2px 12px rgba(255, 107, 53, 0.3);
}

#nav-user .nav-register-btn:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 20px rgba(255, 107, 53, 0.4);
}

.nav-user-dropdown { position: relative; }

.nav-user-btn {
    background: rgba(0, 240, 255, 0.08);
    color: var(--neon-cyan) !important;
    border: 1px solid rgba(0, 240, 255, 0.2);
    padding: 6px 14px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-size: 14px;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 6px;
    transition: var(--transition);
}

.nav-user-btn:hover {
    background: rgba(0, 240, 255, 0.12);
    border-color: rgba(0, 240, 255, 0.4);
}

.nav-user-btn::after {
    content: '▾';
    font-size: 10px;
    margin-left: 2px;
}

.nav-user-menu {
    position: absolute;
    right: 0;
    top: 100%;
    margin-top: 0;
    background: rgba(10, 16, 32, 0.95);
    backdrop-filter: blur(20px);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-sm);
    box-shadow: 0 16px 48px rgba(0, 0, 0, 0.5);
    min-width: 160px;
    padding: 8px 0;
    display: none;
    z-index: 1001;
}

/* 透明桥接区域，防止鼠标从按钮移到菜单时丢失hover */
.nav-user-menu::before {
    content: '';
    position: absolute;
    top: -10px;
    left: 0;
    right: 0;
    height: 10px;
    background: transparent;
}

.nav-user-dropdown:hover .nav-user-menu { display: block; }

.nav-user-menu a {
    display: block;
    color: var(--text-primary);
    padding: 10px 16px;
    text-decoration: none;
    font-size: 14px;
    transition: var(--transition);
}

.nav-user-menu a:hover {
    background: rgba(0, 240, 255, 0.06);
    color: var(--neon-cyan);
}

/* ===== 扫描线效果 ===== */
.hero::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 100%;
    background: linear-gradient(180deg, transparent 0%, transparent 49%, rgba(0, 240, 255, 0.03) 50%, transparent 51%, transparent 100%);
    background-size: 100% 4px;
    pointer-events: none;
    z-index: 1;
    opacity: 0.5;
}

/* ===== 解决方案合并(痛点→方案) ===== */
.solution-merge-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    margin-bottom: 40px;
}
.solution-merge-card {
    background: var(--bg-glass);
    backdrop-filter: blur(16px);
    border: 1px solid var(--border-glass);
    border-radius: 16px;
    padding: 24px;
    display: flex;
    flex-direction: column;
    gap: 12px;
    transition: all 0.3s;
}
.solution-merge-card:hover {
    border-color: rgba(0, 240, 255, 0.4);
    box-shadow: 0 0 24px rgba(0, 240, 255, 0.1);
    transform: translateY(-2px);
}
.sm-pain {
    font-size: 16px;
    color: rgba(255, 255, 255, 0.7);
    line-height: 1.5;
}
.sm-arrow {
    font-size: 20px;
    color: var(--neon-cyan);
    text-shadow: 0 0 12px rgba(0, 240, 255, 0.4);
}
.sm-fix {
    font-size: 15px;
    color: rgba(255, 255, 255, 0.9);
    line-height: 1.6;
}
.sm-fix strong {
    color: var(--neon-gold);
    text-shadow: 0 0 12px rgba(251, 191, 36, 0.3);
}
.solution-cta-row {
    display: flex;
    justify-content: center;
    gap: 16px;
    flex-wrap: wrap;
}

/* ===== 课程平铺 ===== */
.curriculum-flat {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 20px;
}
.cur-block {
    background: var(--bg-glass);
    backdrop-filter: blur(16px);
    border: 1px solid var(--border-glass);
    border-radius: 16px;
    padding: 24px;
    transition: all 0.3s;
}
.cur-block:hover {
    border-color: rgba(0, 240, 255, 0.4);
    box-shadow: 0 0 24px rgba(0, 240, 255, 0.1);
    transform: translateY(-4px);
}
.cur-block-header {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 16px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--border-glass);
}
.cur-block-icon { font-size: 28px; }
.cur-block-header h3 {
    font-size: 17px;
    font-weight: 700;
    color: #fff;
    margin: 0;
}
.cur-block-list {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: 10px;
}
.cur-block-list li {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.75);
    line-height: 1.5;
    padding-left: 16px;
    position: relative;
}
.cur-block-list li::before {
    content: '▹';
    position: absolute;
    left: 0;
    color: var(--neon-cyan);
}

/* ===== 工具箱精简 ===== */
.toolkit-compact {
    display: grid;
    grid-template-columns: 300px 1fr;
    gap: 40px;
    align-items: center;
}
.toolkit-compact-left {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 20px;
}
.toolkit-specs-mini {
    display: flex;
    flex-direction: column;
    gap: 8px;
    width: 100%;
}
.spec-mini {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    color: rgba(255, 255, 255, 0.7);
    padding: 8px 12px;
    background: var(--bg-glass);
    border-radius: 8px;
    border: 1px solid var(--border-glass);
}
.toolkit-compact-right {
    display: flex;
    flex-direction: column;
    gap: 20px;
}
.toolkit-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}
.tk-tag {
    padding: 8px 16px;
    background: var(--bg-glass);
    border: 1px solid var(--border-glass);
    border-radius: 20px;
    font-size: 14px;
    color: rgba(255, 255, 255, 0.85);
    transition: all 0.3s;
}
.tk-tag:hover {
    border-color: var(--neon-cyan);
    color: var(--neon-cyan);
    box-shadow: 0 0 12px rgba(0, 240, 255, 0.2);
}
.toolkit-banner-compact {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 20px 24px;
    background: linear-gradient(135deg, rgba(255, 107, 53, 0.1), rgba(251, 191, 36, 0.1));
    border: 1px solid rgba(255, 107, 53, 0.3);
    border-radius: 12px;
}
.toolkit-banner-compact span {
    font-size: 16px;
    font-weight: 600;
    color: var(--neon-gold);
}

/* ===== 报名咨询(微信二维码) ===== */
.contact-section {
    background: linear-gradient(180deg, var(--bg-dark) 0%, var(--bg-deep) 100%);
}
.contact-wrapper {
    display: grid;
    grid-template-columns: 1fr 400px;
    gap: 60px;
    align-items: center;
}
.contact-title {
    font-size: 36px;
    font-weight: 800;
    color: #fff;
    line-height: 1.3;
    margin: 16px 0 20px;
}
.contact-desc {
    font-size: 16px;
    color: rgba(255, 255, 255, 0.7);
    line-height: 1.7;
    margin-bottom: 28px;
}
.contact-steps {
    display: flex;
    flex-direction: column;
    gap: 14px;
    margin-bottom: 28px;
}
.contact-step {
    display: flex;
    align-items: center;
    gap: 12px;
}
.cs-num {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background: var(--grad-cyan-purple);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    font-weight: 700;
    flex-shrink: 0;
}
.cs-text {
    font-size: 15px;
    color: rgba(255, 255, 255, 0.85);
}
.contact-phone {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 16px;
    color: rgba(255, 255, 255, 0.6);
}
.contact-phone-num {
    color: var(--neon-cyan);
    font-weight: 700;
    font-size: 20px;
    text-shadow: 0 0 12px rgba(0, 240, 255, 0.3);
}

/* QR卡片 */
.qr-card {
    background: #fff;
    border-radius: 20px;
    padding: 28px;
    text-align: center;
    box-shadow: 0 20px 60px rgba(0, 240, 255, 0.15);
}
.qr-header {
    margin-bottom: 16px;
}
.qr-badge {
    display: inline-block;
    padding: 4px 16px;
    background: #07c160;
    color: #fff;
    border-radius: 20px;
    font-size: 13px;
    font-weight: 600;
}
.qr-image-area {
    width: 280px;
    height: 280px;
    margin: 0 auto 16px;
    border-radius: 12px;
    overflow: hidden;
    background: #f5f5f5;
    display: flex;
    align-items: center;
    justify-content: center;
}
.qr-image-area img {
    width: 100%;
    height: 100%;
    object-fit: contain;
}
.qr-placeholder {
    text-align: center;
    color: #999;
}
.qr-placeholder .qr-icon {
    font-size: 48px;
    display: block;
    margin-bottom: 8px;
}
.qr-placeholder p {
    font-size: 15px;
    color: #666;
    margin: 4px 0;
}
.qr-placeholder-sub {
    font-size: 13px !important;
    color: #bbb !important;
}
.qr-info {
    text-align: center;
}
.qr-wechat-id {
    font-size: 15px;
    color: #333;
    font-weight: 600;
    margin: 0 0 4px;
}
.qr-tip {
    font-size: 13px;
    color: #999;
    margin: 0;
}

/* ===== 微信客服弹窗 ===== */
.contact-modal {
    position: fixed;
    inset: 0;
    z-index: 10000;
    display: flex;
    align-items: center;
    justify-content: center;
}
.contact-modal-overlay {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(8px);
}
.contact-modal-box {
    position: relative;
    background: #fff;
    border-radius: 20px;
    padding: 36px;
    max-width: 420px;
    width: 90%;
    text-align: center;
    box-shadow: 0 20px 80px rgba(0, 240, 255, 0.2);
    animation: modalIn 0.3s ease;
}
@keyframes modalIn {
    from { opacity: 0; transform: scale(0.9) translateY(20px); }
    to { opacity: 1; transform: scale(1) translateY(0); }
}
.contact-modal-close {
    position: absolute;
    top: 12px;
    right: 16px;
    background: none;
    border: none;
    font-size: 22px;
    color: #999;
    cursor: pointer;
    width: 32px;
    height: 32px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s;
}
.contact-modal-close:hover {
    background: #f0f0f0;
    color: #333;
}
.contact-modal-box h3 {
    font-size: 22px;
    color: #333;
    margin: 0 0 8px;
}
.contact-modal-desc {
    font-size: 14px;
    color: #999;
    margin: 0 0 20px;
}
.contact-modal-qr {
    width: 240px;
    height: 240px;
    margin: 0 auto 20px;
    border-radius: 12px;
    overflow: hidden;
    background: #f5f5f5;
    display: flex;
    align-items: center;
    justify-content: center;
}
.contact-modal-qr img {
    width: 100%;
    height: 100%;
    object-fit: contain;
}
.contact-modal-info {
    text-align: left;
    padding: 16px;
    background: #f8f8f8;
    border-radius: 12px;
}
.contact-modal-info p {
    font-size: 14px;
    color: #555;
    margin: 0 0 6px;
}
.contact-modal-tip {
    font-size: 13px !important;
    color: #07c160 !important;
    margin-top: 8px !important;
}

/* ===== 精简页脚 ===== */
.footer-simple {
    display: grid;
    grid-template-columns: 1fr auto;
    gap: 40px;
    align-items: center;
    padding-bottom: 24px;
    border-bottom: 1px solid var(--border-glass);
}
.footer-links-row {
    display: flex;
    gap: 24px;
    flex-wrap: wrap;
}
.footer-links-row a {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.6);
    text-decoration: none;
    transition: color 0.3s;
}
.footer-links-row a:hover {
    color: var(--neon-cyan);
}

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
    .hero-container { grid-template-columns: 1fr; }
    .hero-visual { display: none; }
    .toolkit-showcase { grid-template-columns: 1fr; }
    .toolkit-usb { position: static; }
    .footer-simple { grid-template-columns: 1fr; }
    .solution-merge-grid { grid-template-columns: 1fr 1fr; }
    .curriculum-flat { grid-template-columns: 1fr 1fr 1fr; }
    .toolkit-compact { grid-template-columns: 1fr; }
    .contact-wrapper { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
    .nav-menu {
        display: none;
        position: fixed;
        top: 70px;
        left: 0;
        width: 100%;
        background: rgba(3, 6, 16, 0.95);
        backdrop-filter: blur(20px);
        flex-direction: column;
        padding: 20px;
        gap: 4px;
        border-bottom: 1px solid var(--border-glass);
        box-shadow: 0 8px 32px rgba(0, 0, 0, 0.5);
    }
    .nav-menu.active { display: flex; }
    .nav-cta { display: none; }
    #nav-user { margin-right: 8px; }
    #nav-user .nav-login-btn { padding: 6px 10px; font-size: 13px; }
    #nav-user .nav-register-btn { padding: 6px 10px; font-size: 13px; }
    .nav-toggle { display: flex; }

    .hero { padding: 100px 0 60px; }
    .hero-title { font-size: 34px; }
    .hero-desc { font-size: 16px; }
    .hero-stats { grid-template-columns: 1fr 1fr; gap: 16px; }
    .hero-stat-num { font-size: 28px; }

    .section { padding: 60px 0; }
    .section-title { font-size: 28px; }
    .section-subtitle { font-size: 15px; }

    .solution-merge-grid { grid-template-columns: 1fr; }
    .curriculum-flat { grid-template-columns: 1fr; }
    .toolkit-compact { grid-template-columns: 1fr; }
    .contact-wrapper { grid-template-columns: 1fr; gap: 30px; }
    .qr-card { max-width: 320px; margin: 0 auto; }
    .qr-image-area { width: 220px; height: 220px; }
    .footer-simple { grid-template-columns: 1fr; text-align: center; }
    .footer-links-row { justify-content: center; }
    .solution-cta-row { flex-direction: column; }
    .solution-cta-row .btn { width: 100%; }
    .toolkit-banner-compact { flex-direction: column; gap: 12px; text-align: center; }

    .float-cta { bottom: 16px; right: 16px; padding: 12px 18px; font-size: 14px; }

    .ref-stats-row { grid-template-columns: repeat(2, 1fr); }
    .ref-psych-grid { grid-template-columns: repeat(2, 1fr); }
    .ref-example-grid { grid-template-columns: 1fr; }
}

/* ========================================
   推广赚钱 V3.0 佣金系统
   ======================================== */

/* 数据卡片行 */
.ref-stats-row {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
    margin: 40px 0 50px;
}

.ref-stat-card {
    background: var(--bg-card);
    border: 1px solid var(--border-card);
    border-radius: 16px;
    padding: 28px 20px;
    text-align: center;
    transition: transform 0.3s, box-shadow 0.3s, border-color 0.3s;
    position: relative;
    overflow: hidden;
}

.ref-stat-card::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 3px;
}

.ref-stat-card:nth-child(1)::before { background: var(--grad-green-cyan); }
.ref-stat-card:nth-child(2)::before { background: var(--grad-purple-pink); }
.ref-stat-card:nth-child(3)::before { background: var(--grad-orange-gold); }
.ref-stat-card:nth-child(4)::before { background: var(--grad-cyan-purple); }

.ref-stat-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-card-hover);
    border-color: rgba(0, 240, 255, 0.2);
}

.ref-stat-num {
    font-size: 32px;
    font-weight: 800;
    margin-bottom: 8px;
    line-height: 1.2;
}

.gradient-text-green  { background: var(--grad-green-cyan); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.gradient-text-purple { background: var(--grad-purple-pink); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.gradient-text-orange { background: var(--grad-orange-gold); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.gradient-text-cyan   { background: var(--grad-cyan-purple); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }

.ref-stat-desc {
    font-size: 14px;
    color: var(--text-secondary);
}

/* 子标题 */
.ref-subtitle {
    font-size: 22px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 24px;
    text-align: center;
}

/* 阶梯天梯表格 */
.ref-ladder {
    margin: 60px 0;
}

.ref-table-wrap {
    overflow-x: auto;
    border-radius: 16px;
    border: 1px solid var(--border-card);
    background: var(--bg-card);
}

.ref-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 14px;
}

.ref-table th {
    background: rgba(0, 240, 255, 0.06);
    color: var(--neon-cyan);
    padding: 14px 12px;
    text-align: center;
    font-weight: 600;
    white-space: nowrap;
    border-bottom: 1px solid var(--border-glass);
}

.ref-table td {
    padding: 14px 12px;
    text-align: center;
    color: var(--text-primary);
    border-bottom: 1px solid rgba(255,255,255,0.04);
    white-space: nowrap;
}

.ref-table tbody tr:hover {
    background: rgba(0, 240, 255, 0.04);
}

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

.ref-highlight {
    color: var(--neon-gold) !important;
    font-weight: 700;
    font-size: 15px;
}

.ref-table-note {
    text-align: center;
    margin-top: 16px;
    color: var(--text-secondary);
    font-size: 14px;
}

.ref-table-note strong {
    color: var(--neon-gold);
}

/* 等级徽章 */
.tier-badge {
    display: inline-block;
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 13px;
    font-weight: 600;
}

.tier-bronze  { background: rgba(205, 127, 50, 0.2); color: #cd7f32; }
.tier-silver  { background: rgba(192, 192, 192, 0.2); color: #c0c0c0; }
.tier-gold    { background: rgba(255, 215, 0, 0.2); color: #ffd700; }
.tier-diamond { background: rgba(185, 242, 255, 0.2); color: #b9f2ff; }

/* 八大心理学网格 */
.ref-psychology {
    margin: 60px 0;
}

.ref-psych-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 16px;
}

.ref-psych-card {
    background: var(--bg-card);
    border: 1px solid var(--border-card);
    border-radius: 14px;
    padding: 22px 18px;
    text-align: center;
    transition: transform 0.3s, border-color 0.3s;
}

.ref-psych-card:hover {
    transform: translateY(-3px);
    border-color: var(--border-glow);
}

.ref-psych-icon {
    font-size: 32px;
    margin-bottom: 10px;
}

.ref-psych-title {
    font-size: 15px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 6px;
}

.ref-psych-desc {
    font-size: 13px;
    color: var(--text-secondary);
    line-height: 1.5;
}

/* 收益模拟 */
.ref-example {
    margin: 60px 0 40px;
}

.ref-example-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.ref-example-card {
    background: var(--bg-card);
    border: 1px solid var(--border-card);
    border-radius: 16px;
    padding: 28px 22px;
    text-align: center;
    transition: transform 0.3s, box-shadow 0.3s;
}

.ref-example-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-card-hover);
}

.ref-example-card-hot {
    border-color: var(--neon-orange);
    position: relative;
}

.ref-example-card-hot::after {
    content: '🔥 最热门';
    position: absolute;
    top: -12px;
    right: 20px;
    background: var(--grad-orange-gold);
    color: #000;
    padding: 4px 12px;
    border-radius: 12px;
    font-size: 12px;
    font-weight: 700;
}

.ref-example-label {
    font-size: 14px;
    color: var(--text-secondary);
    margin-bottom: 10px;
}

.ref-example-earn {
    font-size: 32px;
    font-weight: 800;
    color: var(--neon-gold);
    margin-bottom: 8px;
}

.ref-example-detail {
    font-size: 13px;
    color: var(--text-muted);
}

/* 响应式 */
@media (max-width: 768px) {
    .ref-stats-row { grid-template-columns: repeat(2, 1fr); }
    .ref-psych-grid { grid-template-columns: repeat(2, 1fr); }
    .ref-example-grid { grid-template-columns: 1fr; }
    .mobile-hide { display: none; }
}