/* ============================================
   上班搭子 — Apple 极简风格
   浅色主题 · 毛玻璃 · 大量留白
   ============================================ */

/* ---------- CSS 变量 ---------- */
:root {
    --bg-primary: #ffffff;
    --bg-secondary: #f5f5f7;
    --bg-tertiary: #fafafa;
    --bg-card: #ffffff;
    --bg-card-hover: #fafafa;
    --bg-glass: rgba(255, 255, 255, 0.72);
    --bg-glass-strong: rgba(255, 255, 255, 0.85);

    --text-primary: #1d1d1f;
    --text-secondary: #6e6e73;
    --text-tertiary: #aeaeb2;
    --text-link: #0066cc;

    --accent: #0066cc;
    --accent-light: #3399ff;
    --accent-glow: rgba(0, 102, 204, 0.15);
    --accent-gradient: linear-gradient(135deg, #8b5cf6 0%, #6366f1 40%, #3b82f6 100%);

    --border-color: rgba(0, 0, 0, 0.06);
    --border-hover: rgba(0, 0, 0, 0.12);

    --shadow-sm: 0 1px 3px rgba(0,0,0,0.04);
    --shadow-md: 0 4px 16px rgba(0,0,0,0.06);
    --shadow-lg: 0 8px 40px rgba(0,0,0,0.08);
    --shadow-glass: 0 8px 32px rgba(0,0,0,0.04);

    --font-sans: 'Inter', 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'SF Pro Display', sans-serif;
    --max-width: 1100px;
    --nav-height: 52px;
    --radius-sm: 10px;
    --radius-md: 16px;
    --radius-lg: 24px;
    --radius-xl: 28px;
}

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

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

body {
    font-family: var(--font-sans);
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.55;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

a {
    text-decoration: none;
    color: inherit;
}

img {
    max-width: 100%;
    display: block;
}

.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 28px;
}

/* ---------- 导航栏 — 毛玻璃 ---------- */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    transition: all 0.35s cubic-bezier(0.25, 0.1, 0.25, 1);
    padding: 0 24px;
    height: var(--nav-height);
    background: var(--bg-glass);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    border-bottom: 1px solid transparent;
}

.navbar.scrolled {
    border-bottom: 1px solid var(--border-color);
    box-shadow: 0 1px 3px rgba(0,0,0,0.02);
}

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

.nav-logo {
    display: flex;
    align-items: center;
    gap: 7px;
    font-size: 1.05rem;
    font-weight: 600;
    letter-spacing: -0.01em;
}

.logo-text {
    background: linear-gradient(135deg, #8b5cf6 0%, #3b82f6 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-weight:bold;
}

.logo-icon {
    font-size: 1.3rem;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 36px;
}

.nav-menu a {
    font-size: 0.8rem;
    font-weight: 450;
    color: var(--text-secondary);
    transition: color 0.2s ease;
    letter-spacing: -0.01em;
}

.nav-menu a:hover {
    color: var(--text-primary);
}

.btn-download-nav {
    padding: 7px 18px;
    background: linear-gradient(135deg, #8b5cf6 0%, #3b82f6 100%);
    color: #fff;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 500;
    transition: all 0.25s ease;
    white-space: nowrap;
    letter-spacing: -0.01em;
}

.btn-download-nav:hover {
    background: linear-gradient(135deg, #7c3aed 0%, #2563eb 100%);
    box-shadow: 0 4px 14px rgba(99, 102, 241, 0.35);
    transform: scale(1.03);
}

/* 移动端菜单按钮 */
.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
    z-index: 1001;
}

.mobile-menu-btn span {
    display: block;
    width: 20px;
    height: 1.5px;
    background: var(--text-primary);
    border-radius: 1px;
    transition: all 0.3s ease;
}

.mobile-menu-btn.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}
.mobile-menu-btn.active span:nth-child(2) {
    opacity: 0;
}
.mobile-menu-btn.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

.mobile-menu {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    background: rgba(255, 255, 255, 0.96);
    backdrop-filter: blur(30px);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 32px;
    z-index: 999;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.35s ease;
}

.mobile-menu.active {
    opacity: 1;
    pointer-events: auto;
}

.mobile-menu a {
    font-size: 1.3rem;
    color: var(--text-primary);
    font-weight: 500;
    letter-spacing: -0.02em;
    transition: opacity 0.2s;
}

.mobile-menu a:hover {
    opacity: 0.7;
}

.mobile-download-btn {
    margin-top: 8px;
    padding: 12px 36px;
    background: linear-gradient(135deg, #8b5cf6 0%, #3b82f6 100%);
    color: #fff !important;
    border-radius: 24px;
    font-weight: 500;
}

/* ---------- Hero 主视觉 ---------- */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    padding: 120px 24px 80px;
    background: var(--bg-primary);
}

.hero-bg {
    position: absolute;
    inset: 0;
    z-index: 0;
    pointer-events: none;
}

.hero-glow {
    position: absolute;
    border-radius: 50%;
    filter: blur(120px);
    opacity: 0.12;
}

.glow-1 {
    width: 500px;
    height: 500px;
    background: #0066cc;
    top: 10%;
    left: 50%;
    transform: translate(-50%, -50%);
    animation: glowPulse 8s ease-in-out infinite;
}

.glow-2 {
    width: 350px;
    height: 350px;
    background: #5e5ce6;
    bottom: 15%;
    right: 25%;
    animation: glowPulse 10s ease-in-out infinite reverse;
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    max-width: 750px;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 7px;
    padding: 5px 16px;
    background: rgba(0, 102, 204, 0.06);
    border: 1px solid rgba(0, 102, 204, 0.12);
    border-radius: 100px;
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--accent);
    margin-bottom: 36px;
    animation: fadeInUp 0.6s ease forwards;
    letter-spacing: -0.01em;
}

.badge-dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--accent);
    animation: pulse 2s infinite;
}

.hero-title {
    font-size: clamp(2.4rem, 5.2vw, 4.2rem);
    font-weight: 700;
    letter-spacing: -0.04em;
    line-height: 1.1;
    margin-bottom: 24px;
    animation: fadeInUp 0.6s 0.1s ease forwards;
    opacity: 0;
    color: #1d1d1f;
}

.hero-title .highlight {
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    background-size: 200% 100%;
    animation: gradientShift 4s ease infinite;
}

.hero-subtitle {
    font-size: 1.2rem;
    font-weight: 400;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 44px;
    max-width: 520px;
    margin-left: auto;
    margin-right: auto;
    animation: fadeInUp 0.6s 0.2s ease forwards;
    opacity: 0;
    letter-spacing: -0.01em;
}

.hero-cta {
    animation: fadeInUp 0.6s 0.3s ease forwards;
    opacity: 0;
}

.download-group {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 18px;
}

.btn-primary {
    display: inline-flex;
    align-items: center;
    gap: 9px;
    padding: 14px 32px;
    background: linear-gradient(135deg, #8b5cf6 0%, #3b82f6 100%);
    color: #fff;
    border: none;
    border-radius: 24px;
    font-size: 0.95rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    letter-spacing: -0.01em;
}

.btn-primary:hover {
    background: linear-gradient(135deg, #7c3aed 0%, #2563eb 100%);
    box-shadow: 0 6px 24px rgba(99, 102, 241, 0.35);
    transform: scale(1.03);
}

.btn-lg {
    padding: 16px 44px;
    font-size: 1.05rem;
    border-radius: 28px;
}

.download-options {
    display: flex;
    gap: 0;
    background: rgba(0, 0, 0, 0.03);
    border-radius: 20px;
    padding: 3px;
}

.os-option {
    padding: 7px 16px;
    border-radius: 17px;
    font-size: 0.8rem;
    font-weight: 450;
    color: var(--text-secondary);
    transition: all 0.25s ease;
    cursor: pointer;
    letter-spacing: -0.01em;
}

.os-option.active {
    background: #ffffff;
    color: var(--text-primary);
    box-shadow: 0 1px 4px rgba(0,0,0,0.06);
}

.os-option:hover:not(.active) {
    color: var(--text-primary);
}

.hero-stats {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 36px;
    margin-top: 56px;
    animation: fadeInUp 0.6s 0.4s ease forwards;
    opacity: 0;
}

.stat-item {
    text-align: center;
}

.stat-number {
    display: block;
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--accent);
    letter-spacing: -0.02em;
}

.stat-label {
    font-size: 0.78rem;
    font-weight: 400;
    color: var(--text-tertiary);
    margin-top: 2px;
}

.stat-divider {
    width: 1px;
    height: 36px;
    background: var(--border-color);
}

/* Hero 吉祥物 */
.hero-mascot {
    position: absolute;
    z-index: 0;
    pointer-events: none;
}

.mascot-circle {
    width: 130px;
    height: 130px;
    border-radius: 50%;
    background: rgba(0, 102, 204, 0.04);
    border: 1.5px solid rgba(0, 102, 204, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    position: absolute;
    top: -90px;
    right: -170px;
    animation: float 6s ease-in-out infinite;
}

.mascot-emoji {
    font-size: 2.8rem;
    animation: float 4s ease-in-out infinite;
}

.mascot-float {
    position: absolute;
    font-size: 1.4rem;
    opacity: 0.35;
    animation: floatAround 8s ease-in-out infinite;
}

.float-1 { top: -130px; right: -30px; animation-delay: 0s; }
.float-2 { top: -30px; right: -210px; animation-delay: 2s; }
.float-3 { top: 30px; right: -50px; animation-delay: 4s; }
.float-4 { top: -70px; right: -150px; animation-delay: 6s; }

/* 滚动提示 */
.scroll-hint {
    position: absolute;
    bottom: 36px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    color: var(--text-tertiary);
    font-size: 0.75rem;
    z-index: 1;
    animation: fadeInUp 0.6s 0.5s ease forwards;
    opacity: 0;
    font-weight: 450;
}

.scroll-mouse {
    width: 20px;
    height: 30px;
    border: 1.5px solid var(--text-tertiary);
    border-radius: 10px;
    display: flex;
    justify-content: center;
    padding-top: 5px;
}

.scroll-wheel {
    width: 2.5px;
    height: 7px;
    background: var(--text-tertiary);
    border-radius: 2px;
    animation: scrollWheel 2s ease-in-out infinite;
}

/* ---------- 产品展示图 ---------- */
.showcase {
    padding: 0 0 48px;
    position: relative;
    z-index: 1;
    background: var(--bg-primary);
}

.showcase-image-wrapper {
    max-width: 960px;
    margin: 0 auto;
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--border-color);
    transition: all 0.4s cubic-bezier(0.25, 0.1, 0.25, 1);
}

.showcase-image-wrapper:hover {
    box-shadow: 0 16px 56px rgba(0, 0, 0, 0.12);
    transform: translateY(-4px);
}

.showcase-image {
    width: 100%;
    height: auto;
    display: block;
}

/* ---------- 邀请区 ---------- */
.invite {
    padding: 32px 0 32px;
    position: relative;
    z-index: 1;
    background: var(--bg-secondary);
}

.invite-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    padding: 28px 36px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
    flex-wrap: wrap;
    box-shadow: var(--shadow-sm);
}

.invite-left {
    display: flex;
    align-items: center;
    gap: 16px;
}

.invite-avatar {
    font-size: 2rem;
}

.invite-text h3 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 3px;
    letter-spacing: -0.01em;
}

.invite-text p {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.invite-right {
    text-align: center;
}

.points-display {
    display: flex;
    align-items: baseline;
    gap: 6px;
    margin-bottom: 3px;
}

.points-number {
    font-size: 1.7rem;
    font-weight: 800;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: -0.03em;
}

.points-label {
    font-size: 0.85rem;
    color: var(--text-primary);
    font-weight: 500;
}

.points-hint {
    font-size: 0.75rem;
    color: var(--text-tertiary);
}

.btn-invite-copy {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 10px 20px;
    background: linear-gradient(135deg, #8b5cf6 0%, #3b82f6 100%);
    border: none;
    color: #fff;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.25s ease;
    font-family: inherit;
    letter-spacing: -0.01em;
}

.btn-invite-copy:hover {
    background: linear-gradient(135deg, #7c3aed 0%, #2563eb 100%);
    box-shadow: 0 4px 14px rgba(99, 102, 241, 0.35);
    transform: scale(1.03);
}

/* ---------- Section 通用 ---------- */
.section-header {
    text-align: center;
    margin-bottom: 72px;
}

.section-tag {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.06em;
    color: var(--accent);
    text-transform: uppercase;
    margin-bottom: 16px;
}

.section-title {
    font-size: clamp(2rem, 4vw, 3.2rem);
    font-weight: 700;
    letter-spacing: -0.03em;
    margin-bottom: 16px;
    line-height: 1.2;
    color: #1d1d1f;
}

.section-desc {
    font-size: 1.08rem;
    font-weight: 400;
    color: var(--text-secondary);
    max-width: 480px;
    margin: 0 auto;
    line-height: 1.65;
    letter-spacing: -0.01em;
}

/* ---------- 功能优势 ---------- */
.features {
    padding: 120px 0;
    position: relative;
    z-index: 1;
    background: var(--bg-primary);
}

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

.feature-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    padding: 44px 32px;
    transition: all 0.4s cubic-bezier(0.25, 0.1, 0.25, 1);
    position: relative;
    overflow: hidden;
}

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

.feature-icon {
    width: 48px;
    height: 48px;
    color: var(--accent);
    margin-bottom: 24px;
    opacity: 0.8;
    transition: all 0.4s ease;
}

.feature-card:hover .feature-icon {
    opacity: 1;
    transform: scale(1.08);
}

.feature-card h3 {
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 10px;
    letter-spacing: -0.02em;
}

.feature-card p {
    font-size: 0.92rem;
    font-weight: 400;
    color: var(--text-secondary);
    line-height: 1.65;
}

.feature-card-image {
    width: 100%;
    height: auto;
    border-radius: var(--radius-md);
    margin-top: 16px;
    object-fit: cover;
}

/* ---------- 快速上手 ---------- */
.how-it-works {
    padding: 120px 0;
    position: relative;
    z-index: 1;
    background: var(--bg-secondary);
}

.steps-container {
    display: flex;
    align-items: flex-start;
    justify-content: center;
    gap: 0;
    max-width: 860px;
    margin: 0 auto;
}

.step-item {
    text-align: center;
    flex: 1;
    max-width: 210px;
}

.step-number {
    font-size: 0.72rem;
    font-weight: 700;
    color: var(--accent);
    letter-spacing: 0.08em;
    margin-bottom: 20px;
}

.step-icon {
    width: 68px;
    height: 68px;
    margin: 0 auto 24px;
    color: var(--accent);
    background: rgba(0, 102, 204, 0.04);
    border-radius: 20px;
    padding: 14px;
    transition: all 0.35s ease;
}

.step-item:hover .step-icon {
    background: rgba(0, 102, 204, 0.08);
    transform: scale(1.06);
}

.step-item h3 {
    font-size: 1.12rem;
    font-weight: 600;
    margin-bottom: 8px;
    letter-spacing: -0.02em;
}

.step-item p {
    font-size: 0.88rem;
    font-weight: 400;
    color: var(--text-secondary);
    line-height: 1.55;
}

.step-connector {
    display: flex;
    align-items: center;
    padding-top: 55px;
    flex-shrink: 0;
}

.connector-line {
    width: 36px;
    height: 1.5px;
    background: linear-gradient(90deg, var(--border-color), var(--accent));
    border-radius: 1px;
}

.connector-arrow {
    color: var(--accent);
    font-size: 1.1rem;
    margin-left: 3px;
    font-weight: 300;
}

/* ---------- 使用场景 ---------- */
.scenarios {
    padding: 120px 0;
    position: relative;
    z-index: 1;
    background: var(--bg-primary);
}

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

.scenario-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    padding: 28px;
    transition: all 0.35s cubic-bezier(0.25, 0.1, 0.25, 1);
}

.scenario-card:hover {
    box-shadow: var(--shadow-md);
    border-color: transparent;
    transform: translateY(-3px);
}

.scenario-chat {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin-bottom: 18px;
}

.chat-bubble {
    display: flex;
    gap: 8px;
    align-items: flex-start;
}

.chat-avatar {
    font-size: 1.1rem;
    flex-shrink: 0;
    width: 30px;
    height: 30px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-secondary);
    border-radius: 50%;
}

.chat-content {
    padding: 10px 15px;
    border-radius: 14px;
    font-size: 0.84rem;
    line-height: 1.5;
    max-width: 82%;
    font-weight: 400;
}

.chat-bubble.user .chat-content {
    background: var(--bg-secondary);
    border-top-left-radius: 4px;
    color: var(--text-primary);
}

.chat-bubble.ai .chat-content {
    background: rgba(0, 102, 204, 0.06);
    border: 1px solid rgba(0, 102, 204, 0.1);
    border-top-left-radius: 4px;
    color: var(--text-primary);
}

.scenario-label {
    display: flex;
    align-items: center;
    gap: 8px;
    padding-top: 14px;
    border-top: 1px solid var(--border-color);
    font-size: 0.82rem;
    font-weight: 500;
    color: var(--text-secondary);
}

.scenario-emoji {
    font-size: 0.95rem;
}

/* ---------- 用户评价 ---------- */
.testimonials {
    padding: 120px 0;
    position: relative;
    z-index: 1;
    background: var(--bg-secondary);
}

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

.testimonial-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    padding: 36px 28px;
    transition: all 0.35s cubic-bezier(0.25, 0.1, 0.25, 1);
}

.testimonial-card:hover {
    box-shadow: var(--shadow-md);
    border-color: transparent;
    transform: translateY(-3px);
}

.testimonial-stars {
    color: #f59e0b;
    font-size: 0.85rem;
    letter-spacing: 2px;
    margin-bottom: 16px;
}

.testimonial-text {
    font-size: 0.95rem;
    font-weight: 400;
    color: var(--text-primary);
    line-height: 1.7;
    margin-bottom: 22px;
    letter-spacing: -0.01em;
}

.testimonial-author {
    display: flex;
    align-items: center;
    gap: 10px;
}

.author-avatar {
    font-size: 1.8rem;
}

.author-name {
    display: block;
    font-size: 0.9rem;
    font-weight: 600;
    letter-spacing: -0.01em;
}

.author-role {
    display: block;
    font-size: 0.78rem;
    font-weight: 400;
    color: var(--text-tertiary);
}

/* ---------- FAQ ---------- */
.faq {
    padding: 120px 0;
    position: relative;
    z-index: 1;
    background: var(--bg-primary);
}

.faq-list {
    max-width: 680px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.faq-item {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: all 0.3s ease;
}

.faq-item:hover {
    border-color: var(--border-hover);
}

.faq-question {
    width: 100%;
    padding: 22px 28px;
    background: none;
    border: none;
    color: var(--text-primary);
    font-size: 0.95rem;
    font-weight: 500;
    display: flex;
    justify-content: space-between;
    align-items: center;
    cursor: pointer;
    text-align: left;
    font-family: inherit;
    gap: 16px;
    letter-spacing: -0.01em;
}

.faq-arrow {
    width: 20px;
    height: 20px;
    flex-shrink: 0;
    transition: transform 0.3s ease;
    color: var(--text-tertiary);
}

.faq-item.active .faq-arrow {
    transform: rotate(180deg);
    color: var(--accent);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease, padding 0.4s ease;
}

.faq-item.active .faq-answer {
    max-height: 200px;
}

.faq-answer p {
    padding: 0 28px 22px;
    font-size: 0.9rem;
    font-weight: 400;
    color: var(--text-secondary);
    line-height: 1.65;
}

/* ---------- 套餐订阅 ---------- */
.pricing {
    padding: 120px 0;
    position: relative;
    z-index: 1;
    background: var(--bg-secondary);
}

.pricing-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    margin-bottom: 56px;
    animation: fadeInUp 0.6s 0.1s ease forwards;
    opacity: 0;
}

.toggle-label {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-tertiary);
    cursor: pointer;
    transition: color 0.25s ease;
    letter-spacing: -0.01em;
}

.toggle-label.active {
    color: var(--text-primary);
}

.toggle-switch {
    position: relative;
    width: 48px;
    height: 28px;
    background: rgba(0, 0, 0, 0.08);
    border: none;
    border-radius: 14px;
    cursor: pointer;
    transition: background 0.3s ease;
    padding: 0;
}

.toggle-switch.active {
    background: linear-gradient(135deg, #8b5cf6 0%, #3b82f6 100%);
}

.toggle-knob {
    position: absolute;
    top: 3px;
    left: 3px;
    width: 22px;
    height: 22px;
    background: #fff;
    border-radius: 50%;
    transition: transform 0.3s cubic-bezier(0.25, 0.1, 0.25, 1);
    box-shadow: 0 1px 4px rgba(0, 0, 0, 0.15);
}

.toggle-switch.active .toggle-knob {
    transform: translateX(20px);
}

.toggle-badge {
    display: inline-flex;
    align-items: center;
    padding: 3px 10px;
    background: rgba(139, 92, 246, 0.08);
    border: 1px solid rgba(139, 92, 246, 0.15);
    border-radius: 100px;
    font-size: 0.72rem;
    font-weight: 600;
    color: #8b5cf6;
    letter-spacing: -0.01em;
}

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

.pricing-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    padding: 44px 36px;
    position: relative;
    transition: all 0.4s cubic-bezier(0.25, 0.1, 0.25, 1);
    display: flex;
    flex-direction: column;
}

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

.pricing-card-popular {
    border-color: transparent;
    background: var(--bg-card);
    box-shadow: var(--shadow-md), 0 0 0 1px rgba(139, 92, 246, 0.1);
    padding-top: 56px;
}

.pricing-card-popular:hover {
    box-shadow: 0 16px 48px rgba(99, 102, 241, 0.12), 0 0 0 1.5px rgba(139, 92, 246, 0.2);
}

.pricing-popular-badge {
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    padding: 6px 20px;
    background: linear-gradient(135deg, #8b5cf6 0%, #3b82f6 100%);
    color: #fff;
    font-size: 0.75rem;
    font-weight: 600;
    border-radius: 0 0 12px 12px;
    letter-spacing: 0.02em;
}

.pricing-card-header {
    margin-bottom: 28px;
}

.pricing-icon {
    font-size: 2rem;
    margin-bottom: 16px;
}

.pricing-name {
    font-size: 1.3rem;
    font-weight: 700;
    margin-bottom: 6px;
    letter-spacing: -0.02em;
    color: var(--text-primary);
}

.pricing-desc {
    font-size: 0.85rem;
    color: var(--text-secondary);
    font-weight: 400;
}

.pricing-price {
    display: flex;
    align-items: baseline;
    gap: 4px;
    margin-bottom: 32px;
    padding-bottom: 28px;
    border-bottom: 1px solid var(--border-color);
}

.price-amount {
    font-size: 2.8rem;
    font-weight: 800;
    letter-spacing: -0.04em;
    line-height: 1;
    background: linear-gradient(135deg, #8b5cf6 0%, #3b82f6 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.price-period {
    font-size: 0.85rem;
    color: var(--text-tertiary);
    font-weight: 400;
}

.pricing-features {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 14px;
    margin-bottom: 36px;
    flex: 1;
}

.pricing-features li {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 0.88rem;
    font-weight: 400;
    line-height: 1.4;
}

.pricing-features li.included {
    color: var(--text-primary);
}

.pricing-features li.included svg {
    color: #8b5cf6;
    flex-shrink: 0;
}

.pricing-features li.excluded {
    color: var(--text-tertiary);
}

.pricing-features li.excluded svg {
    color: var(--text-tertiary);
    flex-shrink: 0;
    opacity: 0.5;
}

.btn-pricing {
    display: block;
    text-align: center;
    padding: 14px 28px;
    border-radius: 24px;
    font-size: 0.92rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    letter-spacing: -0.01em;
    text-decoration: none;
}

.btn-pricing-free {
    background: rgba(0, 0, 0, 0.04);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.btn-pricing-free:hover {
    background: rgba(0, 0, 0, 0.07);
    transform: scale(1.02);
}

.btn-pricing-pro {
    background: linear-gradient(135deg, #8b5cf6 0%, #3b82f6 100%);
    color: #fff;
    border: none;
}

.btn-pricing-pro:hover {
    background: linear-gradient(135deg, #7c3aed 0%, #2563eb 100%);
    box-shadow: 0 6px 24px rgba(99, 102, 241, 0.35);
    transform: scale(1.03);
}

.btn-pricing-team {
    background: linear-gradient(135deg, #8b5cf6 0%, #3b82f6 100%);
    color: #fff;
    border: none;
}

.btn-pricing-team:hover {
    background: linear-gradient(135deg, #7c3aed 0%, #2563eb 100%);
    box-shadow: 0 6px 24px rgba(99, 102, 241, 0.35);
    transform: scale(1.03);
}

/* ---------- 底部 CTA ---------- */
.cta-bottom {
    padding: 120px 0;
    position: relative;
    z-index: 1;
    background: var(--bg-secondary);
}

.cta-card {
    text-align: center;
    padding: 80px 24px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-sm);
}

.cta-card h2 {
    font-size: clamp(1.8rem, 3.5vw, 2.6rem);
    font-weight: 700;
    margin-bottom: 12px;
    letter-spacing: -0.03em;
}

.cta-card p {
    font-size: 1.08rem;
    font-weight: 400;
    color: var(--text-secondary);
    margin-bottom: 44px;
    letter-spacing: -0.01em;
}

.cta-downloads {
    display: flex;
    justify-content: center;
    gap: 16px;
    flex-wrap: wrap;
}

.btn-download-platform {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    padding: 28px 40px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    color: var(--text-primary);
    transition: all 0.35s cubic-bezier(0.25, 0.1, 0.25, 1);
    min-width: 180px;
}

.btn-download-platform:hover {
    box-shadow: var(--shadow-lg);
    border-color: transparent;
    transform: translateY(-4px);
}

.btn-download-platform span {
    font-size: 0.95rem;
    font-weight: 600;
    letter-spacing: -0.01em;
}

.btn-download-platform small {
    font-size: 0.75rem;
    font-weight: 400;
    color: var(--text-tertiary);
}

.btn-download-platform svg {
    color: var(--accent);
}

/* ---------- 页脚 ---------- */
.footer {
    padding: 72px 0 36px;
    border-top: 1px solid var(--border-color);
    position: relative;
    z-index: 1;
    background: var(--bg-primary);
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 48px;
    margin-bottom: 48px;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 7px;
    font-size: 1.05rem;
    font-weight: 600;
    margin-bottom: 10px;
    letter-spacing: -0.01em;
}

.footer-brand p {
    font-size: 0.85rem;
    font-weight: 400;
    color: var(--text-secondary);
    max-width: 240px;
}

.footer-links h4 {
    font-size: 0.82rem;
    font-weight: 600;
    margin-bottom: 16px;
    color: var(--text-primary);
    letter-spacing: -0.01em;
}

.footer-links a {
    display: block;
    font-size: 0.82rem;
    font-weight: 400;
    color: var(--text-secondary);
    margin-bottom: 10px;
    transition: color 0.2s ease;
}

.footer-links a:hover {
    color: var(--text-link);
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 28px;
    border-top: 1px solid var(--border-color);
    flex-wrap: wrap;
    gap: 16px;
}

.footer-legal {
    display: flex;
    gap: 24px;
}

.footer-legal a {
    font-size: 0.78rem;
    font-weight: 400;
    color: var(--text-tertiary);
    transition: color 0.2s ease;
}

.footer-legal a:hover {
    color: var(--text-link);
}

.footer-copy {
    font-size: 0.78rem;
    font-weight: 400;
    color: var(--text-tertiary);
}

/* ---------- Toast ---------- */
.toast {
    position: fixed;
    top: 28px;
    left: 50%;
    transform: translateX(-50%) translateY(-120px);
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 12px 24px;
    background: var(--bg-glass-strong);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    z-index: 2000;
    transition: transform 0.45s cubic-bezier(0.25, 0.1, 0.25, 1);
    font-size: 0.88rem;
    font-weight: 450;
    box-shadow: var(--shadow-glass);
    color: var(--text-primary);
}

.toast.show {
    transform: translateX(-50%) translateY(0);
}

.toast-icon {
    font-size: 1rem;
}

/* ---------- 滚动动画 ---------- */
[data-reveal] {
    opacity: 0;
    transform: translateY(36px);
    transition: all 0.8s cubic-bezier(0.25, 0.1, 0.25, 1);
}

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

/* ---------- 关键帧动画 ---------- */
@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(24px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.3; }
}

@keyframes gradientShift {
    0%, 100% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
}

@keyframes glowPulse {
    0%, 100% { opacity: 0.08; transform: scale(1); }
    50% { opacity: 0.15; transform: scale(1.08); }
}

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

@keyframes floatAround {
    0%, 100% { transform: translate(0, 0) scale(1); opacity: 0.35; }
    25% { transform: translate(8px, -12px) scale(1.08); opacity: 0.55; }
    50% { transform: translate(0, -20px) scale(1); opacity: 0.35; }
    75% { transform: translate(-8px, -8px) scale(1.08); opacity: 0.55; }
}

@keyframes scrollWheel {
    0% { transform: translateY(0); opacity: 1; }
    100% { transform: translateY(7px); opacity: 0; }
}

/* ---------- 响应式设计 ---------- */
@media (max-width: 1024px) {
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }

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

    .testimonial-cards {
        grid-template-columns: 1fr;
        max-width: 520px;
        margin: 0 auto;
    }

    .footer-grid {
        grid-template-columns: 1fr 1fr;
        gap: 32px;
    }

    .hero-mascot {
        display: none;
    }

    .pricing-grid {
        grid-template-columns: 1fr;
        max-width: 420px;
        margin: 0 auto;
    }
}

@media (max-width: 768px) {
    .nav-menu, .nav-actions {
        display: none;
    }

    .mobile-menu-btn {
        display: flex;
    }

    .features-grid {
        grid-template-columns: 1fr;
        max-width: 380px;
        margin: 0 auto;
    }

    .scenarios-grid {
        grid-template-columns: 1fr;
        max-width: 380px;
        margin: 0 auto;
    }

    .steps-container {
        flex-direction: column;
        align-items: center;
        gap: 32px;
    }

    .step-connector {
        padding-top: 0;
        transform: rotate(90deg);
    }

    .step-item {
        max-width: 260px;
    }

    .invite-card {
        flex-direction: column;
        text-align: center;
    }

    .invite-left {
        flex-direction: column;
    }

    .hero-stats {
        gap: 24px;
    }

    .stat-number {
        font-size: 1.4rem;
    }

    .cta-downloads {
        flex-direction: column;
        align-items: center;
    }

    .btn-download-platform {
        width: 100%;
        max-width: 280px;
    }

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

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

    .footer-legal {
        justify-content: center;
    }

    .section-title {
        font-size: 1.8rem;
    }

    .pricing-grid {
        grid-template-columns: 1fr;
        max-width: 380px;
        margin: 0 auto;
    }

    .pricing-card {
        padding: 36px 28px;
    }

    .pricing-card-popular {
        padding-top: 48px;
    }

    .price-amount {
        font-size: 2.2rem;
    }
}

.pua-help {
    transform: scaleY(-1);
    display: inline-block; 

}

/* ---------- 弹窗 ---------- */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.4);
    backdrop-filter: blur(6px);
    -webkit-backdrop-filter: blur(6px);
    z-index: 3000;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease;
}

.modal-overlay.active {
    opacity: 1;
    pointer-events: auto;
}

.modal-content {
    background: var(--bg-card);
    border-radius: var(--radius-xl);
    padding: 48px 40px 36px;
    text-align: center;
    max-width: 380px;
    width: 90%;
    box-shadow: var(--shadow-lg);
    transform: scale(0.92) translateY(12px);
    transition: transform 0.35s cubic-bezier(0.25, 0.1, 0.25, 1);
}

.modal-overlay.active .modal-content {
    transform: scale(1) translateY(0);
}

.modal-icon {
    font-size: 3rem;
    margin-bottom: 20px;
}

.modal-title {
    font-size: 1.3rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    margin-bottom: 10px;
    color: var(--text-primary);
}

.modal-desc {
    font-size: 0.92rem;
    color: var(--text-secondary);
    line-height: 1.65;
    margin-bottom: 28px;
}

.modal-close-btn {
    display: inline-block;
    padding: 12px 36px;
    background: linear-gradient(135deg, #8b5cf6 0%, #3b82f6 100%);
    color: #fff;
    border: none;
    border-radius: 24px;
    font-size: 0.92rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.25s ease;
    font-family: inherit;
    letter-spacing: -0.01em;
}

.modal-close-btn:hover {
    background: linear-gradient(135deg, #7c3aed 0%, #2563eb 100%);
    box-shadow: 0 4px 16px rgba(99, 102, 241, 0.35);
    transform: scale(1.03);
}