/* ===== 基础变量 ===== */
:root {
    --bg-primary: #0a0a0a;
    --bg-secondary: #111111;
    --bg-card: rgba(255, 255, 255, 0.03);
    --text-primary: #ffffff;
    --text-secondary: #888888;
    --text-muted: #555555;
    --accent: #00ff9d;
    --accent-dim: rgba(0, 255, 157, 0.1);
    --border: rgba(255, 255, 255, 0.08);
    --border-hover: rgba(255, 255, 255, 0.15);
    --transition-smooth: cubic-bezier(0.4, 0, 0.2, 1);
}

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

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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
}

/* ===== 容器 ===== */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* ===== 导航 ===== */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 20px 0;
    transition: background-color 0.4s var(--transition-smooth), 
                backdrop-filter 0.4s var(--transition-smooth);
}

.nav.scrolled {
    background-color: rgba(10, 10, 10, 0.9);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    text-decoration: none;
    letter-spacing: -0.02em;
}

.nav-logo::after {
    content: '';
    display: inline-block;
    width: 6px;
    height: 6px;
    background-color: var(--accent);
    border-radius: 50%;
    margin-left: 4px;
    vertical-align: super;
}

.nav-links {
    display: flex;
    gap: 40px;
}

.nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    letter-spacing: 0.05em;
    transition: color 0.3s var(--transition-smooth);
    position: relative;
}

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

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 1px;
    background-color: var(--accent);
    transition: width 0.3s var(--transition-smooth);
}

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

.nav-cta {
    background-color: transparent;
    color: var(--text-primary);
    border: 1px solid var(--border);
    padding: 10px 24px;
    border-radius: 100px;
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s var(--transition-smooth);
    letter-spacing: 0.02em;
}

.nav-cta:hover {
    border-color: var(--accent);
    color: var(--accent);
    box-shadow: 0 0 20px rgba(0, 255, 157, 0.15);
}

/* ===== Hero Section ===== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    overflow: hidden;
    padding-top: 80px;
}

.hero-video-container {
    position: absolute;
    inset: 0;
    z-index: 0;
    overflow: hidden;
}

.hero-video {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    z-index: 0;
}

.hero-glass {
    position: absolute;
    inset: 0;
    background: linear-gradient(
        180deg,
        rgba(10, 10, 10, 0.3) 0%,
        rgba(10, 10, 10, 0.7) 50%,
        var(--bg-primary) 100%
    );
    backdrop-filter: blur(2px);
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    max-width: 800px;
    padding: 0 24px;
    animation: fadeInUp 1s var(--transition-smooth) forwards;
    opacity: 0;
}

@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(40px); }
    to { opacity: 1; transform: translateY(0); }
}

.hero-title {
    margin-bottom: 24px;
}

.hero-title-line {
    display: block;
    font-size: clamp(2.5rem, 6vw, 4.5rem);
    font-weight: 800;
    line-height: 1.1;
    letter-spacing: -0.03em;
}

.hero-title-accent {
    color: var(--accent);
    text-shadow: 0 0 40px rgba(0, 255, 157, 0.3);
}

.hero-subtitle {
    font-size: clamp(1rem, 2.5vw, 1.25rem);
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto 40px;
    line-height: 1.7;
    font-weight: 400;
}

.hero-cta {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    background-color: var(--accent);
    color: var(--bg-primary);
    border: none;
    padding: 16px 36px;
    border-radius: 100px;
    font-size: 1rem;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.4s var(--transition-smooth);
    letter-spacing: 0.02em;
    margin-bottom: 60px;
    position: relative;
    overflow: hidden;
}

.hero-cta::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
    transform: translateX(-100%);
    transition: transform 0.6s var(--transition-smooth);
}

.hero-cta:hover::before {
    transform: translateX(100%);
}

.hero-cta:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(0, 255, 157, 0.3);
}

.hero-cta-icon {
    width: 20px;
    height: 20px;
    transition: transform 0.3s var(--transition-smooth);
}

.hero-cta:hover .hero-cta-icon {
    transform: translateX(4px);
}

/* Hero 聊天演示 */
.hero-chat {
    display: flex;
    flex-direction: column;
    gap: 12px;
    align-items: center;
    animation: fadeInUp 1s 0.5s var(--transition-smooth) forwards;
    opacity: 0;
}

.chat-bubble {
    padding: 14px 24px;
    border-radius: 20px;
    font-size: 0.95rem;
    max-width: 400px;
    line-height: 1.5;
    position: relative;
    animation: messagePop 0.5s var(--transition-smooth) forwards;
    opacity: 0;
}

.chat-bubble-user {
    background-color: var(--bg-card);
    border: 1px solid var(--border);
    color: var(--text-secondary);
    align-self: flex-start;
    animation-delay: 1s;
}

.chat-bubble-agent {
    background-color: var(--accent-dim);
    border: 1px solid rgba(0, 255, 157, 0.2);
    color: var(--text-primary);
    align-self: flex-end;
    animation-delay: 1.5s;
}

.chat-bubble-glow {
    position: absolute;
    inset: -1px;
    border-radius: 20px;
    background: linear-gradient(135deg, rgba(0, 255, 157, 0.2), transparent);
    opacity: 0;
    animation: glowPulse 2s ease-in-out infinite;
    animation-delay: 1.5s;
    pointer-events: none;
}

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

@keyframes messagePop {
    from { opacity: 0; transform: scale(0.9) translateY(10px); }
    to { opacity: 1; transform: scale(1) translateY(0); }
}

/* 滚动提示 */
.hero-scroll {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    color: var(--text-muted);
    font-size: 0.75rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    animation: fadeInUp 1s 2s var(--transition-smooth) forwards;
    opacity: 0;
}

.hero-scroll-line {
    width: 1px;
    height: 60px;
    background: linear-gradient(to bottom, var(--text-muted), transparent);
    animation: scrollPulse 2s ease-in-out infinite;
}

@keyframes scrollPulse {
    0%, 100% { opacity: 0.3; transform: scaleY(0.8); }
    50% { opacity: 1; transform: scaleY(1); }
}

/* ===== 通用 Section ===== */
section {
    padding: 120px 0;
    position: relative;
}

.section-header {
    margin-bottom: 80px;
    text-align: center;
}

.section-tag {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--accent);
    margin-bottom: 16px;
    padding: 6px 16px;
    border: 1px solid rgba(0, 255, 157, 0.3);
    border-radius: 100px;
}

.section-title {
    font-size: clamp(2rem, 5vw, 3.5rem);
    font-weight: 800;
    line-height: 1.15;
    letter-spacing: -0.03em;
}

.section-title .accent {
    color: var(--accent);
}

/* ===== 特质 ===== */
.features {
    background-color: var(--bg-primary);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 24px;
}

.feature-card {
    background-color: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 24px;
    padding: 40px;
    position: relative;
    overflow: hidden;
    transition: all 0.5s var(--transition-smooth);
    cursor: default;
}

.feature-card:hover {
    border-color: var(--border-hover);
    transform: translateY(-4px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}

.feature-card:hover .feature-icon {
    color: var(--accent);
    transform: scale(1.1);
}

.feature-number {
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--text-muted);
    letter-spacing: 0.1em;
    margin-bottom: 16px;
}

.feature-title {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 12px;
    letter-spacing: -0.02em;
}

.feature-desc {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-bottom: 16px;
    line-height: 1.6;
}

.feature-detail {
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.7;
    padding-top: 16px;
    border-top: 1px solid var(--border);
}

.feature-detail p {
    color: var(--text-muted);
}

.feature-icon {
    position: absolute;
    top: 40px;
    right: 40px;
    width: 48px;
    height: 48px;
    color: var(--text-muted);
    transition: all 0.4s var(--transition-smooth);
}

/* ===== 故事 ===== */
.stories {
    background-color: var(--bg-secondary);
}

.stories-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 32px;
}

.story-card {
    background-color: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 24px;
    padding: 40px;
    transition: all 0.5s var(--transition-smooth);
    position: relative;
    overflow: hidden;
}

.story-card:hover {
    border-color: var(--border-hover);
    transform: translateY(-4px);
}

.story-card::before {
    content: '"';
    position: absolute;
    top: 20px;
    left: 30px;
    font-size: 6rem;
    line-height: 1;
    color: rgba(0, 255, 157, 0.08);
    font-family: Georgia, serif;
    pointer-events: none;
}

.story-quote {
    font-size: 1.1rem;
    line-height: 1.8;
    color: var(--text-primary);
    margin-bottom: 32px;
    position: relative;
    z-index: 1;
    font-style: italic;
}

.story-author {
    display: flex;
    align-items: center;
    gap: 16px;
}

.story-avatar {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--accent), #00cc7a);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    color: var(--bg-primary);
    font-size: 1.1rem;
    flex-shrink: 0;
}

.story-info {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.story-name {
    font-weight: 600;
    font-size: 0.95rem;
}

.story-role {
    font-size: 0.85rem;
    color: var(--text-muted);
}

/* ===== 互动体验区 ===== */
.playground {
    background-color: var(--bg-primary);
}

.playground-device {
    display: flex;
    justify-content: center;
    padding: 40px 0;
}

.device-frame {
    width: 100%;
    max-width: 380px;
    background: linear-gradient(180deg, #1a1a1a 0%, #0d0d0d 100%);
    border-radius: 40px;
    padding: 12px;
    box-shadow: 
        0 0 0 1px rgba(255, 255, 255, 0.1),
        0 25px 50px rgba(0, 0, 0, 0.5);
    position: relative;
}

.device-frame::before {
    content: '';
    position: absolute;
    top: 20px;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 24px;
    background-color: #0a0a0a;
    border-radius: 12px;
    z-index: 10;
}

.device-screen {
    background-color: var(--bg-primary);
    border-radius: 32px;
    overflow: hidden;
    height: 600px;
    display: flex;
    flex-direction: column;
    position: relative;
}

.chat-header {
    padding: 20px 24px 16px;
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 0.9rem;
    font-weight: 600;
    flex-shrink: 0;
    padding-top: 30px;
}

.chat-status {
    width: 8px;
    height: 8px;
    background-color: var(--accent);
    border-radius: 50%;
    animation: statusBlink 2s ease-in-out infinite;
    flex-shrink: 0;
}

@keyframes statusBlink {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.4; }
}

.chat-messages {
    flex: 1;
    overflow-y: auto;
    padding: 20px;
    display: flex;
    flex-direction: column;
    gap: 12px;
    scrollbar-width: none;
    -ms-overflow-style: none;
}

.chat-messages::-webkit-scrollbar {
    display: none;
}

.msg {
    padding: 12px 16px;
    border-radius: 18px;
    font-size: 0.9rem;
    line-height: 1.5;
    max-width: 80%;
    animation: messageIn 0.3s var(--transition-smooth);
}

@keyframes messageIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.msg-agent {
    background-color: var(--bg-card);
    border: 1px solid var(--border);
    color: var(--text-secondary);
    align-self: flex-start;
    border-bottom-left-radius: 4px;
}

.msg-user {
    background-color: var(--accent-dim);
    border: 1px solid rgba(0, 255, 157, 0.2);
    color: var(--text-primary);
    align-self: flex-end;
    border-bottom-right-radius: 4px;
}

.chat-input-area {
    padding: 16px;
    border-top: 1px solid var(--border);
    display: flex;
    gap: 10px;
    flex-shrink: 0;
}

.chat-input {
    flex: 1;
    background-color: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 24px;
    padding: 12px 20px;
    color: var(--text-primary);
    font-size: 0.9rem;
    outline: none;
    transition: border-color 0.3s var(--transition-smooth);
}

.chat-input:focus {
    border-color: var(--accent);
}

.chat-input::placeholder {
    color: var(--text-muted);
}

.chat-send {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background-color: var(--accent);
    border: none;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.3s var(--transition-smooth);
    flex-shrink: 0;
}

.chat-send:hover {
    transform: scale(1.05);
    box-shadow: 0 0 20px rgba(0, 255, 157, 0.3);
}

.chat-send svg {
    width: 18px;
    height: 18px;
    color: var(--bg-primary);
}

/* ===== 硬件展示 ===== */
.hardware {
    background-color: var(--bg-secondary);
}

.hardware-showcase {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 60px;
    margin-bottom: 80px;
}

.hardware-device {
    position: relative;
    width: 200px;
    height: 200px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.device-body {
    width: 160px;
    height: 100px;
    background: linear-gradient(180deg, #1a1a1a 0%, #0d0d0d 100%);
    border-radius: 16px;
    border: 1px solid var(--border);
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
}

.device-led {
    width: 8px;
    height: 8px;
    background-color: var(--accent);
    border-radius: 50%;
    position: absolute;
    top: 12px;
    right: 12px;
    animation: ledPulse 2s ease-in-out infinite;
    box-shadow: 0 0 10px rgba(0, 255, 157, 0.5);
}

@keyframes ledPulse {
    0%, 100% { opacity: 0.6; }
    50% { opacity: 1; }
}

.device-port {
    width: 40px;
    height: 4px;
    background-color: var(--border);
    border-radius: 2px;
    position: absolute;
    bottom: 16px;
}

.device-shadow {
    position: absolute;
    bottom: -20px;
    left: 50%;
    transform: translateX(-50%);
    width: 120px;
    height: 20px;
    background: radial-gradient(ellipse, rgba(0,0,0,0.4) 0%, transparent 70%);
    border-radius: 50%;
}

.hardware-features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 16px;
    width: 100%;
    max-width: 600px;
}

.hw-feature {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 16px 20px;
    background-color: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 12px;
    font-size: 0.9rem;
    color: var(--text-secondary);
    transition: all 0.3s var(--transition-smooth);
}

.hw-feature:hover {
    border-color: var(--accent);
    color: var(--text-primary);
}

.hw-dot {
    width: 8px;
    height: 8px;
    background-color: var(--accent);
    border-radius: 50%;
    flex-shrink: 0;
    animation: dotPulse 2s ease-in-out infinite;
}

@keyframes dotPulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.2); }
}

/* 技术参数 */
.hardware-cta {
    text-align: center;
    margin-top: 80px;
}

.btn-tech {
    background-color: transparent;
    color: var(--text-secondary);
    border: 1px solid var(--border);
    padding: 12px 32px;
    border-radius: 100px;
    font-size: 0.85rem;
    cursor: pointer;
    transition: all 0.3s var(--transition-smooth);
    letter-spacing: 0.05em;
}

.btn-tech:hover {
    border-color: var(--accent);
    color: var(--accent);
}

.tech-specs {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.6s var(--transition-smooth), 
                opacity 0.4s var(--transition-smooth),
                margin 0.4s var(--transition-smooth);
    opacity: 0;
    margin-top: 0;
}

.tech-specs.open {
    max-height: 500px;
    opacity: 1;
    margin-top: 40px;
}

.spec-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 24px;
    max-width: 800px;
    margin: 0 auto;
}

.spec-item {
    padding: 20px;
    background-color: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 16px;
    text-align: center;
    transition: border-color 0.3s var(--transition-smooth);
}

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

.spec-label {
    display: block;
    font-size: 0.75rem;
    color: var(--text-muted);
    letter-spacing: 0.1em;
    text-transform: uppercase;
    margin-bottom: 8px;
}

.spec-value {
    display: block;
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
}

/* ===== CTA Section ===== */
.cta-section {
    background-color: var(--bg-primary);
    text-align: center;
    padding: 160px 0;
    position: relative;
    overflow: hidden;
}

.cta-section::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(0, 255, 157, 0.05) 0%, transparent 70%);
    pointer-events: none;
}

.cta-content {
    position: relative;
    z-index: 1;
}

.cta-title {
    font-size: clamp(2rem, 5vw, 3.5rem);
    font-weight: 800;
    line-height: 1.15;
    letter-spacing: -0.03em;
    margin-bottom: 24px;
}

.cta-desc {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-bottom: 40px;
}

.cta-button {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    background-color: var(--accent);
    color: var(--bg-primary);
    border: none;
    padding: 18px 40px;
    border-radius: 100px;
    font-size: 1.1rem;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.4s var(--transition-smooth);
    letter-spacing: 0.02em;
    position: relative;
    overflow: hidden;
}

.cta-button::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
    transform: translateX(-100%);
    transition: transform 0.6s var(--transition-smooth);
}

.cta-button:hover::before {
    transform: translateX(100%);
}

.cta-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 40px rgba(0, 255, 157, 0.3);
}

.cta-icon {
    width: 20px;
    height: 20px;
    transition: transform 0.3s var(--transition-smooth);
}

.cta-button:hover .cta-icon {
    transform: translateX(4px);
}

/* ===== Footer ===== */
.footer {
    background-color: var(--bg-secondary);
    padding: 80px 0 40px;
    border-top: 1px solid var(--border);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 60px;
    flex-wrap: wrap;
    gap: 40px;
}

.footer-brand {
    max-width: 300px;
}

.footer-logo {
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    margin-bottom: 12px;
    display: block;
}

.footer-desc {
    color: var(--text-muted);
    font-size: 0.9rem;
    line-height: 1.6;
}

.footer-links {
    display: flex;
    gap: 40px;
}

.footer-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    transition: color 0.3s var(--transition-smooth);
}

.footer-link:hover {
    color: var(--accent);
}

.footer-bottom {
    text-align: center;
    padding-top: 40px;
    border-top: 1px solid var(--border);
}

.footer-bottom p {
    color: var(--text-muted);
    font-size: 0.85rem;
}

/* ===== 滚动动画 ===== */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s var(--transition-smooth), 
                transform 0.8s var(--transition-smooth);
}

.reveal.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ===== 响应式 ===== */
@media (max-width: 768px) {
    .nav-links {
        display: none;
    }
    
    section {
        padding: 80px 0;
    }
    
    .features-grid,
    .stories-grid {
        grid-template-columns: 1fr;
    }
    
    .feature-card {
        padding: 30px 24px;
    }
    
    .feature-icon {
        position: static;
        margin-top: 20px;
    }
    
    .footer-content {
        flex-direction: column;
        align-items: center;
        text-align: center;
    }
    
    .footer-links {
        justify-content: center;
    }
    
    .spec-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .cta-section {
        padding: 100px 0;
    }
}

@media (max-width: 480px) {
    .nav-container {
        padding: 0 16px;
    }
    
    .container {
        padding: 0 16px;
    }
    
    .spec-grid {
        grid-template-columns: 1fr;
    }
    
    .hero-chat {
        width: 100%;
    }
    
    .chat-bubble {
        max-width: 100%;
    }
}

/* ===== 核心卖点 ===== */
.core-values {
    background-color: var(--bg-secondary);
    padding: 160px 0;
}

.values-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 32px;
}

.value-card {
    background-color: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 24px;
    padding: 48px 32px;
    text-align: center;
    transition: all 0.5s var(--transition-smooth);
    position: relative;
    overflow: hidden;
}

.value-card:hover {
    border-color: var(--accent);
    transform: translateY(-8px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}

.value-card:hover .value-icon {
    color: var(--accent);
    transform: scale(1.1);
}

.value-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto 24px;
    color: var(--text-muted);
    transition: all 0.4s var(--transition-smooth);
}

.value-title {
    font-size: 1.75rem;
    font-weight: 800;
    margin-bottom: 16px;
    letter-spacing: -0.02em;
    color: var(--text-primary);
}

.value-desc {
    font-size: 1rem;
    color: var(--text-secondary);
    line-height: 1.7;
}

/* ===== 价格页面 ===== */
.pricing-hero {
    padding: 200px 0 80px;
    text-align: center;
    background: linear-gradient(180deg, var(--bg-secondary) 0%, var(--bg-primary) 100%);
}

.pricing-header {
    max-width: 600px;
    margin: 0 auto;
}

.pricing-title {
    font-size: clamp(2.5rem, 6vw, 4rem);
    font-weight: 800;
    line-height: 1.1;
    letter-spacing: -0.03em;
    margin-bottom: 20px;
}

.pricing-subtitle {
    font-size: 1.1rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

.pricing-section {
    padding: 0 0 120px;
    background-color: var(--bg-primary);
}

.pricing-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 24px;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

.pricing-card {
    background-color: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 24px;
    padding: 40px 32px;
    position: relative;
    overflow: hidden;
    transition: all 0.5s var(--transition-smooth);
    display: flex;
    flex-direction: column;
}

.pricing-card:hover {
    border-color: var(--border-hover);
    transform: translateY(-4px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}

.pricing-popular {
    border-color: var(--accent);
    box-shadow: 0 0 30px rgba(0, 255, 157, 0.1);
}

.pricing-premium {
    border-color: rgba(255, 193, 7, 0.3);
    background: linear-gradient(180deg, rgba(255, 193, 7, 0.03) 0%, var(--bg-card) 100%);
}

.pricing-badge {
    display: inline-block;
    font-size: 0.7rem;
    font-weight: 600;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    padding: 4px 12px;
    border-radius: 100px;
    background-color: var(--bg-card);
    color: var(--text-secondary);
    border: 1px solid var(--border);
    margin-bottom: 16px;
}

.pricing-badge-popular {
    background-color: var(--accent-dim);
    color: var(--accent);
    border-color: rgba(0, 255, 157, 0.3);
}

.pricing-badge-premium {
    background-color: rgba(255, 193, 7, 0.1);
    color: #ffc107;
    border-color: rgba(255, 193, 7, 0.3);
}

.pricing-name {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 8px;
    letter-spacing: -0.02em;
}

.pricing-price {
    margin: 20px 0;
    display: flex;
    align-items: flex-start;
    justify-content: center;
    gap: 4px;
}

.price-symbol {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-top: 8px;
}

.price-number {
    font-size: 3.5rem;
    font-weight: 800;
    line-height: 1;
    letter-spacing: -0.03em;
    background: linear-gradient(135deg, var(--text-primary), var(--accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.pricing-desc {
    font-size: 0.9rem;
    color: var(--text-muted);
    margin-bottom: 32px;
}

.pricing-features {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin-bottom: 32px;
}

.pricing-feature {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.5;
}

.pricing-feature svg {
    width: 20px;
    height: 20px;
    color: var(--accent);
    flex-shrink: 0;
}

.pricing-cta {
    margin-top: auto;
    text-align: center;
}

.pricing-btn {
    width: 100%;
    padding: 14px 24px;
    border-radius: 100px;
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s var(--transition-smooth);
    border: 1px solid var(--border);
    background-color: transparent;
    color: var(--text-primary);
    margin-bottom: 12px;
}

.pricing-btn:hover {
    border-color: var(--accent);
    color: var(--accent);
    box-shadow: 0 0 20px rgba(0, 255, 157, 0.1);
}

.pricing-btn-primary {
    background-color: var(--accent);
    color: var(--bg-primary);
    border-color: var(--accent);
}

.pricing-btn-primary:hover {
    background-color: var(--accent);
    color: var(--bg-primary);
    box-shadow: 0 0 30px rgba(0, 255, 157, 0.3);
    transform: translateY(-2px);
}

.pricing-note {
    font-size: 0.8rem;
    color: var(--text-muted);
}

/* 对比表格 */
.compare-section {
    background-color: var(--bg-secondary);
    padding: 120px 0;
}

.compare-table-wrapper {
    overflow-x: auto;
    margin-top: 60px;
}

.compare-table {
    width: 100%;
    border-collapse: collapse;
    min-width: 800px;
}

.compare-table th,
.compare-table td {
    padding: 16px 24px;
    text-align: left;
    border-bottom: 1px solid var(--border);
}

.compare-table th {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    background-color: var(--bg-card);
}

.compare-table th:first-child {
    border-radius: 12px 0 0 0;
}

.compare-table th:last-child {
    border-radius: 0 12px 0 0;
}

.compare-table td {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.compare-table td:first-child {
    font-weight: 600;
    color: var(--text-primary);
}

.compare-highlight {
    background-color: var(--accent-dim);
    color: var(--accent);
    font-weight: 600;
}

.compare-price {
    display: block;
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--accent);
    margin-top: 4px;
}

/* FAQ */
.faq-section {
    background-color: var(--bg-primary);
    padding: 120px 0;
}

.faq-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 32px;
    max-width: 1000px;
    margin: 0 auto;
}

.faq-item {
    padding: 32px;
    background-color: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 16px;
    transition: all 0.3s var(--transition-smooth);
}

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

.faq-question {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 12px;
    color: var(--text-primary);
    line-height: 1.4;
}

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

/* ===== 玩法展示 ===== */
.showcase {
    background-color: var(--bg-primary);
}

.showcase-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 24px;
}

.showcase-card {
    background-color: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 24px;
    padding: 24px;
    transition: all 0.5s var(--transition-smooth);
    cursor: pointer;
    overflow: hidden;
}

.showcase-card:hover {
    border-color: var(--border-hover);
    transform: translateY(-4px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}

.showcase-video-wrapper {
    position: relative;
    width: 100%;
    aspect-ratio: 16 / 9;
    border-radius: 16px;
    overflow: hidden;
    background-color: var(--bg-secondary);
    margin-bottom: 20px;
}

.showcase-video-wrapper video {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.showcase-play-overlay {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0, 0, 0, 0.4);
    transition: opacity 0.3s var(--transition-smooth);
    pointer-events: none;
}

.showcase-play-overlay svg {
    width: 56px;
    height: 56px;
    color: var(--accent);
    filter: drop-shadow(0 4px 12px rgba(0, 0, 0, 0.5));
    transition: transform 0.3s var(--transition-smooth);
}

.showcase-card:hover .showcase-play-overlay {
    background: rgba(0, 0, 0, 0.25);
}

.showcase-card:hover .showcase-play-overlay svg {
    transform: scale(1.1);
}

.showcase-card.playing .showcase-play-overlay {
    opacity: 0;
}

.showcase-title {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 8px;
    letter-spacing: -0.01em;
}

.showcase-desc {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.5;
}

/* ===== AI向善计划页面 ===== */
.page-hero {
    padding: 200px 0 100px;
    text-align: center;
    background: linear-gradient(180deg, var(--bg-secondary) 0%, var(--bg-primary) 100%);
}

.page-hero .section-tag {
    margin-bottom: 24px;
}

.page-hero-title {
    font-size: clamp(2.5rem, 6vw, 4rem);
    font-weight: 800;
    line-height: 1.1;
    letter-spacing: -0.03em;
    margin-bottom: 20px;
}

.page-hero-subtitle {
    font-size: 1.1rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
    line-height: 1.7;
}

.article-section {
    background-color: var(--bg-primary);
    padding: 80px 0 160px;
}

.article-content {
    max-width: 800px;
    margin: 0 auto;
    padding: 0 24px;
}

.article-content h2 {
    font-size: 1.5rem;
    font-weight: 700;
    margin: 64px 0 24px;
    letter-spacing: -0.02em;
    color: var(--text-primary);
}

.article-content h2:first-child {
    margin-top: 0;
}

.article-content p {
    font-size: 1.05rem;
    line-height: 1.8;
    color: var(--text-secondary);
    margin-bottom: 2em;
}

.article-content blockquote {
    border-left: 3px solid var(--accent);
    padding-left: 24px;
    margin: 40px 0;
    background: var(--accent-dim);
    padding: 24px 24px 24px 32px;
    border-radius: 0 16px 16px 0;
}

.article-content blockquote p {
    font-size: 1.1rem;
    color: var(--text-primary);
    margin-bottom: 0;
    font-style: italic;
}

.article-content .article-image {
    width: 100%;
    border-radius: 16px;
    margin: 40px 0;
    border: 1px solid var(--border);
    display: block;
}

.article-content .article-image-caption {
    text-align: center;
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-top: -32px;
    margin-bottom: 40px;
}

/* 导航链接激活状态 */
.nav-link.active {
    color: var(--accent);
}

.nav-link.active::after {
    width: 100%;
}

/* ===== 玩法展示视频弹窗 ===== */
.showcase-modal {
    position: fixed;
    inset: 0;
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 24px;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.4s var(--transition-smooth);
}

.showcase-modal.open {
    opacity: 1;
    pointer-events: auto;
}

.showcase-modal-backdrop {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.85);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    cursor: pointer;
}

.showcase-modal-content {
    position: relative;
    width: 100%;
    max-width: 900px;
    background-color: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 24px;
    overflow: hidden;
    transform: scale(0.9) translateY(30px);
    transition: transform 0.5s var(--transition-smooth);
    box-shadow: 0 40px 80px rgba(0, 0, 0, 0.5);
}

.showcase-modal.open .showcase-modal-content {
    transform: scale(1) translateY(0);
}

.showcase-modal-close {
    position: absolute;
    top: 16px;
    right: 16px;
    z-index: 10;
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: rgba(0, 0, 0, 0.5);
    border: 1px solid var(--border);
    color: var(--text-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.3s var(--transition-smooth);
    backdrop-filter: blur(8px);
}

.showcase-modal-close:hover {
    background: var(--accent);
    border-color: var(--accent);
    color: var(--bg-primary);
    transform: rotate(90deg);
}

.showcase-modal-close svg {
    width: 20px;
    height: 20px;
}

.showcase-modal-video-wrapper {
    width: 100%;
    aspect-ratio: 16 / 9;
    background: var(--bg-secondary);
    position: relative;
}

.showcase-modal-video-wrapper video {
    width: 100%;
    height: 100%;
    object-fit: contain;
    display: block;
    background: #000;
}

.showcase-modal-info {
    padding: 32px;
}

.showcase-modal-title {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 8px;
    letter-spacing: -0.02em;
}

.showcase-modal-desc {
    font-size: 1rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

@media (max-width: 768px) {
    .showcase-modal {
        padding: 0;
    }

    .showcase-modal-content {
        border-radius: 0;
        max-height: 100vh;
        display: flex;
        flex-direction: column;
    }

    .showcase-modal-video-wrapper {
        flex-shrink: 0;
    }

    .showcase-modal-info {
        padding: 24px;
        overflow-y: auto;
    }
}