/* ai-kefu 页面专属样式（Hero 对话演示 / 技术卡片 / 架构等） */
/* Banner：与全站产品页同色调背景 */
.hero {
    min-height: auto;
    display: flex;
    align-items: center;
    position: relative;
    background: linear-gradient(180deg, #F7F9FC 0%, #FFFFFF 100%);
    overflow: hidden;
    padding: 140px 0 80px;
}

.hero-bg-grid {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: 
        linear-gradient(rgba(22, 93, 255, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(22, 93, 255, 0.03) 1px, transparent 1px);
    background-size: 50px 50px;
    mask-image: radial-gradient(ellipse at center, black 30%, transparent 70%);
    -webkit-mask-image: radial-gradient(ellipse at center, black 30%, transparent 70%);
}

.hero::before {
    content: '';
    position: absolute;
    top: -200px;
    right: -200px;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(22, 93, 255, 0.1) 0%, transparent 70%);
    border-radius: 50%;
}

.hero::after {
    content: '';
    position: absolute;
    bottom: -100px;
    left: -100px;
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(114, 46, 209, 0.08) 0%, transparent 70%);
    border-radius: 50%;
}

.hero-container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 60px 32px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
    position: relative;
    z-index: 1;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 20px;
    background: rgba(22, 93, 255, 0.1);
    border: none;
    color: var(--primary);
    border-radius: 100px;
    font-size: 14px;
    font-weight: 500;
    margin-bottom: 24px;
}

.hero-badge::before { display: none; }

.hero-title {
    font-size: clamp(32px, 4.2vw, 48px);
    font-weight: 700;
    line-height: 1.25;
    margin-bottom: 24px;
    color: var(--dark);
    letter-spacing: -0.3px;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.hero-title-main {
    display: block;
    white-space: nowrap;
}

.hero-title-sub {
    display: block;
    font-size: 0.58em;
    font-weight: 600;
    color: var(--gray-1);
    letter-spacing: 0;
    line-height: 1.4;
    white-space: nowrap;
}

.hero-title .gradient-text {
    background: var(--gradient-1);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 18px;
    color: var(--text-secondary);
    margin-bottom: 20px;
    line-height: 1.8;
}

.hero-channels {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-bottom: 32px;
}

.hero-channel {
    display: inline-flex;
    align-items: center;
    padding: 6px 14px;
    border-radius: 100px;
    background: rgba(22, 93, 255, 0.06);
    border: 1px solid rgba(22, 93, 255, 0.16);
    color: var(--primary);
    font-size: 13px;
    font-weight: 500;
    letter-spacing: 0.2px;
}

.hero-stats {
    display: flex;
    gap: 40px;
    margin-bottom: 40px;
}

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

.stat-number {
    font-size: 36px;
    font-weight: 700;
    background: var(--gradient-1);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1.2;
}

.stat-label {
    font-size: 14px;
    color: var(--text-tertiary);
    margin-top: 4px;
}

.hero-buttons {
    display: flex;
    gap: 16px;
}

.hero-visual {
    position: relative;
}

.chat-demo {
    background: var(--white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    padding: 0;
    position: relative;
    overflow: hidden;
    border: 1px solid rgba(22, 93, 255, 0.08);
    animation: chatFloat 5.5s ease-in-out infinite;
    transition: box-shadow 0.35s ease, transform 0.35s ease;
}
.chat-demo:hover {
    animation-play-state: paused;
    box-shadow: 0 20px 50px rgba(22, 93, 255, 0.18);
    transform: translateY(-4px);
}
@keyframes chatFloat {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

.chat-demo-header {
    background: linear-gradient(135deg, #F8FAFF 0%, #F0F5FF 100%);
    padding: 16px 20px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

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

.chat-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
}

.chat-dot.red { background: #FF5F57; }
.chat-dot.yellow { background: #FEBC2E; }
.chat-dot.green { background: #28C840; }

.chat-title-bar {
    font-size: 13px;
    color: var(--text-tertiary);
    font-weight: 500;
}
.chat-title-spacer {
    width: 48px;
    flex-shrink: 0;
}

.chat-header {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 20px;
    border-bottom: 1px solid var(--border-color);
}

.chat-avatar {
    width: 44px;
    height: 44px;
    background: var(--gradient-1);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 20px;
    position: relative;
}
.chat-avatar svg { width: 22px; height: 22px; stroke: #fff; }

.chat-status {
    width: 10px;
    height: 10px;
    background: var(--accent-green);
    border-radius: 50%;
    border: 2px solid white;
    position: absolute;
    right: -1px;
    bottom: -1px;
    box-shadow: none;
}

.chat-info {
    flex: 1;
}

.chat-name {
    font-weight: 600;
    font-size: 15px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.ai-badge {
    font-size: 10px;
    padding: 2px 6px;
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--accent-purple) 100%);
    color: white;
    border-radius: 4px;
    font-weight: 500;
}

.chat-desc {
    font-size: 13px;
    color: var(--text-tertiary);
    display: flex;
    align-items: center;
    gap: 6px;
    margin-top: 2px;
}

.chat-media-bar {
    display: flex;
    gap: 8px;
    padding: 10px 20px;
    background: #F8FAFF;
    border-bottom: 1px solid var(--border-color);
}

.chat-media-bar span {
    padding: 4px 10px;
    border-radius: 100px;
    font-size: 12px;
    color: var(--text-tertiary);
    background: var(--white);
    border: 1px solid var(--border-color);
}

.chat-media-bar span.is-on {
    color: var(--primary);
    border-color: rgba(22, 93, 255, 0.28);
    background: rgba(22, 93, 255, 0.08);
    font-weight: 600;
}

.chat-messages {
    padding: 20px;
    display: flex;
    flex-direction: column;
    gap: 16px;
    max-height: 380px;
    overflow-y: auto;
}

.message {
    max-width: 85%;
    padding: 12px 16px;
    border-radius: 12px;
    font-size: 14px;
    line-height: 1.7;
}

.message-bot {
    background: var(--bg-gray);
    color: var(--text-primary);
    align-self: flex-start;
    border-bottom-left-radius: 4px;
}

.message-user {
    background: linear-gradient(135deg, var(--primary-blue) 0%, #4080FF 100%);
    color: white;
    align-self: flex-end;
    border-bottom-right-radius: 4px;
}

.message-ai {
    background: linear-gradient(135deg, rgba(22, 93, 255, 0.08) 0%, rgba(114, 46, 209, 0.08) 100%);
    border: 1px solid rgba(22, 93, 255, 0.15);
    align-self: flex-start;
    border-bottom-left-radius: 4px;
}

.message-actions {
    display: flex;
    gap: 8px;
    margin-top: 10px;
    padding-top: 10px;
    border-top: 1px solid rgba(22, 93, 255, 0.1);
}

.message-action-btn {
    padding: 4px 10px;
    background: white;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    font-size: 12px;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.2s;
}

.message-action-btn:hover {
    border-color: var(--primary-blue);
    color: var(--primary-blue);
}

.typing-indicator {
    display: flex;
    gap: 4px;
    padding: 14px 18px;
    background: var(--bg-gray);
    border-radius: 12px;
    border-bottom-left-radius: 4px;
    align-self: flex-start;
    width: fit-content;
}

.typing-indicator span {
    width: 8px;
    height: 8px;
    background: var(--text-tertiary);
    border-radius: 50%;
    animation: typing 1.4s infinite;
}

.typing-indicator span:nth-child(2) { animation-delay: 0.2s; }
.typing-indicator span:nth-child(3) { animation-delay: 0.4s; }

.thinking-tag {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 12px;
    color: var(--primary-blue);
    margin-bottom: 8px;
}

.thinking-icon {
    width: 16px;
    height: 16px;
    border: 2px solid var(--primary-blue);
    border-top-color: transparent;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* 通用区块样式 */
/* 核心技术 */
.core-tech {
    background: #F7F9FC;
    position: relative;
}

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

.tech-card {
    background: var(--white);
    padding: 36px;
    border-radius: var(--radius-lg);
    border: 1px solid transparent;
    box-shadow: var(--shadow-sm);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.tech-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-blue), var(--accent-purple));
    transform: scaleX(0);
    transition: transform 0.4s ease;
}

.tech-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: rgba(22,93,255,0.2);
}

.tech-card:hover::before {
    transform: scaleX(1);
}

.tech-icon {
    width: 72px;
    height: 72px;
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 24px;
    transition: all 0.4s ease;
    position: relative;
}

.tech-icon svg {
    width: 36px;
    height: 36px;
    position: relative;
    z-index: 1;
    transition: all 0.3s ease;
}

.tech-icon.blue {
    background: linear-gradient(135deg, #E8F3FF 0%, #D4E8FF 100%);
}
.tech-icon.blue svg { color: var(--primary-blue); }

.tech-icon.purple {
    background: linear-gradient(135deg, #F5E8FF 0%, #E9D5FF 100%);
}
.tech-icon.purple svg { color: var(--accent-purple); }

.tech-icon.cyan {
    background: linear-gradient(135deg, #E0F7FA 0%, #B2EBF2 100%);
}
.tech-icon.cyan svg { color: var(--accent-cyan); }

.tech-icon.orange {
    background: linear-gradient(135deg, #FFF3E0 0%, #FFE0B2 100%);
}
.tech-icon.orange svg { color: var(--accent-orange); }

.tech-card:hover .tech-icon {
    transform: scale(1.08) rotate(-3deg);
    box-shadow: 0 12px 32px rgba(22, 93, 255, 0.25);
}

.tech-card:hover .tech-icon svg {
    color: white;
}

.tech-card:hover .tech-icon.blue {
    background: linear-gradient(135deg, var(--primary-blue) 0%, #4080FF 100%);
}
.tech-card:hover .tech-icon.purple {
    background: linear-gradient(135deg, var(--accent-purple) 0%, #9254DE 100%);
}
.tech-card:hover .tech-icon.cyan {
    background: linear-gradient(135deg, var(--accent-cyan) 0%, #36CFC9 100%);
}
.tech-card:hover .tech-icon.orange {
    background: linear-gradient(135deg, var(--accent-orange) 0%, #FFA940 100%);
}

.tech-card h3 {
    font-size: 19px;
    font-weight: 700;
    margin-bottom: 12px;
}

.tech-card p {
    color: var(--text-secondary);
    font-size: 14px;
    line-height: 1.8;
}

.tech-tag {
    display: inline-block;
    margin-top: 16px;
    padding: 5px 12px;
    background: var(--bg-gray);
    border-radius: 6px;
    font-size: 12px;
    color: var(--text-tertiary);
}

/* AI能力矩阵 */
.ai-capabilities {
    background: var(--white);
}

.capabilities-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.capabilities-content h2,
.capabilities-content .cap-title {
    font-size: clamp(26px, 3vw, 36px);
    font-weight: 700;
    margin-bottom: 20px;
    line-height: 1.35;
    color: var(--dark);
}
.capabilities-content .cap-title span {
    background: var(--gradient-1);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.capabilities-content > p {
    color: var(--text-secondary);
    font-size: 16px;
    line-height: 1.8;
    margin-bottom: 32px;
}

.capability-list {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.capability-item {
    display: flex;
    gap: 16px;
    padding: 24px;
    background: white;
    border-radius: 16px;
    border: 1px solid var(--border-color);
    transition: all 0.3s ease;
}

.capability-item:hover {
    border-color: var(--primary-blue);
    box-shadow: var(--shadow-md);
    transform: translateX(8px);
}

.capability-num {
    width: 44px;
    height: 44px;
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--accent-purple) 100%);
    color: white;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 18px;
    flex-shrink: 0;
    box-shadow: 0 4px 12px rgba(22, 93, 255, 0.25);
}

.capability-text h4 {
    font-size: 17px;
    font-weight: 600;
    margin-bottom: 6px;
}

.capability-text p {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.7;
}

.capabilities-visual {
    position: relative;
}

.neural-network {
    width: 100%;
    height: 420px;
    background: linear-gradient(135deg, #F8FAFF 0%, #F0F5FF 100%);
    border-radius: 24px;
    position: relative;
    overflow: hidden;
    border: 1px solid rgba(22, 93, 255, 0.1);
    box-shadow: 0 20px 60px rgba(22, 93, 255, 0.1);
}

.neural-node {
    position: absolute;
    width: 12px;
    height: 12px;
    background: var(--gradient-1);
    border-radius: 50%;
    box-shadow: none;
    animation: pulse-node 2s infinite;
}

@keyframes pulse-node {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.6; transform: scale(1.3); }
}

.neural-line {
    position: absolute;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--primary-blue), transparent);
    transform-origin: left center;
    opacity: 0.3;
}

/* 产品价值：文字 / 语音 / 视频 */
.value-section {
    background: #F7F9FC;
}

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

.value-card {
    background: var(--white);
    border-radius: var(--radius-lg);
    padding: 36px 32px;
    border: 1px solid var(--gray-4);
    box-shadow: var(--shadow-sm);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.value-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.4s ease;
}

.value-card:nth-child(1)::before {
    background: linear-gradient(90deg, var(--primary-blue), var(--accent-cyan));
}
.value-card:nth-child(2)::before {
    background: linear-gradient(90deg, var(--accent-purple), var(--primary-blue));
}
.value-card:nth-child(3)::before {
    background: linear-gradient(90deg, var(--accent-cyan), var(--accent-green));
}

.value-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 60px rgba(22, 93, 255, 0.15);
    border-color: transparent;
}

.value-card:hover::before {
    transform: scaleX(1);
}

.value-icon {
    width: 64px;
    height: 64px;
    border-radius: 18px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 22px;
}

.value-icon svg {
    width: 30px;
    height: 30px;
}

.value-icon.v1 {
    background: linear-gradient(135deg, #E8F3FF 0%, #D4E8FF 100%);
}
.value-icon.v1 svg { color: var(--primary-blue); }
.value-icon.v2 {
    background: linear-gradient(135deg, #F5E8FF 0%, #E9D5FF 100%);
}
.value-icon.v2 svg { color: var(--accent-purple); }
.value-icon.v3 {
    background: linear-gradient(135deg, #E0F7FA 0%, #B2EBF2 100%);
}
.value-icon.v3 svg { color: var(--accent-cyan); }

.value-card h3 {
    font-size: 22px;
    font-weight: 700;
    margin-bottom: 12px;
    color: var(--dark);
}

.value-card > p {
    font-size: 15px;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 20px;
}

.value-card ul {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.value-card li {
    font-size: 14px;
    color: var(--text-secondary);
    padding-left: 18px;
    position: relative;
    line-height: 1.6;
}

.value-card li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 8px;
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary-blue), var(--accent-purple));
}

/* 数据指标 */
.metrics {
    background: var(--gradient-1);
    color: white;
    padding: 80px 0;
    position: relative;
    overflow: hidden;
}

.metrics::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: 
        radial-gradient(circle at 20% 50%, rgba(255,255,255,0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 50%, rgba(255,255,255,0.08) 0%, transparent 50%);
}

.metrics-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 40px;
    text-align: center;
    position: relative;
    z-index: 1;
}

.metric-item {
    position: relative;
}

.metric-item:not(:last-child)::after {
    content: '';
    position: absolute;
    right: -20px;
    top: 50%;
    transform: translateY(-50%);
    width: 1px;
    height: 60%;
    background: rgba(255, 255, 255, 0.2);
}

.metric-number {
    font-size: 48px;
    font-weight: 700;
    line-height: 1;
    margin-bottom: 12px;
}

.metric-unit {
    font-size: 26px;
    font-weight: 600;
}

.metric-label {
    font-size: 17px;
    opacity: 0.95;
    font-weight: 500;
}

.metric-desc {
    font-size: 13px;
    opacity: 0.7;
    margin-top: 8px;
}

/* 产品功能 */
.features {
    background: #F7F9FC;
    position: relative;
}

.features::before { display: none; }

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

.feature-card {
    background: var(--white);
    padding: 0;
    border-radius: var(--radius-lg);
    transition: all 0.3s ease;
    border: 1px solid var(--gray-4);
    box-shadow: var(--shadow-sm);
    position: relative;
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.4s ease;
}

.feature-card:nth-child(3n+1)::before {
    background: linear-gradient(90deg, var(--primary-blue), var(--accent-cyan));
}
.feature-card:nth-child(3n+2)::before {
    background: linear-gradient(90deg, var(--accent-purple), var(--primary-blue));
}
.feature-card:nth-child(3n+3)::before {
    background: linear-gradient(90deg, var(--accent-cyan), var(--accent-green));
}

.feature-card::after {
    content: '';
    position: absolute;
    top: -50%;
    right: -50%;
    width: 200px;
    height: 200px;
    background: radial-gradient(circle, rgba(22, 93, 255, 0.05) 0%, transparent 70%);
    border-radius: 50%;
    opacity: 0;
    transition: opacity 0.4s ease;
}

.feature-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 60px rgba(22, 93, 255, 0.15);
    border-color: transparent;
}

.feature-card:hover::before {
    transform: scaleX(1);
}

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

.feature-card-inner {
    padding: 36px;
}

.feature-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    margin-bottom: 20px;
}

.feature-number {
    font-size: 52px;
    font-weight: 800;
    background: linear-gradient(135deg, rgba(22, 93, 255, 0.08) 0%, rgba(114, 46, 209, 0.08) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1;
    font-family: 'SF Mono', Monaco, monospace;
}

.feature-badge {
    padding: 5px 12px;
    border-radius: 8px;
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.5px;
}

.feature-badge.core {
    background: linear-gradient(135deg, rgba(22, 93, 255, 0.1) 0%, rgba(0, 180, 216, 0.1) 100%);
    color: var(--primary-blue);
}

.feature-badge.ai {
    background: linear-gradient(135deg, rgba(114, 46, 209, 0.1) 0%, rgba(0, 180, 216, 0.1) 100%);
    color: var(--accent-purple);
}

.feature-icon {
    width: 72px;
    height: 72px;
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 24px;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
}

.feature-icon svg {
    width: 36px;
    height: 36px;
    position: relative;
    z-index: 1;
    transition: all 0.3s ease;
}

.feature-icon.f1 { background: linear-gradient(135deg, #E8F3FF 0%, #D4E8FF 100%); }
.feature-icon.f1 svg { color: var(--primary-blue); }
.feature-icon.f2 { background: linear-gradient(135deg, #E0F7FA 0%, #B2EBF2 100%); }
.feature-icon.f2 svg { color: var(--accent-cyan); }
.feature-icon.f3 { background: linear-gradient(135deg, #F5E8FF 0%, #E9D5FF 100%); }
.feature-icon.f3 svg { color: var(--accent-purple); }
.feature-icon.f4 { background: linear-gradient(135deg, #E8F5E9 0%, #C8E6C9 100%); }
.feature-icon.f4 svg { color: var(--accent-green); }
.feature-icon.f5 { background: linear-gradient(135deg, #FFF3E0 0%, #FFE0B2 100%); }
.feature-icon.f5 svg { color: var(--accent-orange); }
.feature-icon.f6 { background: linear-gradient(135deg, #FCE4EC 0%, #F8BBD0 100%); }
.feature-icon.f6 svg { color: #EB2F96; }
.feature-icon.f7 { background: linear-gradient(135deg, #E3F2FD 0%, #BBDEFB 100%); }
.feature-icon.f7 svg { color: #2F54EB; }
.feature-icon.f8 { background: linear-gradient(135deg, #F3E5F5 0%, #E1BEE7 100%); }
.feature-icon.f8 svg { color: #9254DE; }
.feature-icon.f9 { background: linear-gradient(135deg, #FFF8E1 0%, #FFECB3 100%); }
.feature-icon.f9 svg { color: #D48806; }

.feature-card:hover .feature-icon {
    transform: scale(1.08) rotate(-5deg);
    box-shadow: 0 12px 32px rgba(22, 93, 255, 0.25);
}

.feature-card:hover .feature-icon svg {
    color: white;
}

.feature-card:hover .feature-icon.f1 { background: linear-gradient(135deg, var(--primary-blue) 0%, #4080FF 100%); }
.feature-card:hover .feature-icon.f2 { background: linear-gradient(135deg, var(--accent-cyan) 0%, #36CFC9 100%); }
.feature-card:hover .feature-icon.f3 { background: linear-gradient(135deg, var(--accent-purple) 0%, #9254DE 100%); }
.feature-card:hover .feature-icon.f4 { background: linear-gradient(135deg, var(--accent-green) 0%, #52C41A 100%); }
.feature-card:hover .feature-icon.f5 { background: linear-gradient(135deg, var(--accent-orange) 0%, #FFA940 100%); }
.feature-card:hover .feature-icon.f6 { background: linear-gradient(135deg, #EB2F96 0%, #F759AB 100%); }
.feature-card:hover .feature-icon.f7 { background: linear-gradient(135deg, #2F54EB 0%, #597EF7 100%); }
.feature-card:hover .feature-icon.f8 { background: linear-gradient(135deg, #9254DE 0%, #B37FEB 100%); }
.feature-card:hover .feature-icon.f9 { background: linear-gradient(135deg, #D48806 0%, #FFC53D 100%); }

.feature-card h3 {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 12px;
    color: var(--text-primary);
}

.feature-card p {
    color: var(--text-secondary);
    font-size: 14px;
    line-height: 1.8;
    margin-bottom: 20px;
}

.feature-divider {
    height: 1px;
    background: linear-gradient(90deg, var(--border-color), transparent);
    margin-bottom: 20px;
}

.feature-list {
    list-style: none;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
}

.feature-list li {
    font-size: 13px;
    color: var(--text-secondary);
    padding: 8px 12px;
    background: var(--bg-gray);
    border-radius: 8px;
    display: flex;
    align-items: center;
    gap: 8px;
    transition: all 0.2s ease;
}

.feature-list li:hover {
    background: var(--primary-blue-light);
    color: var(--primary-blue);
}

.feature-list li::before {
    content: '';
    width: 6px;
    height: 6px;
    background: linear-gradient(135deg, var(--primary-blue), var(--accent-purple));
    border-radius: 50%;
    flex-shrink: 0;
}

/* 技术架构（浅色，与全站产品页一致） */
.architecture {
    background: var(--white);
    color: var(--dark);
    position: relative;
    overflow: hidden;
}

.architecture::before { display: none; }

.architecture .section-tag {
    background: rgba(22, 93, 255, 0.1);
    color: var(--primary);
}

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

.architecture .section-desc {
    color: var(--gray-1);
}

.arch-container {
    position: relative;
    z-index: 1;
}

.arch-layers {
    max-width: 900px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.arch-layer {
    background: linear-gradient(135deg, rgba(22, 93, 255, 0.05) 0%, rgba(114, 46, 209, 0.05) 100%);
    border-radius: var(--radius-md);
    padding: 28px 32px;
    border: 1px solid rgba(22, 93, 255, 0.15);
    transition: all 0.3s ease;
    box-shadow: var(--shadow-sm);
}

.arch-layer:hover {
    border-color: rgba(22, 93, 255, 0.3);
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

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

.arch-layer-num {
    width: 44px;
    height: 44px;
    background: var(--gradient-1);
    color: white;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 18px;
    box-shadow: none;
}

.arch-layer h3 {
    font-size: 20px;
    font-weight: 600;
    color: var(--dark);
}

.arch-layer p {
    color: var(--gray-1);
    font-size: 14px;
    margin-bottom: 14px;
    padding-left: 60px;
}

.arch-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    padding-left: 60px;
}

.arch-tag {
    padding: 6px 14px;
    background: rgba(22, 93, 255, 0.06);
    border-radius: var(--radius-sm);
    font-size: 13px;
    color: var(--dark);
    border: 1px solid rgba(22, 93, 255, 0.15);
    transition: all 0.2s;
}

.arch-tag:hover {
    background: rgba(22, 93, 255, 0.12);
    border-color: rgba(22, 93, 255, 0.35);
    color: var(--primary);
}

.arch-arrow {
    text-align: center;
    color: rgba(22, 93, 255, 0.5);
    font-size: 24px;
    padding: 4px 0;
}

/* 应用场景 */
.scenarios {
    background: #F7F9FC;
}

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

.scenario-card {
    background: var(--white);
    border-radius: var(--radius-lg);
    padding: 40px 32px;
    text-align: center;
    transition: all 0.3s ease;
    cursor: default;
    border: 1px solid var(--gray-4);
    box-shadow: var(--shadow-sm);
}

.scenario-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: rgba(22,93,255,0.2);
}

.scenario-icon {
    width: 64px;
    height: 64px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    font-size: 28px;
    transition: all 0.3s ease;
}

.scenario-icon.s1 { background: linear-gradient(135deg, #E8F3FF 0%, #D4E8FF 100%); }
.scenario-icon.s2 { background: linear-gradient(135deg, #FFF3E0 0%, #FFE0B2 100%); }
.scenario-icon.s3 { background: linear-gradient(135deg, #E8F5E9 0%, #C8E6C9 100%); }
.scenario-icon.s4 { background: linear-gradient(135deg, #F3E5F5 0%, #E1BEE7 100%); }
.scenario-icon.s5 { background: linear-gradient(135deg, #E0F7FA 0%, #B2EBF2 100%); }
.scenario-icon.s6 { background: linear-gradient(135deg, #FCE4EC 0%, #F8BBD0 100%); }

.scenario-card:hover .scenario-icon {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.scenario-card h3 {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 12px;
}

.scenario-card p {
    color: var(--text-secondary);
    font-size: 14px;
    line-height: 1.8;
}

/* 客户案例 */
.cases {
    background: var(--white);
}

.cases-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 28px;
}

.case-card {
    background: white;
    border-radius: 20px;
    padding: 36px;
    border: 1px solid var(--border-color);
    transition: all 0.3s ease;
}

.case-card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-4px);
}

.case-header {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 24px;
    padding-bottom: 24px;
    border-bottom: 1px solid var(--border-color);
}

.case-logo {
    width: 56px;
    height: 56px;
    background: linear-gradient(135deg, rgba(22,93,255,0.1) 0%, rgba(114,46,209,0.1) 100%);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
    flex-shrink: 0;
}

.case-info h4 {
    font-size: 19px;
    font-weight: 700;
}

.case-info span {
    font-size: 13px;
    color: var(--text-tertiary);
}

.case-results {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
    margin-bottom: 24px;
}

.case-result {
    text-align: center;
    padding: 20px 12px;
    background: linear-gradient(135deg, #F8FAFF 0%, #F0F5FF 100%);
    border-radius: 12px;
}

.case-result-num {
    font-size: 28px;
    font-weight: 800;
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--accent-purple) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.case-result-label {
    font-size: 12px;
    color: var(--text-tertiary);
    margin-top: 6px;
}

.case-desc {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.8;
}

/* 动画 */
@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(30px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes fadeInRight {
    from { opacity: 0; transform: translateX(30px); }
    to { opacity: 1; transform: translateX(0); }
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

@keyframes typing {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-5px); }
}

/* 响应式 */
@media (max-width: 1024px) {
    .hero-container {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 40px;
    }

    .hero-buttons, .hero-stats {
        justify-content: center;
    }

    .capabilities-layout {
        grid-template-columns: 1fr;
    }

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

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

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

    .metric-item:not(:last-child)::after {
        display: none;
    }
}

@media (max-width: 768px) {
    .hero { padding: 110px 0 48px; }
    .hero-title { font-size: 32px; gap: 6px; }
    .hero-title-main,
    .hero-title-sub { white-space: normal; }
    .section-title { font-size: 28px; }
    .tech-grid, .features-grid, .scenarios-grid, .metrics-grid, .value-grid {
        grid-template-columns: 1fr;
    }
    .hero-channels { justify-content: center; }
    .hero-buttons { flex-direction: column; }
    .hero-stats { flex-wrap: wrap; gap: 20px; justify-content: center; }
    .cta-box { padding: 40px 24px; }
    .arch-layer p, .arch-tags { padding-left: 0; }
    .feature-list { grid-template-columns: 1fr; }
    .chat-demo { animation: none; }
}

/* ---------- 页面动效增强 ---------- */
@media (prefers-reduced-motion: no-preference) {
    .hero-content > * {
        opacity: 0;
        animation: fadeInUp 0.7s cubic-bezier(0.22, 1, 0.36, 1) forwards;
    }
    .hero-badge { animation-delay: 0.05s; }
    .hero-title { animation-delay: 0.15s; }
    .hero-subtitle { animation-delay: 0.28s; }
    .hero-channels { animation-delay: 0.34s; }
    .hero-stats { animation-delay: 0.4s; }
    .hero-buttons { animation-delay: 0.52s; }

    .hero-visual {
        animation: fadeInRight 0.85s cubic-bezier(0.22, 1, 0.36, 1) 0.25s both;
    }

    .chat-messages .message {
        opacity: 0;
        animation: msgIn 0.55s ease forwards;
    }
    .chat-messages .message:nth-child(1) { animation-delay: 0.7s; }
    .chat-messages .message:nth-child(2) { animation-delay: 1.15s; }
    .chat-messages .message:nth-child(3) { animation-delay: 1.7s; }
    .chat-messages .message:nth-child(4) { animation-delay: 2.2s; }
    .chat-messages .typing-indicator {
        opacity: 0;
        animation: msgIn 0.4s ease 2.6s forwards;
    }

    .fade-in.visible {
        transition-delay: 0s;
    }
    .tech-grid .fade-in.visible:nth-child(1) { transition-delay: 0.05s; }
    .tech-grid .fade-in.visible:nth-child(2) { transition-delay: 0.12s; }
    .tech-grid .fade-in.visible:nth-child(3) { transition-delay: 0.19s; }
    .tech-grid .fade-in.visible:nth-child(4) { transition-delay: 0.26s; }

    .features-grid .fade-in.visible:nth-child(1) { transition-delay: 0.04s; }
    .features-grid .fade-in.visible:nth-child(2) { transition-delay: 0.08s; }
    .features-grid .fade-in.visible:nth-child(3) { transition-delay: 0.12s; }
    .features-grid .fade-in.visible:nth-child(4) { transition-delay: 0.16s; }
    .features-grid .fade-in.visible:nth-child(5) { transition-delay: 0.2s; }
    .features-grid .fade-in.visible:nth-child(6) { transition-delay: 0.24s; }
    .features-grid .fade-in.visible:nth-child(7) { transition-delay: 0.28s; }
    .features-grid .fade-in.visible:nth-child(8) { transition-delay: 0.32s; }
    .features-grid .fade-in.visible:nth-child(9) { transition-delay: 0.36s; }

    .value-grid .fade-in.visible:nth-child(1) { transition-delay: 0.05s; }
    .value-grid .fade-in.visible:nth-child(2) { transition-delay: 0.12s; }
    .value-grid .fade-in.visible:nth-child(3) { transition-delay: 0.19s; }

    .scenarios-grid .fade-in.visible:nth-child(1) { transition-delay: 0.05s; }
    .scenarios-grid .fade-in.visible:nth-child(2) { transition-delay: 0.1s; }
    .scenarios-grid .fade-in.visible:nth-child(3) { transition-delay: 0.15s; }
    .scenarios-grid .fade-in.visible:nth-child(4) { transition-delay: 0.2s; }
    .scenarios-grid .fade-in.visible:nth-child(5) { transition-delay: 0.25s; }
    .scenarios-grid .fade-in.visible:nth-child(6) { transition-delay: 0.3s; }

    .arch-layer {
        transition: transform 0.35s ease, box-shadow 0.35s ease, border-color 0.35s ease;
    }
    .metric-item.is-counted .metric-number {
        animation: metricPop 0.45s ease;
    }
}

@keyframes msgIn {
    from { opacity: 0; transform: translateY(12px); }
    to { opacity: 1; transform: translateY(0); }
}
@keyframes metricPop {
    0% { transform: scale(0.92); }
    60% { transform: scale(1.06); }
    100% { transform: scale(1); }
}

.section-title {
    text-wrap: balance;
}
.cta-box h2 {
    text-wrap: balance;
}