/* ==================== 变量与重置 ==================== */
:root {
    --primary: #F97316;
    --primary-dark: #EA580C;
    --primary-light: #FFF7ED;
    --primary-soft: #FED7AA;
    --accent: #3B82F6;
    --accent-light: #EFF6FF;
    --secondary: #0F172A;
    --secondary-light: #1E293B;
    --text: #334155;
    --text-light: #64748B;
    --text-lighter: #94A3B8;
    --bg: #FFFFFF;
    --bg-light: #F8FAFC;
    --bg-warm: #FFFBF5;
    --border: #E2E8F0;
    --radius: 16px;
    --radius-lg: 24px;
    --radius-sm: 10px;
    --shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.04), 0 1px 2px -1px rgba(0, 0, 0, 0.04);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
    --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.08), 0 8px 10px -6px rgba(0, 0, 0, 0.04);
    --shadow-xl: 0 25px 50px -12px rgba(0, 0, 0, 0.12);
    --container: 1180px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    color: var(--text);
    line-height: 1.7;
    background: var(--bg);
    overflow-x: hidden;
}

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

ul {
    list-style: none;
}

img {
    max-width: 100%;
    height: auto;
}

.container {
    width: 100%;
    max-width: var(--container);
    margin: 0 auto;
    padding: 0 24px;
}

.section {
    padding: 110px 0;
}

.section-header {
    text-align: center;
    max-width: 720px;
    margin: 0 auto 64px;
}

.section-tag {
    display: inline-block;
    padding: 7px 18px;
    background: var(--primary-light);
    color: var(--primary-dark);
    font-size: 14px;
    font-weight: 600;
    border-radius: 50px;
    margin-bottom: 16px;
}

.section-header h2 {
    font-size: 38px;
    font-weight: 800;
    margin-bottom: 16px;
    color: var(--secondary);
    line-height: 1.25;
    letter-spacing: -0.02em;
}

.section-header p {
    font-size: 18px;
    color: var(--text-light);
}

/* 滚动动画 */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.7s cubic-bezier(0.4, 0, 0.2, 1), transform 0.7s cubic-bezier(0.4, 0, 0.2, 1);
}

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

.delay-1 { transition-delay: 0.1s; }
.delay-2 { transition-delay: 0.2s; }
.delay-3 { transition-delay: 0.3s; }

/* ==================== 按钮 ==================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 28px;
    border-radius: 50px;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    border: 2px solid transparent;
    transition: var(--transition);
    white-space: nowrap;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: #fff;
    box-shadow: 0 4px 14px rgba(249, 115, 22, 0.32);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 28px rgba(249, 115, 22, 0.42);
}

.btn-outline {
    background: transparent;
    color: var(--primary-dark);
    border-color: var(--primary-soft);
}

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

.btn-white {
    background: #fff;
    color: var(--primary-dark);
    box-shadow: var(--shadow-md);
}

.btn-white:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-outline-white {
    background: transparent;
    color: #fff;
    border-color: rgba(255, 255, 255, 0.5);
}

.btn-outline-white:hover {
    background: rgba(255, 255, 255, 0.12);
    border-color: #fff;
    transform: translateY(-2px);
}

.btn-lg {
    padding: 15px 34px;
    font-size: 16px;
}

.btn-block {
    width: 100%;
}

.btn:disabled {
    cursor: not-allowed;
    opacity: 0.65;
    box-shadow: none;
    transform: none;
}

/* ==================== 导航栏 ==================== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid transparent;
    transition: var(--transition);
}

.header.scrolled {
    border-bottom-color: var(--border);
    box-shadow: var(--shadow);
}

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

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 22px;
    font-weight: 800;
    color: var(--secondary);
}

.logo img {
    width: 38px;
    height: 38px;
    object-fit: contain;
}

.nav ul {
    display: flex;
    gap: 34px;
}

.nav a {
    font-size: 15px;
    font-weight: 500;
    color: var(--text);
    position: relative;
}

.nav a::after {
    content: '';
    position: absolute;
    bottom: -6px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary);
    border-radius: 2px;
    transition: var(--transition);
}

.nav a:hover,
.nav a.active {
    color: var(--primary-dark);
}

.nav a:hover::after,
.nav a.active::after {
    width: 100%;
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 16px;
}

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

.mobile-menu-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--secondary);
    transition: var(--transition);
}

.mobile-menu-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.mobile-menu-toggle.active span:nth-child(2) {
    opacity: 0;
}

.mobile-menu-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

/* ==================== Hero ==================== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: 140px 0 100px;
    overflow: hidden;
    background: linear-gradient(180deg, var(--bg-warm) 0%, var(--bg) 60%);
}

.hero-container {
    display: grid;
    grid-template-columns: 1fr 1.15fr;
    gap: 70px;
    align-items: center;
    position: relative;
    z-index: 2;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 18px;
    background: #fff;
    color: var(--primary-dark);
    font-size: 14px;
    font-weight: 600;
    border-radius: 50px;
    box-shadow: var(--shadow-md);
    margin-bottom: 24px;
}

.badge-dot {
    width: 8px;
    height: 8px;
    background: var(--primary);
    border-radius: 50%;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.6; transform: scale(1.2); }
}

.hero-content h1 {
    font-size: 54px;
    font-weight: 800;
    line-height: 1.12;
    color: var(--secondary);
    margin-bottom: 24px;
    letter-spacing: -0.03em;
}

.hero-subtitle {
    font-size: 18px;
    color: var(--text-light);
    margin-bottom: 36px;
    max-width: 520px;
    line-height: 1.8;
}

.hero-buttons {
    display: flex;
    gap: 16px;
    margin-bottom: 40px;
    flex-wrap: wrap;
}

.hero-trust {
    display: flex;
    align-items: center;
    gap: 14px;
}

.trust-avatars {
    display: flex;
}

.trust-avatars img {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    border: 2px solid #fff;
    margin-left: -10px;
    object-fit: contain;
    background: var(--primary-light);
}

.trust-avatars img:first-child {
    margin-left: 0;
}

.hero-trust p {
    font-size: 14px;
    color: var(--text-light);
}

.hero-trust strong {
    color: var(--secondary);
    font-weight: 700;
}

/* Hero 产品界面 */
.hero-visual {
    position: relative;
}

.app-window {
    display: flex;
    background: #fff;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
    overflow: hidden;
    border: 1px solid var(--border);
    height: 520px;
}

.app-sidebar {
    width: 70px;
    background: var(--secondary);
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 18px 0;
    gap: 24px;
}

.app-logo img {
    width: 36px;
    height: 36px;
    border-radius: 10px;
}

.app-nav {
    display: flex;
    flex-direction: column;
    gap: 12px;
    flex: 1;
}

.app-nav-item {
    width: 42px;
    height: 42px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 12px;
    font-size: 18px;
    cursor: pointer;
    transition: var(--transition);
    opacity: 0.6;
}

.app-nav-item:hover,
.app-nav-item.active {
    background: rgba(255, 255, 255, 0.12);
    opacity: 1;
}

.app-user {
    width: 38px;
    height: 38px;
    border-radius: 50%;
    background: var(--primary);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 13px;
    font-weight: 600;
}

.app-main {
    flex: 1;
    display: grid;
    grid-template-columns: 220px 1fr;
}

.app-chat-list {
    background: var(--bg-light);
    border-right: 1px solid var(--border);
    padding: 16px;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.chat-search {
    padding: 10px 14px;
    background: #fff;
    border-radius: var(--radius-sm);
    font-size: 13px;
    color: var(--text-lighter);
    border: 1px solid var(--border);
    margin-bottom: 6px;
}

.chat-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: var(--transition);
}

.chat-item:hover,
.chat-item.active {
    background: #fff;
    box-shadow: var(--shadow);
}

.chat-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--primary-light);
    color: var(--primary-dark);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 11px;
    font-weight: 700;
    flex-shrink: 0;
}

.chat-avatar.ai {
    background: var(--secondary);
    color: #fff;
}

.chat-info {
    min-width: 0;
}

.chat-info strong {
    display: block;
    font-size: 13px;
    color: var(--secondary);
    margin-bottom: 2px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.chat-info span {
    font-size: 12px;
    color: var(--text-lighter);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    display: block;
}

.app-chat-room {
    display: flex;
    flex-direction: column;
    background: #fff;
}

.chat-room-header {
    padding: 16px 20px;
    border-bottom: 1px solid var(--border);
}

.chat-room-header strong {
    display: block;
    font-size: 15px;
    color: var(--secondary);
}

.chat-room-header span {
    font-size: 12px;
    color: var(--primary-dark);
    font-weight: 500;
}

.chat-messages {
    flex: 1;
    padding: 20px;
    display: flex;
    flex-direction: column;
    gap: 16px;
    overflow-y: auto;
}

.msg {
    display: flex;
    gap: 10px;
}

.msg.me {
    justify-content: flex-end;
}

.msg-avatar {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: var(--secondary);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    flex-shrink: 0;
}

.msg-bubble {
    max-width: 280px;
    padding: 12px 16px;
    border-radius: 16px;
    font-size: 13px;
    line-height: 1.6;
}

.msg.me .msg-bubble {
    background: var(--primary);
    color: #fff;
    border-bottom-right-radius: 4px;
}

.msg.ai .msg-bubble {
    background: var(--bg-light);
    color: var(--text);
    border-bottom-left-radius: 4px;
}

.msg-bubble ul {
    margin: 8px 0 0;
    padding-left: 18px;
    list-style: disc;
}

.msg-bubble li {
    margin-bottom: 3px;
}

.msg-action {
    display: flex;
    gap: 8px;
    margin-top: 10px;
}

.msg-action span {
    padding: 4px 10px;
    background: #fff;
    border-radius: 50px;
    font-size: 11px;
    color: var(--primary-dark);
    font-weight: 600;
    border: 1px solid var(--primary-soft);
}

.chat-input {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 14px 18px;
    border-top: 1px solid var(--border);
}

.chat-input span {
    padding: 5px 10px;
    background: var(--primary-light);
    color: var(--primary-dark);
    border-radius: 50px;
    font-size: 12px;
    font-weight: 600;
}

.chat-input input {
    flex: 1;
    border: none;
    outline: none;
    font-size: 13px;
    color: var(--text);
    background: transparent;
}

.chat-input button {
    width: 34px;
    height: 34px;
    border: none;
    border-radius: 50%;
    background: var(--primary);
    color: #fff;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
}

/* 浮动卡片 */
.floating-card {
    position: absolute;
    padding: 12px 20px;
    background: #fff;
    border-radius: 50px;
    box-shadow: var(--shadow-lg);
    font-size: 14px;
    font-weight: 600;
    color: var(--secondary);
    display: flex;
    align-items: center;
    gap: 10px;
    animation: float 5s ease-in-out infinite;
}

.card-1 {
    top: 30px;
    left: -40px;
    animation-delay: 0s;
}

.card-2 {
    bottom: 70px;
    right: -30px;
    flex-direction: column;
    gap: 2px;
    padding: 14px 22px;
    border-radius: var(--radius);
    animation-delay: 1.5s;
}

.card-2 strong {
    font-size: 24px;
    color: var(--primary);
    line-height: 1;
}

.card-2 span {
    font-size: 12px;
    color: var(--text-light);
    font-weight: 500;
}

.pulse {
    width: 10px;
    height: 10px;
    background: #22C55E;
    border-radius: 50%;
    animation: pulse-green 2s infinite;
}

@keyframes pulse-green {
    0%, 100% { box-shadow: 0 0 0 0 rgba(34, 197, 94, 0.4); }
    70% { box-shadow: 0 0 0 8px rgba(34, 197, 94, 0); }
}

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

/* Hero 背景 */
.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 1;
    pointer-events: none;
}

.blob {
    position: absolute;
    border-radius: 50%;
    filter: blur(90px);
    opacity: 0.45;
}

.blob-orange {
    width: 550px;
    height: 550px;
    background: var(--primary-soft);
    top: -180px;
    right: -120px;
}

.blob-blue {
    width: 420px;
    height: 420px;
    background: #BFDBFE;
    bottom: -120px;
    left: -120px;
    opacity: 0.35;
}

/* ==================== 痛点 ==================== */
.painpoints {
    background: var(--bg);
}

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

.pain-card {
    padding: 34px;
    background: var(--bg-light);
    border-radius: var(--radius);
    transition: var(--transition);
    border: 1px solid var(--border);
}

.pain-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
    background: #fff;
    border-color: var(--primary-soft);
}

.pain-icon {
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #fff;
    border-radius: 14px;
    font-size: 28px;
    margin-bottom: 20px;
    box-shadow: var(--shadow);
}

.pain-card h3 {
    font-size: 18px;
    color: var(--secondary);
    margin-bottom: 10px;
}

.pain-card p {
    font-size: 14px;
    color: var(--text-light);
    line-height: 1.7;
}

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

.solution-container {
    display: grid;
    grid-template-columns: 1.1fr 1fr;
    gap: 80px;
    align-items: center;
}

.solution-content h2 {
    font-size: 34px;
    color: var(--secondary);
    margin: 16px 0 22px;
    line-height: 1.3;
    font-weight: 800;
    letter-spacing: -0.02em;
}

.solution-content > p {
    color: var(--text-light);
    font-size: 16px;
    margin-bottom: 36px;
    line-height: 1.8;
}

.solution-flow {
    display: flex;
    align-items: center;
    gap: 16px;
    flex-wrap: wrap;
}

.flow-step {
    display: flex;
    flex-direction: column;
    gap: 6px;
    padding: 18px 22px;
    background: #fff;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    min-width: 140px;
}

.flow-num {
    width: 28px;
    height: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--primary-light);
    color: var(--primary-dark);
    border-radius: 50%;
    font-size: 13px;
    font-weight: 700;
}

.flow-step strong {
    font-size: 15px;
    color: var(--secondary);
}

.flow-step span {
    font-size: 13px;
    color: var(--text-light);
}

.flow-arrow {
    font-size: 22px;
    color: var(--primary);
    font-weight: 700;
}

.solution-visual {
    display: flex;
    justify-content: center;
}

.solution-card {
    background: #fff;
    padding: 40px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    display: flex;
    flex-direction: column;
    gap: 24px;
    max-width: 420px;
    width: 100%;
}

.solution-row {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    flex-wrap: wrap;
}

.solution-tag {
    padding: 10px 18px;
    background: var(--bg-light);
    border-radius: 50px;
    font-size: 14px;
    font-weight: 600;
    color: var(--text);
}

.solution-tag.tag-human {
    background: #E0F2FE;
    color: #0369A1;
}

.solution-tag.tag-ai {
    background: var(--primary-light);
    color: var(--primary-dark);
}

.solution-plus,
.solution-equals {
    font-size: 18px;
    font-weight: 700;
    color: var(--primary);
}

.solution-equals {
    text-align: center;
    padding: 12px;
    background: linear-gradient(135deg, var(--primary-light) 0%, #fff 100%);
    border-radius: var(--radius);
    color: var(--primary-dark);
}

/* ==================== 核心功能 ==================== */
.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
}

.feature-card {
    background: #fff;
    padding: 38px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
    border: 1px solid var(--border);
    transition: var(--transition);
}

.feature-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-soft);
}

.feature-icon {
    width: 60px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--primary-light);
    border-radius: 16px;
    font-size: 28px;
    margin-bottom: 22px;
    transition: var(--transition);
}

.feature-card:hover .feature-icon {
    transform: scale(1.05);
}

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

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

/* ==================== 数字员工演示 ==================== */
.ai-demo {
    background: var(--secondary);
    color: #fff;
}

.ai-demo .section-header h2,
.ai-demo .section-header p {
    color: #fff;
}

.ai-demo .section-tag {
    background: rgba(255, 255, 255, 0.12);
    color: var(--primary-soft);
}

.ai-demo-container {
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.ai-tabs {
    display: flex;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    padding: 8px;
    gap: 8px;
    flex-wrap: wrap;
}

.ai-tab {
    padding: 12px 24px;
    background: transparent;
    border: none;
    color: rgba(255, 255, 255, 0.7);
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    border-radius: var(--radius-sm);
    transition: var(--transition);
    font-family: inherit;
}

.ai-tab:hover {
    color: #fff;
    background: rgba(255, 255, 255, 0.05);
}

.ai-tab.active {
    background: var(--primary);
    color: #fff;
}

.ai-demo-content {
    position: relative;
    min-height: 340px;
}

.ai-demo-panel {
    display: none;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
    padding: 48px;
    align-items: center;
    animation: fadeIn 0.4s ease;
}

.ai-demo-panel.active {
    display: grid;
}

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

.ai-demo-text h3 {
    font-size: 26px;
    margin-bottom: 16px;
    font-weight: 700;
}

.ai-demo-text > p {
    color: rgba(255, 255, 255, 0.75);
    margin-bottom: 24px;
    line-height: 1.8;
}

.ai-demo-text ul {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.ai-demo-text li {
    color: rgba(255, 255, 255, 0.9);
    font-size: 15px;
}

.ai-demo-chat {
    background: rgba(0, 0, 0, 0.2);
    border-radius: var(--radius);
    padding: 28px;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.demo-msg {
    padding: 14px 18px;
    border-radius: 16px;
    font-size: 14px;
    line-height: 1.6;
    max-width: 90%;
    animation: messagePop 0.4s ease;
}

.demo-msg.me {
    background: var(--primary);
    color: #fff;
    align-self: flex-end;
    border-bottom-right-radius: 4px;
}

.demo-msg.ai {
    background: rgba(255, 255, 255, 0.1);
    color: #fff;
    align-self: flex-start;
    border-bottom-left-radius: 4px;
}

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

/* ==================== 场景 ==================== */
.scenarios {
    background: var(--bg-light);
}

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

.scenario-card {
    background: #fff;
    padding: 32px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
    transition: var(--transition);
    border: 1px solid transparent;
}

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

.scenario-card.wide {
    grid-column: span 2;
}

.scenario-head {
    display: flex;
    align-items: center;
    gap: 14px;
    margin-bottom: 16px;
}

.scenario-icon {
    width: 46px;
    height: 46px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--primary-light);
    border-radius: 12px;
    font-size: 22px;
}

.scenario-card h3 {
    font-size: 18px;
    color: var(--secondary);
}

.scenario-card p {
    font-size: 14px;
    color: var(--text-light);
    line-height: 1.7;
}

/* ==================== 差异化 ==================== */
.differentiation {
    background: #fff;
}

.differentiation-container {
    display: grid;
    grid-template-columns: 1.1fr 1fr;
    gap: 80px;
    align-items: center;
}

.differentiation-content h2 {
    font-size: 34px;
    color: var(--secondary);
    margin: 16px 0 22px;
    line-height: 1.3;
    font-weight: 800;
    letter-spacing: -0.02em;
}

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

.diff-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
}

.diff-card {
    display: flex;
    flex-direction: column;
    gap: 6px;
    padding: 22px;
    background: var(--bg-light);
    border-radius: var(--radius);
    border-left: 4px solid var(--primary);
    transition: var(--transition);
}

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

.diff-card strong {
    font-size: 17px;
    color: var(--secondary);
}

.diff-card span {
    font-size: 13px;
    color: var(--text-light);
    line-height: 1.6;
}

.differentiation-visual {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.ai-employee-card {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 18px 22px;
    background: #fff;
    border-radius: var(--radius);
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border);
    transition: var(--transition);
}

.ai-employee-card:hover {
    transform: translateX(8px);
    border-color: var(--primary-soft);
}

.ai-employee-avatar {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--primary-light);
    border-radius: 14px;
    overflow: hidden;
}

.ai-employee-avatar img {
    width: 32px;
    height: 32px;
    object-fit: contain;
}

.ai-employee-info {
    flex: 1;
    display: flex;
    flex-direction: column;
}

.ai-employee-info strong {
    font-size: 15px;
    color: var(--secondary);
}

.ai-employee-info span {
    font-size: 13px;
    color: var(--text-light);
}

.ai-employee-status {
    padding: 5px 12px;
    border-radius: 50px;
    font-size: 12px;
    font-weight: 600;
}

.ai-employee-status.online {
    background: #DCFCE7;
    color: #166534;
}

.ai-employee-status.training {
    background: var(--primary-light);
    color: var(--primary-dark);
}

/* ==================== 安全与可信 ==================== */
.security {
    background: var(--bg-warm);
}

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

.security-card {
    background: #fff;
    padding: 34px;
    border-radius: var(--radius);
    text-align: center;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.security-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-md);
}

.security-icon {
    width: 64px;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-light);
    border-radius: 16px;
    font-size: 30px;
    margin: 0 auto 18px;
}

.security-card h3 {
    font-size: 18px;
    color: var(--secondary);
    margin-bottom: 10px;
}

.security-card p {
    font-size: 14px;
    color: var(--text-light);
    line-height: 1.7;
}

/* ==================== 客户评价 ==================== */
.testimonials {
    background: var(--bg);
}

.testimonial-slider {
    position: relative;
    max-width: 800px;
    margin: 0 auto;
    overflow: hidden;
}

.testimonial-track {
    display: flex;
    transition: transform 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

.testimonial-card {
    min-width: 100%;
    padding: 48px;
    background: var(--bg-light);
    border-radius: var(--radius-lg);
    text-align: center;
    border: 1px solid var(--border);
}

.testimonial-card > p {
    font-size: 22px;
    color: var(--secondary);
    line-height: 1.7;
    margin-bottom: 28px;
    font-weight: 500;
}

.testimonial-author strong {
    display: block;
    font-size: 16px;
    color: var(--secondary);
    margin-bottom: 4px;
}

.testimonial-author span {
    font-size: 14px;
    color: var(--text-light);
}

.testimonial-dots {
    display: flex;
    justify-content: center;
    gap: 10px;
    margin-top: 28px;
}

.testimonial-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--border);
    cursor: pointer;
    transition: var(--transition);
    border: none;
}

.testimonial-dot.active {
    background: var(--primary);
    width: 28px;
    border-radius: 5px;
}

/* ==================== CTA ==================== */
.cta {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    padding: 100px 0;
}

.cta-container {
    text-align: center;
}

.cta-content h2 {
    color: #fff;
    font-size: 38px;
    margin-bottom: 14px;
    font-weight: 800;
}

.cta-content p {
    color: rgba(255, 255, 255, 0.9);
    font-size: 17px;
    margin-bottom: 38px;
}

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

/* ==================== 联系表单 ==================== */
.contact {
    background: var(--bg-light);
}

.contact-form {
    max-width: 760px;
    margin: 0 auto;
    background: #fff;
    padding: 48px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    margin-bottom: 20px;
}

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

.form-group label {
    font-size: 14px;
    font-weight: 600;
    color: var(--secondary);
}

.form-group input,
.form-group select,
.form-group textarea {
    padding: 14px 18px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    font-size: 15px;
    font-family: inherit;
    transition: var(--transition);
    background: var(--bg-light);
    color: var(--text);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary);
    background: #fff;
    box-shadow: 0 0 0 4px rgba(249, 115, 22, 0.1);
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

.form-group select {
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' fill='%2364748b' viewBox='0 0 16 16'%3E%3Cpath d='M7.247 11.14 2.451 5.658C1.885 5.013 2.345 4 3.204 4h9.592a1 1 0 0 1 .753 1.659l-4.796 5.48a1 1 0 0 1-1.506 0z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 16px center;
}

/* ==================== 页脚 ==================== */
.footer {
    background: var(--secondary);
    color: #fff;
    padding: 70px 0 30px;
}

.footer-top {
    display: grid;
    grid-template-columns: 1.5fr 2fr;
    gap: 80px;
    margin-bottom: 50px;
}

.footer-brand .logo {
    color: #fff;
    margin-bottom: 20px;
}

.footer-brand p {
    color: rgba(255, 255, 255, 0.7);
    max-width: 320px;
    line-height: 1.7;
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 40px;
}

.footer-col h4 {
    font-size: 16px;
    margin-bottom: 20px;
    color: #fff;
}

.footer-col li {
    margin-bottom: 12px;
}

.footer-col a {
    color: rgba(255, 255, 255, 0.7);
    font-size: 14px;
}

.footer-col a:hover {
    color: var(--primary-soft);
}

.footer-bottom {
    padding-top: 30px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    text-align: center;
}

.footer-bottom p {
    color: rgba(255, 255, 255, 0.5);
    font-size: 14px;
}

/* ==================== Toast ==================== */
.magic-toast {
    position: fixed;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%) translateY(20px);
    background: var(--secondary);
    color: #fff;
    padding: 14px 28px;
    border-radius: 50px;
    font-size: 14px;
    font-weight: 500;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.15);
    z-index: 9999;
    opacity: 0;
    transition: all 0.3s ease;
    pointer-events: none;
}

/* ==================== 响应式 ==================== */
@media (max-width: 1100px) {
    .hero-container,
    .solution-container,
    .differentiation-container {
        grid-template-columns: 1fr;
        gap: 60px;
    }

    .hero-content {
        text-align: center;
    }

    .hero-subtitle {
        margin-left: auto;
        margin-right: auto;
    }

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

    .hero-trust {
        justify-content: center;
    }

    .hero-visual {
        max-width: 700px;
        margin: 0 auto;
    }

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

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

    .scenario-card.wide {
        grid-column: span 2;
    }

    .ai-demo-panel {
        grid-template-columns: 1fr;
    }

    .ai-demo-panel.active {
        display: flex;
        flex-direction: column;
    }

    .differentiation-visual {
        max-width: 500px;
        margin: 0 auto;
    }
}

@media (max-width: 768px) {
    .section {
        padding: 80px 0;
    }

    .section-header h2 {
        font-size: 28px;
    }

    .nav {
        position: fixed;
        top: 76px;
        left: 0;
        right: 0;
        background: #fff;
        padding: 24px;
        border-bottom: 1px solid var(--border);
        transform: translateY(-150%);
        opacity: 0;
        visibility: hidden;
        transition: var(--transition);
        max-height: calc(100vh - 76px);
        overflow-y: auto;
    }

    .nav.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }

    .nav ul {
        flex-direction: column;
        gap: 20px;
    }

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

    .header-actions .btn {
        display: none;
    }

    .hero {
        min-height: auto;
        padding: 130px 0 60px;
    }

    .hero-content h1 {
        font-size: 34px;
    }

    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }

    .app-window {
        height: auto;
        flex-direction: column;
    }

    .app-sidebar {
        width: 100%;
        flex-direction: row;
        justify-content: space-between;
        padding: 12px 16px;
    }

    .app-nav {
        flex-direction: row;
        flex: 0;
    }

    .app-main {
        grid-template-columns: 1fr;
        min-height: 400px;
    }

    .app-chat-list {
        display: none;
    }

    .floating-card {
        display: none;
    }

    .painpoints-grid,
    .features-grid,
    .scenarios-grid,
    .security-grid,
    .diff-grid {
        grid-template-columns: 1fr;
    }

    .scenario-card.wide {
        grid-column: span 1;
    }

    .solution-flow {
        flex-direction: column;
        align-items: stretch;
    }

    .flow-arrow {
        transform: rotate(90deg);
        text-align: center;
    }

    .ai-tabs {
        justify-content: center;
    }

    .ai-tab {
        padding: 10px 16px;
        font-size: 14px;
    }

    .ai-demo-panel {
        padding: 28px;
    }

    .testimonial-card {
        padding: 32px 24px;
    }

    .testimonial-card > p {
        font-size: 18px;
    }

    .cta-content h2 {
        font-size: 28px;
    }

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

    .contact-form {
        padding: 28px;
    }

    .form-row {
        grid-template-columns: 1fr;
        margin-bottom: 0;
    }

    .footer-top {
        grid-template-columns: 1fr;
        gap: 40px;
    }

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