/* ==================== CSS 变量 ==================== */
:root {
    --color-primary: #6366F1;
    --color-primary-dark: #4F46E5;
    --color-primary-light: #818CF8;
    --color-accent: #06B6D4;
    --color-accent-dark: #0891B2;
    --color-purple: #8B5CF6;
    --color-green: #10B981;
    --color-orange: #F59E0B;
    --color-red: #EF4444;
    --color-pink: #EC4899;

    --color-bg: #ffffff;
    --color-bg-alt: #F8FAFC;
    --color-bg-dark: #0F172A;
    --color-text: #1E293B;
    --color-text-light: #64748B;
    --color-text-lighter: #94A3B8;
    --color-border: #E2E8F0;
    --color-border-light: #F1F5F9;

    --gradient-primary: linear-gradient(135deg, #6366F1 0%, #06B6D4 100%);
    --gradient-purple: linear-gradient(135deg, #8B5CF6 0%, #6366F1 100%);
    --gradient-blue: linear-gradient(135deg, #3B82F6 0%, #6366F1 100%);
    --gradient-cyan: linear-gradient(135deg, #06B6D4 0%, #3B82F6 100%);
    --gradient-green: linear-gradient(135deg, #10B981 0%, #06B6D4 100%);
    --gradient-orange: linear-gradient(135deg, #F59E0B 0%, #EF4444 100%);
    --gradient-hero: linear-gradient(180deg, #EEF2FF 0%, #ffffff 100%);

    --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
    --shadow: 0 4px 6px -1px rgba(0,0,0,0.07), 0 2px 4px -1px rgba(0,0,0,0.04);
    --shadow-md: 0 10px 15px -3px rgba(0,0,0,0.08), 0 4px 6px -2px rgba(0,0,0,0.04);
    --shadow-lg: 0 20px 25px -5px rgba(0,0,0,0.08), 0 10px 10px -5px rgba(0,0,0,0.03);
    --shadow-xl: 0 25px 50px -12px rgba(0,0,0,0.12);
    --shadow-primary: 0 4px 14px rgba(99,102,241,0.35);

    --radius-sm: 8px;
    --radius: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --radius-full: 9999px;

    --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
    --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 0.6s 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: var(--font);
    color: var(--color-text);
    background: var(--color-bg);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
}

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

ul {
    list-style: none;
}

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

/* ==================== 布局 ==================== */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

.section {
    padding: 100px 0;
    position: relative;
}

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

.section-tag {
    display: inline-block;
    padding: 6px 16px;
    background: rgba(99, 102, 241, 0.1);
    color: var(--color-primary);
    font-size: 14px;
    font-weight: 600;
    border-radius: var(--radius-full);
    margin-bottom: 20px;
    letter-spacing: 0.3px;
}

.tag-light {
    background: rgba(255, 255, 255, 0.15);
    color: rgba(255, 255, 255, 0.9);
}

.section-title {
    font-size: 40px;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 16px;
    letter-spacing: -0.02em;
}

.section-desc {
    font-size: 18px;
    color: var(--color-text-light);
    line-height: 1.6;
}

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

/* ==================== 按钮 ==================== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 24px;
    font-size: 15px;
    font-weight: 600;
    border-radius: var(--radius);
    border: none;
    cursor: pointer;
    transition: all var(--transition);
    white-space: nowrap;
    font-family: var(--font);
}

.btn-sm {
    padding: 8px 18px;
    font-size: 14px;
}

.btn-lg {
    padding: 14px 32px;
    font-size: 16px;
}

.btn-block {
    display: flex;
    justify-content: center;
    width: 100%;
}

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

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(99, 102, 241, 0.45);
}

.btn-ghost {
    background: rgba(99, 102, 241, 0.08);
    color: var(--color-primary);
}

.btn-ghost:hover {
    background: rgba(99, 102, 241, 0.15);
}

.btn-outline {
    background: transparent;
    color: var(--color-text);
    border: 2px solid var(--color-border);
}

.btn-outline:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
    background: rgba(99, 102, 241, 0.04);
}

/* ==================== 导航栏 ==================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    transition: all var(--transition);
    padding: 16px 0;
}

.navbar.scrolled {
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    box-shadow: var(--shadow);
    padding: 10px 0;
}

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

.nav-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 800;
    font-size: 20px;
}

.logo-icon {
    display: flex;
    align-items: center;
}

.logo-text {
    letter-spacing: -0.02em;
}

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

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

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

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--gradient-primary);
    border-radius: 2px;
    transform: scaleX(0);
    transition: transform var(--transition);
}

.nav-link:hover::after {
    transform: scaleX(1);
}

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

.nav-cta {
    color: #fff;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
}

.nav-toggle span {
    width: 24px;
    height: 2px;
    background: var(--color-text);
    border-radius: 2px;
    transition: all var(--transition);
}

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

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

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

/* ==================== Hero 区域 ==================== */
.hero {
    position: relative;
    padding: 140px 0 120px;
    background: var(--gradient-hero);
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 0;
}

.blob {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.35;
    animation: float 20s ease-in-out infinite;
}

.blob-1 {
    width: 500px;
    height: 500px;
    background: var(--color-primary);
    top: -100px;
    right: -100px;
}

.blob-2 {
    width: 400px;
    height: 400px;
    background: var(--color-accent);
    bottom: -100px;
    left: -50px;
    animation-delay: -5s;
}

.blob-3 {
    width: 300px;
    height: 300px;
    background: var(--color-purple);
    top: 40%;
    left: 50%;
    animation-delay: -10s;
    opacity: 0.2;
}

@keyframes float {
    0%, 100% { transform: translate(0, 0) scale(1); }
    33% { transform: translate(30px, -30px) scale(1.05); }
    66% { transform: translate(-20px, 20px) scale(0.95); }
}

.grid-overlay {
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(99,102,241,0.04) 1px, transparent 1px),
        linear-gradient(90deg, rgba(99,102,241,0.04) 1px, transparent 1px);
    background-size: 40px 40px;
    mask-image: radial-gradient(ellipse at center, black 40%, transparent 70%);
    -webkit-mask-image: radial-gradient(ellipse at center, black 40%, transparent 70%);
}

.hero .container {
    position: relative;
    z-index: 1;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 18px;
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(8px);
    border: 1px solid rgba(99, 102, 241, 0.2);
    border-radius: var(--radius-full);
    font-size: 14px;
    font-weight: 500;
    color: var(--color-text);
    margin-bottom: 24px;
    box-shadow: var(--shadow-sm);
}

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

@keyframes pulse {
    0%, 100% { opacity: 1; box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.4); }
    50% { opacity: 0.6; box-shadow: 0 0 0 6px rgba(16, 185, 129, 0); }
}

.hero-title {
    font-size: 60px;
    font-weight: 900;
    line-height: 1.1;
    letter-spacing: -0.03em;
    margin-bottom: 24px;
}

.hero-subtitle {
    font-size: 19px;
    color: var(--color-text-light);
    line-height: 1.7;
    margin-bottom: 36px;
    max-width: 520px;
}

.hero-actions {
    display: flex;
    gap: 16px;
    margin-bottom: 36px;
    flex-wrap: wrap;
}

.hero-platforms {
    display: flex;
    align-items: center;
    gap: 16px;
}

.platform-label {
    font-size: 14px;
    color: var(--color-text-lighter);
    font-weight: 500;
}

.platform-icons {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

.platform-tag {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 12px;
    background: rgba(255, 255, 255, 0.6);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-full);
    font-size: 13px;
    font-weight: 500;
    color: var(--color-text-light);
}

/* ==================== 产品模拟界面 ==================== */
.hero-mockup {
    position: relative;
}

.mockup-window {
    background: #fff;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
    overflow: hidden;
    border: 1px solid var(--color-border);
}

.mockup-titlebar {
    background: #F8FAFC;
    padding: 12px 16px;
    display: flex;
    align-items: center;
    gap: 8px;
    border-bottom: 1px solid var(--color-border);
}

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

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

.mockup-title {
    margin-left: auto;
    margin-right: auto;
    font-size: 13px;
    font-weight: 600;
    color: var(--color-text-light);
}

.mockup-body {
    display: flex;
    height: 420px;
}

.mockup-sidebar {
    width: 180px;
    background: #FAFBFC;
    border-right: 1px solid var(--color-border);
    padding: 16px 0;
    flex-shrink: 0;
}

.mockup-sidebar-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 16px;
    font-size: 13px;
    color: var(--color-text-light);
    cursor: pointer;
    transition: all 0.2s;
}

.mockup-sidebar-item:hover {
    background: rgba(99, 102, 241, 0.05);
    color: var(--color-text);
}

.mockup-sidebar-item.active {
    background: rgba(99, 102, 241, 0.1);
    color: var(--color-primary);
    font-weight: 600;
}

.mockup-chat {
    flex: 1;
    display: flex;
    flex-direction: column;
    padding: 20px;
    gap: 16px;
}

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

.msg-avatar {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 13px;
    font-weight: 600;
    flex-shrink: 0;
}

.user-avatar {
    background: var(--gradient-blue);
    color: #fff;
}

.ai-avatar {
    background: var(--gradient-primary);
    color: #fff;
}

.msg-bubble {
    padding: 12px 16px;
    border-radius: var(--radius);
    font-size: 14px;
    line-height: 1.5;
    max-width: 85%;
}

.user-bubble {
    background: var(--gradient-primary);
    color: #fff;
}

.ai-bubble {
    background: #F8FAFC;
    border: 1px solid var(--color-border);
    color: var(--color-text);
}

.ai-typing {
    font-size: 13px;
    color: var(--color-text-light);
    margin-bottom: 8px;
    font-style: italic;
}

.ai-steps {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.ai-step {
    font-size: 13px;
    color: var(--color-text-lighter);
    padding-left: 20px;
    position: relative;
}

.ai-step::before {
    content: '○';
    position: absolute;
    left: 0;
}

.ai-step.done {
    color: var(--color-green);
}

.ai-step.done::before {
    content: '✓';
    font-weight: 700;
}

.ai-step.active {
    color: var(--color-primary);
    font-weight: 500;
}

.ai-step.active::before {
    content: '◐';
    animation: spin 2s linear infinite;
}

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

.mockup-input {
    margin-top: auto;
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 14px;
    background: #F8FAFC;
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
}

.mockup-input-placeholder {
    flex: 1;
    font-size: 13px;
    color: var(--color-text-lighter);
}

.mockup-send {
    width: 30px;
    height: 30px;
    border-radius: var(--radius-sm);
    background: var(--gradient-primary);
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
}

.mockup-float-card {
    position: absolute;
    background: #fff;
    border-radius: var(--radius);
    padding: 12px 16px;
    box-shadow: var(--shadow-lg);
    display: flex;
    align-items: center;
    gap: 12px;
    animation: floatCard 3s ease-in-out infinite;
}

.card-1 {
    top: 20px;
    right: -30px;
    animation-delay: 0s;
}

.card-2 {
    bottom: 40px;
    left: -40px;
    animation-delay: -1.5s;
}

@keyframes floatCard {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

.float-card-title {
    font-size: 14px;
    font-weight: 700;
    color: var(--color-text);
}

.float-card-desc {
    font-size: 12px;
    color: var(--color-text-light);
}

.hero-wave {
    position: absolute;
    bottom: -1px;
    left: 0;
    right: 0;
    z-index: 1;
}

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

/* ==================== 信任栏 ==================== */
.trust-bar {
    padding: 48px 0;
    background: #fff;
    border-bottom: 1px solid var(--color-border-light);
}

.trust-label {
    text-align: center;
    font-size: 14px;
    color: var(--color-text-lighter);
    margin-bottom: 24px;
    font-weight: 500;
}

.trust-logos {
    display: flex;
    justify-content: center;
    gap: 48px;
    flex-wrap: wrap;
}

.trust-logo {
    font-size: 18px;
    font-weight: 700;
    color: var(--color-text-lighter);
    opacity: 0.6;
    transition: opacity var(--transition);
}

.trust-logo:hover {
    opacity: 1;
}

/* ==================== 产品演示 ==================== */
.section-demo {
    background: var(--color-bg-alt);
}

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

.demo-tab {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 20px;
    background: #fff;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-full);
    font-size: 14px;
    font-weight: 600;
    color: var(--color-text-light);
    cursor: pointer;
    transition: all var(--transition);
    font-family: var(--font);
}

.demo-tab:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
}

.demo-tab.active {
    background: var(--gradient-primary);
    color: #fff;
    border-color: transparent;
    box-shadow: var(--shadow-primary);
}

.demo-panel {
    background: #fff;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
    overflow: hidden;
    border: 1px solid var(--color-border);
    max-width: 900px;
    margin: 0 auto;
}

.demo-content {
    display: none;
    padding: 32px;
}

.demo-content.active {
    display: block;
    animation: fadeIn 0.5s ease;
}

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

.demo-chat {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.demo-msg {
    display: flex;
    gap: 12px;
}

.demo-avatar {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    font-weight: 600;
    flex-shrink: 0;
    background: var(--gradient-blue);
    color: #fff;
}

.demo-ai-avatar {
    background: var(--gradient-primary);
}

.demo-bubble {
    padding: 16px 20px;
    border-radius: var(--radius);
    font-size: 15px;
    line-height: 1.6;
    max-width: 85%;
}

.demo-user .demo-bubble {
    background: var(--gradient-primary);
    color: #fff;
}

.demo-ai-bubble {
    background: #F8FAFC;
    border: 1px solid var(--color-border);
    color: var(--color-text);
    flex: 1;
}

.demo-ai-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 16px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--color-border-light);
}

.demo-ai-status {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 13px;
    font-weight: 600;
    color: var(--color-primary);
}

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

.status-dot.done {
    background: var(--color-green);
    animation: none;
}

.demo-ai-timer {
    font-size: 13px;
    color: var(--color-text-lighter);
    font-variant-numeric: tabular-nums;
}

.demo-task-list {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin-bottom: 20px;
}

.demo-task {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 14px;
    padding: 8px 0;
}

.task-check {
    width: 20px;
    height: 20px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    border: 2px solid var(--color-border);
    color: var(--color-text-lighter);
}

.demo-task.done .task-check {
    background: var(--color-green);
    border-color: var(--color-green);
    color: #fff;
}

.demo-task.done .task-text {
    color: var(--color-text);
}

.demo-task.active .task-check {
    border-color: var(--color-primary);
    color: var(--color-primary);
    animation: spin 2s linear infinite;
}

.demo-task.active .task-text {
    color: var(--color-primary);
    font-weight: 600;
}

.demo-task.pending .task-text {
    color: var(--color-text-lighter);
}

.task-text {
    flex: 1;
    color: var(--color-text-light);
}

.task-meta {
    font-size: 12px;
    color: var(--color-text-lighter);
}

.task-spinner svg {
    animation: spin 2s linear infinite;
}

.demo-output {
    background: #fff;
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    overflow: hidden;
}

.demo-output-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 16px;
    background: #F8FAFC;
    border-bottom: 1px solid var(--color-border);
    font-size: 13px;
    font-weight: 600;
    color: var(--color-text);
}

.demo-output-tag {
    font-size: 12px;
    padding: 2px 10px;
    background: rgba(99, 102, 241, 0.1);
    color: var(--color-primary);
    border-radius: var(--radius-full);
    font-weight: 600;
}

.demo-output-tag.active {
    background: rgba(16, 185, 129, 0.1);
    color: var(--color-green);
}

.demo-output-body {
    padding: 16px;
    font-size: 14px;
    line-height: 1.6;
}

.demo-output-body h3 {
    font-size: 16px;
    font-weight: 700;
    margin-bottom: 12px;
}

.demo-output-body h4 {
    font-size: 14px;
    font-weight: 600;
    margin: 10px 0 4px;
    color: var(--color-text);
}

.demo-output-body p {
    font-size: 13px;
    color: var(--color-text-light);
    margin-bottom: 8px;
}

.ppt-preview {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
}

.ppt-slide {
    background: #F8FAFC;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    padding: 16px;
    aspect-ratio: 16/9;
    display: flex;
    flex-direction: column;
}

.ppt-slide-title {
    font-size: 14px;
    font-weight: 700;
    margin-bottom: 12px;
}

.ppt-slide-content {
    flex: 1;
    display: flex;
    align-items: flex-end;
    gap: 8px;
}

.ppt-chart {
    display: flex;
    align-items: flex-end;
    gap: 8px;
    height: 80px;
    width: 100%;
}

.ppt-bar {
    flex: 1;
    background: var(--gradient-primary);
    border-radius: 4px 4px 0 0;
    opacity: 0.8;
    min-height: 8px;
    animation: barGrow 1s ease;
}

@keyframes barGrow {
    from { height: 0; }
}

.ppt-metric {
    font-size: 12px;
    color: var(--color-text-light);
    margin-bottom: 4px;
}

.ppt-metric strong {
    color: var(--color-text);
    font-size: 14px;
}

.data-result {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-bottom: 16px;
}

.data-row {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 8px 12px;
    background: #F8FAFC;
    border-radius: var(--radius-sm);
}

.data-rank {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: var(--gradient-primary);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    font-weight: 700;
    flex-shrink: 0;
}

.data-name {
    flex: 1;
    font-weight: 600;
    font-size: 14px;
}

.data-growth {
    font-size: 14px;
    font-weight: 700;
    font-variant-numeric: tabular-nums;
}

.data-growth.positive {
    color: var(--color-green);
}

.data-chart {
    margin-top: 8px;
    height: 60px;
}

.auto-rule {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
    padding: 12px;
    background: #F8FAFC;
    border-radius: var(--radius-sm);
}

.auto-trigger, .auto-action {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 13px;
    font-weight: 500;
}

.auto-icon {
    font-size: 16px;
}

.auto-arrow {
    color: var(--color-text-lighter);
    font-size: 16px;
}

.auto-note {
    font-size: 12px;
    color: var(--color-text-lighter);
    margin-top: 8px;
}

/* ==================== 功能特性 ==================== */
.section-features {
    background: #fff;
}

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

.feature-card {
    background: #fff;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 32px;
    transition: all var(--transition);
    position: relative;
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--gradient-primary);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform var(--transition);
}

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

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

.feature-icon {
    width: 56px;
    height: 56px;
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
}

.icon-blue { background: rgba(59, 130, 246, 0.1); color: #3B82F6; }
.icon-cyan { background: rgba(6, 182, 212, 0.1); color: #06B6D4; }
.icon-purple { background: rgba(139, 92, 246, 0.1); color: #8B5CF6; }
.icon-green { background: rgba(16, 185, 129, 0.1); color: #10B981; }
.icon-orange { background: rgba(245, 158, 11, 0.1); color: #F59E0B; }
.icon-red { background: rgba(239, 68, 68, 0.1); color: #EF4444; }

.feature-title {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 10px;
}

.feature-desc {
    font-size: 15px;
    color: var(--color-text-light);
    line-height: 1.6;
}

/* ==================== 应用场景 ==================== */
.section-scenarios {
    background: var(--color-bg-alt);
}

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

.scenario-card {
    background: #fff;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: all var(--transition);
}

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

.scenario-img {
    height: 160px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.gradient-blue { background: var(--gradient-blue); }
.gradient-cyan { background: var(--gradient-cyan); }
.gradient-purple { background: var(--gradient-purple); }
.gradient-green { background: var(--gradient-green); }

.scenario-body {
    padding: 24px;
}

.scenario-title {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 10px;
}

.scenario-desc {
    font-size: 14px;
    color: var(--color-text-light);
    line-height: 1.6;
    margin-bottom: 16px;
}

.scenario-tag {
    display: inline-block;
    padding: 4px 12px;
    background: rgba(99, 102, 241, 0.08);
    color: var(--color-primary);
    border-radius: var(--radius-full);
    font-size: 13px;
    font-weight: 600;
}

/* ==================== 数据统计 ==================== */
.section-stats {
    background: var(--color-bg-dark);
    padding: 80px 0;
}

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

.stat-item {
    position: relative;
}

.stat-item:not(:last-child)::after {
    content: '';
    position: absolute;
    right: -12px;
    top: 50%;
    transform: translateY(-50%);
    width: 1px;
    height: 60px;
    background: rgba(255, 255, 255, 0.1);
}

.stat-number {
    font-size: 48px;
    font-weight: 900;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1;
    margin-bottom: 8px;
    letter-spacing: -0.03em;
}

.stat-label {
    font-size: 16px;
    color: rgba(255, 255, 255, 0.7);
    font-weight: 500;
}

/* ==================== 用户评价 ==================== */
.section-testimonials {
    background: #fff;
}

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

.testimonial-card {
    background: var(--color-bg-alt);
    border-radius: var(--radius-lg);
    padding: 28px;
    transition: all var(--transition);
    border: 1px solid var(--color-border-light);
}

.testimonial-card:hover {
    background: #fff;
    box-shadow: var(--shadow-lg);
    transform: translateY(-4px);
}

.testimonial-quote {
    font-size: 15px;
    line-height: 1.7;
    color: var(--color-text);
    margin-bottom: 20px;
    position: relative;
    padding-left: 20px;
}

.testimonial-quote::before {
    content: '"';
    position: absolute;
    left: 0;
    top: -8px;
    font-size: 32px;
    font-weight: 800;
    color: var(--color-primary);
    opacity: 0.3;
    line-height: 1;
}

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

.author-avatar {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-weight: 700;
    font-size: 18px;
    flex-shrink: 0;
}

.author-name {
    font-size: 15px;
    font-weight: 700;
    color: var(--color-text);
}

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

/* ==================== 定价方案 ==================== */
.section-pricing {
    background: var(--color-bg-alt);
}

.pricing-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    max-width: 1000px;
    margin: 0 auto;
}

.pricing-grid-2 {
    grid-template-columns: repeat(2, 1fr);
    max-width: 880px;
}

.price-custom {
    font-size: 42px !important;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1;
    display: inline-block;
    font-weight: 900;
    letter-spacing: -0.02em;
}

.pricing-card {
    background: #fff;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    padding: 36px 32px;
    transition: all var(--transition);
    position: relative;
}

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

.pricing-popular {
    border: 2px solid var(--color-primary);
    box-shadow: var(--shadow-primary);
}

.pricing-badge {
    position: absolute;
    top: -14px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--gradient-primary);
    color: #fff;
    font-size: 13px;
    font-weight: 700;
    padding: 6px 18px;
    border-radius: var(--radius-full);
    box-shadow: var(--shadow-primary);
    white-space: nowrap;
}

.pricing-header {
    margin-bottom: 8px;
}

.pricing-name {
    font-size: 22px;
    font-weight: 700;
    margin-bottom: 12px;
}

.pricing-price {
    display: flex;
    align-items: baseline;
    gap: 4px;
}

.price-currency {
    font-size: 22px;
    font-weight: 700;
    color: var(--color-text);
}

.price-amount {
    font-size: 42px;
    font-weight: 900;
    color: var(--color-text);
    letter-spacing: -0.02em;
}

.price-period {
    font-size: 14px;
    color: var(--color-text-light);
}

.price-period s {
    color: var(--color-text-lighter);
    margin-left: 4px;
}

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

.pricing-features {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin-top: 24px;
}

.pricing-features li {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 14px;
    color: var(--color-text);
}

.check {
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--color-green);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    position: relative;
}

.check::before {
    content: '';
    width: 6px;
    height: 10px;
    border: 2px solid #fff;
    border-top: none;
    border-left: none;
    transform: rotate(45deg);
    margin-top: -2px;
}

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

.link {
    color: var(--color-primary);
    font-weight: 600;
}

.link:hover {
    text-decoration: underline;
}

/* ==================== 下载区 ==================== */
.section-download {
    background: #fff;
    padding: 80px 0;
}

.download-card {
    background: var(--color-bg-dark);
    border-radius: var(--radius-xl);
    padding: 80px 40px;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.download-bg-glow {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(99,102,241,0.3) 0%, transparent 70%);
    pointer-events: none;
}

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

.download-title {
    font-size: 40px;
    font-weight: 900;
    color: #fff;
    line-height: 1.2;
    margin-bottom: 16px;
    letter-spacing: -0.02em;
}

.download-desc {
    font-size: 18px;
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: 40px;
}

.download-buttons {
    display: flex;
    justify-content: center;
    gap: 16px;
    margin-bottom: 24px;
    flex-wrap: wrap;
}

.btn-download {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 16px 28px;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: var(--radius);
    color: #fff;
    font-family: var(--font);
    transition: all var(--transition);
    backdrop-filter: blur(8px);
}

.btn-download:hover {
    background: rgba(255, 255, 255, 0.15);
    border-color: rgba(255, 255, 255, 0.4);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-download-text {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    line-height: 1.2;
}

.btn-download-label {
    font-size: 12px;
    opacity: 0.7;
}

.btn-download-platform {
    font-size: 17px;
    font-weight: 700;
}

.download-meta {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 12px;
    font-size: 13px;
    color: rgba(255, 255, 255, 0.5);
}

.dot-sep {
    width: 3px;
    height: 3px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.3);
}

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

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

.faq-item {
    background: #fff;
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    margin-bottom: 12px;
    overflow: hidden;
    transition: all var(--transition);
}

.faq-item:hover {
    border-color: rgba(99, 102, 241, 0.3);
}

.faq-item.open {
    box-shadow: var(--shadow-md);
}

.faq-question {
    width: 100%;
    padding: 20px 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: none;
    border: none;
    cursor: pointer;
    font-size: 16px;
    font-weight: 600;
    color: var(--color-text);
    text-align: left;
    font-family: var(--font);
    transition: color var(--transition);
}

.faq-question:hover {
    color: var(--color-primary);
}

.faq-icon {
    flex-shrink: 0;
    transition: transform var(--transition);
    color: var(--color-text-light);
}

.faq-item.open .faq-icon {
    transform: rotate(180deg);
    color: var(--color-primary);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition);
}

.faq-item.open .faq-answer {
    max-height: 300px;
}

.faq-answer p {
    padding: 0 24px 20px;
    font-size: 15px;
    color: var(--color-text-light);
    line-height: 1.7;
}

/* ==================== CTA ==================== */
.section-cta {
    background: #fff;
    padding: 80px 0;
}

.cta-content {
    text-align: center;
    background: var(--gradient-primary);
    border-radius: var(--radius-xl);
    padding: 64px 40px;
    position: relative;
    overflow: hidden;
}

.cta-content::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(255,255,255,0.15) 0%, transparent 60%);
    animation: rotate 20s linear infinite;
}

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

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

.cta-title {
    font-size: 36px;
    font-weight: 900;
    color: #fff;
    margin-bottom: 12px;
}

.cta-desc {
    font-size: 18px;
    color: rgba(255, 255, 255, 0.85);
    margin-bottom: 32px;
}

.cta-content .btn-primary {
    background: #fff;
    color: var(--color-primary);
}

.cta-content .btn-primary:hover {
    background: rgba(255, 255, 255, 0.9);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.2);
}

/* ==================== 页脚 ==================== */
.footer {
    background: var(--color-bg-dark);
    padding: 64px 0 24px;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 40px;
    margin-bottom: 48px;
}

.footer-brand .nav-logo {
    margin-bottom: 16px;
}

.footer-brand .logo-text {
    color: #fff;
}

.footer-tagline {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.6);
    line-height: 1.6;
    margin-bottom: 20px;
    max-width: 360px;
}

.footer-social {
    display: flex;
    gap: 12px;
}

.social-link {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.08);
    display: flex;
    align-items: center;
    justify-content: center;
    color: rgba(255, 255, 255, 0.6);
    transition: all var(--transition);
}

.social-link:hover {
    background: var(--gradient-primary);
    color: #fff;
    transform: translateY(-2px);
}

.footer-title {
    color: #fff;
    font-size: 15px;
    font-weight: 700;
    margin-bottom: 20px;
}

.footer-col {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.footer-link {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.6);
    transition: color var(--transition);
}

.footer-link:hover {
    color: #fff;
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 13px;
    color: rgba(255, 255, 255, 0.5);
}

.footer-beian {
    margin-top: 12px;
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    align-items: center;
    gap: 16px;
    font-size: 12px;
    color: rgba(255, 255, 255, 0.4);
}

.beian-link {
    color: rgba(255, 255, 255, 0.5);
    transition: color var(--transition);
}

.beian-link:hover {
    color: rgba(255, 255, 255, 0.9);
}

.beian-police {
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

.beian-icon {
    width: 16px;
    height: 16px;
    display: inline-block;
}

/* ==================== 模态弹窗 ==================== */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 2000;
    animation: fadeIn 0.3s ease;
}

.modal-overlay.active {
    display: flex;
}

.modal {
    background: #fff;
    border-radius: var(--radius-xl);
    padding: 40px;
    max-width: 440px;
    width: 90%;
    text-align: center;
    position: relative;
    box-shadow: var(--shadow-xl);
    animation: scaleIn 0.3s ease;
}

@keyframes scaleIn {
    from { transform: scale(0.9); opacity: 0; }
    to { transform: scale(1); opacity: 1; }
}

.modal-close {
    position: absolute;
    top: 16px;
    right: 16px;
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: var(--color-bg-alt);
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-text-light);
    transition: all var(--transition);
}

.modal-close:hover {
    background: var(--color-border);
    color: var(--color-text);
}

.modal-icon {
    margin-bottom: 20px;
    display: flex;
    justify-content: center;
}

.modal-title {
    font-size: 22px;
    font-weight: 700;
    margin-bottom: 8px;
}

.modal-desc {
    font-size: 15px;
    color: var(--color-text-light);
    margin-bottom: 24px;
}

.modal-progress {
    height: 6px;
    background: var(--color-border-light);
    border-radius: var(--radius-full);
    overflow: hidden;
    margin-bottom: 12px;
}

.modal-progress-bar {
    height: 100%;
    background: var(--gradient-primary);
    border-radius: var(--radius-full);
    width: 0;
    transition: width 0.3s ease;
}

.modal-version {
    font-size: 13px;
    color: var(--color-text-lighter);
}

/* ==================== 滚动动画 ==================== */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.7s ease, transform 0.7s ease;
}

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

/* ==================== 响应式 ==================== */
@media (max-width: 1024px) {
    .hero-title { font-size: 48px; }
    .section-title { font-size: 34px; }

    .hero .container {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .hero-mockup { max-width: 600px; margin: 0 auto; }

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

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

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

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

@media (max-width: 768px) {
    .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: #fff;
        flex-direction: column;
        padding: 20px;
        gap: 16px;
        box-shadow: var(--shadow-lg);
        border-top: 1px solid var(--color-border);
    }

    .nav-links.active {
        display: flex;
    }

    .nav-cta { display: none; }
    .nav-toggle { display: flex; }

    .hero { padding: 120px 0 80px; }
    .hero-title { font-size: 36px; }
    .hero-subtitle { font-size: 16px; }

    .section { padding: 60px 0; }
    .section-title { font-size: 28px; }
    .section-desc { font-size: 16px; }

    .section-header { margin-bottom: 40px; }

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

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

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

    .pricing-grid,
    .pricing-grid-2 {
        grid-template-columns: 1fr;
    }

    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 32px;
    }

    .stat-item::after { display: none; }
    .stat-number { font-size: 36px; }

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

.footer-bottom {
    flex-direction: column;
    gap: 8px;
    text-align: center;
}

.footer-beian {
    flex-direction: column;
    gap: 8px;
}

    .download-card { padding: 48px 24px; }
    .download-title { font-size: 28px; }
    .download-buttons { flex-direction: column; align-items: center; }

    .demo-content { padding: 20px; }
    .demo-bubble { max-width: 95%; }
    .demo-tabs { gap: 6px; }
    .demo-tab { padding: 8px 14px; font-size: 13px; }

    .mockup-float-card { display: none; }
    .mockup-sidebar { display: none; }

    .cta-content { padding: 40px 24px; }
    .cta-title { font-size: 26px; }

    .hero-actions { flex-direction: column; }
    .hero-actions .btn { width: 100%; justify-content: center; }
}

@media (max-width: 480px) {
    .hero-title { font-size: 30px; }
    .section-title { font-size: 24px; }
    .stat-number { font-size: 30px; }
    .stats-grid { grid-template-columns: 1fr; }
}