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

:root {
    /* 主题色 */
    --purple: #8B5CF6;
    --purple-dark: #6C2BD9;
    --purple-light: #A78BFA;
    --blue: #0EA5E9;
    --blue-dark: #0284C7;
    --blue-light: #38BDF8;
    --coral: #F97316;
    --coral-light: #FB923C;
    --green: #10B981;
    --pink: #EC4899;
    --orange: #F59E0B;
    
    /* 中性色 */
    --bg: #FFFFFF;
    --bg-soft: #F8F7FC;
    --bg-card: #FFFFFF;
    --text: #1A1A2E;
    --text-secondary: #5A5A72;
    --text-tertiary: #9494A9;
    --border: #E8E8F0;
    --border-light: #F0F0F5;
    
    /* 渐变 */
    --gradient-primary: linear-gradient(135deg, #8B5CF6 0%, #0EA5E9 100%);
    --gradient-hero: linear-gradient(135deg, #F5F0FF 0%, #E8F4FD 50%, #FFF0F5 100%);
    --gradient-cta: linear-gradient(135deg, #6C2BD9 0%, #0284C7 100%);
    
    /* 阴影 */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.04);
    --shadow-md: 0 8px 30px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 20px 60px rgba(0, 0, 0, 0.08);
    --shadow-purple: 0 8px 30px rgba(139, 92, 246, 0.25);
    --shadow-blue: 0 8px 30px rgba(14, 165, 233, 0.25);
    
    /* 圆角 */
    --radius-sm: 8px;
    --radius-md: 16px;
    --radius-lg: 24px;
    --radius-xl: 32px;
}

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

body {
    font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    color: var(--text);
    background: var(--bg);
    line-height: 1.7;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

ul {
    list-style: none;
}

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

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

/* ===== 按钮 ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    font-family: inherit;
    font-size: 0.95rem;
    font-weight: 600;
    padding: 12px 28px;
    border-radius: 12px;
    border: none;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    white-space: nowrap;
    position: relative;
    overflow: hidden;
}

.btn-sm {
    padding: 8px 20px;
    font-size: 0.875rem;
}

.btn-lg {
    padding: 16px 36px;
    font-size: 1.05rem;
}

.btn-block {
    width: 100%;
}

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

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 40px rgba(139, 92, 246, 0.4);
}

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

.btn-outline:hover {
    border-color: var(--purple);
    color: var(--purple);
    background: rgba(139, 92, 246, 0.05);
}

.btn-white {
    background: white;
    color: var(--purple-dark);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.15);
}

.btn-white:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.2);
}

.btn-glass {
    background: rgba(255, 255, 255, 0.15);
    color: white;
    border: 2px solid rgba(255, 255, 255, 0.4);
    backdrop-filter: blur(10px);
}

.btn-glass:hover {
    background: rgba(255, 255, 255, 0.25);
    border-color: rgba(255, 255, 255, 0.6);
}

/* ===== 导航栏 ===== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 16px 0;
    transition: all 0.3s ease;
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
}

.navbar.scrolled {
    padding: 10px 0;
    background: rgba(255, 255, 255, 0.95);
    box-shadow: var(--shadow-sm);
}

.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: 700;
    font-size: 1.25rem;
}

.logo-icon {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.logo-icon svg {
    width: 100%;
    height: 100%;
}

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

.nav-menu {
    display: flex;
    gap: 36px;
    list-style: none;
}

.nav-link {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text-secondary);
    transition: color 0.2s;
    position: relative;
}

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

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-primary);
    transition: width 0.3s;
    border-radius: 2px;
}

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

.nav-actions {
    display: flex;
    align-items: center;
    gap: 20px;
}

.nav-login {
    font-weight: 500;
}

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

.nav-toggle span {
    width: 24px;
    height: 2px;
    background: var(--text);
    border-radius: 2px;
    transition: all 0.3s;
}

.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;
    overflow: hidden;
    z-index: 0;
}

.hero-blob {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.4;
    animation: blob-float 20s ease-in-out infinite;
}

.blob-1 {
    width: 500px;
    height: 500px;
    background: var(--purple-light);
    top: -100px;
    left: -100px;
}

.blob-2 {
    width: 400px;
    height: 400px;
    background: var(--blue-light);
    top: 200px;
    right: -50px;
    animation-delay: -5s;
}

.blob-3 {
    width: 300px;
    height: 300px;
    background: #FBCFE8;
    bottom: -50px;
    left: 40%;
    animation-delay: -10s;
}

@keyframes blob-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); }
}

.hero-container {
    position: relative;
    z-index: 1;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(10px);
    padding: 8px 16px;
    border-radius: 50px;
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--purple-dark);
    margin-bottom: 24px;
    border: 1px solid rgba(139, 92, 246, 0.2);
    animation: badge-pulse 2s ease-in-out infinite;
}

@keyframes badge-pulse {
    0%, 100% { box-shadow: 0 0 0 0 rgba(139, 92, 246, 0.2); }
    50% { box-shadow: 0 0 0 8px rgba(139, 92, 246, 0); }
}

.badge-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--green);
    box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.2);
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 900;
    line-height: 1.2;
    margin-bottom: 24px;
    letter-spacing: -0.02em;
}

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

.hero-subtitle {
    font-size: 1.15rem;
    color: var(--text-secondary);
    margin-bottom: 36px;
    line-height: 1.8;
}

.hero-actions {
    display: flex;
    gap: 16px;
    margin-bottom: 48px;
}

.hero-stats {
    display: flex;
    align-items: center;
    gap: 32px;
}

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

.stat-number {
    font-size: 2rem;
    font-weight: 900;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1;
}

.stat-label {
    font-size: 0.85rem;
    color: var(--text-tertiary);
    margin-top: 4px;
}

.stat-divider {
    width: 1px;
    height: 40px;
    background: var(--border);
}

/* Hero 视觉 */
.hero-visual {
    position: relative;
    height: 480px;
}

.hero-card-stack {
    position: relative;
    width: 100%;
    height: 100%;
}

.floating-card {
    position: absolute;
    background: white;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    animation: float 6s ease-in-out infinite;
}

.card-1 {
    width: 380px;
    top: 40px;
    left: 20px;
    z-index: 3;
    animation-delay: 0s;
}

.card-2 {
    padding: 16px 20px;
    top: 10px;
    right: 0;
    display: flex;
    align-items: center;
    gap: 12px;
    z-index: 2;
    animation-delay: -2s;
}

.card-3 {
    padding: 16px 20px;
    bottom: 40px;
    right: 30px;
    display: flex;
    align-items: center;
    gap: 12px;
    z-index: 2;
    animation-delay: -4s;
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-15px); }
}

.card-header {
    display: flex;
    gap: 8px;
    padding: 12px 16px;
    border-bottom: 1px solid var(--border-light);
}

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

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

.card-body {
    padding: 20px 16px;
}

.typing-line {
    height: 12px;
    background: linear-gradient(90deg, var(--purple-light) 0%, var(--blue-light) 100%);
    border-radius: 6px;
    margin-bottom: 12px;
    width: 100%;
    animation: typing-fill 1.5s ease-out forwards;
    animation-delay: var(--delay, 0s);
    opacity: 0;
    transform: scaleX(0);
    transform-origin: left;
}

.typing-line.short {
    width: 60%;
}

@keyframes typing-fill {
    to {
        opacity: 1;
        transform: scaleX(1);
    }
}

.mini-icon {
    width: 44px;
    height: 44px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    flex-shrink: 0;
}

.mini-icon.purple { background: var(--gradient-primary); }
.mini-icon.blue { background: linear-gradient(135deg, #0EA5E9 0%, #6366F1 100%); }

.mini-title {
    font-size: 0.9rem;
    font-weight: 700;
    color: var(--text);
}

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

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

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

/* ===== 数据栏 ===== */
.trust-bar {
    padding: 60px 0;
    background: white;
}

.trust-grid {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 64px;
    flex-wrap: wrap;
}

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

.trust-number {
    font-size: 2.5rem;
    font-weight: 900;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1;
}

.trust-number span {
    font-size: 1.5rem;
}

.trust-label {
    font-size: 0.85rem;
    color: var(--text-tertiary);
    margin-top: 6px;
    font-weight: 500;
}

/* ===== 通用 Section Header ===== */
.section-header {
    text-align: center;
    max-width: 680px;
    margin: 0 auto 64px;
}

.section-tag {
    display: inline-block;
    padding: 6px 16px;
    background: rgba(139, 92, 246, 0.1);
    color: var(--purple);
    font-size: 0.85rem;
    font-weight: 600;
    border-radius: 50px;
    margin-bottom: 16px;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 900;
    margin-bottom: 16px;
    letter-spacing: -0.02em;
}

.section-desc {
    font-size: 1.1rem;
    color: var(--text-secondary);
}

/* ===== 功能特性 ===== */
.features {
    padding: 100px 0;
    background: var(--bg-soft);
}

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

.feature-card {
    background: white;
    padding: 36px 32px;
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-light);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--gradient-primary);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.3s;
}

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

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

.feature-icon {
    width: 64px;
    height: 64px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 24px;
    transition: transform 0.3s;
}

.feature-card:hover .feature-icon {
    transform: scale(1.1) rotate(-5deg);
}

.icon-purple { background: rgba(139, 92, 246, 0.1); color: var(--purple); }
.icon-blue { background: rgba(14, 165, 233, 0.1); color: var(--blue); }
.icon-coral { background: rgba(249, 115, 22, 0.1); color: var(--coral); }
.icon-green { background: rgba(16, 185, 129, 0.1); color: var(--green); }
.icon-orange { background: rgba(245, 158, 11, 0.1); color: var(--orange); }
.icon-pink { background: rgba(236, 72, 153, 0.1); color: var(--pink); }

.feature-title {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 12px;
}

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

/* ===== 使用方式 ===== */
.howitworks {
    padding: 100px 0;
    background: white;
}

.steps-wrapper {
    position: relative;
    max-width: 900px;
    margin: 0 auto;
}

.step-line {
    position: absolute;
    left: 50%;
    top: 60px;
    bottom: 60px;
    width: 2px;
    background: linear-gradient(180deg, var(--purple-light), var(--blue-light));
    transform: translateX(-50%);
    opacity: 0.3;
}

.step-item {
    display: flex;
    align-items: center;
    gap: 48px;
    margin-bottom: 80px;
    position: relative;
}

.step-item:last-child {
    margin-bottom: 0;
}

.step-item:nth-child(odd) {
    flex-direction: row;
}

.step-item:nth-child(even) {
    flex-direction: row-reverse;
}

.step-number {
    flex-shrink: 0;
    width: 80px;
    height: 80px;
    border-radius: 50%;
    background: var(--gradient-primary);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 900;
    box-shadow: var(--shadow-purple);
    position: relative;
    z-index: 1;
}

.step-content {
    flex: 1;
}

.step-title {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 12px;
}

.step-desc {
    font-size: 1rem;
    color: var(--text-secondary);
    line-height: 1.8;
}

.step-visual {
    flex: 1;
}

.step-card {
    background: var(--bg-soft);
    padding: 24px;
    border-radius: var(--radius-md);
    border: 1px solid var(--border-light);
}

.step-card-icon {
    width: 40px;
    height: 40px;
    border-radius: 10px;
    background: var(--gradient-primary);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 16px;
}

.step-card-text {
    font-size: 0.95rem;
    color: var(--text);
    font-style: italic;
}

.style-chips {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.chip {
    padding: 8px 16px;
    border-radius: 50px;
    font-size: 0.85rem;
    font-weight: 500;
    background: white;
    border: 1px solid var(--border);
    color: var(--text-secondary);
    transition: all 0.2s;
    cursor: pointer;
}

.chip.active {
    background: var(--gradient-primary);
    color: white;
    border-color: transparent;
}

.export-buttons {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.export-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 10px 16px;
    border-radius: 10px;
    border: 1px solid var(--border);
    background: white;
    font-size: 0.85rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
    color: var(--text-secondary);
}

.export-btn:hover {
    border-color: var(--purple);
    color: var(--purple);
}

.export-btn.primary {
    background: var(--gradient-primary);
    color: white;
    border-color: transparent;
}

/* ===== 应用场景 ===== */
.usecases {
    padding: 100px 0;
    background: var(--bg-soft);
}

.usecase-tabs {
    display: flex;
    justify-content: center;
    gap: 12px;
    margin-bottom: 48px;
    flex-wrap: wrap;
}

.usecase-tab {
    padding: 12px 28px;
    border-radius: 50px;
    border: 2px solid var(--border);
    background: white;
    font-family: inherit;
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.3s;
}

.usecase-tab:hover {
    border-color: var(--purple-light);
    color: var(--purple);
}

.usecase-tab.active {
    background: var(--gradient-primary);
    color: white;
    border-color: transparent;
    box-shadow: var(--shadow-purple);
}

.usecase-panel {
    display: none;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
    animation: fadeIn 0.5s ease;
}

.usecase-panel.active {
    display: grid;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

.usecase-info h3 {
    font-size: 1.75rem;
    font-weight: 700;
    margin-bottom: 16px;
}

.usecase-info > p {
    font-size: 1.05rem;
    color: var(--text-secondary);
    margin-bottom: 24px;
    line-height: 1.8;
}

.usecase-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.usecase-list li {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 0.95rem;
    color: var(--text);
}

.check-icon {
    flex-shrink: 0;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: rgba(16, 185, 129, 0.1);
    color: var(--green);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.75rem;
    font-weight: 700;
}

.usecase-mockup {
    background: white;
    border-radius: var(--radius-lg);
    padding: 24px;
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--border-light);
}

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

.mockup-avatar {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: var(--gradient-primary);
}

.mockup-avatar.avatar-blue { background: linear-gradient(135deg, #0EA5E9, #6366F1); }
.mockup-avatar.avatar-green { background: linear-gradient(135deg, #10B981, #059669); }
.mockup-avatar.avatar-coral { background: linear-gradient(135deg, #F97316, #EC4899); }

.mockup-name {
    font-weight: 700;
    font-size: 0.95rem;
}

.mockup-status {
    font-size: 0.8rem;
    color: var(--green);
}

.mockup-chat {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.chat-msg {
    background: var(--bg-soft);
    padding: 12px 16px;
    border-radius: 12px 12px 12px 4px;
    font-size: 0.9rem;
    color: var(--text);
    align-self: flex-start;
    max-width: 80%;
}

.chat-card {
    background: white;
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 16px;
    box-shadow: var(--shadow-sm);
}

.chat-card-title {
    font-size: 0.9rem;
    font-weight: 700;
    margin-bottom: 8px;
    color: var(--purple);
}

.chat-card-body {
    font-size: 0.85rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

.chat-card-tags {
    margin-top: 8px;
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.chat-card-tags span {
    font-size: 0.75rem;
    color: var(--blue);
    background: rgba(14, 165, 233, 0.1);
    padding: 4px 10px;
    border-radius: 50px;
}

/* ===== 定价方案 ===== */
.pricing {
    padding: 100px 0;
    background: white;
}

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

.pricing-card {
    background: white;
    border: 2px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 40px 32px;
    text-align: center;
    transition: all 0.3s;
    position: relative;
}

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

.pricing-popular {
    border-color: var(--purple);
    box-shadow: var(--shadow-purple);
    transform: scale(1.05);
}

.pricing-popular:hover {
    transform: scale(1.05) translateY(-4px);
}

.popular-badge {
    position: absolute;
    top: -14px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--gradient-primary);
    color: white;
    padding: 6px 20px;
    border-radius: 50px;
    font-size: 0.8rem;
    font-weight: 700;
    white-space: nowrap;
}

.pricing-header {
    margin-bottom: 24px;
}

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

.pricing-desc {
    font-size: 0.9rem;
    color: var(--text-tertiary);
}

.pricing-price {
    margin-bottom: 32px;
    display: flex;
    align-items: baseline;
    justify-content: center;
    gap: 2px;
}

.price-symbol {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text);
}

.price-number {
    font-size: 3rem;
    font-weight: 900;
    color: var(--text);
    line-height: 1;
}

.price-period {
    font-size: 1rem;
    color: var(--text-tertiary);
    font-weight: 500;
}

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

.pricing-features li {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 0.9rem;
    color: var(--text);
}

.pricing-features li.disabled {
    color: var(--text-tertiary);
    opacity: 0.6;
}

.pricing-features .check-icon {
    background: rgba(16, 185, 129, 0.1);
    color: var(--green);
}

.pricing-features li.disabled .check-icon {
    background: rgba(0, 0, 0, 0.05);
    color: var(--text-tertiary);
}

/* ===== 用户评价 ===== */
.testimonials {
    padding: 100px 0;
    background: var(--bg-soft);
}

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

.testimonial-card {
    background: white;
    padding: 36px 32px;
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-light);
    transition: all 0.3s;
}

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

.testimonial-stars {
    color: #FBBF24;
    font-size: 1.1rem;
    letter-spacing: 2px;
    margin-bottom: 20px;
}

.testimonial-text {
    font-size: 1rem;
    color: var(--text);
    line-height: 1.8;
    margin-bottom: 24px;
    font-style: italic;
}

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

.author-avatar {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    flex-shrink: 0;
}

.avatar-1 { background: linear-gradient(135deg, #F97316, #EC4899); }
.avatar-2 { background: linear-gradient(135deg, #8B5CF6, #6366F1); }
.avatar-3 { background: linear-gradient(135deg, #0EA5E9, #10B981); }

.author-name {
    font-weight: 700;
    font-size: 0.95rem;
}

.author-role {
    font-size: 0.8rem;
    color: var(--text-tertiary);
}

/* ===== FAQ ===== */
.faq {
    padding: 100px 0;
    background: white;
}

.faq-list {
    max-width: 760px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.faq-item {
    background: var(--bg-soft);
    border-radius: var(--radius-md);
    overflow: hidden;
    border: 1px solid var(--border-light);
    transition: all 0.3s;
}

.faq-item.active {
    background: white;
    box-shadow: var(--shadow-md);
    border-color: var(--purple-light);
}

.faq-question {
    width: 100%;
    padding: 24px 28px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: none;
    border: none;
    cursor: pointer;
    font-family: inherit;
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--text);
    text-align: left;
    transition: color 0.2s;
}

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

.faq-icon {
    font-size: 1.5rem;
    color: var(--purple);
    transition: transform 0.3s;
    flex-shrink: 0;
    margin-left: 16px;
}

.faq-item.active .faq-icon {
    transform: rotate(45deg);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease, padding 0.3s ease;
    padding: 0 28px;
}

.faq-item.active .faq-answer {
    max-height: 300px;
    padding-bottom: 24px;
}

.faq-answer p {
    font-size: 0.95rem;
    color: var(--text-secondary);
    line-height: 1.8;
}

/* ===== CTA 区域 ===== */
.cta-section {
    padding: 100px 0;
    background: white;
}

.cta-box {
    position: relative;
    background: var(--gradient-cta);
    border-radius: var(--radius-xl);
    padding: 80px 40px;
    text-align: center;
    overflow: hidden;
}

.cta-bg-blob {
    position: absolute;
    border-radius: 50%;
    filter: blur(60px);
    opacity: 0.3;
}

.cta-bg-blob.blob-1 {
    width: 400px;
    height: 400px;
    background: var(--purple-light);
    top: -100px;
    left: -100px;
}

.cta-bg-blob.blob-2 {
    width: 300px;
    height: 300px;
    background: var(--blue-light);
    bottom: -80px;
    right: -50px;
}

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

.cta-title {
    font-size: 2.5rem;
    font-weight: 900;
    color: white;
    margin-bottom: 16px;
    letter-spacing: -0.02em;
}

.cta-desc {
    font-size: 1.15rem;
    color: rgba(255, 255, 255, 0.85);
    margin-bottom: 36px;
}

.cta-actions {
    display: flex;
    justify-content: center;
    gap: 16px;
    margin-bottom: 20px;
}

.cta-note {
    font-size: 0.85rem;
    color: rgba(255, 255, 255, 0.6);
}

/* ===== Footer ===== */
.footer {
    background: #1A1A2E;
    color: rgba(255, 255, 255, 0.7);
    padding: 80px 0 32px;
}

.footer-top {
    display: grid;
    grid-template-columns: 2fr 3fr;
    gap: 60px;
    margin-bottom: 60px;
}

.footer-brand .nav-logo {
    margin-bottom: 20px;
}

.footer-brand .logo-text {
    color: white;
    -webkit-text-fill-color: white;
}

.footer-tagline {
    font-size: 0.95rem;
    margin-bottom: 24px;
    max-width: 300px;
    line-height: 1.7;
}

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

.social-link {
    width: 40px;
    height: 40px;
    border-radius: 10px;
    background: rgba(255, 255, 255, 0.08);
    display: flex;
    align-items: center;
    justify-content: center;
    color: rgba(255, 255, 255, 0.7);
    transition: all 0.3s;
}

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

.footer-links {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 40px;
}

.footer-title {
    color: white;
    font-size: 0.95rem;
    font-weight: 700;
    margin-bottom: 20px;
}

.footer-col a {
    display: block;
    font-size: 0.9rem;
    color: rgba(255, 255, 255, 0.6);
    margin-bottom: 12px;
    transition: color 0.2s;
}

.footer-col a:hover {
    color: var(--purple-light);
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 32px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    font-size: 0.85rem;
    color: rgba(255, 255, 255, 0.5);
}

.footer-bottom-links {
    display: flex;
    gap: 12px;
    align-items: center;
}

.footer-bottom-links a:hover {
    color: var(--purple-light);
}

/* ===== AOS 动画 ===== */
[data-aos] {
    opacity: 0;
    transition: opacity 0.6s ease, transform 0.6s ease;
}

[data-aos="fade-up"] {
    transform: translateY(40px);
}

[data-aos="fade-right"] {
    transform: translateX(-40px);
}

[data-aos="fade-left"] {
    transform: translateX(40px);
}

[data-aos].aos-animate {
    opacity: 1;
    transform: translate(0, 0);
}

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
    .hero-title { font-size: 2.8rem; }
    .section-title { font-size: 2rem; }
    
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .pricing-popular {
        transform: scale(1);
    }
    
    .pricing-popular:hover {
        transform: translateY(-4px);
    }
}

@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        top: 70px;
        left: 0;
        right: 0;
        background: white;
        flex-direction: column;
        padding: 24px;
        gap: 16px;
        box-shadow: var(--shadow-lg);
        transform: translateY(-150%);
        transition: transform 0.3s;
    }
    
    .nav-menu.active {
        transform: translateY(0);
    }
    
    .nav-actions {
        display: none;
    }
    
    .nav-toggle {
        display: flex;
    }
    
    .hero {
        padding: 120px 0 80px;
    }
    
    .hero-container {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .hero-title {
        font-size: 2.2rem;
    }
    
    .hero-subtitle {
        font-size: 1rem;
    }
    
    .hero-visual {
        height: 360px;
    }
    
    .card-1 {
        width: 300px;
    }
    
    .hero-stats {
        gap: 20px;
    }
    
    .stat-number {
        font-size: 1.5rem;
    }
    
    .section-title {
        font-size: 1.75rem;
    }
    
    .section-desc {
        font-size: 1rem;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .step-line {
        display: none;
    }
    
    .step-item,
    .step-item:nth-child(even) {
        flex-direction: column;
        gap: 24px;
        text-align: center;
    }
    
    .usecase-panel.active {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .pricing-grid {
        grid-template-columns: 1fr;
    }
    
    .pricing-popular {
        transform: scale(1);
    }
    
    .testimonials-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-top {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .footer-links {
        grid-template-columns: repeat(2, 1fr);
        gap: 32px;
    }
    
    .footer-bottom {
        flex-direction: column;
        gap: 12px;
        text-align: center;
    }
    
    .cta-title {
        font-size: 1.75rem;
    }
    
    .cta-actions {
        flex-direction: column;
    }
    
    .hero-actions {
        flex-direction: column;
    }
    
    .btn-lg {
        width: 100%;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 1.8rem;
    }
    
    .section-title {
        font-size: 1.5rem;
    }
    
    .trust-logos {
        gap: 24px;
    }
    
    .trust-logo {
        font-size: 0.9rem;
    }
    
    .hero-visual {
        height: 300px;
    }
    
    .card-1 {
        width: 260px;
        left: 0;
    }
    
    .card-2, .card-3 {
        right: 0;
    }
}