/* ===== CSS变量 ===== */
:root {
    --primary: #694CF2;
    --primary-light: #936FF6;
    --primary-dark: #5B3DD9;
    --primary-bg: #F3F0FF;
    --text-dark: #1A1A2E;
    --text-gray: #6B7280;
    --text-light: #9CA3AF;
    --bg-white: #FFFFFF;
    --bg-gray: #F8F9FC;
    --bg-dark: #1A1A2E;
    --border: #E5E7EB;
    --border-light: #F0F0F5;
    --success: #10B981;
    --warning: #F59E0B;
    --shadow-sm: 0 0.0625rem 0.1875rem rgba(26,26,46,0.05);
    --shadow: 0 0.25rem 0.75rem rgba(26,26,46,0.08);
    --shadow-lg: 0 0.5rem 1.5rem rgba(26,26,46,0.1);
    --shadow-xl: 0 1rem 3rem rgba(26,26,46,0.12);
    --radius-sm: 0.375rem;
    --radius: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
    --transition: all 0.3s ease;
}

/* ===== 基础重置 ===== */
* {
    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-dark);
    line-height: 1.6;
    background-color: var(--bg-white);
    overflow-x: hidden;
}

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

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

ul {
    list-style: none;
}

/* ===== 通用容器 ===== */
.container {
    max-width: 75rem;
    margin: 0 auto;
    padding: 0 1.5rem;
}

.section {
    padding: 5rem 0;
}

.section-header {
    text-align: center;
    margin-bottom: 4rem;
}

.section-tag {
    display: inline-block;
    padding: 0.375rem 1rem;
    background: var(--primary-bg);
    color: var(--primary);
    border-radius: 100rem;
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: 1.25rem;
}

.section-title {
    font-size: 2.25rem;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 1rem;
    line-height: 1.3;
}

.section-subtitle {
    font-size: 1.125rem;
    color: var(--text-gray);
    max-width: 37.5rem;
    margin: 0 auto;
    line-height: 1.7;
}

.btn {
    display: inline-block;
    padding: 0.75rem 2rem;
    border-radius: var(--radius);
    font-size: 1rem;
    font-weight: 500;
    text-align: center;
    cursor: pointer;
    border: none;
    transition: var(--transition);
}

.btn-primary {
    background: var(--primary);
    color: white;
}

.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-0.125rem);
    box-shadow: var(--shadow-lg);
}

/* ===== 导航栏 ===== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255,255,255,0.95);
    backdrop-filter: blur(0.625rem);
    -webkit-backdrop-filter: blur(0.625rem);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.navbar.scrolled {
    box-shadow: var(--shadow);
}

.nav-container {
    max-width: 75rem;
    margin: 0 auto;
    padding: 0 1.5rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 4.5rem;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.625rem;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary);
}

.logo-img {
    width: 3.125rem;
    height: 3.125rem;
    object-fit: contain;
}

.nav-menu {
    display: flex;
    gap: 2rem;
    align-items: center;
}

.nav-link {
    font-size: 0.9375rem;
    color: var(--text-dark);
    font-weight: 500;
    position: relative;
    transition: var(--transition);
    white-space: nowrap;
}

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

.nav-cta {
    padding: 0.5rem 1.25rem;
    background: var(--primary);
    color: white;
    border-radius: var(--radius);
    font-weight: 500;
    font-size: 0.9375rem;
    transition: var(--transition);
    white-space: nowrap;
}

.nav-cta:hover {
    background: var(--primary-dark);
    transform: translateY(-0.125rem);
}

.hamburger {
    display: none;
    flex-direction: column;
    gap: 0.3125rem;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
}

.hamburger span {
    width: 1.5rem;
    height: 0.1875rem;
    background: var(--text-dark);
    border-radius: 0.125rem;
    transition: var(--transition);
}

.hamburger.active span:nth-child(1) {
    transform: rotate(45deg) translate(0.3125rem, 0.3125rem);
}

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

.hamburger.active span:nth-child(3) {
    transform: rotate(-45deg) translate(0.4375rem, -0.4375rem);
}

/* ===== Hero Banner ===== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    background: linear-gradient(135deg, #5B3DD9 0%, #694CF2 30%, #7B5FF5 60%, #936FF6 100%);
    overflow: hidden;
    padding-top: 4.5rem;
}

.hero-bg-shapes {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    pointer-events: none;
}

.hero-shape {
    position: absolute;
    border-radius: 50%;
    background: rgba(255,255,255,0.08);
    animation: float 6s ease-in-out infinite;
}

.hero-shape-1 {
    width: 25rem;
    height: 25rem;
    top: -5rem;
    right: -5rem;
    animation-delay: 0s;
}

.hero-shape-2 {
    width: 15rem;
    height: 15rem;
    bottom: 10%;
    left: -3rem;
    animation-delay: 1.5s;
}

.hero-shape-3 {
    width: 10rem;
    height: 10rem;
    top: 40%;
    right: 30%;
    animation-delay: 3s;
}

.hero-shape-4 {
    width: 6rem;
    height: 6rem;
    bottom: 30%;
    right: 15%;
    animation-delay: 4.5s;
}

@keyframes float {
    0%, 100% { transform: translateY(0) rotate(0deg); }
    50% { transform: translateY(-1.25rem) rotate(5deg); }
}

.hero-content {
    position: relative;
    z-index: 2;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
    padding: 5rem 1.5rem;
    color: white;
}

.hero-left {
    max-width: 34rem;
}

.hero-title {
    font-size: 3rem;
    font-weight: 800;
    margin-bottom: 1.5rem;
    line-height: 1.2;
    letter-spacing: -0.02em;
}

.hero-subtitle {
    font-size: 1.125rem;
    margin-bottom: 2rem;
    opacity: 0.95;
    line-height: 1.7;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
}

.hero-btn-primary {
    background: white;
    color: var(--primary);
    padding: 0.875rem 2.25rem;
    border-radius: var(--radius);
    font-weight: 600;
    font-size: 1rem;
    transition: var(--transition);
    display: inline-block;
}

.hero-btn-primary:hover {
    transform: translateY(-0.125rem);
    box-shadow: 0 0.5rem 1.5625rem rgba(0,0,0,0.2);
}

.hero-btn-secondary {
    background: rgba(255,255,255,0.15);
    color: white;
    padding: 0.875rem 2.25rem;
    border-radius: var(--radius);
    font-weight: 600;
    font-size: 1rem;
    border: 0.125rem solid rgba(255,255,255,0.4);
    transition: var(--transition);
    display: inline-block;
}

.hero-btn-secondary:hover {
    background: rgba(255,255,255,0.25);
    border-color: white;
    transform: translateY(-0.125rem);
}

.hero-note {
    font-size: 0.875rem;
    opacity: 0.8;
}

/* Hero Mockup */
.hero-right {
    display: flex;
    justify-content: center;
}

.hero-carousel {
    width: 100%;
    max-width: 28rem;
    position: relative;
    border-radius: var(--radius-2xl);
    overflow: hidden;
    box-shadow: 0 1.5rem 4rem rgba(0,0,0,0.25);
}

.carousel-track {
    display: flex;
    width: 100%;
    transition: transform 0.6s ease-in-out;
    will-change: transform;
}

.carousel-slide {
    flex-shrink: 0;
    width: 100%;
}

.carousel-slide img {
    width: 100%;
    height: auto;
    display: block;
}

.carousel-dots {
    position: absolute;
    bottom: 1rem;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 0.5rem;
    z-index: 2;
}

.carousel-dot {
    width: 0.5rem;
    height: 0.5rem;
    border-radius: 50%;
    background: rgba(0,0,0,0.4);
    border: none;
    cursor: pointer;
    transition: all 0.3s ease;
    padding: 0;
}

.carousel-dot.active {
    background: #000;
    width: 1.25rem;
    border-radius: 0.25rem;
}

.carousel-dot:hover {
    background: rgba(0,0,0,0.7);
}

.carousel-btn {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 2.5rem;
    height: 2.5rem;
    border-radius: 50%;
    background: rgba(255,255,255,0.9);
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #333;
    z-index: 3;
    transition: all 0.3s ease;
    box-shadow: 0 0.25rem 0.75rem rgba(0,0,0,0.15);
}

.carousel-btn:hover {
    background: white;
    color: #000;
    box-shadow: 0 0.375rem 1rem rgba(0,0,0,0.25);
}

.carousel-btn-prev {
    left: 0.75rem;
}

.carousel-btn-next {
    right: 0.75rem;
}

.hero-scroll {
    position: absolute;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    color: white;
    font-size: 0.875rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.375rem;
    opacity: 0.7;
    animation: bounce 2s infinite;
}

@keyframes bounce {
    0%, 100% { transform: translateX(-50%) translateY(0); }
    50% { transform: translateX(-50%) translateY(-0.5rem); }
}

/* ===== 数据统计条 ===== */
.stats-bar {
    background: var(--bg-white);
    padding: 3rem 0;
    border-bottom: 0.0625rem solid var(--border-light);
}

.stats-row {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 2rem;
    text-align: center;
}

.stats-item {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.stats-number {
    font-size: 2.75rem;
    font-weight: 800;
    color: var(--primary);
    line-height: 1.1;
    margin-bottom: 0.375rem;
}

.stats-label {
    font-size: 0.9375rem;
    color: var(--text-gray);
    font-weight: 500;
}

/* ===== 核心功能 ===== */
.features {
    background: var(--bg-white);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
}

.feature-card {
    background: var(--bg-white);
    border: 0.0625rem solid var(--border-light);
    border-radius: var(--radius-xl);
    padding: 2rem 1.75rem;
    transition: var(--transition);
    position: relative;
}

.feature-card:hover {
    border-color: var(--primary-light);
    box-shadow: var(--shadow-lg);
    transform: translateY(-0.25rem);
}

.feature-icon {
    width: 3.5rem;
    height: 3.5rem;
    background: linear-gradient(135deg, var(--primary-bg), #EEE8FF);
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.25rem;
    color: var(--primary);
}

.feature-icon svg {
    width: 1.75rem;
    height: 1.75rem;
}

.feature-title {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 0.75rem;
    color: var(--text-dark);
}

.feature-desc {
    color: var(--text-gray);
    font-size: 0.9375rem;
    line-height: 1.7;
    margin-bottom: 1rem;
}

.feature-link {
    color: var(--primary);
    font-weight: 600;
    font-size: 0.875rem;
    transition: var(--transition);
}

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

/* ===== 产品演示 ===== */
.product-demo {
    background: var(--bg-gray);
}

.demo-group {
    margin-bottom: 3rem;
}

.demo-group:last-child {
    margin-bottom: 0;
}

.demo-group-label {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.375rem 1rem;
    background: var(--primary-bg);
    color: var(--primary);
    border-radius: 999px;
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: 1.25rem;
}

.demo-group-icon {
    font-size: 1rem;
}

.demo-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
}

.demo-screenshot {
    overflow: hidden;
    background: #f8f9fc;
}

.demo-screenshot img {
    width: 100%;
    height: auto;
    display: block;
}

.demo-card {
    background: var(--bg-white);
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.demo-card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-0.25rem);
}

.demo-mockup {
    background: white;
    border-bottom: 0.0625rem solid var(--border-light);
    min-height: 16rem;
}

.demo-mockup-header {
    padding: 0.75rem 1.25rem;
    background: #F8F9FC;
    border-bottom: 0.0625rem solid var(--border-light);
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-dark);
}

.demo-mockup-body {
    padding: 1.25rem;
}

/* Report Mockup */
.report-row {
    display: flex;
    align-items: center;
    gap: 0.625rem;
    padding: 0.625rem 0;
    border-bottom: 0.0625rem solid var(--border-light);
}

.report-row:last-of-type {
    border-bottom: none;
}

.report-check {
    width: 1.5rem;
    height: 1.5rem;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.75rem;
    color: white;
    flex-shrink: 0;
}

.report-check.success {
    background: var(--success);
}

.report-check.pending {
    background: var(--warning);
}

.report-text {
    flex: 1;
    min-width: 0;
}

.report-title {
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--text-dark);
}

.report-desc {
    font-size: 0.6875rem;
    color: var(--text-gray);
}

.report-tag {
    font-size: 0.6875rem;
    font-weight: 600;
    padding: 0.125rem 0.5rem;
    border-radius: 100rem;
    flex-shrink: 0;
}

.report-tag.success {
    background: #D1FAE5;
    color: var(--success);
}

.report-tag.pending {
    background: #FEF3C7;
    color: var(--warning);
}

.report-progress {
    margin-top: 1rem;
    text-align: center;
}

.progress-bar {
    height: 0.5rem;
    background: var(--border-light);
    border-radius: 100rem;
    overflow: hidden;
    margin-bottom: 0.375rem;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--primary), var(--primary-light));
    border-radius: 100rem;
}

.report-progress span {
    font-size: 0.75rem;
    color: var(--text-gray);
}

/* Match Mockup */
.match-user {
    display: flex;
    align-items: center;
    gap: 0.625rem;
    padding: 0.625rem;
    background: var(--bg-gray);
    border-radius: var(--radius);
    margin-bottom: 0.75rem;
}

.match-avatar {
    width: 2.25rem;
    height: 2.25rem;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    flex-shrink: 0;
}

.match-avatar-1 {
    background: linear-gradient(135deg, #A18CD1, #FBC2EB);
}

.match-info {
    flex: 1;
}

.match-name {
    font-weight: 600;
    font-size: 0.875rem;
    color: var(--text-dark);
}

.match-meta {
    font-size: 0.6875rem;
    color: var(--text-gray);
}

.match-score {
    text-align: center;
}

.score-num {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--primary);
    line-height: 1;
}

.score-unit {
    font-size: 0.75rem;
    color: var(--primary);
    font-weight: 600;
}

.match-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.375rem;
    margin-bottom: 0.75rem;
}

.match-tag {
    padding: 0.1875rem 0.625rem;
    background: var(--primary-bg);
    color: var(--primary);
    border-radius: 100rem;
    font-size: 0.6875rem;
    font-weight: 500;
}

.match-details {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.match-row {
    display: grid;
    grid-template-columns: 4rem 1fr 2.5rem;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.75rem;
    color: var(--text-gray);
}

.match-bar {
    height: 0.375rem;
    background: var(--border-light);
    border-radius: 100rem;
    overflow: hidden;
}

.match-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--primary), var(--primary-light));
    border-radius: 100rem;
}

.match-percent {
    text-align: right;
    color: var(--primary);
    font-weight: 600;
}

/* Stats Mockup */
.stats-chart {
    margin-bottom: 1rem;
}

.chart-title {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 0.75rem;
}

.chart-bars {
    display: flex;
    align-items: flex-end;
    gap: 0.375rem;
    height: 6rem;
}

.chart-bar {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.375rem;
    height: 100%;
}

.chart-bar-fill {
    width: 100%;
    background: linear-gradient(180deg, var(--primary-light), var(--primary));
    border-radius: var(--radius-sm) var(--radius-sm) 0 0;
    flex: 1;
}

.chart-bar span {
    font-size: 0.625rem;
    color: var(--text-gray);
}

.kpi-row {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 0.5rem;
    padding-top: 0.75rem;
    border-top: 0.0625rem solid var(--border-light);
}

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

.kpi-num {
    font-size: 1rem;
    font-weight: 700;
    color: var(--primary);
}

.kpi-label {
    font-size: 0.625rem;
    color: var(--text-gray);
}

.demo-title {
    font-size: 1.125rem;
    font-weight: 700;
    padding: 1.25rem 1.25rem 0.375rem;
    color: var(--text-dark);
}

.demo-desc {
    font-size: 0.875rem;
    color: var(--text-gray);
    padding: 0 1.25rem 1.25rem;
    line-height: 1.6;
}

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

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

.testimonials-logos {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 1.5rem;
    margin-bottom: 3rem;
    padding: 1.5rem;
    background: var(--bg-gray);
    border-radius: var(--radius-xl);
}

.logo-item {
    padding: 0.5rem 1.25rem;
    background: white;
    border-radius: var(--radius);
    font-weight: 600;
    color: var(--text-gray);
    font-size: 0.875rem;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.logo-item:hover {
    color: var(--primary);
    box-shadow: var(--shadow);
}

.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
}

.testimonial-card {
    background: var(--bg-white);
    border: 0.0625rem solid var(--border-light);
    border-radius: var(--radius-xl);
    padding: 2rem;
    transition: var(--transition);
}

.testimonial-card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-0.25rem);
}

.testimonial-stars {
    color: #FBBF24;
    font-size: 1rem;
    margin-bottom: 1rem;
    letter-spacing: 0.125rem;
}

.testimonial-text {
    font-size: 0.9375rem;
    color: var(--text-dark);
    line-height: 1.7;
    margin-bottom: 1.5rem;
    font-style: italic;
}

.testimonial-author {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.author-avatar {
    width: 2.5rem;
    height: 2.5rem;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary-light), var(--primary));
    flex-shrink: 0;
}

.author-name {
    font-weight: 600;
    font-size: 0.875rem;
    color: var(--text-dark);
}

.author-title {
    font-size: 0.75rem;
    color: var(--text-gray);
}

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

.pricing-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
    align-items: start;
}

.pricing-card {
    background: var(--bg-white);
    border: 0.0625rem solid var(--border-light);
    border-radius: var(--radius-xl);
    padding: 2.5rem 2rem;
    position: relative;
    transition: var(--transition);
}

.pricing-card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-0.25rem);
}

.pricing-card-featured {
    border: 0.125rem solid var(--primary);
    box-shadow: var(--shadow-lg);
    transform: scale(1.03);
}

.pricing-card-featured:hover {
    transform: scale(1.03) translateY(-0.25rem);
}

.pricing-badge {
    position: absolute;
    top: -0.75rem;
    left: 50%;
    transform: translateX(-50%);
    background: var(--primary);
    color: white;
    padding: 0.25rem 1rem;
    border-radius: 100rem;
    font-size: 0.75rem;
    font-weight: 600;
    white-space: nowrap;
}

.pricing-header {
    text-align: center;
    margin-bottom: 1.5rem;
}

.pricing-name {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 0.5rem;
}

.pricing-desc {
    font-size: 0.875rem;
    color: var(--text-gray);
}

.pricing-price {
    text-align: center;
    margin-bottom: 1.5rem;
    padding-bottom: 1.5rem;
    border-bottom: 0.0625rem solid var(--border-light);
}

.price-currency {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-dark);
    vertical-align: top;
}

.price-amount {
    font-size: 3rem;
    font-weight: 800;
    color: var(--text-dark);
    line-height: 1;
}

.price-unit {
    font-size: 0.875rem;
    color: var(--text-gray);
}

.pricing-features {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    margin-bottom: 2rem;
}

.pricing-features li {
    font-size: 0.875rem;
    color: var(--text-dark);
    padding-left: 0.25rem;
}

.pricing-btn {
    display: block;
    width: 100%;
    padding: 0.75rem;
    text-align: center;
    border: 0.125rem solid var(--primary);
    color: var(--primary);
    border-radius: var(--radius);
    font-weight: 600;
    font-size: 0.9375rem;
    transition: var(--transition);
}

.pricing-btn:hover {
    background: var(--primary-bg);
}

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

.pricing-btn-primary:hover {
    background: var(--primary-dark);
}

/* ===== CTA 区域 ===== */
.cta-section {
    background: linear-gradient(135deg, #5B3DD9 0%, #694CF2 50%, #936FF6 100%);
    text-align: center;
    color: white;
    position: relative;
    overflow: hidden;
    padding-bottom: 2rem;
}

.cta-section::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 37.5rem;
    height: 37.5rem;
    background: rgba(255,255,255,0.05);
    border-radius: 50%;
}

.cta-section h2 {
    font-size: 2.25rem;
    font-weight: 700;
    margin-bottom: 1rem;
    position: relative;
    z-index: 1;
}

.cta-section p {
    font-size: 1.125rem;
    opacity: 0.95;
    margin-bottom: 2rem;
    position: relative;
    z-index: 1;
}

.cta-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
    position: relative;
    z-index: 1;
}

.cta-btn-primary {
    padding: 0.875rem 2.25rem;
    background: white;
    color: var(--primary);
    border-radius: var(--radius);
    font-weight: 600;
    font-size: 1rem;
    transition: var(--transition);
    display: inline-block;
}

.cta-btn-primary:hover {
    transform: translateY(-0.125rem);
    box-shadow: 0 0.5rem 1.5625rem rgba(0,0,0,0.2);
}

.cta-btn-secondary {
    padding: 0.875rem 2.25rem;
    background: rgba(255,255,255,0.15);
    color: white;
    border-radius: var(--radius);
    font-weight: 600;
    font-size: 1rem;
    border: 0.125rem solid rgba(255,255,255,0.5);
    transition: var(--transition);
    display: inline-block;
}

.cta-btn-secondary:hover {
    background: rgba(255,255,255,0.25);
    border-color: white;
}

/* ===== 扫码关注 ===== */
.qr-section {
    background: var(--bg-gray);
    padding: 5rem 0;
}

.qr-section-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.qr-text .section-tag {
    margin-bottom: 1.25rem;
}

.qr-text h2 {
    font-size: 2.25rem;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 1rem;
    line-height: 1.3;
}

.qr-text p {
    font-size: 1.125rem;
    color: var(--text-gray);
    line-height: 1.7;
    margin-bottom: 1.5rem;
}

.qr-features {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.qr-features li {
    font-size: 1rem;
    color: var(--text-dark);
    padding-left: 0.25rem;
}

.qr-codes {
    display: flex;
    justify-content: center;
    gap: 2rem;
}

.qr-code-item {
    text-align: center;
}

.qr-code-box {
    width: 10rem;
    height: 10rem;
    background: white;
    border-radius: var(--radius-xl);
    padding: 0.75rem;
    box-shadow: var(--shadow-lg);
    border: 0.0625rem solid var(--border-light);
    transition: var(--transition);
}

.qr-code-box:hover {
    transform: translateY(-0.25rem);
    box-shadow: 0 1rem 2.5rem rgba(26,26,46,0.15);
}

.qr-code-box img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    border-radius: var(--radius);
}

.qr-code-label {
    margin-top: 0.75rem;
    font-size: 0.875rem;
    color: var(--text-dark);
    font-weight: 600;
}

/* ===== 页脚 ===== */
.footer {
    background: var(--bg-dark);
    color: #9CA3AF;
    padding: 4rem 0 0;
}

.footer-grid {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr 1fr 1fr;
    gap: 3rem;
    padding-bottom: 2rem;
    /* margin-bottom: 3rem; */
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 0.625rem;
}

.footer-logo-img {
    width: 6rem;
    height: 6rem;
    object-fit: contain;
}

.footer-logo span {
    font-size: 1.5rem;
    font-weight: 700;
    color: white;
}

.footer-brand p {
    font-size: 0.875rem;
    line-height: 1.7;
    margin-bottom: 1.5rem;
    color: #9CA3AF;
}

.footer-qr {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 1.5rem;
}

.footer-qr img {
    width: 3.5rem;
    height: 3.5rem;
    border-radius: var(--radius-sm);
    background: white;
    padding: 0.25rem;
    object-fit: contain;
}

.footer-qr span {
    font-size: 0.8125rem;
    color: var(--primary-light);
    font-weight: 500;
}

.footer-social {
    display: flex;
    gap: 0.75rem;
}

.social-icon {
    width: 2.25rem;
    height: 2.25rem;
    background: rgba(255,255,255,0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    transition: var(--transition);
}

.social-icon:hover {
    background: var(--primary);
    transform: translateY(-0.125rem);
}

.footer-col h4 {
    color: white;
    font-size: 0.9375rem;
    margin-bottom: 1.25rem;
    font-weight: 600;
}

.footer-col ul li {
    margin-bottom: 0.625rem;
    font-size: 0.875rem;
    color: #9CA3AF;
}

.footer-col ul li a {
    color: #9CA3AF;
    transition: var(--transition);
    font-size: 0.875rem;
}

.footer-col ul li a:hover {
    color: var(--primary-light);
    padding-left: 0.25rem;
}

.footer-bottom {
    border-top: 0.0625rem solid rgba(255,255,255,0.1);
    padding: 1.5rem 0;
    text-align: center;
    font-size: 0.8125rem;
    color: #6B7280;
}

.footer-bottom a {
    color: #6B7280;
    transition: var(--transition);
}

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

/* ===== 响应式设计 ===== */

/* 1366px 小笔记本 */
@media (max-width: 1366px) {
    .hero-title {
        font-size: 2.5rem;
    }

    .container {
        max-width: 70rem;
    }
}

/* 1024px 大平板 */
@media (max-width: 1024px) {
    .container {
        max-width: 60rem;
    }

    .section {
        padding: 4rem 0;
    }

    .hero-content {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 3rem;
    }

    .hero-left {
        max-width: 100%;
    }

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

    .stats-row {
        grid-template-columns: repeat(3, 1fr);
        gap: 1.5rem;
    }

    .stats-item:nth-child(4),
    .stats-item:nth-child(5) {
        grid-column: span 1;
    }

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

    .pricing-grid {
        grid-template-columns: 1fr;
        max-width: 28rem;
        margin: 0 auto;
    }

    .pricing-card-featured {
        transform: none;
    }

    .pricing-card-featured:hover {
        transform: translateY(-0.25rem);
    }

    .footer-grid {
        grid-template-columns: 1fr 1fr;
        gap: 2rem;
    }

    .qr-section-content {
        grid-template-columns: 1fr;
        gap: 3rem;
        text-align: center;
    }

    .qr-features {
        align-items: center;
    }
}

/* 768px 小平板/大屏手机 */
@media (max-width: 768px) {
    .container {
        padding: 0 1.25rem;
    }

    .section {
        padding: 3rem 0;
    }

    .section-title {
        font-size: 1.75rem;
    }

    .hamburger {
        display: flex;
        z-index: 1001;
    }

    .nav-menu {
        position: fixed;
        top: 0;
        right: -100%;
        width: 80%;
        max-width: 320px;
        height: 100vh;
        background: white;
        flex-direction: column;
        justify-content: center;
        gap: 1.5rem;
        box-shadow: -0.25rem 0 1.25rem rgba(0,0,0,0.1);
        transition: right 0.3s ease;
    }

    .nav-menu.active {
        right: 0;
    }

    .nav-link {
        font-size: 1.25rem;
    }

    .hero-title {
        font-size: 2rem;
    }

    .hero-subtitle {
        font-size: 1rem;
    }

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

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

    .footer-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
        text-align: center;
    }

    .footer-logo {
        justify-content: center;
    }

    .footer-social {
        justify-content: center;
    }

    .qr-section {
        padding: 3.5rem 0;
    }

    .qr-code-box {
        width: 8rem;
        height: 8rem;
    }

    .qr-text h2 {
        font-size: 1.75rem;
    }

    .footer-qr {
        justify-content: center;
    }
}

/* 480px 手机 */
@media (max-width: 480px) {
    .container {
        padding: 0 1rem;
    }

    .section {
        padding: 2.5rem 0;
    }

    .section-title {
        font-size: 1.5rem;
    }

    .hero-title {
        font-size: 1.75rem;
    }

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

    .hero-btn-primary,
    .hero-btn-secondary {
        width: 100%;
        max-width: 17.5rem;
        text-align: center;
    }

    .stats-row {
        grid-template-columns: repeat(2, 1fr);
        gap: 1.25rem;
    }

    .stats-number {
        font-size: 2rem;
    }

    .cta-section h2 {
        font-size: 1.5rem;
    }

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

    .qr-code-box {
        width: 7rem;
        height: 7rem;
    }

    .qr-codes {
        gap: 1.5rem;
    }

    .qr-code-label {
        font-size: 0.75rem;
    }
}

/* 大屏优化（>1920px） */
@media (min-width: 1920px) {
    .container {
        max-width: 90rem;
    }

    .section-title {
        font-size: 2.75rem;
    }

    .hero-title {
        font-size: 4rem;
    }

    .section {
        padding: 6rem 0;
    }

    .qr-code-box {
        width: 12rem;
        height: 12rem;
    }

    .qr-text h2 {
        font-size: 2.75rem;
    }
}

/* 减少动画偏好设置 */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        transition-duration: 0.01ms !important;
    }
}