/* ========================================
   毂腾云｜网约车租赁管理系统 - 企业官网
   杭州毂腾科技有限公司
   ======================================== */

/* CSS Variables */
:root {
    --primary: #2563eb;
    --primary-dark: #1d4ed8;
    --primary-light: #3b82f6;
    --secondary: #6366f1;
    --accent: #06b6d4;
    --dark: #0f172a;
    --dark-2: #1e293b;
    --dark-3: #334155;
    --gray: #64748b;
    --gray-light: #94a3b8;
    --light: #f1f5f9;
    --white: #ffffff;
    --gradient-1: linear-gradient(135deg, #0f172a 0%, #1e293b 40%, #1e3a5f 70%, #0f172a 100%);
    --gradient-2: linear-gradient(135deg, #2563eb 0%, #6366f1 50%, #06b6d4 100%);
    --gradient-3: linear-gradient(135deg, #1e293b 0%, #0f172a 100%);
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.12);
    --shadow-md: 0 4px 16px rgba(0,0,0,0.12);
    --shadow-lg: 0 10px 40px rgba(0,0,0,0.16);
    --shadow-xl: 0 20px 60px rgba(0,0,0,0.2);
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Reset & Base */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px;
}

body {
    font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    font-size: 16px;
    line-height: 1.6;
    color: var(--dark-2);
    background: var(--white);
    overflow-x: hidden;
}

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

ul {
    list-style: none;
}

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

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* ========== Buttons ========== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 28px;
    border-radius: 50px;
    font-weight: 500;
    font-size: 15px;
    cursor: pointer;
    transition: var(--transition);
    border: 2px solid transparent;
    white-space: nowrap;
}

.btn-primary {
    background: var(--gradient-2);
    color: var(--white);
    border: none;
    box-shadow: 0 4px 15px rgba(37, 99, 235, 0.35);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(37, 99, 235, 0.5);
}

.btn-outline {
    background: transparent;
    color: var(--white);
    border-color: rgba(255,255,255,0.4);
}

.btn-outline:hover {
    background: rgba(255,255,255,0.1);
    border-color: var(--white);
}

.btn-white {
    background: var(--white);
    color: var(--primary);
    border: none;
    box-shadow: var(--shadow-md);
}

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

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

.btn-outline-white:hover {
    background: rgba(255,255,255,0.15);
    border-color: var(--white);
}

.btn-sm {
    padding: 8px 20px;
    font-size: 14px;
}

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

.btn-block {
    width: 100%;
}

/* ========== Header ========== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    padding: 16px 0;
    transition: var(--transition);
    background: transparent;
}

.header.scrolled {
    background: rgba(15, 23, 42, 0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    padding: 10px 0;
    box-shadow: 0 4px 20px rgba(0,0,0,0.2);
}

.header .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo a {
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--white);
    font-size: 24px;
    font-weight: 700;
}

.logo-icon {
    width: 42px;
    height: 42px;
    background: var(--gradient-2);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    color: var(--white);
}

.logo-img {
    height: 40px;
    width: 40px;
    object-fit: contain;
}

.logo-text {
    letter-spacing: 2px;
}

.nav-list {
    display: flex;
    gap: 4px;
}

.nav-link {
    padding: 8px 18px;
    color: rgba(255,255,255,0.75);
    font-size: 15px;
    border-radius: 50px;
    transition: var(--transition);
    position: relative;
}

.nav-link:hover,
.nav-link.active {
    color: var(--white);
    background: rgba(255,255,255,0.1);
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 12px;
}

/* Menu Toggle */
.menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
    z-index: 1001;
}

.menu-toggle span {
    display: block;
    width: 26px;
    height: 2px;
    background: var(--white);
    transition: var(--transition);
    border-radius: 2px;
}

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

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

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

/* ========== Hero Section ========== */
.hero {
    position: relative;
    height: 100vh;
    min-height: 700px;
    overflow: hidden;
    display: flex;
    align-items: center;
}

.hero-slider {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

.slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    transition: opacity 1s ease-in-out;
}

.slide.active {
    opacity: 1;
    z-index: 1;
}

.slide-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

.slide-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(ellipse at 30% 50%, rgba(37, 99, 235, 0.15) 0%, transparent 60%),
                radial-gradient(ellipse at 70% 30%, rgba(99, 102, 241, 0.1) 0%, transparent 50%);
}

.slide-content {
    position: relative;
    z-index: 2;
    height: 100%;
    display: flex;
    align-items: center;
    padding-top: 80px;
}

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

.hero-title {
    font-size: 48px;
    font-weight: 900;
    line-height: 1.2;
    color: var(--white);
    margin-bottom: 20px;
}

.text-highlight {
    background: var(--gradient-2);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 18px;
    color: rgba(255,255,255,0.7);
    line-height: 1.8;
    margin-bottom: 36px;
    max-width: 520px;
}

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

/* Hero Dashboard */
.hero-dashboard {
    background: rgba(255,255,255,0.06);
    border: 1px solid rgba(255,255,255,0.1);
    border-radius: var(--radius-lg);
    backdrop-filter: blur(10px);
    overflow: hidden;
    box-shadow: var(--shadow-xl);
}

.dashboard-header {
    padding: 14px 20px;
    background: rgba(0,0,0,0.3);
    display: flex;
    align-items: center;
    gap: 12px;
    border-bottom: 1px solid rgba(255,255,255,0.05);
}

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

.dashboard-dots span {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: rgba(255,255,255,0.3);
}

.dashboard-dots span:nth-child(1) { background: #ff5f57; }
.dashboard-dots span:nth-child(2) { background: #febc2e; }
.dashboard-dots span:nth-child(3) { background: #28c840; }

.dashboard-title {
    color: rgba(255,255,255,0.6);
    font-size: 13px;
}

.dashboard-body {
    padding: 24px;
}

.dashboard-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 14px;
    margin-bottom: 24px;
}

.stat-card {
    background: rgba(255,255,255,0.05);
    border-radius: var(--radius-sm);
    padding: 14px;
    display: flex;
    align-items: center;
    gap: 12px;
    border: 1px solid rgba(255,255,255,0.06);
}

.stat-icon {
    width: 40px;
    height: 40px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
}

.stat-icon.blue { background: rgba(37,99,235,0.2); color: #60a5fa; }
.stat-icon.green { background: rgba(34,197,94,0.2); color: #4ade80; }
.stat-icon.orange { background: rgba(251,146,60,0.2); color: #fb923c; }
.stat-icon.red { background: rgba(239,68,68,0.2); color: #f87171; }

.stat-value {
    font-size: 20px;
    font-weight: 700;
    color: var(--white);
}

.stat-unit {
    font-size: 14px;
    font-weight: 400;
}

.stat-label {
    font-size: 12px;
    color: rgba(255,255,255,0.5);
}

/* Chart */
.dashboard-chart {
    background: rgba(255,255,255,0.03);
    border-radius: var(--radius-sm);
    padding: 16px 20px 12px;
}

.chart-bars {
    display: flex;
    align-items: flex-end;
    gap: 10px;
    height: 100px;
    margin-bottom: 10px;
}

.chart-bar {
    flex: 1;
    background: var(--gradient-2);
    border-radius: 4px 4px 0 0;
    opacity: 0.7;
    transition: var(--transition);
    min-width: 8px;
}

.chart-bar:hover {
    opacity: 1;
}

.chart-labels {
    display: flex;
    justify-content: space-between;
    font-size: 11px;
    color: rgba(255,255,255,0.4);
}

/* Slide Indicators */
.slide-indicators {
    position: absolute;
    bottom: 100px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 10px;
    z-index: 3;
}

.indicator {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: rgba(255,255,255,0.3);
    cursor: pointer;
    transition: var(--transition);
}

.indicator.active {
    background: var(--white);
    width: 30px;
    border-radius: 5px;
}

/* Scroll Hint */
.scroll-hint {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    z-index: 3;
    color: rgba(255,255,255,0.5);
    font-size: 13px;
    animation: bounce 2s infinite;
}

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

/* ========== Section Common ========== */
section {
    padding: 100px 0;
}

.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-header.left {
    text-align: left;
    margin-bottom: 30px;
}

.section-title {
    font-size: 36px;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 16px;
    line-height: 1.3;
}

.section-subtitle {
    font-size: 17px;
    color: var(--gray);
    max-width: 650px;
    margin: 0 auto;
    line-height: 1.7;
}

.section-header.left .section-subtitle {
    margin: 0;
}

/* ========== Features Section ========== */
.features {
    background: var(--white);
    position: relative;
}

.features::before {
    content: '';
    position: absolute;
    top: -50px;
    left: 0;
    right: 0;
    height: 100px;
    background: var(--white);
    border-radius: 50% 50% 0 0;
}

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

.feature-card {
    background: var(--white);
    border: 1px solid #e2e8f0;
    border-radius: var(--radius-lg);
    padding: 36px 28px;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 3px;
    background: var(--gradient-2);
    transform: scaleX(0);
    transition: transform 0.4s ease;
}

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

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

.feature-icon {
    width: 60px;
    height: 60px;
    border-radius: var(--radius-md);
    background: rgba(37, 99, 235, 0.08);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 26px;
    color: var(--primary);
    margin-bottom: 20px;
    transition: var(--transition);
}

.feature-card:hover .feature-icon {
    background: var(--gradient-2);
    color: var(--white);
    transform: scale(1.1);
}

.feature-title {
    font-size: 20px;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 10px;
}

.feature-desc {
    font-size: 14px;
    color: var(--gray);
    line-height: 1.7;
    margin-bottom: 16px;
}

.feature-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.feature-tags li {
    font-size: 12px;
    padding: 4px 12px;
    background: var(--light);
    color: var(--gray);
    border-radius: 50px;
    transition: var(--transition);
}

.feature-card:hover .feature-tags li {
    background: rgba(37, 99, 235, 0.08);
    color: var(--primary);
}

/* ========== Value Prop ========== */
.value-prop {
    background: var(--gradient-2);
    padding: 60px 0;
}

.value-grid {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 40px;
    flex-wrap: wrap;
}

.value-item {
    text-align: center;
    color: var(--white);
}

.value-number {
    font-size: 42px;
    font-weight: 900;
    line-height: 1;
    margin-bottom: 6px;
}

.value-number span {
    font-size: 18px;
    font-weight: 400;
    opacity: 0.8;
}

.value-label {
    font-size: 15px;
    opacity: 0.85;
}

.value-divider {
    width: 1px;
    height: 50px;
    background: rgba(255,255,255,0.25);
}

/* ========== About Section ========== */
.about {
    background: var(--white);
}

.about-grid {
    display: grid;
    grid-template-columns: 1.1fr 0.9fr;
    gap: 60px;
    align-items: center;
}

.about-text {
    font-size: 15px;
    color: var(--gray);
    line-height: 1.8;
    margin-bottom: 16px;
}

.about-stats {
    display: flex;
    gap: 40px;
    margin-top: 32px;
}

.about-stat {
    display: flex;
    flex-direction: column;
}

.about-stat-num {
    font-size: 32px;
    font-weight: 900;
    background: var(--gradient-2);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.about-stat-label {
    font-size: 14px;
    color: var(--gray-light);
    margin-top: 4px;
}

/* About Card */
.about-card {
    background: var(--white);
    border: 1px solid #e2e8f0;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
}

.about-card-header {
    background: var(--dark);
    color: var(--white);
    padding: 16px 24px;
    font-weight: 600;
    font-size: 15px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.about-card-body {
    padding: 24px;
}

.about-card-row {
    display: flex;
    justify-content: space-between;
    padding: 14px 0;
    border-bottom: 1px solid var(--light);
    font-size: 14px;
}

.about-card-row:last-child {
    border-bottom: none;
}

.about-card-row .label {
    color: var(--gray-light);
    font-weight: 500;
}

.about-card-row .value {
    color: var(--dark);
    font-weight: 500;
}

/* ========== Advantages Section ========== */
.advantages {
    background: var(--light);
}

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

.advantage-card {
    background: var(--white);
    border-radius: var(--radius-lg);
    padding: 40px 30px;
    text-align: center;
    transition: var(--transition);
    box-shadow: var(--shadow-sm);
}

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

.advantage-icon {
    width: 70px;
    height: 70px;
    border-radius: 50%;
    background: rgba(37, 99, 235, 0.08);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 30px;
    color: var(--primary);
    margin: 0 auto 24px;
    transition: var(--transition);
}

.advantage-card:hover .advantage-icon {
    background: var(--gradient-2);
    color: var(--white);
    transform: scale(1.1);
}

.advantage-card h3 {
    font-size: 20px;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 14px;
}

.advantage-card p {
    font-size: 14px;
    color: var(--gray);
    line-height: 1.8;
}

/* ========== Digital Transform ========== */
.digital-transform {
    background: var(--white);
}

.transform-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 24px;
}

.transform-item {
    text-align: center;
    padding: 30px 20px;
    border-radius: var(--radius-md);
    transition: var(--transition);
    border: 1px solid transparent;
}

.transform-item:hover {
    background: var(--light);
    border-color: #e2e8f0;
}

.transform-icon {
    width: 56px;
    height: 56px;
    border-radius: var(--radius-md);
    background: rgba(37, 99, 235, 0.08);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    color: var(--primary);
    margin: 0 auto 16px;
}

.transform-item h4 {
    font-size: 16px;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 10px;
}

.transform-item p {
    font-size: 13px;
    color: var(--gray);
    line-height: 1.7;
}

/* ========== Pricing ========== */
.pricing {
    background: var(--light);
}

.pricing-card-wrapper {
    max-width: 450px;
    margin: 0 auto;
}

.pricing-card {
    background: var(--white);
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    position: relative;
    border: 2px solid var(--primary);
    transition: var(--transition);
}

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

.pricing-badge {
    position: absolute;
    top: 16px;
    right: -30px;
    background: var(--gradient-2);
    color: var(--white);
    font-size: 13px;
    font-weight: 600;
    padding: 6px 40px;
    transform: rotate(45deg);
}

.pricing-header {
    padding: 40px 32px 20px;
    text-align: center;
    background: var(--dark);
    color: var(--white);
}

.pricing-header h3 {
    font-size: 22px;
    font-weight: 700;
    margin-bottom: 6px;
}

.pricing-header p {
    font-size: 14px;
    opacity: 0.7;
}

.pricing-body {
    padding: 32px;
}

.pricing-price {
    text-align: center;
    margin-bottom: 28px;
    padding-bottom: 28px;
    border-bottom: 1px solid var(--light);
}

.pricing-price .currency {
    font-size: 28px;
    font-weight: 500;
    color: var(--dark);
    vertical-align: top;
}

.pricing-price .amount {
    font-size: 56px;
    font-weight: 900;
    background: var(--gradient-2);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1;
}

.pricing-price .period {
    font-size: 15px;
    color: var(--gray);
}

.pricing-price-text {
    font-size: 32px;
    font-weight: 700;
    background: var(--gradient-2);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.pricing-features {
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.pricing-features li {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 15px;
    color: var(--dark-2);
}

.pricing-features li i {
    color: #22c55e;
    font-size: 18px;
}

.pricing-footer {
    padding: 0 32px 32px;
}

.pricing-note {
    text-align: center;
    margin-top: 16px;
    font-size: 13px;
    color: var(--gray-light);
}

/* ========== CTA ========== */
.cta {
    background: var(--gradient-1);
    position: relative;
    overflow: hidden;
    padding: 80px 0;
}

.cta::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(ellipse at 20% 80%, rgba(37, 99, 235, 0.2) 0%, transparent 50%),
                radial-gradient(ellipse at 80% 20%, rgba(99, 102, 241, 0.15) 0%, transparent 50%);
}

.cta-content {
    position: relative;
    z-index: 1;
    text-align: center;
    color: var(--white);
}

.cta-content h2 {
    font-size: 36px;
    font-weight: 700;
    margin-bottom: 12px;
}

.cta-content > p {
    font-size: 17px;
    opacity: 0.75;
    margin-bottom: 36px;
}

.cta-btns {
    display: flex;
    justify-content: center;
    gap: 16px;
    flex-wrap: wrap;
    margin-bottom: 30px;
}

.contact-card {
    background: rgba(255,255,255,0.08);
    border: 1px solid rgba(255,255,255,0.1);
    border-radius: var(--radius-md);
    padding: 28px 32px;
    display: inline-flex;
    gap: 32px;
    flex-wrap: wrap;
    justify-content: center;
    backdrop-filter: blur(10px);
    margin-top: 10px;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 15px;
    color: rgba(255,255,255,0.85);
}

.contact-item i {
    color: var(--accent);
}

.contact-item.contact-qr {
    align-items: center;
}

.wechat-qr-img {
    width: 80px;
    height: 80px;
    border-radius: 8px;
    background: var(--white);
    padding: 4px;
}

/* ========== Footer ========== */
.footer {
    background: var(--dark);
    color: rgba(255,255,255,0.7);
    padding: 60px 0 0;
}

.footer-grid {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr 1.3fr;
    gap: 40px;
    padding-bottom: 40px;
    border-bottom: 1px solid rgba(255,255,255,0.08);
}

.footer-logo {
    font-size: 22px;
    font-weight: 700;
    color: var(--white);
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 16px;
}

.footer-logo i {
    color: var(--primary-light);
}

.footer-logo-img {
    height: 36px;
    width: 36px;
    object-fit: contain;
}

.footer-brand p {
    font-size: 14px;
    line-height: 1.7;
    margin-bottom: 20px;
}

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

.footer-social a {
    width: 38px;
    height: 38px;
    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);
    font-size: 16px;
    transition: var(--transition);
}

.footer-social a:hover {
    background: var(--primary);
    color: var(--white);
}

.footer-col h4 {
    font-size: 16px;
    font-weight: 600;
    color: var(--white);
    margin-bottom: 20px;
}

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

.footer-col ul li {
    font-size: 14px;
}

.footer-col ul li a {
    color: rgba(255,255,255,0.6);
    transition: var(--transition);
}

.footer-col ul li a:hover {
    color: var(--white);
    padding-left: 4px;
}

.footer-contact ul li {
    display: flex;
    align-items: center;
    gap: 10px;
}

.footer-contact ul li i {
    color: var(--primary-light);
    width: 16px;
}

.footer-wechat {
    margin-top: 18px;
    text-align: center;
    display: inline-block;
}

.footer-qr-img {
    width: 110px;
    height: 110px;
    border-radius: 8px;
    background: var(--white);
    padding: 6px;
    display: block;
    margin-bottom: 8px;
}

.footer-wechat span {
    font-size: 12px;
    color: rgba(255,255,255,0.55);
}

.footer-bottom {
    padding: 20px 0;
    text-align: center;
    font-size: 13px;
    color: rgba(255,255,255,0.4);
}

.footer-bottom a {
    color: rgba(255,255,255,0.5);
}

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

/* ========== Back to Top ========== */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 44px;
    height: 44px;
    background: var(--gradient-2);
    color: var(--white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    box-shadow: var(--shadow-md);
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: var(--transition);
    z-index: 999;
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.back-to-top:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
}

/* ========== Animations ========== */
.animate-fadeInUp {
    animation: fadeInUp 0.8s ease forwards;
}

.delay-1 { animation-delay: 0.2s; opacity: 0; }
.delay-2 { animation-delay: 0.4s; opacity: 0; }
.delay-3 { animation-delay: 0.6s; opacity: 0; }

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

/* ========== Scroll Reveal ========== */
.reveal {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

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

/* ========== Responsive ========== */
@media (max-width: 1024px) {
    .hero-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .hero-visual {
        max-width: 500px;
        margin: 0 auto;
    }
    
    .hero-title {
        font-size: 36px;
    }
    
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .transform-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .transform-item:last-child {
        grid-column: span 3;
        max-width: 300px;
        justify-self: center;
    }
    
    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .header {
        padding: 12px 0;
    }
    
    .nav {
        position: fixed;
        top: 0;
        right: -100%;
        width: 280px;
        height: 100vh;
        background: rgba(15, 23, 42, 0.98);
        backdrop-filter: blur(20px);
        padding: 100px 30px 40px;
        transition: var(--transition);
        z-index: 1000;
    }
    
    .nav.active {
        right: 0;
    }
    
    .nav-list {
        flex-direction: column;
        gap: 8px;
    }
    
    .nav-link {
        display: block;
        padding: 12px 16px;
        font-size: 16px;
    }
    
    .menu-toggle {
        display: flex;
    }
    
    .hero {
        min-height: 600px;
    }
    
    .hero-title {
        font-size: 28px;
    }
    
    .hero-subtitle {
        font-size: 15px;
    }
    
    .hero-grid {
        text-align: center;
    }
    
    .hero-btns {
        justify-content: center;
    }
    
    .hero-subtitle {
        margin-left: auto;
        margin-right: auto;
    }
    
    .section-title {
        font-size: 28px;
    }
    
    .section-subtitle {
        font-size: 15px;
    }
    
    .features-grid,
    .advantages-grid {
        grid-template-columns: 1fr;
    }
    
    .about-grid {
        grid-template-columns: 1fr;
    }
    
    .transform-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .transform-item:last-child {
        grid-column: span 2;
        max-width: 250px;
    }
    
    .value-grid {
        gap: 24px;
    }
    
    .value-divider {
        display: none;
    }
    
    .value-item {
        flex: 0 0 calc(50% - 12px);
    }
    
    .about-stats {
        gap: 24px;
    }
    
    .contact-card {
        flex-direction: column;
        gap: 16px;
        text-align: left;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
        gap: 32px;
    }
    
    .cta-content h2 {
        font-size: 26px;
    }
    
    .pricing-price .amount {
        font-size: 44px;
    }
    
    .dashboard-stats {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 24px;
    }
    
    .hero-btns {
        flex-direction: column;
        align-items: center;
    }
    
    .transform-grid {
        grid-template-columns: 1fr;
    }
    
    .transform-item:last-child {
        grid-column: span 1;
        max-width: none;
    }
    
    .value-item {
        flex: 0 0 100%;
    }
    
    .about-stats {
        flex-direction: column;
        gap: 16px;
    }
    
    .cta-btns {
        flex-direction: column;
        align-items: center;
    }
}