:root {
    /* Color Palette - Premium Dark */
    --bg-dark: #030407;
    --bg-card: rgba(13, 14, 22, 0.7);
    --bg-accent: rgba(59, 130, 246, 0.05);

    --primary: #3b82f6;
    /* Modern Blue */
    --primary-light: #60a5fa;
    --primary-glow: rgba(59, 130, 246, 0.3);

    --secondary: #fbbf24;
    /* Amber Gold */
    --secondary-glow: rgba(251, 191, 36, 0.2);

    --text-main: #f9fafb;
    --text-muted: #94a3b8;

    --glass-border: rgba(255, 255, 255, 0.08);
    --glass-grad: linear-gradient(135deg, rgba(255, 255, 255, 0.05) 0%, rgba(255, 255, 255, 0) 100%);

    --surface-grad: linear-gradient(180deg, rgba(255, 255, 255, 0.03) 0%, rgba(255, 255, 255, 0) 100%);

    /* 使用系统字体，不依赖Google Fonts */
    --font-main: 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'Source Han Sans CN', 'WenQuanYi Zen Hei', -apple-system, system-ui, sans-serif;
    --font-heading: 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'Source Han Sans CN', 'WenQuanYi Zen Hei', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
    scroll-padding-top: 80px; /* 补偿固定导航栏高度 */
}

/* 为所有section添加scroll-margin补偿 */
section[id],
header[id] {
    scroll-margin-top: 80px; /* 与导航栏高度匹配 */
}

body {
    background-color: var(--bg-dark);
    color: var(--text-main);
    font-family: var(--font-main);
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

/* 去除所有链接的默认样式 */
a {
    color: inherit;
    text-decoration: none;
    transition: color 0.3s ease, text-shadow 0.3s ease;
}

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

.container {
    max-width: 1240px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

/* Background Visuals */
.bg-layer {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    overflow: hidden;
}

.glow-circle {
    position: absolute;
    width: 50vw;
    height: 50vw;
    background: radial-gradient(circle, var(--primary-glow) 0%, transparent 70%);
    filter: blur(100px);
    opacity: 0.4;
}

.glow-1 {
    top: -20vw;
    right: -10vw;
}

.glow-2 {
    bottom: -10vw;
    left: -10vw;
    background: radial-gradient(circle, var(--secondary-glow) 0%, transparent 70%);
}

/* Navbar */
.nav {
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
    padding: 1.25rem 0;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    border-bottom: 1px solid transparent;
}

.nav.scrolled {
    background: rgba(3, 4, 7, 0.8);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--glass-border);
    padding: 0.75rem 0;
}

.nav-wrap {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 2.5rem;
    list-style: none;
}

.nav-links li a {
    color: var(--text-muted);
    text-decoration: none;
    font-weight: 500;
    transition: 0.3s;
    font-size: 0.95rem;
}

.nav-links li a:hover {
    color: var(--primary-light);
}

.nav-right {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.logo-wrap {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 800;
    font-family: var(--font-heading);
    font-size: 1.5rem;
    letter-spacing: -0.02em;
    color: white;
    text-decoration: none;
}

.logo-wrap img {
    width: 36px;
    height: auto;
}

.nav-btn {
    background: var(--primary);
    color: white;
    padding: 0.6rem 1.5rem;
    border-radius: 99px;
    text-decoration: none;
    font-weight: 700;
    font-size: 0.95rem;
    box-shadow: 0 4px 15px var(--primary-glow);
    transition: 0.3s;
}

.nav-btn:hover {
    transform: scale(1.05);
}

.menu-toggle {
    display: none;
    background: none;
    border: none;
    color: white;
    cursor: pointer;
    z-index: 2000;
}

/* Hero */
.hero {
    padding: 8rem 0 6rem;
    text-align: center;
    position: relative;
}

.hero-tag {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1.25rem;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--glass-border);
    border-radius: 99px;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--primary-light);
    margin-bottom: 2rem;
}

.hero h1 {
    font-family: var(--font-heading);
    font-size: clamp(1.75rem, 5vw, 2.75rem);
    line-height: 1.3;
    font-weight: 700;
    margin-bottom: 2rem;
    letter-spacing: -0.02em;
}

.grad-text {
    background: linear-gradient(to right, #fff, #3b82f6);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-p {
    font-size: 1.25rem;
    color: var(--text-muted);
    max-width: 700px;
    margin: 0 auto 3.5rem;
}

.hero-actions {
    display: flex;
    gap: 1.5rem;
    justify-content: center;
}

/* Buttons */
.btn {
    padding: 1rem 2.5rem;
    border-radius: 12px;
    font-weight: 700;
    text-decoration: none;
    transition: 0.4s;
    font-size: 1.1rem;
    display: inline-block;
}

.btn-p {
    background: var(--primary);
    color: white;
    box-shadow: 0 10px 30px var(--primary-glow);
}

.btn-p:hover {
    transform: translateY(-3px);
    box-shadow: 0 15px 40px var(--primary-glow);
}

.btn-s {
    background: linear-gradient(135deg, #f59e0b 0%, #fbbf24 100%);
    color: #030407;
    border: none;
    font-weight: 700;
}

.btn-s:hover {
    background: linear-gradient(135deg, #fbbf24 0%, #fcd34d 100%);
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(251, 191, 36, 0.3);
}

/* Section Header */
.sec-header {
    text-align: center;
    margin-bottom: 5rem;
}

.sec-header h2 {
    font-family: var(--font-heading);
    font-size: 2.75rem;
    font-weight: 800;
    margin-bottom: 1.25rem;
    letter-spacing: -0.02em;
}

.sec-header p {
    color: var(--text-muted);
    font-size: 1.15rem;
    max-width: 600px;
    margin: 0 auto;
}

/* Grids & Cards */
.section {
    padding: 2rem 0;
}

.section#quote {
    padding: 1rem 0;
}

.section-dark {
    background: rgba(255, 255, 255, 0.02);
}

.card-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}


.feature-card {
    background: var(--bg-card);
    padding: 3rem 2.5rem;
    border-radius: 24px;
    border: 1px solid var(--glass-border);
    transition: 0.4s;
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
}

.feature-card:hover {
    border-color: var(--primary);
    transform: translateY(-10px);
    background: rgba(13, 14, 22, 0.9);
}

.icon-box {
    width: 70px;
    height: 70px;
    background: var(--bg-accent);
    color: var(--primary);
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 2rem;
    font-size: 2rem;
}

.feature-card h3 {
    margin-bottom: 1rem;
    font-size: 1.5rem;
    font-weight: 700;
    color: #fff;
}

.feature-card p {
    color: var(--text-muted);
}

/* Timeline */
.time-wrap {
    max-width: 800px;
    margin: 0 auto;
    position: relative;
}

.time-item {
    display: flex;
    gap: 3rem;
    margin-bottom: 3rem;
    position: relative;
    padding-left: 100px;
}

.time-item::after {
    content: '';
    position: absolute;
    left: 35px;
    top: 70px;
    bottom: -3rem;
    width: 2px;
    background: linear-gradient(to bottom, var(--primary), transparent);
    z-index: 0;
}

.time-item:last-child::after {
    display: none;
}

.time-num {
    position: absolute;
    left: 0;
    top: 0;
    width: 70px;
    height: 70px;
    background: var(--bg-dark);
    border: 2px solid var(--primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 800;
    font-size: 1.5rem;
    color: var(--primary);
    z-index: 1;
    box-shadow: 0 0 20px var(--primary-glow);
}

.time-content {
    background: var(--bg-card);
    padding: 2.5rem;
    border-radius: 24px;
    border: 1px solid var(--glass-border);
    width: 100%;
}

.time-content h4 {
    margin-bottom: 0.75rem;
    font-size: 1.25rem;
}

/* Pricing */
.price-card {
    max-width: 600px;
    margin: 0 auto;
    background: var(--bg-card);
    border-radius: 32px;
    border: 2px solid var(--primary);
    padding: 2.5rem 2rem;
    text-align: center;
    box-shadow: 0 40px 100px -20px var(--primary-glow);
    position: relative;
    overflow: hidden;
}

.price-val {
    font-family: var(--font-heading);
    font-size: 5rem;
    font-weight: 900;
    color: var(--secondary);
    margin: 0.5rem 0;
}

.price-wrap {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
}

.price-save {
    font-size: 1rem;
    color: #10b981;
    font-weight: 600;
}

.contact-alt {
    text-align: center;
    margin-top: 1rem;
}

.wechat-box {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: rgba(16, 185, 129, 0.1);
    border: 1px solid #10b981;
    padding: 0.5rem 1rem;
    border-radius: 8px;
    color: #10b981;
}

.price-list {
    list-style: none;
    text-align: left;
    margin: 2rem 0;
}

.price-list li {
    padding: 0.8rem 0;
    display: flex;
    align-items: center;
    gap: 1rem;
    border-bottom: 1px solid var(--glass-border);
}

.price-list li:last-child {
    border-bottom: none;
}

/* Content Strategy */
.content-tabs {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.content-category {
    background: var(--bg-card);
    padding: 2.5rem;
    border-radius: 24px;
    border: 1px solid var(--glass-border);
    transition: 0.3s;
}

.content-category:hover {
    border-color: var(--primary);
}

.content-category h3 {
    font-size: 1.25rem;
    margin-bottom: 1.5rem;
    color: var(--secondary);
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.content-category ul {
    list-style: none;
}

.content-category li {
    padding: 0.6rem 0;
    color: var(--text-muted);
    font-size: 0.95rem;
    display: flex;
    gap: 0.75rem;
    line-height: 1.4;
}

.content-category li::before {
    content: '✓';
    color: var(--accent);
    font-weight: 900;
}

/* Team Grid */
.team-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}


.team-card {
    background: var(--bg-card);
    padding: 3rem 2rem;
    border-radius: 28px;
    border: 1px solid var(--glass-border);
    text-align: center;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
}

.team-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at top right, var(--primary-glow), transparent 60%);
    opacity: 0;
    transition: 0.4s;
}

.team-card:hover::before {
    opacity: 1;
}

.team-avatar {
    width: 100px;
    height: 100px;
    border-radius: 50%;
    margin: 0 auto 1.5rem;
    position: relative;
    z-index: 1;
    border: 3px solid var(--glass-border);
    transition: 0.4s;
    object-fit: cover;
    background: var(--bg-dark);
}

.team-card:hover .team-avatar {
    border-color: var(--primary);
    transform: scale(1.05);
    box-shadow: 0 0 20px var(--primary-glow);
}

.team-icon-large {
    font-size: 3.5rem;
    display: block;
    margin-bottom: 1rem;
    line-height: 1;
}

.team-card h3 {
    font-size: 1.25rem;
    margin-bottom: 0.5rem;
    position: relative;
    z-index: 1;
}

.team-card p {
    color: var(--text-muted);
    font-size: 0.95rem;
    position: relative;
    z-index: 1;
}


.team-icon-large {
    font-size: 3rem;
    margin-bottom: 1.25rem;
    display: block;
}

/* KPI Grid */
.kpi-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    gap: 1.5rem;
    margin-top: 3rem;
}

.kpi-card {
    background: rgba(255, 255, 255, 0.03);
    padding: 2rem 1rem;
    border-radius: 24px;
    border: 1px solid var(--glass-border);
    text-align: center;
    transition: 0.3s;
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.kpi-card:hover {
    border-color: var(--primary);
    background: rgba(255, 255, 255, 0.05);
}

.kpi-val {
    font-size: 2.5rem;
    font-weight: 900;
    color: #fff;
    display: block;
    margin-bottom: 0.25rem;
    line-height: 1;
}

.kpi-txt {
    font-size: 1rem;
    color: #fff;
    font-weight: 600;
}

.kpi-desc {
    font-size: 0.85rem;
    color: var(--text-muted);
    line-height: 1.4;
}

/* Platforms */
.platforms {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 1rem;
    margin: 3rem 0;
}

.plat-tag {
    background: var(--bg-card);
    padding: 0.75rem 1.5rem;
    border-radius: 12px;
    border: 1px solid var(--glass-border);
    font-weight: 700;
    font-size: 0.9rem;
    transition: 0.3s;
}

.plat-tag:hover {
    border-color: var(--primary);
    color: var(--primary);
}

/* Footer */
.footer {
    padding: 6rem 0 3rem;
    border-top: 1px solid var(--glass-border);
}

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

.footer-section {
    text-align: center;
}

.footer-section h4 {
    margin-bottom: 1.5rem;
    font-size: 1.1rem;
    color: #fff;
}

.footer-section ul {
    list-style: none;
}

.footer-section li {
    margin-bottom: 0.75rem;
    color: var(--text-muted);
    font-size: 0.9rem;
    line-height: 1.6;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.footer-section li i {
    flex-shrink: 0;
}

.footer-bottom {
    margin-top: 3rem;
    padding-top: 2rem;
    border-top: 1px solid var(--glass-border);
    text-align: center;
}

.footer-bottom p {
    color: var(--text-muted);
    font-size: 0.9rem;
}

/* Mobile */
@media (max-width: 968px) {
    /* 移动端导航栏高度可能更小，调整scroll补偿 */
    html {
        scroll-padding-top: 60px;
    }
    
    section[id],
    header[id] {
        scroll-margin-top: 60px;
    }
    
    .container {
        padding: 0 1.25rem;
    }

    .hero-actions {
        flex-direction: column;
    }

    .btn {
        width: 100%;
        text-align: center;
    }

    .sec-header h2 {
        font-size: 2.25rem;
    }

    .footer-grid {
        grid-template-columns: 1fr;
        gap: 2.5rem;
        text-align: center;
    }

    .footer-section h4 {
        font-size: 1rem;
        margin-bottom: 1rem;
    }

    .footer-section li {
        font-size: 0.85rem;
    }

    .card-grid,
    .team-grid,
    .content-tabs,
    .kpi-grid {
        grid-template-columns: 1fr !important;
        gap: 1.5rem;
    }



    .time-wrap {
        padding-left: 1rem;
    }

    .time-item {
        flex-direction: column;
        padding-left: 3.5rem;
        text-align: left;
        gap: 1.5rem;
        margin-bottom: 2.5rem;
    }

    .time-item::after {
        left: 20px;
        top: 45px;
        bottom: -2.5rem;
    }

    .time-num {
        width: 42px;
        height: 42px;
        font-size: 1.1rem;
        left: 0;
        top: 0;
        position: absolute;
        margin: 0;
    }

    .time-content {
        padding: 1.5rem;
    }

    .time-content h4 {
        font-size: 1.15rem;
        line-height: 1.4;
    }

    .time-content p {
        font-size: 0.95rem;
    }


    .price-card {
        padding: 3rem 1.5rem;
    }

    .price-val {
        font-size: 3.5rem;
    }

    .menu-toggle {
        display: block;
    }

    .nav-links {
        position: fixed;
        top: 0;
        right: -100%;
        width: 100%;
        height: 100vh;
        background: rgba(3, 4, 7, 0.98);
        flex-direction: column;
        justify-content: center;
        transition: 0.4s cubic-bezier(0.4, 0, 0.2, 1);
        z-index: 1500;
    }

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

    .nav-links li {
        margin: 1.5rem 0;
    }

    .nav-links li a {
        font-size: 1.5rem;
        color: white;
    }

    .nav-right .nav-btn {
        display: none;
    }
}

/* Modal Styles */
.modal {
    display: none;
    position: fixed;
    z-index: 9999;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(8px);
    align-items: center;
    justify-content: center;
    animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.modal-content {
    background: var(--bg-card);
    border-radius: 24px;
    padding: 2.5rem 2rem;
    max-width: 500px;
    width: 90%;
    position: relative;
    border: 1px solid var(--glass-border);
    box-shadow: 0 40px 100px -20px var(--primary-glow);
    animation: slideUp 0.3s ease;
}

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

.modal-close {
    position: absolute;
    top: 1rem;
    right: 1rem;
    background: transparent;
    border: none;
    color: var(--text-muted);
    font-size: 2rem;
    cursor: pointer;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    transition: 0.3s;
}

.modal-close:hover {
    background: rgba(255, 255, 255, 0.1);
    color: #fff;
}

.modal-content h3 {
    text-align: center;
    margin-bottom: 2rem;
    font-size: 1.5rem;
}

.modal-body {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 2rem;
}

.contact-item {
    flex: 1;
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.qrcode {
    width: 180px;
    height: 180px;
    border-radius: 12px;
    border: 2px solid var(--glass-border);
    padding: 8px;
    background: #fff;
}

.email-emoji {
    width: 180px;
    height: 180px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 8rem;
    line-height: 1;
    cursor: pointer;
    transition: 0.3s;
}

.email-emoji:hover {
    transform: scale(1.05);
}

.contact-label {
    margin-top: 1rem;
    color: var(--text-muted);
    font-size: 0.95rem;
    font-weight: 500;
}

.contact-sub {
    margin-top: 0.5rem;
    color: var(--text-muted);
    font-size: 0.85rem;
}

.email-address {
    margin-top: 0.5rem;
    color: var(--primary);
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    word-break: break-all;
}

.email-address:hover {
    text-decoration: underline;
}

.contact-divider {
    width: 1px;
    height: 200px;
    background: var(--glass-border);
}

@media (max-width: 600px) {
    .modal-content {
        padding: 2rem 1.5rem;
    }

    .modal-body {
        flex-direction: column;
        gap: 2rem;
    }

    .contact-divider {
        width: 200px;
        height: 1px;
    }

    .qrcode {
        width: 160px;
        height: 160px;
    }

    .email-emoji {
        width: 160px;
        height: 160px;
        font-size: 7rem;
    }
}
}