:root {
    --bg: #ffffff;
    --bg-secondary: #f7f8f9;
    --bg-warm: #fdfaf6;
    --bg-faq: #fdfaf6;
    --bg-contact: #f7f8f9;
    --text-primary: #1c1c1e;
    --text-secondary: #5c5c63;
    --text-muted: #8e8e95;
    --accent: #2d8c72;
    --accent-light: #e8f5f0;
    --accent-gradient: linear-gradient(135deg, #2d8c72 0%, #3dab8e 50%, #5cc4a8 100%);
    --warm: #f07b3f;
    --warm-light: #fff4ed;
    --card-shadow: 0 1px 3px rgba(0, 0, 0, 0.04), 0 8px 28px rgba(0, 0, 0, 0.06);
    --card-shadow-hover: 0 2px 8px rgba(0, 0, 0, 0.05), 0 18px 48px rgba(0, 0, 0, 0.1);
    --phone-shadow: 0 18px 55px rgba(45, 140, 114, 0.16), 0 6px 18px rgba(0, 0, 0, 0.07);
    --radius-sm: 8px;
    --radius: 14px;
    --radius-lg: 20px;
    --radius-xl: 28px;
    --max-width: 1160px;
    --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --primary: #2563eb;       
    --primary-light: #dbeafe;
    --qa-dark: #1e293b;
    --version-dark: #293b1e;
    --border: #e2e8f0;
    --bg-page: #f8fafc;
    --highlight-bg: #fef08a;
}

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

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'Noto Sans SC', 'Helvetica Neue', Arial, sans-serif;
    background-color: var(--bg);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    letter-spacing: -0.01em;
}

header {
    text-align: center;
    margin-top: 35px;
    margin-bottom: 35px;
    padding-top: 20px;
    padding-bottom: 20px;
    border-bottom: 2px solid var(--border);
}

/* ============ 导航栏 ============ */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 14px 0;
    transition: all var(--transition);
    background-color: transparent;
}
.navbar.scrolled {
    background: rgba(255, 255, 255, 0.88);
    backdrop-filter: blur(18px);
    -webkit-backdrop-filter: blur(18px);
    box-shadow: 0 1px 0 rgba(0, 0, 0, 0.05);
    padding: 8px 0;
    background-color: var(--bg);
}
.navbar-inner {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 28px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
    background-color: transparent;
}
.nav-logo {
    display: flex;
    align-items: center;
    gap: 9px;
    text-decoration: none;
    font-weight: 700;
    font-size: 1.3rem;
    color: var(--text-primary);
    letter-spacing: -0.4px;
    flex-shrink: 0;
}
.nav-logo-icon {
    width: 36px;
    height: 36px;
    background: var(--accent-gradient);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 1rem;
    font-weight: 800;
    box-shadow: 0 4px 12px rgba(45, 140, 114, 0.3);
}
.nav-links {
    display: flex;
    align-items: center;
    gap: 26px;
    list-style: none;
    flex-shrink: 0;
}
.nav-links a {
    text-decoration: none;
    color: var(--text-secondary);
    font-size: 0.9rem;
    font-weight: 500;
    transition: color 0.2s;
    white-space: nowrap;
}
.nav-links a:hover {
    color: var(--accent);
}
.nav-social {
    display: flex;
    font-size: 0.9rem;
    align-items: center;
    gap: 14px;
    flex-shrink: 0;
}
.nav-social a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: auto;
    height: 32px;
    #border-radius: 50%;
    #background: #f2f3f5;
    color: #5c5c63;
    transition: all 0.22s;
    text-decoration: none;
    flex-shrink: 0;
}
.nav-social a:hover {
    background: #e3e5e9;
    color: #1c1c1e;
    transform: translateY(-2px);
}
.nav-social svg {
    width: auto;
    height: 16px;
    fill: currentColor;
}
.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
    color: var(--text-primary);
}
.mobile-menu-btn svg {
    width: 24px;
    height: 24px;
}

/* ============ Hero ============ */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: 110px 28px 70px;
    position: relative;
    overflow: hidden;
    background:
        radial-gradient(ellipse at 72% 45%, rgba(45, 140, 114, 0.05) 0%, transparent 55%),
        radial-gradient(ellipse at 22% 28%, rgba(240, 123, 63, 0.03) 0%, transparent 50%),
        var(--bg);
}
.hero-glow {
    position: absolute;
    border-radius: 50%;
    filter: blur(100px);
    pointer-events: none;
}
.hero-glow.g1 {
    width: 520px;
    height: 520px;
    background: rgba(45, 140, 114, 0.08);
    top: -12%;
    right: -6%;
}
.hero-glow.g2 {
    width: 420px;
    height: 420px;
    background: rgba(240, 123, 63, 0.05);
    bottom: -18%;
    left: -8%;
}
.hero-inner {
    max-width: var(--max-width);
    margin: 0 auto;
    width: 100%;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
    align-items: center;
    position: relative;
    z-index: 1;
}
.hero-content {
    max-width: 500px;
}
.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 7px;
    background: var(--accent-light);
    color: var(--accent);
    padding: 7px 15px;
    border-radius: 50px;
    font-size: 0.82rem;
    font-weight: 600;
    margin-bottom: 22px;
    animation: fadeInUp 0.6s ease-out;
}
.hero-badge-dot {
    width: 7px;
    height: 7px;
    background: var(--accent);
    border-radius: 50%;
    animation: pulse 2s ease-in-out infinite;
}
@keyframes pulse {
    0%,
    100% {
        opacity: 1;
        transform: scale(1);
    }
    50% {
        opacity: 0.45;
        transform: scale(1.7);
    }
}
.hero-title {
    font-size: clamp(2.2rem, 4vw, 3rem);
    font-weight: 800;
    line-height: 1.14;
    letter-spacing: -1px;
    margin-bottom: 18px;
    color: var(--text-primary);
    animation: fadeInUp 0.6s ease-out 0.1s both;
}
.hero-title span {
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    color: transparent;
}
.hero-desc {
    font-size: 1.05rem;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 32px;
    animation: fadeInUp 0.6s ease-out 0.2s both;
}
.hero-buttons {
    display: flex;
    gap: 14px;
    flex-wrap: wrap;
    animation: fadeInUp 0.6s ease-out 0.3s both;
}
.btn {
    display: inline-flex;
    align-items: center;
    gap: 9px;
    padding: 13px 26px;
    border-radius: 50px;
    font-weight: 600;
    font-size: 0.9rem;
    text-decoration: none;
    cursor: pointer;
    transition: all 0.25s;
    border: none;
    font-family: inherit;
    white-space: nowrap;
}
.btn-primary {
    background: #1c1c1e;
    color: #fff;
    box-shadow: 0 6px 22px rgba(28, 28, 30, 0.2);
}
.btn-primary:hover {
    background: #000;
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(28, 28, 30, 0.3);
}
.btn-outline {
    background: #fff;
    color: var(--text-primary);
    border: 1.5px solid #dddde3;
}
.btn-outline:hover {
    border-color: #b8bac2;
    background: #fafbfc;
    transform: translateY(-2px);
    box-shadow: 0 4px 14px rgba(0, 0, 0, 0.04);
}
.btn-icon-svg {
    width: 18px;
    height: 18px;
    flex-shrink: 0;
}
.hero-stats {
    display: flex;
    gap: 32px;
    margin-top: 36px;
    animation: fadeInUp 0.6s ease-out 0.4s both;
}
.hero-stat-val {
    font-size: 1.4rem;
    font-weight: 700;
    letter-spacing: -0.5px;
    color: var(--text-primary);
}
.hero-stat-lbl {
    font-size: 0.78rem;
    color: var(--text-muted);
}


/* ============ 数据展示条 ============ */
.stats-strip {
    padding: 40px 28px;
    background: var(--accent-light);
}
.stats-strip-inner {
    max-width: var(--max-width);
    margin: 0 auto;
    display: flex;
    justify-content: space-around;
    flex-wrap: wrap;
    gap: 24px;
    text-align: center;
}
.stat-item h4 {
    font-size: 1.6rem;
    font-weight: 800;
    color: var(--accent);
    letter-spacing: -0.5px;
}
.stat-item p {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-top: 2px;
}
/* ============ 联系方式展示条 ============ */
.contacts-strip {
    padding: 40px 28px;
    background: var(--bg-contact);
}
/* ============ 页脚 ============ */
.footer {
    padding: 40px 28px;
    background: #1c1c1e;
    color: #b0b0b8;
    text-align: center;
}
.footer-inner {
    max-width: var(--max-width);
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 16px;
}
.footer-copy {
    font-size: 0.8rem;
    color: #8e8e95;
}
.footer-links {
    display: flex;
    gap: 22px;
    list-style: none;
    flex-wrap: wrap;
}
.footer-links a {
    text-decoration: none;
    color: #b0b0b8;
    font-size: 0.8rem;
    transition: color 0.2s;
}
.footer-links a:hover {
    color: #fff;
}
.footer-social {
    display: flex;
    gap: 12px;
}
.footer-social a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 34px;
    height: 34px;
    border-radius: 50%;
    background: #2e2e34;
    color: #b0b0b8;
    transition: all 0.22s;
    text-decoration: none;
}
.footer-social a:hover {
    background: #3e3e46;
    color: #fff;
}
.footer-social svg {
    width: 15px;
    height: 15px;
    fill: currentColor;
}