:root {
    --zoom-blue: #0B5CFF;
    --zoom-blue-dark: #0044CC;
    --zoom-blue-light: #E8F0FF;
    --zoom-text: #232333;
    --zoom-subtext: #6E7680;
    --zoom-bg: #FFFCF7;
    --zoom-gray: #FFF9F0;
    --zoom-border: #F0E6D2;
    --zoom-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
    --zoom-radius: 12px;
    --font-main: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

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

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

/* --- 导航栏 --- */
.zoom-nav {
    position: fixed;
    top: 0;
    width: 100%;
    background: white;
    border-bottom: 1px solid var(--zoom-border);
    z-index: 1000;
    padding: 0.75rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.zoom-logo {
    display: flex;
    align-items: center;
    gap: 8px;
    text-decoration: none;
    color: var(--zoom-blue);
    font-weight: 800;
    font-size: 1.5rem;
    letter-spacing: -1px;
}

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

.zoom-nav-links a {
    text-decoration: none;
    color: var(--zoom-text);
    font-weight: 600;
    font-size: 0.95rem;
    transition: color 0.2s;
}

.zoom-nav-links a:hover {
    color: var(--zoom-blue);
}

.zoom-nav-auth {
    display: flex;
    gap: 1rem;
    align-items: center;
}

.btn-zoom-outline {
    padding: 0.6rem 1.2rem;
    border: 1.5px solid var(--zoom-blue);
    border-radius: 50px;
    color: var(--zoom-blue);
    text-decoration: none;
    font-weight: 700;
    font-size: 0.9rem;
    transition: all 0.2s;
}

.btn-zoom-primary {
    padding: 0.6rem 1.5rem;
    background: var(--zoom-blue);
    color: white;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 700;
    font-size: 0.9rem;
    transition: background 0.2s;
}

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

/* --- Hero 区域 --- */
.zoom-hero {
    padding: 10rem 5% 6rem;
    display: flex;
    align-items: center;
    gap: 4rem;
    max-width: 1300px;
    margin: 0 auto;
}

.zoom-hero-content {
    flex: 1;
}

.zoom-hero-visual {
    flex: 1.2;
    position: relative;
}

.zoom-hero-title {
    font-size: 4rem;
    line-height: 1.1;
    font-weight: 800;
    margin-bottom: 1.5rem;
    letter-spacing: -2px;
}

.zoom-hero-desc {
    font-size: 1.25rem;
    color: var(--zoom-subtext);
    margin-bottom: 2.5rem;
    max-width: 500px;
}

.zoom-hero-form {
    display: flex;
    gap: 1rem;
    max-width: 500px;
}

.zoom-input {
    flex: 1;
    padding: 1rem 1.5rem;
    border: 1px solid var(--zoom-border);
    border-radius: 12px;
    font-size: 1rem;
    outline: none;
}

.zoom-input:focus {
    border-color: var(--zoom-blue);
    box-shadow: 0 0 0 4px var(--zoom-blue-light);
}

/* --- 信任背书 --- */
.zoom-trust {
    padding: 4rem 5%;
    text-align: center;
    background: var(--zoom-gray);
}

.zoom-trust-logos {
    display: flex;
    justify-content: center;
    gap: 4rem;
    opacity: 0.5;
    filter: grayscale(1);
    margin-top: 2rem;
    flex-wrap: wrap;
}

/* --- 功能卡片 --- */
.zoom-features {
    padding: 8rem 5%;
    max-width: 1300px;
    margin: 0 auto;
}

.zoom-section-head {
    text-align: center;
    margin-bottom: 5rem;
}

.zoom-section-head h2 {
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: 1rem;
}

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

.zoom-feature-card {
    padding: 2.5rem;
    background: white;
    border: 1px solid var(--zoom-border);
    border-radius: var(--zoom-radius);
    transition: all 0.3s;
    cursor: pointer;
    text-decoration: none;
    color: inherit;
}

.zoom-feature-card:hover {
    border-color: var(--zoom-blue);
    box-shadow: 0 20px 40px rgba(0,0,0,0.05);
    transform: translateY(-5px);
}

.zoom-card-icon {
    font-size: 2.5rem;
    margin-bottom: 1.5rem;
    display: block;
}

.zoom-feature-card h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

.zoom-feature-card p {
    color: var(--zoom-subtext);
}

/* --- 底部 CTA --- */
.zoom-footer-cta {
    background: var(--zoom-blue);
    color: white;
    padding: 6rem 5%;
    text-align: center;
}

.zoom-footer-cta h2 {
    font-size: 3rem;
    margin-bottom: 2rem;
}

/* --- 页脚 --- */
.zoom-footer {
    padding: 4rem 5%;
    background: #000511;
    color: white;
}

.zoom-footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr 1fr;
    gap: 4rem;
    max-width: 1300px;
    margin: 0 auto;
}

.zoom-footer-col h4 {
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 1.5rem;
    opacity: 0.6;
}

.zoom-footer-col ul {
    list-style: none;
}

.zoom-footer-col li {
    margin-bottom: 0.8rem;
}

.zoom-footer-col a {
    text-decoration: none;
    color: white;
    font-size: 0.9rem;
    opacity: 0.8;
}

.zoom-footer-col a:hover {
    opacity: 1;
    color: var(--zoom-blue);
}

/* --- 响应式 --- */
@media (max-width: 1024px) {
    .zoom-hero { flex-direction: column; text-align: center; }
    .zoom-hero-desc { margin: 0 auto 2.5rem; }
    .zoom-hero-form { margin: 0 auto; }
    .zoom-feature-grid { grid-template-columns: 1fr 1fr; }
    .zoom-footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
    .zoom-nav-links { display: none; }
    .zoom-hero-title { font-size: 2.5rem; }
    .zoom-feature-grid { grid-template-columns: 1fr; }
}