:root {
    --yww-pro-blue: #0052d4;
    --yww-pro-light-blue: #6fb1fc;
    --yww-pro-dark: #1a1a1a;
    --yww-pro-bg: #eef6ff;
    --yww-pro-white: #ffffff;
    --yww-pro-shadow: 0 10px 40px rgba(0, 82, 212, 0.1);
    --yww-pro-radius: 16px;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Microsoft YaHei", sans-serif;
    color: var(--yww-pro-dark);
    background-color: var(--yww-pro-bg);
    line-height: 1.6;
    overflow-x: hidden;
}

/* Navbar */
.navbar-pro {
    position: fixed; top: 0; width: 100%; height: 72px;
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(20px);
    display: flex; align-items: center; justify-content: space-between;
    padding: 0 8%; z-index: 1000;
    border-bottom: 1px solid rgba(0,0,0,0.05);
}

.logo-pro {
    display: flex; align-items: center; gap: 10px;
    font-size: 22px; font-weight: 800; color: var(--yww-pro-blue);
}

.nav-links-pro { display: flex; gap: 40px; }
.nav-links-pro a {
    text-decoration: none; color: #444; font-size: 15px; font-weight: 500;
    transition: color 0.3s;
}
.nav-links-pro a:hover { color: var(--yww-pro-blue); }

/* Hero Section */
.hero-pro {
    padding: 160px 8% 100px;
    background: linear-gradient(135deg, #e0efff 0%, var(--yww-pro-bg) 100%);
    display: flex; align-items: center; justify-content: space-between;
    gap: 60px;
}

.hero-content-pro { flex: 1; }
.hero-content-pro h1 {
    font-size: 54px; font-weight: 900; line-height: 1.2;
    color: #111; margin-bottom: 24px;
}
.hero-content-pro h1 span { color: var(--yww-pro-blue); }
.hero-content-pro p {
    font-size: 18px; color: #666; margin-bottom: 40px; max-width: 540px;
}

.hero-image-pro {
    flex: 1.2; position: relative;
    display: flex; justify-content: flex-end;
}

/* Mockup of YiWaiWai Sidebar */
.yww-mockup {
    width: 100%; max-width: 600px;
    background: white; border-radius: 12px;
    box-shadow: 0 30px 60px rgba(0,0,0,0.12);
    border: 1px solid rgba(0,0,0,0.05);
    overflow: hidden;
    position: relative;
}

.mockup-header {
    height: 40px; background: #f8f9fa; border-bottom: 1px solid #eee;
    display: flex; align-items: center; padding: 0 15px; gap: 8px;
}
.dot { width: 10px; height: 10px; border-radius: 50%; }
.dot-r { background: #ff5f56; } .dot-y { background: #ffbd2e; } .dot-g { background: #27c93f; }

.mockup-body { display: flex; height: 400px; }
.mockup-sidebar {
    width: 180px; background: #2c3e50; padding: 20px 0;
    display: flex; flex-direction: column; gap: 5px;
}
.sidebar-item {
    padding: 10px 20px; font-size: 13px; color: #95a5a6;
    display: flex; align-items: center; gap: 10px;
}
.sidebar-item.active { background: var(--yww-pro-blue); color: white; }

.mockup-main { flex: 1; padding: 20px; background: #fff; }
.phrase-item {
    padding: 12px; border-bottom: 1px solid #f0f0f0; font-size: 14px;
    color: #333; cursor: pointer; transition: background 0.2s;
}
.phrase-item:hover { background: #f8faff; }

/* Features Grid */
.features-pro { padding: 100px 8%; text-align: center; }
.section-tag {
    color: var(--yww-pro-blue); font-weight: 700; letter-spacing: 2px;
    text-transform: uppercase; font-size: 14px; margin-bottom: 15px; display: block;
}
.section-title-pro { font-size: 36px; font-weight: 800; margin-bottom: 60px; }

.grid-pro {
    display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
}

.card-pro {
    padding: 40px; border-radius: var(--yww-pro-radius);
    background: #fff; border: 1px solid #f0f0f0;
    transition: all 0.3s ease; text-align: left;
}
.card-pro:hover {
    transform: translateY(-10px); box-shadow: var(--yww-pro-shadow);
    border-color: var(--yww-pro-blue);
}

.card-link-pro {
    text-decoration: none; color: inherit; display: block;
}
.card-more-pro {
    margin-top: 20px; font-size: 14px; font-weight: 700; color: var(--yww-pro-blue);
    display: flex; align-items: center; gap: 8px; opacity: 0; transform: translateX(-10px);
    transition: all 0.3s ease;
}
.card-pro:hover .card-more-pro {
    opacity: 1; transform: translateX(0);
}

.card-pro i {
    font-size: 32px; color: var(--yww-pro-blue); margin-bottom: 25px;
}
.card-pro h3 { font-size: 20px; margin-bottom: 15px; }
.card-pro p { color: #666; font-size: 15px; }

/* Platforms Section */
.platforms-pro {
    padding: 80px 8%; background: #e6f2ff; text-align: center;
}
.platform-logos {
    display: flex; justify-content: center; align-items: center;
    gap: 60px; flex-wrap: wrap; margin-top: 40px; opacity: 0.6;
}
.platform-logos i { font-size: 40px; }

/* Detail Modules */
.detail-section-pro { padding: 100px 8%; display: flex; align-items: center; gap: 80px; }
.detail-section-pro:nth-child(even) { flex-direction: row-reverse; background: #e6f2ff; }
.detail-info-pro { flex: 1; }
.detail-image-pro { flex: 1.2; border-radius: 20px; overflow: hidden; box-shadow: var(--yww-pro-shadow); }
.detail-image-pro img { width: 100%; height: auto; display: block; }
.detail-info-pro h2 { font-size: 32px; font-weight: 800; margin-bottom: 20px; }
.detail-info-pro p { color: #666; margin-bottom: 30px; font-size: 16px; }

/* Industry Grid */
.industry-grid {
    display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 25px; padding: 60px 0;
}
.industry-card {
    background: #fff; padding: 30px; border-radius: 12px; border: 1px solid #eee;
    text-align: center; transition: all 0.3s;
}
.industry-card:hover { border-color: var(--yww-pro-blue); transform: translateY(-5px); }
.industry-card i { font-size: 24px; color: var(--yww-pro-blue); margin-bottom: 15px; }

/* Stats Section */
.stats-section-pro {
    padding: 80px 8%; background: #fff;
    display: flex; justify-content: space-around; gap: 40px; flex-wrap: wrap;
    border-top: 1px solid #f0f0f0; border-bottom: 1px solid #f0f0f0;
}
.stat-item-pro { text-align: center; }
.stat-number-pro { font-size: 48px; font-weight: 900; color: var(--yww-pro-blue); margin-bottom: 10px; }
.stat-label-pro { font-size: 14px; color: #999; font-weight: 600; text-transform: uppercase; }

/* FAQ Section */
.faq-section-pro { padding: 100px 8%; background: #fff; max-width: 1000px; margin: 0 auto; }
.faq-item-pro { margin-bottom: 30px; padding: 25px; border-radius: 12px; background: #ffffff; border: 1px solid #d0e4ff; }
.faq-question-pro { font-size: 18px; font-weight: 700; margin-bottom: 15px; color: #111; display: flex; align-items: center; gap: 12px; }
.faq-question-pro i { color: var(--yww-pro-blue); }
.faq-answer-pro { color: #666; font-size: 15px; line-height: 1.8; }

/* Steps Section */
.steps-grid-pro {
    display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px; padding: 60px 0;
}
.step-item-pro { position: relative; text-align: center; }
.step-number-pro {
    width: 40px; height: 40px; background: var(--yww-pro-blue); color: white;
    border-radius: 50%; display: flex; align-items: center; justify-content: center;
    font-weight: 800; margin: 0 auto 20px;
}

/* Footer */
.footer-pro {
    padding: 80px 8% 40px; background: #fff; border-top: 1px solid #eee;
    text-align: center;
}
.compliance-pro { margin-top: 40px; padding-top: 30px; border-top: 1px solid #f0f0f0; }
.compliance-text { font-size: 13px; color: #999; line-height: 2; }
.warning-pro { color: #d93025; font-weight: 700; margin-top: 10px; display: block; }

/* Responsive */
@media (max-width: 1024px) {
    .hero-pro { flex-direction: column; text-align: center; padding-top: 120px; }
    .hero-content-pro { margin-bottom: 50px; }
    .hero-content-pro p { margin: 0 auto 40px; }
    .nav-links-pro { display: none; }
}