/* ========================================
   爱加速 - V3 高端绿色风 共享样式
   ======================================== */

:root {
    --primary: #22C55E;
    --primary-dark: #16A34A;
    --primary-light: #4ADE80;
    --primary-glow: rgba(34, 197, 94, 0.1);
    --primary-glow-strong: rgba(34, 197, 94, 0.18);
    --bg: #FAFAF9;
    --bg-card: #FFFFFF;
    --bg-section: #F4F4F5;
    --bg-warm: #FEFCE8;
    --text: #18181B;
    --text-secondary: #71717A;
    --text-muted: #A1A1AA;
    --border: #E4E4E7;
    --border-light: #F4F4F5;
    --success: #22C55E;
    --warning: #F59E0B;
    --radius: 14px;
    --radius-lg: 18px;
    --radius-xl: 24px;
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.04), 0 1px 2px rgba(0,0,0,0.03);
    --shadow-md: 0 4px 16px rgba(0,0,0,0.06), 0 2px 6px rgba(0,0,0,0.03);
    --shadow-lg: 0 10px 40px rgba(0,0,0,0.08), 0 4px 12px rgba(0,0,0,0.04);
    --shadow-green: 0 8px 32px rgba(34,197,94,0.15);
    --container: 1200px;
    --nav-h: 72px;
}

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

html { scroll-behavior: smooth; font-size: 16px; }

body {
    font-family: 'Noto Sans SC', 'Inter', -apple-system, sans-serif;
    color: var(--text);
    background: var(--bg);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
}

::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--primary-light); border-radius: 3px; }

.container { max-width: var(--container); margin: 0 auto; padding: 0 24px; }

/* NAVBAR */
.navbar {
    position: fixed; top: 0; left: 0; right: 0; height: var(--nav-h);
    z-index: 1000; background: rgba(250,250,249,0.88);
    backdrop-filter: blur(16px); -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid transparent; transition: all 0.3s;
}
.navbar.scrolled { border-bottom-color: var(--border); box-shadow: var(--shadow-sm); }

.nav-container {
    max-width: var(--container); margin: 0 auto; padding: 0 24px;
    height: 100%; display: flex; align-items: center; gap: 32px;
}

.nav-logo {
    display: flex; align-items: center; gap: 10px;
    text-decoration: none; color: var(--text); font-weight: 700;
    font-size: 1.2rem; font-family: 'Inter', sans-serif;
}

.nav-links { display: flex; align-items: center; gap: 4px; margin-left: auto; }
.nav-links a {
    text-decoration: none; color: var(--text-secondary);
    font-size: 0.9rem; font-weight: 500; padding: 8px 14px;
    border-radius: 10px; transition: all 0.2s;
}
.nav-links a:hover, .nav-links a.active { color: var(--primary); background: var(--primary-glow); }

.nav-cta {
    text-decoration: none; background: var(--primary); color: #fff;
    font-size: 0.875rem; font-weight: 700; padding: 10px 22px;
    border-radius: 10px; transition: all 0.25s; white-space: nowrap;
    box-shadow: 0 2px 8px rgba(34,197,94,0.2);
}
.nav-cta:hover { background: var(--primary-dark); transform: translateY(-1px); box-shadow: 0 4px 14px rgba(34,197,94,0.3); }

/* BUTTONS */
.btn-primary {
    display: inline-flex; align-items: center; gap: 8px;
    background: var(--primary); color: #fff;
    font-weight: 700; font-size: 0.95rem; padding: 14px 30px;
    border-radius: 12px; text-decoration: none; transition: all 0.25s;
    border: none; cursor: pointer;
    box-shadow: 0 4px 14px rgba(34,197,94,0.25);
}
.btn-primary:hover { background: var(--primary-dark); transform: translateY(-2px); box-shadow: 0 8px 24px rgba(34,197,94,0.35); }
.btn-primary.large { font-size: 1.05rem; padding: 16px 40px; border-radius: 14px; }

.btn-ghost {
    display: inline-flex; align-items: center; gap: 6px;
    color: var(--text-secondary); font-weight: 500; font-size: 0.95rem;
    text-decoration: none; padding: 14px 22px; border-radius: 12px;
    transition: all 0.2s; border: 1.5px solid var(--border);
}
.btn-ghost:hover { color: var(--primary); border-color: var(--primary); background: var(--primary-glow); }

.btn-outline {
    display: inline-flex; align-items: center; gap: 8px;
    background: transparent; color: var(--primary);
    font-weight: 700; font-size: 0.95rem; padding: 14px 30px;
    border-radius: 12px; text-decoration: none; border: 2px solid var(--primary);
    transition: all 0.25s; cursor: pointer;
}
.btn-outline:hover { background: var(--primary); color: #fff; }

/* SECTION */
.section { padding: 100px 0; }

.section-header { text-align: center; margin-bottom: 60px; }
.section-header h2 {
    font-size: 2.5rem; font-weight: 800; line-height: 1.2;
    margin-bottom: 16px; letter-spacing: -0.02em;
}
.section-header p { font-size: 1.1rem; color: var(--text-secondary); max-width: 560px; margin: 0 auto; }

.section-tag {
    display: inline-block; font-size: 0.8rem; font-weight: 700;
    text-transform: uppercase; letter-spacing: 0.08em;
    color: var(--primary-dark); background: var(--primary-glow);
    padding: 6px 14px; border-radius: 20px; margin-bottom: 16px;
    border: 1px solid rgba(34,197,94,0.15);
}

/* HERO */
.hero {
    min-height: 100vh; padding-top: var(--nav-h);
    display: flex; align-items: center; position: relative; overflow: hidden;
}

.hero-bg {
    position: absolute; inset: 0; z-index: 0;
}

.hbg-blob1 {
    position: absolute; top: -200px; left: -200px;
    width: 700px; height: 700px;
    background: radial-gradient(circle, rgba(34,197,94,0.08) 0%, transparent 65%);
    border-radius: 50%;
}
.hbg-blob2 {
    position: absolute; bottom: -200px; right: -100px;
    width: 500px; height: 500px;
    background: radial-gradient(circle, rgba(34,197,94,0.05) 0%, transparent 65%);
    border-radius: 50%;
}

.hero-content {
    max-width: var(--container); margin: 0 auto; padding: 0 24px;
    padding-top: 40px; text-align: center; width: 100%; position: relative; z-index: 1;
}

.hero-badge {
    display: inline-flex; align-items: center; gap: 8px;
    font-size: 0.85rem; font-weight: 500; color: var(--primary-dark);
    background: var(--primary-glow); padding: 8px 18px;
    border-radius: 24px; border: 1px solid rgba(34,197,94,0.2);
    margin-bottom: 28px;
}
.badge-icon { font-size: 0.9rem; }

.hero-title {
    font-size: 3.5rem; font-weight: 900; line-height: 1.1;
    letter-spacing: -0.03em; margin-bottom: 24px;
}

.gradient-text-green {
    background: linear-gradient(135deg, #16A34A 0%, #4ADE80 100%);
    -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
}

.hero-subtitle {
    font-size: 1.1rem; color: var(--text-secondary);
    line-height: 1.7; margin-bottom: 40px;
    max-width: 640px; margin-left: auto; margin-right: auto;
}

.hero-stats {
    display: inline-flex; align-items: center;
    background: var(--bg-card); border: 1px solid var(--border);
    border-radius: var(--radius-xl); padding: 22px 40px;
    margin-bottom: 40px; gap: 0;
    box-shadow: var(--shadow-md);
}

.stat-item { display: flex; flex-direction: column; align-items: center; flex: 1; padding: 0 28px; }
.stat-num {
    font-size: 1.7rem; font-weight: 900; color: var(--text);
    font-family: 'Inter', sans-serif; letter-spacing: -0.03em;
}
.stat-num span { font-size: 0.95rem; font-weight: 600; }
.stat-label { font-size: 0.75rem; color: var(--text-muted); margin-top: 5px; white-space: nowrap; }
.stat-div { width: 1px; height: 44px; background: var(--border); flex-shrink: 0; }

.hero-actions { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }

/* STATUS BAR */
.status-bar {
    background: var(--bg-card); border-bottom: 1px solid var(--border); padding: 10px 0;
}
.status-bar-inner {
    max-width: var(--container); margin: 0 auto; padding: 0 24px;
    display: flex; align-items: center; gap: 20px;
    font-size: 0.8rem; color: var(--text-secondary);
}
.status-item { display: flex; align-items: center; gap: 6px; color: var(--text); font-weight: 500; }
.s-dot {
    width: 8px; height: 8px; background: var(--success);
    border-radius: 50%; box-shadow: 0 0 6px rgba(34,197,94,0.5);
    animation: pulse-dot 2s infinite;
}
@keyframes pulse-dot {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.6; transform: scale(1.3); }
}
.lock-info {
    margin-left: auto; display: flex; align-items: center;
    gap: 5px; color: var(--success); font-weight: 600;
}

/* COMPARISON */
.comp-table {
    background: var(--bg-card); border: 1px solid var(--border);
    border-radius: var(--radius-xl); overflow: hidden; margin-bottom: 32px;
    box-shadow: var(--shadow-sm);
}
.comp-header {
    display: grid; grid-template-columns: 2fr 2fr 2fr;
    background: var(--text); color: #fff;
    font-weight: 700; font-size: 0.9rem; padding: 18px 28px;
}
.comp-header .green { color: #86EFAC; }
.comp-row {
    display: grid; grid-template-columns: 2fr 2fr 2fr;
    padding: 18px 28px; border-bottom: 1px solid var(--border-light);
    font-size: 0.9rem; transition: background 0.2s;
}
.comp-row:last-child { border-bottom: none; }
.comp-row:hover { background: rgba(34,197,94,0.03); }
.comp-row > span:first-child { font-weight: 700; color: var(--text); }
.no { color: var(--text-muted); }
.warn { color: var(--warning); }
.yes { color: var(--primary-dark); font-weight: 700; }
.comp-cta { text-align: center; }

/* SCENARIOS */
.scenarios { background: var(--bg-section); }
.scenario-grid {
    display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px;
}
.scenario-card {
    background: var(--bg-card); border: 1px solid var(--border);
    border-radius: var(--radius-xl); padding: 30px 26px;
    transition: all 0.3s; position: relative; overflow: hidden;
    box-shadow: var(--shadow-sm);
}
.scenario-card:hover {
    border-color: var(--primary); box-shadow: var(--shadow-green);
    transform: translateY(-4px);
}
.scenario-card.featured {
    border-color: var(--primary); box-shadow: var(--shadow-green);
    background: linear-gradient(160deg, #F0FDF4 0%, #FFFFFF 100%);
}
.sc-num {
    position: absolute; top: 20px; right: 22px;
    font-size: 2.2rem; font-weight: 900; font-family: 'Inter', sans-serif;
    color: rgba(34,197,94,0.08); letter-spacing: -0.05em; line-height: 1;
}
.sc-icon { font-size: 2rem; margin-bottom: 14px; }
.scenario-card h3 { font-size: 1.05rem; font-weight: 800; margin-bottom: 10px; line-height: 1.4; }
.scenario-card p { font-size: 0.85rem; color: var(--text-secondary); line-height: 1.7; margin-bottom: 14px; }
.sc-tag {
    font-size: 0.75rem; font-weight: 700; color: var(--primary-dark);
    background: var(--primary-glow); padding: 5px 14px;
    border-radius: 20px; display: inline-block;
}

/* NODES */
.nodes { background: var(--bg-card); }
.nodes-grid {
    display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; margin-bottom: 28px;
}
.node-region {
    background: var(--bg-section); border: 1px solid var(--border);
    border-radius: var(--radius); padding: 20px;
    text-align: center; transition: all 0.2s;
}
.node-region:hover { border-color: var(--primary); background: rgba(34,197,94,0.05); }
.nr-title { font-weight: 800; font-size: 0.95rem; color: var(--text); margin-bottom: 8px; }
.nr-list { font-size: 0.8rem; color: var(--text-secondary); line-height: 1.5; }
.nodes-note { text-align: center; font-size: 0.85rem; color: var(--text-muted); }

/* TECH */
.tech { background: var(--bg-section); }
.tech-grid {
    display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px;
}
.tech-card {
    background: var(--bg-card); border: 1px solid var(--border);
    border-radius: var(--radius-xl); padding: 30px;
    transition: all 0.3s; box-shadow: var(--shadow-sm);
}
.tech-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-green); border-color: rgba(34,197,94,0.3); }
.tc-icon { font-size: 2rem; margin-bottom: 14px; }
.tech-card h3 { font-size: 1.05rem; font-weight: 800; margin-bottom: 8px; }
.tech-card p { font-size: 0.85rem; color: var(--text-secondary); line-height: 1.7; }

/* SOCIAL PROOF */
.social-proof { background: var(--bg-card); }
.client-grid {
    display: grid; grid-template-columns: repeat(6, 1fr); gap: 14px; margin-bottom: 28px;
}
.client-item {
    background: var(--bg-section); border: 1px solid var(--border);
    border-radius: var(--radius); padding: 18px;
    text-align: center; font-size: 0.8rem; font-weight: 700;
    color: var(--text-secondary); transition: all 0.2s;
}
.client-item:hover { border-color: var(--primary); color: var(--primary-dark); background: rgba(34,197,94,0.05); }
.cert-row {
    display: flex; justify-content: center; gap: 24px; flex-wrap: wrap; margin-bottom: 48px;
}
.cert-row span { font-size: 0.8rem; color: var(--text-muted); font-weight: 500; }

.testimonial {
    background: linear-gradient(160deg, #F0FDF4, rgba(34,197,94,0.06));
    border: 1px solid rgba(34,197,94,0.2); border-radius: 28px;
    padding: 44px 52px; text-align: center; position: relative;
}
.quote-mark {
    font-size: 5rem; color: var(--primary); line-height: 1;
    font-family: Georgia, serif; opacity: 0.2;
    position: absolute; top: 16px; left: 44px;
}
.quote-text {
    font-size: 1.15rem; color: var(--text); line-height: 1.8;
    font-weight: 500; max-width: 700px; margin: 0 auto 16px;
}
.quote-author { font-size: 0.85rem; color: var(--text-secondary); font-weight: 600; }

/* PRICING */
.pricing { background: var(--bg-section); }
.pricing-grid {
    display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; margin-bottom: 32px;
}
.pricing-card {
    background: var(--bg-card); border: 1px solid var(--border);
    border-radius: 28px; padding: 38px 30px;
    position: relative; transition: all 0.3s; box-shadow: var(--shadow-sm);
}
.pricing-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.pricing-card.popular { border-color: var(--primary); box-shadow: var(--shadow-green); }

.pc-badge {
    display: inline-block; font-size: 0.75rem; font-weight: 800;
    color: var(--text-muted); background: var(--bg-section);
    padding: 5px 14px; border-radius: 20px; margin-bottom: 16px;
}
.pc-badge.hot { color: #EA580C; background: #FFF7ED; }
.pricing-card h3 { font-size: 1.15rem; font-weight: 800; margin-bottom: 16px; }
.pc-price { margin-bottom: 12px; }
.pc-amount { font-size: 2.6rem; font-weight: 900; color: var(--text); font-family: 'Inter', sans-serif; letter-spacing: -0.04em; }
.pc-period { font-size: 1rem; color: var(--text-muted); font-weight: 500; }
.pc-desc {
    font-size: 0.85rem; color: var(--text-secondary); line-height: 1.7;
    margin-bottom: 24px; padding-bottom: 24px; border-bottom: 1px solid var(--border-light);
}
.pc-features { display: flex; flex-direction: column; gap: 10px; margin-bottom: 28px; }
.pc-features > div { font-size: 0.875rem; color: var(--text-secondary); }
.pricing-card .btn-primary, .pricing-card .btn-outline { width: 100%; justify-content: center; }
.pricing-card.popular::before {
    content: '推荐'; position: absolute; top: -1px; right: 28px;
    background: var(--primary); color: #fff;
    font-size: 0.7rem; font-weight: 800; padding: 5px 18px;
    border-radius: 0 0 10px 10px; letter-spacing: 0.05em;
}
.pricing-note { text-align: center; font-size: 0.85rem; color: var(--text-muted); }

/* FAQ */
.faq { background: var(--bg-card); }
.faq-list { max-width: 760px; margin: 0 auto; display: flex; flex-direction: column; gap: 12px; }
.faq-item {
    background: var(--bg-card); border: 1px solid var(--border);
    border-radius: var(--radius-lg); overflow: hidden; transition: all 0.3s;
    box-shadow: var(--shadow-sm);
}
.faq-item:hover, .faq-item.open { border-color: var(--primary); box-shadow: var(--shadow-green); }
.faq-q {
    display: flex; justify-content: space-between; align-items: center;
    padding: 20px 26px; font-weight: 700; font-size: 0.95rem; cursor: pointer; gap: 16px;
}
.faq-q svg { flex-shrink: 0; color: var(--text-muted); transition: transform 0.3s; }
.faq-item.open .faq-q svg { transform: rotate(45deg); }
.faq-a {
    max-height: 0; overflow: hidden; transition: all 0.3s;
    font-size: 0.9rem; color: var(--text-secondary); line-height: 1.7; padding: 0 26px;
}
.faq-item.open .faq-a { max-height: 200px; padding: 0 26px 20px; }

/* FOOTER */
.footer { background: var(--bg); border-top: 1px solid var(--border); padding: 80px 0 40px; }
.footer-cta { text-align: center; margin-bottom: 64px; }
.footer-cta h2 { font-size: 2rem; font-weight: 800; margin-bottom: 12px; }
.footer-cta p { font-size: 1rem; color: var(--text-secondary); margin-bottom: 28px; }
.footer-links {
    display: grid; grid-template-columns: repeat(4, 1fr);
    gap: 32px; margin-bottom: 48px;
}
.fl-col { display: flex; flex-direction: column; gap: 10px; }
.fl-title { font-weight: 800; font-size: 0.85rem; color: var(--text); margin-bottom: 8px; }
.fl-col a { text-decoration: none; font-size: 0.85rem; color: var(--text-secondary); transition: color 0.2s; }
.fl-col a:hover { color: var(--primary); }
.footer-bottom {
    border-top: 1px solid var(--border); padding-top: 24px;
    display: flex; justify-content: space-between; align-items: center;
    font-size: 0.8rem; color: var(--text-muted);
}
.footer-bottom a { color: var(--text-muted); text-decoration: none; }
.footer-bottom a:hover { color: var(--primary); }

/* RESPONSIVE */
@media (max-width: 1024px) {
    .hero-stats { padding: 16px 20px; }
    .stat-item { padding: 0 12px; }
    .scenario-grid { grid-template-columns: repeat(2, 1fr); }
    .pricing-grid { grid-template-columns: 1fr; max-width: 480px; margin: 0 auto 32px; }
    .footer-links { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 768px) {
    :root { --nav-h: 64px; }
    .hero-title { font-size: 2.5rem; }
    .hero-stats { flex-wrap: wrap; gap: 8px; }
    .section { padding: 64px 0; }
    .section-header h2 { font-size: 1.8rem; }
    .comp-header, .comp-row { padding: 14px 18px; font-size: 0.8rem; }
    .scenario-grid { grid-template-columns: 1fr; }
    .tech-grid { grid-template-columns: 1fr; }
    .client-grid { grid-template-columns: repeat(2, 1fr); }
    .nav-links { display: none; }
    .cert-row { flex-direction: column; gap: 10px; align-items: center; }
    .footer-links { grid-template-columns: repeat(2, 1fr); }
    .footer-bottom { flex-direction: column; gap: 8px; text-align: center; }
}