/* ===== Hero 区域 ===== */
.hero { text-align: center; }
.hero-badge { display: inline-flex; align-items: center; gap: 8px; padding: 8px 24px; background: rgba(255,255,255,0.12); backdrop-filter: blur(10px); border: 1px solid rgba(255,255,255,0.18); border-radius: 50px; font-size: 14px; font-weight: 500; margin-bottom: 28px; letter-spacing: 0.03em; position: relative; }
.hero-title { font-size: 42px; font-weight: 800; line-height: 1.25; margin-bottom: 18px; position: relative; letter-spacing: -0.02em; }
.hero-subtitle { margin: 0 auto 36px;}
.hero-join { display: flex; justify-content: center; gap: 48px; flex-wrap: wrap; flex-direction: row; position: relative; }
.hero-stat { text-align: center; }
.hero-stat-num { font-size: 32px; font-weight: 800; line-height: 1.2; }
.hero-stat-label { font-size: 13px; opacity: 0.75; margin-top: 4px; }

/* ===== 区块标题 ===== */
.section-tag { padding: 5px 16px; background: #EFF6FF; color: #2563EB; font-size: 12px; }
.section-title { font-size: 30px; font-weight: 800; color: #0F172A; letter-spacing: -0.02em;}
.section-desc { font-size: 16px; color: #64748B; max-width: 600px; margin: 0 auto; line-height: 1.7; }

/* ===== 合作对象 - 四大角色 ===== */
.roles-section { padding-bottom: 60px; }
.role-tabs { display: flex; justify-content: center; gap: 10px; flex-wrap: wrap; margin-bottom: 40px; }
.role-tab { padding: 12px 28px; border-radius: 50px; font-size: 14px; font-weight: 600; cursor: pointer; transition: all 0.3s; border: 2px solid transparent; background: white; color: #475569; box-shadow: 0 2px 8px rgba(0,0,0,0.06); }
.role-tab:hover { border-color: #BFDBFE; color: #1E3A8A; }
.role-tab.active { background: linear-gradient(135deg, #1E3A8A, #2563EB); color: white; box-shadow: 0 4px 16px rgba(30,58,138,0.3); }

/* 角色详情面板 */
.role-panel { display: none; animation: fadeInUp 0.5s ease; }
.role-panel.active { display: block; }
@keyframes fadeInUp { from { opacity: 0; transform: translateY(20px); } to { opacity: 1; transform: translateY(0); } }

.role-hero { background: linear-gradient(135deg, var(--role-color-1), var(--role-color-2)); color: white; border-radius: 20px; padding: 42px 44px; margin-bottom: 28px; position: relative; overflow: hidden; }
.role-hero::after { content: ''; position: absolute; top: -60px; right: -40px; width: 280px; height: 280px; background: rgba(255,255,255,0.07); border-radius: 50%; }
.role-hero-tag { display: inline-flex; align-items: center; gap: 6px; padding: 5px 16px; background: rgba(255,255,255,0.18); border-radius: 50px; font-size: 12px; font-weight: 600; margin-bottom: 16px; backdrop-filter: blur(6px); }
.role-hero-title { font-size: 26px; font-weight: 800; margin-bottom: 10px; position: relative; }
.role-hero-slogan { font-size: 15px; opacity: 0.9; line-height: 1.7; max-width: 600px; position: relative; }

/* 角色内容三栏布局 */
.role-content { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 20px; margin-bottom: 28px; }
@media (max-width: 900px) { .role-content { grid-template-columns: 1fr; } }

.role-block { background: white; border-radius: 16px; padding: 28px 26px; box-shadow: 0 2px 12px rgba(0,0,0,0.04); border: 1px solid #E2E8F0; transition: all 0.3s; }
.role-block:hover { box-shadow: 0 6px 20px rgba(0,0,0,0.08); }
.role-block-header { display: flex; align-items: center; gap: 10px; margin-bottom: 18px; padding-bottom: 14px; border-bottom: 2px solid #F1F5F9; }
.role-block-icon { font-size: 22px; }
.role-block-title { font-size: 16px; font-weight: 700; color: #0F172A; }
.role-block-list { list-style: none; }
.role-block-list li { padding: 5px 0; font-size: 14px; color: #334155; line-height: 1.7; position: relative; padding-left: 15px; }
.role-block-list li strong{display: block; width: 100%; }
.role-block-list li::before { content: '✦'; color: var(--accent-color); font-size: 11px; margin-top: 5px; position: absolute; left: 0; }

/* 合作模式卡片 */
.coop-mode { background: linear-gradient(135deg, #FFFBEB, #FEF3C7); border-radius: 16px; padding: 32px 34px; border: 1px solid #FDE68A; margin-bottom: 28px; }
.coop-mode-header { display: flex; align-items: center; gap: 12px; margin-bottom: 20px; }
.coop-mode-icon { font-size: 26px; }
.coop-mode-title { font-size: 18px; font-weight: 700; color: #92400E; }
.coop-mode-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 16px; }
.coop-item { background: white; border-radius: 12px; padding: 20px; border: 1px solid #FDE68A; }
.coop-item-name { font-size: 15px; font-weight: 700; color: #78350F; margin-bottom: 8px; }
.coop-item-detail { font-size: 13px; color: #92400E; line-height: 1.75; }

/* 成长路线图 */
.roadmap { background: white; border-radius: 16px; padding: 32px 34px; box-shadow: 0 2px 12px rgba(0,0,0,0.04); border: 1px solid #E2E8F0; margin-bottom: 28px; }
.roadmap-header { display: flex; align-items: center; gap: 12px; margin-bottom: 26px; }
.roadmap-title { font-size: 18px; font-weight: 700; color: #0F172A; }
.roadmap-steps { display: flex; align-items: flex-start; gap: 0; position: relative; padding: 10px 0; }
.roadmap-steps::before { content: ''; position: absolute; top: 28px; left: 40px; right: 40px; height: 3px; background: linear-gradient(to right, #DBEAFE, #93C5FD, #3B82F6); border-radius: 2px; }
.roadmap-step { flex: 1; text-align: center; position: relative; z-index: 1; }
.roadmap-step-num { width: 56px; height: 56px; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-size: 18px; font-weight: 800; color: white; margin: 0 auto 12px; background: linear-gradient(135deg, #1E3A8A, #2563EB); box-shadow: 0 4px 12px rgba(37,99,235,0.3); }
.roadmap-step-label { font-size: 14px; font-weight: 700; color: #0F172A; margin-bottom: 4px; }
.roadmap-step-desc { font-size: 12px; color: #64748B; line-height: 1.6; padding: 0 4px; }

/* CTA 按钮 */
.cta-row { text-align: center; padding: 20px 0 40px; }
.cta-btn { display: inline-flex; align-items: center; gap: 10px; padding: 16px 40px; background: linear-gradient(135deg, #1E3A8A, #2563EB); color: white; border-radius: 12px; font-size: 17px; font-weight: 700; text-decoration: none; transition: all 0.3s; box-shadow: 0 6px 24px rgba(30,58,138,0.35); cursor: pointer; border: none; }
.cta-btn:hover { transform: translateY(-2px);color: #fff; box-shadow: 0 10px 32px rgba(30,58,138,0.45); }
.cta-btn-secondary { display: inline-flex; align-items: center; gap: 8px; padding: 14px 32px; background: white; color: #1E3A8A; border-radius: 12px; font-size: 15px; font-weight: 600; text-decoration: none; border: 2px solid #E2E8F0; margin-left: 16px; transition: all 0.3s; }
.cta-btn-secondary:hover { border-color: #93C5FD; background: #EFF6FF; }

/* ===== 为什么选择我们 ===== */
.why-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; margin-top: 10px; }
.why-card { background: white; border-radius: 16px; padding: 30px 28px; box-shadow: 0 2px 12px rgba(0,0,0,0.04); border: 1px solid #E2E8F0; display: flex; gap: 18px; transition: all 0.3s; }
.why-card:hover { transform: translateY(-3px); box-shadow: 0 8px 24px rgba(0,0,0,0.08); }
.why-icon { font-size: 38px; flex-shrink: 0; width: 56px; text-align: center; }
.why-body h3 { font-size: 17px; font-weight: 700; color: #0F172A; margin-bottom: 8px; }
.why-body p { font-size: 14px; color: #64748B; line-height: 1.75; }

/* ===== 数据展示 ===== */
.data-showcase { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; margin-top: 10px; }
.data-item { background: linear-gradient(135deg, #1E3A8A, #2563EB); color: white; border-radius: 16px; padding: 28px 20px; text-align: center; transition: transform 0.3s; }
.data-item:hover { transform: scale(1.03); }
.data-item-num { font-size: 36px; font-weight: 800; line-height: 1.2; }
.data-item-unit { font-size: 16px; font-weight: 600; opacity: 0.85; }
.data-item-label { font-size: 13px; opacity: 0.85; margin-top: 6px; line-height: 1.5; }

/* ===== FAQ ===== */
.faq-section { padding-bottom: 72px; }
.faq-list { max-width: 800px; margin: 0 auto; }
.faq-item { background: white; border-radius: 12px; margin-bottom: 12px; box-shadow: 0 1px 6px rgba(0,0,0,0.04); border: 1px solid #E2E8F0; overflow: hidden; }
.faq-q { display: flex; align-items: center; justify-content: space-between; padding: 20px 24px; cursor: pointer; user-select: none; transition: background 0.2s; }
.faq-q:hover { background: #F8FAFC; }
.faq-q-text { font-size: 15px; font-weight: 600; color: #0F172A; display: flex; align-items: center; gap: 10px; }
.faq-q-icon { font-size: 18px; color: #2563EB; }
.faq-arrow { font-size: 12px; color: #94A3B8; transition: transform 0.3s; }
.faq-arrow.open { transform: rotate(180deg); }
/* ===== 联系我们 CTA ===== */
.contact-cta { background: linear-gradient(135deg, #0F172A 0%, #1E3A8A 60%, #2563EB 100%); color: white; border-radius: 24px; padding: 64px 48px; text-align: center; position: relative; overflow: hidden; margin: 40px 0 60px; }
.contact-cta::before { content: ''; position: absolute; top: -120px; right: -80px; width: 400px; height: 400px; background: radial-gradient(circle, rgba(59,130,246,0.12) 0%, transparent 70%); border-radius: 50%; }
.contact-cta::after { content: ''; position: absolute; bottom: -80px; left: -60px; width: 300px; height: 300px; background: radial-gradient(circle, rgba(255,255,255,0.04) 0%, transparent 70%); border-radius: 50%; }
.contact-cta-title { font-size: 32px; font-weight: 800; margin-bottom: 12px; position: relative; }
.contact-cta-desc { font-size: 16px; opacity: 0.88; line-height: 1.7; margin: 0 auto 32px; position: relative; }
.contact-channels { display: flex; justify-content: center; gap: 20px; flex-wrap: wrap; position: relative; }
.contact-channel { display: flex; cursor: pointer; align-items: center; gap: 10px; padding: 14px 28px; background: rgba(255,255,255,0.12); border: 1px solid rgba(255,255,255,0.18); border-radius: 12px; font-size: 14px; font-weight: 600; backdrop-filter: blur(8px); transition: all 0.3s; text-decoration: none; color: white; }
.contact-channel:hover { background: rgba(255,255,255,0.2); color: #fff; transform: translateY(-2px); }

/* ===== 响应式 ===== */
@media (max-width: 900px) {
    .hero-title { font-size: 30px; }
    .role-content { grid-template-columns: 1fr; }
    .why-grid { grid-template-columns: 1fr; }
    .roadmap-steps { flex-direction: column; align-items: center; gap: 16px; }
    .roadmap-steps::before { display: none; }
    .nav-links { display: none; }
    .section-title { font-size: 24px; }
    .contact-cta { padding: 40px 24px; }
    .contact-cta-title { font-size: 24px; }
}
@media (max-width: 576px) {
    .hero-stats { gap: 24px; }
}