/* ===== CSS变量 ===== */
:root {
  --blue: #1A56DB;
  --blue-dark: #1341B0;
  --blue-light: #3B82F6;
  --cyan: #06B6D4;
  --dark: #0F172A;
  --dark2: #1E293B;
  --gray: #64748B;
  --gray-light: #94A3B8;
  --light: #F1F5F9;
  --white: #FFFFFF;
  --border: #E2E8F0;
  --gradient: linear-gradient(135deg, #1A56DB 0%, #06B6D4 100%);
  --gradient2: linear-gradient(135deg, #0F172A 0%, #1A56DB 100%);
  --shadow: 0 4px 24px rgba(26,86,219,0.12);
  --shadow-lg: 0 12px 48px rgba(26,86,219,0.18);
  --radius: 12px;
  --radius-lg: 20px;
}

/* ===== 重置 ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body { font-family: -apple-system, BlinkMacSystemFont, 'PingFang SC', 'Microsoft YaHei', sans-serif; color: var(--dark); background: var(--white); line-height: 1.6; overflow-x: hidden; }
a { text-decoration: none; color: inherit; }
ul { list-style: none; }
img { max-width: 100%; }

/* ===== 容器 ===== */
.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }

/* ===== 按钮 ===== */
.btn { display: inline-flex; align-items: center; gap: 8px; padding: 12px 28px; border-radius: 50px; font-size: 15px; font-weight: 600; cursor: pointer; border: none; transition: all .3s; }
.btn-sm { padding: 9px 20px; font-size: 14px; }
.btn-lg { padding: 16px 40px; font-size: 17px; }
.btn-full { width: 100%; justify-content: center; }
.btn-primary { background: var(--gradient); color: var(--white); box-shadow: 0 4px 20px rgba(26,86,219,.35); }
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 32px rgba(26,86,219,.45); }
.btn-outline { background: transparent; color: var(--blue); border: 2px solid var(--blue); }
.btn-outline:hover { background: var(--blue); color: var(--white); }
.btn-outline-white { background: transparent; color: var(--white); border: 2px solid rgba(255,255,255,.5); }
.btn-outline-white:hover { background: rgba(255,255,255,.15); border-color: var(--white); }

/* ===== 导航 ===== */
.navbar { position: fixed; top: 0; left: 0; right: 0; z-index: 1000; background: rgba(255,255,255,.96); backdrop-filter: blur(12px); border-bottom: 1px solid var(--border); transition: all .3s; }
.navbar.scrolled { box-shadow: 0 4px 24px rgba(0,0,0,.08); }
.nav-inner { display: flex; align-items: center; height: 68px; gap: 32px; }
.logo { display: flex; align-items: center; gap: 8px; font-size: 22px; font-weight: 800; letter-spacing: -0.5px; }
.logo-dot { width: 10px; height: 10px; background: var(--gradient); border-radius: 50%; }
.logo em { background: var(--gradient); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; font-style: normal; }
.nav-links { display: flex; align-items: center; gap: 28px; flex: 1; }
.nav-links a { font-size: 18px; font-weight: 500; color: var(--gray); transition: color .2s; white-space: nowrap; }
.nav-links a:hover { color: var(--blue); }
.nav-cta { margin-left: auto; white-space: nowrap; }
.hamburger { display: none; background: none; border: none; font-size: 26px; cursor: pointer; color: var(--dark); margin-left: auto; }

/* ===== HERO ===== */
.hero { min-height: 100vh; display: flex; align-items: center; position: relative; padding-top: 68px; overflow: hidden; background: linear-gradient(160deg, #F8FAFF 0%, #EEF4FF 50%, #F0FFFE 100%); }
.hero-bg-grid { position: absolute; inset: 0; background-image: linear-gradient(rgba(26,86,219,.04) 1px, transparent 1px), linear-gradient(90deg, rgba(26,86,219,.04) 1px, transparent 1px); background-size: 60px 60px; }
.hero-particles { position: absolute; inset: 0; pointer-events: none; }
.particle { position: absolute; border-radius: 50%; background: var(--gradient); opacity: .15; animation: float linear infinite; }
.hero-content { position: relative; text-align: center; padding: 80px 0; max-width: 900px; margin: 0 auto; }
.hero-badge { display: inline-flex; align-items: center; gap: 8px; background: rgba(26,86,219,.08); color: var(--blue); padding: 8px 20px; border-radius: 50px; font-size: 14px; font-weight: 600; margin-bottom: 28px; border: 1px solid rgba(26,86,219,.15); }
.hero h1 { font-size: clamp(2rem, 5vw, 3.5rem); font-weight: 800; line-height: 1.2; margin-bottom: 24px; color: var(--dark); }
.highlight { background: var(--gradient); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.hero-sub { font-size: clamp(1rem, 2vw, 1.2rem); color: var(--gray); margin-bottom: 40px; letter-spacing: 1px; }
.hero-btns { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; margin-bottom: 64px; }
.hero-stats { display: flex; justify-content: center; align-items: center; gap: 0; flex-wrap: wrap; background: var(--white); border-radius: var(--radius-lg); padding: 28px 40px; box-shadow: var(--shadow-lg); border: 1px solid var(--border); }
.stat { text-align: center; padding: 0 32px; }
.stat .num { font-size: 2.5rem; font-weight: 800; background: var(--gradient); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.stat em { font-size: 1.5rem; font-weight: 700; background: var(--gradient); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; font-style: normal; }
.stat p { font-size: 13px; color: var(--gray); margin-top: 4px; }
.stat-divider { width: 1px; height: 50px; background: var(--border); }
.hero-scroll { position: absolute; bottom: 32px; left: 50%; transform: translateX(-50%); text-align: center; cursor: pointer; color: var(--gray-light); font-size: 12px; }
.scroll-arrow { width: 20px; height: 20px; border-right: 2px solid var(--gray-light); border-bottom: 2px solid var(--gray-light); transform: rotate(45deg); margin: 8px auto 0; animation: bounce .8s ease-in-out infinite alternate; }
@keyframes bounce { from { transform: rotate(45deg) translateY(0); } to { transform: rotate(45deg) translateY(6px); } }
@keyframes float { 0% { transform: translateY(100vh) scale(0); opacity: 0; } 10% { opacity: .15; } 90% { opacity: .15; } 100% { transform: translateY(-100px) scale(1); opacity: 0; } }

/* ===== 通用 Section ===== */
.section { padding: 100px 0; }
.bg-light { background: var(--light); }
.bg-dark { background: var(--gradient2); }
.section-tag { font-size: 12px; font-weight: 700; letter-spacing: 3px; color: var(--blue); text-transform: uppercase; margin-bottom: 12px; }
.section-tag.light { color: rgba(255,255,255,.6); }
.section-title { font-size: clamp(1.75rem, 3vw, 2.5rem); font-weight: 800; margin-bottom: 16px; }
.section-title.light { color: var(--white); }
.section-sub { font-size: 1.1rem; color: var(--gray); max-width: 600px; margin-bottom: 30px;}
.section-header { margin-bottom: 60px; }

/* ===== 关于我们 ===== */
.about-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: start; }
.about-text p { color: var(--gray); line-height: 1.8; margin-bottom: 16px; font-size: 1.05rem; }
.about-text strong { color: var(--dark); }
.about-tags { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 24px; }
.about-tags span { background: rgba(26,86,219,.07); color: var(--blue); padding: 7px 16px; border-radius: 50px; font-size: 14px; font-weight: 500; border: 1px solid rgba(26,86,219,.12); }
.about-cards { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.about-card { background: var(--white); padding: 28px 24px; border-radius: var(--radius); box-shadow: var(--shadow); border: 1px solid var(--border); transition: all .3s; }
.about-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.about-icon { font-size: 36px; margin-bottom: 12px; }
.about-card h4 { font-size: 1rem; font-weight: 700; margin-bottom: 8px; }
.about-card p { font-size: 14px; color: var(--gray); line-height: 1.6; }

/* ===== 核心业务 ===== */
.services-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(340px, 1fr)); gap: 24px; }
.service-card { background: var(--white); padding: 36px 28px; border-radius: var(--radius-lg); box-shadow: 0 2px 16px rgba(0,0,0,.05); border: 1px solid var(--border); transition: all .3s; position: relative; overflow: hidden; }
.service-card::before { content: ''; position: absolute; top: 0; left: 0; right: 0; height: 3px; background: var(--gradient); transform: scaleX(0); transition: transform .3s; }
.service-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); border-color: rgba(26,86,219,.2); }
.service-card:hover::before { transform: scaleX(1); }
.service-icon { font-size: 44px; margin-bottom: 16px; }
.service-card h3 { font-size: 1.1rem; font-weight: 700; margin-bottom: 12px; color: var(--dark); }
.service-card p { font-size: 14px; color: var(--gray); line-height: 1.7; margin-bottom: 16px; }
.service-card ul { margin-bottom: 20px; }
.service-card ul li { font-size: 13px; color: var(--gray); padding: 4px 0; padding-left: 16px; position: relative; }
.service-card ul li::before { content: '▸'; position: absolute; left: 0; color: var(--blue); }
.service-link { font-size: 14px; font-weight: 600; color: var(--blue); transition: gap .2s; display: inline-flex; align-items: center; gap: 4px; }
.service-link:hover { gap: 8px; }

/* ===== 服务优势 ===== */
.adv-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.adv-item { background: var(--white); padding: 32px 24px; border-radius: var(--radius); border: 1px solid var(--border); position: relative; transition: all .3s; }
.adv-item:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); border-color: rgba(26,86,219,.2); }
.adv-num { position: absolute; top: 16px; right: 20px; font-size: 36px; font-weight: 900; color: rgba(26,86,219,.06); line-height: 1; }
.adv-icon { font-size: 36px; margin-bottom: 12px; }
.adv-item h4 { font-size: 1rem; font-weight: 700; margin-bottom: 10px; }
.adv-item p { font-size: 13px; color: var(--gray); line-height: 1.7; }

/* ===== 成功案例 ===== */
.cases-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.case-card { background: var(--white); padding: 36px 32px; border-radius: var(--radius-lg); border: 1px solid var(--border); box-shadow: 0 2px 16px rgba(0,0,0,.05); transition: all .3s; }
.case-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.case-card.featured { background: var(--gradient); color: var(--white); grid-column: span 2; }
.case-industry { font-size: 12px; font-weight: 700; letter-spacing: 2px; text-transform: uppercase; color: var(--blue); margin-bottom: 12px; }
.case-card.featured .case-industry { color: rgba(255,255,255,.7); }
.case-card h3 { font-size: 1.3rem; font-weight: 700; margin-bottom: 12px; }
.case-card p { font-size: 14px; color: var(--gray); line-height: 1.7; margin-bottom: 24px; }
.case-card.featured p { color: rgba(255,255,255,.85); }
.case-metrics { display: flex; gap: 32px; margin-bottom: 24px; }
.metric { text-align: center; }
.metric-val { font-size: 1.8rem; font-weight: 800; color: var(--blue); display: block; }
.case-card.featured .metric-val { color: var(--white); }
.metric p { font-size: 12px; color: var(--gray); margin-top: 4px; }
.case-card.featured .metric p { color: rgba(255,255,255,.7); }
blockquote { font-size: 14px; font-style: italic; color: var(--gray); border-left: 3px solid var(--blue); padding-left: 16px; margin-bottom: 12px; line-height: 1.7; }
.case-card.featured blockquote { color: rgba(255,255,255,.9); border-color: rgba(255,255,255,.5); }
.case-client { font-size: 13px; color: var(--gray-light); font-weight: 500; }
.case-card.featured .case-client { color: rgba(255,255,255,.6); }

/* ===== 合作流程 ===== */
.process-steps { display: flex; align-items: flex-start; justify-content: center; gap: 0; flex-wrap: wrap; margin-bottom: 60px; }
.step { text-align: center; flex: 1; min-width: 140px; max-width: 180px; padding: 0 8px; }
.step-num { font-size: 11px; font-weight: 700; color: var(--blue); letter-spacing: 1px; margin-bottom: 12px; }
.step-icon { width: 72px; height: 72px; background: linear-gradient(135deg, rgba(26,86,219,.1), rgba(6,182,212,.1)); border-radius: 50%; display: flex; align-items: center; justify-content: center; font-size: 32px; margin: 0 auto 16px; border: 2px solid rgba(26,86,219,.15); transition: all .3s; }
.step:hover .step-icon { background: var(--gradient); transform: scale(1.1); }
.step h4 { font-size: 15px; font-weight: 700; margin-bottom: 8px; }
.step p { font-size: 13px; color: var(--gray); line-height: 1.6; }
.step-arrow { font-size: 24px; color: var(--blue-light); padding-top: 36px; flex-shrink: 0; opacity: .5; }
.process-cta { text-align: center; }

/* ===== 渠道招商 ===== */
.join .section-title, .join .section-sub { color: var(--white); }
.join-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.join-card { background: rgba(255,255,255,.07); border: 1px solid rgba(255,255,255,.15); border-radius: var(--radius-lg); padding: 40px 32px; text-align: center; color: var(--white); position: relative; transition: all .3s; }
.join-card:hover { background: rgba(255,255,255,.12); transform: translateY(-4px); }
.join-card.featured { background: rgba(255,255,255,.15); border-color: rgba(255,255,255,.4); transform: scale(1.03); }
.join-badge { position: absolute; top: -12px; left: 50%; transform: translateX(-50%); background: var(--gradient); color: var(--white); padding: 4px 20px; border-radius: 50px; font-size: 12px; font-weight: 700; white-space: nowrap; }
.join-icon { font-size: 48px; margin-bottom: 16px; }
.join-card h3 { font-size: 1.3rem; font-weight: 700; margin-bottom: 8px; }
.join-price { font-size: 14px; color: rgba(255,255,255,.6); margin-bottom: 24px; }
.join-card ul { text-align: left; margin-bottom: 32px; }
.join-card ul li { font-size: 14px; padding: 8px 0; border-bottom: 1px solid rgba(255,255,255,.08); color: rgba(255,255,255,.85); }

/* ===== 联系我们 ===== */
/* .contact-wrap { display: grid; grid-template-columns: 1fr 1.4fr; gap: 60px; align-items: start; } */
.contact-info h3 { font-size: 1.5rem; font-weight: 700; margin-bottom: 12px; }
.contact-info > p { color: var(--gray); margin-bottom: 32px; line-height: 1.7; }
.contact-items { display: flex; flex-direction: column; gap: 20px; margin-bottom: 32px; }
.ci { display: flex; gap: 16px; align-items: flex-start; }
.ci-icon { width: 48px; height: 48px; background: rgba(26,86,219,.08); border-radius: var(--radius); display: flex; align-items: center; justify-content: center; font-size: 22px; flex-shrink: 0; }
.ci strong { display: block; font-weight: 600; margin-bottom: 2px; }
.ci p { font-size: 14px; color: var(--gray); }
.qr-placeholder { display: flex; flex-direction: column;     align-items: center; gap: 8px; }
.qr-box { width: 200px; height: 200px; background: var(--light); border-radius: var(--radius); border: 2px dashed var(--border); display: flex; align-items: center; justify-content: center; }
.qr-inner { font-size: 12px; color: var(--gray); text-align: center; line-height: 1.5; }
.qr-placeholder p { font-size: 20px; color: var(--gray); }
.contact-form { background: var(--light); padding: 40px; border-radius: var(--radius-lg); }
.contact-form h3 { font-size: 1.3rem; font-weight: 700; margin-bottom: 24px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-group { margin-bottom: 16px; }
.form-group label { display: block; font-size: 13px; font-weight: 600; color: var(--dark); margin-bottom: 6px; }
.form-group input, .form-group select, .form-group textarea { width: 100%; padding: 13px 16px; border: 1.5px solid var(--border); border-radius: var(--radius); font-size: 14px; background: var(--white); font-family: inherit; transition: all .2s; color: var(--dark); }
.form-group input:focus, .form-group select:focus, .form-group textarea:focus { outline: none; border-color: var(--blue); box-shadow: 0 0 0 3px rgba(26,86,219,.1); }
.form-group textarea { resize: vertical; }
.form-tip { font-size: 12px; color: var(--gray-light); text-align: center; margin-top: 12px; }
.contact-info-lx{display: grid;
    justify-items: stretch;
    justify-content: space-between;
    grid-template-columns: 1fr 1.4fr;
    gap: 60px;
    align-items: start;}




/* ===== 页脚 ===== */
.footer { background: var(--dark); color: var(--white); padding: 60px 0 28px; }
.footer-top { display: grid; grid-template-columns: 1fr 2fr; gap: 60px; margin-bottom: 48px; }
.footer-brand .logo { margin-bottom: 16px; }
.footer-brand p { font-size: 14px; color: rgba(255,255,255,.5); line-height: 1.8; }
.footer-links { display: grid; grid-template-columns: repeat(4, 1fr); gap: 10px; }
.fl-col h5 { font-size: 14px; font-weight: 700; margin-bottom: 16px; color: rgba(255,255,255,.9); }
.fl-col a { display: block; font-size: 13px; color: rgba(255,255,255,.5); padding: 5px 0; transition: color .2s; }
.fl-col a:hover { color: var(--white); }
.footer-bottom { padding-top: 24px; border-top: 1px solid rgba(255,255,255,.08); display: flex; justify-content: space-between; align-items: center; }
.footer-bottom p { font-size: 13px; color: rgba(255,255,255,.4); }
.footer-legal { display: flex; gap: 24px; }
.footer-legal a { font-size: 13px; color: rgba(255,255,255,.4); transition: color .2s; }
.footer-legal a:hover { color: var(--white); }

/* ===== 悬浮按钮 ===== */
.float-btns { position: fixed; right: 24px; bottom: 40px; display: flex; flex-direction: column; gap: 12px; z-index: 999; }
.float-btn { width: 48px; height: 48px; background: var(--gradient); color: var(--white); border-radius: 50%; display: flex; align-items: center; justify-content: center; font-size: 20px; box-shadow: 0 4px 16px rgba(26,86,219,.35); transition: all .3s; }
.float-btn:hover { transform: scale(1.1); box-shadow: 0 8px 24px rgba(26,86,219,.45); }
#backTop { opacity: 0; pointer-events: none; transition: opacity .3s; }
#backTop.show { opacity: 1; pointer-events: all; }

/* ===== 动画 ===== */
.fade-up { opacity: 0; transform: translateY(30px); transition: opacity .6s ease, transform .6s ease; }
.fade-up.visible { opacity: 1; transform: translateY(0); }

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
  .adv-grid { grid-template-columns: repeat(2, 1fr); }
  .about-grid { grid-template-columns: 1fr; }
  .contact-wrap { grid-template-columns: 1fr; }
  .footer-top { grid-template-columns: 1fr; gap: 40px; }
  .footer-links { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 768px) {
  .nav-links { display: none; position: fixed; top: 68px; left: 0; right: 0; background: var(--white); flex-direction: column; padding: 20px 24px; gap: 16px; box-shadow: 0 8px 32px rgba(0,0,0,.1); border-top: 1px solid var(--border); }
  .nav-links.open { display: flex; }
  .nav-cta { display: none; }
  .hamburger { display: block; }
  .hero-stats { padding: 20px 16px; gap: 0; }
  .stat { padding: 0 16px; }
  .stat .num { font-size: 1.8rem; }
  .stat-divider { height: 36px; }
  .services-grid { grid-template-columns: 1fr; }
  .cases-grid { grid-template-columns: 1fr; }
  .case-card.featured { grid-column: span 1; }
  .join-grid { grid-template-columns: 1fr; }
  .join-card.featured { transform: none; }
  .process-steps { gap: 16px; }
  .step-arrow { display: none; }
  .step { min-width: 120px; }
  .about-cards { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .footer-links { grid-template-columns: 1fr 1fr; }
  .footer-bottom { flex-direction: column; gap: 16px; text-align: center; }
  .float-btns { right: 16px; bottom: 24px; }
  .section { padding: 70px 0; }
}
@media (max-width: 480px) {
  .hero-btns { flex-direction: column; align-items: center; }
  .hero-stats { flex-direction: column; gap: 16px; }
  .stat-divider { display: none; }
  .adv-grid { grid-template-columns: 1fr; }
}

/* ===== 滚动条 ===== */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--light); }
::-webkit-scrollbar-thumb { background: var(--blue-light); border-radius: 3px; }