/* ======================== Reset ======================== */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{-webkit-font-smoothing:antialiased;scroll-behavior:smooth}
body{font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Segoe UI",sans-serif;color:#1e293b;line-height:1.6;background:#fff;overflow-x:hidden}
a{color:inherit;text-decoration:none}
img{display:block;max-width:100%;height:auto}
ul,ol{list-style:none}
button{font-family:inherit;cursor:pointer;border:none;background:none}
.container{width:92%;max-width:1200px;margin:0 auto}

/* ======================== Header ======================== */
.header{position:fixed;top:0;left:0;width:100%;z-index:100;padding:10px 0;transition:all .4s ease;background:rgba(255,255,255,.95);backdrop-filter:blur(20px);box-shadow:0 1px 20px rgba(0,0,0,.06)}
.header-inner{display:flex;align-items:center;justify-content:space-between}
.header-logo img{height:30px}
.header-nav{display:flex;align-items:center;gap:0;margin-left:auto}
.header-nav>a{padding:8px 16px;font-size:14px;font-weight:500;color:#475569;border-radius:6px;transition:all .25s;white-space:nowrap}
.header-nav>a:hover{color:#2563eb;background:rgba(37,99,235,.06)}

/* Header 样式由 common.css 统一管理 */

/* Nav Dropdown */
.nav-dropdown{position:relative}
.nav-dropdown>a{display:inline-flex;align-items:center;gap:6px;padding:8px 16px;font-size:14px;font-weight:500;color:#475569;border-radius:6px;transition:all .25s;white-space:nowrap;cursor:pointer}
.nav-dropdown>a:hover{color:#2563eb;background:rgba(37,99,235,.06)}
.nav-dropdown>a::after{content:"\f107";font-family:FontAwesome;font-size:10px;transition:transform .25s}
.nav-dropdown:hover>a::after{transform:rotate(180deg)}

/* Dropdown Menu */
.dropdown-menu{position:absolute;top:100%;left:50%;transform:translateX(-50%) translateY(8px);min-width:180px;background:#fff;border-radius:10px;box-shadow:0 12px 40px rgba(0,0,0,.1);border:1px solid rgba(0,0,0,.06);padding:6px;opacity:0;visibility:hidden;transition:all .25s;z-index:100}
.nav-dropdown:hover .dropdown-menu{opacity:1;visibility:visible;transform:translateX(-50%) translateY(0)}
.dropdown-menu a{display:block;padding:9px 14px;font-size:14px;color:#475569;border-radius:6px;transition:all .2s;white-space:nowrap}
.dropdown-menu a:hover{color:#2563eb;background:rgba(37,99,235,.06)}

/* Mega Menu (产品 - 三级菜单) */
.dropdown-mega{min-width:700px;left:50%;transform:translateX(-50%) translateY(8px)}
.dropdown-columns{display:grid;grid-template-columns:repeat(5,1fr);gap:0;padding:16px}
.dropdown-col{padding:0 12px}
.dropdown-col:not(:last-child){border-right:1px solid #f1f5f9}
.dropdown-col h4{font-size:13px;font-weight:700;color:#0f172a;padding:0 0 10px;margin-bottom:8px;border-bottom:2px solid #2563eb}
.dropdown-col a{display:block;padding:7px 0;font-size:13px;color:#64748b;border-radius:0;transition:all .2s}
.dropdown-col a:hover{color:#2563eb;padding-left:4px}
.nav-dropdown:hover .dropdown-mega{transform:translateX(-50%) translateY(0)}

/* Header Actions */
.header-actions{display:flex;align-items:center;gap:8px}
.header-btn{display:inline-flex;align-items:center;padding:7px 18px;font-size:13px;font-weight:600;border-radius:6px;transition:all .3s;white-space:nowrap}
.header-btn-primary{color:#fff;background:linear-gradient(135deg,#2563eb,#7c3aed);box-shadow:0 2px 8px rgba(37,99,235,.2)}
.header-btn-primary:hover{transform:translateY(-1px);box-shadow:0 4px 12px rgba(37,99,235,.3)}
.header-btn-outline{color:#2563eb;background:transparent;border:1.5px solid #2563eb}
.header-btn-outline:hover{background:rgba(37,99,235,.04);transform:translateY(-1px)}

/* Mobile topbar */
.mobile-topbar{display:none;position:fixed;top:0;left:0;width:100%;height:56px;background:#fff;box-shadow:0 2px 12px rgba(0,0,0,.06);z-index:110;align-items:center;justify-content:space-between;padding:0 16px}
.mobile-topbar img{height:28px}
.mobile-toggle{width:40px;height:40px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:5px}
.mobile-toggle span{display:block;width:22px;height:2px;background:#1e293b;border-radius:2px;transition:all .3s}

/* Mobile sidebar */
.mobile-sidebar{position:fixed;top:0;left:0;width:300px;height:100vh;background:#fff;box-shadow:4px 0 24px rgba(0,0,0,.12);z-index:200;transform:translateX(-100%);transition:transform .35s ease;overflow-y:auto}
.mobile-sidebar.open{transform:translateX(0)}
.mobile-sidebar-logo{padding:20px;border-bottom:1px solid #f1f5f9}
.mobile-sidebar-logo img{height:32px}
.mobile-sidebar-nav a{display:block;padding:14px 24px;font-size:15px;color:#334155;border-bottom:1px solid #f1f5f9;transition:all .25s}
.mobile-sidebar-nav a:hover{background:rgba(37,99,235,.04);color:#2563eb}

/* Mobile nav group (二级) */
.mobile-nav-group{border-bottom:1px solid #f1f5f9}
.mobile-nav-parent{display:flex;align-items:center;justify-content:space-between;cursor:pointer}
.mobile-nav-parent i{font-size:12px;transition:transform .25s}
.mobile-nav-group.open>.mobile-nav-parent i{transform:rotate(180deg)}
.mobile-nav-children{display:none;background:#f8fafc}
.mobile-nav-group.open>.mobile-nav-children{display:block}

/* Mobile nav subgroup (三级) */
.mobile-nav-subgroup{border-bottom:1px solid #f1f5f9}
.mobile-nav-subgroup:last-child{border-bottom:none}
.mobile-nav-subparent{display:flex;align-items:center;justify-content:space-between;padding:12px 24px 12px 40px;font-size:14px;color:#475569;cursor:pointer}
.mobile-nav-subparent i{font-size:10px;transition:transform .25s}
.mobile-nav-subgroup.open>.mobile-nav-subparent i{transform:rotate(180deg)}
.mobile-nav-subchildren{display:none;padding-left:24px}
.mobile-nav-subgroup.open>.mobile-nav-subchildren{display:block}
.mobile-nav-subchildren a{border-bottom:none;padding:10px 24px 10px 56px;font-size:13px;color:#64748b}
.mobile-nav-subchildren a:hover{color:#2563eb;background:rgba(37,99,235,.04)}

.sidebar-backdrop{display:none;position:fixed;inset:0;background:rgba(0,0,0,.4);z-index:190}
.sidebar-backdrop.open{display:block}
@media(max-width:1000px){.header{display:none}.mobile-topbar{display:flex}}

/* ======================== Solution Hero ======================== */
.solution-hero{padding:140px 0 100px;position:relative;overflow:hidden;background:#fff}
.hero-inner{display:flex;align-items:center;gap:80px;position:relative;z-index:1}
.hero-content{flex:1}
.hero-badge{display:inline-flex;align-items:center;padding:6px 16px;background:linear-gradient(135deg,rgba(37,99,235,.1),rgba(124,58,237,.1));border-radius:6px;font-size:13px;font-weight:600;color:#2563eb;margin-bottom:24px}
.hero-content h1{font-size:clamp(36px,5vw,52px);font-weight:800;color:#0f172a;line-height:1.2;margin-bottom:20px;letter-spacing:-.02em}
.hero-content h1 span{background:linear-gradient(135deg,#2563eb,#7c3aed);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.hero-content p{font-size:18px;color:#64748b;line-height:1.8;margin-bottom:36px;max-width:540px}
.hero-stats{display:flex;gap:48px;margin-bottom:40px}
.hero-stat{text-align:center}
.hero-stat-num{font-size:36px;font-weight:800;background:linear-gradient(135deg,#2563eb,#7c3aed);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;line-height:1;margin-bottom:8px}
.hero-stat-label{font-size:14px;color:#64748b;font-weight:500}
.hero-visual{flex:1;position:relative}
.hero-visual img{border-radius:16px;box-shadow:none;position:relative;z-index:1}
.hero-visual::before{display:none}
.hero-actions{display:flex;gap:16px;flex-wrap:wrap}
.btn-primary{display:inline-flex;align-items:center;padding:14px 32px;font-size:16px;font-weight:700;color:#fff;background:linear-gradient(135deg,#2563eb,#7c3aed);border-radius:6px;transition:all .3s;box-shadow:0 8px 24px rgba(37,99,235,.3)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 12px 28px rgba(37,99,235,.4)}
.btn-outline{display:inline-flex;align-items:center;padding:14px 32px;font-size:16px;font-weight:700;color:#2563eb;background:transparent;border:2px solid #2563eb;border-radius:6px;transition:all .3s}
.btn-outline:hover{background:rgba(37,99,235,.04);transform:translateY(-2px)}
@media(max-width:1024px){.hero-inner{flex-direction:column;gap:48px}.hero-visual{width:100%}}

/* ======================== Section Common ======================== */
.section{padding:100px 0}
.section-alt{background:#f8fafc}
.section-header{text-align:center;margin-bottom:60px}
.section-header h2{font-size:clamp(26px,3.5vw,36px);font-weight:800;color:#0f172a;margin-bottom:12px;letter-spacing:-.02em}
.section-header p{font-size:16px;color:#64748b;max-width:600px;margin:0 auto;line-height:1.7}

/* ======================== Architecture Section ======================== */
.architecture{padding:100px 0;position:relative;overflow:hidden}
.architecture::before{content:"";position:absolute;top:0;left:0;right:0;bottom:0;background:linear-gradient(135deg,rgba(37,99,235,.03),rgba(124,58,237,.02));z-index:0}
.architecture::after{content:"";position:absolute;top:-50%;right:-20%;width:80%;height:200%;background:radial-gradient(circle,rgba(37,99,235,.06),transparent 60%);z-index:0}
.architecture .container{position:relative;z-index:1}
.arch-image{margin-top:40px;text-align:center;display:flex;justify-content:center}
.arch-image img{max-width:900px;width:100%;height:auto;display:block}
.arch-flow{display:flex;align-items:stretch;gap:24px;margin-top:60px;position:relative}
.arch-step{flex:1;background:#fff;border-radius:16px;padding:36px 28px;border:1px solid #f1f5f9;box-shadow:0 4px 20px rgba(0,0,0,.04);position:relative;z-index:1;transition:all .4s}
.arch-step:hover{transform:translateY(-6px);box-shadow:0 12px 40px rgba(0,0,0,.08)}
.arch-step-num{width:44px;height:44px;display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,#2563eb,#7c3aed);border-radius:10px;font-size:18px;font-weight:800;color:#fff;margin-bottom:20px;box-shadow:0 6px 20px rgba(37,99,235,.25)}
.arch-step h3{font-size:18px;font-weight:700;color:#0f172a;margin-bottom:10px}
.arch-step p{font-size:14px;color:#64748b;line-height:1.7}
.arch-arrow{display:flex;align-items:center;justify-content:center;flex-shrink:0;width:48px;position:relative;z-index:1}
.arch-arrow i{font-size:20px;color:#cbd5e1}
@media(max-width:1024px){.arch-flow{flex-direction:column;gap:16px}.arch-arrow{transform:rotate(90deg);width:auto;height:48px}}

/* ======================== Features Section ======================== */
.features-showcase{padding:100px 0}
.features-layout{display:grid;grid-template-columns:1fr 1fr;gap:80px;align-items:center;margin-bottom:80px}
.features-layout.reverse{direction:rtl}
.features-layout.reverse>*{direction:ltr}
.features-visual{position:relative}
.features-visual img{border-radius:16px;box-shadow:0 12px 40px rgba(0,0,0,.08)}
.features-visual::after{content:"";position:absolute;inset:0;border-radius:16px;background:linear-gradient(135deg,rgba(37,99,235,.05),rgba(124,58,237,.05))}
.features-content h3{font-size:26px;font-weight:800;color:#0f172a;margin-bottom:14px;line-height:1.3}
.features-content h3 span{color:#2563eb}
.features-content p{font-size:15px;color:#64748b;line-height:1.8;margin-bottom:28px}
.feature-list{display:flex;flex-direction:column;gap:18px}
.feature-item{display:flex;gap:14px}
.feature-item-icon{width:44px;height:44px;display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,rgba(37,99,235,.1),rgba(124,58,237,.1));border-radius:10px;font-size:18px;color:#2563eb;flex-shrink:0}
.feature-item h4{font-size:15px;font-weight:700;color:#0f172a;margin-bottom:4px}
.feature-item p{font-size:13px;color:#64748b;line-height:1.5}
@media(max-width:1024px){.features-layout{grid-template-columns:1fr;gap:40px}.features-layout.reverse{direction:ltr}}

/* ======================== Cases Section ======================== */
.cases{padding:100px 0;background:#0f172a;position:relative;overflow:hidden}
.cases::before{content:"";position:absolute;top:0;left:0;right:0;bottom:0;background:linear-gradient(135deg,rgba(37,99,235,.1),rgba(124,58,237,.05));z-index:0}
.cases .section-header h2{color:#fff}
.cases .section-header p{color:rgba(255,255,255,.7)}
.cases-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;position:relative;z-index:1}
.case-card{background:rgba(255,255,255,.05);backdrop-filter:blur(10px);border:1px solid rgba(255,255,255,.1);border-radius:16px;overflow:hidden;transition:all .4s}
.case-card:hover{transform:translateY(-6px);background:rgba(255,255,255,.1);box-shadow:0 12px 40px rgba(0,0,0,.2)}
.case-card-img{height:180px;overflow:hidden}
.case-card-img img{width:100%;height:100%;object-fit:cover;transition:transform .5s}
.case-card:hover .case-card-img img{transform:scale(1.05)}
.case-card-content{padding:24px}
.case-card-tag{display:inline-block;padding:5px 12px;background:linear-gradient(135deg,rgba(37,99,235,.2),rgba(124,58,237,.2));border-radius:6px;font-size:12px;font-weight:600;color:#60a5fa;margin-bottom:14px}
.case-card h4{font-size:16px;font-weight:700;color:#fff;margin-bottom:10px;line-height:1.4}
.case-card p{font-size:13px;color:rgba(255,255,255,.7);line-height:1.7;margin-bottom:16px}
.case-metrics{display:flex;gap:20px;padding-top:16px;border-top:1px solid rgba(255,255,255,.1)}
.case-metric{text-align:center;flex:1}
.case-metric-num{font-size:22px;font-weight:800;background:linear-gradient(135deg,#60a5fa,#a78bfa);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;line-height:1;margin-bottom:4px}
.case-metric-label{font-size:11px;color:rgba(255,255,255,.6)}
@media(max-width:1024px){.cases-grid{grid-template-columns:1fr}}
@media(max-width:768px){.cases-grid{grid-template-columns:1fr}}

/* ======================== Advantages Section ======================== */
.advantages{padding:100px 0}
.advantages-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.advantage-card{text-align:center;padding:36px 20px;background:#fff;border-radius:16px;border:1px solid #f1f5f9;box-shadow:0 4px 20px rgba(0,0,0,.04);transition:all .4s;position:relative;overflow:hidden}
.advantage-card::before{content:"";position:absolute;top:0;left:0;right:0;height:3px;background:linear-gradient(90deg,#2563eb,#7c3aed);transform:scaleX(0);transform-origin:left;transition:transform .5s}
.advantage-card:hover{transform:translateY(-6px);box-shadow:0 12px 40px rgba(0,0,0,.08)}
.advantage-card:hover::before{transform:scaleX(1)}
.advantage-icon{width:56px;height:56px;display:flex;align-items:center;justify-content:center;margin:0 auto 20px;background:linear-gradient(135deg,rgba(37,99,235,.1),rgba(124,58,237,.1));border-radius:14px;font-size:24px;color:#2563eb}
.advantage-card h4{font-size:16px;font-weight:700;color:#0f172a;margin-bottom:10px}
.advantage-card p{font-size:13px;color:#64748b;line-height:1.7}
@media(max-width:1024px){.advantages-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:640px){.advantages-grid{grid-template-columns:1fr}}

/* ======================== CTA Section ======================== */
.cta-section{padding:80px 0;background:linear-gradient(135deg,#2563eb,#7c3aed);text-align:center;position:relative;overflow:hidden}
.cta-section::before{content:"";position:absolute;top:-50%;left:-20%;width:60%;height:200%;background:radial-gradient(circle,rgba(255,255,255,.1),transparent 60%);z-index:0}
.cta-section::after{content:"";position:absolute;bottom:-50%;right:-20%;width:60%;height:200%;background:radial-gradient(circle,rgba(255,255,255,.05),transparent 60%);z-index:0}
.cta-content{position:relative;z-index:1}
.cta-content h2{font-size:clamp(26px,4vw,38px);font-weight:800;color:#fff;margin-bottom:14px;line-height:1.3}
.cta-content p{font-size:17px;color:rgba(255,255,255,.9);margin-bottom:36px;max-width:600px;margin-left:auto;margin-right:auto}
.cta-actions{display:flex;gap:14px;justify-content:center;flex-wrap:wrap}
.btn-white{display:inline-flex;align-items:center;padding:14px 32px;font-size:15px;font-weight:700;color:#2563eb;background:#fff;border-radius:6px;transition:all .3s;box-shadow:0 6px 24px rgba(0,0,0,.15)}
.btn-white:hover{transform:translateY(-2px);box-shadow:0 10px 30px rgba(0,0,0,.2)}
.btn-ghost-white{display:inline-flex;align-items:center;padding:14px 32px;font-size:15px;font-weight:700;color:#fff;background:transparent;border:2px solid rgba(255,255,255,.4);border-radius:6px;transition:all .3s}
.btn-ghost-white:hover{background:rgba(255,255,255,.1);border-color:rgba(255,255,255,.6);transform:translateY(-2px)}

/* ======================== Reveal ======================== */
.reveal{opacity:0;transform:translateY(28px);transition:opacity .7s ease,transform .7s ease}
.reveal.visible{opacity:1;transform:translateY(0)}

/* ======================== Footer ======================== */
.footer{background:#f4f7fc;color:#333;padding:64px 0 0}
.footer-promises{display:flex;justify-content:space-between;max-width:1200px;margin:0 auto;padding:32px 0;border-bottom:1px solid #e8e8e8;margin-bottom:32px;flex-wrap:wrap}
.footer-promise{display:flex;align-items:flex-start;gap:14px;flex:0 0 auto}
.footer-promise img{width:48px;height:48px;flex-shrink:0}
.footer-promise strong{display:block;font-size:16px;font-weight:700;color:#1a1a1a;margin-bottom:4px}
.footer-promise span{font-size:12px;color:#666;line-height:1.5}
@media(max-width:768px){.footer-promises{flex-direction:column;padding:20px 16px}.footer-promise{margin:0}}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr 1.2fr;gap:40px;padding-bottom:40px}
.footer-logo img{height:72px;margin-bottom:16px}
.footer h4{font-size:15px;font-weight:700;color:#1a1a1a;margin-bottom:16px}
.footer ul{display:flex;flex-direction:column;gap:10px}
.footer ul a{font-size:14px;color:#666;transition:all .25s}
.footer ul a:hover{color:#0066ff;padding-left:4px}
.footer-contact li{font-size:14px;color:#666;line-height:1.7}
.footer-qrcodes{display:flex;gap:16px;margin-top:16px}
.footer-qr{text-align:center}
.footer-qr img{width:80px;height:80px;border-radius:8px;object-fit:cover;background:#fff;padding:4px;margin-bottom:6px;border:1px solid #eee}
.footer-qr span{font-size:11px;color:#666}
.footer-bottom{border-top:1px solid #e8e8e8;padding:20px 0;display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:12px;font-size:12px;color:#999}
.footer-bottom a{color:#999;transition:color .25s}
.footer-bottom a:hover{color:#333}
.footer-beian{display:inline-flex;align-items:center;gap:4px}
.footer-beian img{height:14px;display:inline;vertical-align:middle}
@media(max-width:1000px){.footer-grid{grid-template-columns:1fr 1fr}}
@media(max-width:640px){.footer-grid{grid-template-columns:1fr}.footer-bottom{flex-direction:column;text-align:center}}