/* ============================================
   YYY Theme — 优易云科技官网
   蓝白主题 · 专业清新
   ============================================ */

/* ---- 本地字体 ---- */
@font-face{font-family:'Inter';src:url('fonts/inter-latin.woff2') format('woff2');font-weight:400;font-style:normal;font-display:swap}
@font-face{font-family:'Inter';src:url('fonts/inter-latin-700.woff2') format('woff2');font-weight:700;font-style:normal;font-display:swap}
@font-face{font-family:'Noto Sans SC';src:url('fonts/notosans-sc.woff2') format('woff2');font-weight:400;font-style:normal;font-display:swap}
@font-face{font-family:'Noto Sans SC';src:url('fonts/notosans-sc-700.woff2') format('woff2');font-weight:700;font-style:normal;font-display:swap}

:root{
    --blue-50:#eff6ff;--blue-100:#dbeafe;--blue-200:#bfdbfe;--blue-300:#93c5fd;
    --blue-400:#60a5fa;--blue-500:#3b82f6;--blue-600:#2563eb;--blue-700:#1d4ed8;
    --blue-800:#1e40af;--blue-900:#1e3a8a;
    --gray-50:#f8fafc;--gray-100:#f1f5f9;--gray-200:#e2e8f0;--gray-300:#cbd5e1;
    --gray-400:#94a3b8;--gray-500:#64748b;--gray-600:#475569;--gray-700:#334155;
    --gray-800:#1e293b;--gray-900:#0f172a;
    --white:#fff;
    /* Legacy aliases for inline styles */
    --primary-200:var(--blue-200);--primary-400:var(--blue-400);--primary-600:var(--blue-600);
    --font-sans:'Inter',-apple-system,BlinkMacSystemFont,'Segoe UI','Noto Sans SC','PingFang SC','Microsoft YaHei',sans-serif;
    --radius-sm:6px;--radius-md:10px;--radius-lg:16px;--radius-full:9999px;
    --transition:all .3s cubic-bezier(.4,0,.2,1);
    --shadow-sm:0 1px 2px rgba(0,0,0,.05);
    --shadow-md:0 4px 6px -1px rgba(0,0,0,.07),0 2px 4px -2px rgba(0,0,0,.05);
    --shadow-lg:0 10px 15px -3px rgba(0,0,0,.08),0 4px 6px -4px rgba(0,0,0,.04);
    --shadow-blue:0 4px 14px rgba(37,99,235,.15);
}

*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-font-smoothing:antialiased}
body{font-family:var(--font-sans);color:var(--gray-700);background:var(--white);line-height:1.7;font-size:16px;overflow-x:hidden}
a{color:var(--blue-600);text-decoration:none;transition:var(--transition)}
a:hover{color:var(--blue-700)}
img{max-width:100%;height:auto}
ul,ol{list-style:none}
.container{max-width:1280px;margin:0 auto;padding:0 24px}

/* ---- Buttons ---- */
.btn{display:inline-flex;align-items:center;gap:8px;padding:12px 28px;border-radius:var(--radius-full);font-weight:600;font-size:15px;cursor:pointer;transition:var(--transition);border:2px solid transparent;text-decoration:none;line-height:1.4;white-space:nowrap}
.btn-sm{padding:8px 20px;font-size:14px}
.btn-lg{padding:16px 36px;font-size:16px}
.btn-primary{background:var(--blue-600);color:var(--white);border-color:var(--blue-600);box-shadow:var(--shadow-blue)}
.btn-primary:hover{background:var(--blue-700);border-color:var(--blue-700);transform:translateY(-1px);box-shadow:0 6px 20px rgba(37,99,235,.3);color:var(--white)}
.btn-outline{background:transparent;color:var(--blue-600);border-color:var(--blue-300)}
.btn-outline:hover{background:var(--blue-600);color:var(--white);border-color:var(--blue-600)}
.btn-ghost{background:var(--blue-50);color:var(--blue-600);border-color:transparent}
.btn-ghost:hover{background:var(--blue-100)}
.btn-white{background:var(--white);color:var(--blue-700);border-color:var(--white);box-shadow:var(--shadow-md)}
.btn-white:hover{transform:translateY(-1px);box-shadow:var(--shadow-lg);color:var(--blue-700)}

/* ---- Section ---- */
.section{padding:100px 0}
.section-header{text-align:center;max-width:640px;margin:0 auto 64px}
.section-tag{display:inline-block;padding:5px 16px;background:var(--blue-50);color:var(--blue-600);border-radius:var(--radius-full);font-size:12px;font-weight:600;text-transform:uppercase;letter-spacing:.1em;margin-bottom:16px;border:1px solid var(--blue-100)}
.section-title{font-size:clamp(28px,4vw,42px);font-weight:800;color:var(--gray-900);line-height:1.2;margin-bottom:16px;letter-spacing:-.02em}
.section-desc{font-size:17px;color:var(--gray-500);line-height:1.7}

/* ============================================
   Navbar
   ============================================ */
.site-header{position:fixed;top:0;left:0;right:0;z-index:1000;background:rgba(255,255,255,.92);backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);border-bottom:1px solid var(--gray-200);transition:var(--transition)}
.site-header.scrolled{background:rgba(255,255,255,.97);box-shadow:0 1px 12px rgba(0,0,0,.06)}
.navbar .container{display:flex;align-items:center;justify-content:space-between;height:72px}
.navbar-brand{display:flex;align-items:center;gap:10px}
.site-logo-text{display:flex;align-items:center;gap:10px;font-size:20px;font-weight:800;color:var(--gray-900);text-decoration:none}
.site-logo-img{height:40px;width:auto;border-radius:4px}
.site-logo-name{font-size:18px}
.logo-icon{color:var(--blue-500);font-size:22px}
.navbar-collapse{display:flex;align-items:center;gap:8px}
.navbar-nav{display:flex;list-style:none;gap:2px;margin:0;padding:0}
.nav-link{display:flex;align-items:center;gap:4px;padding:8px 16px;color:var(--gray-600);font-weight:500;font-size:15px;border-radius:var(--radius-sm);transition:var(--transition);position:relative}
.nav-link:hover,.nav-link.active{color:var(--blue-600);background:var(--blue-50)}
.nav-link .caret{font-size:10px;transition:var(--transition)}
.nav-item{position:relative}
.nav-dropdown{position:absolute;top:100%;left:0;min-width:240px;background:var(--white);border:1px solid var(--gray-200);border-radius:var(--radius-md);padding:8px;opacity:0;visibility:hidden;transform:translateY(8px);transition:var(--transition);box-shadow:var(--shadow-lg)}
.nav-item:hover .nav-dropdown{opacity:1;visibility:visible;transform:translateY(0)}
.nav-item:hover .caret{transform:rotate(180deg)}
.nav-dropdown a{display:flex;align-items:center;gap:12px;padding:12px 16px;color:var(--gray-600);font-size:14px;border-radius:var(--radius-sm);transition:var(--transition)}
.nav-dropdown a:hover{background:var(--blue-50);color:var(--blue-600)}
.dropdown-icon{font-size:20px}
.dropdown-text strong{display:block;color:var(--gray-900);font-size:14px;font-weight:600}
.dropdown-text span{font-size:12px;color:var(--gray-400)}
.navbar-actions{display:flex;align-items:center;gap:12px}
.search-toggle{background:none;border:none;color:var(--gray-400);cursor:pointer;padding:8px;border-radius:var(--radius-sm);transition:var(--transition);display:flex;align-items:center}
.search-toggle:hover{color:var(--blue-600);background:var(--blue-50)}

/* Search overlay */
.search-overlay{position:fixed;top:0;left:0;right:0;z-index:2000;background:rgba(255,255,255,.95);backdrop-filter:blur(20px);padding:0;transform:translateY(-100%);transition:transform .3s ease}
.search-overlay.active{transform:translateY(0)}
.search-overlay-inner{max-width:720px;margin:0 auto;padding:24px}
.search-overlay .search-input-wrap{display:flex;align-items:center;gap:12px;background:var(--white);border:1px solid var(--gray-200);border-radius:var(--radius-lg);padding:8px 8px 8px 24px;box-shadow:var(--shadow-md)}
.search-overlay input{flex:1;background:none;border:none;outline:none;color:var(--gray-900);font-size:18px;font-family:var(--font-sans)}
.search-overlay input::placeholder{color:var(--gray-400)}
.search-close{background:none;border:none;color:var(--gray-400);cursor:pointer;padding:8px 12px;font-size:14px;transition:var(--transition)}
.search-close:hover{color:var(--blue-600)}
.search-submit{background:var(--blue-600);color:var(--white);border:none;padding:10px 24px;border-radius:var(--radius-md);font-weight:600;cursor:pointer;transition:var(--transition)}
.search-submit:hover{background:var(--blue-700)}
.navbar-toggler{display:none;flex-direction:column;gap:5px;background:none;border:none;cursor:pointer;padding:8px}
.toggler-bar{display:block;width:24px;height:2px;background:var(--gray-800);border-radius:2px;transition:var(--transition)}

/* Mobile nav */
.mobile-nav-overlay{position:fixed;inset:0;z-index:1500;background:rgba(0,0,0,.3);opacity:0;visibility:hidden;transition:var(--transition)}
.mobile-nav-overlay.active{opacity:1;visibility:visible}
.mobile-nav-panel{position:fixed;top:0;right:0;bottom:0;z-index:1501;width:80vw;max-width:360px;background:var(--white);transform:translateX(100%);transition:transform .3s ease;display:flex;flex-direction:column;overflow-y:auto;box-shadow:-4px 0 30px rgba(0,0,0,.1)}
.mobile-nav-panel.active{transform:translateX(0)}
.mobile-nav-header{display:flex;align-items:center;justify-content:space-between;padding:20px 24px;border-bottom:1px solid var(--gray-100)}
.mobile-nav-close{background:none;border:none;color:var(--gray-400);cursor:pointer;padding:8px;font-size:20px;transition:var(--transition)}
.mobile-nav-close:hover{color:var(--gray-900)}
.mobile-nav-search{padding:16px 24px}
.mobile-nav-search input{width:100%;padding:12px 16px;background:var(--gray-50);border:1px solid var(--gray-200);border-radius:var(--radius-md);color:var(--gray-900);font-size:15px;outline:none}
.mobile-nav-search input::placeholder{color:var(--gray-400)}
.mobile-nav-links{flex:1;padding:8px 24px}
.mobile-nav-links a{display:flex;align-items:center;justify-content:space-between;padding:14px 0;color:var(--gray-700);font-size:16px;font-weight:500;border-bottom:1px solid var(--gray-100)}
.mobile-nav-links a:hover{color:var(--blue-600)}
.mobile-sub-menu{padding-left:16px;display:none}
.mobile-sub-menu.open{display:block}
.mobile-sub-menu a{font-size:14px;padding:10px 0;color:var(--gray-500)}
.mobile-nav-footer{padding:24px;border-top:1px solid var(--gray-100)}
.mobile-nav-footer .phone{display:block;color:var(--blue-600);font-size:18px;font-weight:700;margin-bottom:12px}

/* ============================================
   Hero — 白底科技粒子
   ============================================ */
.hero-section{
    position:relative;min-height:100vh;display:flex;align-items:center;
    padding-top:72px;overflow:hidden;
    background:var(--white);
}
.hero-bg{position:absolute;inset:0;z-index:0}
.hero-particle-canvas{position:absolute;inset:0;width:100%;height:100%;z-index:0}
.hero-glow{position:absolute;border-radius:50%;filter:blur(140px);pointer-events:none}
.hero-glow-1{width:600px;height:600px;background:rgba(37,99,235,.07);top:-15%;left:-5%;animation:glowFloat 8s ease-in-out infinite alternate}
.hero-glow-2{width:500px;height:500px;background:rgba(96,165,250,.06);bottom:-10%;right:-5%;animation:glowFloat 10s ease-in-out infinite alternate-reverse}
@keyframes glowFloat{0%{transform:translate(0,0) scale(1)}100%{transform:translate(15px,-12px) scale(1.05)}}

.hero-content{position:relative;z-index:1;text-align:center;max-width:800px;margin:0 auto;padding:80px 24px}
.hero-badge{display:inline-flex;align-items:center;padding:8px 20px;background:var(--blue-50);color:var(--blue-600);border-radius:var(--radius-full);font-size:12px;font-weight:600;letter-spacing:.12em;margin-bottom:32px;border:1px solid var(--blue-100)}
.hero-title{font-size:clamp(36px,6vw,64px);font-weight:800;line-height:1.1;color:var(--gray-900);margin-bottom:20px;letter-spacing:-.02em}

/* AI 文字动态效果 */
.text-ai{
    display:inline-block;
    background:linear-gradient(135deg,var(--blue-500),var(--blue-700));
    -webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;
    position:relative;
    animation:aiPulse 2s ease-in-out infinite;
    font-size:1.15em;
}
.text-ai::after{
    content:'';position:absolute;bottom:-4px;left:0;right:0;height:3px;
    background:linear-gradient(90deg,var(--blue-400),var(--blue-600),var(--blue-400));
    border-radius:2px;
    animation:aiUnderline 2s ease-in-out infinite;
}
@keyframes aiPulse{
    0%,100%{transform:scale(1);filter:brightness(1)}
    25%{transform:scale(1.08);filter:brightness(1.2)}
    50%{transform:scale(1.12);filter:brightness(1.3)}
    75%{transform:scale(1.05);filter:brightness(1.1)}
}
@keyframes aiUnderline{
    0%,100%{opacity:.4;transform:scaleX(.6)}
    50%{opacity:1;transform:scaleX(1)}
}

.hero-subtitle{font-size:22px;color:var(--gray-700);font-weight:600;margin-bottom:16px}
.hero-desc{font-size:17px;color:var(--gray-500);line-height:1.8;margin-bottom:40px;max-width:600px;margin-left:auto;margin-right:auto}
.hero-actions{display:flex;gap:16px;justify-content:center;flex-wrap:wrap;margin-bottom:64px}
.hero-actions .btn-outline{color:var(--blue-600);border-color:var(--blue-300)}
.hero-actions .btn-outline:hover{background:var(--blue-600);color:var(--white);border-color:var(--blue-600)}

/* ============================================
   Stats Bar
   ============================================ */
.stats-bar{background:var(--white);border-bottom:1px solid var(--gray-200);padding:48px 0}
.stats-grid{display:flex;justify-content:center;gap:80px;flex-wrap:wrap}
.stat-item{text-align:center;min-width:140px}
.stat-number{display:block;font-size:42px;font-weight:800;color:var(--blue-600);line-height:1.2}
.stat-label{font-size:14px;color:var(--gray-400);font-weight:500;margin-top:4px}

/* ============================================
   Core Services
   ============================================ */
.services-section{padding:100px 0;background:var(--gray-50)}
.services-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.service-card{position:relative;background:var(--white);border-radius:var(--radius-lg);padding:32px 24px;border:1px solid var(--gray-200);transition:var(--transition);overflow:hidden;box-shadow:var(--shadow-sm)}
.service-card::before{content:'';position:absolute;top:0;left:0;right:0;height:3px;background:linear-gradient(90deg,var(--blue-500),var(--blue-400));opacity:0;transition:var(--transition)}
.service-card:hover{transform:translateY(-4px);border-color:var(--blue-200);box-shadow:var(--shadow-lg)}
.service-card:hover::before{opacity:1}
.service-card.featured{border-color:var(--blue-200)}
.service-card.featured::before{opacity:1}
.service-badge{position:absolute;top:16px;right:16px;padding:4px 12px;background:var(--blue-600);color:var(--white);border-radius:var(--radius-full);font-size:11px;font-weight:600}
.service-icon{display:inline-flex;align-items:center;justify-content:center;width:56px;height:56px;background:var(--blue-50);border-radius:var(--radius-md);color:var(--blue-600);margin-bottom:20px}
.service-title{font-size:18px;font-weight:700;color:var(--gray-900);margin-bottom:12px}
.service-desc{font-size:14px;color:var(--gray-500);line-height:1.7;margin-bottom:16px}
.service-tags{display:flex;flex-wrap:wrap;gap:6px;margin-bottom:16px}
.tag-pill{display:inline-block;padding:3px 10px;background:var(--blue-50);color:var(--blue-600);border:1px solid var(--blue-100);border-radius:var(--radius-full);font-size:12px;font-weight:500}
.service-link{display:inline-flex;align-items:center;gap:6px;color:var(--blue-500);font-size:14px;font-weight:600}
.service-link:hover{color:var(--blue-700);gap:10px}

/* ============================================
   Tech Stack
   ============================================ */
.tech-section{padding:100px 0;position:relative;overflow:hidden;background:var(--gray-900)}
.tech-section::before{content:'';position:absolute;inset:0;background:radial-gradient(ellipse 50% 40% at 20% 50%,rgba(37,99,235,.15),transparent),radial-gradient(ellipse 40% 30% at 80% 40%,rgba(59,130,246,.1),transparent);pointer-events:none}
.tech-section .section-tag{background:rgba(255,255,255,.06);color:rgba(255,255,255,.5);border-color:rgba(255,255,255,.08)}
.tech-section .section-title{color:var(--white)}
.tech-section .section-desc{color:rgba(255,255,255,.5)}
.tech-matrix{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;position:relative;z-index:1}
.tech-card{position:relative;background:rgba(255,255,255,.04);border-radius:var(--radius-lg);padding:24px 20px;border:1px solid rgba(255,255,255,.06);transition:var(--transition);overflow:hidden}
.tech-card::before{content:'';position:absolute;top:0;left:0;right:0;height:1px;background:linear-gradient(90deg,rgba(59,130,246,.3),rgba(96,165,250,.3),rgba(59,130,246,.3));opacity:.5;transition:var(--transition)}
.tech-card:hover{background:rgba(255,255,255,.07);border-color:rgba(255,255,255,.1);transform:translateY(-2px)}
.tech-card:hover::before{opacity:1}
.tech-card-header{display:flex;align-items:center;gap:10px;margin-bottom:14px}
.tech-card-icon{width:36px;height:36px;background:rgba(255,255,255,.06);border-radius:var(--radius-sm);display:flex;align-items:center;justify-content:center;font-size:16px;flex-shrink:0}
.tech-card-title{font-size:14px;font-weight:700;color:rgba(255,255,255,.85)}
.tech-card-tags{display:flex;flex-wrap:wrap;gap:6px}
.tech-tag{padding:4px 10px;background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.06);border-radius:var(--radius-full);font-size:12px;color:rgba(255,255,255,.5);transition:var(--transition);font-weight:500}
.tech-tag:hover{border-color:rgba(59,130,246,.3);color:rgba(255,255,255,.8);background:rgba(59,130,246,.1)}

/* ============================================
   Solutions
   ============================================ */
.solutions-section{padding:100px 0;background:var(--white)}
.solution-item{display:grid;grid-template-columns:1fr 1fr;gap:64px;align-items:center;padding:64px 0;border-bottom:1px solid var(--gray-100)}
.solution-item:last-child{border-bottom:none}
.solution-item:nth-child(even){direction:rtl}
.solution-item:nth-child(even)>*{direction:ltr}
.solution-image{background:linear-gradient(135deg,var(--blue-50),var(--blue-100));border-radius:var(--radius-lg);border:1px solid var(--blue-200);aspect-ratio:16/10;display:flex;align-items:center;justify-content:center;color:var(--blue-400);font-size:14px}
.solution-content .section-tag{margin-bottom:12px}
.solution-content .section-title{font-size:32px;margin-bottom:16px}
.solution-desc{font-size:15px;color:var(--gray-500);line-height:1.8;margin-bottom:20px}
.solution-highlights{display:flex;flex-wrap:wrap;gap:8px}

/* ============================================
   Cases
   ============================================ */
.cases-section{padding:100px 0;background:var(--gray-50)}
.cases-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;margin-bottom:48px}
.case-card{background:var(--white);border-radius:var(--radius-lg);border:1px solid var(--gray-200);overflow:hidden;transition:var(--transition);box-shadow:var(--shadow-sm)}
.case-card:hover{transform:translateY(-4px);border-color:var(--blue-200);box-shadow:var(--shadow-lg)}
.case-card-image{aspect-ratio:16/10;background:linear-gradient(135deg,var(--blue-50),var(--gray-100));display:flex;align-items:center;justify-content:center;color:var(--gray-400);font-size:13px}
.case-card-body{padding:20px}
.case-card-category{display:inline-block;padding:3px 10px;background:var(--blue-50);color:var(--blue-600);border-radius:var(--radius-full);font-size:12px;font-weight:500;margin-bottom:10px}
.case-card-title{font-size:17px;font-weight:700;color:var(--gray-900);margin-bottom:8px}
.case-card-desc{font-size:14px;color:var(--gray-500);line-height:1.6;margin-bottom:12px}
.case-card-link{display:inline-flex;align-items:center;gap:6px;color:var(--blue-500);font-size:14px;font-weight:600}
.case-card-link:hover{color:var(--blue-700);gap:10px}
.cases-more{text-align:center}

/* ============================================
   Why Us
   ============================================ */
.whyus-section{padding:100px 0;background:var(--white)}
.whyus-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.whyus-card{background:var(--white);border-radius:var(--radius-lg);padding:32px;border:1px solid var(--gray-200);transition:var(--transition);box-shadow:var(--shadow-sm)}
.whyus-card:hover{border-color:var(--blue-200);box-shadow:var(--shadow-lg);transform:translateY(-2px)}
.whyus-icon{display:inline-flex;align-items:center;justify-content:center;width:48px;height:48px;background:var(--blue-50);border-radius:var(--radius-md);font-size:22px;margin-bottom:16px;color:var(--blue-600)}
.whyus-title{font-size:17px;font-weight:700;color:var(--gray-900);margin-bottom:8px}
.whyus-desc{font-size:14px;color:var(--gray-500);line-height:1.7}

/* ============================================
   Partners
   ============================================ */
.partners-section{padding:80px 0;background:var(--gray-50);overflow:hidden}
.partners-marquee{position:relative}
.partners-track{display:flex;gap:64px;align-items:center;animation:marquee 30s linear infinite}
.partners-track img,.partners-track .partner-placeholder{height:40px;opacity:.4;filter:grayscale(1);transition:var(--transition);flex-shrink:0}
.partners-track .partner-placeholder{padding:8px 24px;background:var(--white);border-radius:var(--radius-sm);color:var(--gray-400);font-size:14px;font-weight:600;white-space:nowrap;border:1px solid var(--gray-200)}
.partners-track :hover{opacity:.8;filter:grayscale(0)}
@keyframes marquee{0%{transform:translateX(0)}100%{transform:translateX(-50%)}}

/* ============================================
   CTA
   ============================================ */
.cta-section{padding:100px 0;position:relative;overflow:hidden;background:linear-gradient(135deg,var(--blue-700),var(--blue-600),var(--blue-500))}
.cta-section::before{content:'';position:absolute;inset:0;background:radial-gradient(circle at 20% 50%,rgba(255,255,255,.1),transparent 50%),radial-gradient(circle at 80% 50%,rgba(255,255,255,.06),transparent 50%)}
.cta-content{position:relative;text-align:center;max-width:640px;margin:0 auto}
.cta-title{font-size:clamp(28px,4vw,40px);font-weight:800;color:var(--white);margin-bottom:16px;line-height:1.2}
.cta-desc{font-size:18px;color:rgba(255,255,255,.85);margin-bottom:36px}
.cta-actions{display:flex;gap:16px;justify-content:center;flex-wrap:wrap}

/* ============================================
   Footer
   ============================================ */
.site-footer{background:var(--gray-50);color:var(--gray-600);padding:80px 0 0}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.5fr;gap:48px;padding-bottom:60px;border-bottom:1px solid var(--gray-200)}
.footer-logo{display:flex;align-items:center;gap:8px;font-size:20px;font-weight:800;color:var(--gray-900);margin-bottom:16px}
.footer-desc{font-size:14px;color:var(--gray-500);line-height:1.7;margin-bottom:20px}
.footer-contact-list{list-style:none}
.footer-contact-list li{display:flex;align-items:center;gap:10px;margin-bottom:10px;font-size:14px}
.footer-contact-list .icon{color:var(--blue-400)}
.footer-title{font-size:15px;font-weight:700;color:var(--gray-900);margin-bottom:20px}
.footer-links{list-style:none}
.footer-links li{margin-bottom:10px}
.footer-links a{color:var(--gray-500);font-size:14px}
.footer-links a:hover{color:var(--blue-500);padding-left:4px}
.footer-qrcode{display:inline-flex;flex-direction:column;align-items:center;gap:8px}
.footer-qrcode-placeholder{width:120px;height:120px;background:var(--white);border:1px solid var(--gray-200);border-radius:var(--radius-md);display:flex;align-items:center;justify-content:center;color:var(--gray-400);font-size:12px}
.footer-qrcode span{font-size:12px;color:var(--gray-500)}
.footer-social{display:flex;gap:12px;margin-top:12px}
.social-link{display:inline-flex;align-items:center;justify-content:center;padding:8px 16px;background:var(--white);border-radius:var(--radius-sm);color:var(--gray-500);font-size:13px;border:1px solid var(--gray-200)}
.social-link:hover{background:var(--blue-50);color:var(--blue-600);border-color:var(--blue-200)}
.footer-bottom{display:flex;justify-content:space-between;align-items:center;padding:24px 0;font-size:13px;color:var(--gray-400);border-top:1px solid var(--gray-200)}

/* ============================================
   Page Banner
   ============================================ */
.page-banner{height:385px;display:flex;align-items:center;justify-content:center;background:linear-gradient(180deg,var(--blue-50),var(--white));text-align:center;position:relative;overflow:hidden;padding-top:72px}
.page-banner::before{content:'';position:absolute;inset:0;background:radial-gradient(ellipse 60% 50% at 50% 0%,var(--blue-100),transparent)}
.page-banner-bg{position:absolute;inset:0;pointer-events:none;z-index:0}
.page-banner-particle-canvas{position:absolute;inset:0;width:100%;height:100%;pointer-events:none}
.page-banner-fade{position:absolute;bottom:0;left:0;right:0;height:100px;background:linear-gradient(to bottom,transparent 0%,rgba(255,255,255,.4) 40%,var(--white) 100%);pointer-events:none;z-index:2}
.page-banner .container{position:relative;z-index:1}
.breadcrumb{display:flex;align-items:center;gap:8px;justify-content:center;margin-bottom:20px;font-size:13px;color:var(--gray-400)}
.breadcrumb a{color:var(--gray-500)}
.breadcrumb a:hover{color:var(--blue-600)}
.breadcrumb .sep{color:var(--gray-300)}
.breadcrumb .current{color:var(--gray-400)}
.page-banner-title{font-size:clamp(28px,4vw,42px);font-weight:800;color:var(--gray-900);margin-bottom:12px}
.page-banner-desc{font-size:17px;color:var(--gray-500);max-width:600px;margin:0 auto}
.page-banner-subtitle{font-size:17px;color:var(--gray-500);max-width:600px;margin:0 auto}
.breadcrumb-sep{color:var(--gray-300);margin:0 2px}
.breadcrumb-current{color:var(--gray-400)}

.filter-bar{display:flex;gap:8px;flex-wrap:wrap;justify-content:center;padding:32px 0;border-bottom:1px solid var(--gray-100)}
.filter-btn{padding:8px 20px;background:var(--white);border:1px solid var(--gray-200);border-radius:var(--radius-full);color:var(--gray-500);font-size:14px;font-weight:500;cursor:pointer;transition:var(--transition)}
.filter-btn:hover,.filter-btn.active{background:var(--blue-600);color:var(--white);border-color:var(--blue-600)}

/* ============================================
   Page Content (通用页面)
   ============================================ */
.page-section{padding:80px 0}
.page-content{max-width:800px;margin:0 auto}
.page-title{font-size:36px;font-weight:800;color:var(--gray-900);margin-bottom:24px;text-align:center}
.page-body{font-size:16px;line-height:1.8;color:var(--gray-700)}
.page-body h2{font-size:24px;font-weight:700;color:var(--gray-900);margin:32px 0 16px}
.page-body h3{font-size:20px;font-weight:600;color:var(--gray-900);margin:24px 0 12px}
.page-body p{margin-bottom:16px}
.page-body ul,.page-body ol{padding-left:24px;margin-bottom:16px}
.page-body li{margin-bottom:8px;list-style:disc}

.page-content-section{padding:80px 0}
.content-grid{display:grid;grid-template-columns:1fr 320px;gap:48px}
.main-content{min-width:0}
.sidebar{position:sticky;top:96px;align-self:start}
.sidebar-widget{background:var(--white);border-radius:var(--radius-lg);padding:24px;border:1px solid var(--gray-200);margin-bottom:24px}
.sidebar-title{font-size:15px;font-weight:700;color:var(--gray-900);margin-bottom:16px}

/* Article */
.article-header{margin-bottom:32px}
.article-title{font-size:32px;font-weight:800;color:var(--gray-900);margin-bottom:16px;line-height:1.3}
.article-meta{display:flex;gap:16px;flex-wrap:wrap;color:var(--gray-400);font-size:14px}
.article-meta span{display:flex;align-items:center;gap:4px}
.article-body{font-size:16px;line-height:1.8;color:var(--gray-700)}
.article-body h2{font-size:24px;font-weight:700;color:var(--gray-900);margin:40px 0 16px}
.article-body h3{font-size:20px;font-weight:600;color:var(--gray-900);margin:32px 0 12px}
.article-body p{margin-bottom:16px}
.article-body ul,.article-body ol{padding-left:24px;margin-bottom:16px}
.article-body li{margin-bottom:8px;list-style:disc}
.article-body code{background:var(--blue-50);padding:2px 8px;border-radius:4px;font-family:monospace;font-size:14px;color:var(--blue-700)}
.article-body pre{background:var(--gray-900);padding:20px;border-radius:var(--radius-md);overflow-x:auto;margin-bottom:16px}
.article-body pre code{background:none;padding:0;color:var(--gray-300)}
.article-body blockquote{border-left:3px solid var(--blue-300);padding:16px 24px;background:var(--blue-50);border-radius:0 var(--radius-md) var(--radius-md) 0;margin-bottom:16px;color:var(--gray-600)}
.article-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:32px;padding-top:24px;border-top:1px solid var(--gray-200)}

.post-nav{display:grid;grid-template-columns:1fr 1fr;gap:24px;margin-top:48px;padding-top:32px;border-top:1px solid var(--gray-200)}
.post-nav a{display:block;padding:20px;background:var(--white);border-radius:var(--radius-md);border:1px solid var(--gray-200)}
.post-nav-label{font-size:12px;color:var(--gray-400);margin-bottom:4px}
.post-nav-title{font-size:15px;color:var(--gray-900);font-weight:600}

/* Contact / Forms */
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:64px}
.contact-cards{display:grid;gap:16px}
.contact-card{display:flex;align-items:center;gap:16px;padding:20px;background:var(--white);border-radius:var(--radius-md);border:1px solid var(--gray-200)}
.contact-card-icon{width:48px;height:48px;background:var(--blue-50);border-radius:var(--radius-md);display:flex;align-items:center;justify-content:center;font-size:20px;flex-shrink:0;color:var(--blue-600)}
.contact-card-label{font-size:13px;color:var(--gray-400)}
.contact-card-value{font-size:16px;color:var(--gray-900);font-weight:600}
.contact-form{display:flex;flex-direction:column;gap:16px}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.form-group{display:flex;flex-direction:column;gap:6px}
.form-group label{font-size:14px;color:var(--gray-600);font-weight:500}
.form-group input,.form-group select,.form-group textarea{padding:12px 16px;background:var(--white);border:1px solid var(--gray-200);border-radius:var(--radius-md);color:var(--gray-900);font-size:15px;font-family:var(--font-sans);outline:none;transition:var(--transition)}
.form-group input:focus,.form-group select:focus,.form-group textarea:focus{border-color:var(--blue-400);box-shadow:0 0 0 3px rgba(59,130,246,.1)}
.form-group textarea{min-height:120px;resize:vertical}
.form-group select{appearance:none;cursor:pointer}
.contact-form-wrapper{max-width:640px;margin:0 auto}
.map-placeholder{width:100%;height:300px;background:var(--gray-100);border-radius:var(--radius-lg);border:1px solid var(--gray-200);display:flex;align-items:center;justify-content:center;color:var(--gray-400);font-size:14px;margin-top:32px}

/* Timeline */
.timeline{position:relative;padding-left:32px}
.timeline::before{content:'';position:absolute;left:8px;top:0;bottom:0;width:2px;background:linear-gradient(to bottom,var(--blue-400),transparent)}
.timeline-item{position:relative;padding-bottom:40px}
.timeline-item:last-child{padding-bottom:0}
.timeline-item::before{content:'';position:absolute;left:-28px;top:4px;width:12px;height:12px;background:var(--blue-500);border-radius:50%;border:3px solid var(--white)}
.timeline-year{font-size:14px;color:var(--gray-500);font-weight:700;margin-bottom:4px}
.timeline-text{font-size:15px;color:var(--gray-700)}
.timeline-dot{position:absolute;left:-28px;top:4px;width:12px;height:12px;background:var(--blue-500);border-radius:50%;border:3px solid var(--white)}
.timeline-title{font-size:16px;font-weight:700;color:var(--gray-900);margin-bottom:4px}
.timeline-desc{font-size:14px;color:var(--gray-500);line-height:1.6}

/* Search */
.search-results-list{display:flex;flex-direction:column;gap:20px}
.search-result-card{display:grid;grid-template-columns:140px 1fr;gap:24px;padding:24px;background:var(--white);border-radius:var(--radius-lg);border:1px solid var(--gray-200);transition:var(--transition);text-decoration:none;box-shadow:var(--shadow-sm)}
.search-result-card:hover{border-color:var(--blue-200);box-shadow:var(--shadow-lg);transform:translateY(-2px)}
.search-result-thumb{background:linear-gradient(135deg,var(--blue-50),var(--blue-100));border-radius:var(--radius-md);aspect-ratio:4/3;display:flex;align-items:center;justify-content:center;border:1px solid var(--blue-200);overflow:hidden;transition:var(--transition)}
.search-result-thumb-letter{font-size:36px;font-weight:800;color:var(--blue-400);line-height:1;user-select:none}
.search-result-type-post .search-result-thumb{background:linear-gradient(135deg,#f0fdf4,#dcfce7);border-color:#bbf7d0}
.search-result-type-post .search-result-thumb-letter{color:#16a34a}
.search-result-type-case .search-result-thumb{background:linear-gradient(135deg,#fefce8,#fef9c3);border-color:#fde68a}
.search-result-type-case .search-result-thumb-letter{color:#ca8a04}
.search-result-type-solution .search-result-thumb{background:linear-gradient(135deg,#eff6ff,#dbeafe);border-color:#bfdbfe}
.search-result-type-solution .search-result-thumb-letter{color:var(--blue-500)}
.search-result-card:hover .search-result-thumb{transform:scale(1.03)}
.search-result-body{min-width:0;display:flex;flex-direction:column;gap:8px}
.search-result-meta{display:flex;align-items:center;gap:10px;flex-wrap:wrap}
.search-result-type-badge{display:inline-block;padding:3px 10px;background:var(--blue-50);color:var(--blue-600);border-radius:var(--radius-full);font-size:12px;font-weight:600}
.search-result-category{font-size:13px;color:var(--gray-400)}
.search-result-date{font-size:13px;color:var(--gray-400)}
.search-result-title{font-size:18px;font-weight:700;color:var(--gray-900);line-height:1.4}
.search-result-card:hover .search-result-title{color:var(--blue-600)}
.search-result-excerpt{font-size:14px;color:var(--gray-500);line-height:1.7}
.search-result-tags{display:flex;flex-wrap:wrap;gap:6px;margin-top:4px}
.search-result-tag{display:inline-block;padding:2px 8px;background:var(--gray-50);color:var(--gray-500);border:1px solid var(--gray-200);border-radius:var(--radius-full);font-size:11px;font-weight:500}
.search-empty{text-align:center;padding:80px 0}
.search-empty-icon{font-size:64px;margin-bottom:16px}
.search-empty-title{font-size:24px;font-weight:700;color:var(--gray-900);margin-bottom:8px}
.search-empty-desc{font-size:16px;color:var(--gray-500);margin-bottom:32px}

.pagination{display:flex;gap:8px;justify-content:center;margin-top:48px}
.pagination a,.pagination span{display:inline-flex;align-items:center;justify-content:center;min-width:40px;height:40px;padding:0 12px;background:var(--white);border:1px solid var(--gray-200);border-radius:var(--radius-sm);color:var(--gray-500);font-size:14px;transition:var(--transition)}
.pagination a:hover,.pagination .current{background:var(--blue-600);color:var(--white);border-color:var(--blue-600)}

/* Back to Top */
.back-to-top{position:fixed;bottom:32px;right:32px;z-index:900;width:44px;height:44px;background:var(--blue-600);border:none;border-radius:var(--radius-md);color:var(--white);cursor:pointer;display:flex;align-items:center;justify-content:center;opacity:0;visibility:hidden;transform:translateY(10px);transition:var(--transition);box-shadow:var(--shadow-blue)}
.back-to-top.visible{opacity:1;visibility:visible;transform:translateY(0)}
.back-to-top:hover{background:var(--blue-700);transform:translateY(-2px)}

/* Mobile CTA */
.mobile-cta-bar{display:none;position:fixed;bottom:0;left:0;right:0;z-index:800;background:var(--white);border-top:1px solid var(--gray-200);padding:12px 16px;gap:12px;box-shadow:0 -2px 12px rgba(0,0,0,.06)}
.mobile-cta-bar .btn{flex:1;justify-content:center;padding:10px 16px;font-size:14px}

/* ============================================
   Blog List
   ============================================ */
.blog-list{display:flex;flex-direction:column;gap:32px}
.blog-item{display:grid;grid-template-columns:280px 1fr;gap:32px;background:var(--white);border-radius:var(--radius-lg);border:1px solid var(--gray-200);overflow:hidden;transition:var(--transition);box-shadow:var(--shadow-sm)}
.blog-item:hover{border-color:var(--blue-200);box-shadow:var(--shadow-lg)}
.blog-item-image{height:100%;min-height:200px;background:linear-gradient(135deg,var(--blue-50),var(--gray-100));display:flex;align-items:center;justify-content:center;color:var(--gray-400);font-size:13px}
a.blog-item-image{text-decoration:none;color:var(--gray-400)}
a.blog-item-image:hover{color:var(--blue-400)}
.blog-item-content{padding:24px 24px 24px 0}
.blog-item-meta{display:flex;gap:16px;flex-wrap:wrap;color:var(--gray-400);font-size:13px;margin-bottom:12px}
.blog-item-title{font-size:20px;font-weight:700;color:var(--gray-900);margin-bottom:8px;line-height:1.4}
.blog-item-title a{color:var(--gray-900)}
.blog-item-title a:hover{color:var(--blue-600)}
.blog-item-excerpt{font-size:14px;color:var(--gray-500);line-height:1.7;margin-bottom:12px}

/* Post Navigation */
.post-nav-item{display:flex;flex-direction:column;gap:8px}
.post-nav-item span:first-child{font-size:13px;color:var(--gray-400)}
.post-nav-item a{display:block;padding:20px;background:var(--white);border-radius:var(--radius-md);border:1px solid var(--gray-200);font-size:15px;color:var(--gray-900);font-weight:600;transition:var(--transition)}
.post-nav-item a:hover{border-color:var(--blue-200);box-shadow:var(--shadow-md)}

/* Solution detail extras */
.solution-item.reverse{direction:rtl}
.solution-item.reverse>*{direction:ltr}

/* ============================================
   Responsive
   ============================================ */
@media(max-width:1279px){
    .services-grid{grid-template-columns:repeat(2,1fr)}
    .tech-matrix{grid-template-columns:repeat(2,1fr)}
    .cases-grid{grid-template-columns:repeat(2,1fr)}
    .whyus-grid{grid-template-columns:repeat(2,1fr)}
    .solution-item{grid-template-columns:1fr;gap:32px}
    .solution-item:nth-child(even){direction:ltr}
    .footer-grid{grid-template-columns:repeat(2,1fr)}
    .content-grid{grid-template-columns:1fr}
    .sidebar{position:static}
    .contact-grid{grid-template-columns:1fr}
    /* Override inline grid-template-columns on detail pages */
    .whyus-grid[style*="grid-template-columns:repeat(4"]{grid-template-columns:repeat(2,1fr)!important}
    .whyus-grid[style*="grid-template-columns:repeat(3"]{grid-template-columns:repeat(2,1fr)!important}
    .whyus-grid[style*="grid-template-columns:repeat(2"]{grid-template-columns:1fr!important}
}
@media(max-width:991px){
    .nav-link{padding:8px 10px;font-size:14px}
    .site-logo-img{height:32px}
    .site-logo-name{font-size:15px}
    .navbar-toggler{display:flex}
    .navbar-collapse{display:none!important}
    .mobile-cta-bar{display:flex}
    .section{padding:64px 0}
    .hero-content{padding:60px 16px}
    .hero-subtitle{font-size:18px}
    .stats-grid{grid-template-columns:repeat(2,1fr);gap:32px}
    .services-grid{grid-template-columns:1fr}
    .cases-grid{grid-template-columns:1fr}
    .whyus-grid{grid-template-columns:1fr!important}
    .tech-matrix{grid-template-columns:1fr!important}
    .tech-matrix .tech-card{grid-column:span 1!important}
    .footer-grid{grid-template-columns:1fr;gap:32px}
    .footer-bottom{flex-direction:column;gap:8px;text-align:center}
    .cta-actions{flex-direction:column;align-items:center}
    .form-row{grid-template-columns:1fr}
    .post-nav{grid-template-columns:1fr}
    .page-banner{height:320px;padding-top:72px}
    .back-to-top{bottom:80px;right:16px}
    body{padding-bottom:60px}
    .blog-item{grid-template-columns:1fr}
    .blog-item-content{padding:20px}
    .blog-item-image{height:auto;aspect-ratio:16/9}
    /* Force contact cards to single column on mobile */
    .whyus-grid[style*="grid-template-columns:repeat(3"]{grid-template-columns:1fr!important}
    /* Architecture diagram: stack vertically on mobile */
    .map-placeholder > div > div > div[style*="display:flex"],
    .map-placeholder [style*="display:flex"][style*="justify-content:center"][style*="gap:48px"]{
        flex-direction:column!important;gap:16px!important;
    }
    /* Contact form submit button full width */
    .contact-form .btn{width:100%;justify-content:center}
    /* Section header tighter on mobile */
    .section-header{margin-bottom:40px}
    /* Stats number smaller */
    .stat-number{font-size:32px}
    /* Search results: stack on mobile */
    .search-result-card{grid-template-columns:1fr;gap:16px}
    .search-result-thumb{aspect-ratio:16/9;max-height:180px}
}
/* Tablet portrait (768-1024) */
@media(min-width:768px) and (max-width:1024px){
    .services-grid{grid-template-columns:repeat(2,1fr)}
    .cases-grid{grid-template-columns:repeat(2,1fr)}
    .whyus-grid[style*="grid-template-columns:repeat(4"]{grid-template-columns:repeat(2,1fr)!important}
    .solution-item{gap:32px}
    .hero-content{padding:60px 24px}
}

/* Animations */
@keyframes fadeInUp{from{opacity:0;transform:translateY(30px)}to{opacity:1;transform:translateY(0)}}
.hero-badge{animation:fadeInUp .6s ease-out}
.hero-title{animation:fadeInUp .6s ease-out .1s both}
.hero-subtitle{animation:fadeInUp .6s ease-out .15s both}
.hero-desc{animation:fadeInUp .6s ease-out .2s both}
.hero-actions{animation:fadeInUp .6s ease-out .3s both}
[data-aos]{opacity:0;transform:translateY(20px);transition:all .6s cubic-bezier(.4,0,.2,1)}
[data-aos].aos-animate{opacity:1;transform:translateY(0)}
.page-loading-bar{position:fixed;top:0;left:0;height:3px;z-index:9999;background:linear-gradient(90deg,var(--blue-500),var(--blue-300));transition:width .3s ease;width:0}a.tag-pill{text-decoration:none;transition:var(--transition)}a.tag-pill:hover{background:var(--blue-100);border-color:var(--blue-200);color:var(--blue-700)}a.case-card-category{text-decoration:none}a.case-card-category:hover{background:var(--blue-100);color:var(--blue-700)}

/* ==========================================
   Floating Customer Service Widget
   ========================================== */
.float-service{position:fixed;right:24px;bottom:100px;z-index:9990}
.float-service-btn{width:56px;height:56px;border-radius:50%;background:var(--blue-600);color:#fff;display:flex;align-items:center;justify-content:center;cursor:pointer;box-shadow:0 4px 20px rgba(37,99,235,.4);transition:all .3s ease;border:none;outline:none}
.float-service-btn:hover{background:var(--blue-700);transform:scale(1.08);box-shadow:0 6px 28px rgba(37,99,235,.5)}
.float-service-popup{position:absolute;right:0;bottom:70px;width:280px;background:#fff;border-radius:16px;box-shadow:0 8px 40px rgba(0,0,0,.15);opacity:0;visibility:hidden;transform:translateY(12px) scale(.95);transition:all .25s cubic-bezier(.4,0,.2,1);overflow:hidden}
.float-service-popup.open{opacity:1;visibility:visible;transform:translateY(0) scale(1)}
.float-service-popup-header{display:flex;align-items:center;justify-content:space-between;padding:16px 20px;background:var(--blue-600);color:#fff;font-weight:700;font-size:15px}
.float-service-popup-close{background:none;border:none;color:rgba(255,255,255,.8);font-size:18px;cursor:pointer;padding:0 2px;line-height:1;transition:color .2s}
.float-service-popup-close:hover{color:#fff}
.float-service-popup-body{padding:20px;text-align:center}
.float-service-qrcode img{width:160px;height:160px;border-radius:12px;display:block;margin:0 auto 8px;border:1px solid var(--gray-200)}
.float-service-qrcode p{font-size:13px;color:var(--gray-500);margin:0}
.float-service-phone{margin-top:16px;padding-top:16px;border-top:1px solid var(--gray-100)}
.float-service-phone-label{display:block;font-size:12px;color:var(--gray-400);margin-bottom:4px}
.float-service-phone-number{display:block;font-size:20px;font-weight:800;color:var(--gray-900);letter-spacing:.5px}
.float-service-call-btn{display:none;margin-top:16px;padding:12px;border-radius:10px;background:#16a34a;color:#fff;text-decoration:none;font-size:15px;font-weight:700;transition:background .2s}
.float-service-call-btn:hover{background:#15803d}

/* Mobile adjustments */
@media(max-width:768px){
    .float-service{right:16px;bottom:148px}
    .float-service-btn{width:50px;height:50px}
    .float-service-popup{right:-8px;bottom:64px;width:260px}
    .float-service-qrcode img{width:140px;height:140px}
    .float-service-phone-number{font-size:18px}
    .float-service-call-btn{display:block;background:#16a34a;color:#fff}
}
@media(min-width:769px){
    .float-service-call-btn{display:block;background:#eff6ff;color:#2563eb;font-weight:600;border:1px solid #bfdbfe}
    .float-service-call-btn:hover{background:#dbeafe;color:#1d4ed8}
}