/* ===== 代塔供应链 官网样式 ===== */

/* ---------- Reset & Base ---------- */
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:"Microsoft YaHei","PingFang SC","Helvetica Neue",Arial,sans-serif;color:#333;background:#fff;line-height:1.6;overflow-x:hidden}

/* ---------- Scroll Animations ---------- */
.reveal{opacity:0;transform:translateY(40px);transition:opacity .7s ease,transform .7s ease}
.reveal.visible{opacity:1;transform:translateY(0)}
.reveal-left{opacity:0;transform:translateX(-40px);transition:opacity .7s ease,transform .7s ease}
.reveal-left.visible{opacity:1;transform:translateX(0)}
.reveal-right{opacity:0;transform:translateX(40px);transition:opacity .7s ease,transform .7s ease}
.reveal-right.visible{opacity:1;transform:translateX(0)}
.reveal-scale{opacity:0;transform:scale(.9);transition:opacity .7s ease,transform .7s ease}
.reveal-scale.visible{opacity:1;transform:scale(1)}
.reveal-delay-1{transition-delay:.1s}
.reveal-delay-2{transition-delay:.2s}
.reveal-delay-3{transition-delay:.3s}
.reveal-delay-4{transition-delay:.4s}
.reveal-delay-5{transition-delay:.5s}

/* ---------- Reading Progress ---------- */
.progress-bar{position:fixed;top:0;left:0;width:0;height:3px;background:linear-gradient(90deg,#2563eb,#60a5fa);z-index:1001;transition:width .1s}

/* ---------- Back to Top ---------- */
.back-top{position:fixed;bottom:40px;right:40px;width:50px;height:50px;background:linear-gradient(135deg,#1a365d,#2563eb);color:#fff;border:0;border-radius:50%;font-size:22px;cursor:pointer;z-index:999;opacity:0;visibility:hidden;transform:translateY(20px);transition:.3s;box-shadow:0 4px 15px rgba(37,99,235,.3)}
.back-top.show{opacity:1;visibility:visible;transform:translateY(0)}
.back-top:hover{transform:translateY(-3px);box-shadow:0 6px 25px rgba(37,99,235,.4)}

/* ---------- Navigation ---------- */
.nav{position:fixed;top:0;left:0;right:0;z-index:1000;background:rgba(255,255,255,.96);backdrop-filter:blur(14px);border-bottom:1px solid rgba(219,228,240,.86);box-shadow:0 8px 28px rgba(15,45,82,.045);transition:.3s}
.nav::after{content:'';position:absolute;left:0;right:0;bottom:-1px;height:3px;background:linear-gradient(90deg,rgba(21,94,239,0),rgba(21,94,239,.56),rgba(56,189,248,.42),rgba(21,94,239,0));pointer-events:none}
.nav.scrolled{box-shadow:0 10px 32px rgba(15,45,82,.09)}
.nav-inner{max-width:1200px;margin:0 auto;display:flex;align-items:center;padding:0 20px;height:72px}
.nav-logo{display:flex;align-items:center;gap:10px;text-decoration:none}
.nav-logo-img{height:40px;width:auto;object-fit:contain;border-radius:4px}
.nav-logo-text{font-size:20px;font-weight:700;color:#1a365d}
.nav-logo-sub{font-size:12px;color:#2b6cb0;margin-top:-2px}
.nav-links{display:flex;list-style:none;margin-left:auto;gap:4px}
.nav-links a{display:block;padding:9px 18px;color:#45566f;text-decoration:none;font-size:15px;transition:.2s;border-radius:999px;position:relative}
.nav-links a::after{content:'';position:absolute;bottom:2px;left:50%;transform:translateX(-50%);width:0;height:2px;background:#2563eb;transition:.3s;border-radius:1px}
.nav-links a:hover{color:#155eef;background:#eef5ff}
.nav-links a.active{color:#155eef;font-weight:700;background:#f3f7ff}
.nav-links a.active::after{width:22px;bottom:4px}
.mobile-toggle{display:none;margin-left:auto;background:0;border:0;font-size:24px;cursor:pointer;color:#1a365d;padding:8px}

/* ---------- Hero ---------- */
.hero{min-height:100vh;display:flex;align-items:center;justify-content:center;text-align:center;padding:120px 20px 80px;background:linear-gradient(135deg,#0f2140 0%,#1a3a6e 30%,#2563eb 70%,#3b82f6 100%);position:relative;overflow:hidden}
.hero-bg-overlay{position:absolute;inset:0;background:url('../assets/building.png') center center/cover no-repeat;opacity:.15;filter:brightness(.7)}
.hero::before{content:'';position:absolute;inset:0;background:url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.03'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");opacity:.5;z-index:1}
.hero .parallax-layer{position:absolute;inset:0;background:url("data:image/svg+xml,%3Csvg width='100' height='100' viewBox='0 0 100 100' xmlns='http://www.w3.org/2000/svg'%3E%3Ccircle cx='50' cy='50' r='1' fill='%23ffffff' fill-opacity='0.1'/%3E%3C/svg%3E");transform:translateZ(0);will-change:transform}
.hero-content{position:relative;z-index:2}
.hero h1{font-size:clamp(2rem,5vw,4rem);color:#fff;font-weight:700;position:relative;z-index:1;line-height:1.2;margin-bottom:16px;text-shadow:0 2px 20px rgba(0,0,0,.2)}
.hero p{font-size:clamp(1rem,1.8vw,1.3rem);color:rgba(255,255,255,.9);max-width:700px;margin:0 auto 40px;position:relative;z-index:1;line-height:1.8}
.hero-btns{display:flex;gap:16px;justify-content:center;flex-wrap:wrap;position:relative;z-index:1}
.hero-btn{display:inline-block;padding:14px 36px;border-radius:8px;font-size:16px;font-weight:600;text-decoration:none;transition:.3s}
.hero-btn-primary{background:#fff;color:#1a365d}
.hero-btn-primary:hover{transform:translateY(-3px);box-shadow:0 8px 30px rgba(255,255,255,.3)}
.hero-btn-outline{border:2px solid rgba(255,255,255,.6);color:#fff}
.hero-btn-outline:hover{background:rgba(255,255,255,.1);border-color:#fff;transform:translateY(-3px)}
.hero-stats{display:flex;gap:40px;justify-content:center;margin-top:60px;flex-wrap:wrap;position:relative;z-index:1}
.hero-stat{text-align:center}
.hero-stat-num{font-size:clamp(1.8rem,3vw,3rem);font-weight:800;color:#fff;display:block}
.hero-stat-label{font-size:14px;color:rgba(255,255,255,.75);margin-top:4px}
.scroll-indicator{position:absolute;bottom:30px;left:50%;transform:translateX(-50%);color:rgba(255,255,255,.6);font-size:12px;animation:bounce 2s infinite;z-index:1}
@keyframes bounce{0%,100%{transform:translateX(-50%) translateY(0)}50%{transform:translateX(-50%) translateY(8px)}}

/* ---------- Video Section ---------- */
.video-section{background:#0f1f36;padding:80px 20px}
.video-section .section-title h2{color:#fff}
.video-section .section-title p{color:rgba(255,255,255,.7)}
.video-wrapper{max-width:900px;margin:0 auto;border-radius:16px;overflow:hidden;box-shadow:0 20px 60px rgba(0,0,0,.4);position:relative}
.video-wrapper video{width:100%;display:block;border-radius:16px}

/* ---------- Section Common ---------- */
.section{padding:90px 20px;position:relative}
.section-inner{max-width:1200px;margin:0 auto}
.section-title{text-align:center;margin-bottom:60px}
.section-title h2{font-size:clamp(1.6rem,2.5vw,2.2rem);color:#1a365d;font-weight:700;margin-bottom:12px}
.section-title p{color:#666;font-size:16px;max-width:600px;margin:0 auto;line-height:1.8}
.platform-section-title{max-width:980px;margin-left:auto;margin-right:auto}
.section-bg{background:#f8faff}
.section-divider{height:1px;background:linear-gradient(90deg,transparent,#e2e8f0,transparent);margin:0 auto;max-width:1200px}

/* ---------- About ---------- */
.about-grid{display:grid;grid-template-columns:1fr 1fr;gap:60px;align-items:center}
.about-content h3{font-size:24px;color:#1a365d;margin-bottom:20px}
.about-content p{color:#555;font-size:15px;line-height:1.9;margin-bottom:16px}
.about-building{display:flex;align-items:center;justify-content:center}
.about-building-img{width:100%;max-width:500px;border-radius:16px;box-shadow:0 12px 40px rgba(0,0,0,.12);transition:transform .4s ease}
.about-building-img:hover{transform:scale(1.02)}

/* About Layout Section - 仓储布局 */
.about-layout-section{margin-top:60px;padding:40px;background:#fff;border-radius:20px;box-shadow:0 4px 24px rgba(0,0,0,.06)}
.about-layout-header{text-align:center;margin-bottom:36px}
.about-layout-header h3{font-size:22px;color:#1a365d;margin-bottom:8px}
.about-layout-header p{color:#2563eb;font-size:15px;font-weight:500}
.about-layout-content{display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:center}
.about-layout-info{display:flex;flex-direction:column;gap:24px}
.layout-point{display:flex;gap:16px;align-items:flex-start}
.layout-point-icon{width:44px;height:44px;background:#eff6ff;border-radius:12px;display:flex;align-items:center;justify-content:center;font-size:20px;flex-shrink:0}
.layout-point h4{font-size:16px;color:#1a365d;margin-bottom:4px}
.layout-point p{font-size:14px;color:#666;line-height:1.7}
.about-layout-map img{width:100%;border-radius:12px;box-shadow:0 4px 20px rgba(0,0,0,.08)}

.about-stats-row{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;margin-top:50px}
.about-stat-item{text-align:center;padding:24px;background:#fff;border-radius:12px;box-shadow:0 2px 12px rgba(0,0,0,.06);transition:.3s}
.about-stat-item:hover{transform:translateY(-3px);box-shadow:0 6px 25px rgba(0,0,0,.1)}
.about-stat-item .num{font-size:28px;font-weight:800;color:#2563eb;display:block}
.about-stat-item .label{font-size:13px;color:#666;margin-top:6px}

/* Timeline */
.timeline{position:relative;padding:20px 0;max-width:700px;margin:30px auto 0}
.timeline::before{content:'';position:absolute;left:100px;top:0;bottom:0;width:2px;background:linear-gradient(180deg,#2563eb,#60a5fa)}
.timeline-item{display:flex;gap:30px;margin-bottom:24px;align-items:flex-start;opacity:0;transform:translateX(-20px);transition:opacity .6s,transform .6s}
.timeline-item.visible{opacity:1;transform:translateX(0)}
.timeline-year{width:70px;text-align:right;font-weight:700;color:#2563eb;font-size:15px;flex-shrink:0;padding-top:2px}
.timeline-dot{width:14px;height:14px;background:#2563eb;border-radius:50%;flex-shrink:0;margin-top:4px;position:relative;z-index:1;border:3px solid #fff;box-shadow:0 0 0 2px #2563eb;transition:.3s}
.timeline-item.visible .timeline-dot{animation:pulse-dot .5s ease}
@keyframes pulse-dot{0%{transform:scale(0)}50%{transform:scale(1.3)}100%{transform:scale(1)}}
.timeline-text{flex:1;color:#555;font-size:14px;line-height:1.7}

/* ---------- Services - Full Chain ---------- */
.service-fullchain{margin-bottom:50px}
.service-section-heading{font-size:22px;color:#1a365d;text-align:center;margin-bottom:24px;font-weight:700}
.service-fullchain-img{max-width:1000px;margin:0 auto;border-radius:16px;overflow:hidden;box-shadow:0 8px 30px rgba(0,0,0,.08);border:1px solid #eef2f6}
.service-fullchain-img img{width:100%;display:block}

/* ---------- Services - Tab System ---------- */
.service-tabs{margin-top:20px}
.service-tab-nav{display:flex;gap:8px;justify-content:center;flex-wrap:wrap;margin-bottom:32px}
.service-tab-btn{padding:12px 28px;border:2px solid #e2e8f0;border-radius:50px;background:#fff;color:#555;font-size:14px;font-weight:500;cursor:pointer;transition:.3s}
.service-tab-btn:hover{border-color:#2563eb;color:#2563eb;background:#f0f4ff}
.service-tab-btn.active{background:linear-gradient(135deg,#1a365d,#2563eb);color:#fff;border-color:transparent;box-shadow:0 4px 15px rgba(37,99,235,.3)}

.service-tab-panel{display:none;animation:fadeIn .4s ease}
.service-tab-panel.active{display:block}
@keyframes fadeIn{from{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}

.service-tab-content{display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:start;background:#fff;border-radius:20px;padding:36px;box-shadow:0 4px 20px rgba(0,0,0,.05);border:1px solid #eef2f6}
.service-tab-text h3{font-size:22px;color:#1a365d;margin-bottom:16px}
.service-tab-text>p{color:#666;font-size:15px;line-height:1.8;margin-bottom:20px}
.service-tab-list{list-style:none;margin-bottom:20px}
.service-tab-list li{padding:8px 0 8px 24px;position:relative;font-size:14px;color:#555;line-height:1.7}
.service-tab-list li::before{content:'';position:absolute;left:0;top:14px;width:8px;height:8px;background:linear-gradient(135deg,#2563eb,#60a5fa);border-radius:50%}
.service-tab-list li strong{color:#1a365d}
.service-tab-tags{display:flex;flex-wrap:wrap;gap:8px}
.service-tab-tags .tag{background:#f0f4ff;color:#2563eb;padding:4px 14px;border-radius:20px;font-size:12px;font-weight:500}

.service-tab-image{display:flex;flex-direction:column;gap:16px}
.service-tab-image img{width:100%;border-radius:12px;box-shadow:0 4px 16px rgba(0,0,0,.08);transition:transform .3s}
.service-tab-image img:hover{transform:scale(1.02)}
.service-tab-images{display:flex;flex-direction:column;gap:16px}
.service-tab-images img{width:100%;border-radius:12px;box-shadow:0 4px 16px rgba(0,0,0,.08)}

/* Ops Framework Diagram */
.ops-framework{background:linear-gradient(135deg,#f8faff,#eff6ff);border-radius:16px;padding:28px;border:1px solid #dbeafe}
.ops-layer{margin-bottom:20px;padding:20px;background:#fff;border-radius:12px;box-shadow:0 2px 8px rgba(0,0,0,.04);border-left:4px solid #2563eb}
.ops-layer:last-child{margin-bottom:0;border-left-color:#60a5fa}
.ops-layer-title{font-size:15px;font-weight:700;color:#1a365d;margin-bottom:10px}
.ops-layer-items{display:flex;flex-wrap:wrap;gap:8px}
.ops-layer-items span{background:#eff6ff;color:#2563eb;padding:6px 14px;border-radius:6px;font-size:13px;font-weight:500}

/* B2B Diagram */
.b2b-diagram{background:linear-gradient(135deg,#f8faff,#eff6ff);border-radius:16px;padding:36px;border:1px solid #dbeafe}
.b2b-flow{display:flex;align-items:center;justify-content:center;gap:16px;margin-bottom:30px}
.b2b-node{background:#fff;padding:16px 28px;border-radius:12px;font-size:16px;font-weight:600;color:#555;box-shadow:0 2px 10px rgba(0,0,0,.06);border:2px solid #e2e8f0}
.b2b-node.highlight{background:linear-gradient(135deg,#1a365d,#2563eb);color:#fff;border-color:transparent;box-shadow:0 4px 20px rgba(37,99,235,.3)}
.b2b-arrow{font-size:24px;color:#2563eb;font-weight:700}
.b2b-features{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.b2b-feature-item{background:#fff;padding:14px 18px;border-radius:10px;font-size:14px;color:#555;box-shadow:0 2px 8px rgba(0,0,0,.04);text-align:center;transition:.3s}
.b2b-feature-item:hover{transform:translateY(-2px);box-shadow:0 4px 16px rgba(37,99,235,.1);color:#1a365d}

/* Process Flow */
.process-flow{display:flex;align-items:center;justify-content:center;gap:8px;flex-wrap:wrap;padding:20px;background:linear-gradient(135deg,#f8faff,#eff6ff);border-radius:16px;border:1px solid #dbeafe}
.process-step{text-align:center;padding:16px 12px;background:#fff;border-radius:12px;min-width:80px;box-shadow:0 2px 8px rgba(0,0,0,.04);transition:.3s}
.process-step:hover{transform:translateY(-3px);box-shadow:0 6px 20px rgba(37,99,235,.12)}
.process-step-icon{font-size:28px;margin-bottom:6px}
.process-step-text{font-size:12px;color:#555;font-weight:500}
.process-arrow{color:#2563eb;font-size:20px;font-weight:700}

/* Return Flow */
.return-flow{display:flex;flex-direction:column;align-items:center;gap:16px;padding:28px;background:linear-gradient(135deg,#f8faff,#eff6ff);border-radius:16px;border:1px solid #dbeafe}
.return-step{display:flex;align-items:center;gap:16px;background:#fff;padding:14px 24px;border-radius:12px;width:100%;max-width:300px;box-shadow:0 2px 8px rgba(0,0,0,.04)}
.return-step-num{width:36px;height:36px;background:linear-gradient(135deg,#1a365d,#2563eb);color:#fff;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:14px;font-weight:700;flex-shrink:0}
.return-step-text{font-size:15px;color:#1a365d;font-weight:600}
.return-branch{display:flex;gap:12px;width:100%;max-width:300px}
.return-branch-item{flex:1;padding:10px 14px;border-radius:8px;text-align:center;font-size:13px;font-weight:600}
.return-branch-item.ok{background:#ecfdf5;color:#059669}
.return-branch-item.ng{background:#fef2f2;color:#dc2626}

/* ---------- Platform ---------- */
.platform-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.platform-content-block{max-width:980px;margin-left:auto;margin-right:auto}
.platform-section-visual{height:360px;margin:0 auto 24px;border-radius:16px;overflow:hidden;border:1px solid #eef2f6;box-shadow:0 10px 30px rgba(15,45,82,.07);background:#f8fbff;display:flex;align-items:center;justify-content:center;padding:26px}
.platform-section-visual img{width:auto;max-width:min(100%,620px);height:auto;max-height:100%;display:block;object-fit:contain}
.platform-grid-unified{grid-template-columns:repeat(4,1fr)}
.platform-item{text-align:center;padding:28px;background:#fff;border-radius:12px;border:1px solid #eef2f6;transition:.3s;cursor:default}
.platform-item:hover{transform:translateY(-4px);box-shadow:0 8px 30px rgba(37,99,235,.1);border-color:#2563eb30}
.platform-icon{width:48px;height:48px;margin:0 auto 12px;background:#f0f4ff;color:#2563eb;border-radius:10px;display:flex;align-items:center;justify-content:center;font-size:20px;transition:.3s}
.platform-icon svg{width:26px;height:26px;stroke:currentColor;stroke-width:2;fill:none;stroke-linecap:round;stroke-linejoin:round}
.platform-item:hover .platform-icon{background:#2563eb;color:#fff;transform:scale(1.1) rotate(-5deg)}
.platform-item span{font-size:14px;color:#444;font-weight:500}
.platform-item small{display:block;color:#999;font-size:12px;margin-top:4px;font-weight:400}

/* AI Capability Accordion */
.ai-matrix-layout{display:grid;grid-template-columns:.86fr 1.14fr;gap:34px;align-items:stretch;max-width:1180px;margin:0 auto}
.ai-matrix-visual{background:#061838;border:1px solid rgba(120,210,255,.3);border-radius:16px;overflow:hidden;box-shadow:0 16px 42px rgba(15,45,82,.12);min-height:100%}
.ai-matrix-visual img{width:100%;height:100%;display:block;object-fit:cover}
.ai-matrix-layout-stacked{display:block}
.ai-matrix-layout-stacked .ai-matrix-visual{height:360px;margin:0 auto 24px;min-height:0;background:#f8fbff;border-color:#eef2f6;box-shadow:0 10px 30px rgba(15,45,82,.07);display:flex;align-items:center;justify-content:center;padding:26px}
.ai-matrix-layout-stacked .ai-matrix-visual img{width:auto;max-width:min(100%,620px);height:auto;max-height:100%;object-fit:contain}
.ai-matrix-layout-stacked .ai-accordion{max-width:980px;margin:0 auto}
.ai-accordion{display:grid;gap:16px}
.ai-accordion-item{background:#fff;border:1px solid #e3ebf7;border-radius:14px;box-shadow:0 10px 30px rgba(15,45,82,.045);overflow:hidden;transition:border-color .25s,box-shadow .25s}
.ai-accordion-item[open]{border-color:#b9d4ff;box-shadow:0 16px 40px rgba(37,99,235,.1)}
.ai-accordion-item summary{list-style:none;cursor:pointer;display:grid;grid-template-columns:76px 1fr 34px;gap:20px;align-items:center;padding:22px 24px;min-height:98px}
.ai-accordion-item summary::-webkit-details-marker{display:none}
.ai-summary-icon{width:76px;height:54px;border-radius:14px;background:#eff6ff;color:#2563eb;display:flex;align-items:center;justify-content:center;font-size:24px;overflow:hidden;box-shadow:0 8px 20px rgba(15,45,82,.08)}
.ai-summary-icon img{width:100%;height:100%;display:block;object-fit:cover}
.ai-summary-icon svg{width:28px;height:28px;stroke:currentColor;stroke-width:2;fill:none;stroke-linecap:round;stroke-linejoin:round}
.ai-summary-copy b{display:block;color:#0f2d52;font-size:20px;line-height:1.35;margin-bottom:4px}
.ai-summary-copy small{display:block;color:#64748b;font-size:14px;line-height:1.5}
.ai-summary-arrow{width:34px;height:34px;border-radius:50%;background:#f4f7fb;color:#2563eb;display:flex;align-items:center;justify-content:center;font-size:20px;transition:transform .25s,background .25s}
.ai-accordion-item[open] .ai-summary-arrow{transform:rotate(180deg);background:#e0ecff}
.ai-accordion-panel{border-top:1px solid #eef2f6;padding:22px 24px 26px;background:linear-gradient(180deg,#fff,#f8fbff)}
.ai-accordion-panel>p{color:#4b5563;font-size:15px;line-height:1.85;margin:0 0 18px}
.ai-bullet-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px 28px}
.ai-bullet-grid ul{list-style:none;display:grid;gap:12px;margin:0}
.ai-bullet-grid li{position:relative;padding-left:20px;color:#4b5563;font-size:14px;line-height:1.7}
.ai-bullet-grid li::before{content:'';position:absolute;left:0;top:10px;width:7px;height:7px;border-radius:50%;background:#2563eb;box-shadow:0 0 0 4px rgba(37,99,235,.1)}
.ai-bullet-grid b{display:block;color:#0f2d52;font-size:15px;margin-bottom:2px}
.ai-bullet-grid span{display:block}

/* AI Section - 五自能力 */
.ai-wuzi-section{display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:center;margin-bottom:50px}
.ai-wuzi-img img{width:100%;border-radius:16px;box-shadow:0 8px 30px rgba(0,0,0,.08)}
.ai-wuzi-cards{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.ai-wuzi-card{background:#fff;padding:20px;border-radius:12px;border:1px solid #eef2f6;transition:.3s;box-shadow:0 2px 8px rgba(0,0,0,.03)}
.ai-wuzi-card:hover{transform:translateY(-3px);box-shadow:0 6px 20px rgba(37,99,235,.1);border-color:#2563eb30}
.ai-wuzi-icon{font-size:28px;margin-bottom:8px}
.ai-wuzi-card h4{font-size:15px;color:#1a365d;margin-bottom:6px;font-weight:700}
.ai-wuzi-card p{font-size:13px;color:#666;line-height:1.7}
.ai-wuzi-card:last-child{grid-column:1/-1}
.wuzi-method-simple{display:grid;grid-template-columns:.86fr 1.14fr;gap:44px;align-items:stretch;max-width:1050px;margin:0 auto}
.wuzi-method-visual{background:#fff;border:1px solid #eef2f6;border-radius:16px;padding:14px;box-shadow:0 10px 30px rgba(15,45,82,.055);min-height:100%;overflow:hidden}
.wuzi-method-visual img{width:100%;height:100%;display:block;border-radius:12px;object-fit:cover;object-position:center}
.wuzi-method-stacked{display:block}
.wuzi-method-stacked .wuzi-method-visual{height:360px;margin:0 auto 24px;min-height:0;display:flex;align-items:center;justify-content:center;padding:26px}
.wuzi-method-stacked .wuzi-method-visual img{width:auto;max-width:min(100%,500px);height:auto;max-height:100%;object-fit:contain}
.wuzi-method-stacked .wuzi-flow-list{max-width:980px;margin:0 auto}
.wuzi-flow-list{display:grid;gap:12px}
.wuzi-flow-item{display:grid;grid-template-columns:52px 1fr;gap:16px;align-items:start;background:#fff;border:1px solid #e8eef8;border-radius:12px;padding:18px 20px;box-shadow:0 6px 20px rgba(15,45,82,.035)}
.wuzi-flow-item span{width:42px;height:42px;border-radius:12px;background:#eff6ff;color:#2563eb;display:flex;align-items:center;justify-content:center;font-size:14px;font-weight:800}
.wuzi-flow-item h3{font-size:17px;color:#0f2d52;margin-bottom:4px}
.wuzi-flow-item p{font-size:14px;color:#64748b;line-height:1.65;margin:0}

/* AI Section - 四层架构 */
.ai-arch-section{margin-bottom:10px}
.ai-arch-img{max-width:1000px;margin:0 auto;border-radius:16px;overflow:hidden;box-shadow:0 8px 30px rgba(0,0,0,.08);border:1px solid #eef2f6}
.ai-arch-img img{width:100%;display:block}

/* AI Sub Section */
.ai-sub-section{margin-bottom:20px;padding-bottom:16px;border-bottom:1px solid #f0f4ff}
.ai-sub-section:last-child{border-bottom:none;margin-bottom:0;padding-bottom:0}
.ai-sub-section h4{font-size:16px;color:#1a365d;margin-bottom:10px;font-weight:700;padding-left:12px;border-left:3px solid #2563eb}

/* ---------- Partners (PPT layout) ---------- */
.partner-platform-section{margin-bottom:24px}
.platform-logo-row{display:flex;flex-wrap:wrap;justify-content:center;gap:20px}
.platform-logo-item{background:#fff;padding:14px 20px;border-radius:10px;border:1px solid #eef2f6;display:flex;align-items:center;justify-content:center;height:70px;min-width:100px;transition:.3s;box-shadow:0 1px 4px rgba(0,0,0,.03)}
.platform-logo-item:hover{transform:translateY(-3px);box-shadow:0 6px 20px rgba(37,99,235,.1);border-color:#2563eb30}
.platform-logo-item img{max-height:44px;max-width:80px;object-fit:contain;filter:grayscale(.2);transition:.3s}
.platform-logo-item:hover img{filter:grayscale(0)}

.partner-stats-row{display:flex;flex-wrap:wrap;justify-content:center;gap:24px;padding:32px 0;margin:24px 0;border-top:1px solid #eef2f6;border-bottom:1px solid #eef2f6}
.partner-stat{text-align:center;min-width:120px}
.partner-stat-num{font-size:26px;font-weight:800;color:#2563eb;display:block}
.partner-stat-label{font-size:13px;color:#666;margin-top:4px}

.brand-section-heading{text-align:center;font-size:16px;color:#1a365d;margin-bottom:20px;font-weight:600}
.brand-logo-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(140px,1fr));gap:16px;justify-items:center}
.brand-logo-item{background:#fff;padding:16px;border-radius:12px;border:1px solid #eef2f6;display:flex;align-items:center;justify-content:center;height:90px;width:100%;transition:.3s;box-shadow:0 1px 4px rgba(0,0,0,.03)}
.brand-logo-item:hover{transform:translateY(-4px);box-shadow:0 8px 25px rgba(37,99,235,.1);border-color:#2563eb30}
.brand-logo-item img{max-width:100%;max-height:60px;object-fit:contain;filter:grayscale(.3);transition:.3s}
.brand-logo-item:hover img{filter:grayscale(0)}

/* ---------- ESG / Green Supply Chain ---------- */
.esg-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:28px}
.esg-card{background:#fff;border-radius:16px;overflow:hidden;border:1px solid #eef2f6;transition:.3s;box-shadow:0 2px 12px rgba(0,0,0,.04)}
.esg-card:hover{transform:translateY(-5px);box-shadow:0 10px 40px rgba(5,150,105,.12);border-color:#05966930}
.esg-card-img{height:200px;overflow:hidden}
.esg-card-img img{width:100%;height:100%;object-fit:cover;transition:transform .4s}
.esg-card:hover .esg-card-img img{transform:scale(1.05)}
.esg-card-body{padding:28px}
.esg-card-icon{font-size:36px;margin-bottom:12px}
.esg-card-body h3{font-size:18px;color:#1a365d;margin-bottom:10px;font-weight:700}
.esg-card-body p{font-size:14px;color:#555;line-height:1.8}

/* ---------- News ---------- */
.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.news-card{background:#fff;border-radius:12px;overflow:hidden;border:1px solid #eef2f6;transition:.3s}
.news-card:hover{transform:translateY(-5px);box-shadow:0 10px 35px rgba(0,0,0,.08)}
.news-img{height:180px;display:flex;align-items:center;justify-content:center;font-size:40px;transition:.3s;overflow:hidden;background:#f6f9ff}
.news-img img{width:100%;height:100%;display:block;object-fit:cover}
.news-card:hover .news-img{transform:scale(1.02)}
.news-body{padding:20px}
.news-date{font-size:12px;color:#999}
.news-body h4{font-size:15px;color:#1a365d;margin:8px 0;line-height:1.5;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-body p{font-size:13px;color:#777;line-height:1.7;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}

/* ---------- Contact ---------- */
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:60px}
.contact-info h3{font-size:22px;color:#1a365d;margin-bottom:8px}
.contact-info>p{color:#666;margin-bottom:30px}
.contact-item{display:flex;align-items:center;gap:16px;margin-bottom:20px;transition:.2s}
.contact-item:hover{transform:translateX(5px)}
.contact-icon{width:44px;height:44px;background:#eff6ff;border-radius:10px;display:flex;align-items:center;justify-content:center;font-size:18px;flex-shrink:0}
.contact-item h4{font-size:13px;color:#999;margin-bottom:2px}
.contact-item p{font-size:15px;color:#333;font-weight:500}
.contact-page-grid .contact-info{padding-top:8px}
.contact-page-grid .contact-info>p{margin-bottom:36px}
.contact-page-grid .contact-item{gap:20px;margin-bottom:30px;align-items:flex-start}
.contact-page-grid .contact-icon{width:50px;height:50px;border-radius:12px;font-size:19px}
.contact-page-grid .contact-item h4{margin-bottom:6px}
.contact-page-grid .contact-item p{line-height:1.75}
.contact-form{background:#fff;padding:36px;border-radius:16px;box-shadow:0 4px 20px rgba(0,0,0,.04);border:1px solid #eef2f6}
.contact-form h3{font-size:18px;color:#1a365d;margin-bottom:20px}
.form-group{margin-bottom:16px}
.form-group input,.form-group textarea,.form-group select{width:100%;padding:12px 16px;border:1px solid #dde3e9;border-radius:8px;font-size:14px;outline:0;transition:.2s;font-family:inherit}
.form-group input:focus,.form-group textarea:focus,.form-group select:focus{border-color:#2563eb;box-shadow:0 0 0 3px rgba(37,99,235,.1)}
.form-group textarea{height:120px;resize:vertical}
.captcha-image-box{min-height:74px;padding:10px 14px;border:1px solid #dbe7f7;border-radius:8px;background:#f8fbff;color:#0f2d52;font-size:14px;font-weight:700;display:flex;align-items:center;justify-content:center}
.captcha-image{max-width:100%;height:52px;display:block;object-fit:contain}
.captcha-image[hidden]{display:none}
.captcha-image-placeholder{display:block;text-align:center}
.captcha-refresh{height:44px;padding:0 14px;border:1px solid #cfe0ff;border-radius:8px;background:#fff;color:#2563eb;font-size:14px;font-weight:700;cursor:pointer;transition:.2s;font-family:inherit}
.captcha-refresh:hover{border-color:#2563eb;background:#eff6ff}
.captcha-refresh:disabled{cursor:not-allowed;opacity:.55}
.form-status{min-height:22px;margin:-2px 0 14px;font-size:14px;line-height:1.6}
.form-status.success{color:#059669}
.form-status.error{color:#dc2626}
body.modal-open{overflow:hidden}
.captcha-modal[hidden]{display:none}
.captcha-modal{position:fixed;inset:0;z-index:1200;display:flex;align-items:center;justify-content:center;padding:22px}
.captcha-modal-backdrop{position:absolute;inset:0;background:rgba(8,40,90,.48);backdrop-filter:blur(6px)}
.captcha-dialog{position:relative;z-index:1;width:min(100%,420px);padding:30px;background:#fff;border:1px solid #dbe7f7;border-radius:16px;box-shadow:0 24px 70px rgba(15,45,82,.24)}
.captcha-dialog-close{position:absolute;top:14px;right:14px;width:34px;height:34px;border:0;border-radius:50%;background:#f4f7fb;color:#64748b;font-size:24px;line-height:1;cursor:pointer}
.captcha-dialog-close:hover{background:#e8eef8;color:#0f2d52}
.captcha-dialog h3{font-size:20px;color:#0f2d52;margin-bottom:8px}
.captcha-dialog-desc{font-size:14px;color:#64748b;line-height:1.7;margin-bottom:18px}
.captcha-input{width:100%;margin-top:12px;padding:12px 16px;border:1px solid #dde3e9;border-radius:8px;font-size:14px;outline:0;transition:.2s;font-family:inherit}
.captcha-input:focus{border-color:#2563eb;box-shadow:0 0 0 3px rgba(37,99,235,.1)}
.captcha-modal-status{margin:10px 0 16px}
.captcha-actions{display:grid;grid-template-columns:auto 1fr;gap:10px}
.captcha-actions .captcha-refresh{height:46px}
.captcha-actions .submit-btn{width:auto;padding-left:20px;padding-right:20px}
.submit-btn{width:100%;padding:14px;background:linear-gradient(135deg,#1a365d,#2563eb);color:#fff;border:0;border-radius:8px;font-size:16px;font-weight:600;cursor:pointer;transition:.3s;position:relative;overflow:hidden}
.submit-btn::after{content:'';position:absolute;top:50%;left:50%;width:0;height:0;background:rgba(255,255,255,.1);border-radius:50%;transition:width .6s,height .6s;transform:translate(-50%,-50%)}
.submit-btn:hover{transform:translateY(-2px);box-shadow:0 6px 20px rgba(37,99,235,.3)}
.submit-btn:disabled,.submit-btn:disabled:hover{cursor:not-allowed;opacity:.72;transform:none;box-shadow:none}
.submit-btn:active::after{width:300px;height:300px}

/* ---------- Footer ---------- */
.footer{background:#08285a;color:rgba(255,255,255,.78);padding:46px 20px 26px}
.footer-inner{max-width:1200px;margin:0 auto}
.footer-grid{display:grid;grid-template-columns:1fr 1.3fr 1.1fr 1.4fr;gap:44px;margin-bottom:40px}
.footer-grid-compact{grid-template-columns:.9fr 1.25fr 1.2fr 1fr 1fr;gap:30px;align-items:start}
.footer-about h3{color:#fff;font-size:18px;margin-bottom:12px}
.footer-about p{font-size:14px;line-height:1.8}
.footer-links h4{color:#fff;font-size:17px;line-height:1.35;margin-bottom:18px;font-weight:800}
.footer-links ul{list-style:none}
.footer-links li{margin-bottom:8px}
.footer-links a{color:rgba(255,255,255,.76);text-decoration:none;font-size:14px;transition:.2s}
.footer-links a:hover{color:#fff;padding-left:3px}
.footer-qrcodes{min-width:150px}
.footer-qr-grid{display:grid;grid-template-columns:repeat(2, minmax(68px, 1fr));gap:12px;align-items:start}
.footer-qr-item{display:flex;flex-direction:column;align-items:center;gap:7px;color:rgba(255,255,255,.82);font-size:12px;line-height:1.35;text-align:center}
.footer-qr-item img{width:68px;height:68px;object-fit:cover;background:#fff;border-radius:7px;padding:4px;box-shadow:0 8px 18px rgba(0,0,0,.18)}
.footer-bottom{border-top:1px solid rgba(255,255,255,.1);padding-top:24px;display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px;font-size:13px}

/* ---------- Contact Page ---------- */
.contact-hero{padding:120px 20px 54px;background:linear-gradient(135deg,#f6f9ff 0%,#eef6ff 58%,#fff 100%);overflow:hidden}
.contact-hero-inner{max-width:1180px;margin:0 auto;display:grid;grid-template-columns:1.25fr .75fr;gap:28px;align-items:center}
.contact-eyebrow{display:inline-block;color:#2563eb;font-size:14px;font-weight:800;margin-bottom:14px}
.contact-hero h1{font-size:40px;line-height:1.18;color:#0f2d52;margin-bottom:14px;letter-spacing:0}
.contact-hero p{font-size:16px;color:#4b5563;line-height:1.85;max-width:640px;margin-bottom:22px}
.contact-visual{position:relative;min-height:260px;display:flex;align-items:flex-end;justify-content:center}
.contact-visual::before{content:'';position:absolute;width:210px;height:210px;border-radius:50%;background:#dbeafe;bottom:12px;right:58px;z-index:0}
.contact-visual img{position:relative;z-index:1;max-width:min(260px,100%);max-height:300px;object-fit:contain;filter:drop-shadow(0 16px 24px rgba(15,45,82,.16))}
.contact-page-grid{align-items:start}
.contact-detail-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px}
.contact-detail-card{background:#fff;border:1px solid #e8eef8;border-radius:16px;padding:28px;box-shadow:0 10px 30px rgba(15,45,82,.05)}
.contact-detail-card h3{font-size:20px;color:#0f2d52;margin-bottom:18px}
.contact-list{display:grid;gap:16px}
.contact-line{display:grid;grid-template-columns:44px 1fr;gap:14px;align-items:start}
.contact-line-icon{width:44px;height:44px;border-radius:12px;background:#eff6ff;color:#2563eb;display:flex;align-items:center;justify-content:center;font-size:20px}
.contact-line h4{font-size:13px;color:#64748b;margin-bottom:3px}
.contact-line p{font-size:15px;color:#1f2937;font-weight:600;line-height:1.65;margin:0}
.contact-purpose-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-top:28px}
.contact-purpose{background:#fff;border:1px solid #e8eef8;border-radius:14px;padding:22px;min-height:150px;box-shadow:0 8px 24px rgba(15,45,82,.035)}
.contact-purpose h3{font-size:18px;color:#0f2d52;margin-bottom:10px}
.contact-purpose p{font-size:14px;color:#64748b;line-height:1.75;margin:0}
.contact-qrcode-panel{display:flex;gap:18px;flex-wrap:wrap}
.contact-qrcode{width:132px;text-align:center;color:#4b5563;font-size:13px;font-weight:700}
.contact-qrcode img{width:132px;height:132px;object-fit:cover;background:#fff;border:1px solid #e5e7eb;border-radius:12px;padding:8px;margin-bottom:10px}

/* ---------- Subpage Header ---------- */
.subpage-header{background:linear-gradient(135deg,#0f2140,#1a3a6e);padding:120px 20px 60px;text-align:center;color:#fff}
.subpage-header h1{font-size:clamp(1.8rem,3vw,2.8rem);font-weight:700;margin-bottom:12px}
.subpage-header p{font-size:16px;color:rgba(255,255,255,.8);max-width:600px;margin:0 auto}
.breadcrumb{font-size:13px;color:rgba(255,255,255,.6);margin-top:16px}
.breadcrumb a{color:rgba(255,255,255,.7);text-decoration:none}
.breadcrumb a:hover{color:#fff}

/* ---------- Responsive ---------- */
@media(max-width:968px){
  .about-grid,.contact-grid{grid-template-columns:1fr;gap:40px}
  .about-layout-content{grid-template-columns:1fr}
  .service-tab-content{grid-template-columns:1fr}
  .services-grid,.news-grid{grid-template-columns:1fr 1fr}
  .platform-grid{grid-template-columns:repeat(2,1fr)}
  .platform-grid-unified{grid-template-columns:repeat(2,1fr)}
  .platform-section-visual{height:320px}
  .ai-matrix-layout{grid-template-columns:1fr;gap:24px}
  .ai-matrix-visual{height:360px}
  .ai-matrix-layout-stacked .ai-matrix-visual{height:320px}
  .ai-bullet-grid{grid-template-columns:1fr}
  .about-stats-row{grid-template-columns:repeat(2,1fr)}
  .footer-grid,.footer-grid-compact{grid-template-columns:1fr 1fr}
  .contact-hero-inner,.contact-detail-grid{grid-template-columns:1fr}
  .contact-purpose-grid{grid-template-columns:1fr}
  .contact-visual{min-height:240px;justify-content:flex-start}
  .b2b-flow{flex-direction:column}
  .process-flow{flex-direction:column}
  .process-arrow{transform:rotate(90deg)}
  .brand-logo-grid{grid-template-columns:repeat(auto-fill,minmax(110px,1fr))}
  .ai-wuzi-section{grid-template-columns:1fr}
  .wuzi-method-simple{grid-template-columns:1fr;gap:28px}
  .wuzi-method-visual{max-width:560px;height:360px;margin:0 auto}
  .wuzi-method-stacked .wuzi-method-visual{max-width:none;height:320px}
  .esg-grid{grid-template-columns:1fr 1fr}
  .partner-stats-row{gap:16px}
  .partner-stat{min-width:100px}
}
@media(max-width:640px){
  .footer-grid{grid-template-columns:1fr}
  .footer-grid-compact{grid-template-columns:1fr}
  .footer-qr-grid{grid-template-columns:repeat(2, minmax(74px, 96px));justify-content:start}
  .footer-qr-item img{width:74px;height:74px}
  .contact-hero{padding-top:112px}
  .contact-hero h1{font-size:34px}
  .contact-visual::before{width:190px;height:190px;right:auto;left:26px}
  .contact-qrcode{width:118px}
  .contact-qrcode img{width:118px;height:118px}
}
@media(max-width:640px){
  .reveal,.reveal-left,.reveal-right,.reveal-scale,.timeline-item{opacity:1;transform:none}
  .nav-links{display:none;position:absolute;top:72px;left:0;right:0;background:#fff;flex-direction:column;padding:12px;border-bottom:1px solid #eee;box-shadow:0 4px 10px rgba(0,0,0,.05)}
  .nav-links.active{display:flex}
  .nav-links a{padding:12px 16px}
  .nav-links a::after{display:none}
  .mobile-toggle{display:block}
  .nav-inner{height:68px}
  .nav-logo-img{height:34px}
  .subpage-header{padding:104px 16px 44px}
  .subpage-header p{font-size:14px;line-height:1.75}
  .section-title{margin-bottom:34px}
  .section-title p{font-size:14px;line-height:1.75}
  .hero{padding-left:18px;padding-right:18px}
  .hero h1{font-size:30px;line-height:1.28}
  .hero p{max-width:300px;font-size:14px;line-height:1.9;margin-bottom:32px;overflow-wrap:anywhere}
  .hero-btns{gap:12px}
  .hero-btn{min-width:144px;padding:13px 22px;text-align:center}
  .services-grid,.news-grid,.platform-grid{grid-template-columns:1fr}
  .platform-grid-unified{grid-template-columns:1fr}
  .platform-section-visual{height:210px;padding:18px;border-radius:14px}
  .platform-section-visual img{max-width:100%;max-height:176px}
  .platform-item{padding:18px 16px;display:grid;grid-template-columns:46px 1fr;gap:14px;align-items:center;text-align:left}
  .platform-item .platform-icon{margin:0}
  .platform-item small{margin-top:2px}
  .ai-matrix-visual{height:280px}
  .ai-matrix-layout-stacked .ai-matrix-visual{height:230px;padding:18px;border-radius:14px}
  .ai-matrix-layout-stacked .ai-matrix-visual img{max-height:194px}
  .ai-accordion-item summary{grid-template-columns:44px 1fr 30px;gap:12px;padding:18px 16px}
  .ai-summary-icon{width:44px;height:44px;font-size:21px}
  .ai-summary-copy b{font-size:17px}
  .ai-summary-copy small{font-size:13px}
  .ai-accordion-panel{padding:18px 16px 22px}
  .hero-stats{gap:20px}
  .about-stats-row{grid-template-columns:repeat(2,1fr)}
  .timeline::before{left:30px}
  .timeline-item{gap:16px}
  .timeline-year{width:40px;font-size:13px}
  .section{padding:60px 16px}
  .service-tab-btn{padding:8px 16px;font-size:13px}
  .service-tab-content{padding:20px}
  .brand-logo-grid{grid-template-columns:repeat(3,1fr);gap:10px}
  .brand-logo-item{height:70px;padding:10px}
  .b2b-features{grid-template-columns:1fr}
  .return-branch{flex-direction:column}
  .video-wrapper{border-radius:12px}
  .esg-grid{grid-template-columns:1fr}
  .esg-card-img,.news-img{height:168px}
  .ai-wuzi-cards{grid-template-columns:1fr}
  .wuzi-method-visual{height:280px}
  .wuzi-method-stacked .wuzi-method-visual{height:230px}
  .wuzi-method-stacked .wuzi-method-visual img{max-width:100%;max-height:194px}
  .wuzi-flow-item{grid-template-columns:44px 1fr;padding:16px}
  .wuzi-flow-item span{width:38px;height:38px}
  .platform-logo-row{gap:12px}
  .partner-stats-row{gap:12px}
  .partner-stat{min-width:80px}
}