/* ===== Breadcrumb ===== */
.vd-breadcrumb{padding:90px 0 0;background:var(--white);font-size:.85rem;color:var(--slate-400)}
.vd-breadcrumb .wrap{display:flex;gap:8px;align-items:center;padding-top:16px;padding-bottom:16px;border-bottom:1px solid var(--slate-100)}
.vd-breadcrumb a{color:var(--slate-500);transition:color .2s}
.vd-breadcrumb a:hover{color:var(--blue-600)}
.vd-breadcrumb .current{color:var(--blue-600);font-weight:600}

/* ===== Page Hero ===== */
.vd-hero{min-height:62vh;padding:80px 0 72px;background:var(--slate-900);position:relative;overflow:hidden;display:flex;align-items:center}
.vd-hero-bg{position:absolute;inset:0;background-image:url('https://images.unsplash.com/photo-1531497865144-0464ef8fb9a9?w=1920&q=90&auto=format&fit=crop');background-size:cover;background-position:center;opacity:.15;z-index:1;pointer-events:none}
.vd-hero::before{content:'';position:absolute;inset:0;background:linear-gradient(135deg,rgba(10,36,99,.95) 0%,rgba(10,36,99,.85) 50%,rgba(18,70,184,.75) 100%);z-index:1}
.vd-hero::after{content:'';position:absolute;inset:0;background:radial-gradient(ellipse 800px 500px at 70% 30%,rgba(59,130,246,.2),transparent 60%),linear-gradient(rgba(255,255,255,.025) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.025) 1px,transparent 1px);background-size:auto,60px 60px,60px 60px;z-index:2;pointer-events:none}
.vd-hero-inner{position:relative;z-index:3;display:grid;grid-template-columns:1.2fr 1fr;gap:56px;align-items:center}
.vd-hero-left{max-width:580px}
.vd-hero-badge{display:inline-flex;align-items:center;gap:10px;padding:7px 18px;border-radius:100px;background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.15);color:rgba(255,255,255,.8);font-size:.82rem;font-weight:500;margin-bottom:28px}
.vd-hero-badge .dot{width:7px;height:7px;border-radius:50%;background:var(--blue-400);box-shadow:0 0 8px var(--blue-400)}
.vd-hero-title{font-size:2.6rem;font-weight:800;letter-spacing:-.03em;line-height:1.15;color:#fff;margin-bottom:24px}
.vd-hero-title .hl{background:linear-gradient(135deg,var(--blue-300),var(--blue-200));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.vd-hero-sub{font-size:1rem;color:rgba(255,255,255,.6);line-height:1.7;margin-bottom:32px}
.vd-hero-cta{display:flex;gap:14px;flex-wrap:wrap;margin-bottom:28px}
.vd-hero-tags{display:flex;flex-wrap:wrap;gap:8px}
.vd-hero-tags span{font-size:.78rem;padding:5px 14px;border-radius:6px;background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.1);color:rgba(255,255,255,.7);font-weight:500}
.vd-hero-right{display:flex;justify-content:center}
.vd-hero-card{width:100%;max-width:380px;background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.12);border-radius:var(--radius-xl);padding:32px;backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);box-shadow:0 16px 48px rgba(0,0,0,.2)}
.vd-hero-card-head{display:flex;align-items:center;gap:14px;margin-bottom:24px}
.vd-hero-card-ico{width:48px;height:48px;border-radius:12px;background:linear-gradient(135deg,var(--blue-500),var(--blue-700));display:flex;align-items:center;justify-content:center;flex-shrink:0;box-shadow:0 6px 16px rgba(37,99,235,.3)}
.vd-hero-card-ico svg{width:24px;height:24px;color:#fff}
.vd-hero-card-eyebrow{font-size:.72rem;color:var(--blue-300);font-weight:600;letter-spacing:.05em;text-transform:uppercase;margin-bottom:2px}
.vd-hero-card-title{font-size:1.2rem;font-weight:700;color:#fff;letter-spacing:-.01em}
.vd-hero-card-archs{display:flex;flex-direction:column;gap:10px}
.vd-hero-card-arch{display:flex;align-items:center;gap:10px}
.vd-hero-card-arch .tag{display:inline-flex;align-items:center;justify-content:center;width:42px;height:24px;border-radius:5px;background:var(--blue-500);color:#fff;font-size:.72rem;font-weight:700;flex-shrink:0}
.vd-hero-card-arch .desc{font-size:.84rem;color:rgba(255,255,255,.7);font-weight:500}
.vd-hero-card-divider{height:1px;background:rgba(255,255,255,.1);margin:24px 0}
.vd-hero-card-stats{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.vd-hero-card-stat{text-align:center}
.vd-hero-card-stat .num{font-size:1.5rem;font-weight:800;background:linear-gradient(135deg,#fff,var(--blue-300));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;letter-spacing:-.02em;margin-bottom:2px}
.vd-hero-card-stat .num span{font-size:.9rem;font-weight:600}
.vd-hero-card-stat .label{font-size:.76rem;color:rgba(255,255,255,.5)}

/* ===== Pain Points ===== */
.vd-pain{padding:88px 0;background:var(--white)}
.vd-pain-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:20px}
.vd-pain-card{background:var(--slate-50);border:1px solid var(--slate-200);border-radius:var(--radius-lg);padding:28px 24px;transition:all .35s var(--ease-out)}
.vd-pain-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);border-color:var(--blue-200);background:var(--white)}
.vd-pain-ico{width:48px;height:48px;border-radius:12px;background:rgba(37,99,235,.08);display:flex;align-items:center;justify-content:center;margin-bottom:18px}
.vd-pain-ico svg{width:24px;height:24px;color:#2563EB}
.vd-pain-card h3{font-size:1rem;font-weight:700;color:var(--slate-800);margin-bottom:10px;letter-spacing:-.01em}
.vd-pain-card p{font-size:.85rem;color:var(--slate-500);line-height:1.6}

/* ===== Overview ===== */
.vd-overview{padding:88px 0;background:var(--slate-50)}
.vd-ov-layout{display:grid;grid-template-columns:1.3fr 1fr;gap:64px;align-items:center}
.vd-ov-text .eyebrow{margin-bottom:14px}
.vd-ov-text .s-title{margin-bottom:20px}
.vd-ov-desc{font-size:.95rem;color:var(--slate-600);line-height:1.75;margin-bottom:16px}
.vd-ov-desc strong{color:var(--blue-600)}
.vd-ov-features{display:grid;gap:12px;margin-top:24px}
.vd-ov-feature{display:flex;align-items:center;gap:10px;font-size:.9rem;color:var(--slate-700);font-weight:500}
.vd-ov-feature svg{width:20px;height:20px;color:var(--blue-500);flex-shrink:0}
.vd-ov-visual{display:grid;grid-template-columns:1fr 1fr;gap:20px}
.vd-ov-stat{background:var(--white);border:1px solid var(--slate-200);border-radius:var(--radius-lg);padding:32px 24px;text-align:center;box-shadow:var(--shadow-sm);transition:all .3s var(--ease)}
.vd-ov-stat:hover{transform:translateY(-4px);box-shadow:var(--shadow-md)}
.vd-ov-stat .num{font-size:2.4rem;font-weight:800;background:linear-gradient(135deg,var(--blue-600),var(--blue-400));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;letter-spacing:-.03em;margin-bottom:6px}
.vd-ov-stat .num span{font-size:1.2rem;font-weight:700}
.vd-ov-stat .label{font-size:.85rem;color:var(--slate-500)}

/* ===== Architecture Comparison ===== */
.vd-arch-compare{padding:88px 0;background:var(--white)}
.vd-arch-cards{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.vd-arch-card{background:var(--white);border:2px solid var(--slate-200);border-radius:var(--radius-xl);overflow:hidden;transition:all .35s var(--ease-out);position:relative}
.vd-arch-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg)}
.vd-arch-card.featured{border-color:var(--blue-400);box-shadow:0 8px 32px rgba(37,99,235,.12)}
.vd-arch-card-head{padding:28px 28px 20px;position:relative}
.vd-arch-card-head.vdi{background:linear-gradient(135deg,rgba(37,99,235,.06),rgba(37,99,235,.02))}
.vd-arch-card-head.idv{background:linear-gradient(135deg,rgba(37,99,235,.1),rgba(37,99,235,.04))}
.vd-arch-card-head.voi{background:linear-gradient(135deg,rgba(37,99,235,.06),rgba(37,99,235,.02))}
.vd-arch-badge{display:inline-block;padding:4px 14px;border-radius:6px;background:var(--blue-600);color:#fff;font-size:.82rem;font-weight:700;letter-spacing:.03em;margin-bottom:12px}
.vd-arch-card-head h3{font-size:1.15rem;font-weight:700;color:var(--slate-900);margin-bottom:4px}
.vd-arch-en{font-size:.78rem;color:var(--slate-400);letter-spacing:.02em}
.vd-arch-tag{position:absolute;top:20px;right:20px;padding:3px 10px;border-radius:100px;background:var(--blue-500);color:#fff;font-size:.72rem;font-weight:600}
.vd-arch-card-body{padding:24px 28px 28px}
.vd-arch-desc{font-size:.88rem;color:var(--slate-600);line-height:1.65;margin-bottom:18px}
.vd-arch-pros,.vd-arch-cons{display:flex;flex-direction:column;gap:6px;margin-bottom:14px}
.vd-arch-pros span{font-size:.84rem;color:var(--green);font-weight:500;display:flex;gap:6px}
.vd-arch-cons span{font-size:.84rem;color:var(--slate-400);font-weight:500}
.vd-arch-best{padding:10px 14px;border-radius:8px;background:var(--blue-50);color:var(--blue-600);font-size:.82rem;font-weight:600;text-align:center}
.vd-arch-fusion{display:flex;gap:20px;align-items:center;margin-top:32px;padding:28px 32px;background:linear-gradient(135deg,var(--blue-50),var(--blue-100));border-radius:var(--radius-lg);border:1px solid var(--blue-200)}
.vd-arch-fusion-ico{width:56px;height:56px;border-radius:14px;background:linear-gradient(135deg,var(--blue-500),var(--blue-700));display:flex;align-items:center;justify-content:center;flex-shrink:0}
.vd-arch-fusion-ico svg{width:28px;height:28px;color:#fff}
.vd-arch-fusion-text h3{font-size:1.1rem;font-weight:700;color:var(--slate-800);margin-bottom:6px}
.vd-arch-fusion-text p{font-size:.9rem;color:var(--slate-600);line-height:1.6}

/* ===== Tech Architecture Diagram ===== */
.vd-tech-arch{padding:88px 0;background:var(--slate-900);overflow:hidden;position:relative}
.vd-tech-arch::before{content:'';position:absolute;inset:0;background:radial-gradient(ellipse 800px 400px at 50% 0%,rgba(37,99,235,.12),transparent 60%);pointer-events:none}
.vd-tech-arch .s-title{color:#fff}
.vd-tech-arch .s-sub{color:rgba(255,255,255,.5)}
.vd-tech-arch .eyebrow{color:var(--blue-400)}
.vd-tech-arch .eyebrow::before{background:var(--blue-400)}
.vd-tech-layers{display:flex;flex-direction:column;gap:12px;position:relative;z-index:1}
.vd-tech-layer{display:grid;grid-template-columns:60px 220px 1fr;gap:24px;align-items:center;padding:20px 28px;background:rgba(255,255,255,.04);border:1px solid rgba(255,255,255,.08);border-radius:var(--radius);backdrop-filter:blur(10px);transition:all .3s var(--ease)}
.vd-tech-layer:hover{background:rgba(255,255,255,.07);border-color:rgba(59,130,246,.3);transform:translateX(8px)}
.vd-tech-layer-num{font-size:1.6rem;font-weight:800;color:rgba(255,255,255,.15);letter-spacing:-.03em}
.vd-tech-layer-info h3{font-size:1rem;font-weight:700;color:#fff;margin-bottom:4px}
.vd-tech-layer-info p{font-size:.82rem;color:rgba(255,255,255,.5)}
.vd-tech-layer-items{display:flex;flex-wrap:wrap;gap:8px}
.vd-tech-layer-items span{font-size:.78rem;padding:5px 12px;border-radius:6px;background:var(--layer-bg);border:1px solid rgba(255,255,255,.06);color:rgba(255,255,255,.75);font-weight:500}

/* ===== Core Features ===== */
.vd-features{padding:88px 0;background:var(--white)}
.vd-features-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.vd-feature-card{background:var(--white);border:1px solid var(--slate-200);border-radius:var(--radius-lg);padding:32px 28px;transition:all .35s var(--ease-out);box-shadow:var(--shadow-sm)}
.vd-feature-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg);border-color:var(--blue-200)}
.vd-feature-ico{width:52px;height:52px;border-radius:14px;background:linear-gradient(135deg,var(--blue-50),var(--blue-100));display:flex;align-items:center;justify-content:center;margin-bottom:20px}
.vd-feature-ico svg{width:26px;height:26px;color:var(--blue-600)}
.vd-feature-card h3{font-size:1.1rem;font-weight:700;color:var(--slate-900);margin-bottom:10px;letter-spacing:-.01em}
.vd-feature-card p{font-size:.88rem;color:var(--slate-500);line-height:1.65;margin-bottom:16px}
.vd-feature-tags{display:flex;flex-wrap:wrap;gap:6px}
.vd-feature-tags span{font-size:.76rem;padding:4px 10px;border-radius:5px;background:var(--slate-100);color:var(--slate-600);font-weight:500}

/* ===== Comparison Table ===== */
.vd-compare{padding:88px 0;background:var(--slate-50)}
.vd-compare-table{background:var(--white);border-radius:var(--radius-xl);overflow:hidden;border:1px solid var(--slate-200);box-shadow:var(--shadow)}
.vd-cmp-row{display:grid;grid-template-columns:1fr 1.5fr 1.5fr;border-bottom:1px solid var(--slate-100)}
.vd-cmp-row:last-child{border-bottom:none}
.vd-cmp-row:not(.vd-cmp-head):hover{background:var(--blue-50)}
.vd-cmp-head{background:var(--slate-800)}
.vd-cmp-head>div{color:#fff;font-weight:700;font-size:.92rem;padding:18px 24px;text-align:center}
.vd-cmp-head .vd-cmp-col-label{text-align:left}
.vd-cmp-row:not(.vd-cmp-head)>div{padding:18px 24px;font-size:.88rem;display:flex;align-items:center;gap:8px}
.vd-cmp-col-label{font-weight:600;color:var(--slate-700)}
.vd-cmp-col-pc{color:var(--slate-500)}
.vd-cmp-col-pc svg{width:18px;height:18px;color:#94A3B8;flex-shrink:0}
.vd-cmp-col-vdi{color:var(--slate-700);font-weight:500}
.vd-cmp-col-vdi svg{width:18px;height:18px;color:#2563EB;flex-shrink:0}

/* ===== Scenarios ===== */
.vd-scenarios{padding:88px 0;background:var(--white)}
.vd-scene-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.vd-scene-card{border-radius:var(--radius-lg);overflow:hidden;background:var(--white);border:1px solid var(--slate-200);box-shadow:var(--shadow-sm);transition:all .4s var(--ease-out)}
.vd-scene-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg)}
.vd-scene-img{height:160px;background-size:cover;background-position:center;position:relative}
.vd-scene-img::after{content:'';position:absolute;inset:0;background:linear-gradient(to bottom,transparent 40%,rgba(10,36,99,.3))}
.vd-scene-body{padding:24px}
.vd-scene-body h3{font-size:1.1rem;font-weight:700;color:var(--slate-900);margin-bottom:10px;letter-spacing:-.01em}
.vd-scene-body p{font-size:.86rem;color:var(--slate-500);line-height:1.6;margin-bottom:14px}
.vd-scene-tags{display:flex;flex-wrap:wrap;gap:6px}
.vd-scene-tags span{font-size:.76rem;padding:4px 10px;border-radius:5px;background:var(--blue-50);color:var(--blue-700);font-weight:500}

/* ===== Deploy Flow ===== */
.vd-deploy{padding:88px 0;background:var(--slate-50)}
.vd-deploy-steps{display:grid;grid-template-columns:repeat(7,1fr);gap:16px;position:relative}
.vd-step{background:var(--white);border:1px solid var(--slate-200);border-radius:var(--radius);padding:24px 20px;text-align:center;transition:all .35s var(--ease-out);position:relative}
.vd-step:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);border-color:var(--blue-200)}
.vd-step-num{width:40px;height:40px;border-radius:50%;background:linear-gradient(135deg,var(--blue-500),var(--blue-700));color:#fff;font-size:1.1rem;font-weight:800;display:flex;align-items:center;justify-content:center;margin:0 auto 16px;box-shadow:0 4px 12px rgba(37,99,235,.25)}
.vd-step h3{font-size:.92rem;font-weight:700;color:var(--slate-800);margin-bottom:8px}
.vd-step p{font-size:.8rem;color:var(--slate-500);line-height:1.55}

/* ===== FAQ ===== */
.vd-faq{padding:88px 0;background:var(--white)}
.vd-faq-list{max-width:820px;margin:0 auto}
.vd-faq-item{border:1px solid var(--slate-200);border-radius:var(--radius);margin-bottom:12px;overflow:hidden;transition:all .25s var(--ease)}
.vd-faq-item:hover{border-color:var(--blue-200)}
.vd-faq-item.open{border-color:var(--blue-300);box-shadow:var(--shadow-sm)}
.vd-faq-q{padding:20px 24px;font-size:.95rem;font-weight:600;color:var(--slate-800);cursor:pointer;display:flex;align-items:center;gap:12px;user-select:none}
.vd-faq-q span{display:flex;align-items:center;justify-content:center;width:28px;height:28px;border-radius:8px;background:var(--blue-50);color:var(--blue-600);font-size:.82rem;font-weight:800;flex-shrink:0}
.vd-faq-q::after{content:'+';margin-left:auto;font-size:1.4rem;color:var(--slate-400);transition:transform .25s}
.vd-faq-item.open .vd-faq-q::after{transform:rotate(45deg)}
.vd-faq-a{max-height:0;overflow:hidden;transition:max-height .3s var(--ease);padding:0 24px;font-size:.9rem;color:var(--slate-600);line-height:1.7}
.vd-faq-item.open .vd-faq-a{max-height:200px;padding:0 24px 20px}

/* ===== Responsive ===== */
@media(max-width:968px){
  .vd-hero{min-height:auto;padding:70px 0 60px}
  .vd-hero-inner{grid-template-columns:1fr;gap:40px}
  .vd-hero-title{font-size:2.1rem}
  .vd-pain-grid{grid-template-columns:repeat(2,1fr)}
  .vd-ov-layout{grid-template-columns:1fr;gap:40px}
  .vd-arch-cards{grid-template-columns:1fr}
  .vd-tech-layer{grid-template-columns:50px 1fr;gap:16px;padding:18px 20px}
  .vd-tech-layer-items{grid-column:1/-1;margin-top:4px}
  .vd-features-grid{grid-template-columns:repeat(2,1fr)}
  .vd-scene-grid{grid-template-columns:repeat(2,1fr)}
  .vd-deploy-steps{grid-template-columns:repeat(4,1fr)}
  .vd-cmp-row{grid-template-columns:100px 1fr 1fr}
  .vd-cmp-row:not(.vd-cmp-head)>div,.vd-cmp-head>div{padding:14px 14px;font-size:.82rem}
}
@media(max-width:640px){
  .vd-hero{padding:60px 20px 50px}
  .vd-hero-title{font-size:1.6rem}
  .vd-hero-cta{flex-direction:column;gap:12px;width:100%}
  .vd-hero-cta .btn-primary,.vd-hero-cta .btn-outline{width:100%;justify-content:center}
  .vd-pain-grid{grid-template-columns:1fr}
  .vd-ov-visual{grid-template-columns:1fr 1fr}
  .vd-features-grid{grid-template-columns:1fr}
  .vd-scene-grid{grid-template-columns:1fr}
  .vd-deploy-steps{grid-template-columns:repeat(2,1fr)}
  .vd-cmp-row{grid-template-columns:80px 1fr 1fr}
  .vd-cmp-row:not(.vd-cmp-head)>div,.vd-cmp-head>div{padding:12px 10px;font-size:.76rem}
}

/* SVG装饰 - 浮动图形（vd-arch-compare 区域） */
.vd-arch-compare{position:relative}
.vd-arch-compare::before{content:'';position:absolute;top:0;left:0;right:0;bottom:0;background-image:url('data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='200' height='200' viewBox='0 0 200 200'%3E%3Ccircle cx='40' cy='40' r='3' fill='%232563EB' opacity='0.1'/%3E%3Ccircle cx='160' cy='60' r='5' fill='%231E50CC' opacity='0.08'/%3E%3Ccircle cx='80' cy='150' r='4' fill='%2360A5FA' opacity='0.1'/%3E%3Ccircle cx='170' cy='170' r='6' fill='%232563EB' opacity='0.06'/%3E%3C/svg%3E');background-repeat:repeat;background-size:200px 200px;opacity:.5;pointer-events:none;z-index:0}