/**
 * Global CSS - Design System & Common Styles
 * Purpose: Design Tokens + Base Styles + Universal Components
 */

/* ========== 1. CSS Reset ========== */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    font-size: 16px;
    line-height: 1.6;
    color: #333;
    background: #fff;
    overflow-x: hidden;
}

/* ========== 2. Design Tokens - Color System ========== */
:root {
    --brand-primary: #1A3C5E;
    --brand-secondary: #F0A500;
    --brand-accent: #ffc107;
    --text-primary: #333333;
    --text-secondary: #666666;
    --text-light: #999999;
    --bg-white: #ffffff;
    --bg-light: #f8f9fa;
    --bg-dark: #2c3e50;
    --border-color: #e0e0e0;
    --success: #28a745;
    --error: #dc3545;
}

/* ========== 3. Typography System ========== */
h1 { font-size: 2.5rem; font-weight: 700; line-height: 1.2; margin-bottom: 1.5rem; color: var(--text-primary); }
h2 { font-size: 2rem; font-weight: 700; line-height: 1.3; margin-bottom: 1.25rem; color: var(--text-primary); }
h3 { font-size: 1.75rem; font-weight: 600; line-height: 1.3; margin-bottom: 1rem; color: var(--text-primary); }
h4 { font-size: 1.5rem; font-weight: 600; line-height: 1.4; margin-bottom: 0.875rem; color: var(--text-primary); }
h5 { font-size: 1.25rem; font-weight: 600; line-height: 1.4; margin-bottom: 0.75rem; color: var(--text-primary); }
h6 { font-size: 1.125rem; font-weight: 600; line-height: 1.4; margin-bottom: 0.5rem; color: var(--text-primary); }
p { font-size: 1rem; line-height: 1.6; margin-bottom: 1rem; color: var(--text-secondary); }
.lead { font-size: 1.125rem; font-weight: 300; line-height: 1.7; color: var(--text-secondary); }

/* ========== 4. Spacing Utilities ========== */
.container {
    width: 100%;
    padding-right: 15px;
    padding-left: 15px;
    margin-right: auto;
    margin-left: auto;
}
.section-padding { padding: 4rem 0; }
.mb-0 { margin-bottom: 0 !important; }
.mb-1 { margin-bottom: 0.5rem !important; }
.mb-2 { margin-bottom: 1rem !important; }
.mb-3 { margin-bottom: 1.5rem !important; }
.mb-4 { margin-bottom: 2rem !important; }
.mb-5 { margin-bottom: 3rem !important; }
.mt-0 { margin-top: 0 !important; }
.mt-1 { margin-top: 0.5rem !important; }
.mt-2 { margin-top: 1rem !important; }
.mt-3 { margin-top: 1.5rem !important; }
.mt-4 { margin-top: 2rem !important; }
.mt-5 { margin-top: 3rem !important; }

/* ========== 5. Layout Utilities ========== */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }
.d-flex { display: flex; }
.justify-content-center { justify-content: center; }
.justify-content-between { justify-content: space-between; }
.align-items-center { align-items: center; }

/* ========== 6. Common Components ========== */
/* Buttons - 全站通用按钮 */
.btn {
    display: inline-block;
    padding: 12px 30px;
    font-size: 1rem;
    font-weight: 500;
    text-align: center;
    text-decoration: none;
    border-radius: 4px;
    transition: all 0.3s ease;
    cursor: pointer;
    border: none;
    min-width: 48px;
    min-height: 48px;
}
.btn-primary {
    background-color: var(--brand-primary);
    color: #fff;
}
.btn-primary:hover {
    background-color: var(--brand-secondary);
    color: #fff;
    text-decoration: none;
}
.btn-secondary {
    background-color: var(--brand-secondary);
    color: #fff;
}
.btn-secondary:hover {
    background-color: var(--brand-primary);
    color: #fff;
    text-decoration: none;
}
.btn-accent {
    background-color: var(--brand-accent);
    color: #333;
}
.btn-accent:hover {
    background-color: #e06820;
    color: #333;
    text-decoration: none;
}

/* Cards - 基础卡片样式 */
.card {
    background: #fff;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 1.5rem;
    margin-bottom: 1.5rem;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}
.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
}

/* ========== 7. Responsive Container ========== */
@media (min-width: 576px) { .container { max-width: 540px; } }
@media (min-width: 768px) { .container { max-width: 720px; } }
@media (min-width: 992px) { .container { max-width: 960px; } }
@media (min-width: 1200px) { .container { max-width: 1140px; } }

/* ========== 8. Accessibility ========== */
.skip-link {
    position: absolute;
    top: -40px;
    left: 0;
    background: #000;
    color: #fff;
    padding: 8px 12px;
    text-decoration: none;
    z-index: 10000;
}
.skip-link:focus { top: 0; }

/* ========== 9. Images ========== */
img, .img-fluid {
    max-width: 100%;
    height: auto;
    display: block;
}

/* ========== 10. Links ========== */
a {
    color: var(--brand-primary);
    text-decoration: none;
    transition: color 0.3s ease;
}
a:hover {
    color: var(--brand-secondary);
    text-decoration: underline;
}

/* ========== 11. B2B service visual modules ========== */
.service-proof-panel {
    background: #ffffff;
    border-bottom: 1px solid rgba(15, 31, 30, 0.06);
    padding: clamp(48px, 7vw, 88px) 0;
}

.service-proof-panel--tint {
    background: #FAF7F2;
}

.service-proof-grid {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(360px, 42%);
    gap: clamp(24px, 4vw, 56px);
    align-items: center;
}

.service-proof-grid--reverse {
    grid-template-columns: minmax(360px, 42%) minmax(0, 1fr);
}

.service-proof-copy {
    display: grid;
    gap: 16px;
}

.service-proof-kicker {
    color: #1A3C5E;
    font-size: 0.75rem;
    font-weight: 800;
    letter-spacing: 0.12em;
    text-transform: uppercase;
}

.service-proof-title {
    color: #0F1F1E;
    font-family: 'Plus Jakarta Sans', 'Inter', system-ui, sans-serif;
    font-size: clamp(1.5rem, 2.6vw, 2.25rem);
    font-weight: 800;
    line-height: 1.14;
    letter-spacing: -0.02em;
    margin: 0;
}

.service-proof-text {
    color: #5b6473;
    font-size: clamp(0.9375rem, 1vw, 1.0625rem);
    line-height: 1.65;
    max-width: 68ch;
    margin: 0;
}

.service-proof-list {
    display: grid;
    gap: 10px;
    list-style: none;
    padding: 0;
    margin: 4px 0 0;
}

.service-proof-list li {
    display: flex;
    gap: 10px;
    color: #25302f;
    font-size: 0.9375rem;
    line-height: 1.55;
}

.service-proof-list i {
    color: #1A3C5E;
    flex: 0 0 auto;
    margin-top: 3px;
}

.service-proof-media {
    margin: 0;
    overflow: hidden;
    border-radius: 12px;
    background: #ffffff;
    border: 1px solid rgba(15, 31, 30, 0.08);
    box-shadow: 0 14px 32px rgba(15, 31, 30, 0.10);
}

.service-proof-media img {
    width: 100%;
    aspect-ratio: 16 / 10;
    object-fit: cover;
    display: block;
}

.service-proof-media figcaption {
    padding: 12px 14px 14px;
    color: #5b6473;
    font-size: 0.8125rem;
    line-height: 1.45;
}

.service-proof-stack {
    display: grid;
    gap: 14px;
}

.service-proof-stack .service-proof-media img {
    aspect-ratio: 16 / 7.5;
}

.service-evidence-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: clamp(14px, 2vw, 20px);
    margin-top: clamp(24px, 4vw, 40px);
}

.service-evidence-card {
    overflow: hidden;
    border-radius: 12px;
    background: #ffffff;
    border: 1px solid rgba(15, 31, 30, 0.08);
    box-shadow: 0 8px 22px rgba(15, 31, 30, 0.06);
}

.service-evidence-card img {
    display: block;
    width: 100%;
    aspect-ratio: 16 / 10;
    object-fit: cover;
}

.service-evidence-card__body {
    padding: 16px 18px 18px;
}

.service-evidence-card__body h3 {
    color: #0F1F1E;
    font-size: 1rem;
    font-weight: 800;
    line-height: 1.3;
    margin: 0 0 8px;
}

.service-evidence-card__body p {
    color: #5b6473;
    font-size: 0.875rem;
    line-height: 1.55;
    margin: 0;
}

@media (max-width: 991px) {
    .service-proof-grid,
    .service-proof-grid--reverse {
        grid-template-columns: 1fr;
    }
    .service-proof-grid--reverse .service-proof-media,
    .service-proof-grid--reverse .service-proof-stack {
        order: -1;
    }
    .service-evidence-grid {
        grid-template-columns: 1fr;
    }
}


/* B-opt shared: breadcrumb + page TOC */
.bcrumb{background:#FAF7F2;border-bottom:1px solid rgba(15,31,30,.08)}
.bcrumb__list{max-width:1320px;margin:0 auto;padding:10px clamp(16px,3vw,32px);list-style:none;display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:.8125rem}
.bcrumb__item{display:flex;align-items:center;gap:8px;color:#5b6473}
.bcrumb__item:not(:first-child)::before{content:"/";color:rgba(15,31,30,.3)}
.bcrumb__item a{color:#5b6473;text-decoration:none}
.bcrumb__item a:hover{color:#1A3C5E;text-decoration:underline}
.bcrumb__item--current{color:#1A3C5E;font-weight:600}
.pgtoc{max-width:1320px;margin:clamp(18px,2.5vw,28px) auto 0;padding:0 clamp(16px,3vw,32px)}
.pgtoc__box{background:#fff;border:1px solid rgba(15,31,30,.1);border-radius:12px;padding:14px 20px}
.pgtoc__t{font-weight:700;font-size:.78rem;letter-spacing:.08em;text-transform:uppercase;color:#5b6473;margin:0 0 10px}
.pgtoc__list{list-style:none;margin:0;padding:0;display:flex;flex-wrap:wrap;gap:6px 18px}
.pgtoc__list a{color:#1A3C5E;text-decoration:none;font-size:.9rem;padding:3px 0;border-bottom:1px solid transparent}
.pgtoc__list a:hover{color:#1A3C5E;border-bottom-color:#1A3C5E}

/* ===== Site nav overrides (loaded after dynamic-menu.css) ===== */
/* Logo: full-wordmark SVG (viewBox 320×48). Keep intrinsic ratio via width:auto so icon+wordmark both stay legible. */
.dm-menu .dm-logo img{height:46px;width:auto;max-height:46px;display:block;flex:0 0 auto}
.dm-menu .dm-logo{align-items:center;min-height:46px}
/* active state: restrained brand-blue (underline), NOT a red pill — red stays only on the Request Quote CTA */
.dm-menu .dm-nav-link.active{background:transparent;color:#1493C8;font-weight:700}
.dm-menu .dm-nav-link.active::after{content:"";display:block;height:2px;background:#1A3C5E;border-radius:2px;margin:4px 4px 0}
.dm-menu .dm-nav-link:hover{background:rgba(28,169,224,.08);color:#1493C8}

/* =============================================================
   DESIGN v2 — shared component library  (2026-07-02)
   Motif: "The Line" (dashed amber hairlines + numbered flow +
   stitched connectors). Used across every page after the Home
   flagship. Page-specific hero styles stay inline per page.
   ============================================================= */

/* Tokens */
:root{
  --v2-primary:#DC2626;
  --v2-secondary:#1F2937;
  --v2-accent:#FCD34D;
  --v2-line:rgba(240,165,0,.55);
  --v2-line-strong:rgba(240,165,0,.9);
  --v2-ink:#1F2937;
  --v2-ink-soft:#5b6470;
  --v2-tile:#f6f8fa;
}

/* ---- Scroll reveal (JS toggles .is-visible) ---- */
.v2 .reveal, .v2-reveal{
  opacity:0; transform:translateY(24px);
  transition:opacity .7s cubic-bezier(.2,.7,.2,1), transform .7s cubic-bezier(.2,.7,.2,1);
}
.v2 .reveal.is-visible, .v2-reveal.is-visible{opacity:1; transform:translateY(0);}
[data-v2-reveal-i="1"]{transition-delay:.06s}
[data-v2-reveal-i="2"]{transition-delay:.12s}
[data-v2-reveal-i="3"]{transition-delay:.18s}
[data-v2-reveal-i="4"]{transition-delay:.24s}
[data-v2-reveal-i="5"]{transition-delay:.30s}
[data-v2-reveal-i="6"]{transition-delay:.36s}
[data-v2-reveal-i="7"]{transition-delay:.42s}
[data-v2-reveal-i="8"]{transition-delay:.48s}

/* ---- Section eyebrow + title accent underline ---- */
.v2-section-eyebrow{display:inline-flex;align-items:center;gap:12px;font-size:12.5px;letter-spacing:.20em;text-transform:uppercase;font-weight:700;color:var(--v2-accent);}
.v2-section-eyebrow::before{content:"";display:inline-block;width:22px;height:2px;background:currentColor;opacity:.75;}
.v2-section-title{position:relative;display:inline-block;padding-bottom:16px;color:var(--v2-secondary);font-weight:800;letter-spacing:-.015em;line-height:1.12;font-size:clamp(30px,3.6vw,44px);margin:14px 0 12px;}
.v2-section-title::after{content:"";position:absolute;bottom:0;left:0;width:64px;height:3px;background:linear-gradient(90deg,var(--v2-accent),rgba(240,165,0,.35));border-radius:2px;transform-origin:left;transition:transform .8s cubic-bezier(.2,.7,.2,1) .25s;}
.text-center .v2-section-title::after{left:50%;transform:translateX(-50%);transform-origin:center;}
.v2-reveal .v2-section-title::after{transform:scaleX(0);}
.v2-reveal.is-visible .v2-section-title::after{transform:scaleX(1);}

/* ---- Capabilities marquee (dark strip, pure CSS scroll) ---- */
.v2-caps-strip{background:#111827;color:#fff;position:relative;overflow:hidden;padding:0;}
.v2-caps-line{height:1px;width:100%;background:linear-gradient(90deg,transparent 0%,var(--v2-line) 20%,var(--v2-line) 80%,transparent 100%);}
.v2-caps-marquee{overflow:hidden;padding:20px 0;-webkit-mask-image:linear-gradient(90deg,transparent 0,#000 8%,#000 92%,transparent 100%);mask-image:linear-gradient(90deg,transparent 0,#000 8%,#000 92%,transparent 100%);}
.v2-caps-track{display:flex;width:max-content;animation:v2CapsScroll 42s linear infinite;}
.v2-caps-track > span{display:inline-flex;align-items:center;gap:6px;padding:0 28px;font-size:13.5px;letter-spacing:.14em;text-transform:uppercase;font-weight:700;color:rgba(255,255,255,.85);white-space:nowrap;border-right:1px solid rgba(255,255,255,.10);}
.v2-caps-track > span i{color:var(--v2-accent);font-size:20px;}
@keyframes v2CapsScroll{from{transform:translateX(0);}to{transform:translateX(-50%);}}
@media(max-width:767px){.v2-caps-track{animation-duration:30s;}}

/* ---- Flip cards (perspective 3D) ---- */
.v2-flip-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:22px;perspective:1400px;}
@media(max-width:767px){.v2-flip-grid{grid-template-columns:1fr;}}
.v2-flip-card{position:relative;height:320px;outline:none;}
.v2-flip-inner{position:absolute;inset:0;transition:transform .7s cubic-bezier(.2,.7,.2,1);transform-style:preserve-3d;}
.v2-flip-card:hover .v2-flip-inner,
.v2-flip-card:focus-within .v2-flip-inner,
.v2-flip-card.is-flipped .v2-flip-inner{transform:rotateY(180deg);}
.v2-flip-face{position:absolute;inset:0;border-radius:16px;overflow:hidden;backface-visibility:hidden;-webkit-backface-visibility:hidden;background:#fff;border:1px solid #e6e9ee;box-shadow:0 12px 30px rgba(26,60,94,.08);}
.v2-flip-front img{width:100%;height:100%;object-fit:cover;filter:brightness(.65) saturate(.9);}
.v2-flip-front-body{position:absolute;inset:0;display:flex;flex-direction:column;justify-content:flex-end;padding:20px 22px;color:#fff;background:linear-gradient(180deg,rgba(31,41,55,.10) 0%,rgba(31,41,55,.85) 80%);}
.v2-flip-front-body::before{content:"";position:absolute;top:20px;right:20px;width:38px;height:38px;border-top:1.5px solid var(--v2-accent);border-right:1.5px solid var(--v2-accent);}
.v2-flip-num{position:absolute;top:20px;left:22px;font-size:11.5px;letter-spacing:.18em;text-transform:uppercase;font-weight:700;color:var(--v2-accent);}
.v2-flip-icon{width:44px;height:44px;border-radius:10px;background:rgba(240,165,0,.20);color:var(--v2-accent);display:flex;align-items:center;justify-content:center;font-size:20px;margin-bottom:10px;}
.v2-flip-front h3{font-size:20px;font-weight:800;margin:0 0 10px;color:#fff;}
.v2-flip-hint{font-size:11px;letter-spacing:.16em;text-transform:uppercase;font-weight:700;color:rgba(255,255,255,.75);display:inline-flex;align-items:center;gap:6px;}
.v2-flip-hint i{font-size:14px;color:var(--v2-accent);}
.v2-flip-back{transform:rotateY(180deg);background:linear-gradient(160deg,#1F2937 0%,#0e2540 100%);color:#fff;padding:26px 26px 22px;display:flex;flex-direction:column;}
.v2-flip-back::before{content:"";position:absolute;top:0;left:26px;right:26px;height:2px;background:linear-gradient(90deg,transparent,var(--v2-accent),transparent);}
.v2-flip-num-back{font-size:11px;letter-spacing:.20em;text-transform:uppercase;font-weight:700;color:var(--v2-accent);margin-bottom:12px;display:block;}
.v2-flip-back h3{font-size:20px;font-weight:800;margin:0 0 10px;color:#fff;}
.v2-flip-back p{font-size:14px;color:rgba(255,255,255,.82);line-height:1.55;margin:0 0 12px;}
.v2-flip-list{list-style:none;padding:0;margin:0 0 16px;}
.v2-flip-list li{display:flex;align-items:center;gap:10px;font-size:13.5px;color:rgba(255,255,255,.85);padding:4px 0;}
.v2-flip-list li i{color:var(--v2-accent);font-size:14px;}
.v2-flip-cta{margin-top:auto;align-self:flex-start;display:inline-flex;align-items:center;gap:8px;background:var(--v2-accent);color:#1F2937;font-weight:700;padding:10px 18px;border-radius:6px;text-decoration:none;font-size:13px;transition:transform .2s ease,box-shadow .2s ease;}
.v2-flip-cta:hover{transform:translateY(-2px);box-shadow:0 12px 24px rgba(240,165,0,.32);color:#1F2937;}

/* ---- SVG dashed step connector (used above numbered-step grids) ---- */
.v2-connector-wrap{position:relative;}
.v2-connector{position:absolute;top:26px;left:0;right:0;height:8px;z-index:0;pointer-events:none;}
.v2-connector .draw-line{stroke-dashoffset:100;opacity:0;transition:stroke-dashoffset 1.4s ease .2s,opacity .4s ease;}
.v2-reveal.is-visible .v2-connector .draw-line,
.v2-connector.is-drawn .draw-line{stroke-dashoffset:0;opacity:.7;}
@media(max-width:991px){.v2-connector{display:none;}}

/* ---- Shape divider (curved fade to next section) ---- */
.v2-shape-divider{position:absolute;bottom:-1px;left:0;width:100%;height:80px;z-index:3;pointer-events:none;}
@media(max-width:767px){.v2-shape-divider{height:55px;}}

/* ---- Simple horizontal bar-chart row ---- */
.v2-bar-row{display:grid;grid-template-columns:200px 1fr 120px;gap:16px;align-items:center;padding:12px 0;border-bottom:1px dashed #eef0f3;}
.v2-bar-row:last-child{border-bottom:0;}
.v2-bar-label{font-size:14px;color:var(--v2-secondary);font-weight:700;display:flex;align-items:center;gap:10px;}
.v2-bar-label em{font-style:normal;font-size:11px;letter-spacing:.18em;color:var(--v2-accent);background:rgba(240,165,0,.14);padding:3px 6px;border-radius:3px;font-weight:800;}
.v2-bar-track{position:relative;height:12px;background:repeating-linear-gradient(90deg,transparent 0 79px,rgba(0,0,0,.05) 79px 80px);border-radius:6px;overflow:hidden;}
.v2-bar-fill{position:absolute;top:0;bottom:0;width:0;background:linear-gradient(90deg,rgba(240,165,0,.85),rgba(240,165,0,.55));border-radius:6px;transition:width 1.2s cubic-bezier(.2,.7,.2,1) .2s;}
.v2-bar-fill.is-primary{background:linear-gradient(90deg,#DC2626,#F0A500);}
.v2-bar-fill.is-ship{background:linear-gradient(90deg,#1A3C5E,#4a7fb0);}
.v2-reveal.is-visible .v2-bar-fill,
.v2-bar-row.is-drawn .v2-bar-fill{width:var(--w);}
.v2-bar-value{font-size:12.5px;color:var(--v2-ink-soft);font-weight:700;text-align:right;letter-spacing:.02em;}
@media(max-width:767px){.v2-bar-row{grid-template-columns:120px 1fr 80px;gap:10px;}.v2-bar-label{font-size:13px;}}

/* ---- Unified card polish ---- */
.v2-card{border-radius:16px;background:linear-gradient(180deg,#fff 0%,#fbfcfd 100%);border:1px solid #ebeef2;transition:transform .25s cubic-bezier(.2,.7,.2,1),box-shadow .25s ease,border-color .25s ease;}
.v2-card:hover{transform:translateY(-4px);box-shadow:0 22px 44px rgba(26,60,94,.09);border-color:rgba(240,165,0,.35);}

/* ---- Blueprint grid overlay (motif backdrop) ---- */
.v2-blueprint{position:absolute;inset:0;pointer-events:none;background:repeating-linear-gradient(0deg,transparent 0,transparent 79px,rgba(240,165,0,.05) 79px,rgba(240,165,0,.05) 80px),repeating-linear-gradient(90deg,transparent 0,transparent 79px,rgba(240,165,0,.05) 79px,rgba(240,165,0,.05) 80px);opacity:.85;mix-blend-mode:screen;}

/* ---- Section top hairline (motif line) ---- */
.v2-hairline-top{position:relative;}
.v2-hairline-top::before{content:"";position:absolute;top:0;left:15%;right:15%;height:1px;background:linear-gradient(90deg,transparent,rgba(240,165,0,.35),transparent);z-index:2;}

/* ---- Prefers reduced motion ---- */
@media (prefers-reduced-motion: reduce){
  .v2-reveal,.v2 .reveal{opacity:1 !important;transform:none !important;transition:none !important;}
  .v2-caps-track{animation:none !important;}
  .v2-flip-inner{transition:none !important;}
  .v2-connector .draw-line{transition:none !important;stroke-dashoffset:0 !important;opacity:.7 !important;}
  .v2-bar-fill{transition:none !important;}
  .v2-reveal.is-visible .v2-section-title::after{transform:scaleX(1) !important;transition:none !important;}
}

/* ---- Shared JS behavior hooks: pages just add class="v2-reveal" -- JS in Home already handles observed intersect via .reveal; for non-home pages add tiny inline observer at page bottom (see rollout template) ---- */