/* global React */

// ============================================================
// China CDN, Hero
// Tagline: CN2 GIA 專線直連內地，毋須 ICP 備案，平均延時 < 50ms
// Visual: route comparison (public backbone vs CN2 GIA dedicated)
// ============================================================
const CH_HERO_CSS = `
.CH-hero{position:relative;background:linear-gradient(180deg,#FAFAFE 0%,#F6F4FB 100%);font-family:'Inter','Noto Sans HK','Noto Sans TC',sans-serif;color:#0F2A47;overflow:hidden;padding:112px 0 96px}
.CH-hero::before{content:'';position:absolute;inset:0;background-image:linear-gradient(rgba(139,92,246,0.10) 1.5px,transparent 1.5px),linear-gradient(90deg,rgba(139,92,246,0.10) 1.5px,transparent 1.5px);background-size:64px 64px;mask-image:radial-gradient(ellipse 70% 60% at 50% 35%,#000 25%,transparent 80%);-webkit-mask-image:radial-gradient(ellipse 70% 60% at 50% 35%,#000 25%,transparent 80%);pointer-events:none}
.CH-hero::after{content:'';position:absolute;top:-100px;right:-10%;width:55%;height:80%;background:radial-gradient(ellipse 50% 40% at 60% 30%,rgba(139,92,246,0.10) 0%,transparent 70%);pointer-events:none}

.CH-hero-inner{position:relative;display:grid;grid-template-columns:1.05fr 1fr;gap:64px;align-items:center}

/* Left column */
.CH-hero-left{position:relative;z-index:2}
.CH-h1{margin:0;font-weight:700;font-size:clamp(48px,5.6vw,84px);line-height:1.04;letter-spacing:-2.2px;color:#0F2A47;text-wrap:balance}
.CH-h1 .accent{background:linear-gradient(100deg,#A855F7 0%,#7C3AED 100%);-webkit-background-clip:text;background-clip:text;color:transparent}
.CH-h1 .l2{display:block;margin-top:4px}

.CH-sub{margin:28px 0 0;max-width:540px;font-size:19px;line-height:1.7;color:#475569;text-wrap:pretty}
.CH-sub strong{color:#0F2A47;font-weight:600}

.CH-bullets{margin:32px 0 0;padding:0;list-style:none;display:flex;flex-direction:column;gap:14px;max-width:540px}
.CH-bullets li{position:relative;padding-left:30px;font-size:16px;color:#0F2A47;line-height:1.55;font-weight:500}
.CH-bullets li::before{content:'';position:absolute;left:0;top:9px;width:16px;height:10px;border-left:2.5px solid #A855F7;border-bottom:2.5px solid #A855F7;transform:rotate(-45deg)}
.CH-bullets li b{font-weight:700;color:#0F2A47}

.CH-ctas{margin-top:40px;display:flex;flex-wrap:wrap;gap:12px;align-items:center}
.CH-btn-primary{display:inline-flex;align-items:center;gap:10px;padding:16px 30px;font-size:15px;font-weight:600;color:#fff;background:linear-gradient(135deg,#A855F7 0%,#7C3AED 100%);border:1.5px solid transparent;border-radius:999px;box-shadow:0 10px 24px rgba(139,92,246,0.30);letter-spacing:.3px;cursor:pointer;transition:all .15s;text-decoration:none}
.CH-btn-primary:hover{background:linear-gradient(135deg,#9333EA 0%,#6D28D9 100%);transform:translateY(-1px);box-shadow:0 14px 32px rgba(139,92,246,0.45)}
.CH-btn-outline{display:inline-flex;align-items:center;gap:10px;padding:16px 30px;font-size:15px;font-weight:600;color:#0F2A47;background:rgba(255,255,255,0.5);border:1.5px solid rgba(15,42,71,0.30);border-radius:999px;letter-spacing:.3px;cursor:pointer;text-decoration:none;transition:all .15s}
.CH-btn-outline:hover{background:#fff;border-color:#0F2A47}

/* Right column, route comparison */
.CH-route{position:relative;z-index:2}
.CH-route-card{background:#fff;border:1px solid rgba(139,92,246,0.18);border-radius:18px;padding:22px 30px;box-shadow:0 24px 60px rgba(15,42,71,0.10)}
.CH-route-title{font-family:ui-monospace,monospace;font-size:13px;font-weight:700;letter-spacing:1.6px;color:#64748b;text-transform:uppercase;margin:0 0 22px}

.CH-lane{display:grid;grid-template-columns:78px 1fr 86px;gap:18px;align-items:center;padding:18px 0}
.CH-lane + .CH-lane{border-top:1px dashed rgba(15,42,71,0.12)}
.CH-lane-lbl{font-size:13.5px;font-weight:600;letter-spacing:-.1px;line-height:1.35;color:#0F2A47}
.CH-lane.slow .CH-lane-lbl{color:#64748b}
.CH-lane-lbl small{display:block;font-family:ui-monospace,monospace;font-size:13px;font-weight:500;letter-spacing:.8px;color:#94a3b8;text-transform:uppercase;margin-top:4px}
.CH-lane-ms{font-family:'Inter',sans-serif;font-size:30px;font-weight:700;text-align:right;font-variant-numeric:tabular-nums;letter-spacing:-.8px;line-height:1}
.CH-lane-ms small{display:block;font-family:ui-monospace,monospace;font-size:13px;font-weight:600;letter-spacing:1.2px;color:#94a3b8;text-transform:uppercase;margin-top:6px}
.CH-lane.fast .CH-lane-ms{color:#A855F7}
.CH-lane.slow .CH-lane-ms{color:#94a3b8}

.CH-track{position:relative;height:54px;display:flex;align-items:center}
.CH-track-svg{width:100%;height:100%;display:block;overflow:visible}

/* nodes (origin / edge / user) */
.CH-stops{margin-top:8px;display:grid;grid-template-columns:78px 1fr 86px;gap:18px;align-items:center}
.CH-stops-inner{display:grid;grid-template-columns:repeat(3,1fr);font-family:ui-monospace,monospace;font-size:13px;font-weight:600;letter-spacing:1.2px;color:#94a3b8;text-transform:uppercase}
.CH-stops-inner span{text-align:center}
.CH-stops-inner span:first-child{text-align:left}
.CH-stops-inner span:last-child{text-align:right}

.CH-route-foot{margin-top:24px;padding-top:18px;border-top:1px solid rgba(15,42,71,0.10);display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
.CH-rf-it b{display:block;font-family:'Inter',sans-serif;font-size:24px;font-weight:700;letter-spacing:-.6px;color:#0F2A47;line-height:1;font-variant-numeric:tabular-nums}
.CH-rf-it b.acc{color:#A855F7}
.CH-rf-it span{display:block;margin-top:6px;font-size:13px;color:#64748b;letter-spacing:.2px;line-height:1.4}

@media (max-width: 1100px){
  .CH-hero{padding:88px 0 72px}
  .CH-hero-inner{grid-template-columns:1fr;gap:40px}
  .CH-route-card{max-width:600px}
}
@media (max-width: 700px){
  .CH-hero{padding:64px 0 56px}
  .CH-h1{font-size:clamp(40px,9vw,56px);letter-spacing:-1.2px}
  .CH-sub{font-size:16px}
  .CH-bullets li{font-size:15px}
  .CH-route-card{padding:14px 20px}
  .CH-lane{grid-template-columns:64px 1fr 70px;gap:12px}
  .CH-lane-lbl{font-size:13px}
  .CH-lane-ms{font-size:22px}
  .CH-btn-primary,.CH-btn-outline{padding:14px 22px;font-size:14px}
}
`;

// Route lane, three lanes side-by-side rendered as an SVG with stops
function Lane({ kind, label, sublabel, ms, msLabel }) {
  // slow = squiggly congested path; fast = straight clean line
  return (
    <>
      <div className={`CH-lane ${kind}`}>
        <div className="CH-lane-lbl">
          {label}
          {sublabel && <small>{sublabel}</small>}
        </div>
        <div className="CH-track">
          <svg className="CH-track-svg" viewBox="0 0 400 54" preserveAspectRatio="none" aria-hidden="true">
            {/* origin dot */}
            <circle cx="6" cy="27" r="5" fill={kind === 'fast' ? '#A855F7' : '#cbd5e1'} />
            {/* midpoint edge node */}
            <circle cx="200" cy="27" r="4" fill={kind === 'fast' ? '#A855F7' : '#cbd5e1'} opacity={kind === 'fast' ? 1 : 0.7} />
            {/* user dot */}
            <circle cx="394" cy="27" r="5" fill={kind === 'fast' ? '#A855F7' : '#cbd5e1'} />
            {kind === 'slow' ?
            <path d="M 6 27 Q 40 8 80 27 T 160 27 T 240 27 T 320 27 T 394 27"
            stroke="#94a3b8" strokeWidth="2" fill="none" strokeDasharray="4 4" opacity="0.85" /> :

            <path d="M 6 27 L 394 27"
            stroke="#A855F7" strokeWidth="2.5" fill="none" />
            }
            {kind === 'fast' &&
            <>
                {/* moving packet */}
                <circle r="3" fill="#fff" stroke="#A855F7" strokeWidth="2">
                  <animateMotion dur="2.4s" repeatCount="indefinite"
                path="M 6 27 L 394 27" />
                </circle>
              </>
            }
          </svg>
        </div>
        <div className="CH-lane-ms">
          {ms}<small>{msLabel}</small>
        </div>
      </div>
    </>);

}

function ChinaHero() {
  return (
    <>
      <style>{CH_HERO_CSS}</style>
      <section className="CH-hero" data-screen-label="01 Hero">
        <div className="container CH-hero-inner">
          <div className="CH-hero-left">
            <h1 className="CH-h1">
              <span className="accent">中國 CDN</span>
            </h1>
            <p className="CH-lede" style={{ margin: '14px 0 0', fontWeight: 700, fontSize: 'clamp(20px, 2.1vw, 28px)', lineHeight: 1.3, color: '#0F2A47', letterSpacing: '-0.5px' }}>CN2 GIA 專線網站加速服務</p>
            <p className="CH-sub">
              以中國電信頂級專線直連內地用戶，平均延時 <strong>&lt; 50&nbsp;ms</strong>，
              <strong>毋須 ICP 備案</strong>。讓你的網站、API 與影音內容在內地以本地速度載入，
              把每一毫秒的延遲轉化為更高的轉換率與更穩定的業務增長。
            </p>
            <div className="CH-ctas">
              <a className="CH-btn-primary" href="https://passport.8338.hk/zh-hant/signup" data-cta="start-trial">免費試用</a>
              <a className="CH-btn-outline" href="#pricing" data-cta="view-pricing">查看定價</a>
            </div>
          </div>

          <div className="CH-route">
            <div className="CH-route-card">
              <Lane kind="slow"
              label="一般跨境"
              sublabel=""
              ms="280" msLabel="ms 起" />
              <Lane kind="fast"
              label="UD CN2 GIA"
              sublabel=""
              ms={<>&lt;50</>} msLabel="ms 平均" />
            </div>
          </div>
        </div>
      </section>
    </>);

}

window.ChinaHero = ChinaHero;