:root {
  --navy: #100337;
  --navy-2: #1a0c4d;
  --blue: #3A74FB;
  --sky: #1A97EC;
  --teal: #01DAD7;
  --grad: linear-gradient(135deg, #3A74FB 0%, #1A97EC 100%);
  --grad-teal: linear-gradient(135deg, #3A74FB 0%, #1A97EC 55%, #01DAD7 100%);
  --ink: #100337;
  --body: #4a4766;
  --muted: #6f6c8a;
  --line: #e6e8f2;
  --bg: #ffffff;
  --bg-soft: #f5f7fd;
  --radius: 18px;
  --shadow: 0 10px 30px -12px rgba(16, 3, 55, .18);
  --shadow-lg: 0 30px 60px -20px rgba(16, 3, 55, .35);
  --max: 1180px;
}
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: "Plus Jakarta Sans", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  color: var(--body);
  background: var(--bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
img, svg { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
h1, h2, h3, h4 { color: var(--ink); line-height: 1.15; margin: 0 0 .5em; letter-spacing: -.02em; }
p { margin: 0 0 1em; }
.container { width: 100%; max-width: var(--max); margin: 0 auto; padding: 0 20px; }
.section { padding: 100px 0; }
.eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: .8rem; font-weight: 700; letter-spacing: .12em; text-transform: uppercase;
  color: var(--blue); margin-bottom: 14px;
}
.eyebrow::before { content: ""; width: 22px; height: 2px; background: var(--teal); border-radius: 2px; }
.section-head { max-width: 680px; margin-bottom: 56px; }
.section-head.center { margin-left: auto; margin-right: auto; text-align: center; }
.section-head h2 { font-size: clamp(2rem, 4vw, 2.8rem); font-weight: 800; }
.section-head p { font-size: 1.1rem; color: var(--muted); }
.grad-text { background: var(--grad-teal); -webkit-background-clip: text; background-clip: text; color: transparent; }

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 10px;
  padding: 15px 26px; border-radius: 999px; font-weight: 700; font-size: 1rem;
  border: 2px solid transparent; cursor: pointer; transition: transform .2s, box-shadow .2s, background .2s;
  font-family: inherit;
}
.btn svg { width: 18px; height: 18px; }
.btn-primary { background: var(--grad); color: #fff; box-shadow: 0 12px 28px -10px rgba(58, 116, 251, .7); }
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 18px 34px -12px rgba(58, 116, 251, .8); }
.btn-ghost { border-color: rgba(255,255,255,.25); color: #fff; }
.btn-ghost:hover { border-color: var(--teal); color: var(--teal); }

/* ---------- Header ---------- */
.header {
  position: fixed; inset: 0 0 auto 0; z-index: 50;
  transition: background .3s, box-shadow .3s, padding .3s;
  padding: 18px 0;
}
.header.scrolled { background: rgba(255,255,255,.92); backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px); box-shadow: 0 1px 0 var(--line); padding: 10px 0; }
.nav { display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.logo { display: block; width: 168px; }
.logo img { width: 100%; height: auto; }
.logo .logo-dark { display: none; }
.header.scrolled .logo .logo-light { display: none; }
.header.scrolled .logo .logo-dark { display: block; }
.nav-links { display: flex; align-items: center; gap: 32px; list-style: none; margin: 0; padding: 0; }
.nav-links a { font-weight: 600; font-size: .95rem; color: rgba(255,255,255,.85); transition: color .2s; }
.nav-links a:hover { color: var(--teal); }
.header.scrolled .nav-links a { color: var(--ink); }
.header.scrolled .nav-links a:hover { color: var(--blue); }
.nav .btn { padding: 11px 20px; font-size: .92rem; }
.menu-toggle { display: none; background: none; border: 0; padding: 8px; cursor: pointer; color: #fff; }
.header.scrolled .menu-toggle { color: var(--ink); }
.menu-toggle svg { width: 28px; height: 28px; }

/* ---------- Hero ---------- */
.hero {
  position: relative; overflow: hidden;
  background: var(--navy);
  color: #cfcbe6;
  padding: 170px 0 110px;
}
.hero::before, .hero::after {
  content: ""; position: absolute; border-radius: 50%; filter: blur(90px); pointer-events: none;
}
.hero::before { width: 620px; height: 620px; background: rgba(58, 116, 251, .45); top: -180px; right: -140px; }
.hero::after { width: 420px; height: 420px; background: rgba(1, 218, 215, .22); bottom: -200px; left: -120px; }
.hero-grid-bg {
  position: absolute; inset: 0; pointer-events: none; opacity: .5;
  background-image: linear-gradient(rgba(255,255,255,.05) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,.05) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(ellipse at 70% 30%, #000 20%, transparent 70%);
  -webkit-mask-image: radial-gradient(ellipse at 70% 30%, #000 20%, transparent 70%);
}
.hero .container { position: relative; z-index: 1; display: grid; grid-template-columns: 1.1fr .9fr; gap: 60px; align-items: center; }
.hero .eyebrow { color: var(--teal); }
.hero h1 { color: #fff; font-size: clamp(2.6rem, 6vw, 4.4rem); font-weight: 800; margin-bottom: 22px; }
.hero-lead { font-size: 1.18rem; max-width: 560px; margin-bottom: 34px; color: #cfcbe6; }
.hero-cta { display: flex; flex-wrap: wrap; gap: 14px; margin-bottom: 44px; }
.hero-points { display: flex; flex-wrap: wrap; gap: 12px 26px; list-style: none; padding: 0; margin: 0; font-size: .95rem; font-weight: 600; color: #fff; }
.hero-points li { display: flex; align-items: center; gap: 8px; }
.hero-points svg { width: 18px; height: 18px; color: var(--teal); flex: none; }

.hero-visual { position: relative; }
.serp-card {
  background: #fff; border-radius: 22px; padding: 22px; box-shadow: var(--shadow-lg);
  color: var(--body); position: relative;
}
.serp-search {
  display: flex; align-items: center; gap: 10px; border: 1px solid var(--line); border-radius: 999px;
  padding: 10px 16px; font-size: .9rem; color: var(--ink); font-weight: 600; margin-bottom: 18px;
}
.serp-search svg { width: 16px; height: 16px; color: var(--muted); }
.serp-result { padding: 12px 14px; border-radius: 12px; margin-bottom: 8px; }
.serp-result.top { background: linear-gradient(135deg, rgba(58,116,251,.08), rgba(1,218,215,.10)); border: 1px solid rgba(58,116,251,.25); }
.serp-url { font-size: .75rem; color: var(--muted); display: flex; align-items: center; gap: 8px; }
.serp-badge { background: var(--grad); color: #fff; font-weight: 800; font-size: .7rem; padding: 2px 8px; border-radius: 999px; }
.serp-title { font-weight: 700; color: var(--blue); font-size: .98rem; margin: 2px 0; }
.serp-line { height: 8px; background: var(--line); border-radius: 4px; margin-top: 7px; }
.serp-line.short { width: 60%; }
.serp-result.dim .serp-title { color: #9aa0bd; }
.growth-card {
  position: absolute; right: -24px; bottom: -40px; width: 230px;
  background: var(--navy-2); border: 1px solid rgba(255,255,255,.1); border-radius: 18px; padding: 16px 18px;
  box-shadow: var(--shadow-lg); color: #fff;
}
.growth-card small { color: #a9a4cc; font-size: .75rem; font-weight: 600; }
.growth-card strong { display: block; font-size: 1.05rem; margin-bottom: 8px; }
.growth-card svg { width: 100%; height: 70px; }

/* ---------- Value strip ---------- */
.strip { background: var(--bg-soft); border-bottom: 1px solid var(--line); padding: 34px 0; }
.strip ul { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.strip li { display: flex; align-items: center; gap: 14px; font-weight: 700; color: var(--ink); font-size: .98rem; }
.strip .ico { width: 42px; height: 42px; border-radius: 12px; display: grid; place-items: center; background: #fff; box-shadow: var(--shadow); color: var(--blue); flex: none; }
.strip .ico svg { width: 22px; height: 22px; }

/* ---------- Services ---------- */
.services-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 26px; }
.service {
  position: relative; background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  padding: 34px 30px; transition: transform .25s, box-shadow .25s, border-color .25s; overflow: hidden;
}
.service::after { content: ""; position: absolute; inset: 0 0 auto 0; height: 4px; background: var(--grad-teal); transform: scaleX(0); transform-origin: left; transition: transform .3s; }
.service:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); border-color: transparent; }
.service:hover::after { transform: scaleX(1); }
.service-icon { width: 60px; height: 60px; border-radius: 16px; background: var(--grad); display: grid; place-items: center; color: #fff; margin-bottom: 24px; box-shadow: 0 12px 24px -10px rgba(58,116,251,.7); }
.service-icon svg { width: 30px; height: 30px; }
.service h3 { font-size: 1.4rem; font-weight: 800; }
.service > p { color: var(--muted); }
.service ul { list-style: none; padding: 0; margin: 20px 0 0; display: grid; gap: 10px; }
.service li { display: flex; gap: 10px; font-size: .95rem; color: var(--ink); font-weight: 500; }
.service li svg { width: 18px; height: 18px; color: var(--teal); flex: none; margin-top: 3px; }

/* ---------- Process ---------- */
.process { background: var(--bg-soft); }
.steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; counter-reset: step; position: relative; }
.step { background: #fff; border-radius: var(--radius); padding: 30px 26px; box-shadow: var(--shadow); position: relative; }
.step-num { font-size: 2.6rem; font-weight: 800; line-height: 1; margin-bottom: 18px; }
.step h3 { font-size: 1.2rem; font-weight: 800; }
.step p { color: var(--muted); font-size: .96rem; margin: 0; }

/* ---------- Why ---------- */
.why .container { display: grid; grid-template-columns: .95fr 1.05fr; gap: 70px; align-items: center; }
.why-panel {
  position: relative; background: var(--navy); border-radius: 26px; padding: 46px 40px; color: #cfcbe6; overflow: hidden;
}
.why-panel::before { content: ""; position: absolute; width: 340px; height: 340px; border-radius: 50%; background: rgba(58,116,251,.45); filter: blur(80px); top: -120px; right: -120px; }
.why-panel > * { position: relative; }
.why-panel img { width: 92px; margin-bottom: 26px; }
.why-panel blockquote { margin: 0 0 22px; font-size: 1.45rem; line-height: 1.4; color: #fff; font-weight: 700; letter-spacing: -.01em; }
.why-panel p { margin: 0; }
.why-list { display: grid; gap: 26px; }
.why-item { display: flex; gap: 18px; }
.why-item .ico { width: 50px; height: 50px; border-radius: 14px; flex: none; display: grid; place-items: center; background: rgba(58,116,251,.1); color: var(--blue); }
.why-item .ico svg { width: 24px; height: 24px; }
.why-item h3 { font-size: 1.15rem; font-weight: 800; margin-bottom: 4px; }
.why-item p { margin: 0; color: var(--muted); }

/* ---------- Industries ---------- */
.industries { padding-top: 0; }
.chips { display: flex; flex-wrap: wrap; justify-content: center; gap: 12px; }
.chip { padding: 12px 22px; border-radius: 999px; background: #fff; border: 1px solid var(--line); font-weight: 600; color: var(--ink); font-size: .95rem; transition: border-color .2s, color .2s; }
.chip:hover { border-color: var(--blue); color: var(--blue); }

/* ---------- FAQ ---------- */
.faq { background: var(--bg-soft); }
.faq-list { max-width: 820px; margin: 0 auto; display: grid; gap: 14px; }
.faq details { background: #fff; border-radius: 14px; border: 1px solid var(--line); padding: 0 24px; transition: box-shadow .2s; }
.faq details[open] { box-shadow: var(--shadow); }
.faq summary { list-style: none; cursor: pointer; padding: 22px 0; font-weight: 700; color: var(--ink); font-size: 1.05rem; display: flex; justify-content: space-between; gap: 20px; align-items: center; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; font-size: 1.5rem; font-weight: 500; color: var(--blue); line-height: 1; transition: transform .2s; flex: none; }
.faq details[open] summary::after { transform: rotate(45deg); }
.faq details p { padding-bottom: 22px; margin: 0; color: var(--muted); }

/* ---------- Contact ---------- */
.contact { background: var(--navy); color: #cfcbe6; position: relative; overflow: hidden; }
.contact::before { content: ""; position: absolute; width: 560px; height: 560px; border-radius: 50%; background: rgba(26,151,236,.35); filter: blur(100px); bottom: -260px; right: -160px; }
.contact .container { position: relative; display: grid; grid-template-columns: .9fr 1.1fr; gap: 60px; align-items: start; }
.contact h2 { color: #fff; font-size: clamp(2rem, 4vw, 2.8rem); font-weight: 800; }
.contact .eyebrow { color: var(--teal); }
.contact-info { list-style: none; padding: 0; margin: 34px 0 0; display: grid; gap: 18px; }
.contact-info li { display: flex; gap: 14px; align-items: center; color: #fff; font-weight: 600; }
.contact-info .ico { width: 44px; height: 44px; border-radius: 12px; display: grid; place-items: center; background: rgba(255,255,255,.08); color: var(--teal); flex: none; }
.contact-info .ico svg { width: 20px; height: 20px; }
.contact-info small { display: block; color: #a9a4cc; font-weight: 500; font-size: .82rem; }
.contact-info a:hover { color: var(--teal); }
.form { background: #fff; border-radius: 24px; padding: 38px; box-shadow: var(--shadow-lg); color: var(--body); }
.form h3 { font-size: 1.4rem; font-weight: 800; margin-bottom: 6px; }
.form > p { color: var(--muted); margin-bottom: 24px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.field { margin-bottom: 16px; }
.field label { display: block; font-size: .85rem; font-weight: 700; color: var(--ink); margin-bottom: 6px; }
.field input, .field select, .field textarea {
  width: 100%; font: inherit; font-size: .98rem; color: var(--ink);
  padding: 13px 15px; border-radius: 12px; border: 1.5px solid var(--line); background: var(--bg-soft);
  transition: border-color .2s, background .2s, box-shadow .2s;
}
.field textarea { resize: vertical; min-height: 120px; }
.field input:focus, .field select:focus, .field textarea:focus { outline: none; border-color: var(--blue); background: #fff; box-shadow: 0 0 0 4px rgba(58,116,251,.12); }
.form .btn { width: 100%; margin-top: 6px; }
.form-note { font-size: .82rem; color: var(--muted); text-align: center; margin: 14px 0 0; }

/* ---------- Footer ---------- */
.footer { background: #0b0226; color: #a9a4cc; padding: 60px 0 30px; font-size: .95rem; }
.footer-top { display: flex; justify-content: space-between; align-items: flex-start; gap: 40px; flex-wrap: wrap; padding-bottom: 36px; border-bottom: 1px solid rgba(255,255,255,.08); }
.footer .logo { width: 150px; margin-bottom: 14px; }
.footer-top p { max-width: 340px; margin: 0; }
.footer-cols { display: flex; gap: 70px; flex-wrap: wrap; }
.footer-cols h4 { color: #fff; font-size: .9rem; text-transform: uppercase; letter-spacing: .1em; margin-bottom: 14px; }
.footer-cols ul { list-style: none; padding: 0; margin: 0; display: grid; gap: 8px; }
.footer-cols a:hover { color: var(--teal); }
.footer-bottom { display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; padding-top: 26px; font-size: .85rem; }

/* ---------- Reveal ---------- */
.reveal { opacity: 0; transform: translateY(24px); transition: opacity .7s ease, transform .7s ease; }
.reveal.in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
}

/* ---------- Responsive ---------- */
@media (max-width: 1024px) {
  .hero .container { grid-template-columns: 1fr; }
  .hero-visual { max-width: 520px; margin-bottom: 40px; }
  .services-grid { grid-template-columns: 1fr 1fr; }
  .steps { grid-template-columns: 1fr 1fr; }
  .strip ul { grid-template-columns: 1fr 1fr; }
  .why .container, .contact .container { grid-template-columns: 1fr; gap: 50px; }
}
@media (max-width: 860px) {
  .menu-toggle { display: block; }
  .nav-links {
    position: fixed; inset: 0; top: 0; background: var(--navy);
    flex-direction: column; justify-content: center; gap: 28px;
    transform: translateX(100%); transition: transform .3s ease; z-index: -1;
  }
  .nav-links.open { transform: none; }
  .nav-links a, .header.scrolled .nav-links a { color: #fff; font-size: 1.3rem; }
  .header.menu-open .logo .logo-light { display: block; }
  .header.menu-open .logo .logo-dark { display: none; }
  .header.menu-open .menu-toggle { color: #fff; }
  .header.menu-open { background: transparent; box-shadow: none; }
  .nav > .btn { display: none; }
}
@media (max-width: 640px) {
  .container { padding: 0 16px; }
  .section { padding: 72px 0; }
  .hero { padding: 130px 0 80px; }
  .services-grid, .steps, .strip ul, .form-row { grid-template-columns: 1fr; }
  .growth-card { right: 8px; bottom: -36px; width: 190px; }
  .form { padding: 26px 20px; }
  .why-panel { padding: 34px 26px; }
  .footer-cols { gap: 40px; }
  .logo { width: 140px; }
}

/* ---------- Pricing ---------- */
.plans { display: grid; grid-template-columns: repeat(3, 1fr); gap: 26px; align-items: stretch; }
.plan {
  position: relative; display: flex; flex-direction: column;
  background: #fff; border: 1px solid var(--line); border-radius: 22px; padding: 36px 30px;
  transition: transform .25s, box-shadow .25s;
}
.plan:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.plan.featured { background: var(--navy); border-color: transparent; color: #cfcbe6; box-shadow: var(--shadow-lg); }
.plan.featured h3, .plan.featured h4, .plan.featured .plan-price, .plan.featured li { color: #fff; }
.plan-badge {
  position: absolute; top: -14px; left: 30px; background: var(--grad-teal); color: #fff;
  font-size: .75rem; font-weight: 800; letter-spacing: .08em; text-transform: uppercase; padding: 6px 14px; border-radius: 999px;
}
.plan h3 { font-size: 1.35rem; font-weight: 800; margin-bottom: 6px; }
.plan-desc { color: var(--muted); font-size: .95rem; min-height: 3.1em; }
.plan.featured .plan-desc { color: #a9a4cc; }
.plan-price { font-size: 2.8rem; font-weight: 800; color: var(--ink); letter-spacing: -.03em; line-height: 1.1; margin-top: 8px; }
.plan-price span { font-size: .95rem; font-weight: 600; color: var(--muted); letter-spacing: 0; margin-left: 4px; }
.plan.featured .plan-price span { color: #a9a4cc; }
.plan-monthly { font-size: .98rem; margin: 6px 0 24px; color: var(--body); }
.plan-monthly strong { color: var(--blue); }
.plan.featured .plan-monthly { color: #cfcbe6; }
.plan.featured .plan-monthly strong { color: var(--teal); }
.plan .btn { width: 100%; margin-bottom: 26px; }
.btn-outline { border-color: var(--line); color: var(--ink); }
.btn-outline:hover { border-color: var(--blue); color: var(--blue); }
.plan h4 { font-size: .78rem; text-transform: uppercase; letter-spacing: .1em; color: var(--muted); margin: 6px 0 12px; }
.plan ul { list-style: none; padding: 0; margin: 0 0 20px; display: grid; gap: 9px; }
.plan li { display: flex; gap: 10px; font-size: .93rem; color: var(--ink); font-weight: 500; }
.plan li svg { width: 18px; height: 18px; color: var(--teal); flex: none; margin-top: 2px; }
.plans-note { text-align: center; color: var(--muted); font-size: .9rem; margin: 34px auto 0; max-width: 680px; }

/* ---------- Language switch ---------- */
.nav-links .lang-switch {
  border: 1.5px solid rgba(255,255,255,.35); border-radius: 999px; padding: 6px 14px; font-size: .88rem;
}
.header.scrolled .nav-links .lang-switch { border-color: var(--line); }
.nav-links .lang-switch:hover { border-color: var(--teal); }

@media (max-width: 1024px) {
  .plans { grid-template-columns: 1fr; max-width: 520px; margin: 0 auto; }
  .plan-desc { min-height: 0; }
}

.since { display: flex; align-items: center; gap: 14px; margin-top: 26px; padding-top: 22px; border-top: 1px solid rgba(255,255,255,.12); }
.since strong { font-size: 2.4rem; font-weight: 800; line-height: 1; background: var(--grad-teal); -webkit-background-clip: text; background-clip: text; color: transparent; }
.since span { font-size: .9rem; color: #a9a4cc; max-width: 160px; line-height: 1.35; }

/* ---------- Chinese ---------- */
html[lang^="zh"] body { font-family: "Plus Jakarta Sans", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif; }
html[lang^="zh"] h1, html[lang^="zh"] h2, html[lang^="zh"] h3 { letter-spacing: 0; line-height: 1.3; }
html[lang^="zh"] .eyebrow { letter-spacing: .15em; }