:root {
  color-scheme: dark;
  --bg: #071120;
  --bg-2: #0c1a30;
  --panel: rgba(11, 24, 43, 0.82);
  --panel-strong: rgba(15, 32, 56, 0.96);
  --line: rgba(138, 174, 255, 0.18);
  --text: #eef4ff;
  --muted: #8ea4c4;
  --soft: #d6e3f7;
  --brand: #0f4d9b;
  --brand-2: #15a9e8;
  --ok: #17c997;
  --warning: #b6f0d4;
  --danger: #ff7f5f;
  --shadow: 0 24px 84px rgba(2, 8, 18, 0.42);
  --radius: 28px;
  --radius-sm: 16px;
  --font: "Sora", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  min-height: 100vh;
  margin: 0;
  overflow-x: hidden;
  color: var(--text);
  background:
    radial-gradient(circle at 18% 0%, rgba(21, 169, 232, 0.2), transparent 34rem),
    radial-gradient(circle at 84% 12%, rgba(15, 77, 155, 0.24), transparent 30rem),
    linear-gradient(135deg, #06111f 0%, #08162a 44%, #07111d 100%);
  font-family: var(--font);
}
body::before {
  position: fixed;
  inset: 0;
  z-index: -2;
  pointer-events: none;
  content: "";
  background-image:
    linear-gradient(rgba(255,255,255,0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.035) 1px, transparent 1px);
  background-size: 72px 72px;
  mask-image: linear-gradient(to bottom, black, transparent 86%);
}
a { color: inherit; text-decoration: none; }
button, input, select { font: inherit; }
button { cursor: pointer; }
.container { width: min(1180px, calc(100vw - 40px)); margin: 0 auto; }

.demo-ribbon {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  min-height: 38px;
  padding: 8px 20px;
  border-bottom: 1px solid rgba(78, 219, 176, 0.28);
  color: #c7f7e7;
  background: rgba(3, 18, 16, 0.95);
  font-size: 14px;
}
.demo-ribbon strong { color: #7fffd2; }
.demo-ribbon a { color: #081420; background: #8ff7cc; border-radius: 999px; padding: 5px 12px; font-weight: 900; }

.topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  border-bottom: 1px solid var(--line);
  background: rgba(5, 15, 19, 0.88);
  backdrop-filter: blur(18px);
}
.topbar-inner {
  display: flex;
  align-items: center;
  gap: 24px;
  min-height: 86px;
}
.brand { display: inline-flex; align-items: center; gap: 12px; min-width: 270px; }
.brand-logo {
  display: grid;
  width: 58px;
  height: 58px;
  place-items: center;
  border: 1px solid rgba(21, 169, 232, 0.55);
  border-radius: 18px;
  background: linear-gradient(135deg, rgba(15,77,155,.68), rgba(21,169,232,.58));
  box-shadow: inset 0 0 0 6px rgba(255,255,255,.06);
}
.brand-logo img {
  width: 40px;
  height: 40px;
  border-radius: 12px;
  object-fit: cover;
  filter: drop-shadow(0 6px 14px rgba(0, 0, 0, 0.24));
}
.brand-text span { display: block; }
.brand-name { color: var(--text); font-size: 22px; font-weight: 950; letter-spacing: -0.04em; }
.brand-sub { color: var(--muted); font-size: 13px; font-weight: 800; }
.nav { display: flex; align-items: center; justify-content: center; gap: 8px; flex: 1; }
.nav a {
  padding: 12px 16px;
  border-radius: 999px;
  color: #d8e6f6;
  font-size: 15px;
  font-weight: 900;
  white-space: nowrap;
}
.nav a.active, .nav a:hover { background: rgba(255,255,255,.1); }
.top-actions { display: flex; align-items: center; gap: 10px; }
.btn, .theme-toggle, .locale-select {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 42px;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 0 18px;
  color: var(--text);
  background: rgba(255,255,255,.055);
  font-weight: 900;
}
.btn.primary { border: 0; background: linear-gradient(135deg, var(--brand), var(--brand-2)); box-shadow: 0 14px 32px rgba(21,169,232,.24); }
.btn.ghost { background: transparent; }
.full { width: 100%; }

.page-hero { padding: 92px 0 38px; }
.page-hero-grid { display: grid; grid-template-columns: minmax(0, 1fr) 420px; gap: 54px; align-items: start; }
.eyebrow { display: inline-flex; margin-bottom: 12px; color: #7ad8ff; font-size: 13px; font-weight: 1000; letter-spacing: .16em; text-transform: uppercase; }
h1, h2, h3, p { margin-top: 0; }
h1 { max-width: 780px; margin-bottom: 20px; font-size: clamp(52px, 7vw, 86px); line-height: .98; letter-spacing: -0.09em; }
h2 { margin-bottom: 14px; font-size: clamp(30px, 4vw, 54px); line-height: 1.04; letter-spacing: -0.07em; }
h3 { margin-bottom: 10px; font-size: 22px; }
.section-desc { max-width: 740px; color: var(--muted); font-size: 18px; line-height: 1.78; }
.offer-pill, .discount-tag {
  display: inline-flex;
  width: fit-content;
  align-items: center;
  border: 1px solid rgba(23, 201, 151, .42);
  border-radius: 999px;
  color: #d9fff2;
  background: rgba(23, 201, 151, .16);
  font-weight: 950;
}
.offer-pill { margin-top: 18px; padding: 12px 18px; font-size: 18px; }
.discount-tag { padding: 7px 12px; font-size: 13px; }
.sell-card {
  padding: 26px;
  border: 1px solid rgba(21,169,232,.26);
  border-radius: var(--radius);
  background: linear-gradient(180deg, rgba(15,32,56,.9), rgba(11,24,43,.76));
  box-shadow: var(--shadow);
}
.sell-card span { color: #7ad8ff; font-weight: 900; }
.sell-card strong { display: block; margin: 14px 0; font-size: 28px; line-height: 1.16; }
.sell-card p { color: var(--muted); line-height: 1.7; margin: 0; }

.section { padding: 76px 0; }
.pricing-section { padding-top: 24px; }
.pricing-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 24px; align-items: stretch; }
.plan-card {
  position: relative;
  overflow: hidden;
  min-height: 760px;
  padding: 34px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(180deg, rgba(25,45,77,.92), rgba(15,32,56,.74));
  box-shadow: var(--shadow);
}
.plan-card.recommended { border-color: rgba(23, 201, 151, .55); background: linear-gradient(180deg, rgba(18,88,86,.88), rgba(13,48,66,.82)); }
.plan-card.flagship { background: linear-gradient(180deg, rgba(33,45,88,.92), rgba(15,32,56,.82)); }
.plan-tag {
  display: inline-flex;
  margin-bottom: 22px;
  padding: 9px 14px;
  border-radius: 999px;
  color: #e7f7ff;
  background: linear-gradient(135deg, var(--brand), var(--brand-2));
  font-weight: 950;
}
.plan-card h2 { margin-top: 24px; font-size: 28px; }
.price { margin: 16px 0 12px; font-size: 62px; font-weight: 1000; letter-spacing: -0.08em; }
.price span { font-size: .84em; }
.price small { color: var(--muted); font-size: 20px; letter-spacing: 0; }
.mini-badge { display: inline-flex; margin-bottom: 20px; padding: 8px 13px; border-radius: 999px; color: #c9f6ff; background: rgba(21,169,232,.18); font-weight: 900; }
.plan-card p, .plan-card li { color: #c9d7ea; font-size: 17px; line-height: 1.7; }
.plan-card ul { display: grid; gap: 12px; min-height: 250px; margin: 26px 0; padding: 0; list-style: none; }
.plan-card li::before { content: "✓"; margin-right: 10px; color: #1e83d9; font-weight: 1000; }
.period-select {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 64px;
  margin-top: auto;
  border: 1px solid rgba(21,169,232,.6);
  border-radius: 18px;
  padding: 0 20px;
  background: linear-gradient(135deg, rgba(15,77,155,.95), rgba(21,169,232,.82));
  font-size: 18px;
  font-weight: 950;
}
.buy-btn {
  min-height: 64px;
  margin-top: 22px;
  border: 0;
  border-radius: 22px;
  padding: 0 32px;
  color: #fff;
  background: linear-gradient(135deg, #0864c9, #00b7d8);
  font-size: 20px;
  font-weight: 1000;
}

.section-head { display: grid; gap: 10px; margin-bottom: 30px; }
.section-head.inline { grid-template-columns: 1fr 1fr; align-items: end; }
.feature-grid, .download-grid, .console-grid { display: grid; gap: 22px; }
.feature-grid { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.feature-grid article, .download-grid article, .console-grid article, .assistant-panel, .contact-card, .compare-card, .evidence-card {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
  box-shadow: var(--shadow);
}
.feature-grid article { min-height: 260px; padding: 28px; }
.feature-grid span { display: grid; width: 54px; height: 54px; place-items: center; margin-bottom: 28px; border-radius: 16px; color: #d9fff2; background: rgba(23,201,151,.18); font-weight: 1000; }
.feature-grid p, .download-grid p, .console-grid p { color: var(--muted); line-height: 1.72; }
.compare-grid { display: grid; grid-template-columns: minmax(0, .9fr) minmax(0, 1.1fr); gap: 22px; }
.compare-card { padding: 30px; }
.compare-card h3 { margin: 12px 0 18px; font-size: 28px; line-height: 1.18; }
.compare-card ul { display: grid; gap: 14px; margin: 0; padding: 0; list-style: none; }
.compare-card li { color: #c9d7ea; font-size: 16px; line-height: 1.72; }
.compare-card li::before { content: "•"; margin-right: 10px; color: #7ad8ff; font-weight: 1000; }
.compare-label {
  display: inline-flex;
  border: 1px solid rgba(122,216,255,.34);
  border-radius: 999px;
  padding: 7px 12px;
  color: #b9eaff;
  background: rgba(21,169,232,.1);
  font-size: 13px;
  font-weight: 1000;
}
.muted-card { background: rgba(12, 25, 44, .72); }
.highlight-card {
  border-color: rgba(23, 201, 151, .46);
  background:
    linear-gradient(145deg, rgba(23,201,151,.14), transparent 48%),
    var(--panel-strong);
}
.evidence-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 22px; align-items: start; }
.evidence-card { overflow: hidden; margin: 0; background: var(--panel-strong); }
.evidence-card.wide { grid-column: 1 / -1; }
.evidence-card img {
  display: block;
  width: 100%;
  height: 430px;
  object-fit: cover;
  object-position: top center;
  background: #081420;
}
.evidence-card.wide img { height: 560px; }
.evidence-card.app-shot img {
  height: 620px;
  object-fit: contain;
  background:
    linear-gradient(180deg, rgba(21,169,232,.12), transparent),
    #071120;
}
.evidence-card figcaption {
  display: grid;
  gap: 8px;
  padding: 20px 22px 24px;
  border-top: 1px solid var(--line);
}
.evidence-card figcaption strong { font-size: 20px; }
.evidence-card figcaption span { color: var(--muted); line-height: 1.62; }
.phone-head { margin-top: 48px; }
.phone-grid {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 18px;
  align-items: start;
}
.phone-card {
  overflow: hidden;
  margin: 0;
  border: 1px solid var(--line);
  border-radius: 24px;
  background:
    linear-gradient(180deg, rgba(21,169,232,.1), transparent 34%),
    var(--panel-strong);
  box-shadow: 0 20px 70px rgba(2, 8, 18, .34);
}
.phone-card img {
  display: block;
  width: 100%;
  height: 520px;
  object-fit: cover;
  object-position: top center;
  background: #071120;
}
.phone-card figcaption {
  display: grid;
  gap: 7px;
  min-height: 148px;
  padding: 16px 16px 18px;
  border-top: 1px solid var(--line);
}
.phone-card figcaption strong { font-size: 17px; }
.phone-card figcaption span {
  color: var(--muted);
  font-size: 14px;
  line-height: 1.55;
}
.download-grid { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.download-grid article { padding: 26px; }
.download-grid span { color: #7ad8ff; font-weight: 1000; }
.download-grid strong { display: block; margin: 10px 0; font-size: 24px; }
.download-grid button, .download-grid .download-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  border: 1px solid rgba(21,169,232,.44);
  border-radius: 999px;
  padding: 0 14px;
  color: var(--text);
  background: rgba(21,169,232,.12);
  font-weight: 900;
}
.ios-actions { display: grid; gap: 8px; }
.support-grid { display: grid; grid-template-columns: minmax(0, 1fr) 470px; gap: 42px; align-items: center; }
.assistant-panel { padding: 24px; }
.assistant-head { display: flex; align-items: center; justify-content: space-between; gap: 14px; margin-bottom: 18px; }
.assistant-head strong { font-size: 22px; }
.assistant-head span { color: #d9fff2; border-radius: 999px; background: rgba(23,201,151,.16); padding: 8px 12px; font-weight: 900; }
.bubble { width: fit-content; max-width: 88%; margin: 12px 0; border-radius: 18px; padding: 16px 18px; line-height: 1.68; }
.bubble.ai { color: #d8e8ff; background: rgba(255,255,255,.08); }
.bubble.user { margin-left: auto; background: rgba(23,201,151,.18); border: 1px solid rgba(23,201,151,.36); }
.assistant-input { display: flex; align-items: center; justify-content: space-between; gap: 12px; min-height: 54px; margin-top: 18px; border: 1px solid rgba(21,169,232,.42); border-radius: 18px; padding: 8px 8px 8px 16px; color: var(--muted); }
.assistant-input button { border: 0; border-radius: 16px; padding: 11px 18px; color: #fff; background: linear-gradient(135deg, var(--brand), var(--brand-2)); font-weight: 1000; }
.console-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.console-grid article { padding: 32px; }
.contact-card { display: grid; grid-template-columns: minmax(0, 1fr) 420px; gap: 34px; padding: 34px; }
.contact-form { display: grid; gap: 13px; }
.contact-form label { display: grid; gap: 8px; color: var(--soft); font-weight: 900; }
.contact-form input, .contact-form select { min-height: 48px; border: 1px solid var(--line); border-radius: 15px; padding: 0 14px; color: var(--text); background: rgba(5, 15, 25, .8); }
.contact-status { margin: 0; color: var(--muted); font-size: 14px; line-height: 1.6; }
.contact-status.ok { color: #a5ffe4; }
.contact-status.error { color: #ff9f86; }
.console-fab {
  position: fixed;
  right: 26px;
  top: 52%;
  z-index: 30;
  display: inline-flex;
  align-items: center;
  gap: 9px;
  border: 1px solid rgba(122,216,255,.45);
  border-radius: 999px;
  padding: 10px 16px;
  background: linear-gradient(135deg, rgba(15,77,155,.95), rgba(21,169,232,.88));
  box-shadow: 0 18px 46px rgba(0,0,0,.34);
  font-weight: 1000;
}
.console-fab span { display: grid; width: 28px; height: 28px; place-items: center; border-radius: 999px; background: rgba(255,255,255,.16); }
.ai-fab {
  position: fixed;
  right: 28px;
  bottom: 34px;
  z-index: 30;
  width: 70px;
  height: 70px;
  border: 1px solid rgba(122,216,255,.45);
  border-radius: 999px;
  color: #fff;
  background: linear-gradient(135deg, #0864c9, #00b7d8);
  box-shadow: 0 20px 58px rgba(0,0,0,.36);
  font-size: 18px;
  font-weight: 1000;
}
.footer { border-top: 1px solid var(--line); padding: 26px 0; color: var(--muted); }
.footer-inner { display: flex; justify-content: space-between; gap: 18px; }

@media (max-width: 1120px) {
  .topbar-inner, .nav, .top-actions { flex-wrap: wrap; }
  .nav { order: 3; flex-basis: 100%; justify-content: flex-start; overflow-x: auto; padding-bottom: 6px; }
  .page-hero-grid, .support-grid, .contact-card { grid-template-columns: 1fr; }
  .pricing-grid, .feature-grid, .download-grid, .compare-grid, .evidence-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .phone-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .compare-grid { grid-template-columns: 1fr; }
}
@media (max-width: 720px) {
  .demo-ribbon { align-items: flex-start; flex-direction: column; }
  .container { width: min(100% - 28px, 1180px); }
  .topbar { position: static; }
  .topbar-inner { align-items: flex-start; flex-direction: column; padding: 14px 0; }
  .brand { min-width: 0; }
  .top-actions { width: 100%; overflow-x: auto; }
  h1 { font-size: 42px; letter-spacing: -0.07em; }
  h2 { font-size: 34px; }
  .page-hero { padding-top: 46px; }
  .section { padding: 50px 0; }
  .pricing-grid, .feature-grid, .download-grid, .console-grid, .section-head.inline, .evidence-grid, .phone-grid { grid-template-columns: 1fr; }
  .plan-card { min-height: auto; padding: 24px; }
  .plan-card ul { min-height: 0; }
  .price { font-size: 48px; }
  .compare-card { padding: 24px; }
  .evidence-card.wide { grid-column: auto; }
  .evidence-card img, .evidence-card.wide img { height: 300px; }
  .evidence-card.app-shot img { height: 520px; }
  .phone-card img { height: auto; }
  .console-fab { display: none; }
  .ai-fab { width: 58px; height: 58px; right: 18px; bottom: 24px; }
  .footer-inner { flex-direction: column; }
}