:root {
  --page-bg: #3922b8;
  --deep: #25159b;
  --deep-2: #311daf;
  --blue: #0877fa;
  --blue-2: #0f8dff;
  --cyan: #15e5ff;
  --orange: #ff4a22;
  --orange-2: #ff6b2e;
  --text: #ffffff;
  --muted: rgba(255,255,255,.74);
  --line: rgba(255,255,255,.16);
  --glass: rgba(255,255,255,.08);
  --shadow: 0 26px 70px rgba(0,0,0,.25);
  --radius: 22px;
  --wrap: 1480px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  min-height: 100vh;
  color: var(--text);
  background:
    radial-gradient(circle at 10% 5%, rgba(23, 223, 255, .18), transparent 32vw),
    radial-gradient(circle at 90% 10%, rgba(8, 119, 250, .25), transparent 34vw),
    linear-gradient(180deg, #1d58db 0%, #3420b4 34%, #3922b8 100%);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
  overflow-x: hidden;
}
a { color: inherit; text-decoration: none; }
button, input, textarea { font: inherit; }
img { max-width: 100%; display: block; }
::selection { background: rgba(21,229,255,.28); }

.bg-orbits {
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  overflow: hidden;
}
.bg-orbits::before,
.bg-orbits::after {
  content: "";
  position: absolute;
  width: 760px;
  height: 760px;
  border: 1px solid rgba(255,255,255,.08);
  border-radius: 50%;
  filter: blur(.2px);
  animation: rotate 42s linear infinite;
}
.bg-orbits::before { left: -220px; top: 160px; box-shadow: inset 0 0 90px rgba(21,229,255,.05); }
.bg-orbits::after { right: -260px; top: 780px; animation-direction: reverse; box-shadow: inset 0 0 90px rgba(255,74,34,.04); }
@keyframes rotate { to { transform: rotate(360deg); } }

.site-header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 50;
  height: 76px;
  display: flex;
  justify-content: center;
  background: rgba(8, 82, 218, .72);
  border-bottom: 1px solid rgba(255,255,255,.12);
  backdrop-filter: blur(18px);
  transition: background .25s ease, box-shadow .25s ease, height .25s ease;
}
.site-header.is-scrolled {
  height: 68px;
  background: rgba(20, 30, 125, .88);
  box-shadow: 0 18px 42px rgba(0,0,0,.18);
}
.header-inner {
  width: min(var(--wrap), calc(100% - 72px));
  display: grid;
  grid-template-columns: 260px 1fr auto;
  align-items: center;
  gap: 28px;
}
.brand { display: flex; align-items: center; gap: 12px; font-weight: 800; letter-spacing: .04em; }
.brand img { width: 42px; height: 42px; object-fit: contain; filter: drop-shadow(0 6px 14px rgba(0,0,0,.2)); }
.brand strong { font-size: 20px; }
.main-nav { display: flex; justify-content: center; gap: 54px; }
.main-nav a {
  position: relative;
  padding: 27px 0 25px;
  font-size: 16px;
  color: rgba(255,255,255,.86);
  transition: color .2s ease;
}
.site-header.is-scrolled .main-nav a { padding-top: 23px; padding-bottom: 21px; }
.main-nav a:hover,
.main-nav a.active { color: #fff; }
.main-nav a::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: 17px;
  width: 0;
  height: 2px;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--cyan), #fff);
  box-shadow: 0 0 12px rgba(21,229,255,.72);
  transition: width .2s ease, left .2s ease;
}
.main-nav a:hover::after,
.main-nav a.active::after { width: 100%; left: 0; }
.header-actions { display: flex; justify-content: flex-end; gap: 12px; }
.btn,
.header-cta,
.card button,
.modal-panel form button,
.band button {
  border: 0;
  border-radius: 999px;
  color: #fff;
  background: linear-gradient(90deg, var(--orange-2), var(--orange));
  box-shadow: 0 12px 26px rgba(255,74,34,.28);
  padding: 12px 24px;
  cursor: pointer;
  transition: transform .18s ease, box-shadow .18s ease, filter .18s ease;
}
.btn:hover,
.header-cta:hover,
.card button:hover,
.modal-panel form button:hover,
.band button:hover { transform: translateY(-2px); filter: brightness(1.06); box-shadow: 0 18px 36px rgba(255,74,34,.34); }
.btn.ghost { background: rgba(255,255,255,.08); border: 1px solid rgba(255,255,255,.18); box-shadow: none; }
.mobile-toggle { display: none; width: 44px; height: 44px; border: 1px solid rgba(255,255,255,.18); border-radius: 12px; background: rgba(255,255,255,.08); color: #fff; }
.mobile-toggle span { display: block; width: 20px; height: 2px; margin: 5px auto; background: #fff; border-radius: 9px; transition: .2s ease; }
.mobile-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.mobile-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.mobile-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

.page-hero {
  position: relative;
  min-height: 720px;
  padding: 168px 0 98px;
  overflow: hidden;
  display: grid;
  place-items: center;
}
.page-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 50% 30%, rgba(21,229,255,.2), transparent 25%),
    linear-gradient(135deg, rgba(255,255,255,.12), transparent 32%),
    linear-gradient(180deg, rgba(7,93,231,.36), transparent 55%);
}
.page-hero::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: -190px;
  width: 1600px;
  height: 360px;
  transform: translateX(-50%);
  border-radius: 50%;
  background: radial-gradient(ellipse at center, rgba(21,229,255,.17), transparent 65%);
  border-top: 1px solid rgba(255,255,255,.13);
}
.hero-grid {
  position: relative;
  width: min(var(--wrap), calc(100% - 72px));
  display: grid;
  grid-template-columns: 1.02fr .98fr;
  gap: 64px;
  align-items: center;
}
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 24px;
  padding: 9px 16px;
  border: 1px solid rgba(21,229,255,.32);
  border-radius: 999px;
  color: rgba(255,255,255,.86);
  background: rgba(21,229,255,.08);
  box-shadow: inset 0 0 24px rgba(21,229,255,.08);
}
.eyebrow::before { content:""; width: 8px; height: 8px; border-radius: 50%; background: var(--cyan); box-shadow: 0 0 14px var(--cyan); }
h1 { margin: 0; font-size: clamp(46px, 5.6vw, 88px); line-height: 1.14; letter-spacing: .02em; }
.hero-copy p { max-width: 700px; margin: 30px 0 38px; color: rgba(255,255,255,.82); font-size: 18px; line-height: 1.9; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 16px; }
.hero-panel {
  position: relative;
  min-height: 430px;
  padding: 20px;
  border-radius: 30px;
  border: 1px solid rgba(255,255,255,.16);
  background:
    linear-gradient(140deg, rgba(255,255,255,.16), rgba(255,255,255,.05)),
    rgba(12, 20, 88, .28);
  box-shadow: var(--shadow), inset 0 1px 0 rgba(255,255,255,.16);
  overflow: hidden;
}
.hero-panel::before {
  content: "";
  position: absolute;
  inset: -1px;
  background:
    linear-gradient(90deg, transparent, rgba(21,229,255,.3), transparent),
    radial-gradient(circle at 78% 20%, rgba(255,255,255,.15), transparent 26%);
  transform: translateX(-35%);
  animation: scan 4.8s ease-in-out infinite;
  pointer-events: none;
}
@keyframes scan { 50% { transform: translateX(35%); } }
.hero-panel img { position: relative; width: 100%; height: 390px; object-fit: cover; border-radius: 22px; filter: saturate(1.05); }
.panel-overlay {
  position: absolute;
  left: 36px;
  right: 36px;
  bottom: 36px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
}
.panel-overlay span {
  padding: 14px 12px;
  border-radius: 14px;
  border: 1px solid rgba(255,255,255,.18);
  background: rgba(4, 18, 62, .56);
  backdrop-filter: blur(12px);
  font-size: 13px;
  text-align: center;
}
.section { position: relative; padding: 110px 0; }
.section .wrap { width: min(var(--wrap), calc(100% - 72px)); margin: 0 auto; }
.section-head { margin-bottom: 54px; text-align: center; }
.section-head h2 { margin: 0; font-size: clamp(34px, 3.6vw, 56px); line-height: 1.18; }
.section-head p { max-width: 820px; margin: 20px auto 0; color: var(--muted); line-height: 1.8; font-size: 17px; }
.grid-2 { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 28px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: 28px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, minmax(0,1fr)); gap: 24px; }
.card {
  position: relative;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background:
    linear-gradient(150deg, rgba(255,255,255,.12), rgba(255,255,255,.045)),
    rgba(6, 18, 76, .26);
  box-shadow: 0 20px 52px rgba(0,0,0,.16);
  overflow: hidden;
  transition: transform .24s ease, border-color .24s ease, background .24s ease;
}
.card::before {
  content: "";
  position: absolute;
  left: -20%;
  top: -20%;
  width: 70%;
  height: 70%;
  background: radial-gradient(circle, rgba(21,229,255,.18), transparent 68%);
  pointer-events: none;
  opacity: 0;
  transition: opacity .24s ease;
}
.card:hover { transform: translateY(-8px); border-color: rgba(21,229,255,.34); background: linear-gradient(150deg, rgba(255,255,255,.15), rgba(255,255,255,.06)), rgba(6, 18, 76, .34); }
.card:hover::before { opacity: 1; }
.card-pad { position: relative; padding: 34px; }
.icon {
  width: 60px;
  height: 60px;
  margin-bottom: 24px;
  display: grid;
  place-items: center;
  border-radius: 18px;
  background: linear-gradient(135deg, rgba(21,229,255,.28), rgba(8,119,250,.12));
  border: 1px solid rgba(21,229,255,.25);
  box-shadow: inset 0 0 28px rgba(21,229,255,.12);
  font-size: 28px;
}
.card h3 { position: relative; margin: 0 0 14px; font-size: 24px; }
.card p { position: relative; margin: 0; color: rgba(255,255,255,.72); line-height: 1.78; }
.card ul { position: relative; margin: 18px 0 0; padding-left: 19px; color: rgba(255,255,255,.76); line-height: 1.9; }
.light-card { background: #fff; color: #17172a; }
.light-card h3 { color: #ff4a22; }
.light-card p, .light-card ul { color: #596070; }
.light-card::before { background: radial-gradient(circle, rgba(8,119,250,.12), transparent 68%); }

.tech-stack { background: linear-gradient(180deg, rgba(49,29,175,.2), rgba(57,34,184,.4)); }
.architecture {
  display: grid;
  grid-template-columns: 1fr 1.5fr 1fr;
  gap: 22px;
  align-items: stretch;
}
.arch-col { display: grid; gap: 18px; }
.arch-core {
  min-height: 560px;
  padding: 36px;
  border-radius: 28px;
  background:
    radial-gradient(circle at 50% 30%, rgba(21,229,255,.2), transparent 35%),
    linear-gradient(180deg, rgba(8,119,250,.42), rgba(34,21,130,.35));
  border: 1px solid rgba(21,229,255,.26);
  box-shadow: var(--shadow), inset 0 0 48px rgba(21,229,255,.08);
  display: grid;
  place-items: center;
  text-align: center;
}
.arch-orb {
  width: 240px;
  height: 240px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background:
    radial-gradient(circle at 40% 30%, rgba(255,255,255,.42), transparent 18%),
    radial-gradient(circle at 50% 50%, rgba(21,229,255,.35), rgba(8,119,250,.12) 50%, transparent 65%);
  border: 1px solid rgba(21,229,255,.4);
  box-shadow: 0 0 64px rgba(21,229,255,.25), inset 0 0 60px rgba(255,255,255,.08);
  animation: pulse 3.2s ease-in-out infinite;
}
@keyframes pulse { 50% { transform: scale(1.04); box-shadow: 0 0 88px rgba(21,229,255,.38), inset 0 0 68px rgba(255,255,255,.1); } }
.arch-orb strong { font-size: 34px; line-height: 1.24; }
.arch-core p { max-width: 480px; margin: 28px auto 0; color: rgba(255,255,255,.78); line-height: 1.8; }
.mini {
  padding: 26px;
  border-radius: 22px;
  background: rgba(255,255,255,.07);
  border: 1px solid rgba(255,255,255,.13);
}
.mini h3 { margin: 0 0 8px; font-size: 21px; }
.mini p { margin: 0; color: var(--muted); line-height: 1.7; }
.timeline { display: grid; grid-template-columns: repeat(5,1fr); gap: 18px; counter-reset: step; }
.timeline .step {
  position: relative;
  padding: 26px 22px;
  border-radius: 18px;
  border: 1px solid rgba(255,255,255,.14);
  background: rgba(255,255,255,.07);
  min-height: 190px;
}
.timeline .step::before {
  counter-increment: step;
  content: "0" counter(step);
  display: inline-grid;
  place-items: center;
  width: 42px;
  height: 42px;
  margin-bottom: 18px;
  border-radius: 50%;
  color: #08114d;
  background: linear-gradient(135deg, #fff, var(--cyan));
  font-weight: 800;
}
.timeline h3 { margin: 0 0 10px; font-size: 20px; }
.timeline p { margin: 0; color: var(--muted); line-height: 1.7; font-size: 15px; }

.product-hero .hero-panel img { object-position: center; }
.product-grid .card { min-height: 460px; display: flex; flex-direction: column; }
.product-grid .media { height: 220px; overflow: hidden; background: rgba(255,255,255,.06); }
.product-grid .media img { width: 100%; height: 100%; object-fit: cover; transition: transform .35s ease; }
.product-grid .card:hover .media img { transform: scale(1.04); }
.product-grid .card-pad { flex: 1; display: flex; flex-direction: column; }
.product-grid .card p { flex: 1; }
.badges { display: flex; flex-wrap: wrap; gap: 8px; margin: 18px 0 24px; }
.badges span { padding: 6px 10px; border-radius: 999px; color: rgba(255,255,255,.86); background: rgba(21,229,255,.1); border: 1px solid rgba(21,229,255,.18); font-size: 13px; }
.light-card .badges span { color: #14509e; background: rgba(8,119,250,.08); border-color: rgba(8,119,250,.12); }
.tabs { border-radius: 26px; border: 1px solid rgba(255,255,255,.15); background: rgba(255,255,255,.06); box-shadow: var(--shadow); overflow: hidden; }
.tab-list { display: flex; padding: 12px; gap: 10px; border-bottom: 1px solid rgba(255,255,255,.12); }
.tab-list button { flex: 1; border: 0; border-radius: 16px; padding: 16px 18px; background: transparent; color: rgba(255,255,255,.72); cursor: pointer; transition: .2s ease; }
.tab-list button.active { color: #fff; background: linear-gradient(90deg, rgba(8,119,250,.55), rgba(21,229,255,.18)); box-shadow: inset 0 0 24px rgba(21,229,255,.08); }
.tab-panel { display: none; padding: 38px; grid-template-columns: 1fr 1fr; gap: 36px; align-items: center; }
.tab-panel.active { display: grid; }
.tab-panel h3 { margin: 0 0 16px; font-size: 34px; }
.tab-panel p { color: var(--muted); line-height: 1.85; }
.tab-panel img { border-radius: 22px; box-shadow: var(--shadow); }
.checks { display: grid; gap: 12px; margin-top: 24px; }
.checks li { list-style: none; position: relative; padding-left: 30px; color: rgba(255,255,255,.78); }
.checks li::before { content: "✓"; position: absolute; left: 0; top: 0; color: var(--cyan); }

.solution-hero .hero-panel { min-height: 470px; }
.scenario-switch { display: grid; grid-template-columns: 320px 1fr; gap: 30px; }
.scenario-menu { display: grid; gap: 12px; align-self: start; position: sticky; top: 98px; }
.scenario-menu button {
  border: 1px solid rgba(255,255,255,.14);
  border-radius: 18px;
  padding: 18px 20px;
  background: rgba(255,255,255,.07);
  color: rgba(255,255,255,.78);
  text-align: left;
  cursor: pointer;
  transition: .18s ease;
}
.scenario-menu button.active,
.scenario-menu button:hover { color: #fff; background: linear-gradient(90deg, rgba(8,119,250,.52), rgba(21,229,255,.12)); border-color: rgba(21,229,255,.28); transform: translateX(4px); }
.scenario-pane { display: none; }
.scenario-pane.active { display: block; animation: fadeUp .25s ease both; }
.scenario-visual { position: relative; min-height: 440px; border-radius: 28px; overflow: hidden; box-shadow: var(--shadow); }
.scenario-visual img { width: 100%; height: 440px; object-fit: cover; filter: saturate(1.08); }
.scenario-visual::after { content:""; position: absolute; inset: 0; background: linear-gradient(90deg, rgba(8, 16, 70, .88), rgba(8, 16, 70, .24)); }
.scenario-content { position: absolute; z-index: 2; left: 42px; top: 42px; width: min(520px, calc(100% - 84px)); }
.scenario-content h3 { margin: 0 0 18px; font-size: 38px; }
.scenario-content p { margin: 0 0 24px; color: rgba(255,255,255,.78); line-height: 1.85; }
.kpi-row { display: grid; grid-template-columns: repeat(3,1fr); gap: 14px; }
.kpi { padding: 18px; border-radius: 16px; border: 1px solid rgba(255,255,255,.16); background: rgba(255,255,255,.08); backdrop-filter: blur(8px); }
.kpi strong { display: block; font-size: 28px; color: var(--cyan); }
.kpi span { font-size: 13px; color: rgba(255,255,255,.66); }
.process-grid { display: grid; grid-template-columns: repeat(4,1fr); gap: 22px; }
.process-grid article { padding: 28px; border-radius: 20px; border: 1px solid rgba(255,255,255,.14); background: rgba(255,255,255,.07); }
.process-grid b { display: inline-flex; width: 46px; height: 46px; border-radius: 50%; align-items: center; justify-content: center; background: linear-gradient(135deg, #fff, var(--cyan)); color: #14145a; margin-bottom: 18px; }
.process-grid h3 { margin: 0 0 10px; }
.process-grid p { margin: 0; color: var(--muted); line-height: 1.72; }

.band {
  width: min(1160px, calc(100% - 72px));
  margin: 70px auto 0;
  padding: 38px 44px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 28px;
  border-radius: 18px;
  background: linear-gradient(110deg, #0877fa, #08adff);
  box-shadow: 0 24px 64px rgba(8,119,250,.24);
  overflow: hidden;
  position: relative;
}
.band::before { content:""; position: absolute; inset: -60% 40% -60% auto; width: 420px; background: linear-gradient(90deg, transparent, rgba(255,255,255,.2), transparent); transform: rotate(18deg); }
.band h2 { position: relative; margin: 0; font-size: 34px; line-height: 1.22; }
.band p { position: relative; margin: 8px 0 0; color: rgba(255,255,255,.75); }
.band button { position: relative; background: #fff; color: #0877fa; box-shadow: 0 12px 26px rgba(0,0,0,.12); white-space: nowrap; }

.site-footer { padding: 120px 0 72px; background: #3922b8; }
.footer-inner { width: min(var(--wrap), calc(100% - 72px)); margin: 0 auto; display: grid; grid-template-columns: 1.3fr 1fr 1fr 1fr; gap: 48px; color: rgba(255,255,255,.72); }
.footer-inner h3 { margin: 0 0 16px; color: #fff; }
.footer-inner p { margin: 0; line-height: 1.8; }
.footer-inner ul { margin: 0; padding: 0; list-style: none; display: grid; gap: 12px; }
.footer-brand { display: flex; gap: 12px; align-items: center; margin-bottom: 18px; color: #fff; font-weight: 800; }
.footer-brand img { width: 42px; height: 42px; }
.copyright { grid-column: 1 / -1; padding-top: 32px; border-top: 1px solid rgba(255,255,255,.12); font-size: 14px; }

.reveal { opacity: 0; transform: translateY(28px); transition: opacity .55s ease, transform .55s ease; }
.reveal.is-visible { opacity: 1; transform: translateY(0); }
@keyframes fadeUp { from { opacity: 0; transform: translateY(12px); } to { opacity: 1; transform: translateY(0); } }

.modal {
  position: fixed;
  inset: 0;
  z-index: 100;
  display: grid;
  place-items: center;
  padding: 24px;
  opacity: 0;
  pointer-events: none;
  transition: opacity .2s ease;
}
.modal[aria-hidden="false"] { opacity: 1; pointer-events: auto; }
.modal-mask { position: absolute; inset: 0; background: rgba(3, 8, 36, .68); backdrop-filter: blur(8px); }
.modal-panel {
  position: relative;
  width: min(560px, 100%);
  padding: 34px;
  border-radius: 26px;
  background: linear-gradient(150deg, rgba(22,99,255,.35), rgba(49,22,168,.86)), rgba(17,20,64,.86);
  border: 1px solid rgba(255,255,255,.18);
  box-shadow: 0 30px 80px rgba(0,0,0,.38), inset 0 1px 0 rgba(255,255,255,.18);
  transform: translateY(18px) scale(.98);
  transition: transform .22s ease;
}
.modal[aria-hidden="false"] .modal-panel { transform: translateY(0) scale(1); }
.modal-close { position: absolute; right: 18px; top: 14px; width: 38px; height: 38px; border: 0; border-radius: 50%; color: #fff; background: rgba(255,255,255,.12); cursor: pointer; font-size: 28px; line-height: 1; }
.modal-logo { width: 56px; height: 56px; display: grid; place-items: center; border-radius: 16px; background: rgba(255,255,255,.12); }
.modal-logo img { width: 42px; height: 42px; object-fit: contain; }
.modal-panel h2 { margin: 18px 0 8px; font-size: 30px; }
.modal-panel p { margin: 0 0 22px; line-height: 1.7; color: rgba(255,255,255,.82); }
.modal-panel form { display: grid; gap: 14px; }
.modal-panel label { display: grid; gap: 8px; color: rgba(255,255,255,.86); font-size: 14px; }
.modal-panel input,
.modal-panel textarea { width: 100%; border: 1px solid rgba(255,255,255,.16); border-radius: 14px; padding: 13px 14px; color: #fff; background: rgba(255,255,255,.10); outline: none; resize: vertical; }
.modal-panel input::placeholder,
.modal-panel textarea::placeholder { color: rgba(255,255,255,.50); }
.modal-panel input:focus,
.modal-panel textarea:focus { border-color: rgba(21,229,255,.8); box-shadow: 0 0 0 4px rgba(21,229,255,.12); }
.modal-panel small { display: block; margin-top: 14px; color: rgba(255,255,255,.58); line-height: 1.5; }
.toast { position: fixed; left: 50%; bottom: 26px; z-index: 110; transform: translateX(-50%) translateY(16px); padding: 12px 18px; border-radius: 999px; color: #fff; background: rgba(0,13,52,.78); border: 1px solid rgba(255,255,255,.14); backdrop-filter: blur(10px); opacity: 0; pointer-events: none; transition: .22s ease; }
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }
.back-top { position: fixed; right: 28px; bottom: 28px; z-index: 80; width: 46px; height: 46px; border: 1px solid rgba(255,255,255,.24); border-radius: 50%; color: #fff; background: rgba(24,40,130,.52); backdrop-filter: blur(10px); cursor: pointer; opacity: 0; transform: translateY(16px); pointer-events: none; transition: .2s ease; }
.back-top.show { opacity: 1; transform: translateY(0); pointer-events: auto; }
.back-top:hover { background: rgba(30,118,255,.7); transform: translateY(-2px); }
.progress { position: fixed; z-index: 120; left: 0; top: 0; width: 100%; height: 3px; background: rgba(255,255,255,.08); }
.progress i { display: block; width: 0; height: 100%; background: linear-gradient(90deg, var(--cyan), var(--orange)); box-shadow: 0 0 16px rgba(21,229,255,.8); }

@media (max-width: 1180px) {
  .header-inner { grid-template-columns: 220px 1fr auto; width: min(var(--wrap), calc(100% - 36px)); }
  .main-nav { gap: 30px; }
  .hero-grid, .grid-2, .architecture, .scenario-switch { grid-template-columns: 1fr; }
  .arch-core { min-height: 420px; }
  .grid-4, .timeline, .process-grid { grid-template-columns: repeat(2,1fr); }
  .grid-3 { grid-template-columns: repeat(2,1fr); }
  .scenario-menu { position: static; grid-template-columns: repeat(2,1fr); }
  .tab-panel { grid-template-columns: 1fr; }
}
@media (max-width: 820px) {
  .site-header { height: 70px; }
  .header-inner { grid-template-columns: 1fr auto; gap: 12px; }
  .header-actions { display: none; }
  .mobile-toggle { display: block; }
  .main-nav { position: fixed; top: 70px; left: 18px; right: 18px; display: grid; gap: 0; padding: 14px; border-radius: 20px; background: rgba(12, 22, 92, .96); border: 1px solid rgba(255,255,255,.16); box-shadow: var(--shadow); transform: translateY(-18px); opacity: 0; pointer-events: none; transition: .2s ease; }
  .main-nav.open { transform: translateY(0); opacity: 1; pointer-events: auto; }
  .main-nav a, .site-header.is-scrolled .main-nav a { padding: 14px 12px; border-radius: 12px; }
  .main-nav a::after { display: none; }
  .main-nav a.active { background: rgba(21,229,255,.1); }
  .page-hero { min-height: auto; padding: 126px 0 74px; }
  .hero-grid, .section .wrap, .footer-inner, .band { width: calc(100% - 36px); }
  h1 { font-size: 42px; }
  .hero-copy p { font-size: 16px; }
  .hero-panel { min-height: auto; }
  .hero-panel img { height: 260px; }
  .panel-overlay { display: none; }
  .section { padding: 76px 0; }
  .grid-3, .grid-4, .timeline, .process-grid, .kpi-row, .footer-inner { grid-template-columns: 1fr; }
  .scenario-menu { grid-template-columns: 1fr; }
  .scenario-visual img { height: 500px; }
  .scenario-content { left: 24px; right: 24px; top: 28px; width: auto; }
  .scenario-content h3 { font-size: 30px; }
  .tab-list { flex-direction: column; }
  .band { display: grid; padding: 30px 24px; }
  .band h2 { font-size: 28px; }
  .copyright { grid-column: auto; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation: none !important; transition: none !important; }
}


/* 去除页脚、底部联系栏和顶部联系方式按钮 */
.site-footer,
.footer-inner,
.header-actions,
.contact-band { display: none !important; }