/* =========================================================
   VIMO Landing Page · Tech / Dark / Glassmorphism
   ========================================================= */

/* -------- Reset & Base -------- */
*, *::before, *::after { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { font: inherit; }
ul, li { list-style: none; padding: 0; margin: 0; }

:root {
  /* Color tokens */
  --bg: #06080f;
  --bg-2: #0b0f1a;
  --surface: rgba(255, 255, 255, 0.04);
  --surface-2: rgba(255, 255, 255, 0.06);
  --border: rgba(255, 255, 255, 0.08);
  --border-strong: rgba(255, 255, 255, 0.14);
  --text: #e7ecf3;
  --text-dim: #aab3c2;
  --text-mute: #6e7787;

  /* Accents */
  --cyan: #00d4ff;
  --violet: #7c5cff;
  --pink: #ff5cb1;
  --green: #2ee6a8;
  --orange: #ff9f5c;
  --blue: #5c8bff;

  --grad: linear-gradient(135deg, #00d4ff 0%, #7c5cff 50%, #ff5cb1 100%);
  --grad-soft: linear-gradient(135deg, rgba(0,212,255,.18), rgba(124,92,255,.18));

  /* Typography */
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;

  /* Layout */
  --container: 1200px;
  --radius: 18px;
  --radius-sm: 12px;

  /* Shadow */
  --shadow-lg: 0 20px 60px rgba(0,0,0,.45);
  --shadow-md: 0 10px 30px rgba(0,0,0,.35);
}

body {
  font-family: var(--font);
  color: var(--text);
  background: var(--bg);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

/* -------- Container -------- */
.container {
  width: 100%;
  max-width: var(--container);
  padding: 0 24px;
  margin: 0 auto;
}

/* -------- Background decorations -------- */
.bg-decor {
  position: fixed;
  inset: 0;
  z-index: -1;
  overflow: hidden;
  background:
    radial-gradient(1200px 800px at 80% -10%, rgba(124,92,255,.18), transparent 60%),
    radial-gradient(1000px 700px at -10% 30%, rgba(0,212,255,.15), transparent 55%),
    radial-gradient(900px 600px at 50% 110%, rgba(255,92,177,.12), transparent 55%),
    var(--bg);
}
.grid-overlay {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(255,255,255,.04) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255,255,255,.04) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(ellipse at center, #000 30%, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse at center, #000 30%, transparent 75%);
  opacity: .5;
}
.orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(60px);
  opacity: .55;
  animation: float 18s ease-in-out infinite;
}
.orb-1 { width: 420px; height: 420px; background: #00d4ff; top: -120px; left: -120px; opacity: .25; }
.orb-2 { width: 520px; height: 520px; background: #7c5cff; bottom: -180px; right: -160px; opacity: .25; animation-delay: -6s; }
.orb-3 { width: 360px; height: 360px; background: #ff5cb1; top: 40%; right: 30%; opacity: .12; animation-delay: -12s; }

@keyframes float {
  0%, 100% { transform: translate(0,0) scale(1); }
  50% { transform: translate(40px, -30px) scale(1.06); }
}

/* -------- Buttons -------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 22px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 15px;
  letter-spacing: .02em;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform .25s ease, box-shadow .25s ease, background .25s ease, border-color .25s ease;
  white-space: nowrap;
}
.btn-sm { padding: 9px 18px; font-size: 14px; }
.btn-primary {
  color: #06080f;
  background: var(--grad);
  box-shadow: 0 10px 30px rgba(124,92,255,.35);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 14px 38px rgba(124,92,255,.5); }
.btn-ghost {
  color: var(--text);
  background: var(--surface);
  border-color: var(--border-strong);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}
.btn-ghost:hover { background: var(--surface-2); border-color: rgba(255,255,255,.25); transform: translateY(-2px); }

/* -------- Navbar -------- */
.navbar {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  background: rgba(11, 15, 26, .55);
  border-bottom: 1px solid transparent;
  transition: border-color .3s ease, background .3s ease;
}
.navbar.scrolled {
  background: rgba(11, 15, 26, .82);
  border-bottom-color: var(--border);
}
.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
}
.logo { display: inline-flex; align-items: center; gap: 10px; font-weight: 800; }
.logo-text {
  font-size: 20px;
  letter-spacing: .12em;
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.nav-links { display: flex; gap: 32px; }
.nav-links a {
  color: var(--text-dim);
  font-size: 15px;
  font-weight: 500;
  position: relative;
  transition: color .25s;
}
.nav-links a:hover { color: var(--text); }
.nav-links a::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: -6px;
  width: 0;
  height: 2px;
  background: var(--grad);
  border-radius: 2px;
  transition: width .25s ease, left .25s ease;
}
.nav-links a:hover::after { width: 100%; left: 0; }
.nav-actions { display: flex; align-items: center; gap: 12px; }

/* 语言切换器 */
.lang-switcher { position: relative; }
.lang-trigger {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 12px;
  border-radius: 999px;
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text-dim);
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  transition: color .2s, border-color .2s, background .2s;
}
.lang-trigger:hover {
  color: var(--text);
  border-color: var(--border-strong);
  background: var(--surface-2);
}
.lang-chev { transition: transform .25s; }
.lang-switcher.open .lang-chev { transform: rotate(180deg); }
.lang-menu {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  min-width: 168px;
  padding: 6px;
  border-radius: 12px;
  background-color: #0e1424;
  border: 1px solid rgba(255, 255, 255, 0.14);
  box-shadow: 0 24px 60px rgba(0, 0, 0, .6), 0 6px 16px rgba(0, 0, 0, .45);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-4px);
  transition: opacity .2s, transform .2s, visibility .2s;
  z-index: 100;
}
.lang-switcher.open .lang-menu {
  opacity: 1;
  visibility: visible;
  transform: none;
}
.lang-menu a {
  display: block;
  padding: 9px 12px;
  border-radius: 8px;
  color: var(--text-dim);
  font-size: 14px;
  transition: background .18s, color .18s;
}
.lang-menu a:hover { background: var(--surface-2); color: var(--text); }
.lang-menu a.is-active {
  color: var(--text);
  background: rgba(0, 212, 255, .08);
}
.lang-menu a.is-active::after {
  content: "✓";
  float: right;
  color: var(--cyan);
  font-weight: 700;
}

.nav-toggle {
  display: none;
  width: 40px; height: 40px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 4px;
  cursor: pointer;
}
.nav-toggle span {
  display: block;
  width: 18px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: transform .25s, opacity .25s;
}
.nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

/* -------- Hero -------- */
.hero { padding: 80px 0 100px; position: relative; }
.hero-inner {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 60px;
  align-items: center;
}
.badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  border-radius: 999px;
  background: var(--surface);
  border: 1px solid var(--border-strong);
  font-size: 13px;
  color: var(--text-dim);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}
.badge-dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 12px var(--cyan);
  animation: pulse 2s ease-in-out infinite;
}
@keyframes pulse {
  0%,100% { opacity: 1; transform: scale(1); }
  50% { opacity: .55; transform: scale(.85); }
}
.hero-title {
  font-size: clamp(36px, 6vw, 68px);
  line-height: 1.08;
  letter-spacing: -.02em;
  margin: 22px 0 18px;
  font-weight: 800;
}
.grad-text {
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.hero-sub {
  color: var(--text-dim);
  font-size: clamp(15px, 1.5vw, 18px);
  max-width: 520px;
  margin: 0 0 32px;
}
.hero-cta { display: flex; flex-wrap: wrap; gap: 14px; margin-bottom: 40px; }
.hero-meta {
  display: flex;
  gap: 36px;
  border-top: 1px solid var(--border);
  padding-top: 24px;
  flex-wrap: wrap;
}
.meta-item strong {
  display: block;
  font-size: 28px;
  font-weight: 800;
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  line-height: 1.1;
}
.meta-item span { font-size: 13px; color: var(--text-mute); }

/* Hero visual: phone */
.hero-visual {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 560px;
}
.phone-frame {
  position: relative;
  width: 280px;
  height: 560px;
  border-radius: 42px;
  background: linear-gradient(160deg, rgba(255,255,255,.12), rgba(255,255,255,.02));
  border: 1px solid var(--border-strong);
  padding: 12px;
  box-shadow: var(--shadow-lg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  animation: floatY 6s ease-in-out infinite;
}
.phone-glow {
  position: absolute;
  inset: -40px;
  background: var(--grad);
  filter: blur(60px);
  opacity: .35;
  z-index: -1;
  border-radius: 60px;
}
.phone-screen {
  width: 100%;
  height: 100%;
  border-radius: 32px;
  background: linear-gradient(180deg, #0b1224 0%, #07091a 100%);
  padding: 22px 18px 18px;
  display: flex;
  flex-direction: column;
  position: relative;
  overflow: hidden;
}
.ps-statusbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 11px;
  color: #cbd3e1;
  margin-bottom: 14px;
}
.ps-dots { display: inline-flex; gap: 4px; }
.ps-dots i { width: 4px; height: 4px; border-radius: 50%; background: #cbd3e1; }
.ps-title {
  font-size: 22px;
  font-weight: 800;
  letter-spacing: .15em;
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  margin-bottom: 18px;
}
.ps-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 10px;
  flex: 1;
}
.ps-card {
  background: rgba(255,255,255,.05);
  border: 1px solid rgba(255,255,255,.08);
  border-radius: 14px;
  padding: 12px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  font-size: 13px;
  color: var(--text-dim);
  transition: transform .3s, background .3s;
}
.ps-card .ic { font-size: 22px; }
.ps-card b { color: var(--text); }
.ps-card:hover { transform: translateY(-3px); background: rgba(255,255,255,.08); }
.ps-card--chat { border-color: rgba(0,212,255,.35); }
.ps-card--read { border-color: rgba(124,92,255,.35); }
.ps-card--video { border-color: rgba(255,92,177,.35); }
.ps-card--speed { border-color: rgba(46,230,168,.35); }
.ps-card--ai { border-color: rgba(255,159,92,.35); }
.ps-bar {
  width: 100px;
  height: 4px;
  border-radius: 4px;
  background: var(--text);
  opacity: .8;
  margin: 14px auto 0;
}

@keyframes floatY {
  0%,100% { transform: translateY(0); }
  50% { transform: translateY(-12px); }
}

.float-chip {
  position: absolute;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 14px;
  border-radius: 999px;
  background: rgba(255,255,255,.07);
  border: 1px solid var(--border-strong);
  font-size: 13px;
  color: var(--text);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: var(--shadow-md);
  animation: floatY 5s ease-in-out infinite;
}
.float-chip span { font-size: 16px; }
.chip-1 { top: 10%; left: 4%; animation-delay: -1s; }
.chip-2 { bottom: 16%; left: 0; animation-delay: -3s; }
.chip-3 { top: 30%; right: 0; animation-delay: -2s; }

/* -------- Section base -------- */
.section { padding: 110px 0; position: relative; }
.section-alt { background: linear-gradient(180deg, transparent, rgba(255,255,255,.015), transparent); }
.section-head { text-align: center; max-width: 720px; margin: 0 auto 64px; }
.eyebrow {
  display: inline-block;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--cyan);
  padding: 4px 12px;
  border: 1px solid rgba(0,212,255,.4);
  border-radius: 999px;
  background: rgba(0,212,255,.08);
}
.eyebrow-cyan { color: var(--cyan); border-color: rgba(0,212,255,.4); background: rgba(0,212,255,.08); }
.eyebrow-violet { color: var(--violet); border-color: rgba(124,92,255,.4); background: rgba(124,92,255,.08); }
.eyebrow-pink { color: var(--pink); border-color: rgba(255,92,177,.4); background: rgba(255,92,177,.08); }
.eyebrow-green { color: var(--green); border-color: rgba(46,230,168,.4); background: rgba(46,230,168,.08); }
.eyebrow-orange { color: var(--orange); border-color: rgba(255,159,92,.4); background: rgba(255,159,92,.08); }
.section-title {
  font-size: clamp(30px, 4.4vw, 48px);
  font-weight: 800;
  letter-spacing: -.02em;
  margin: 16px 0 14px;
  line-height: 1.2;
}
.section-desc { color: var(--text-dim); font-size: 17px; margin: 0; }

/* -------- Feature grid -------- */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}
.feature-card {
  position: relative;
  padding: 32px 28px;
  border-radius: var(--radius);
  background: var(--surface);
  border: 1px solid var(--border);
  transition: transform .35s ease, border-color .35s ease, background .35s ease;
  overflow: hidden;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}
.feature-card::before {
  content: "";
  position: absolute;
  inset: 0;
  background: var(--grad-soft);
  opacity: 0;
  transition: opacity .35s ease;
  pointer-events: none;
}
.feature-card:hover { transform: translateY(-6px); border-color: var(--border-strong); }
.feature-card:hover::before { opacity: 1; }
.feature-card > * { position: relative; }
.fc-icon {
  width: 52px; height: 52px;
  border-radius: 14px;
  display: grid; place-items: center;
  background: var(--grad-soft);
  border: 1px solid var(--border-strong);
  margin-bottom: 18px;
  color: var(--text);
}
.fc-icon svg { width: 26px; height: 26px; }
.feature-card[data-color="cyan"]   .fc-icon { color: var(--cyan); }
.feature-card[data-color="violet"] .fc-icon { color: var(--violet); }
.feature-card[data-color="pink"]   .fc-icon { color: var(--pink); }
.feature-card[data-color="green"]  .fc-icon { color: var(--green); }
.feature-card[data-color="orange"] .fc-icon { color: var(--orange); }
.feature-card[data-color="blue"]   .fc-icon { color: var(--blue); }

.feature-card h3 { font-size: 20px; margin: 0 0 10px; font-weight: 700; }
.feature-card p { color: var(--text-dim); margin: 0 0 16px; font-size: 15px; }
.feature-card p strong { color: var(--text); font-weight: 600; }
.fc-tags { display: flex; flex-wrap: wrap; gap: 6px; }
.fc-tags li {
  font-size: 12px;
  color: var(--text-dim);
  padding: 4px 10px;
  border-radius: 999px;
  background: rgba(255,255,255,.04);
  border: 1px solid var(--border);
}

/* -------- Highlight rows -------- */
.highlight {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
  margin-bottom: 80px;
}
.highlight.reverse > .highlight-text { order: 2; }
.highlight:last-child { margin-bottom: 0; }
.highlight-text h3 {
  font-size: clamp(24px, 3vw, 36px);
  margin: 16px 0 16px;
  font-weight: 800;
  line-height: 1.2;
}
.highlight-text p { color: var(--text-dim); margin: 0 0 18px; font-size: 16px; }
.check-list { display: flex; flex-direction: column; gap: 10px; }
.check-list li {
  position: relative;
  padding-left: 28px;
  color: var(--text-dim);
  font-size: 15px;
}
.check-list li::before {
  content: "";
  position: absolute;
  left: 0; top: 7px;
  width: 18px; height: 18px;
  border-radius: 50%;
  background: var(--grad);
  mask: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'><path d='M5 12l5 5 9-11' fill='none' stroke='black' stroke-width='3' stroke-linecap='round' stroke-linejoin='round'/></svg>") center / 70% no-repeat;
  -webkit-mask: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'><path d='M5 12l5 5 9-11' fill='none' stroke='black' stroke-width='3' stroke-linecap='round' stroke-linejoin='round'/></svg>") center / 70% no-repeat;
}

.highlight-visual { position: relative; display: grid; place-items: center; }
.hv-card {
  position: relative;
  width: 100%;
  max-width: 460px;
  min-height: 320px;
  padding: 28px;
  border-radius: var(--radius);
  background: linear-gradient(160deg, rgba(255,255,255,.08), rgba(255,255,255,.02));
  border: 1px solid var(--border-strong);
  box-shadow: var(--shadow-lg);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
}
.hv-tag {
  position: absolute;
  bottom: 14px;
  right: 14px;
  font-size: 12px;
  color: var(--text-dim);
  background: rgba(0,0,0,.35);
  padding: 5px 10px;
  border-radius: 999px;
  border: 1px solid var(--border);
}

/* Chat visual */
.hv-chat { display: flex; flex-direction: column; gap: 12px; }
.bubble {
  max-width: 80%;
  padding: 12px 16px;
  border-radius: 18px;
  font-size: 14px;
  line-height: 1.5;
}
.bubble-in { align-self: flex-start; background: rgba(255,255,255,.06); border: 1px solid var(--border); border-bottom-left-radius: 6px; }
.bubble-out { align-self: flex-end; background: var(--grad); color: #06080f; font-weight: 600; border-bottom-right-radius: 6px; }

/* Read visual */
.hv-read { display: flex; align-items: center; justify-content: center; }
.book-row { display: flex; gap: 14px; perspective: 800px; }
.book {
  width: 70px; height: 110px;
  border-radius: 6px;
  background: linear-gradient(135deg, #2a3354, #0f1426);
  border: 1px solid var(--border-strong);
  box-shadow: 0 12px 30px rgba(0,0,0,.45);
  transform: rotateY(-12deg);
  transition: transform .3s;
}
.book:hover { transform: rotateY(0) translateY(-6px); }
.book-1 { background: linear-gradient(135deg, #00d4ff, #0a4080); }
.book-2 { background: linear-gradient(135deg, #7c5cff, #2a1d70); }
.book-3 { background: linear-gradient(135deg, #ff5cb1, #6b1a4f); }
.book-4 { background: linear-gradient(135deg, #2ee6a8, #0d4a37); }

/* Video visual */
.hv-video { display: grid; grid-template-columns: 2fr 1fr; gap: 12px; min-height: 320px; }
.poster { border-radius: 12px; min-height: 140px; border: 1px solid var(--border-strong); }
.poster-1 { grid-row: span 2; background: linear-gradient(135deg, #1a2542, #4d2bff 60%, #ff5cb1); }
.poster-2 { background: linear-gradient(135deg, #00d4ff, #0d2a40); }
.poster-3 { background: linear-gradient(135deg, #ff9f5c, #4a1f0c); }

/* Speed / network visual */
.hv-speed {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 22px;
  padding-top: 32px;
}
.speed-globe {
  position: relative;
  width: 180px;
  height: 180px;
  flex-shrink: 0;
}
.globe-core {
  position: absolute;
  top: 50%; left: 50%;
  width: 76px; height: 76px;
  border-radius: 50%;
  background: radial-gradient(circle at 30% 30%, var(--green) 0%, #0e6b4d 60%, #062a1f 100%);
  transform: translate(-50%, -50%);
  box-shadow: 0 0 50px rgba(46,230,168,.45), inset 0 0 30px rgba(0,0,0,.4);
}
.globe-core::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: 50%;
  background:
    repeating-linear-gradient(0deg, transparent 0 12px, rgba(255,255,255,.18) 12px 13px),
    repeating-linear-gradient(90deg, transparent 0 12px, rgba(255,255,255,.12) 12px 13px);
  mix-blend-mode: overlay;
  opacity: .8;
}
.globe-ring {
  position: absolute;
  inset: 0;
  border-radius: 50%;
  border: 1px solid rgba(46,230,168,.45);
  animation: spin 9s linear infinite;
}
.globe-ring::after {
  content: "";
  position: absolute;
  top: -3px; left: 50%;
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--green);
  box-shadow: 0 0 12px var(--green);
  transform: translateX(-50%);
}
.globe-ring-2 {
  inset: 24px;
  border-color: rgba(0,212,255,.45);
  animation: spin 6s linear infinite reverse;
}
.globe-ring-2::after { background: var(--cyan); box-shadow: 0 0 12px var(--cyan); }
@keyframes spin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}
.node {
  position: absolute;
  width: 8px; height: 8px;
  border-radius: 50%;
  animation: pulse 2.4s ease-in-out infinite;
}
.node-1 { top: 6%;  left: 18%; background: var(--cyan);   box-shadow: 0 0 12px var(--cyan); }
.node-2 { top: 14%; right: 8%; background: var(--violet); box-shadow: 0 0 12px var(--violet); animation-delay: -.6s; }
.node-3 { bottom: 10%; left: 8%; background: var(--green); box-shadow: 0 0 12px var(--green); animation-delay: -1.2s; }
.node-4 { bottom: 18%; right: 14%; background: var(--orange); box-shadow: 0 0 12px var(--orange); animation-delay: -1.8s; }

.speed-stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  width: 100%;
}
.speed-stat {
  text-align: center;
  padding: 14px 10px;
  background: rgba(255,255,255,.04);
  border: 1px solid var(--border);
  border-radius: 12px;
}
.speed-stat span { color: var(--text-mute); font-size: 12px; display: block; margin-bottom: 4px; }
.speed-stat b {
  font-size: 22px;
  font-weight: 800;
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  display: inline-flex;
  align-items: baseline;
  gap: 2px;
}
.speed-stat b i {
  font-style: normal;
  font-size: 12px;
  color: var(--text-dim);
  -webkit-text-fill-color: var(--text-dim);
  font-weight: 600;
  margin-left: 2px;
}

/* AI visual */
.hv-ai { display: flex; flex-direction: column; gap: 14px; justify-content: center; }
.ai-line {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 16px;
  border-radius: 12px;
  background: rgba(255,255,255,.04);
  border: 1px solid var(--border);
  font-weight: 600;
}
.dot { width: 10px; height: 10px; border-radius: 50%; }
.dot-cyan   { background: var(--cyan);   box-shadow: 0 0 10px var(--cyan); }
.dot-violet { background: var(--violet); box-shadow: 0 0 10px var(--violet); }
.dot-pink   { background: var(--pink);   box-shadow: 0 0 10px var(--pink); }
.dot-green  { background: var(--green);  box-shadow: 0 0 10px var(--green); }

/* -------- CTA / Download -------- */
.section-cta { padding: 80px 0 110px; }
.cta-card {
  position: relative;
  text-align: center;
  padding: 64px 32px;
  border-radius: 28px;
  background:
    radial-gradient(800px 300px at 50% 0%, rgba(124,92,255,.25), transparent 60%),
    linear-gradient(160deg, rgba(255,255,255,.05), rgba(255,255,255,.02));
  border: 1px solid var(--border-strong);
  overflow: hidden;
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
}
.cta-card::before {
  content: "";
  position: absolute;
  inset: -1px;
  border-radius: inherit;
  padding: 1px;
  background: var(--grad);
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  opacity: .35;
  pointer-events: none;
}
.cta-card .section-title { margin-top: 14px; }
.cta-card .section-desc { margin-bottom: 36px; }

/* 已开放平台 · 多源/多版本下载块 */
.dl-block {
  max-width: 880px;
  margin: 0 auto 18px;
  padding: 24px;
  border-radius: 18px;
  background: linear-gradient(160deg, rgba(46,230,168,.08), rgba(0,212,255,.04));
  border: 1px solid rgba(46,230,168,.25);
  text-align: left;
}
.dl-block:last-of-type { margin-bottom: 32px; }
.dl-block-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 16px;
  flex-wrap: wrap;
  gap: 8px;
}
.dl-platform {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-weight: 700;
  font-size: 16px;
  color: var(--text);
}
.dl-platform svg { color: var(--green); }
.dl-tag {
  font-size: 12px;
  padding: 4px 10px;
  border-radius: 999px;
  font-weight: 600;
}
.dl-tag--ready {
  color: var(--green);
  background: rgba(46,230,168,.12);
  border: 1px solid rgba(46,230,168,.4);
}

.dl-sources {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
}
.dl-source {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 14px 16px;
  border-radius: 12px;
  background: rgba(255,255,255,.04);
  border: 1px solid var(--border-strong);
  transition: transform .25s, background .25s, border-color .25s;
  text-align: left;
}
.dl-source:hover {
  transform: translateY(-2px);
  background: rgba(255,255,255,.08);
  border-color: rgba(255,255,255,.25);
}
.dl-source--primary {
  background: linear-gradient(135deg, rgba(0,212,255,.12), rgba(124,92,255,.12));
  border-color: rgba(124,92,255,.4);
}
.dl-source--primary:hover { border-color: rgba(124,92,255,.65); }

.ds-badge {
  flex-shrink: 0;
  width: 40px; height: 40px;
  border-radius: 10px;
  display: grid; place-items: center;
  font-weight: 800;
  font-size: 16px;
  color: white;
}
.ds-badge--lan      { background: linear-gradient(135deg, #00b9ff, #0078d4); }
.ds-badge--quark    { background: linear-gradient(135deg, #7c5cff, #4d2bff); }
.ds-badge--baidu    { background: linear-gradient(135deg, #2563eb, #1e40af); }
.ds-badge--site     { background: var(--grad); color: #06080f; }
.ds-badge--portable { background: linear-gradient(135deg, #5c8bff, #2e3b6e); }
.ds-badge--installer{ background: var(--grad); color: #06080f; }
.ds-badge--apple-silicon { background: var(--grad); color: #06080f; }
.ds-badge--intel    { background: linear-gradient(135deg, #64748b, #334155); }

.ds-meta { flex: 1; display: flex; flex-direction: column; line-height: 1.25; min-width: 0; }
.ds-meta small { font-size: 11px; color: var(--text-mute); order: 2; }
.ds-meta b { font-size: 15px; font-weight: 700; order: 1; }

.ds-arrow {
  width: 16px; height: 16px;
  color: var(--text-mute);
  transition: transform .25s, color .25s;
  flex-shrink: 0;
}
.dl-source:hover .ds-arrow { color: var(--text); transform: translate(2px, -2px); }

.dl-note {
  margin: 14px 0 0;
  font-size: 12px;
  color: var(--text-mute);
  text-align: center;
}

/* 其他平台：未开放 */
.dl-others {
  max-width: 880px;
  margin: 0 auto 32px;
}
.dl-others-label {
  font-size: 12px;
  color: var(--text-mute);
  letter-spacing: .15em;
  text-transform: uppercase;
  margin-bottom: 12px;
  text-align: left;
}
.dl-others-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
}
.dl-others-grid--2 { grid-template-columns: repeat(2, 1fr); }
.dl-others-grid--1 {
  grid-template-columns: minmax(0, 380px);
  justify-content: center;
}
.dl-soon {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 18px;
  border-radius: 12px;
  background: rgba(255,255,255,.02);
  border: 1px dashed var(--border-strong);
  color: var(--text-mute);
  cursor: not-allowed;
  user-select: none;
}
.dl-soon svg { color: var(--text-mute); flex-shrink: 0; }
.dl-soon span { display: flex; flex-direction: column; line-height: 1.25; text-align: left; }
.dl-soon b { font-size: 14px; font-weight: 700; color: var(--text-dim); }
.dl-soon small { font-size: 11px; color: var(--text-mute); }

.qrcode-tip {
  display: inline-flex;
  align-items: center;
  gap: 18px;
  padding: 18px 22px;
  border-radius: 18px;
  background: rgba(255,255,255,.04);
  border: 1px solid var(--border);
  text-align: left;
}
.qrcode-tip strong { display: block; font-size: 15px; }
.qrcode-tip p { margin: 4px 0 0; color: var(--text-dim); font-size: 13px; }
.qr-box {
  width: 76px; height: 76px;
  border-radius: 12px;
  background: white;
  display: grid; place-items: center;
  flex-shrink: 0;
  padding: 6px;
}
.qr-box img { width: 100%; height: 100%; display: block; }

/* -------- FAQ -------- */
.faq-list { max-width: 780px; margin: 0 auto; display: flex; flex-direction: column; gap: 12px; }
.faq-item {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 4px 22px;
  transition: border-color .25s, background .25s;
}
.faq-item:hover { border-color: var(--border-strong); }
.faq-item summary {
  list-style: none;
  cursor: pointer;
  padding: 18px 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-weight: 600;
  font-size: 16px;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
  content: "+";
  font-size: 22px;
  color: var(--text-dim);
  transition: transform .25s;
  font-weight: 300;
}
.faq-item[open] summary::after { transform: rotate(45deg); }
.faq-item p { margin: 0 0 18px; color: var(--text-dim); font-size: 15px; }

/* -------- Footer -------- */
.footer {
  border-top: 1px solid var(--border);
  background: rgba(11,15,26,.6);
  padding: 60px 0 28px;
  margin-top: 40px;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}
.footer-inner {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: 48px;
  margin-bottom: 40px;
}
.footer-brand p { color: var(--text-mute); margin: 14px 0 0; font-size: 14px; }
.footer-cols { display: grid; grid-template-columns: repeat(3, 1fr); gap: 32px; }
.footer-cols h4 {
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .15em;
  text-transform: uppercase;
  color: var(--text);
  margin: 0 0 14px;
}
.footer-cols a { display: block; color: var(--text-dim); padding: 5px 0; font-size: 14px; transition: color .2s; }
.footer-cols a:hover { color: var(--text); }
.footer-bottom {
  border-top: 1px solid var(--border);
  padding-top: 22px;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  color: var(--text-mute);
  font-size: 13px;
  max-width: var(--container);
  margin: 0 auto;
  padding-left: 24px; padding-right: 24px;
}

/* -------- Reveal animation -------- */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity .8s cubic-bezier(.2,.8,.2,1), transform .8s cubic-bezier(.2,.8,.2,1);
  will-change: opacity, transform;
}
.reveal.is-visible { opacity: 1; transform: none; }

/* =========================================================
   Responsive
   ========================================================= */
@media (max-width: 1024px) {
  .hero-inner { grid-template-columns: 1fr; gap: 40px; text-align: center; }
  .hero-sub { margin-left: auto; margin-right: auto; }
  .hero-cta { justify-content: center; }
  .hero-meta { justify-content: center; }
  .hero-visual { min-height: 520px; }
  .feature-grid { grid-template-columns: repeat(2, 1fr); }
  .highlight, .highlight.reverse { grid-template-columns: 1fr; gap: 36px; }
  .highlight.reverse > .highlight-text { order: 0; }
  .footer-inner { grid-template-columns: 1fr; gap: 32px; }
}

@media (max-width: 768px) {
  .nav-links { display: none; }
  .nav-toggle { display: flex; }
  .nav-actions .btn { display: none; }
  .lang-trigger { padding: 7px 10px; gap: 4px; }
  .lang-current { display: none; }

  /* Mobile menu */
  .nav-links.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 68px;
    left: 0; right: 0;
    background: rgba(11,15,26,.96);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    padding: 18px 24px 24px;
    gap: 8px;
    border-bottom: 1px solid var(--border);
  }
  .nav-links.open a {
    padding: 12px 0;
    border-bottom: 1px solid var(--border);
    font-size: 16px;
  }
  .nav-links.open a:last-child { border-bottom: none; }

  .hero { padding: 48px 0 60px; }
  .hero-title { font-size: 38px; }
  .hero-meta { gap: 24px; padding-top: 18px; }
  .meta-item strong { font-size: 22px; }

  .hero-visual { min-height: 480px; }
  .phone-frame { width: 240px; height: 480px; }
  .float-chip { font-size: 12px; padding: 8px 12px; }

  .section { padding: 70px 0; }
  .section-head { margin-bottom: 44px; }
  .section-title { font-size: 28px; }

  .feature-grid { grid-template-columns: 1fr; gap: 14px; }
  .feature-card { padding: 26px 22px; }

  .cta-card { padding: 44px 22px; }
  .dl-block { padding: 18px; }
  .dl-sources { grid-template-columns: 1fr; }
  .dl-others-grid { grid-template-columns: 1fr; }
  .qrcode-tip { flex-direction: row; padding: 14px; }
  .qr-box { width: 64px; height: 64px; }

  .footer-cols { grid-template-columns: 1fr 1fr; gap: 24px; }
  .footer-bottom { flex-direction: column; align-items: flex-start; }
}

@media (max-width: 420px) {
  .hero-title { font-size: 32px; }
}

/* -------- Reduced motion -------- */
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  .orb, .phone-frame, .float-chip, .badge-dot { animation: none; }
  html { scroll-behavior: auto; }
}