/* ============================================================
   AI电音助手 — 新官网  style.css
   设计语言：Midnight Precision（暗色精密仪器）
   参考：Linear / Vercel / Awwwards 2025-2026 趋势
   原则：transform/opacity 动画 · hairline 边框 · 单一强调色
   ============================================================ */

:root {
  --bg: #08090a;
  --bg-2: #0f1011;
  --bg-3: #161718;
  --line: rgba(255, 255, 255, 0.07);
  --line-strong: rgba(255, 255, 255, 0.12);
  --txt: #f4f6f9;
  --txt-2: #c9cfda;
  --txt-3: #8a8f98;
  --accent: #4de3c1;
  --accent-dim: rgba(77, 227, 193, 0.14);
  --violet: #7a8cff;
  --ease: cubic-bezier(0.16, 1, 0.3, 1);
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", sans-serif;
  --mono: ui-monospace, "JetBrains Mono", "SF Mono", SFMono-Regular, Consolas, "Courier New", monospace;
  --nav-h: 68px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: auto; -webkit-text-size-adjust: 100%; }

html.lenis, html.lenis body { height: auto; }
.lenis.lenis-smooth { scroll-behavior: auto !important; }

body {
  background: var(--bg);
  color: var(--txt-2);
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.7;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

::selection { background: var(--accent); color: #04120e; }

img { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { font-family: inherit; border: 0; background: none; cursor: pointer; color: inherit; }
ul { list-style: none; }
.mono { font-family: var(--mono); letter-spacing: 0.02em; }

/* ---------- 滚动进度 ---------- */
.progress-bar {
  position: fixed; top: 0; left: 0; z-index: 1000;
  width: 100%; height: 2px;
  background: linear-gradient(90deg, var(--accent), var(--violet));
  transform: scaleX(0); transform-origin: 0 50%;
  pointer-events: none;
}

/* ---------- 自定义光标（仅桌面精确指针） ---------- */
.cursor-dot, .cursor-ring {
  position: fixed; top: 0; left: 0; z-index: 2000;
  pointer-events: none; border-radius: 50%;
  opacity: 0;
}
.cursor-dot { width: 6px; height: 6px; background: var(--accent); }
.cursor-ring {
  width: 34px; height: 34px;
  border: 1px solid rgba(77, 227, 193, 0.5);
  transition: width 0.25s var(--ease), height 0.25s var(--ease), border-color 0.25s;
}
.cursor-ring.is-hover { width: 52px; height: 52px; border-color: rgba(77, 227, 193, 0.9); }
@media (hover: none), (pointer: coarse) { .cursor-dot, .cursor-ring { display: none; } }
/* 启用自定义光标时隐藏系统原生指针（JS 加 html.has-cursor 后生效） */
@media (hover: hover) and (pointer: fine) {
  html.has-cursor, html.has-cursor * { cursor: none !important; }
}

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 14px 28px; border-radius: 10px;
  font-size: 15px; font-weight: 600; letter-spacing: 0.01em;
  transition: transform 0.2s var(--ease), box-shadow 0.25s var(--ease), background 0.25s, border-color 0.25s, color 0.25s;
  will-change: transform;
}
.btn:active { transform: scale(0.97); }
.btn--primary {
  background: var(--txt); color: #0a0a0b;
}
.btn--primary:hover { box-shadow: 0 0 0 1px rgba(77,227,193,.4), 0 8px 32px rgba(77,227,193,.25); transform: translateY(-2px); }
.btn--ghost {
  color: var(--txt); border: 1px solid var(--line-strong); background: rgba(255,255,255,0.02);
  backdrop-filter: blur(6px);
}
.btn--ghost:hover { border-color: rgba(77,227,193,.5); color: var(--accent); transform: translateY(-2px); }
.btn--pro {
  background: linear-gradient(135deg, var(--accent), #35c9d8 60%, var(--violet));
  color: #051210;
}
.btn--pro:hover { transform: translateY(-2px); box-shadow: 0 8px 32px rgba(77,227,193,.3); }
.btn--block { width: 100%; }
.btn--sm { padding: 9px 18px; font-size: 13.5px; border-radius: 8px; }

/* ---------- 导航 ---------- */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 900;
  height: var(--nav-h);
  transition: background 0.35s, border-color 0.35s, backdrop-filter 0.35s;
  border-bottom: 1px solid transparent;
}
.nav.is-scrolled {
  background: rgba(8, 9, 10, 0.72);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom-color: var(--line);
}
.nav__inner {
  max-width: 1200px; height: 100%; margin: 0 auto; padding: 0 24px;
  display: flex; align-items: center; justify-content: space-between; gap: 24px;
}
.nav__logo img { height: 34px; width: auto; }
.nav__links { display: flex; gap: 4px; }
.nav__links a {
  position: relative; padding: 8px 14px;
  font-size: 14px; color: var(--txt-3); border-radius: 8px;
  transition: color 0.2s;
}
.nav__links a:hover, .nav__links a.is-active { color: var(--txt); }
.nav__links a::after {
  content: ""; position: absolute; left: 14px; right: 14px; bottom: 4px; height: 1.5px;
  background: var(--accent); border-radius: 2px;
  transform: scaleX(0); transform-origin: 0 50%;
  transition: transform 0.3s var(--ease);
}
.nav__links a.is-active::after { transform: scaleX(1); }
.nav__cta { display: flex; align-items: center; gap: 10px; }
.nav__burger { display: none; width: 40px; height: 40px; position: relative; }
.nav__burger span {
  position: absolute; left: 10px; right: 10px; height: 1.6px; background: var(--txt);
  transition: transform 0.3s var(--ease), top 0.3s var(--ease);
}
.nav__burger span:nth-child(1) { top: 15px; }
.nav__burger span:nth-child(2) { top: 24px; }
.nav__burger.is-open span:nth-child(1) { top: 19px; transform: rotate(45deg); }
.nav__burger.is-open span:nth-child(2) { top: 19px; transform: rotate(-45deg); }

/* 移动端菜单 */
.mmenu {
  position: fixed; inset: 0; z-index: 850;
  background: rgba(8, 9, 10, 0.96);
  backdrop-filter: blur(18px);
  display: flex; flex-direction: column; justify-content: center; padding: 0 32px;
  opacity: 0; visibility: hidden;
  transition: opacity 0.4s var(--ease), visibility 0.4s;
}
.mmenu.is-open { opacity: 1; visibility: visible; }
.mmenu__links a {
  display: flex; align-items: baseline; gap: 14px;
  padding: 13px 0; font-size: 30px; font-weight: 600; color: var(--txt);
  border-bottom: 1px solid var(--line);
  transform: translateY(16px); opacity: 0;
  transition: transform 0.5s var(--ease), opacity 0.5s var(--ease), color 0.2s;
}
.mmenu.is-open .mmenu__links a { transform: none; opacity: 1; }
.mmenu__links a:nth-child(2) { transition-delay: 0.03s; }
.mmenu__links a:nth-child(3) { transition-delay: 0.06s; }
.mmenu__links a:nth-child(4) { transition-delay: 0.09s; }
.mmenu__links a:nth-child(5) { transition-delay: 0.12s; }
.mmenu__links a:nth-child(6) { transition-delay: 0.15s; }
.mmenu__links a:nth-child(7) { transition-delay: 0.18s; }
.mmenu__links a:nth-child(8) { transition-delay: 0.21s; }
.mmenu__links a:hover { color: var(--accent); }
.mmenu__links i { font-style: normal; font-family: var(--mono); font-size: 11px; color: var(--txt-3); letter-spacing: 0.14em; }
.mmenu__tel { margin-top: 32px; font-size: 13px; color: var(--txt-3); }
.mmenu__tel a { color: var(--accent); font-family: var(--mono); }

/* ---------- HERO ---------- */
.hero {
  position: relative; min-height: 100vh;
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  padding: calc(var(--nav-h) + 48px) 24px 40px;
  overflow: clip;
  text-align: center;
}
.hero__glow {
  position: absolute; border-radius: 50%; filter: blur(90px); pointer-events: none;
  will-change: transform;
}
.hero__glow--a {
  width: 720px; height: 480px; left: 50%; top: 8%;
  background: radial-gradient(ellipse at center, rgba(77,227,193,0.13), transparent 65%);
  transform: translateX(-70%);
  animation: drift 16s ease-in-out infinite alternate;
}
.hero__glow--b {
  width: 640px; height: 460px; left: 50%; top: 30%;
  background: radial-gradient(ellipse at center, rgba(122,140,255,0.11), transparent 65%);
  transform: translateX(-20%);
  animation: drift 20s ease-in-out infinite alternate-reverse;
}
@keyframes drift {
  from { translate: -30px 0; }
  to   { translate: 30px 24px; }
}
.hero__canvas {
  position: absolute; inset: 0; width: 100%; height: 100%;
  pointer-events: none;
}
.hero__inner { position: relative; z-index: 2; max-width: 1200px; width: 100%; }
.hero__eyebrow {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 8px 18px; border-radius: 999px;
  border: 1px solid var(--line-strong); background: rgba(255,255,255,0.03);
  font-family: var(--mono); font-size: 11.5px; letter-spacing: 0.16em; color: var(--txt-3);
}
.pill-dot {
  width: 6px; height: 6px; border-radius: 50%; background: var(--accent);
  box-shadow: 0 0 10px var(--accent);
  animation: pulse 2.2s ease-in-out infinite;
}
@keyframes pulse { 50% { opacity: 0.35; } }
.hero__title {
  margin: 34px 0 22px;
  font-size: clamp(52px, 9.5vw, 118px);
  font-weight: 700; line-height: 1.02; letter-spacing: -0.028em; color: var(--txt);
}
.hero__title .char { display: inline-block; will-change: transform; }
.hero__sub {
  max-width: 720px; margin: 0 auto;
  font-size: clamp(15px, 2vw, 18px); color: var(--txt-3);
}
.hero__actions { display: flex; justify-content: center; gap: 14px; margin-top: 36px; flex-wrap: wrap; }
.hero__scroll {
  position: absolute; bottom: 22px; left: 50%; transform: translateX(-50%);
  display: flex; flex-direction: column; align-items: center; gap: 8px;
  font-family: var(--mono); font-size: 10px; letter-spacing: 0.3em; color: var(--txt-3);
  z-index: 2;
}
.hero__scroll span {
  width: 1px; height: 36px; overflow: hidden; position: relative;
  background: var(--line-strong);
}
.hero__scroll span::after {
  content: ""; position: absolute; top: -100%; left: 0; width: 100%; height: 100%;
  background: var(--accent);
  animation: scrollLine 1.8s var(--ease) infinite;
}
@keyframes scrollLine { to { top: 100%; } }

/* ---------- 产品面板 ---------- */
.panel {
  max-width: 880px; margin: 56px auto 0;
  border: 1px solid var(--line-strong); border-radius: 16px;
  background: linear-gradient(180deg, rgba(22,23,24,0.88), rgba(15,16,17,0.92));
  backdrop-filter: blur(16px); -webkit-backdrop-filter: blur(16px);
  box-shadow: 0 24px 80px rgba(0,0,0,0.5), inset 0 1px 0 rgba(255,255,255,0.06);
  text-align: left; overflow: hidden;
  will-change: transform;
}
.panel__bar {
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
  padding: 13px 18px; border-bottom: 1px solid var(--line);
}
.panel__dots { display: inline-flex; gap: 6px; }
.panel__dots i { width: 10px; height: 10px; border-radius: 50%; background: var(--bg-3); border: 1px solid var(--line-strong); }
.panel__dots i:first-child { background: rgba(255,95,87,0.75); border-color: transparent; }
.panel__title { font-size: 13px; font-weight: 600; color: var(--txt-2); }
.panel__title em { font-style: normal; font-family: var(--mono); font-size: 10px; color: var(--accent); letter-spacing: 0.14em; margin-left: 6px; }
.panel__status { display: inline-flex; align-items: center; gap: 7px; font-family: var(--mono); font-size: 11px; color: var(--txt-3); }
.panel__status i { width: 6px; height: 6px; border-radius: 50%; background: var(--accent); box-shadow: 0 0 8px var(--accent); animation: pulse 2s infinite; }
.panel__body {
  display: grid; grid-template-columns: 200px 1fr 168px; gap: 20px;
  padding: 22px 24px; align-items: center;
}
.panel__label { display: block; font-family: var(--mono); font-size: 10px; letter-spacing: 0.16em; color: var(--txt-3); }
.panel__keyval {
  display: block; margin: 6px 0 4px;
  font-family: var(--mono); font-size: 44px; font-weight: 700; line-height: 1;
  background: linear-gradient(120deg, var(--txt) 30%, var(--accent));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.panel__keyval small { font-size: 18px; font-family: var(--font); font-weight: 600; color: var(--txt-2); -webkit-text-fill-color: var(--txt-2); }
.panel__meta { font-family: var(--mono); font-size: 11px; color: var(--txt-3); }
.panel__viz {
  display: flex; align-items: center; justify-content: center; gap: 4px; height: 64px;
}
.panel__viz span {
  width: 4px; height: 26%; border-radius: 3px;
  background: linear-gradient(180deg, var(--accent), rgba(77,227,193,0.25));
  animation: viz 1.15s ease-in-out infinite alternate;
  transform-origin: 50% 50%;
}
@keyframes viz {
  from { transform: scaleY(0.35); opacity: 0.6; }
  to   { transform: scaleY(1.35); opacity: 1; }
}
.panel__viz span:nth-child(3n)   { animation-duration: 0.85s; }
.panel__viz span:nth-child(4n)   { animation-duration: 1.35s; animation-delay: 0.1s; }
.panel__viz span:nth-child(5n)   { animation-duration: 0.7s;  animation-delay: 0.22s; }
.panel__viz span:nth-child(7n)   { animation-duration: 1.05s; animation-delay: 0.08s; }
.panel__knobs { display: flex; gap: 14px; justify-content: flex-end; }
.knob { text-align: center; }
.knob i {
  display: block; width: 46px; height: 46px; border-radius: 50%;
  border: 1px solid var(--line-strong); position: relative;
  background: conic-gradient(var(--accent) calc(var(--v) * 1%), var(--bg-3) 0);
}
.knob i::after {
  content: ""; position: absolute; inset: 5px; border-radius: 50%;
  background: var(--bg-2); border: 1px solid var(--line);
}
.knob i::before {
  content: ""; position: absolute; left: 50%; top: 7px; width: 2px; height: 10px;
  background: var(--accent); border-radius: 2px; z-index: 2;
  transform: translateX(-50%) rotate(calc(var(--v) * 2.7deg));
  transform-origin: 50% 16px;
}
.knob b { display: block; margin-top: 6px; font-size: 11px; font-weight: 500; color: var(--txt-3); }
.panel__foot {
  display: flex; align-items: center; gap: 10px; flex-wrap: wrap;
  padding: 14px 24px; border-top: 1px solid var(--line);
}
.chip {
  font-family: var(--mono); font-size: 11px; letter-spacing: 0.06em;
  padding: 6px 14px; border-radius: 999px;
  border: 1px solid var(--line-strong); color: var(--txt-3);
  transition: border-color 0.25s, color 0.25s, background 0.25s;
}
.chip--on, .chip:hover { border-color: rgba(77,227,193,0.55); color: var(--accent); background: var(--accent-dim); }
.panel__tip { margin-left: auto; font-size: 11.5px; color: var(--txt-3); }

/* ---------- 数据 ---------- */
.stats {
  display: flex; justify-content: center; gap: clamp(28px, 6vw, 84px);
  margin-top: 52px; padding-bottom: 8px;
}
.stats li { text-align: center; }
.stats strong {
  display: block; font-family: var(--mono); font-weight: 700;
  font-size: clamp(26px, 4vw, 40px); color: var(--txt); letter-spacing: -0.02em;
}
.stats span { font-size: 12.5px; color: var(--txt-3); }

/* ---------- 关键词跑马灯 ---------- */
.ticker {
  border-block: 1px solid var(--line); padding: 18px 0; overflow: hidden;
  background: rgba(255,255,255,0.012);
}
.ticker__track {
  display: flex; align-items: center; gap: 40px; width: max-content;
  animation: marquee 32s linear infinite;
}
.ticker__track span {
  font-family: var(--mono); font-size: 13px; letter-spacing: 0.22em;
  color: var(--txt-3); white-space: nowrap;
}
.ticker__track i { font-style: normal; font-size: 8px; color: var(--accent); opacity: 0.7; }
@keyframes marquee { to { transform: translateX(-50%); } }

/* ---------- Section 公共 ---------- */
.section { max-width: 1200px; margin: 0 auto; padding: 108px 24px 0; }
.section__head { margin-bottom: 52px; }
.section__head--center { text-align: center; }
.section__eyebrow {
  font-family: var(--mono); font-size: 12px; letter-spacing: 0.22em;
  color: var(--accent); margin-bottom: 14px;
}
.section__title {
  font-size: clamp(30px, 4.6vw, 52px); font-weight: 700;
  letter-spacing: -0.022em; line-height: 1.12; color: var(--txt);
}
.section__desc { margin-top: 14px; max-width: 560px; color: var(--txt-3); font-size: 15.5px; }
.section__head--center .section__desc { margin-inline: auto; }

/* ---------- 关于 ---------- */
.about__grid {
  display: grid; grid-template-columns: 1.25fr 1fr; gap: 56px; align-items: start;
}
.about__lead { font-size: clamp(19px, 2.4vw, 24px); line-height: 1.55; color: var(--txt); font-weight: 500; }
.about__lead em { font-style: normal; color: var(--accent); }
.about__desc { margin-top: 20px; color: var(--txt-3); }
.about__tags { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 28px; }
.about__tags span {
  font-family: var(--mono); font-size: 11.5px; letter-spacing: 0.05em;
  padding: 7px 14px; border-radius: 999px;
  border: 1px solid var(--line-strong); color: var(--txt-2);
}
.about__card {
  position: relative; padding: 30px; border-radius: 16px;
  border: 1px solid var(--line-strong);
  background: var(--bg-2); overflow: hidden;
}
.about__cardRow {
  display: flex; align-items: baseline; gap: 18px;
  padding: 13px 0; border-bottom: 1px solid var(--line); font-size: 14px;
}
.about__cardRow:last-of-type { border-bottom: 0; }
.about__cardRow .mono { font-size: 10.5px; letter-spacing: 0.16em; color: var(--accent); width: 44px; flex: none; }
.about__cardRow b { font-weight: 500; color: var(--txt-2); }
.about__cardGlow {
  position: absolute; right: -60px; top: -60px; width: 220px; height: 220px;
  background: radial-gradient(circle, rgba(77,227,193,0.16), transparent 70%);
  filter: blur(30px); pointer-events: none;
}

/* ---------- Bento 功能 ---------- */
.bento {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px;
}
.bento__card {
  position: relative; padding: 30px 28px; border-radius: 16px; overflow: hidden;
  border: 1px solid var(--line); background: var(--bg-2);
  transition: transform 0.35s var(--ease), border-color 0.35s, background 0.35s;
  will-change: transform;
}
.bento__card:hover {
  transform: translateY(-5px);
  border-color: rgba(77,227,193,0.4);
  background: var(--bg-3);
}
.bento__card::after {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background: radial-gradient(420px circle at var(--mx, 50%) var(--my, 0%), rgba(77,227,193,0.07), transparent 45%);
  opacity: 0; transition: opacity 0.35s;
}
.bento__card:hover::after { opacity: 1; }
.bento__card--wide { grid-column: span 2; }
.bento__ico {
  width: 46px; height: 46px; border-radius: 12px;
  display: flex; align-items: center; justify-content: center;
  border: 1px solid var(--line-strong); color: var(--accent);
  background: var(--accent-dim);
}
.bento__ico svg { width: 22px; height: 22px; }
.bento__card h3 { margin: 20px 0 10px; font-size: 19px; font-weight: 600; color: var(--txt); letter-spacing: -0.01em; }
.bento__card p { font-size: 14px; color: var(--txt-3); }
.bento__wave {
  display: flex; align-items: center; gap: 4px; height: 44px; margin-top: 24px;
  -webkit-mask-image: linear-gradient(90deg, transparent, #000 12%, #000 88%, transparent);
  mask-image: linear-gradient(90deg, transparent, #000 12%, #000 88%, transparent);
}
.bento__wave i {
  flex: 1; height: 100%; border-radius: 2px;
  background: linear-gradient(180deg, rgba(77,227,193,0.9), rgba(77,227,193,0.08));
  transform: scaleY(0.25); transform-origin: center;
  animation: viz 1.6s ease-in-out infinite alternate;
}
.bento__wave i:nth-child(2n) { animation-duration: 1.1s; }
.bento__wave i:nth-child(3n) { animation-duration: 2s; animation-delay: 0.15s; }
.bento__wave i:nth-child(5n) { animation-duration: 0.8s; animation-delay: 0.3s; }
.bento__eq {
  position: absolute; right: 26px; bottom: 26px;
  display: flex; align-items: flex-end; gap: 3px; height: 30px; opacity: 0.85;
}
.bento__eq i {
  width: 3.5px; border-radius: 2px; background: var(--accent);
  animation: viz 0.9s ease-in-out infinite alternate;
}
.bento__eq i:nth-child(1) { height: 40%; animation-delay: 0s; }
.bento__eq i:nth-child(2) { height: 75%; animation-delay: 0.12s; }
.bento__eq i:nth-child(3) { height: 55%; animation-delay: 0.24s; }
.bento__eq i:nth-child(4) { height: 90%; animation-delay: 0.06s; }
.bento__eq i:nth-child(5) { height: 50%; animation-delay: 0.3s; }
.bento__eq i:nth-child(6) { height: 70%; animation-delay: 0.18s; }
.bento__eq i:nth-child(7) { height: 35%; animation-delay: 0.42s; }
.bento__eq i:nth-child(8) { height: 80%; animation-delay: 0.1s; }
.bento__eq i:nth-child(9) { height: 60%; animation-delay: 0.36s; }
.bento__eq i:nth-child(10) { height: 45%; animation-delay: 0.28s; }

/* ---------- 引擎指标 ---------- */
.engine { position: relative; margin-top: 108px; padding: 96px 24px; max-width: none; overflow: clip; }
.engine__inner { max-width: 1200px; margin: 0 auto; position: relative; z-index: 2; }
.engine__glow {
  position: absolute; left: 50%; top: 50%; width: 900px; height: 500px;
  transform: translate(-50%, -50%);
  background: radial-gradient(ellipse, rgba(77,227,193,0.08), transparent 60%);
  filter: blur(60px); pointer-events: none;
}
.engine__list {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; margin-top: 8px;
}
.engine__list li {
  padding: 34px 28px; border-radius: 16px;
  border: 1px solid var(--line); background: rgba(15,16,17,0.6);
  backdrop-filter: blur(8px);
  transition: transform 0.35s var(--ease), border-color 0.35s;
}
.engine__list li:hover { transform: translateY(-5px); border-color: rgba(77,227,193,0.4); }
.engine__list strong {
  display: block; font-size: clamp(38px, 4.5vw, 56px); font-weight: 700;
  letter-spacing: -0.03em; line-height: 1;
  background: linear-gradient(120deg, var(--txt) 20%, var(--accent));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.engine__list strong i { font-style: normal; font-size: 0.45em; letter-spacing: 0; }
.engine__list span { display: block; margin: 12px 0 6px; font-size: 15.5px; font-weight: 600; color: var(--txt); }
.engine__list p { font-size: 13px; color: var(--txt-3); }

/* ---------- 下载 ---------- */
.dl { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; max-width: 920px; }
.dl__card {
  position: relative; padding: 38px 34px; border-radius: 20px;
  border: 1px solid var(--line-strong); background: var(--bg-2);
  transition: transform 0.35s var(--ease), border-color 0.35s, box-shadow 0.35s;
  will-change: transform;
}
.dl__card:hover { transform: translateY(-6px); border-color: rgba(77,227,193,0.45); box-shadow: 0 20px 60px rgba(0,0,0,0.45); }
.dl__card--pro {
  background:
    radial-gradient(420px 200px at 80% -10%, rgba(77,227,193,0.1), transparent 70%),
    var(--bg-2);
}
.dl__tag {
  display: inline-block; padding: 5px 13px; border-radius: 999px;
  font-family: var(--mono); font-size: 11px; letter-spacing: 0.1em;
  border: 1px solid rgba(77,227,193,0.5); color: var(--accent); background: var(--accent-dim);
}
.dl__card h3 { margin: 18px 0 4px; font-size: 24px; font-weight: 700; color: var(--txt); letter-spacing: -0.015em; }
.dl__ver { font-size: 12px; color: var(--txt-3); margin-bottom: 22px; }
.dl__card ul { margin-bottom: 26px; }
.dl__card li {
  position: relative; padding: 7px 0 7px 24px; font-size: 14px; color: var(--txt-2);
}
.dl__card li::before {
  content: ""; position: absolute; left: 2px; top: 14px;
  width: 5px; height: 5px; border-radius: 50%; background: var(--accent);
  box-shadow: 0 0 8px rgba(77,227,193,0.8);
}
.dl__note { margin-top: 14px; text-align: center; font-size: 12px; color: var(--txt-3); }
.dl__more { margin-top: 26px; text-align: center; font-size: 13.5px; color: var(--txt-3); }
.dl__more a { color: var(--accent); border-bottom: 1px solid rgba(77,227,193,0.4); }

/* ---------- 客户 ---------- */
.customers { max-width: none; padding-inline: 0; }
.customers .section__head { max-width: 1200px; margin-inline: auto; padding-inline: 24px; }
.marquee { display: grid; gap: 16px; overflow: hidden; }
.marquee__row { overflow: hidden; -webkit-mask-image: linear-gradient(90deg, transparent, #000 8%, #000 92%, transparent); mask-image: linear-gradient(90deg, transparent, #000 8%, #000 92%, transparent); }
.marquee__track {
  display: flex; gap: 16px; width: max-content;
  animation: marquee 46s linear infinite;
}
.marquee__row--rev .marquee__track { animation-direction: reverse; }
.marquee:hover .marquee__track { animation-play-state: paused; }
.marquee__track img {
  height: 92px; width: auto; border-radius: 12px;
  border: 1px solid var(--line);
  filter: grayscale(0.9) brightness(0.9);
  transition: filter 0.35s, transform 0.35s var(--ease), border-color 0.35s;
  will-change: transform;
}
.marquee__track img:hover {
  filter: none; transform: translateY(-4px) scale(1.03);
  border-color: rgba(77,227,193,0.5);
}

/* ---------- 新闻 ---------- */
.news__grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.news__card {
  position: relative; padding: 30px; border-radius: 16px;
  border: 1px solid var(--line); background: var(--bg-2);
  transition: transform 0.35s var(--ease), border-color 0.35s, background 0.35s;
  will-change: transform;
}
.news__card:hover { transform: translateY(-5px); border-color: rgba(77,227,193,0.4); background: var(--bg-3); }
.news__card time { font-size: 11.5px; color: var(--txt-3); letter-spacing: 0.08em; }
.news__card h3 { margin: 12px 0 10px; font-size: 18.5px; font-weight: 600; color: var(--txt); line-height: 1.45; letter-spacing: -0.01em; }
.news__card p { font-size: 14px; color: var(--txt-3); }
.news__arrow {
  position: absolute; right: 26px; top: 28px;
  color: var(--txt-3); font-size: 18px;
  transition: transform 0.35s var(--ease), color 0.25s;
}
.news__card:hover .news__arrow { transform: translateX(5px); color: var(--accent); }

/* ---------- FAQ ---------- */
.faq__list { max-width: 820px; }
.faq__item {
  border-bottom: 1px solid var(--line);
  transition: border-color 0.3s;
}
.faq__item.is-open { border-bottom-color: rgba(77,227,193,0.3); }
.faq__q {
  width: 100%; display: flex; align-items: center; justify-content: space-between; gap: 20px;
  padding: 24px 4px; text-align: left;
  font-size: 17px; font-weight: 600; color: var(--txt); letter-spacing: -0.005em;
  transition: color 0.25s;
}
.faq__q:hover { color: var(--accent); }
.faq__q i {
  position: relative; flex: none; width: 26px; height: 26px; border-radius: 50%;
  border: 1px solid var(--line-strong);
}
.faq__q i::before, .faq__q i::after {
  content: ""; position: absolute; left: 50%; top: 50%; background: var(--txt-3);
  transition: transform 0.35s var(--ease), background 0.25s;
}
.faq__q i::before { width: 10px; height: 1.5px; transform: translate(-50%, -50%); }
.faq__q i::after { width: 1.5px; height: 10px; transform: translate(-50%, -50%); }
.faq__item.is-open .faq__q { color: var(--accent); }
.faq__item.is-open .faq__q i { border-color: rgba(77,227,193,0.5); }
.faq__item.is-open .faq__q i::after { transform: translate(-50%, -50%) rotate(90deg); background: var(--accent); }
.faq__item.is-open .faq__q i::before { background: var(--accent); }
.faq__a {
  display: grid; grid-template-rows: 0fr;
  transition: grid-template-rows 0.45s var(--ease);
}
.faq__a > p {
  overflow: hidden; min-height: 0;
  font-size: 14.5px; color: var(--txt-3); max-width: 700px;
}
.faq__item.is-open .faq__a { grid-template-rows: 1fr; }
.faq__item.is-open .faq__a > p { padding-bottom: 26px; }
.faq__a b { color: var(--txt-2); font-weight: 600; }

/* ---------- 联系 ---------- */
.contact { padding-bottom: 20px; }
.contact__grid { display: grid; grid-template-columns: 1fr; gap: 0; align-items: start; }
.contact__desc { margin: 16px 0 30px; color: var(--txt-3); max-width: 460px; }
.contact__list li {
  display: flex; align-items: baseline; gap: 20px;
  padding: 13px 0; border-bottom: 1px solid var(--line); font-size: 15px;
}
.contact__list .mono { font-size: 10px; letter-spacing: 0.18em; color: var(--accent); width: 92px; flex: none; }
.contact__list a { color: var(--txt); transition: color 0.2s; }
.contact__list a:hover { color: var(--accent); }
.contact__list em { font-style: normal; font-size: 12.5px; color: var(--txt-3); }
.contact__list b { font-weight: 500; color: var(--txt); }

/* ---------- FOOTER ---------- */
.footer { margin-top: 108px; border-top: 1px solid var(--line); background: var(--bg-2); }
.footer__inner {
  max-width: 1200px; margin: 0 auto; padding: 52px 24px 40px;
  display: grid; grid-template-columns: 1fr auto; gap: 32px;
}
.footer__brand img { height: 30px; width: auto; margin-bottom: 14px; }
.footer__brand p { font-size: 13.5px; color: var(--txt-2); }
.footer__brand .mono { font-size: 10px; letter-spacing: 0.2em; color: var(--txt-3); }
.footer__links { display: flex; gap: 26px; align-items: start; }
.footer__links a { font-size: 13.5px; color: var(--txt-3); transition: color 0.2s; }
.footer__links a:hover { color: var(--accent); }
.footer__legal {
  grid-column: 1 / -1; padding-top: 26px;
  border-top: 1px solid var(--line);
  display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap;
}
.footer__legal p { font-size: 12px; color: #6b7078; }
.footer__legal a { color: #6b7078; margin-right: 16px; transition: color 0.2s; }
.footer__legal a:hover { color: var(--accent); }

/* ---------- 响应式 ---------- */
.hide-sm { display: initial; }
@media (max-width: 1024px) {
  .bento { grid-template-columns: 1fr 1fr; }
  .bento__card--wide { grid-column: span 2; }
  .engine__list { grid-template-columns: 1fr 1fr; }
  .about__grid, .contact__grid { grid-template-columns: 1fr; gap: 40px; }
}
@media (max-width: 768px) {
  .section { padding-top: 76px; }
  .nav__links { display: none; }
  .nav__burger { display: block; }
  .hide-sm { display: none; }
  .hero { padding-top: calc(var(--nav-h) + 36px); }
  .panel__body { grid-template-columns: 1fr; gap: 18px; text-align: center; }
  .panel__knobs { justify-content: center; }
  .panel__tip { margin: 0 auto; }
  .panel__bar .panel__status { display: none; }
  .stats { flex-wrap: wrap; gap: 22px 34px; }
  .bento { grid-template-columns: 1fr; }
  .bento__card--wide { grid-column: span 1; }
  .engine__list { grid-template-columns: 1fr 1fr; gap: 12px; }
  .dl { grid-template-columns: 1fr; }
  .news__grid { grid-template-columns: 1fr; }
  .footer__inner { grid-template-columns: 1fr; }
  .marquee__track img { height: 64px; }
}
@media (max-width: 480px) {
  .engine__list { grid-template-columns: 1fr; }
  .hero__actions .btn { width: 100%; }
}

/* ---------- 动效初始态（JS 启用后由 GSAP 接管） ---------- */
[data-reveal] { opacity: 0; transform: translateY(28px); }
.no-js [data-reveal], .reduced-motion [data-reveal] { opacity: 1; transform: none; }

/* ---------- 公众号引流（下载区 + 悬浮组件） ---------- */
.dl__qr { display: flex; justify-content: center; margin-top: 28px; }
.dl__qrInner {
  display: flex; align-items: center; gap: 22px;
  padding: 18px 28px; border-radius: 16px;
  border: 1px solid var(--line-strong); background: var(--bg-2);
  transition: border-color 0.3s, transform 0.35s var(--ease);
}
.dl__qrInner:hover { border-color: rgba(77, 227, 193, 0.45); transform: translateY(-3px); }
.dl__qrInner img { width: 250px; height: auto; border-radius: 10px; object-fit: contain; }
.dl__qrText b { display: block; font-size: 16.5px; color: var(--txt); }
.dl__qrText p { margin-top: 6px; font-size: 13px; color: var(--txt-3); }

.qrfab { position: fixed; right: 22px; bottom: 24px; z-index: 800; }
.qrfab__btn {
  position: relative; display: flex; align-items: center; gap: 8px;
  padding: 12px 20px; border-radius: 999px;
  background: rgba(15, 16, 17, 0.88);
  border: 1px solid rgba(77, 227, 193, 0.45);
  color: var(--txt); font-size: 14px; font-weight: 600;
  backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px);
  box-shadow: 0 10px 32px rgba(0, 0, 0, 0.45);
  transition: transform 0.25s var(--ease), border-color 0.25s, color 0.25s;
}
.qrfab__btn:hover { transform: translateY(-2px); border-color: var(--accent); color: var(--accent); }
.qrfab__dot {
  position: absolute; top: -2px; right: -2px; width: 9px; height: 9px;
  border-radius: 50%; background: var(--accent);
  box-shadow: 0 0 8px var(--accent);
  animation: pulse 2s infinite;
}
.qrfab__pop {
  position: absolute; right: 0; bottom: calc(100% + 14px);
  width: 300px; padding: 16px 16px 14px; border-radius: 16px;
  background: var(--bg-2); border: 1px solid var(--line-strong);
  box-shadow: 0 24px 70px rgba(0, 0, 0, 0.55);
  opacity: 0; visibility: hidden;
  transform: translateY(10px) scale(0.97);
  transition: opacity 0.3s var(--ease), transform 0.3s var(--ease), visibility 0.3s;
}
.qrfab__pop::after {
  content: ""; position: absolute; right: 30px; bottom: -6px;
  width: 10px; height: 10px; background: var(--bg-2);
  border-right: 1px solid var(--line-strong);
  border-bottom: 1px solid var(--line-strong);
  transform: rotate(45deg);
}
.qrfab.is-open .qrfab__pop { opacity: 1; visibility: visible; transform: none; }
.qrfab__pop img { width: 100%; height: auto; border-radius: 10px; object-fit: contain; }
.qrfab__pop p { margin-top: 10px; text-align: center; font-size: 12px; line-height: 1.7; color: var(--txt-3); }
.qrfab__pop b { color: var(--txt); font-size: 13px; }

/* 备案图标 */
.beian-ico { width: 14px; height: 14px; display: inline-block; vertical-align: -2px; margin-right: 5px; }
.beian-link { white-space: nowrap; }

/* 专业版角标（紫色调区分） */
.dl__tag--pro { border-color: rgba(122, 140, 255, 0.5); color: var(--violet); background: rgba(122, 140, 255, 0.12); }

@media (max-width: 520px) {
  .dl__qrInner { flex-direction: column; text-align: center; gap: 14px; }
  .dl__qrInner img { width: 100%; max-width: 300px; }
  .qrfab__pop { width: min(300px, calc(100vw - 44px)); }
}

/* ---------- 返回顶部 ---------- */
.totop {
  position: fixed; left: 22px; bottom: 24px; z-index: 790;
  width: 44px; height: 44px; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  background: rgba(15, 16, 17, 0.85);
  border: 1px solid var(--line-strong); color: var(--txt-2);
  backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px);
  box-shadow: 0 10px 32px rgba(0, 0, 0, 0.4);
  opacity: 0; visibility: hidden; transform: translateY(12px);
  transition: opacity 0.3s var(--ease), transform 0.3s var(--ease), visibility 0.3s, border-color 0.25s, color 0.25s;
}
.totop.is-show { opacity: 1; visibility: visible; transform: none; }
.totop:hover { border-color: rgba(77, 227, 193, 0.6); color: var(--accent); transform: translateY(-2px); }

/* ---------- 新闻详情弹窗 ---------- */
.news__card.is-clickable { cursor: pointer; }
.modal {
  position: fixed; inset: 0; z-index: 1100;
  display: flex; align-items: center; justify-content: center;
  padding: 24px;
  opacity: 0; visibility: hidden;
  transition: opacity 0.35s var(--ease), visibility 0.35s;
}
.modal.is-open { opacity: 1; visibility: visible; }
.modal__mask {
  position: absolute; inset: 0;
  background: rgba(4, 5, 6, 0.78);
  backdrop-filter: blur(8px); -webkit-backdrop-filter: blur(8px);
}
.modal__card {
  position: relative; width: min(680px, 100%);
  max-height: min(78vh, 720px); overflow-y: auto;
  padding: 40px 42px 36px; border-radius: 20px;
  background: var(--bg-2); border: 1px solid var(--line-strong);
  box-shadow: 0 40px 120px rgba(0, 0, 0, 0.6);
  transform: translateY(22px) scale(0.98);
  transition: transform 0.4s var(--ease);
}
.modal.is-open .modal__card { transform: none; }
.modal__card time { font-size: 12px; color: var(--accent); letter-spacing: 0.1em; }
.modal__card h3 {
  margin: 12px 0 20px; font-size: 23px; font-weight: 700;
  line-height: 1.4; color: var(--txt); letter-spacing: -0.015em;
}
.modal__body { font-size: 15px; color: var(--txt-2); line-height: 1.9; }
.modal__body p { margin-bottom: 14px; }
.modal__body b { color: var(--txt); }
.modal__close {
  position: absolute; top: 18px; right: 18px;
  width: 36px; height: 36px; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  border: 1px solid var(--line-strong); color: var(--txt-3);
  transition: color 0.2s, border-color 0.2s, transform 0.3s var(--ease);
}
.modal__close:hover { color: var(--accent); border-color: rgba(77, 227, 193, 0.5); transform: rotate(90deg); }

/* ---------- 减少动态 ---------- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  .hero__canvas { display: none; }
}