/* 爱维智联 AeviLink 官网
   默认浅色主题见 site-light.css；本文件是深色基底（品牌墨蓝底）。主色品牌蓝，唯一强调色品牌橙（CTA / 关键数字）。
   形状规则：卡片 16px，输入框 12px，按钮与标签一律胶囊形。 */

:root {
  --ink: #050a18;
  --ink-2: #081126;
  --navy: #0b1530;
  --navy-2: #13285e;
  --blue: #2563eb;
  --glow: #5b8cff;
  --ice: #bfd3ff;
  --orange: #f28c28;
  --text: #e9eef9;
  --muted: #a3b3d1;
  --dim: #7d8fb3;
  --line: rgba(140, 175, 255, 0.14);
  --line-2: rgba(140, 175, 255, 0.24);
  --card: rgba(19, 40, 94, 0.28);
  --r-card: 16px;
  --r-input: 12px;
  --ease: cubic-bezier(0.16, 1, 0.3, 1);
  --max: 1280px;
  --font: "PingFang SC", "HarmonyOS Sans SC", "Microsoft YaHei UI", "Microsoft YaHei", "Noto Sans SC", system-ui, sans-serif;
  --font-num: "Segoe UI Variable Display", "SF Pro Display", "Segoe UI", "PingFang SC", system-ui, sans-serif;
  /* z-index 层级 */
  --z-nav: 50;
  --z-modal: 80;
  --z-toast: 90;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--ink);
  color: var(--text);
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
img, video { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; padding: 0; }
:focus-visible { outline: 2px solid var(--glow); outline-offset: 3px; border-radius: 6px; }
.svg-i { display: inline-flex; width: 1.15em; height: 1.15em; flex: none; }
.svg-i svg { width: 100%; height: 100%; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }

/* 背景氛围：固定在视口的极淡网格光晕，不随滚动重绘 */
.atmos {
  position: fixed; inset: 0; pointer-events: none; z-index: 0;
  background:
    radial-gradient(900px 600px at 85% -10%, rgba(37, 99, 235, 0.22), transparent 60%),
    radial-gradient(700px 500px at -10% 30%, rgba(19, 40, 94, 0.55), transparent 65%);
}
main, footer { position: relative; z-index: 1; }

.wrap { width: 100%; max-width: var(--max); margin: 0 auto; padding: 0 24px; }
@media (min-width: 1024px) { .wrap { padding: 0 40px; } }
section { position: relative; }
.sec { padding: 96px 0; }
@media (min-width: 1024px) { .sec { padding: 128px 0; } }

/* 文字层级 */
.eyebrow {
  display: inline-flex; align-items: center; gap: 10px;
  font-family: var(--font-num); font-size: 12px; font-weight: 600;
  letter-spacing: 0.22em; text-transform: uppercase; color: var(--glow);
}
.eyebrow::before { content: ""; width: 28px; height: 1px; background: currentColor; }
.h2 {
  margin: 0; font-size: clamp(30px, 4vw, 48px); line-height: 1.2; font-weight: 700;
  letter-spacing: -0.01em; color: #fff;
}
.h2 em { font-style: normal; color: var(--orange); }
.lead { margin: 20px 0 0; max-width: 62ch; color: var(--muted); font-size: 17px; }
.num { font-family: var(--font-num); font-variant-numeric: tabular-nums; letter-spacing: -0.02em; }

/* 按钮 */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 10px;
  height: 52px; padding: 0 28px; border-radius: 999px; white-space: nowrap;
  font-weight: 600; font-size: 16px; transition: transform .25s var(--ease), background .25s, border-color .25s, box-shadow .25s;
}
.btn:active { transform: scale(0.98); }
.btn-primary { background: var(--orange); color: #1a0d00; box-shadow: 0 10px 30px -10px rgba(242, 140, 40, 0.6); }
.btn-primary:hover { background: #ff9c3d; transform: translateY(-2px); }
.btn-ghost { border: 1px solid var(--line-2); color: #fff; background: rgba(11, 21, 48, 0.55); backdrop-filter: blur(10px); }
.btn-ghost:hover { border-color: var(--glow); background: rgba(37, 99, 235, 0.16); }
.btn .svg-i { transition: transform .25s var(--ease); }
.btn:hover .svg-i { transform: translateX(3px); }
.btn-sm { height: 40px; padding: 0 18px; font-size: 14px; }

/* ===== 导航 ===== */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: var(--z-nav);
  height: 72px; display: flex; align-items: center;
  transition: background .3s, border-color .3s, backdrop-filter .3s;
  border-bottom: 1px solid transparent;
}
.nav.scrolled { background: rgba(5, 10, 24, 0.78); backdrop-filter: blur(16px) saturate(140%); border-color: var(--line); }
.nav .wrap { display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.nav-logo img { height: 30px; width: auto; }
.nav-links { display: none; gap: 30px; font-size: 15px; color: var(--muted); }
.nav-links a { position: relative; padding: 6px 0; transition: color .2s; white-space: nowrap; }
.nav-links a:hover, .nav-links a.on { color: #fff; }
.nav-links a.on::after { content: ""; position: absolute; left: 0; right: 0; bottom: -2px; height: 2px; border-radius: 2px; background: var(--orange); }
.nav-right { display: flex; align-items: center; gap: 14px; }
.lang { display: inline-flex; border: 1px solid var(--line-2); border-radius: 999px; padding: 3px; font-size: 13px; font-family: var(--font-num); }
.lang button { padding: 4px 11px; border-radius: 999px; color: var(--muted); transition: background .2s, color .2s; }
.lang button.on { background: rgba(91, 140, 255, 0.22); color: #fff; }
.nav-cta { display: none; }
.burger { width: 40px; height: 40px; display: inline-flex; align-items: center; justify-content: center; border-radius: 999px; border: 1px solid var(--line-2); }
.burger .svg-i { width: 20px; height: 20px; }
@media (min-width: 1100px) {
  .nav-links { display: flex; }
  .nav-cta { display: inline-flex; }
  .burger { display: none; }
}
.drawer {
  position: fixed; inset: 72px 0 auto 0; z-index: var(--z-nav);
  background: rgba(5, 10, 24, 0.97); border-bottom: 1px solid var(--line);
  padding: 12px 24px 28px; display: grid; gap: 4px;
  transform: translateY(-12px); opacity: 0; pointer-events: none; transition: opacity .25s, transform .3s var(--ease);
}
.drawer.open { transform: none; opacity: 1; pointer-events: auto; }
.drawer a { padding: 12px 0; font-size: 17px; border-bottom: 1px solid var(--line); }
.drawer .btn { margin-top: 16px; }

/* ===== Hero ===== */
.hero { min-height: 100dvh; display: flex; align-items: center; padding: 112px 0 64px; overflow: hidden; }
.hero-grid { display: grid; gap: 48px; align-items: center; width: 100%; }
@media (min-width: 1024px) { .hero-grid { grid-template-columns: 1.05fr 1fr; gap: 24px; } }
.hero-badges { display: flex; flex-wrap: wrap; gap: 8px 18px; font-size: 13px; color: var(--ice); }
.hero-badges span { display: inline-flex; align-items: center; gap: 8px; }
.hero-badges .svg-i { color: var(--orange); }
.hero h1 {
  margin: 26px 0 0; font-size: clamp(42px, 6.2vw, 80px); line-height: 1.1; font-weight: 800;
  letter-spacing: -0.02em; color: #fff;
}
.hero h1 .warm { color: var(--orange); }
.hero-sub { margin: 26px 0 0; max-width: 34em; font-size: 18px; color: var(--muted); }
.hero-cta { margin-top: 38px; display: flex; flex-wrap: wrap; gap: 14px; }
.hero-visual { position: relative; aspect-ratio: 4 / 3.4; }
.hero-visual .ring {
  position: absolute; inset: 6% 4%; border-radius: 50%;
  background: radial-gradient(closest-side, rgba(37, 99, 235, 0.45), transparent 70%);
  filter: blur(20px);
}
.hero-visual img {
  position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover;
  -webkit-mask-image: radial-gradient(75% 72% at 55% 48%, #000 45%, transparent 100%);
          mask-image: radial-gradient(75% 72% at 55% 48%, #000 45%, transparent 100%);
}
@media (max-width: 1023px) { .hero { min-height: auto; } .hero-visual { max-width: 620px; margin: 0 auto; width: 100%; } }

/* 数字条 */
.stats { border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); background: rgba(8, 17, 38, 0.6); }
.stats-grid { display: grid; grid-template-columns: repeat(2, 1fr); }
.stat { padding: 30px 8px 28px 0; }
.stat .num { font-size: clamp(32px, 3.6vw, 46px); font-weight: 700; color: #fff; line-height: 1.1; }
.stat .num small { font-size: 0.5em; margin-left: 4px; color: var(--orange); font-weight: 700; }
.stat p { margin: 8px 0 0; font-size: 14px; color: var(--muted); }
@media (min-width: 768px) {
  .stats-grid { grid-template-columns: repeat(5, 1fr); }
  .stat + .stat { padding-left: 28px; border-left: 1px solid var(--line); }
}
@media (max-width: 767px) { .stat:nth-child(odd) { padding-right: 16px; } .stat:last-child { grid-column: span 2; } }

/* 伙伴 logo 走马灯（全页唯一一处） */
.partners { padding: 64px 0 24px; }
.partners h2 { margin: 0 0 28px; text-align: center; font-size: 15px; font-weight: 500; color: var(--dim); letter-spacing: 0.04em; }
.marquee { overflow: hidden; -webkit-mask-image: linear-gradient(90deg, transparent, #000 10%, #000 90%, transparent); mask-image: linear-gradient(90deg, transparent, #000 10%, #000 90%, transparent); }
.marquee-track { display: flex; gap: 16px; width: max-content; animation: marquee 46s linear infinite; }
.marquee:hover .marquee-track { animation-play-state: paused; }
.logo-chip {
  width: 176px; height: 76px; flex: none; display: flex; align-items: center; justify-content: center;
  background: rgba(240, 244, 252, 0.94); border-radius: 999px; padding: 0 30px;
}
.logo-chip img { max-height: 36px; max-width: 116px; object-fit: contain; }
@keyframes marquee { to { transform: translateX(-50%); } }

/* ===== 愿景 + 宣传片 ===== */
.vision-head { text-align: center; max-width: 900px; margin: 0 auto; }
.vision-head .h2 { font-size: clamp(34px, 5vw, 60px); margin-top: 22px; }
.vision-head .lead { margin-left: auto; margin-right: auto; }
.pillars { margin-top: 64px; display: grid; grid-template-columns: 1fr; border-top: 1px solid var(--line); }
.pillar { padding: 26px 0; border-bottom: 1px solid var(--line); }
.pillar h3 { margin: 0; font-size: 20px; color: #fff; }
.pillar p { margin: 6px 0 0; font-size: 15px; color: var(--muted); }
@media (min-width: 768px) {
  .pillars { grid-template-columns: repeat(4, 1fr); border-bottom: 1px solid var(--line); }
  .pillar { border-bottom: 0; padding: 30px 26px 30px 0; }
  .pillar + .pillar { padding-left: 26px; border-left: 1px solid var(--line); }
}
.film { margin-top: 72px; display: grid; gap: 28px; align-items: end; }
@media (min-width: 1024px) { .film { grid-template-columns: 300px 1fr; gap: 48px; } }
.film-meta h3 { margin: 0; font-size: 28px; color: #fff; line-height: 1.3; }
.film-meta p { margin: 12px 0 0; color: var(--muted); font-size: 15px; }
.film-meta ul { list-style: none; padding: 0; margin: 22px 0 0; display: grid; gap: 10px; font-size: 14px; color: var(--ice); }
.film-meta li { display: flex; gap: 10px; align-items: center; }
.film-meta li .svg-i { color: var(--orange); }
.player {
  position: relative; aspect-ratio: 16 / 9; border-radius: var(--r-card); overflow: hidden;
  border: 1px solid var(--line-2); background: #02050d;
  box-shadow: 0 40px 100px -40px rgba(37, 99, 235, 0.55);
}
.player video { width: 100%; height: 100%; object-fit: cover; }
.player-cover {
  position: absolute; inset: 0; display: flex; align-items: center; justify-content: center;
  background: linear-gradient(0deg, rgba(5, 10, 24, 0.55), rgba(5, 10, 24, 0.1));
  transition: opacity .35s;
}
.player-cover img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; z-index: -1; }
.player.playing .player-cover { opacity: 0; pointer-events: none; }
.play-btn {
  width: 88px; height: 88px; border-radius: 999px; display: flex; align-items: center; justify-content: center;
  background: var(--orange); color: #1a0d00; box-shadow: 0 0 0 12px rgba(242, 140, 40, 0.18);
  transition: transform .3s var(--ease), box-shadow .3s;
}
.play-btn .svg-i { width: 30px; height: 30px; margin-left: 4px; }
.player-cover:hover .play-btn { transform: scale(1.06); box-shadow: 0 0 0 18px rgba(242, 140, 40, 0.14); }
@media (max-width: 639px) { .play-btn { width: 60px; height: 60px; box-shadow: 0 0 0 8px rgba(242, 140, 40, 0.18); } .play-btn .svg-i { width: 22px; height: 22px; } }
.player-dur { position: absolute; right: 18px; bottom: 16px; font-size: 13px; color: var(--ice); font-family: var(--font-num); }

/* ===== 核心优势 Bento ===== */
.bento { margin-top: 56px; display: grid; gap: 16px; grid-template-columns: 1fr; }
.tile {
  position: relative; overflow: hidden; border-radius: var(--r-card);
  border: 1px solid var(--line); background: var(--card);
  padding: 30px; min-height: 240px; display: flex; flex-direction: column; justify-content: flex-end;
  transition: border-color .3s, transform .4s var(--ease);
}
.tile:hover { border-color: var(--line-2); transform: translateY(-3px); }
.tile .ico + h3 { margin-top: 28px; }
.tile h3 { margin: 0; font-size: 22px; line-height: 1.35; color: #fff; }
.tile p { margin: 10px 0 0; font-size: 15px; color: var(--muted); max-width: 40ch; }
.tile .ico { position: static; flex: none; margin-bottom: auto; width: 44px; height: 44px; border-radius: 999px; display: flex; align-items: center; justify-content: center; background: rgba(91, 140, 255, 0.14); color: var(--glow); }
.tile .ico .svg-i { width: 22px; height: 22px; }
.tile-img img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; transition: transform .8s var(--ease); }
.tile-img:hover img { transform: scale(1.04); }
.tile-img::after { content: ""; position: absolute; inset: 0; background: linear-gradient(0deg, rgba(5, 10, 24, 0.96) 8%, rgba(5, 10, 24, 0.55) 45%, rgba(5, 10, 24, 0) 75%); }
.tile-img > :not(img):not(video) { position: relative; z-index: 1; }
.tile-img video { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }
.t-nas::after { background: linear-gradient(90deg, rgba(5, 10, 24, 0.95) 12%, rgba(5, 10, 24, 0.45) 55%, rgba(5, 10, 24, 0.1)); }
/* 场景手风琴：收起时标题竖排，避免窄条里折行被裁 */
@media (min-width: 900px) {
  .acc:not(.on) .acc-body { left: 50%; right: auto; bottom: 26px; padding: 0; transform: translateX(-50%); }
  .acc:not(.on) .acc-body h3 { writing-mode: vertical-rl; letter-spacing: 0.12em; }
}
.tile .first { display: inline-flex; align-self: flex-start; margin-bottom: 14px; padding: 4px 12px; border-radius: 999px; font-size: 12px; font-weight: 700; background: var(--orange); color: #1a0d00; }
.tile-latency { background: linear-gradient(150deg, var(--navy-2), var(--navy) 70%); }
.tile-latency .big { font-size: 88px; line-height: 1; font-weight: 700; color: #fff; }
.tile-latency .big small { font-size: 36px; color: var(--orange); margin-left: 4px; }
.lat-bars { margin: 18px 0 4px; display: grid; gap: 8px; font-size: 12px; color: var(--dim); font-family: var(--font-num); }
.lat-bar { display: grid; grid-template-columns: 64px 1fr; align-items: center; gap: 10px; }
.lat-bar i { display: block; height: 6px; border-radius: 999px; background: rgba(163, 179, 209, 0.35); transform-origin: left; }
.lat-bar.us i { background: var(--orange); }
.tile-memory { background: radial-gradient(120% 120% at 100% 0%, rgba(91, 140, 255, 0.28), transparent 55%), var(--card); }
.tile-fde { background: linear-gradient(120deg, rgba(242, 140, 40, 0.14), transparent 55%), var(--card); }
.fde-steps { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 18px; }
.fde-steps span { padding: 5px 14px; border-radius: 999px; border: 1px solid var(--line-2); font-size: 13px; color: var(--ice); }
@media (min-width: 768px) {
  .bento { grid-template-columns: repeat(2, 1fr); }
  .t-walkie, .t-nas { grid-column: span 2; min-height: 380px; }
}
@media (min-width: 1100px) {
  .bento { grid-template-columns: repeat(4, 1fr); grid-template-areas: "w w l m" "w w f f" "n n n k"; }
  .t-walkie { grid-area: w; min-height: 560px; }
  .t-latency { grid-area: l; }
  .t-memory { grid-area: m; }
  .t-fde { grid-area: f; }
  .t-nas { grid-area: n; min-height: 360px; }
  .t-know { grid-area: k; }
  .t-nas p { max-width: 46ch; }
}

/* ===== AeviOS（端侧 AI） ===== */
.os-grid { display: grid; gap: 56px; }
@media (min-width: 1024px) { .os-grid { grid-template-columns: 5fr 6fr; gap: 80px; } .os-sticky { position: sticky; top: 112px; align-self: start; } }
.os-sticky .h2 { margin-top: 20px; }
.os-chip { margin-top: 36px; border-radius: var(--r-card); overflow: hidden; border: 1px solid var(--line); aspect-ratio: 16 / 10; }
.os-chip img { width: 100%; height: 100%; object-fit: cover; }
.layers { display: grid; gap: 14px; }
.layer {
  position: relative; display: grid; grid-template-columns: 64px 1fr; gap: 22px; align-items: start;
  padding: 30px 28px; border-radius: var(--r-card); border: 1px solid var(--line); background: rgba(11, 21, 48, 0.55);
}
.layer .tag {
  width: 64px; height: 64px; border-radius: 999px; display: flex; align-items: center; justify-content: center;
  font-size: 24px; font-weight: 700; color: #fff; background: linear-gradient(160deg, var(--blue), var(--navy-2));
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.18);
}
.layer:last-child .tag { background: linear-gradient(160deg, var(--orange), #b4561a); color: #1a0d00; }
.layer h3 { margin: 4px 0 0; font-size: 20px; color: #fff; }
.layer p { margin: 8px 0 0; font-size: 15px; color: var(--muted); }
.layer .chips { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 14px; }
.layer .chips span { padding: 3px 12px; border-radius: 999px; font-size: 12px; color: var(--ice); background: rgba(91, 140, 255, 0.12); font-family: var(--font-num); }

/* ===== 落地案例：横向滑动 ===== */
.cases-head { display: flex; flex-wrap: wrap; align-items: flex-end; justify-content: space-between; gap: 20px; }
.rail-ctrl { display: flex; gap: 10px; }
.rail-ctrl button { width: 48px; height: 48px; border-radius: 999px; border: 1px solid var(--line-2); display: flex; align-items: center; justify-content: center; transition: background .2s, border-color .2s; }
.rail-ctrl button:hover { background: rgba(91, 140, 255, 0.16); border-color: var(--glow); }
.rail-ctrl .prev .svg-i { transform: rotate(180deg); }
.rail {
  margin-top: 44px; display: grid; grid-auto-flow: column; grid-auto-columns: min(86vw, 440px); gap: 18px;
  overflow-x: auto; scroll-snap-type: x mandatory; padding-bottom: 12px; scrollbar-width: none;
}
.rail::-webkit-scrollbar { display: none; }
.case { scroll-snap-align: start; border-radius: var(--r-card); overflow: hidden; border: 1px solid var(--line); background: rgba(11, 21, 48, 0.6); display: flex; flex-direction: column; }
.case-img { aspect-ratio: 4 / 3.2; overflow: hidden; }
.case-img img { width: 100%; height: 100%; object-fit: cover; transition: transform .8s var(--ease); }
.case:hover .case-img img { transform: scale(1.05); }
.case-body { padding: 24px 26px 28px; flex: 1; display: flex; flex-direction: column; }
.case-kind { font-size: 12px; font-family: var(--font-num); letter-spacing: 0.12em; color: var(--orange); font-weight: 700; }
.case h3 { margin: 8px 0 0; font-size: 22px; color: #fff; }
.case p { margin: 10px 0 0; font-size: 15px; color: var(--muted); }
.case .kpis { margin-top: auto; padding-top: 20px; display: flex; flex-wrap: wrap; gap: 8px; }
.case .kpis span { padding: 4px 12px; border-radius: 999px; border: 1px solid var(--line-2); font-size: 13px; color: var(--ice); }

/* ===== 场景：手风琴图片条 ===== */
.accordion { margin-top: 52px; display: flex; gap: 12px; height: 520px; }
.acc {
  position: relative; flex: 1; min-width: 0; border-radius: var(--r-card); overflow: hidden; cursor: pointer;
  border: 1px solid var(--line); transition: flex .7s var(--ease);
}
.acc.on { flex: 4.2; }
.acc img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; transition: transform .9s var(--ease), filter .5s; filter: saturate(0.7) brightness(0.7); }
.acc.on img { filter: none; }
.acc::after { content: ""; position: absolute; inset: 0; background: linear-gradient(0deg, rgba(5, 10, 24, 0.95) 5%, rgba(5, 10, 24, 0) 60%); }
.acc-body { position: absolute; left: 0; right: 0; bottom: 0; z-index: 1; padding: 26px; }
.acc-body h3 { margin: 0; font-size: 20px; color: #fff; white-space: nowrap; }
.acc-body p { margin: 8px 0 0; font-size: 15px; color: var(--ice); max-width: 36ch; opacity: 0; transform: translateY(10px); transition: opacity .4s .15s, transform .5s .15s var(--ease); }
.acc.on .acc-body p { opacity: 1; transform: none; }
@media (max-width: 899px) {
  .accordion { flex-direction: column; height: auto; }
  .acc, .acc.on { flex: none; height: 220px; }
  .acc img { filter: none; }
  .acc-body p { opacity: 1; transform: none; }
}

/* ===== 商业价值 ===== */
.value-grid { display: grid; gap: 56px; margin-top: 56px; }
@media (min-width: 1024px) { .value-grid { grid-template-columns: 1fr 1.15fr; gap: 72px; align-items: center; } }
.vstat { display: grid; grid-template-columns: auto 1fr; gap: 0 24px; align-items: baseline; padding: 26px 0; border-bottom: 1px solid var(--line); }
.vstat:first-child { border-top: 1px solid var(--line); }
.vstat .num { font-size: clamp(48px, 6vw, 72px); font-weight: 700; color: #fff; line-height: 1; min-width: 3.4ch; }
.vstat .num small { font-size: 0.42em; color: var(--orange); margin-left: 4px; }
.vstat h3 { margin: 0; font-size: 19px; color: #fff; }
.vstat p { margin: 4px 0 0; font-size: 14px; color: var(--muted); }
.compare { display: grid; gap: 16px; }
@media (min-width: 640px) { .compare { grid-template-columns: 1fr 1fr; } }
.cmp { border-radius: var(--r-card); padding: 30px 28px; border: 1px solid var(--line); background: rgba(11, 21, 48, 0.45); }
.cmp.us { border-color: rgba(242, 140, 40, 0.5); background: linear-gradient(170deg, rgba(242, 140, 40, 0.12), rgba(11, 21, 48, 0.6) 60%); }
.cmp h3 { margin: 0 0 18px; font-size: 18px; color: #fff; }
.cmp ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 14px; }
.cmp li { display: grid; grid-template-columns: 22px 1fr; gap: 10px; font-size: 15px; color: var(--muted); line-height: 1.55; }
.cmp.us li { color: var(--text); }
.cmp li .svg-i { margin-top: 3px; }
.cmp.us li .svg-i { color: var(--orange); }
.cmp:not(.us) li .svg-i { color: var(--dim); }

/* ===== 团队 ===== */
.team-grid { display: grid; gap: 18px; margin-top: 56px; }
@media (min-width: 900px) { .team-grid { grid-template-columns: 1fr 1fr 0.9fr; } }
.founder { border-radius: var(--r-card); overflow: hidden; border: 1px solid var(--line); background: rgba(11, 21, 48, 0.6); display: flex; flex-direction: column; }
.founder-photo { position: relative; aspect-ratio: 4 / 3; overflow: hidden; background: var(--navy); }
.founder-photo .bg { position: absolute; inset: -30px; width: calc(100% + 60px); height: calc(100% + 60px); object-fit: cover; filter: blur(26px) brightness(0.45); }
.founder-photo .fg { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; object-position: center 25%; }
.founder-photo .fg.contain { object-fit: contain; object-position: center bottom; }
.founder-body { padding: 24px 26px 28px; }
.founder-body .role { font-size: 13px; font-weight: 700; color: var(--orange); }
.founder-body h3 { margin: 4px 0 0; font-size: 26px; color: #fff; }
.founder-body ul { list-style: none; padding: 0; margin: 16px 0 0; display: grid; gap: 8px; }
.founder-body li { position: relative; padding-left: 16px; font-size: 15px; color: var(--muted); line-height: 1.55; }
.founder-body li::before { content: ""; position: absolute; left: 0; top: 0.62em; width: 6px; height: 6px; border-radius: 999px; background: var(--glow); }
.experts { border-radius: var(--r-card); border: 1px solid var(--line); padding: 28px 26px; background: linear-gradient(180deg, rgba(37, 99, 235, 0.14), rgba(11, 21, 48, 0.5)); }
.experts h3 { margin: 0; font-size: 20px; color: #fff; }
.bench-num { margin-top: 26px; display: flex; align-items: baseline; gap: 12px; }
.bench-num b { font-family: var(--font-num); font-size: clamp(56px, 6vw, 76px); line-height: 1; font-weight: 700; color: #fff; letter-spacing: -0.02em; }
.bench-num b i { font-style: normal; color: var(--orange); font-size: 0.55em; margin-left: 2px; }
.bench-num span { font-size: 15px; color: var(--muted); }
.bench-txt { margin: 18px 0 0; font-size: 16px; line-height: 1.7; color: #dbe4f7; }
.experts { display: flex; flex-direction: column; }
.bench-tags { margin-top: auto; padding-top: 22px; display: flex; flex-wrap: wrap; gap: 8px; }
.bench-tags span { padding: 6px 14px; border-radius: 999px; border: 1px solid var(--line); font-size: 13px; color: #dbe4f7; background: rgba(255, 255, 255, 0.04); }
.hubs { margin-top: 18px; position: relative; border-radius: var(--r-card); overflow: hidden; border: 1px solid var(--line); min-height: 260px; display: flex; align-items: flex-end; }
.hubs img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }
.hubs::after { content: ""; position: absolute; inset: 0; background: linear-gradient(90deg, rgba(5, 10, 24, 0.92) 20%, rgba(5, 10, 24, 0.3)); }
.hubs-body { position: relative; z-index: 1; padding: 34px; display: grid; gap: 18px; }
.hubs-body h3 { margin: 0; font-size: 24px; color: #fff; max-width: 22ch; line-height: 1.4; }
.hub-list { display: flex; flex-wrap: wrap; gap: 10px 26px; font-size: 15px; color: var(--ice); }
.hub-list span { display: inline-flex; align-items: center; gap: 8px; }
.hub-list .svg-i { color: var(--orange); }

/* ===== 联系 ===== */
.contact-grid { display: grid; gap: 48px; }
@media (min-width: 1024px) { .contact-grid { grid-template-columns: 1fr 1.1fr; gap: 72px; } }
.contact-aside .h2 { font-size: clamp(32px, 4.4vw, 52px); }
.contact-lines { margin-top: 40px; display: grid; gap: 22px; }
.cline { display: grid; grid-template-columns: 44px 1fr; gap: 16px; align-items: center; }
.cline .ico { width: 44px; height: 44px; border-radius: 999px; display: flex; align-items: center; justify-content: center; border: 1px solid var(--line-2); color: var(--glow); }
.cline small { display: block; font-size: 13px; color: var(--dim); }
.cline a, .cline button, .cline-txt { font-size: 17px; color: #fff; font-weight: 600; text-align: left; }
.cline a:hover, .cline button:hover { color: var(--orange); }
.form-card { border-radius: var(--r-card); border: 1px solid var(--line-2); background: rgba(11, 21, 48, 0.7); padding: 34px; }
@media (max-width: 639px) { .form-card { padding: 24px; } }
.field { display: grid; gap: 8px; margin-bottom: 20px; }
.field label { font-size: 14px; font-weight: 600; color: var(--ice); }
.field label .req { color: var(--orange); margin-left: 2px; }
.field input, .field textarea {
  width: 100%; border-radius: var(--r-input); border: 1px solid var(--line-2); background: rgba(5, 10, 24, 0.7);
  color: #fff; font: inherit; font-size: 15px; padding: 14px 16px; outline: none; transition: border-color .2s, box-shadow .2s;
}
.field textarea { min-height: 132px; resize: vertical; }
.field input::placeholder, .field textarea::placeholder { color: #8394b6; }
.field input:focus, .field textarea:focus { border-color: var(--glow); box-shadow: 0 0 0 3px rgba(91, 140, 255, 0.25); }
.field .err { font-size: 13px; color: #ff9b8a; min-height: 0; }
.field.invalid input, .field.invalid textarea { border-color: #ff7a66; }
.form-2 { display: grid; gap: 0 16px; }
@media (min-width: 640px) { .form-2 { grid-template-columns: 1fr 1fr; } }
.form-foot { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 14px; margin-top: 6px; }
.form-foot p { margin: 0; font-size: 13px; color: var(--dim); }
.hp { position: absolute; left: -9999px; }
.btn[disabled] { opacity: 0.6; pointer-events: none; }

/* ===== 页脚 ===== */
footer { border-top: 1px solid var(--line); padding: 56px 0 40px; background: rgba(3, 7, 17, 0.8); }
.foot-grid { display: grid; gap: 32px; }
@media (min-width: 900px) { .foot-grid { grid-template-columns: 1.4fr 1fr 1fr; } }
.foot-brand img { height: 30px; width: auto; }
.foot-brand p { margin: 16px 0 0; color: var(--muted); font-size: 15px; max-width: 30ch; }
.foot-col h4 { margin: 0 0 14px; font-size: 14px; color: #fff; }
.foot-col a { display: block; padding: 4px 0; font-size: 14px; color: var(--muted); }
.foot-col a:hover { color: #fff; }
.foot-bottom { margin-top: 44px; padding-top: 24px; border-top: 1px solid var(--line); display: flex; flex-wrap: wrap; justify-content: space-between; gap: 12px; font-size: 13px; color: var(--dim); }

/* ===== 弹窗 / 提示 ===== */
.modal { position: fixed; inset: 0; z-index: var(--z-modal); display: flex; align-items: center; justify-content: center; padding: 20px; background: rgba(2, 5, 13, 0.75); backdrop-filter: blur(6px); opacity: 0; pointer-events: none; transition: opacity .25s; }
.modal.open { opacity: 1; pointer-events: auto; }
.modal-panel { position: relative; width: 100%; max-width: 520px; max-height: 92vh; overflow-y: auto; border-radius: var(--r-card); border: 1px solid var(--line-2); background: var(--ink-2); padding: 34px; transform: translateY(12px) scale(0.98); transition: transform .35s var(--ease); }
.modal.open .modal-panel { transform: none; }
.modal-panel h3 { margin: 0; font-size: 22px; color: #fff; padding-right: 36px; }
.modal-panel > p { margin: 8px 0 24px; font-size: 14px; color: var(--muted); }
.modal-x { position: absolute; top: 20px; right: 20px; width: 36px; height: 36px; border-radius: 999px; display: flex; align-items: center; justify-content: center; border: 1px solid var(--line-2); }
.toast { position: fixed; left: 50%; bottom: 28px; z-index: var(--z-toast); transform: translate(-50%, 16px); opacity: 0; pointer-events: none; padding: 14px 22px; border-radius: 999px; background: var(--navy); border: 1px solid var(--line-2); font-size: 14px; color: #fff; transition: opacity .3s, transform .3s var(--ease); box-shadow: 0 20px 50px -20px rgba(0, 0, 0, 0.8); }
.toast.show { opacity: 1; transform: translate(-50%, 0); }

/* ===== 入场动效（JS 打上 .js 后才隐藏，保证无 JS 也能看） ===== */
@media (prefers-reduced-motion: no-preference) {
  .js .rv { opacity: 0; transform: translateY(28px); transition: opacity .9s var(--ease), transform .9s var(--ease); transition-delay: calc(var(--d, 0) * 90ms); }
  .js .rv.in { opacity: 1; transform: none; }
  .js .lat-bar i { transform: scaleX(0); transition: transform 1.4s var(--ease); }
  .js .in .lat-bar i { transform: scaleX(var(--w)); }
  .js .hero .h-in { opacity: 0; transform: translateY(24px); animation: hin 1s var(--ease) forwards; animation-delay: calc(var(--d, 0) * 110ms + 100ms); }
  .js .hero-visual { animation: hv 1.6s var(--ease) both; }
  @keyframes hin { to { opacity: 1; transform: none; } }
  @keyframes hv { from { opacity: 0; transform: scale(1.04); } to { opacity: 1; transform: none; } }
}
.lat-bar i { transform: scaleX(var(--w)); }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .marquee-track { animation: none; flex-wrap: wrap; justify-content: center; width: auto; }
  .marquee-track .dup { display: none; }
  .acc, .acc img, .tile, .btn { transition: none; }
}
@media (prefers-reduced-transparency: reduce) {
  .nav.scrolled, .btn-ghost, .modal { backdrop-filter: none; }
  .nav.scrolled { background: var(--ink); }
}

/* ===== 常见问题 ===== */
.faq-grid { display: grid; gap: 40px; }
@media (min-width: 1024px) { .faq-grid { grid-template-columns: 0.8fr 1.2fr; gap: 64px; } .faq-head { position: sticky; top: 110px; align-self: start; } }
.faq-head .h2 { margin-top: 18px; }
.faq-list { border-top: 1px solid var(--line); }
.faq { border-bottom: 1px solid var(--line); }
.faq summary {
  list-style: none; cursor: pointer; display: flex; align-items: center; justify-content: space-between; gap: 20px;
  padding: 22px 0; font-size: 18px; font-weight: 600; color: #fff;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
  content: ""; flex: none; width: 28px; height: 28px; border-radius: 999px; border: 1px solid var(--line-2);
  background:
    linear-gradient(currentColor, currentColor) center / 11px 1.5px no-repeat,
    linear-gradient(currentColor, currentColor) center / 1.5px 11px no-repeat;
  color: var(--muted); transition: transform 0.3s ease, background-color 0.3s ease, color 0.3s ease;
}
.faq[open] summary::after { transform: rotate(45deg); color: var(--orange); border-color: rgba(242, 140, 40, 0.5); }
.faq summary:hover { color: #dbe4f7; }
.faq summary:focus-visible { outline: 2px solid var(--orange); outline-offset: 4px; border-radius: 8px; }
.faq p { margin: 0; padding: 0 48px 24px 0; color: var(--muted); font-size: 16px; line-height: 1.8; max-width: 70ch; }