/* ============================================================
   Nova AI · 首页「深色科技版」样式
   仅 index.html 引用（其他页面仍用 style.css，互不影响）
   配色：深空底 #04070F + 天蓝 #38BDF8 + 电青 #22D3EE + 金 #D4A574
   ============================================================ */
:root {
  --bg: #04070F;
  --bg-2: #070C1A;
  --bg-3: #0A1224;
  --panel: rgba(11, 20, 38, 0.66);
  --panel-solid: rgba(10, 18, 34, 0.92);
  --line: rgba(90, 150, 240, 0.16);
  --line-2: rgba(90, 150, 240, 0.34);
  --txt: #E8F0FA;
  --muted: #8FA4C0;
  --dim: #5F7391;
  --cyan: #22D3EE;
  --brand: #38BDF8;
  --blue: #2563EB;
  --deep: #1E3A5F;
  --gold: #E0B87F;
  --gold-2: #D4A574;
  --max: 1180px;
  --r: 14px;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", Roboto, Helvetica, Arial, sans-serif;
  --mono: ui-monospace, "SF Mono", Menlo, Consolas, "Roboto Mono", monospace;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body.page-home {
  background: var(--bg);
  color: var(--txt);
  font-family: var(--font);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}
body.page-home a { color: inherit; text-decoration: none; transition: color .2s, opacity .2s; }
body.page-home img { max-width: 100%; display: block; }
h1, h2, h3, h4 { margin: 0; letter-spacing: -0.01em; line-height: 1.22; }
p { margin: 0; }
ul { margin: 0; }
section[id] { scroll-margin-top: 84px; }

.container { max-width: var(--max); margin: 0 auto; padding: 0 22px; }

/* ================= 顶部导航 ================= */
.nav {
  position: sticky; top: 0; z-index: 200;
  background: rgba(4, 7, 15, 0.72);
  backdrop-filter: saturate(180%) blur(14px);
  -webkit-backdrop-filter: saturate(180%) blur(14px);
  border-bottom: 1px solid transparent;
  transition: background .3s, border-color .3s;
}
.nav.scrolled { background: rgba(4, 7, 15, 0.94); border-bottom-color: var(--line); }
.nav-inner {
  max-width: var(--max); margin: 0 auto; padding: 0 22px; height: 66px;
  display: flex; align-items: center; justify-content: space-between; gap: 18px;
}
.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 17px; flex: 0 0 auto; }
.brand-mark {
  width: 30px; height: 30px; border-radius: 9px; position: relative;
  background: linear-gradient(135deg, #38BDF8 0%, #1E3A5F 100%);
  box-shadow: 0 0 0 1px rgba(56, 189, 248, .35), 0 6px 20px rgba(56, 189, 248, .35);
}
.brand-mark::after {
  content: ""; position: absolute; inset: 6px; border: 2px solid #fff; border-radius: 50%;
  border-top-color: transparent; border-right-color: transparent; transform: rotate(-15deg); opacity: .92;
}
.nav-links { display: flex; align-items: center; gap: 25px; }
.nav-links a { font-size: 14px; color: var(--muted); font-weight: 500; }
.nav-links a:hover { color: #fff; }
.nav-links a.nav-hl {
  color: #2A1D08; font-weight: 800; padding: 7px 15px; border-radius: 999px;
  background: linear-gradient(135deg, #F2D9B0, #D4A574);
  box-shadow: 0 4px 14px rgba(212, 165, 116, .38);
}
.nav-links a.nav-hl:hover { color: #2A1D08; filter: brightness(1.05); transform: translateY(-1px); }
.nav-cta {
  display: inline-flex; align-items: center; gap: 6px; flex: 0 0 auto;
  padding: 9px 17px; border-radius: 9px; font-size: 14px; font-weight: 700;
  color: #04121F !important;
  background: linear-gradient(135deg, #58CBFB, #2563EB);
  box-shadow: 0 6px 20px rgba(56, 189, 248, .32);
  transition: transform .2s, box-shadow .2s;
}
.nav-cta:hover { transform: translateY(-1px); box-shadow: 0 10px 26px rgba(56, 189, 248, .45); }
.nav-burger {
  display: none; width: 40px; height: 40px; border-radius: 10px; cursor: pointer;
  border: 1px solid var(--line-2); background: rgba(255, 255, 255, .05); color: #fff;
}
.nav-burger svg { display: block; }

/* ================= Hero ================= */
.hero {
  position: relative; overflow: hidden; padding: 88px 0 104px;
  background:
    radial-gradient(900px 520px at 16% -12%, rgba(37, 99, 235, .32), transparent 62%),
    radial-gradient(720px 460px at 88% 6%, rgba(34, 211, 238, .16), transparent 60%),
    linear-gradient(180deg, #04070F 0%, #060B16 55%, #04070F 100%);
}
#fx { position: absolute; inset: 0; width: 100%; height: 100%; display: block; opacity: .9; }
.hero-glow {
  position: absolute; left: 50%; top: 42%; width: 620px; height: 620px; margin: -310px 0 0 -310px;
  background: radial-gradient(circle, rgba(56, 189, 248, .16), transparent 68%); pointer-events: none;
}
.grid-floor {
  position: absolute; left: -25%; right: -25%; bottom: -4px; height: 320px; pointer-events: none;
  background-image:
    linear-gradient(rgba(56, 189, 248, .22) 1px, transparent 1px),
    linear-gradient(90deg, rgba(56, 189, 248, .22) 1px, transparent 1px);
  background-size: 62px 62px;
  transform: perspective(360px) rotateX(66deg); transform-origin: bottom center;
  animation: gridmove 5.5s linear infinite;
  -webkit-mask-image: linear-gradient(to top, #000 0%, transparent 76%);
  mask-image: linear-gradient(to top, #000 0%, transparent 76%);
}
@keyframes gridmove { to { background-position: 0 62px, 62px 0; } }

.hero-grid {
  position: relative; z-index: 3; max-width: var(--max); margin: 0 auto; padding: 0 22px;
  display: grid; grid-template-columns: 1.06fr .94fr; gap: 54px; align-items: center;
}
.hero-tag {
  display: inline-flex; align-items: center; gap: 9px; font-size: 13px; font-weight: 600; color: #BFE4F5;
  padding: 8px 15px; border-radius: 999px; border: 1px solid var(--line-2);
  background: rgba(34, 211, 238, .07);
}
.hero-tag .dot {
  width: 7px; height: 7px; border-radius: 50%; background: var(--cyan);
  box-shadow: 0 0 10px var(--cyan); animation: blink 1.8s ease-in-out infinite;
}
@keyframes blink { 0%, 100% { opacity: 1; } 50% { opacity: .28; } }
.hero h1 {
  font-size: clamp(30px, 4.6vw, 52px); margin: 22px 0 0; font-weight: 800; color: #fff;
}
.hero h1 .accent {
  background: linear-gradient(100deg, #38BDF8 0%, #67E8F9 45%, #E0B87F 100%);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.hero-sub { font-size: clamp(16px, 2vw, 19px); color: #C4D6EA; margin-top: 18px; font-weight: 500; }
.hero-desc { font-size: 14.8px; color: var(--muted); margin-top: 14px; max-width: 560px; }
.hero-cta { display: flex; gap: 13px; margin-top: 30px; flex-wrap: wrap; }
.hero-trust { display: grid; grid-template-columns: 1fr 1fr; gap: 11px 20px; margin-top: 32px; max-width: 520px; }
.hero-trust-item { display: flex; align-items: center; gap: 9px; font-size: 13.5px; color: #A9BED6; }
.check {
  flex: 0 0 auto; width: 19px; height: 19px; border-radius: 50%; display: grid; place-items: center;
  font-size: 11px; font-weight: 700; color: #04121F;
  background: linear-gradient(135deg, #67E8F9, #38BDF8); box-shadow: 0 0 12px rgba(56, 189, 248, .5);
}

/* ---- 星系图谱 · Hero ---- */
.hero-visual { position: relative; min-height: 500px; }
#heroGalaxy { position: absolute; inset: 0; width: 100%; height: 100%; display: block; }
.hero-core-badge {
  position: absolute; left: 50%; bottom: 4px; transform: translateX(-50%);
  display: inline-flex; align-items: center; gap: 8px; z-index: 4; white-space: nowrap;
  padding: 7px 14px; border-radius: 999px; font: 600 11.5px/1 var(--mono); letter-spacing: .1em;
  color: #CDE7F7; background: var(--panel-solid); border: 1px solid var(--line-2);
  box-shadow: 0 10px 28px rgba(2, 6, 16, .7); backdrop-filter: blur(8px);
}
.g-live {
  width: 8px; height: 8px; border-radius: 50%; flex: 0 0 auto;
  background: #5BF0A8; box-shadow: 0 0 10px #5BF0A8; animation: blink 1.8s ease-in-out infinite;
}

/* ---- 星系图谱 · 实况面板 ---- */
.galaxy-panel {
  position: relative; overflow: hidden; min-height: 540px;
  border-radius: 18px; border: 1px solid var(--line-2);
  background:
    radial-gradient(120% 130% at 50% 42%, #08152B 0%, #050B18 52%, #03060E 100%);
  box-shadow: 0 30px 90px rgba(2, 6, 16, .82), inset 0 0 0 1px rgba(56, 189, 248, .06);
}
#galaxyView { position: absolute; inset: 0; width: 100%; height: 100%; display: block; }
.galaxy-panel .g-title,
.galaxy-panel .g-stats,
.galaxy-panel .g-log,
.galaxy-panel .g-legend { pointer-events: none; }

.g-title {
  position: absolute; top: 16px; left: 16px; z-index: 3;
  display: flex; align-items: center; gap: 10px; padding: 10px 15px;
  border-radius: 12px; background: rgba(6, 14, 28, .72); border: 1px solid var(--line);
  backdrop-filter: blur(8px);
}
.g-title b { display: block; font-size: 13.5px; color: #E8F2FB; letter-spacing: .02em; }
.g-title i { display: block; font: 600 10px/1 var(--mono); color: var(--dim); letter-spacing: .14em; font-style: normal; margin-top: 4px; }

.g-stats { position: absolute; top: 16px; right: 16px; z-index: 3; display: flex; gap: 8px; }
.g-stat {
  min-width: 76px; text-align: center; padding: 9px 13px; border-radius: 11px;
  background: rgba(6, 14, 28, .72); border: 1px solid var(--line); backdrop-filter: blur(8px);
  transition: border-color .3s;
}
.g-stat b { display: block; font: 800 18px/1 var(--mono); color: #EAF4FF; }
.g-stat span { display: block; font-size: 11px; color: var(--dim); margin-top: 5px; }
.g-stat.hot { border-color: rgba(56, 189, 248, .55); }

.g-log, .g-legend {
  position: absolute; bottom: 16px; z-index: 3; padding: 13px 15px; border-radius: 12px;
  background: rgba(6, 14, 28, .74); border: 1px solid var(--line); backdrop-filter: blur(8px);
}
.g-log { left: 16px; width: 288px; }
.g-legend { right: 16px; }
.g-log h5, .g-legend h5 {
  margin: 0 0 9px; font: 700 10.5px/1 var(--mono); letter-spacing: .16em;
  text-transform: uppercase; color: var(--dim);
}
.g-log ul, .g-legend ul { list-style: none; margin: 0; padding: 0; }
.g-log li {
  display: flex; align-items: center; gap: 9px; padding: 4px 0;
  font: 600 11.5px/1 var(--mono); color: #A9BED6;
}
.g-log li .d { width: 6px; height: 6px; border-radius: 50%; flex: 0 0 auto; }
.g-log li .tm { color: var(--dim); }
.g-log li .ok { margin-left: auto; color: #5BF0A8; font-weight: 700; }
.g-log li.fresh { animation: logIn .5s ease; }
@keyframes logIn { from { opacity: 0; transform: translateX(-8px); } to { opacity: 1; transform: none; } }
.g-legend li { display: flex; align-items: center; gap: 9px; padding: 3.5px 0; font-size: 11.5px; color: #A9BED6; }
.g-legend li i { width: 8px; height: 8px; border-radius: 50%; flex: 0 0 auto; }

/* ================= 通用区块 ================= */
.section { position: relative; padding: 86px 0; }
.section-soft { background: linear-gradient(180deg, transparent, rgba(10, 18, 36, .6) 20%, rgba(10, 18, 36, .6) 80%, transparent); }
.section-head { text-align: center; max-width: 780px; margin: 0 auto 46px; }
.eyebrow {
  display: inline-block; font: 700 11.5px/1 var(--mono); letter-spacing: .22em; text-transform: uppercase;
  color: var(--cyan); padding: 7px 14px; border: 1px solid var(--line-2); border-radius: 999px;
  background: rgba(34, 211, 238, .06);
}
.section-head h2 {
  font-size: clamp(26px, 3.4vw, 38px); margin: 16px 0 10px; font-weight: 800;
  background: linear-gradient(180deg, #FFFFFF, #A9C7E8);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.section-head p { color: var(--muted); font-size: 15.5px; }

.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }

/* ---- 玻璃卡 ---- */
.card {
  position: relative; padding: 24px; border-radius: var(--r); overflow: hidden;
  background: var(--panel); border: 1px solid var(--line); backdrop-filter: blur(10px);
  transition: transform .28s, border-color .28s, box-shadow .28s;
}
.card::before {
  content: ""; position: absolute; top: 0; left: 0; right: 0; height: 1px; opacity: .55;
  background: linear-gradient(90deg, transparent, rgba(56, 189, 248, .8), transparent);
}
.card:hover {
  transform: translateY(-5px); border-color: var(--line-2);
  box-shadow: 0 20px 48px rgba(2, 8, 22, .72), 0 0 0 1px rgba(56, 189, 248, .16);
}
.card h3 { font-size: 17.5px; margin-bottom: 8px; font-weight: 700; color: #fff; }
.card > p { color: var(--muted); font-size: 14.5px; }
.card ul { list-style: none; padding: 0; margin-top: 14px; }
.card li { position: relative; padding-left: 19px; font-size: 13.8px; color: #B9CCE2; margin-top: 8px; }
.card li::before {
  content: ""; position: absolute; left: 1px; top: 8px; width: 6px; height: 6px; border-radius: 50%;
  background: var(--cyan); box-shadow: 0 0 9px var(--cyan);
}
.adv-icon {
  width: 44px; height: 44px; border-radius: 11px; display: grid; place-items: center;
  font-size: 20px; margin-bottom: 14px;
  background: rgba(56, 189, 248, .1); border: 1px solid var(--line-2);
}

/* ---- 对比 ---- */
.cmp-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; }
.cmp { padding: 22px; border-radius: var(--r); background: var(--panel); border: 1px solid var(--line); }
.cmp .dim {
  font: 700 12px/1 var(--mono); letter-spacing: .16em; text-transform: uppercase;
  color: var(--dim); margin-bottom: 14px;
}
.cmp .row {
  display: flex; gap: 10px; align-items: flex-start; font-size: 14.2px;
  padding: 11px 13px; border-radius: 10px; margin-top: 9px;
}
.cmp .row .mk { flex: 0 0 auto; font-weight: 800; font-size: 13px; line-height: 1.5; }
.cmp .row b { color: #fff; font-weight: 700; }
.cmp .old { background: rgba(248, 113, 113, .06); border: 1px solid rgba(248, 113, 113, .16); color: #9FB0C6; }
.cmp .old .mk { color: #F87171; }
.cmp .new { background: rgba(34, 211, 238, .08); border: 1px solid rgba(34, 211, 238, .26); color: #DFF4FB; }
.cmp .new .mk { color: var(--cyan); }

/* ---- 三步 ---- */
.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.step-num {
  font: 800 42px/1 var(--mono);
  background: linear-gradient(180deg, #38BDF8, rgba(56, 189, 248, .12));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.step h3 { font-size: 17.5px; margin: 12px 0 8px; color: #fff; }
.step p { color: var(--muted); font-size: 14.2px; }
.step p b { color: #D7E8F7; }
.step p a { color: var(--brand); text-decoration: underline; text-underline-offset: 3px; }
.steps-cta { display: flex; gap: 13px; justify-content: center; margin-top: 34px; flex-wrap: wrap; }

/* ---- 终端 / 聊天面板 ---- */
.term-wrap { position: relative; max-width: 720px; margin: 0 auto; }
.term {
  position: relative; border-radius: 16px; overflow: hidden;
  border: 1px solid var(--line-2);
  background: linear-gradient(180deg, rgba(9, 16, 32, .94), rgba(6, 11, 22, .97));
  box-shadow: 0 30px 80px rgba(2, 6, 16, .82);
}
.term-bar {
  display: flex; align-items: center; gap: 12px; padding: 12px 16px;
  border-bottom: 1px solid var(--line); background: rgba(255, 255, 255, .02);
}
.term-dots { display: flex; gap: 6px; }
.term-dots i { width: 10px; height: 10px; border-radius: 50%; background: #26374F; }
.term-dots i:first-child { background: #F87171; }
.term-dots i:nth-child(2) { background: #FBBF24; }
.term-dots i:nth-child(3) { background: #34D399; }
.term-title { font: 600 12.5px/1 var(--mono); color: var(--muted); }
.term-title b { color: var(--brand); }
.term-body { padding: 20px 18px 22px; }
.term-foot {
  padding: 11px 16px; border-top: 1px solid var(--line);
  font: 500 11.5px/1 var(--mono); color: var(--dim); display: flex; gap: 10px; flex-wrap: wrap;
}
.bubble { max-width: 80%; padding: 11px 14px; border-radius: 13px; font-size: 14.2px; margin-top: 11px; }
.bubble-user {
  margin-left: auto; color: #EAF4FF; border-bottom-right-radius: 4px;
  background: linear-gradient(135deg, #2563EB, #1D4ED8);
  box-shadow: 0 8px 24px rgba(37, 99, 235, .3);
}
.bubble-nova {
  color: #DCE9F7; border: 1px solid var(--line); border-bottom-left-radius: 4px;
  background: rgba(255, 255, 255, .05);
}
.bubble-nova strong { color: var(--brand); }
.scan {
  position: absolute; inset: 0; pointer-events: none; opacity: .5;
  background: repeating-linear-gradient(180deg, rgba(255, 255, 255, .035) 0 1px, transparent 1px 4px);
}
.demo-note { text-align: center; color: var(--dim); font-size: 13px; margin-top: 18px; }

/* ---- 数字 ---- */
.roi { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.roi-cell { text-align: center; padding: 28px 14px; border-radius: var(--r); background: var(--panel); border: 1px solid var(--line); }
.roi-num {
  font: 800 42px/1 var(--mono);
  background: linear-gradient(180deg, #FFFFFF, #38BDF8);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.roi-label { margin-top: 11px; font-size: 13px; color: var(--muted); }

/* ---- 渠道 ---- */
.channels { display: grid; grid-template-columns: repeat(5, 1fr); gap: 14px; }
.channel {
  text-align: center; padding: 22px 14px; border-radius: var(--r);
  background: var(--panel); border: 1px solid var(--line); transition: transform .28s, border-color .28s;
}
.channel:hover { transform: translateY(-4px); border-color: var(--line-2); }
.channel-icon { font-size: 24px; }
.channel-name { font-size: 15px; font-weight: 700; color: #fff; margin-top: 10px; }
.channel-desc { font-size: 12.5px; color: var(--dim); margin-top: 4px; }
.status {
  display: inline-flex; align-items: center; gap: 6px; margin-top: 13px;
  font: 700 11px/1 var(--mono); padding: 5px 10px; border-radius: 999px;
}
.status::before { content: ""; width: 6px; height: 6px; border-radius: 50%; background: currentColor; box-shadow: 0 0 8px currentColor; }
.status-live { color: #5BF0A8; background: rgba(34, 197, 94, .1); border: 1px solid rgba(34, 197, 94, .28); }
.status-beta { color: #FFD08A; background: rgba(250, 204, 21, .1); border: 1px solid rgba(250, 204, 21, .28); }
.status-plan { color: #A9BBD4; background: rgba(148, 163, 184, .1); border: 1px solid rgba(148, 163, 184, .26); }
.privacy-note { text-align: center; color: var(--dim); font-size: 13px; margin-top: 22px; }

/* ---- CTA ---- */
.cta {
  position: relative; text-align: center; padding: 58px 30px; border-radius: 22px; overflow: hidden;
  border: 1px solid var(--line-2);
  background:
    radial-gradient(620px 260px at 50% -10%, rgba(56, 189, 248, .24), transparent 70%),
    linear-gradient(180deg, rgba(11, 22, 44, .92), rgba(6, 11, 22, .96));
}
.cta h2 { font-size: clamp(24px, 3.2vw, 34px); font-weight: 800; color: #fff; }
.cta p { color: var(--muted); margin-top: 12px; font-size: 15px; max-width: 620px; margin-left: auto; margin-right: auto; }
.cta-actions { display: flex; gap: 13px; justify-content: center; margin-top: 26px; flex-wrap: wrap; }

/* ---- 按钮 ---- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 13px 25px; border-radius: 11px; font-size: 15px; font-weight: 700;
  cursor: pointer; border: 1px solid transparent; transition: transform .22s, box-shadow .22s, background .22s, border-color .22s;
}
.btn-primary {
  color: #04121F;
  background: linear-gradient(135deg, #5ED0FB, #2563EB);
  box-shadow: 0 10px 28px rgba(56, 189, 248, .34), inset 0 1px 0 rgba(255, 255, 255, .4);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 16px 38px rgba(56, 189, 248, .48); }
.btn-ghost { background: rgba(255, 255, 255, .04); border-color: var(--line-2); color: var(--txt); }
.btn-ghost:hover { background: rgba(56, 189, 248, .1); border-color: var(--brand); }
.btn-outline { background: transparent; border-color: var(--line-2); color: var(--txt); }
.btn-outline:hover { border-color: var(--brand); background: rgba(56, 189, 248, .08); }

/* ---- 页脚 ---- */
.footer { margin-top: 24px; padding: 56px 0 26px; border-top: 1px solid var(--line); background: #03060C; }
.footer-grid { display: grid; grid-template-columns: 1.6fr 1fr 1fr 1.25fr; gap: 30px; }
.footer-brand { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 17px; color: #fff; }
.footer-brand .brand-mark { width: 28px; height: 28px; }
.footer-grid > div > p { color: var(--dim); font-size: 13.5px; margin-top: 12px; }
.footer h4 {
  font: 700 11.5px/1 var(--mono); letter-spacing: .16em; text-transform: uppercase;
  color: var(--dim); margin-bottom: 14px;
}
.footer-links { list-style: none; padding: 0; }
.footer-links li { margin-bottom: 9px; }
.footer-links a { color: var(--muted); font-size: 14px; }
.footer-links a:hover { color: #fff; }
.footer-bottom {
  display: flex; justify-content: space-between; gap: 14px; flex-wrap: wrap;
  margin-top: 36px; padding-top: 20px; border-top: 1px solid var(--line);
  color: var(--dim); font-size: 13px;
}
.footer-bottom a { color: var(--muted); }

/* ---- 入场动画 ----
   注意：初始隐藏态挂在 html.anim 下，由内联脚本注入；
   若 JS 未执行则不隐藏，内容始终可见（防"整页隐身"） */
.reveal { transition: opacity .7s cubic-bezier(.2, .7, .2, 1), transform .7s cubic-bezier(.2, .7, .2, 1); }
.anim .reveal { opacity: 0; transform: translateY(24px); }
.anim .reveal.in { opacity: 1; transform: none; }

/* ================= 响应式 ================= */
@media (max-width: 1024px) {
  .hero-grid { grid-template-columns: 1fr; gap: 44px; }
  .hero-visual { order: -1; min-height: 420px; }
  .galaxy-panel { min-height: 480px; }
  .channels { grid-template-columns: repeat(3, 1fr); }
}
@media (max-width: 900px) {
  .grid-3, .steps, .grid-2, .cmp-grid { grid-template-columns: 1fr; }
  .roi { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .section { padding: 68px 0; }
  .nav-links { gap: 16px; }
  .nav-links a { font-size: 13.5px; }
  .nav-cta { padding: 8px 14px; font-size: 13.5px; }
}
@media (max-width: 768px) {
  .nav-burger { display: grid; place-items: center; }
  .nav-cta { display: none; }
  .nav-links {
    position: absolute; top: 66px; left: 0; right: 0; display: none;
    flex-direction: column; align-items: stretch; gap: 0;
    padding: 8px 22px 18px; background: #04070F;
    border-bottom: 1px solid var(--line);
  }
  .nav-links.open { display: flex; }
  .nav-links a { padding: 14px 0; font-size: 15px; border-bottom: 1px solid rgba(90, 150, 240, .1); }
  .nav-links a.nav-hl {
    display: inline-flex; justify-content: center; margin-top: 14px; border-bottom: none; padding: 11px 15px;
  }
  .hero { padding: 60px 0 78px; }
  .hero-trust { grid-template-columns: 1fr; max-width: none; }
  .hero-visual { min-height: 340px; }
  .galaxy-panel { min-height: 420px; }
  .g-stats { gap: 6px; }
  .g-stat { min-width: 62px; padding: 7px 9px; border-radius: 9px; }
  .g-stat b { font-size: 15px; }
  .g-stat span { font-size: 10px; }
  .g-log { width: 232px; }
  .channels { grid-template-columns: repeat(2, 1fr); }
  .cta { padding: 42px 20px; }
}
@media (max-width: 640px) {
  .g-log, .g-legend { display: none; }
  .g-title { padding: 8px 12px; }
  .g-title b { font-size: 12px; }
  .g-title i { font-size: 9px; letter-spacing: .1em; }
  .galaxy-panel { min-height: 400px; }
  /* 统计条挪到底部，避免和标题抢位置 */
  .g-stats {
    top: auto; bottom: 14px; left: 14px; right: 14px; gap: 6px;
  }
  .g-stat { flex: 1; min-width: 0; padding: 7px 4px; border-radius: 9px; }
  .g-stat b { font-size: 15px; }
  .g-stat span { font-size: 9.5px; margin-top: 4px; }
}
@media (max-width: 520px) {
  .roi { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .btn { width: 100%; }
  .hero-cta .btn, .steps-cta .btn, .cta-actions .btn { width: 100%; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
  .anim .reveal, .reveal { opacity: 1 !important; transform: none !important; }
}