/* ============================================================
   无枷机车官网 · 夜航仪表 Night-Cockpit 设计系统
   苏州无枷智能科技有限公司 · © 2026
   纯静态 · 无外链依赖 · 断点 1080 / 768
   ============================================================ */

/* ---------- tokens ---------- */
:root {
  --bg-0: #000000;
  --bg-1: #0a0d12;
  --bg-2: #10141c;
  --card: rgba(255, 255, 255, .028);
  --card-hi: rgba(255, 255, 255, .055);
  --line: rgba(255, 255, 255, .09);
  --line-hi: rgba(255, 255, 255, .18);

  --txt: #f4f7fb;
  --txt-2: #a9b4c2;
  --txt-3: #67727f;

  --blue: #0076BA;
  --teal: #05A89D;
  --blue-l: #45a9ea;   /* 深底上的可读蓝 */
  --teal-l: #37d6c8;   /* 深底上的可读青 */

  --grad: linear-gradient(96deg, #0076BA 10%, #05A89D 90%);
  --grad-soft: linear-gradient(96deg, rgba(0,118,186,.16), rgba(5,168,157,.16));

  --warn: #ffb02e;
  --danger: #ff5d5d;

  --sans: -apple-system, BlinkMacSystemFont, "PingFang SC", "HarmonyOS Sans SC",
    "MiSans", "Noto Sans SC", "Helvetica Neue", "Microsoft YaHei", sans-serif;
  --mono: ui-monospace, "SF Mono", SFMono-Regular, Menlo, Consolas,
    "Liberation Mono", monospace;

  --nav-h: 68px;
  --radius: 14px;
  --shadow-glow: 0 18px 50px -18px rgba(0, 118, 186, .45);
}

/* ---------- reset ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--nav-h) + 16px);
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--sans);
  background: var(--bg-0);
  color: var(--txt);
  line-height: 1.75;
  font-size: 16px;
  letter-spacing: .01em;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }
button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; }

::selection { background: rgba(5, 168, 157, .35); color: #fff; }

:focus-visible {
  outline: 2px solid var(--teal-l);
  outline-offset: 3px;
  border-radius: 4px;
}

[id] { scroll-margin-top: calc(var(--nav-h) + 24px); }

/* ---------- utilities ---------- */
.container {
  width: min(1200px, 100% - 48px);
  margin-inline: auto;
}

.mono { font-family: var(--mono); }

.grad-text {
  background: linear-gradient(94deg, var(--blue-l), var(--teal-l));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.section {
  position: relative;
  padding-block: clamp(76px, 9vw, 128px);
}

.section--tint {
  background:
    radial-gradient(1200px 500px at 85% 0%, rgba(0, 118, 186, .08), transparent 60%),
    linear-gradient(180deg, var(--bg-0), var(--bg-1) 18%, var(--bg-1) 82%, var(--bg-0));
}

/* 速度线：贯穿全站的蓝→青分隔光带 */
.speedline {
  height: 1px;
  border: 0;
  background: linear-gradient(90deg, transparent, rgba(0, 118, 186, .55) 18%,
    rgba(5, 168, 157, .55) 82%, transparent);
  margin: 0;
}

/* 段落编号幽灵数字 */
.sec-num {
  position: absolute;
  top: clamp(18px, 3vw, 40px);
  right: max(24px, calc((100vw - 1200px) / 2));
  font-family: var(--mono);
  font-size: clamp(88px, 12vw, 168px);
  font-weight: 700;
  line-height: 1;
  color: transparent;
  -webkit-text-stroke: 1px rgba(255, 255, 255, .09);
  pointer-events: none;
  user-select: none;
}

/* ---------- 段落标题 ---------- */
.sec-head { max-width: 780px; margin-bottom: clamp(40px, 5vw, 64px); }

.kicker {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .22em;
  color: var(--teal-l);
  text-transform: uppercase;
  margin-bottom: 18px;
}

.kicker::before {
  content: "";
  width: 26px;
  height: 1px;
  background: var(--grad);
}

.sec-head h2 {
  font-size: clamp(28px, 4vw, 44px);
  font-weight: 700;
  line-height: 1.28;
  letter-spacing: .015em;
  margin-bottom: 16px;
}

.sec-head .lede {
  color: var(--txt-2);
  font-size: clamp(15px, 1.4vw, 17.5px);
  max-width: 640px;
}

.sec-head--center { margin-inline: auto; text-align: center; }
.sec-head--center .kicker { justify-content: center; }
.sec-head--center::before { margin-inline: auto; }
.sec-head--center .lede { margin-inline: auto; }

/* ---------- buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 13px 30px;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 600;
  letter-spacing: .06em;
  line-height: 1.4;
  border: 1px solid transparent;
  transition: transform .25s ease, box-shadow .25s ease, background .25s ease,
    border-color .25s ease, color .25s ease;
  white-space: nowrap;
}

.btn-primary {
  background: var(--grad);
  color: #fff;
  box-shadow: 0 10px 32px -12px rgba(5, 168, 157, .55);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 16px 40px -12px rgba(5, 168, 157, .7);
}

.btn-ghost {
  border-color: var(--line-hi);
  color: var(--txt);
  background: rgba(255, 255, 255, .02);
}
.btn-ghost:hover {
  border-color: rgba(55, 214, 200, .6);
  background: rgba(255, 255, 255, .06);
  transform: translateY(-2px);
}

.btn-sm { padding: 8px 20px; font-size: 13.5px; }

.btn .arr { transition: transform .25s ease; }
.btn:hover .arr { transform: translateX(4px); }

/* ---------- navbar ---------- */
.nav {
  position: fixed;
  inset: 0 0 auto;
  height: var(--nav-h);
  z-index: 100;
  background: rgba(6, 9, 13, .55);
  -webkit-backdrop-filter: blur(18px) saturate(1.3);
  backdrop-filter: blur(18px) saturate(1.3);
  border-bottom: 1px solid rgba(255, 255, 255, .06);
  transition: background .3s ease, border-color .3s ease;
}

.nav.scrolled {
  background: rgba(4, 6, 10, .82);
  border-bottom-color: var(--line);
}

.nav-inner {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand { display: inline-flex; align-items: center; gap: 11px; flex-shrink: 0; }

.brand-mark { width: 32px; height: 32px; }

.brand-text { display: flex; flex-direction: column; line-height: 1.15; }
.brand-cn { font-size: 17px; font-weight: 700; letter-spacing: .12em; }
.brand-en {
  font-family: var(--mono);
  font-size: 9.5px;
  letter-spacing: .34em;
  color: var(--txt-3);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 6px;
}

.nav-links > a:not(.nav-cta) {
  position: relative;
  padding: 9px 13px;
  font-size: 14.5px;
  color: var(--txt-2);
  transition: color .25s ease;
}

.nav-links > a:not(.nav-cta)::after {
  content: "";
  position: absolute;
  left: 13px;
  right: 13px;
  bottom: 3px;
  height: 2px;
  border-radius: 2px;
  background: var(--grad);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .28s ease;
}

.nav-links > a:not(.nav-cta):hover { color: var(--txt); }
.nav-links > a:not(.nav-cta):hover::after,
.nav-links > a.active::after { transform: scaleX(1); }

.nav-links > a.active { color: var(--txt); }

.nav-cta { margin-left: 10px; }

.nav-toggle {
  display: none;
  width: 42px;
  height: 42px;
  position: relative;
  z-index: 110;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 6px;
}

.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  border-radius: 2px;
  background: var(--txt);
  transition: transform .3s ease, opacity .3s ease;
}

.nav-toggle[aria-expanded="true"] span:first-child { transform: translateY(4px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:last-child { transform: translateY(-4px) rotate(-45deg); }

/* ---------- hero ---------- */
.hero {
  position: relative;
  min-height: 100vh;
  min-height: 100svh;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  isolation: isolate;
}

.hero-bg {
  position: absolute;
  inset: -8% 0;
  z-index: -2;
  background: url(../assets/hero-bg.webp) center 35% / cover no-repeat;
  will-change: transform;
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(900px 620px at 24% 42%, rgba(0, 0, 0, .58), transparent 68%),
    linear-gradient(180deg, rgba(0, 0, 0, .58) 0%, rgba(0, 0, 0, .22) 42%, rgba(0, 0, 0, .8) 88%, #000 100%);
}

.hero::after {  /* 颗粒 + 青色气氛 */
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background:
    radial-gradient(1100px 420px at 78% 88%, rgba(5, 168, 157, .12), transparent 62%),
    url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='140' height='140'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2'/%3E%3C/filter%3E%3Crect width='140' height='140' filter='url(%23n)' opacity='0.05'/%3E%3C/svg%3E");
}

.hero-main {
  flex: 1;
  display: flex;
  align-items: center;
  padding-top: calc(var(--nav-h) + 24px);
}

.hero-kicker {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-family: var(--mono);
  font-size: 12.5px;
  letter-spacing: .3em;
  color: var(--teal-l);
  margin-bottom: 26px;
}

.hero-kicker::before {
  content: "";
  width: 34px;
  height: 1px;
  background: var(--grad);
}

.hero h1 {
  font-size: clamp(38px, 6.6vw, 76px);
  font-weight: 700;
  line-height: 1.14;
  letter-spacing: .01em;
  max-width: 15ch;
  text-shadow: 0 6px 40px rgba(0, 0, 0, .55);
}

.hero-sub {
  margin-top: 22px;
  font-size: clamp(16px, 1.8vw, 20px);
  color: rgba(244, 247, 251, .88);
  letter-spacing: .05em;
  max-width: 40ch;
  text-shadow: 0 2px 20px rgba(0, 0, 0, .6);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-top: 40px;
}

/* hero 底部四阶段进度导览 */
.stage-rail {
  position: relative;
  border-top: 1px solid rgba(255, 255, 255, .12);
  background: rgba(3, 5, 8, .55);
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
}

.stage-rail-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
}

.stage-rail a {
  position: relative;
  display: block;
  padding: 20px 22px 22px;
  border-left: 1px solid rgba(255, 255, 255, .09);
  transition: background .3s ease;
}

.stage-rail a:first-child { border-left: 0; }

.stage-rail a::before {  /* 顶部进度光带 */
  content: "";
  position: absolute;
  top: -1px;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--grad);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .35s ease;
}

.stage-rail a:hover { background: rgba(255, 255, 255, .045); }
.stage-rail a:hover::before { transform: scaleX(1); }

.stage-lv {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .26em;
  color: var(--txt-3);
  transition: color .3s ease;
}

.stage-rail a:hover .stage-lv { color: var(--teal-l); }

.stage-name {
  display: block;
  margin-top: 5px;
  font-size: clamp(15px, 1.5vw, 17.5px);
  font-weight: 600;
  color: var(--txt);
}

.stage-sub {
  display: block;
  margin-top: 3px;
  font-size: 12.5px;
  color: var(--txt-3);
}

/* ---------- 子页 hero ---------- */
.page-hero {
  position: relative;
  padding: calc(var(--nav-h) + clamp(72px, 10vw, 120px)) 0 clamp(56px, 7vw, 88px);
  overflow: hidden;
  isolation: isolate;
  border-bottom: 1px solid var(--line);
}

.page-hero .ph-bg {
  position: absolute;
  inset: 0;
  z-index: -2;
  background-size: cover;
  background-position: center;
  filter: saturate(1.05);
}

.page-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(760px 420px at 22% 38%, rgba(0, 0, 0, .62), transparent 70%),
    linear-gradient(180deg, rgba(0, 0, 0, .66), rgba(0, 0, 0, .42) 55%, var(--bg-0) 98%);
}

.page-hero .kicker { margin-bottom: 14px; }

.page-hero h1 {
  font-size: clamp(32px, 4.8vw, 54px);
  font-weight: 700;
  line-height: 1.22;
  letter-spacing: .015em;
  max-width: 20ch;
}

.page-hero .ph-lede {
  margin-top: 18px;
  color: var(--txt-2);
  font-size: clamp(15px, 1.5vw, 18px);
  max-width: 560px;
}

/* ---------- 数据带 ---------- */
.stats-band { border-block: 1px solid var(--line); background: var(--bg-1); }

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
}

.stat {
  display: flex;
  gap: 16px;
  align-items: flex-start;
  padding: 34px 26px;
  border-left: 1px solid var(--line);
}

.stat:first-child { border-left: 0; }

.stat-icon {
  flex-shrink: 0;
  width: 42px;
  height: 42px;
  display: grid;
  place-items: center;
  border-radius: 11px;
  background: var(--grad-soft);
  border: 1px solid rgba(5, 168, 157, .25);
  color: var(--teal-l);
}

.stat-num {
  font-family: var(--mono);
  font-size: clamp(30px, 3.2vw, 42px);
  font-weight: 700;
  line-height: 1.1;
  color: var(--txt);
}

.stat-unit { font-size: .55em; color: var(--teal-l); margin-left: 2px; }

.stat-label { font-size: 14.5px; font-weight: 600; margin-top: 6px; }

.stat-sub { font-size: 12.5px; color: var(--txt-3); margin-top: 2px; }

/* ---------- 四大智能层级卡片 ---------- */
.layers-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
}

.layer-card {
  position: relative;
  display: flex;
  flex-direction: column;
  padding: 28px 24px 24px;
  border-radius: var(--radius);
  background: var(--card);
  border: 1px solid var(--line);
  overflow: hidden;
  transition: transform .32s ease, border-color .32s ease, box-shadow .32s ease, background .32s ease;
}

.layer-card::before {  /* 顶角光带 */
  content: "";
  position: absolute;
  top: 0;
  left: 24px;
  right: 24px;
  height: 2px;
  border-radius: 2px;
  background: var(--grad);
  opacity: 0;
  transition: opacity .32s ease;
}

.layer-card::after {  /* hover 氛围光 */
  content: "";
  position: absolute;
  inset: auto -30% -55% -30%;
  height: 70%;
  background: radial-gradient(closest-side, rgba(5, 168, 157, .16), transparent);
  opacity: 0;
  transition: opacity .4s ease;
  pointer-events: none;
}

.layer-card:hover {
  transform: translateY(-6px);
  border-color: rgba(5, 168, 157, .38);
  background: var(--card-hi);
  box-shadow: var(--shadow-glow);
}

.layer-card:hover::before, .layer-card:hover::after { opacity: 1; }

.layer-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 18px;
}

.layer-icon {
  width: 46px;
  height: 46px;
  display: grid;
  place-items: center;
  border-radius: 12px;
  color: var(--teal-l);
  background: var(--grad-soft);
  border: 1px solid rgba(5, 168, 157, .25);
}

.layer-lv {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .2em;
  color: var(--txt-3);
}

.layer-card h3 { font-size: 19px; font-weight: 700; letter-spacing: .03em; }

.layer-card .lc-tag {
  margin-top: 4px;
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: .18em;
  color: var(--txt-3);
  text-transform: uppercase;
}

.layer-card p { margin-top: 12px; font-size: 13.5px; color: var(--txt-2); min-height: 66px; }

.layer-ability {
  margin-top: auto;
  padding-top: 16px;
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
}

.chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4.5px 12px;
  border-radius: 999px;
  font-size: 12.5px;
  color: var(--txt-2);
  background: rgba(255, 255, 255, .04);
  border: 1px solid var(--line);
  transition: color .25s ease, border-color .25s ease;
}

.chip::before {
  content: "";
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--teal);
}

.layer-card:hover .chip { color: var(--txt); border-color: var(--line-hi); }

.layer-go {
  margin-top: 18px;
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: .18em;
  color: var(--teal-l);
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.layer-go .arr { transition: transform .25s ease; }
.layer-card:hover .layer-go .arr { transform: translateX(4px); }

/* ---------- “肉包铁”之痛 ---------- */
.pain {
  position: relative;
  overflow: hidden;
  isolation: isolate;
}

.pain .pain-bg {
  position: absolute;
  inset: 0;
  z-index: -2;
  background: url(../assets/bg-city-night.webp) center / cover no-repeat;
}

.pain::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(1000px 560px at 18% 30%, rgba(0, 0, 0, .72), transparent 70%),
    linear-gradient(180deg, var(--bg-0) 0%, rgba(0, 0, 0, .78) 14%, rgba(0, 0, 0, .8) 86%, var(--bg-0) 100%);
}

.pain-vs {
  display: grid;
  grid-template-columns: 1fr 64px 1fr;
  align-items: stretch;
  gap: 0;
}

.pain-col { border-radius: var(--radius); padding: clamp(26px, 3vw, 40px); }

.pain-col--limit {
  background: rgba(10, 8, 8, .55);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 90, 90, .16);
}

.pain-col--cloud {
  background: rgba(4, 14, 16, .55);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(5, 168, 157, .28);
  box-shadow: 0 24px 70px -30px rgba(5, 168, 157, .4);
}

.pain-col h3 {
  font-size: clamp(19px, 2vw, 23px);
  font-weight: 700;
  display: flex;
  align-items: baseline;
  gap: 12px;
  margin-bottom: 8px;
}

.pain-col .pc-sub { font-size: 13.5px; color: var(--txt-2); margin-bottom: 24px; }

.pain-col--limit h3 .dot {
  width: 9px; height: 9px; border-radius: 50%;
  background: var(--danger);
  box-shadow: 0 0 12px rgba(255, 93, 93, .8);
  align-self: center;
}

.pain-col--cloud h3 .dot {
  width: 9px; height: 9px; border-radius: 50%;
  background: var(--teal-l);
  box-shadow: 0 0 12px rgba(55, 214, 200, .8);
  align-self: center;
}

.limit-item {
  display: flex;
  gap: 14px;
  padding: 15px 0;
  border-top: 1px dashed rgba(255, 255, 255, .1);
}

.limit-item:first-of-type { border-top: 0; padding-top: 0; }

.limit-icon {
  flex-shrink: 0;
  width: 34px; height: 34px;
  display: grid; place-items: center;
  border-radius: 9px;
  color: var(--danger);
  background: rgba(255, 93, 93, .09);
  border: 1px solid rgba(255, 93, 93, .22);
}

.limit-item h4 { font-size: 15.5px; font-weight: 600; }

.limit-item p { font-size: 13px; color: var(--txt-2); margin-top: 2px; }

.cloud-slogan {
  margin-top: 26px;
  font-size: clamp(17px, 1.8vw, 20px);
  font-weight: 700;
  line-height: 1.5;
}

.cloud-slogan em { font-style: normal; color: var(--teal-l); }

.scenarios {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 9px;
  margin-top: 6px;
}

.scenarios .chip {
  width: 100%;
  justify-content: flex-start;
  font-size: 13px;
  padding: 8px 13px;
  border-color: rgba(5, 168, 157, .24);
  background: rgba(5, 168, 157, .06);
}

.scenarios .chip::before { background: var(--teal-l); }

.pain-mid {
  position: relative;
  display: grid;
  place-items: center;
}

.pain-mid::before {
  content: "";
  position: absolute;
  top: 12px;
  bottom: 12px;
  width: 1px;
  background: linear-gradient(180deg, transparent, var(--line-hi), transparent);
}

.pain-mid .vs {
  position: relative;
  z-index: 1;
  width: 52px; height: 52px;
  display: grid; place-items: center;
  border-radius: 50%;
  font-family: var(--mono);
  font-size: 13px;
  letter-spacing: .1em;
  color: var(--txt-2);
  background: #05070b;
  border: 1px solid var(--line-hi);
}

/* ---------- 场景卡 ---------- */
.scenes-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
}

.scene-card {
  display: flex;
  flex-direction: column;
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--card);
  border: 1px solid var(--line);
  transition: transform .32s ease, border-color .32s ease, box-shadow .32s ease;
}

.scene-card:hover {
  transform: translateY(-6px);
  border-color: rgba(0, 118, 186, .4);
  box-shadow: 0 22px 56px -26px rgba(0, 118, 186, .5);
}

.scene-media {
  position: relative;
  aspect-ratio: 16 / 10;
  overflow: hidden;
  background: linear-gradient(140deg, #0c1219, #071318 60%, #0a0f14);
}

.scene-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform .5s ease;
}

.scene-card:hover .scene-media img { transform: scale(1.05); }

.scene-media::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 55%, rgba(0, 0, 0, .45));
}

.scene-tag {
  position: absolute;
  z-index: 1;
  top: 12px;
  left: 12px;
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: .2em;
  padding: 4px 10px;
  border-radius: 6px;
  color: #dff7f3;
  background: rgba(3, 10, 12, .6);
  -webkit-backdrop-filter: blur(6px);
  backdrop-filter: blur(6px);
  border: 1px solid rgba(55, 214, 200, .3);
}

.scene-body { padding: 20px 20px 22px; display: flex; flex-direction: column; flex: 1; }

.scene-body h3 { font-size: 17px; font-weight: 700; }

.scene-body p { margin-top: 9px; font-size: 13.5px; color: var(--txt-2); flex: 1; }

.scene-steps {
  margin-top: 14px;
  display: grid;
  gap: 6px;
  font-size: 12.5px;
  color: var(--txt-2);
}

.scene-steps li { display: flex; gap: 9px; align-items: baseline; }

.scene-steps .n {
  font-family: var(--mono);
  font-size: 10.5px;
  color: var(--teal-l);
  letter-spacing: .08em;
}

.scene-more {
  margin-top: 16px;
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: .16em;
  color: var(--teal-l);
}

/* ---------- 四象限能力全景 ---------- */
.quad-wrap {
  position: relative;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
  max-width: 980px;
  margin-inline: auto;
}

.quad {
  position: relative;
  padding: 26px 26px 22px;
  border-radius: var(--radius);
  background: var(--card);
  border: 1px solid var(--line);
  overflow: hidden;
  transition: border-color .3s ease, background .3s ease;
  z-index: 1;
}

.quad:hover, .quad:focus-within {
  border-color: rgba(5, 168, 157, .4);
  background: var(--card-hi);
}

.quad-head { display: flex; align-items: center; gap: 14px; }

.quad-icon {
  width: 42px; height: 42px;
  display: grid; place-items: center;
  border-radius: 11px;
  background: var(--grad-soft);
  border: 1px solid rgba(5, 168, 157, .25);
  color: var(--teal-l);
  flex-shrink: 0;
}

.quad-head h3 { font-size: 17.5px; font-weight: 700; line-height: 1.3; }

.quad-head .q-en {
  display: block;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: .24em;
  color: var(--txt-3);
  text-transform: uppercase;
  font-weight: 400;
  margin-top: 2px;
}

.quad-items {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 7px 14px;
  margin-top: 18px;
  max-height: 0;
  opacity: 0;
  transform: translateY(-6px);
  transition: max-height .45s ease, opacity .35s ease .05s, transform .35s ease .05s, margin .3s ease;
}

.quad:hover .quad-items, .quad:focus-within .quad-items {
  max-height: 200px;
  opacity: 1;
  transform: none;
}

.quad-items li {
  position: relative;
  padding-left: 16px;
  font-size: 13px;
  color: var(--txt-2);
  line-height: 1.6;
}

.quad-items li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .62em;
  width: 6px; height: 2px;
  border-radius: 2px;
  background: var(--grad);
}

.quad-hint {
  margin-top: 18px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .2em;
  color: var(--txt-3);
  text-align: center;
}

/* 中心徽记 */
.quad-center {
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  width: 116px; height: 116px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  background: radial-gradient(circle at 50% 40%, #0b1219, #05080c 75%);
  border: 1px solid var(--line-hi);
  box-shadow: 0 0 0 8px rgba(0, 0, 0, .55), 0 24px 60px -20px rgba(0, 118, 186, .5);
  z-index: 2;
  pointer-events: none;
  text-align: center;
}

.quad-center img { width: 44px; margin-inline: auto; }

.quad-center .qc-t {
  font-family: var(--mono);
  font-size: 8.5px;
  letter-spacing: .22em;
  color: var(--txt-3);
  margin-top: 5px;
}

/* ---------- 关于带 / CTA ---------- */
.about-band {
  position: relative;
  overflow: hidden;
  isolation: isolate;
  text-align: center;
}

.about-band .ab-bg {
  position: absolute;
  inset: 0;
  z-index: -2;
  background: url(../assets/bg-mountain-dawn.webp) center / cover no-repeat;
}

.about-band::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(900px 480px at 50% 60%, rgba(0, 0, 0, .5), transparent 72%),
    linear-gradient(180deg, var(--bg-0), rgba(0, 0, 0, .62) 22%, rgba(0, 0, 0, .62) 78%, var(--bg-0));
}

.about-band h2 {
  font-size: clamp(26px, 3.6vw, 42px);
  font-weight: 700;
  line-height: 1.35;
  max-width: 26ch;
  margin-inline: auto;
}

.about-band .ab-note {
  margin-top: 20px;
  color: var(--txt-2);
  font-size: clamp(14.5px, 1.4vw, 17px);
  max-width: 620px;
  margin-inline: auto;
}

.ab-badges {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px;
  margin-top: 26px;
}

.ab-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 16px;
  margin-top: 38px;
}

/* ---------- footer ---------- */
.footer {
  border-top: 1px solid var(--line);
  background: linear-gradient(180deg, var(--bg-1), #04060a);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr;
  gap: 44px;
  padding-block: 56px 44px;
}

.footer-brand p {
  margin-top: 16px;
  font-size: 13.5px;
  color: var(--txt-2);
  max-width: 34ch;
}

.footer-co {
  margin-top: 14px !important;
  font-family: var(--mono);
  font-size: 12px;
  color: var(--txt-3);
  letter-spacing: .08em;
}

.footer h4 {
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: .26em;
  color: var(--txt-3);
  font-weight: 600;
  margin-bottom: 18px;
  text-transform: uppercase;
}

.footer-nav { display: grid; gap: 10px; }

.footer-nav a, .footer-contact a {
  font-size: 14px;
  color: var(--txt-2);
  transition: color .25s ease;
  width: fit-content;
}

.footer-nav a:hover, .footer-contact a:hover { color: var(--teal-l); }

.footer-contact p { font-size: 14px; color: var(--txt-2); line-height: 1.9; }

.footer-bottom { border-top: 1px solid rgba(255, 255, 255, .06); }

.footer-bottom-inner {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 10px 24px;
  padding-block: 20px;
  font-size: 12.5px;
  color: var(--txt-3);
}

.footer-bottom .mono { letter-spacing: .06em; }

/* ---------- evolution 页 ---------- */
.subnav {
  position: sticky;
  top: var(--nav-h);
  z-index: 90;
  background: rgba(4, 6, 10, .78);
  -webkit-backdrop-filter: blur(16px);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--line);
}

.subnav-inner {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  scrollbar-width: none;
  padding-block: 12px;
}

.subnav-inner::-webkit-scrollbar { display: none; }

.subnav a {
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 18px;
  border-radius: 999px;
  font-size: 13.5px;
  color: var(--txt-2);
  border: 1px solid var(--line);
  transition: color .25s ease, border-color .25s ease, background .25s ease;
}

.subnav a .n { font-family: var(--mono); font-size: 10.5px; color: var(--txt-3); letter-spacing: .1em; }

.subnav a:hover { color: var(--txt); border-color: var(--line-hi); }

.subnav a.active {
  color: #fff;
  border-color: transparent;
  background: var(--grad);
}
.subnav a.active .n { color: rgba(255, 255, 255, .75); }

.stage-sec { padding-block: clamp(64px, 8vw, 110px); }

.stage-sec + .stage-sec { border-top: 1px solid var(--line); }

.stage-head { display: flex; align-items: flex-end; gap: 26px; margin-bottom: 40px; flex-wrap: wrap; }

.stage-big {
  font-family: var(--mono);
  font-size: clamp(72px, 9vw, 120px);
  font-weight: 700;
  line-height: .85;
  color: transparent;
  -webkit-text-stroke: 1.5px rgba(55, 214, 200, .55);
  letter-spacing: -.02em;
}

.stage-head-txt h2 { font-size: clamp(26px, 3vw, 36px); font-weight: 700; }

.stage-head-txt .s-en {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .26em;
  color: var(--txt-3);
  text-transform: uppercase;
  display: block;
  margin-bottom: 8px;
}

.stage-head-txt p { margin-top: 10px; color: var(--txt-2); max-width: 60ch; font-size: 15px; }

.stage-cols {
  display: grid;
  grid-template-columns: 1.35fr 1fr;
  gap: 22px;
  align-items: start;
}

.ability-list { display: grid; gap: 12px; }

.ability-item {
  display: flex;
  gap: 16px;
  padding: 18px 20px;
  border-radius: 12px;
  background: var(--card);
  border: 1px solid var(--line);
  transition: border-color .28s ease, background .28s ease;
}

.ability-item:hover { border-color: rgba(0, 118, 186, .35); background: var(--card-hi); }

.ability-item .ai-n {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--teal-l);
  letter-spacing: .14em;
  padding-top: 4px;
  flex-shrink: 0;
}

.ability-item h4 { font-size: 15.5px; font-weight: 600; }

.ability-item p { font-size: 13px; color: var(--txt-2); margin-top: 3px; }

/* 高德融合面板 */
.amap-panel {
  position: relative;
  border-radius: var(--radius);
  padding: 26px 24px;
  background: linear-gradient(165deg, rgba(0, 118, 186, .12), rgba(5, 168, 157, .07) 65%, rgba(255, 255, 255, .02));
  border: 1px solid rgba(0, 118, 186, .3);
  overflow: hidden;
}

.amap-panel::before {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: var(--grad);
}

.amap-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .2em;
  color: #bfe7ff;
  padding: 5px 12px;
  border-radius: 999px;
  background: rgba(0, 118, 186, .16);
  border: 1px solid rgba(69, 169, 234, .35);
  margin-bottom: 16px;
}

.amap-panel h4 { font-size: 16.5px; font-weight: 700; margin-bottom: 4px; }

.amap-panel .ap-sub { font-size: 12.5px; color: var(--txt-3); margin-bottom: 14px; }

.amap-panel ul { display: grid; gap: 11px; }

.amap-panel li { font-size: 13.5px; color: var(--txt-2); display: flex; gap: 10px; }

.amap-panel li::before {
  content: "×";
  font-family: var(--mono);
  color: var(--blue-l);
  font-size: 12px;
  padding-top: 1px;
  flex-shrink: 0;
}

.amap-panel li strong { color: var(--txt); font-weight: 600; }

/* 三关键词/技术特点 通用 trio */
.trio { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }

.trio .t-card {
  padding: 20px;
  border-radius: 12px;
  background: var(--card);
  border: 1px solid var(--line);
  transition: border-color .28s ease, transform .28s ease;
}

.trio .t-card:hover { border-color: rgba(5, 168, 157, .35); transform: translateY(-4px); }

.t-card .t-n {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--teal-l);
  letter-spacing: .2em;
}

.t-card h4 { font-size: 16px; font-weight: 700; margin-top: 8px; }

.t-card p { font-size: 12.5px; color: var(--txt-2); margin-top: 6px; }

/* V2X 协议栈区 */
.stack-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; margin-top: 26px; }

/* 四大特性（V2X 协议栈） */
.feat-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; margin-top: 26px; }

.feat-grid .t-card .t-n { color: var(--blue-l); }

/* 演进路线（时间带） */
.route-band {
  border-block: 1px solid var(--line);
  background: var(--bg-1);
  overflow: hidden;
}

.route-rail {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  position: relative;
}

.route-rail::before {
  content: "";
  position: absolute;
  top: 9px;
  left: 6%;
  right: 6%;
  height: 2px;
  background: linear-gradient(90deg, rgba(0, 118, 186, .6), rgba(5, 168, 157, .6));
}

.route-item { position: relative; padding: 34px 22px 8px; }

.route-item::before {
  content: "";
  position: absolute;
  top: 3px;
  left: 22px;
  width: 14px; height: 14px;
  border-radius: 50%;
  background: #060a0f;
  border: 2px solid var(--teal);
  box-shadow: 0 0 14px rgba(5, 168, 157, .55);
}

.route-item .r-lv { font-family: var(--mono); font-size: 10.5px; letter-spacing: .22em; color: var(--teal-l); }

.route-item h4 { font-size: 16.5px; font-weight: 700; margin-top: 5px; }

.route-item p { font-size: 12.5px; color: var(--txt-2); margin-top: 5px; }

/* ---------- companion 页 ---------- */
.voice-quote {
  position: relative;
  margin-top: 34px;
  padding: 30px 32px;
  border-radius: var(--radius);
  background: var(--card);
  border: 1px solid var(--line);
  display: flex;
  align-items: center;
  gap: 26px;
  flex-wrap: wrap;
}

.voice-quote .vq-mark {
  font-family: var(--mono);
  font-size: 54px;
  line-height: .6;
  color: var(--teal);
  transform: translateY(10px);
}

.voice-quote blockquote {
  font-size: clamp(17px, 2vw, 21px);
  font-weight: 600;
  line-height: 1.6;
  flex: 1;
  min-width: 260px;
}

.voice-quote blockquote em { font-style: normal; color: var(--teal-l); }

/* 声波动画 */
.wave {
  display: flex;
  align-items: flex-end;
  gap: 4px;
  height: 44px;
  flex-shrink: 0;
}

.wave span {
  width: 4px;
  border-radius: 3px;
  background: var(--grad);
  height: calc(var(--h) * 1%);
  transform-origin: bottom;
  animation: wave 1.6s ease-in-out infinite;
  animation-delay: calc(var(--i) * .09s);
}

@keyframes wave {
  0%, 100% { transform: scaleY(.45); }
  50% { transform: scaleY(1); }
}

.agent-steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
  margin-top: 30px;
  counter-reset: step;
}

.agent-step {
  position: relative;
  padding: 24px 22px;
  border-radius: 12px;
  background: var(--card);
  border: 1px solid var(--line);
  transition: border-color .28s ease, transform .28s ease;
}

.agent-step:hover { border-color: rgba(5, 168, 157, .35); transform: translateY(-4px); }

.agent-step .as-n {
  font-family: var(--mono);
  font-size: 26px;
  font-weight: 700;
  color: transparent;
  -webkit-text-stroke: 1px rgba(55, 214, 200, .7);
}

.agent-step h4 { font-size: 16px; font-weight: 700; margin-top: 10px; }

.agent-step p { font-size: 13px; color: var(--txt-2); margin-top: 6px; }

/* 12 类 POI 数据四层 */
.poi-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; }

.poi-card {
  padding: 24px;
  border-radius: var(--radius);
  background: var(--card);
  border: 1px solid var(--line);
  transition: border-color .28s ease, background .28s ease;
}

.poi-card:hover { border-color: rgba(0, 118, 186, .35); background: var(--card-hi); }

.poi-card .p-layer {
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: .24em;
  color: var(--blue-l);
}

.poi-card h4 { font-size: 17px; font-weight: 700; margin-top: 8px; }

.poi-card p { font-size: 13px; color: var(--txt-2); margin-top: 6px; }

.poi-card .fields { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 14px; }

.poi-card .fields .chip { font-size: 11.5px; padding: 3px 10px; color: var(--txt-3); }

/* ---------- partner 页 ---------- */
.fusion-grid { display: grid; grid-template-columns: repeat(6, 1fr); gap: 16px; }

.fusion-card {
  grid-column: span 2;
  position: relative;
  padding: 26px 24px;
  border-radius: var(--radius);
  background: var(--card);
  border: 1px solid var(--line);
  overflow: hidden;
  transition: transform .3s ease, border-color .3s ease, box-shadow .3s ease;
}

.fusion-card:first-child { grid-column: span 3; }
.fusion-card:nth-child(2) { grid-column: span 3; }

.fusion-card:hover {
  transform: translateY(-5px);
  border-color: rgba(0, 118, 186, .38);
  box-shadow: 0 20px 50px -24px rgba(0, 118, 186, .5);
}

.fusion-card .f-n {
  position: absolute;
  top: 18px;
  right: 20px;
  font-family: var(--mono);
  font-size: 30px;
  font-weight: 700;
  color: transparent;
  -webkit-text-stroke: 1px rgba(255, 255, 255, .14);
}

.fusion-icon {
  width: 44px; height: 44px;
  display: grid; place-items: center;
  border-radius: 11px;
  background: var(--grad-soft);
  border: 1px solid rgba(5, 168, 157, .25);
  color: var(--teal-l);
}

.fusion-card h3 { font-size: 18px; font-weight: 700; margin-top: 16px; }

.fusion-card .f-sub {
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: .2em;
  color: var(--txt-3);
  text-transform: uppercase;
  margin-top: 4px;
}

.fusion-card p { font-size: 13.5px; color: var(--txt-2); margin-top: 12px; }

/* 发布会引用带 */
.launch-band {
  position: relative;
  overflow: hidden;
  isolation: isolate;
  text-align: center;
}

.launch-band .lb-bg {
  position: absolute;
  inset: 0;
  z-index: -2;
  background: url(../assets/bg-tech-abstract.webp) center / cover no-repeat;
}

.launch-band::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(760px 420px at 50% 46%, rgba(0, 0, 0, .55), transparent 72%),
    linear-gradient(180deg, var(--bg-0), rgba(0, 0, 0, .72) 25%, rgba(0, 0, 0, .72) 75%, var(--bg-0));
}

.launch-band blockquote {
  font-size: clamp(20px, 2.6vw, 30px);
  font-weight: 700;
  line-height: 1.55;
  max-width: 30ch;
  margin-inline: auto;
}

.launch-band blockquote em { font-style: normal; color: transparent; background: var(--grad); -webkit-background-clip: text; background-clip: text; }

.launch-band cite {
  display: block;
  margin-top: 22px;
  font-style: normal;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .2em;
  color: var(--txt-3);
}

/* ---------- about 页 ---------- */
.mission-hero { text-align: center; }

.mission-hero .m-mark { font-family: var(--mono); font-size: clamp(58px, 8vw, 96px); line-height: 1; color: var(--teal); }

.mission-hero h2 {
  font-size: clamp(28px, 4.4vw, 52px);
  font-weight: 700;
  line-height: 1.3;
  margin-top: 18px;
}

.mission-hero .m-sub { margin-top: 18px; color: var(--txt-2); font-size: clamp(15px, 1.6vw, 18px); max-width: 560px; margin-inline: auto; }

.value-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }

.value-card {
  padding: 26px 24px;
  border-radius: var(--radius);
  background: var(--card);
  border: 1px solid var(--line);
  transition: border-color .28s ease, transform .28s ease;
}

.value-card:hover { border-color: rgba(5, 168, 157, .35); transform: translateY(-4px); }

.value-card h4 { font-size: 16.5px; font-weight: 700; display: flex; align-items: center; gap: 10px; }

.value-card h4 svg { color: var(--teal-l); flex-shrink: 0; }

.value-card p { font-size: 13.5px; color: var(--txt-2); margin-top: 10px; }

.dims { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 26px; }

.dims .chip { font-size: 14px; padding: 8px 18px; color: var(--txt); }

/* 联系占位 */
.contact-box {
  border-radius: var(--radius);
  border: 1px dashed var(--line-hi);
  background: var(--card);
  padding: clamp(32px, 4vw, 52px);
  text-align: center;
  max-width: 720px;
  margin-inline: auto;
}

.contact-box h3 { font-size: clamp(20px, 2.4vw, 26px); font-weight: 700; }

.contact-box p { color: var(--txt-2); font-size: 14.5px; margin-top: 12px; }

.contact-box .cb-note {
  margin-top: 18px;
  display: inline-flex;
  align-items: center;
  gap: 9px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--txt-3);
  padding: 7px 16px;
  border-radius: 999px;
  border: 1px solid var(--line);
}

.cb-note .pulse {
  width: 7px; height: 7px; border-radius: 50%;
  background: var(--teal-l);
  box-shadow: 0 0 10px rgba(55, 214, 200, .8);
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse { 0%, 100% { opacity: 1; } 50% { opacity: .35; } }

/* ---------- 动效 ---------- */
.reveal {
  opacity: 0;
  transform: translateY(26px);
  transition: opacity .7s cubic-bezier(.16, 1, .3, 1), transform .7s cubic-bezier(.16, 1, .3, 1);
  transition-delay: var(--d, 0s);
  will-change: opacity, transform;
}

.reveal.in { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation: none !important; transition: none !important; }
  .reveal { opacity: 1; transform: none; }
}

/* ---------- 响应式 ---------- */
@media (max-width: 1080px) {
  .layers-grid, .scenes-grid { grid-template-columns: repeat(2, 1fr); }
  .layer-card p { min-height: 0; }
  .fusion-grid { grid-template-columns: repeat(2, 1fr); }
  .fusion-card, .fusion-card:first-child, .fusion-card:nth-child(2) { grid-column: span 2; }
  .stage-cols { grid-template-columns: 1fr; }
  .quad-center { display: none; }
  .quad-items { max-height: none; opacity: 1; transform: none; }
  .quad-hint { display: none; }
  .stage-rail-grid { grid-template-columns: repeat(2, 1fr); }
  .stage-rail a:nth-child(odd) { border-left: 0; }
  .stage-rail a:nth-child(n + 3) { border-top: 1px solid rgba(255, 255, 255, .09); }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .stat:nth-child(3) { border-left: 0; }
  .stat:nth-child(n + 3) { border-top: 1px solid var(--line); }
  .route-rail { grid-template-columns: repeat(2, 1fr); row-gap: 26px; }
  .route-rail::before { display: none; }
  .trio, .stack-grid, .agent-steps { grid-template-columns: 1fr; }
  .feat-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  :root { --nav-h: 60px; }

  .nav-toggle { display: flex; }

  .nav-links {
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    width: min(78vw, 320px);
    flex-direction: column;
    align-items: flex-start;
    gap: 4px;
    padding: calc(var(--nav-h) + 20px) 26px 30px;
    background: rgba(4, 6, 10, .96);
    -webkit-backdrop-filter: blur(20px);
    backdrop-filter: blur(20px);
    border-left: 1px solid var(--line);
    transform: translateX(100%);
    transition: transform .35s cubic-bezier(.22, 1, .36, 1);
    visibility: hidden;
  }

  .nav-links.open {
    transform: none;
    visibility: visible;
  }

  .nav-links > a:not(.nav-cta) { font-size: 16px; padding: 11px 4px; width: 100%; }
  .nav-links > a:not(.nav-cta)::after { display: none; }
  .nav-cta { margin: 14px 0 0; width: 100%; }

  .hero h1 { max-width: 12ch; }
  .hero-actions .btn { flex: 1 1 auto; }

  .layers-grid, .scenes-grid, .poi-grid, .fusion-grid,
  .stats-grid, .route-rail, .stage-rail-grid, .feat-grid { grid-template-columns: 1fr; }

  .stat { border-left: 0; border-top: 1px solid var(--line); }
  .stat:first-child { border-top: 0; }

  .stage-rail a { border-left: 0; border-top: 1px solid rgba(255, 255, 255, .08); }
  .stage-rail a:first-child { border-top: 0; }

  .pain-vs { grid-template-columns: 1fr; }
  .pain-mid { padding-block: 18px; }
  .pain-mid::before {
    top: 0; bottom: 0; left: 50%;
    width: 1px;
    transform: translateX(-50%);
    background: linear-gradient(90deg, transparent, var(--line-hi), transparent);
  }

  .scenarios { grid-template-columns: 1fr; }

  .quad-wrap { grid-template-columns: 1fr; }
  .quad-items { grid-template-columns: 1fr; }

  .footer-grid { grid-template-columns: 1fr; gap: 34px; padding-block: 44px 34px; }

  .sec-num { font-size: 72px; right: 18px; top: 12px; }

  .footer-bottom-inner { justify-content: center; text-align: center; }
}

/* 触屏设备常显四象限明细 */
@media (hover: none) {
  .quad-items { max-height: none; opacity: 1; transform: none; }
  .quad-hint { display: none; }
}

/* ===== Footer 公众号二维码 ===== */
.footer-qr-grid {
  display: flex;
  gap: 28px;
  flex-wrap: wrap;
}
.footer-mp {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-top: 6px;
}
.footer-mp .mp-qrcode {
  width: 96px;
  height: 96px;
  border-radius: 10px;
  border: 1px solid rgba(5, 168, 157, 0.35);
  background: #fff;
  padding: 6px;
  flex-shrink: 0;
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}
.footer-mp .mp-qrcode:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 24px rgba(0, 118, 186, 0.35);
}
.footer-mp p {
  font-size: 13px;
  color: var(--txt-2, #9aa7b5);
  line-height: 1.8;
}
@media (max-width: 768px) {
  .footer-mp { flex-direction: column; align-items: flex-start; gap: 10px; }
}

/* ================= models.html · 即将发售 ================= */
.m-hero {
  position: relative;
  min-height: 100vh;
  min-height: 100svh;
  display: flex;
  align-items: center;
  overflow: hidden;
  isolation: isolate;
}

.m-hero .m-bg {
  position: absolute;
  inset: -8% 0;
  z-index: -2;
  background: url(../assets/bike-red-cover.webp) center 38% / cover no-repeat;
  will-change: transform;
}

.m-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(880px 620px at 26% 46%, rgba(0, 0, 0, .6), transparent 68%),
    linear-gradient(180deg, rgba(0, 0, 0, .55) 0%, rgba(0, 0, 0, .3) 46%, rgba(0, 0, 0, .82) 90%, var(--bg-0) 100%);
}

.m-hero h1 {
  font-size: clamp(52px, 9vw, 108px);
  font-weight: 700;
  line-height: 1.08;
  letter-spacing: .04em;
  text-shadow: 0 8px 48px rgba(0, 0, 0, .6);
}

.m-hero .m-sub {
  margin-top: 20px;
  font-size: clamp(16px, 1.9vw, 21px);
  color: rgba(244, 247, 251, .9);
  letter-spacing: .05em;
  max-width: 40ch;
  text-shadow: 0 2px 20px rgba(0, 0, 0, .65);
}

.m-hero .hero-actions { margin-top: 38px; }

.m-scroll-hint {
  position: absolute;
  left: 50%;
  bottom: 22px;
  transform: translateX(-50%);
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .3em;
  color: var(--txt-3);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  z-index: 1;
}

.m-scroll-hint::after {
  content: "";
  width: 1px;
  height: 34px;
  background: linear-gradient(180deg, var(--teal-l), transparent);
  animation: hint-drop 1.8s ease-in-out infinite;
}

@keyframes hint-drop {
  0%, 100% { transform: scaleY(.4); transform-origin: top; opacity: .4; }
  50% { transform: scaleY(1); opacity: 1; }
}

/* 发布信息条：日期 + 倒计时 */
.launch-bar {
  border-block: 1px solid var(--line);
  background:
    radial-gradient(900px 300px at 12% 0%, rgba(0, 118, 186, .1), transparent 60%),
    var(--bg-1);
}

.launch-bar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 36px;
  padding-block: clamp(30px, 4.5vw, 52px);
  flex-wrap: wrap;
}

.lb-date { display: flex; align-items: baseline; gap: 14px; flex-wrap: wrap; }

.lb-date .big {
  font-family: var(--mono);
  font-size: clamp(44px, 6vw, 76px);
  font-weight: 700;
  line-height: 1;
  font-variant-numeric: tabular-nums;
  letter-spacing: .02em;
}

.lb-date .big .yr { font-size: .42em; color: var(--txt-3); font-weight: 500; margin-right: 6px; }

.lb-where {
  font-size: clamp(15px, 1.6vw, 18px);
  font-weight: 600;
  color: var(--txt);
  letter-spacing: .06em;
}

.lb-where em { font-style: normal; color: var(--teal-l); }

.lb-tag {
  display: inline-block;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .24em;
  color: var(--blue-l);
  border: 1px solid rgba(69, 169, 234, .4);
  border-radius: 999px;
  padding: 5px 14px;
  margin-bottom: 10px;
}

/* 倒计时 */
.countdown {
  display: flex;
  align-items: center;
  gap: clamp(10px, 1.6vw, 20px);
}

.cd-lab-top {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .26em;
  color: var(--txt-3);
  margin-bottom: 10px;
}

.cd-cell { display: flex; flex-direction: column; align-items: center; gap: 6px; }

.cd-num {
  font-family: var(--mono);
  font-size: clamp(32px, 4.2vw, 54px);
  font-weight: 700;
  line-height: 1;
  font-variant-numeric: tabular-nums;
  min-width: 1.6em;
  text-align: center;
  color: var(--txt);
}

.cd-cell--d .cd-num {
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.cd-lab { font-size: 12px; color: var(--txt-3); letter-spacing: .18em; }

.cd-sep {
  font-family: var(--mono);
  font-size: clamp(24px, 3vw, 38px);
  color: var(--txt-3);
  padding-bottom: 22px;
  animation: cd-blink 1s steps(1) infinite;
}

@keyframes cd-blink { 50% { opacity: .25; } }

.cd-done {
  display: none;
  font-size: clamp(17px, 2vw, 22px);
  font-weight: 700;
  color: var(--teal-l);
  letter-spacing: .1em;
}

.countdown.is-live .cd-cell, .countdown.is-live .cd-sep, .countdown.is-live .cd-lab-top { display: none; }
.countdown.is-live .cd-done { display: block; }

/* 双车型卡 */
.model-cards {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
}

.model-card {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius);
  background: linear-gradient(165deg, var(--bg-2), var(--bg-1) 70%);
  border: 1px solid var(--line);
  padding: clamp(30px, 4vw, 52px) clamp(26px, 3.4vw, 44px);
  min-height: 380px;
  display: flex;
  flex-direction: column;
  transition: transform .32s ease, border-color .32s ease, box-shadow .32s ease;
}

.model-card::after {
  content: "";
  position: absolute;
  inset: auto -20% -45% -20%;
  height: 62%;
  background: radial-gradient(closest-side, rgba(5, 168, 157, .14), transparent);
  opacity: 0;
  transition: opacity .4s ease;
  pointer-events: none;
}

.model-card:hover {
  transform: translateY(-6px);
  border-color: rgba(5, 168, 157, .4);
  box-shadow: var(--shadow-glow);
}

.model-card:hover::after { opacity: 1; }

.mc-top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: auto;
}

.mc-tag {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .26em;
  color: var(--txt-3);
}

.mc-chip {
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: .18em;
  color: #ffd9d4;
  background: rgba(255, 82, 62, .1);
  border: 1px solid rgba(255, 106, 82, .38);
  border-radius: 999px;
  padding: 4px 12px;
}

.mc-motif { color: rgba(55, 214, 200, .5); }

.mc-name {
  font-family: var(--mono);
  font-size: clamp(64px, 8vw, 104px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: .01em;
  margin-top: 26px;
}

.mc-name .yr-num { color: transparent; -webkit-text-stroke: 1.5px rgba(244, 247, 251, .85); }

.mc-type {
  margin-top: 12px;
  font-size: clamp(16px, 1.7vw, 19px);
  font-weight: 700;
  letter-spacing: .08em;
}

.mc-type em { font-style: normal; color: var(--teal-l); }

.mc-desc { margin-top: 10px; font-size: 14px; color: var(--txt-2); max-width: 34ch; }

/* CTA 带文字引导 */
.mp-cta {
  display: inline-flex;
  align-items: center;
  gap: 14px;
  padding: 18px 30px;
  border-radius: var(--radius);
  border: 1px dashed rgba(5, 168, 157, .4);
  background: rgba(5, 168, 157, .05);
  transition: border-color .28s ease, background .28s ease, transform .28s ease;
}

.mp-cta:hover { border-color: rgba(55, 214, 200, .7); background: rgba(5, 168, 157, .1); transform: translateY(-3px); }

.mp-cta svg { color: var(--teal-l); flex-shrink: 0; }

.mp-cta .t1 { font-weight: 700; font-size: 15.5px; }

.mp-cta .t2 { font-size: 12.5px; color: var(--txt-3); margin-top: 2px; }

@media (max-width: 768px) {
  .model-cards { grid-template-columns: 1fr; }
  .model-card { min-height: 300px; }
  .launch-bar-inner { flex-direction: column; align-items: flex-start; }
}

/* ===== 车型卡参数列表（WW5）===== */
.mc-specs {
  list-style: none;
  margin: 14px 0 0;
  padding: 0;
  display: grid;
  gap: 8px;
}
.mc-specs li {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 12px;
  padding: 8px 12px;
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.04);
  border-left: 2px solid rgba(5, 168, 157, 0.55);
  font-size: 13px;
}
.mc-specs b {
  color: #e8f4f8;
  font-weight: 600;
  white-space: nowrap;
}
.mc-specs span {
  color: #8fa0ad;
  font-size: 12px;
  text-align: right;
}
@media (max-width: 768px) {
  .mc-specs li { flex-direction: column; gap: 2px; align-items: flex-start; }
  .mc-specs span { text-align: left; }
}

/* ================= WW6 · 骑行伴侣模块 + 骑行房间 ================= */
/* 组网点线装饰（内联 SVG + CSS 动画，无图片） */
.module-sec { overflow: hidden; }

.module-sec .container { position: relative; z-index: 1; }



.net-lines path {
  stroke-dasharray: 3 7;
  animation: net-flow 2.6s linear infinite;
}

.net-lines path:nth-child(2) { animation-delay: -.6s; }
.net-lines path:nth-child(3) { animation-delay: -1.2s; }
.net-lines path:nth-child(4) { animation-delay: -1.8s; }

@keyframes net-flow { to { stroke-dashoffset: -40; } }

.net-dot { animation: net-pulse 3.2s ease-in-out infinite; }
.net-dot:nth-child(1) { animation-delay: 0s; }
.net-dot:nth-child(2) { animation-delay: .4s; }
.net-dot:nth-child(3) { animation-delay: .8s; }
.net-dot:nth-child(4) { animation-delay: 1.2s; }
.net-dot:nth-child(5) { animation-delay: 1.6s; }
.net-dot:nth-child(6) { animation-delay: 2s; }
.net-dot:nth-child(7) { animation-delay: 2.4s; }

@keyframes net-pulse {
  0%, 100% { opacity: .35; }
  50% { opacity: 1; }
}

.net-halo {
  animation: net-halo 3.2s ease-in-out infinite;
  transform-origin: 372px 118px;
}

@keyframes net-halo {
  0%, 100% { transform: scale(1); opacity: .5; }
  50% { transform: scale(1.6); opacity: .12; }
}

/* 模块双卡 */
.module-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
  max-width: 920px;
}

.module-card {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius);
  background: linear-gradient(165deg, rgba(5, 168, 157, .05), var(--card) 55%);
  border: 1px solid var(--line);
  padding: 32px 30px;
  transition: transform .32s ease, border-color .32s ease, box-shadow .32s ease;
}

.module-card::after {
  content: "";
  position: absolute;
  inset: auto -30% -50% -30%;
  height: 60%;
  background: radial-gradient(closest-side, rgba(5, 168, 157, .13), transparent);
  opacity: 0;
  transition: opacity .4s ease;
  pointer-events: none;
}

.module-card:hover {
  transform: translateY(-6px);
  border-color: rgba(5, 168, 157, .4);
  box-shadow: var(--shadow-glow);
}

.module-card:hover::after { opacity: 1; }

.mo-icon {
  width: 50px;
  height: 50px;
  display: grid;
  place-items: center;
  border-radius: 13px;
  color: var(--teal-l);
  background: var(--grad-soft);
  border: 1px solid rgba(5, 168, 157, .25);
  margin-bottom: 20px;
}

.mo-tag {
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: .26em;
  color: var(--txt-3);
}

.module-card h3 { font-size: 21px; font-weight: 700; margin-top: 8px; }

.module-card p:not(.mo-tag) { font-size: 14px; color: var(--txt-2); margin-top: 10px; line-height: 1.95; }

.module-slogan {
  margin-top: 34px;
  font-size: clamp(16px, 1.8vw, 19px);
  font-weight: 700;
  color: var(--txt-2);
}

.module-slogan em { font-style: normal; color: var(--teal-l); }

/* 骑行房间三卡 */
.room-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.room-card {
  display: flex;
  flex-direction: column;
  border-radius: var(--radius);
  background: var(--card);
  border: 1px solid var(--line);
  padding: 28px 26px;
  transition: transform .32s ease, border-color .32s ease, box-shadow .32s ease, background .32s ease;
}

.room-card:hover {
  transform: translateY(-6px);
  border-color: rgba(5, 168, 157, .38);
  background: var(--card-hi);
  box-shadow: var(--shadow-glow);
}

.ro-icon {
  width: 46px;
  height: 46px;
  display: grid;
  place-items: center;
  border-radius: 12px;
  color: var(--teal-l);
  background: var(--grad-soft);
  border: 1px solid rgba(5, 168, 157, .25);
  margin-bottom: 18px;
}

.room-card h3 { font-size: 18px; font-weight: 700; }

.room-card p { margin-top: 10px; font-size: 13.5px; color: var(--txt-2); line-height: 1.95; flex: 1; }

.room-card em { font-style: normal; color: var(--txt); }

/* 畅想预告注解 */
.vision-note {
  margin-top: 30px;
  text-align: center;
  font-size: 12.5px;
  color: var(--txt-3);
  letter-spacing: .04em;
}

@media (max-width: 1080px) {
  .room-grid { grid-template-columns: 1fr; }
  .module-grid { max-width: none; }
}

@media (max-width: 768px) {
  .module-grid { grid-template-columns: 1fr; }
  }

/* ================= WW10 · 到点揭幕（12:00 实车+价格） ================= */
.mc-media {
  position: relative;
  aspect-ratio: 16 / 10;
  border-radius: 10px;
  overflow: hidden;
  border: 1px solid var(--line);
  margin-bottom: 22px;
  background: #07090d;
}

.mc-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: opacity .5s ease, transform .5s ease;
}

.mc-media::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 62%, rgba(0, 0, 0, .5));
  pointer-events: none;
}

/* 揭幕切换动效 */
[data-reveal-src].is-swapping { opacity: 0; }

[data-reveal-src].is-revealed {
  animation: reveal-img .9s cubic-bezier(.16, 1, .3, 1);
}

@keyframes reveal-img {
  from { opacity: 0; transform: scale(1.045); filter: brightness(1.5) saturate(1.2); }
  to   { opacity: 1; transform: none; filter: none; }
}

[data-reveal-text] { transition: opacity .35s ease, letter-spacing .35s ease; }

[data-reveal-text].is-swapping { opacity: 0; }

[data-reveal-text].is-revealed { animation: reveal-txt .8s cubic-bezier(.16, 1, .3, 1); }

@keyframes reveal-txt {
  from { opacity: 0; letter-spacing: .18em; }
  to   { opacity: 1; letter-spacing: .04em; }
}

/* 价格块（默认隐藏，JS 到点填充并显示） */
.price-block {
  display: none;
  margin-top: 22px;
  padding-top: 18px;
  border-top: 1px dashed rgba(5, 168, 157, .35);
  align-items: baseline;
  gap: 12px;
  flex-wrap: wrap;
}

.price-block.on {
  display: flex;
  animation: reveal-price .8s cubic-bezier(.16, 1, .3, 1) .15s both;
}

@keyframes reveal-price {
  from { opacity: 0; transform: translateY(10px); }
  to   { opacity: 1; transform: none; }
}

.pb-label {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .22em;
  color: var(--txt-3);
}

.pb-num {
  font-family: var(--mono);
  font-size: clamp(28px, 2.8vw, 36px);
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  line-height: 1;
}

.pb-deposit {
  font-size: 12.5px;
  color: var(--txt-3);
}

.pb-deposit b { color: var(--teal-l); font-weight: 600; }