/* ============================================================
   Chase-One — shared stylesheet
   Apple-inspired design system (see DESIGN.md)
   Neutral triad: #000000 / #f5f5f7 / #ffffff
   Blue #0071e3 reserved for actions & links only.
   ============================================================ */

/* ---------- Tokens ---------- */
:root {
  /* neutral triad */
  --black:      #000000;
  --paper:      #f5f5f7;
  --white:      #ffffff;

  /* ink + neutrals */
  --ink:        #1d1d1f;
  --ink-2:      #6e6e73;
  --border:     #d2d2d7;
  --border-2:   #86868b;
  --graphite:   #272729;
  --graphite-2: #2a2a2c;

  /* on-dark neutrals */
  --on-dark:        #f5f5f7;
  --on-dark-muted:  #a1a1a6;
  --on-dark-border: #3a3a3c;

  /* action blue — scarce */
  --blue:         #0071e3;
  --blue-hover:   #0066cc;
  --blue-bright:  #2997ff; /* on dark */

  /* radius tiers — never flatten to one */
  --r-tag:     5px;
  --r-control: 12px;
  --r-card:    18px;
  --r-spot:    32px;
  --r-pill:    980px;

  /* layout */
  --core:   1240px;
  --gutter: clamp(20px, 5vw, 40px);

  /* type */
  --f-display: 'Poppins', -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
  --f-body:    'Poppins', -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
  --f-mono:    'Poppins', -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;

  --nav-h: 52px;
}

/* ---------- Reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; scroll-padding-top: 70px; }
body {
  font-family: var(--f-body);
  font-size: 17px;
  line-height: 1.47;
  font-weight: 400;
  color: var(--ink);
  background: var(--white);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}
img { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { font: inherit; cursor: pointer; border: 0; background: none; color: inherit; }
ul { list-style: none; padding: 0; }

/* ---------- Layout helpers ---------- */
.wrap {
  width: 100%;
  max-width: var(--core);
  margin-inline: auto;
  padding-inline: var(--gutter);
}
.chapter { width: 100%; }
.chapter--black { background: var(--black); color: var(--on-dark); }
.chapter--paper { background: var(--paper); color: var(--ink); }
.chapter--white { background: var(--white); color: var(--ink); }
/* 区块背景图（R2 注水）：仍带 chapter--black 作底色兜底；render.js 把 R2 图填进 background-image，
   上面叠一层可调暗罩 --bg-scrim——保浅色文案可读，同时不压掉底图鲜蓝。调深浅只改这一行 rgba 的 alpha 即可 */
.chapter--bg {
  --bg-scrim: none;   /* 不加暗罩：直接显 R2 底图鲜蓝（要回暗罩把 none 改成 linear-gradient(rgba(...)) 即可） */
  /* 蓝色兜底渐变：图未到时先显它，消除“黑→蓝”闪；render.js 把它作为最底层，真图叠其上 */
  --bg-fallback: linear-gradient(120deg, #1a8fe6 0%, #0c46b8 52%, #072a86 100%);
  background-color: #0b2f7a;
  background-image: var(--bg-fallback);
  background-size: cover; background-position: center; background-repeat: no-repeat;
}

.section-pad   { padding-block: clamp(72px, 11vw, 140px); }
.section-pad-s { padding-block: clamp(56px, 8vw, 96px); }

/* ---------- Type primitives ---------- */
.display {
  font-family: var(--f-display);
  font-weight: 600;
  line-height: 1.05;
  letter-spacing: -0.022em;
}
.eyebrow {
  font-family: var(--f-mono);
  font-size: 12px;
  font-weight: 400;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--ink-2);
}
.chapter--black .eyebrow { color: var(--on-dark-muted); }
.nowrap { white-space: nowrap; }

.section-head { max-width: 40rem; }   /* 标题容器：~640px，让大标题落 1-2 行而非细长堆叠 */
.section-title {
  font-family: var(--f-display);
  font-weight: 600;
  font-size: clamp(30px, 4.4vw, 48px);
  line-height: 1.07;
  letter-spacing: -0.02em;
}
.section-sub {
  margin-top: 18px;
  max-width: 60ch;
  font-size: clamp(18px, 2vw, 21px);
  line-height: 1.42;
  color: var(--ink-2);
}
.chapter--black .section-sub { color: var(--on-dark-muted); }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 48px;
  padding-inline: 26px;
  border-radius: var(--r-pill);
  font-size: 16px;
  font-weight: 500;
  letter-spacing: -0.01em;
  transition: background .2s ease, color .2s ease, border-color .2s ease, transform .15s ease;
  white-space: nowrap;
}
.btn:active { transform: scale(.985); }

.btn--blue { background: var(--blue); color: #fff; }
.btn--blue:hover { background: var(--blue-hover); }

.btn--dark { background: var(--ink); color: #fff; }
.btn--dark:hover { background: #000; }

.btn--ghost {
  background: transparent;
  color: var(--ink);
  border: 1px solid var(--border-2);
}
.btn--ghost:hover { border-color: var(--ink); }

/* ghost on dark chapters */
.chapter--black .btn--ghost {
  color: var(--on-dark);
  border-color: var(--on-dark-border);
}
.chapter--black .btn--ghost:hover { border-color: var(--on-dark); }

.btn--sm { height: 40px; padding-inline: 18px; font-size: 15px; }

/* text / arrow link */
.link {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  color: var(--blue);
  font-weight: 500;
  font-size: 16px;
  letter-spacing: -0.01em;
}
.link .arw { transition: transform .2s ease; }
.link:hover .arw { transform: translateX(3px); }
.chapter--black .link { color: var(--blue-bright); }

/* ============================================================
   Nav
   ============================================================ */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255,255,255,0.72);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 1px solid var(--border);
}
.nav__inner {
  height: var(--nav-h);
  max-width: var(--core);
  margin-inline: auto;
  padding-inline: var(--gutter);
  display: flex;
  align-items: center;
  gap: 28px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 9px;
  font-family: var(--f-display);
  font-weight: 600;
  font-size: 20px;
  letter-spacing: -0.02em;
  color: var(--ink);
  white-space: nowrap;
  flex-shrink: 0;
}
.brand__logo {
  display: block;
  height: 22px;
  width: auto;
}

.nav__links {
  display: flex;
  align-items: center;
  gap: 4px;
  margin-left: 8px;
  flex: 1;
}
.nav__item { position: relative; }
.nav__link {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 8px 12px;
  font-size: 14px;
  font-weight: 400;
  color: var(--ink);
  border-radius: var(--r-tag);
  white-space: nowrap;
  transition: color .15s ease;
}
.nav__link:hover { color: var(--blue); }
.nav__link[aria-current="page"] { color: var(--ink); font-weight: 500; }
.nav__caret { width: 9px; height: 9px; opacity: .55; transition: transform .2s ease; }

/* dropdown */
.nav__menu {
  position: absolute;
  top: calc(100% + 10px);
  left: 0;
  min-width: 186px;
  padding: 8px;
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--r-card);
  box-shadow: 0 12px 34px rgba(0,0,0,.12);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-6px);
  transition: opacity .18s ease, transform .18s ease, visibility .18s;
}
.nav__item:hover > .nav__menu,
.nav__item:focus-within > .nav__menu {
  opacity: 1; visibility: visible; transform: translateY(0);
}
.nav__item:hover .nav__caret { transform: rotate(180deg); }
.nav__menu a {
  display: block;
  padding: 9px 12px;
  font-size: 14px;
  color: var(--ink);
  border-radius: 8px;
  transition: background .14s ease, color .14s ease;
}
.nav__menu a:hover { background: var(--paper); color: var(--blue); }

.nav__right { margin-left: auto; display: flex; align-items: center; gap: 12px; }

/* hamburger */
.nav__burger {
  display: none;
  width: 40px; height: 40px;
  align-items: center; justify-content: center;
  border-radius: var(--r-control);
  margin-left: auto;
}
.nav__burger span,
.nav__burger span::before,
.nav__burger span::after {
  content: "";
  display: block;
  width: 19px; height: 1.5px;
  background: var(--ink);
  transition: transform .25s ease, opacity .2s ease;
}
.nav__burger span { position: relative; }
.nav__burger span::before { position: absolute; top: -6px; left: 0; }
.nav__burger span::after  { position: absolute; top:  6px; left: 0; }
body.menu-open .nav__burger span { background: transparent; }
body.menu-open .nav__burger span::before { transform: translateY(6px) rotate(45deg); }
body.menu-open .nav__burger span::after  { transform: translateY(-6px) rotate(-45deg); }

/* mobile drawer */
.drawer {
  position: fixed;
  inset: var(--nav-h) 0 0 0;
  z-index: 90;
  background: var(--white);
  padding: 18px var(--gutter) 40px;
  overflow-y: auto;
  transform: translateX(100%);
  transition: transform .3s cubic-bezier(.4,0,.2,1);
  visibility: hidden;
}
body.menu-open .drawer { transform: translateX(0); visibility: visible; }
.drawer a {
  display: block;
  padding: 16px 2px;
  font-size: 21px;
  font-family: var(--f-display);
  font-weight: 500;
  letter-spacing: -0.01em;
  color: var(--ink);
  border-bottom: 1px solid var(--border);
}
.drawer .drawer__sub a {
  font-family: var(--f-body);
  font-size: 16px;
  font-weight: 400;
  padding: 11px 2px 11px 16px;
  color: var(--ink-2);
}
.drawer__cta { margin-top: 28px; }
.drawer__cta .btn { width: 100%; }

/* ============================================================
   Hero (black chapter)
   ============================================================ */
.hero { padding-top: clamp(64px, 10vw, 120px); }
.hero__h1 {
  font-family: var(--f-display);
  font-weight: 600;
  font-size: clamp(40px, 7.2vw, 80px);
  line-height: 1.03;
  letter-spacing: -0.025em;
  max-width: 17ch;
}
.hero__sub {
  margin-top: 26px;
  max-width: 56ch;
  font-size: clamp(18px, 2.2vw, 22px);
  line-height: 1.45;
  color: var(--on-dark-muted);
}
.hero__cta {
  margin-top: 38px;
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  align-items: center;
}
.hero__media { margin-top: clamp(48px, 7vw, 88px); padding-bottom: clamp(56px, 8vw, 100px); }

/* ============================================================
   Image placeholder frames
   ============================================================ */
.ph {
  position: relative;
  width: 100%;
  border-radius: var(--r-card);
  overflow: hidden;
  background:
    linear-gradient(135deg, #ededf0 0%, #f5f5f7 46%, #e7e7ea 100%);
  border: 1px solid var(--border);
  display: grid;
  place-items: center;
  isolation: isolate;
}
/* faint registration grid so the slot reads as 'image goes here', intentional */
.ph::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(0,0,0,.035) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(0,0,0,.035) 1px, transparent 1px);
  background-size: 44px 44px;
  z-index: -1;
}
.ph__cap {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 14px;
  background: rgba(255,255,255,.78);
  border: 1px solid var(--border);
  border-radius: var(--r-pill);
  font-family: var(--f-mono);
  font-size: 11.5px;
  letter-spacing: 0.02em;
  color: var(--ink-2);
  backdrop-filter: blur(4px);
}
.ph__cap::before {
  content: "";
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--border-2);
}
/* dark variant for graphite scenes */
.ph--dark {
  background: linear-gradient(135deg, #222224 0%, #2a2a2c 50%, #1c1c1e 100%);
  border-color: var(--on-dark-border);
}
.ph--dark::before {
  background-image:
    linear-gradient(to right, rgba(255,255,255,.045) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255,255,255,.045) 1px, transparent 1px);
}
.ph--dark .ph__cap {
  background: rgba(0,0,0,.4);
  border-color: var(--on-dark-border);
  color: var(--on-dark-muted);
}
.ph--dark .ph__cap::before { background: var(--blue-bright); }

/* aspect helpers */
.ph--hero  { aspect-ratio: 16 / 9; border-radius: var(--r-spot); }
.ph--wide  { aspect-ratio: 16 / 10; }
.ph--card  { aspect-ratio: 4 / 3; }
.ph--tall  { aspect-ratio: 3 / 4; }
/* showcase：整幅展示图(白底产品合影 / 信息图),完整显示不裁切、去占位网格与边框;aspect-ratio 由行内按图设定 */
.ph--showcase { border: 0; background: #fff; }
.ph--showcase::before { display: none; }
.ph--showcase .ph__img { object-fit: contain; padding: 0; }
.ph--sq    { aspect-ratio: 1 / 1; }

/* ============================================================
   Number wall
   ============================================================ */
.stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: clamp(28px, 4vw, 56px) clamp(24px, 3vw, 40px);
}
.stat { border-top: 1px solid var(--border); padding-top: 22px; }
.stat__n {
  font-family: var(--f-display);
  font-weight: 600;
  font-size: clamp(40px, 5.6vw, 66px);
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--ink);
}
.stat__l {
  margin-top: 12px;
  font-size: 15px;
  line-height: 1.4;
  color: var(--ink-2);
}
.stat__l strong { color: var(--ink); font-weight: 600; display: block; font-size: 16px; }

/* ============================================================
   Why-us feature points
   ============================================================ */
.feature-grid {
  margin-top: clamp(48px, 6vw, 72px);
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(32px, 4vw, 48px);
}
.feature {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 18px;
}
.feature__num {
  font-family: var(--f-mono);
  font-size: 13px;
  color: var(--border-2);
  padding-top: 5px;
}
.feature__t {
  font-family: var(--f-display);
  font-weight: 600;
  font-size: clamp(21px, 2.4vw, 26px);
  line-height: 1.14;
  letter-spacing: -0.018em;
  color: var(--blue);
}
.feature__d {
  margin-top: 12px;
  font-size: 17px;
  line-height: 1.5;
  color: var(--ink-2);
}
.feature__d strong { color: var(--ink); font-weight: 600; }

/* ============================================================
   Module entries (product lines)
   ============================================================ */
.modules { margin-top: clamp(44px, 5vw, 64px); }

/* flagship feature card */
.flag {
  display: grid;
  grid-template-columns: 1.05fr 1fr;
  gap: clamp(24px, 4vw, 56px);
  align-items: center;
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--r-spot);
  padding: clamp(24px, 3vw, 40px);
  margin-bottom: clamp(20px, 2.6vw, 32px);
}
.flag__body { padding: clamp(8px, 2vw, 24px) clamp(8px, 1.5vw, 20px); }
.flag__badge {
  display: inline-block;
  font-family: var(--f-mono);
  font-size: 11px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--ink);
  border: 1px solid var(--border-2);
  border-radius: var(--r-tag);
  padding: 4px 9px;
  margin-bottom: 18px;
}
.flag__t {
  font-family: var(--f-display);
  font-weight: 600;
  font-size: clamp(30px, 3.6vw, 44px);
  line-height: 1.05;
  letter-spacing: -0.022em;
}
.flag__d {
  margin-top: 16px;
  max-width: 46ch;
  font-size: 18px;
  line-height: 1.5;
  color: var(--ink-2);
}
.flag__link { margin-top: 24px; }
.flag .ph { border-radius: var(--r-card); }

/* secondary module cards */
.mod-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: clamp(20px, 2.4vw, 28px);
}
/* two-card variant (Classic AIO: FHD / QHD only) — wider, balanced pair */
.mod-grid--two { grid-template-columns: repeat(2, 1fr); }
.mod {
  display: flex;
  flex-direction: column;
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--r-card);
  overflow: hidden;
  transition: transform .2s ease, box-shadow .25s ease;
}
.mod:hover { transform: translateY(-4px); box-shadow: 0 16px 40px rgba(0,0,0,.10); }
.mod .ph { border-radius: 0; border: 0; border-bottom: 1px solid var(--border); }
.mod__body { padding: 22px 22px 24px; display: flex; flex-direction: column; flex: 1; }
.mod__t {
  font-family: var(--f-display);
  font-weight: 600;
  font-size: 22px;
  letter-spacing: -0.018em;
}
.mod__d { margin-top: 8px; font-size: 15.5px; line-height: 1.45; color: var(--ink-2); flex: 1; }
.mod__link { margin-top: 18px; font-size: 15px; }

/* ============================================================
   Modular statement (black cinematic)
   ============================================================ */
.statement { text-align: center; }
.statement__t {
  font-family: var(--f-display);
  font-weight: 600;
  font-size: clamp(40px, 7vw, 88px);
  line-height: 1.02;
  letter-spacing: -0.03em;
  max-width: 18ch;
  margin-inline: auto;
  text-wrap: balance;
}
.statement__sub {
  margin: 24px auto 0;
  max-width: 52ch;
  font-size: clamp(18px, 2.2vw, 22px);
  line-height: 1.45;
  color: var(--on-dark-muted);
}
.statement__media { margin-top: clamp(48px, 6vw, 80px); }

/* ============================================================
   Industry scenarios
   ============================================================ */
.scenarios {
  margin-top: clamp(44px, 5vw, 64px);
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: clamp(24px, 3vw, 36px);
}
.scenario {
  display: flex;
  flex-direction: column;
  border-radius: var(--r-spot);
  overflow: hidden;
  border: 1px solid var(--border);
  background: var(--white);
}
.scenario .ph { border-radius: 0; border: 0; border-bottom: 1px solid var(--border); }
.scenario__body { padding: clamp(24px, 3vw, 36px); }
.scenario__tag {
  font-family: var(--f-mono);
  font-size: 12px;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  color: var(--ink-2);
}
.scenario__t {
  margin-top: 10px;
  font-family: var(--f-display);
  font-weight: 600;
  font-size: clamp(24px, 3vw, 32px);
  letter-spacing: -0.02em;
}
.scenario__d {
  margin-top: 12px;
  font-size: 17px;
  line-height: 1.5;
  color: var(--ink-2);
}
.scenario__link { margin-top: 20px; }

/* ============================================================
   CTA band
   ============================================================ */
.cta-band {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: clamp(18px, 3vw, 36px);
  text-align: center;
}
.cta-band__t {
  font-family: var(--f-display);
  font-weight: 600;
  font-size: clamp(18px, 2.2vw, 22px);
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin: 0;
  /* 原图 + 黑字，不加暗罩/投影 */
  color: var(--ink);
}
.cta-band__row {
  margin-top: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  justify-content: center;
}

/* ============================================================
   Footer
   ============================================================ */
.footer { background: var(--paper); color: var(--ink); border-top: 1px solid var(--border); }
.footer__top {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr 1fr;
  gap: clamp(32px, 4vw, 56px);
  padding-block: clamp(56px, 7vw, 80px);
}
.footer__brand .brand { font-size: 22px; }
.footer__brand .brand__logo { height: 26px; }
.footer__about {
  margin-top: 16px;
  max-width: 34ch;
  font-size: 14px;
  line-height: 1.5;
  color: var(--ink-2);
}
.footer__social { display: flex; gap: 10px; margin-top: 20px; }
.footer__social a {
  display: inline-flex; align-items: center; justify-content: center;
  width: 38px; height: 38px; border-radius: 50%;
  border: 1px solid var(--border); color: var(--ink-2);
  transition: color .18s ease, background .18s ease, border-color .18s ease;
}
.footer__social a:hover { color: #fff; background: var(--blue); border-color: var(--blue); }
.footer__social svg { width: 18px; height: 18px; fill: currentColor; display: block; }
.footer__col h4 {
  font-size: 13px;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 14px;
}
.footer__col ul { display: grid; gap: 11px; }
.footer__col a {
  font-size: 14px;
  color: var(--ink-2);
  transition: color .15s ease;
}
.footer__col a:hover { color: var(--blue); }
.footer__col .muted { font-size: 14px; color: var(--ink-2); line-height: 1.5; }

.footer__bar {
  border-top: 1px solid var(--border);
  padding-block: 24px;
  display: flex;
  flex-wrap: wrap;
  gap: 16px 28px;
  align-items: center;
  justify-content: space-between;
}
.footer__marks { display: flex; flex-wrap: wrap; gap: 14px; align-items: center; }
.mark {
  font-family: var(--f-mono);
  font-size: 11px;
  letter-spacing: 0.05em;
  color: var(--ink-2);
  border: 1px solid var(--border);
  border-radius: var(--r-tag);
  padding: 4px 9px;
}
.footer__note { font-family: var(--f-mono); font-size: 11px; color: var(--border-2); }
.footer__legal { display: flex; flex-wrap: wrap; gap: 8px 18px; font-size: 13px; color: var(--ink-2); }
.footer__legal a:hover { color: var(--blue); }

/* ============================================================
   Responsive
   ============================================================ */
@media (max-width: 1024px) {
  .nav__links { display: none; }
  .nav__right .btn { display: none; }
  .nav__burger { display: flex; }
  .mod-grid { grid-template-columns: repeat(2, 1fr); }
  .flag { grid-template-columns: 1fr; }
  .flag__body { padding: 6px 4px 4px; order: 2; }
  .flag .ph { order: 1; }
}

@media (max-width: 833px) {
  .feature-grid { gap: 40px; }
}

@media (max-width: 768px) {
  :root { --nav-h: 50px; }
  .stats { grid-template-columns: repeat(2, 1fr); }
  .feature-grid { grid-template-columns: 1fr; }
  .scenarios { grid-template-columns: 1fr; }
  .mod-grid, .mod-grid--two { grid-template-columns: 1fr; }
  .footer__top { grid-template-columns: 1fr 1fr; }
  .footer__brand { grid-column: 1 / -1; }
  .hero__cta .btn, .hero__cta .link { width: auto; }
}

@media (max-width: 460px) {
  .stats { grid-template-columns: 1fr; }
  .footer__top { grid-template-columns: 1fr; }
  .hero__cta { flex-direction: column; align-items: stretch; }
  .hero__cta .btn { width: 100%; }
  .hero__cta .link { justify-content: center; padding: 8px; }
  .cta-band__row { flex-direction: column; }
  .cta-band__row .btn { width: 100%; }
}

/* ============================================================
   Hero banner carousel
   ============================================================ */
.hero2 { padding: 0; }
/* 主页 hero 文案窄带：背景带独立承载 R2 渐变图，100% 100% 整幅铺满不裁切（渐变拉伸无失真、完整显色阶） */
.hero2__band { background-size: 100% 100%; }
.carousel { position: relative; width: 100%; overflow: hidden; background: #0a0e1a; }
.carousel__track { display: flex; transition: transform .6s cubic-bezier(.4,0,.2,1); }
.carousel__slide { flex: 0 0 100%; display: block; position: relative; }
.carousel__slide img { width: 100%; height: auto; display: block; aspect-ratio: 1920 / 900; object-fit: cover; }
/* 轮播 CTA 按钮：玻璃拟态，浮于图片左下角；仅此按钮可点。随 slide 激活渐入 + 上浮，形成随轮播切换的效果 */
.carousel__cta {
  position: absolute; left: clamp(18px, 5vw, 64px); bottom: clamp(18px, 5vw, 64px); z-index: 4;
  display: inline-flex; align-items: center; gap: 9px; height: 52px; padding-inline: 28px;
  border-radius: var(--r-pill); font-family: var(--f-display); font-weight: 500; font-size: 16px; letter-spacing: -0.01em;
  color: #fff; background: rgba(255,255,255,.14); border: 1px solid rgba(255,255,255,.5);
  backdrop-filter: blur(12px) saturate(160%); -webkit-backdrop-filter: blur(12px) saturate(160%);
  box-shadow: 0 8px 30px rgba(0,0,0,.22);
  opacity: 0; transform: translateY(16px);
  transition: opacity .5s ease, transform .55s cubic-bezier(.2,.7,.2,1), background .25s ease, border-color .25s ease, box-shadow .25s ease;
  will-change: opacity, transform;
}
.carousel__cta:hover { background: rgba(255,255,255,.26); border-color: #fff; box-shadow: 0 10px 36px rgba(0,0,0,.3); }
.carousel__cta:active { transform: translateY(0) scale(.98); }
.carousel__cta .arw { transition: transform .2s ease; }
.carousel__cta:hover .arw { transform: translateX(4px); }
.carousel__slide.is-active .carousel__cta { opacity: 1; transform: translateY(0); transition-delay: .28s, .28s, 0s, 0s, 0s; }
@media (max-width: 640px) {
  .carousel__cta { height: 44px; padding-inline: 20px; font-size: 14px; left: 16px; bottom: 44px; }
}
.carousel__arrow {
  position: absolute; top: 50%; transform: translateY(-50%);
  width: 46px; height: 46px; border-radius: 50%;
  background: rgba(0,0,0,.32); color: #fff; font-size: 26px; line-height: 1;
  display: flex; align-items: center; justify-content: center;
  z-index: 3; transition: background .2s ease; backdrop-filter: blur(2px);
}
.carousel__arrow:hover { background: rgba(0,0,0,.6); }
.carousel__arrow--prev { left: 18px; }
.carousel__arrow--next { right: 18px; }
.carousel__dots { position: absolute; bottom: 16px; left: 0; right: 0; display: flex; gap: 8px; justify-content: center; z-index: 3; }
.carousel__dots button { width: 9px; height: 9px; border-radius: 50%; background: rgba(255,255,255,.45); transition: background .2s ease, width .2s ease; }
.carousel__dots button.is-active { background: #fff; width: 26px; border-radius: 5px; }

.hero2__copy { text-align: center; padding-block: clamp(36px, 5vw, 64px); }
.hero2__h1 {
  font-family: var(--f-display); font-weight: 600; color: var(--ink);
  font-size: clamp(30px, 4.6vw, 54px); line-height: 1.05; letter-spacing: -0.02em;
  margin-top: 12px; max-width: 22ch; margin-inline: auto; text-wrap: balance;
}
.hero2__sub { max-width: 60ch; margin: 18px auto 0; font-size: clamp(17px, 2vw, 20px); line-height: 1.5; color: var(--ink-2); }
.hero2 .hero__cta { justify-content: center; margin-top: 28px; }

@media (max-width: 600px) {
  /* banner 是 16:5 超宽，窄屏保持原生比例：整图不裁（不切左侧文字），只是高度较矮 */
  .carousel__arrow { width: 36px; height: 36px; font-size: 20px; }
  .carousel__dots { bottom: 10px; }
}

@media (prefers-reduced-motion: reduce) {
  * { scroll-behavior: auto; }
  .carousel__track { transition: none; }
}