:root {
  color-scheme: dark;  /* 声明深色页面,防移动端浏览器强制反色成浅底 */
  --orange: #ff6900;
  --orange-dark: #d4540a;
  --orange-soft: rgba(255, 105, 0, 0.1);
  --ink: #0a0a0a;
  --label: #1d1d1f;
  --secondary: #6e6e73;
  --tertiary: #86868b;
  --white: #fff;
  --surface: #f7f6f3;
  --surface-strong: #eeeae4;
  --line: rgba(34, 28, 22, 0.12);
  --font-display: "SF Pro Display", "SF Pro SC", -apple-system, BlinkMacSystemFont, "PingFang SC", "Helvetica Neue", Arial, sans-serif;
  --font-text: "SF Pro Text", "SF Pro SC", -apple-system, BlinkMacSystemFont, "PingFang SC", "Helvetica Neue", Arial, sans-serif;
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-spring: cubic-bezier(0.32, 0.72, 0, 1);
  /* 弹窗动画用(与 style.css 一致,modals-css partial 依赖) */
  --ease-out-spring: cubic-bezier(0.32, 0.72, 0.0, 1.0);
  --ease-out-soft:   cubic-bezier(0.16, 1, 0.3, 1);
  --ease-out-back:   cubic-bezier(0.34, 1.56, 0.64, 1);
  --nav-height: 76px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; scroll-padding-top: calc(var(--nav-height) + 24px); }
body {
  min-width: 320px;
  color: var(--label);
  background: var(--white);
  font-family: var(--font-text);
  font-kerning: normal;
  font-optical-sizing: auto;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
body.nav-open { overflow: hidden; }
img, video { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { color: inherit; font: inherit; }

.solution-page h1,
.solution-page h2,
.solution-page h3,
.solution-page h4 {
  font-family: var(--font-display);
  font-optical-sizing: auto;
  text-wrap: balance;
}
.solution-page p { text-wrap: pretty; }
.solution-container { width: min(calc(100% - 40px), 1360px); margin-inline: auto; }
.solution-narrow { width: min(calc(100% - 40px), 920px); margin-inline: auto; }

.scroll-progress {
  position: fixed;
  inset: 0 auto auto 0;
  z-index: 1200;
  width: var(--scroll-progress, 0%);
  height: 2px;
  background: var(--orange);
  pointer-events: none;
}

.solution-nav {
  position: fixed;
  inset: 0 0 auto;
  z-index: 1100;
  height: var(--nav-height);
  color: var(--label);
  background: rgba(255, 255, 255, 0.62);
  border-bottom: 1px solid rgba(255, 255, 255, 0.36);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  transition: background 240ms ease, box-shadow 240ms ease;
}
.solution-nav.is-scrolled {
  background: rgba(255, 255, 255, 0.85);
  box-shadow: 0 10px 34px rgba(33, 25, 18, 0.08);
}
.nav-inner {
  width: min(calc(100% - 20px), 1280px); /* 与主页 .navbar-container 一致:1280px + 左右 10px */
  height: 100%;
  margin-inline: auto;
  display: flex;
  align-items: center;
  gap: 32px;
}
.solution-brand {
  display: inline-flex;
  align-items: center;
  gap: 4px; /* 与主页 .navbar-left 一致 */
  flex: 0 0 auto;
  font-family: var(--font-display);
  font-size: 21px;       /* 与主页 .brand-text 一致(1.3125rem) */
  font-weight: 650;
  letter-spacing: -0.025em;
}
.solution-brand img { height: 34px; width: auto; object-fit: contain; } /* 与主页 logo 高度一致 */
.solution-links {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 32px; /* 与主页 .nav-links 一致 */
}
.solution-links a {
  position: relative;
  padding: 10px 0;
  color: rgba(29, 29, 31, 0.78);
  font-size: 16px;          /* 与主页 .nav-links 一致 */
  font-weight: 520;         /* 与主页一致(.home-page 覆盖值) */
  letter-spacing: -0.005em;
  transition: color 160ms ease;
}
.solution-links a::after {
  content: "";
  position: absolute;
  right: 0;
  bottom: 3px;
  left: 0;
  height: 2px;
  border-radius: 99px;
  background: var(--orange);
  transform: scaleX(0);
  transition: transform 220ms var(--ease-spring);
}
.solution-links a:hover,
.solution-links a.is-active { color: var(--orange-dark); }
.solution-links a:hover::after,
.solution-links a.is-active::after { transform: scaleX(1); }
.nav-return {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 38px;
  padding: 0 16px;
  flex: 0 0 auto;
  border: 1px solid rgba(34, 28, 22, 0.14);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.66);
  color: var(--label);
  font-size: 13px;
  font-weight: 600;
  transition: color 180ms ease, border-color 180ms ease, background 180ms ease, transform 100ms ease;
}
.nav-return:hover { color: var(--orange-dark); border-color: rgba(255, 105, 0, 0.36); background: var(--orange-soft); }
.nav-return:active { transform: scale(0.96); }
.nav-toggle {
  display: none;
  width: 42px;
  height: 42px;
  margin-left: auto;
  border: 0;
  border-radius: 50%;
  background: rgba(29, 29, 31, 0.06);
  cursor: pointer;
}
.nav-toggle span,
.nav-toggle span::before,
.nav-toggle span::after {
  display: block;
  width: 18px;
  height: 1.5px;
  margin: auto;
  background: var(--label);
  transition: transform 220ms var(--ease-spring), opacity 160ms ease;
}
.nav-toggle span { position: relative; }
.nav-toggle span::before,
.nav-toggle span::after { content: ""; position: absolute; left: 0; }
.nav-toggle span::before { top: -6px; }
.nav-toggle span::after { top: 6px; }
body.nav-open .nav-toggle span { background: transparent; }
body.nav-open .nav-toggle span::before { top: 0; transform: rotate(45deg); }
body.nav-open .nav-toggle span::after { top: 0; transform: rotate(-45deg); }

.solution-hero {
  position: relative;
  min-height: min(920px, 100svh);
  padding: calc(var(--nav-height) + 92px) 0 94px;
  display: flex;
  align-items: center;
  overflow: hidden;
  isolation: isolate;
  color: #fff;
  background: var(--ink);
}
.hero-bg,
.hero-scrim { position: absolute; inset: 0; z-index: -2; }
.hero-bg { background: center / cover no-repeat; transform: scale(1.01); }
.hero-scrim {
  z-index: -1;
  background:
    linear-gradient(90deg, rgba(10, 10, 10, 0.94) 0%, rgba(10, 10, 10, 0.78) 44%, rgba(10, 10, 10, 0.22) 74%, rgba(10, 10, 10, 0.38) 100%),
    linear-gradient(180deg, rgba(10, 10, 10, 0.18), rgba(10, 10, 10, 0.72));
}
.hero-grid {
  width: min(calc(100% - 40px), 1360px);
  margin-inline: auto;
  display: grid;
  grid-template-columns: minmax(0, 0.94fr) minmax(380px, 0.86fr);
  align-items: center;
  gap: clamp(48px, 7vw, 120px);
}
.hero-copy { max-width: 780px; position: relative; z-index: 2; }
.eyebrow,
.section-kicker {
  color: #ff9c5b;
  font-size: 12px;
  font-weight: 720;
  line-height: 1.4;
  letter-spacing: 0.17em;
  text-transform: uppercase;
}
.hero-copy h1 {
  max-width: 12ch;
  margin-top: 20px;
  color: #fff;
  font-size: clamp(54px, 6.4vw, 96px);
  font-weight: 740;
  line-height: 0.98;
  letter-spacing: -0.055em;
}
.hero-copy .hero-subtitle {
  margin-top: 24px;
  color: rgba(255, 255, 255, 0.92);
  font-family: var(--font-display);
  font-size: clamp(24px, 2.5vw, 38px);
  font-weight: 590;
  line-height: 1.18;
  letter-spacing: -0.035em;
}
.hero-copy .hero-lead {
  max-width: 680px;
  margin-top: 24px;
  color: rgba(255, 255, 255, 0.7);
  font-size: clamp(17px, 1.45vw, 21px);
  line-height: 1.7;
  letter-spacing: -0.01em;
}
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 38px; }
/* lm-btn 场景:按钮盒顶部有 42px 辉光留白,文案与首按钮的视觉间距收窄 */
.solution-hero .hero-actions:has(.lm-btn) { margin-top: 6px; }
.solution-hero .hero-actions:has(.lm-btn) + .hero-stats { margin-top: 18px; } /* 末按钮盒底辉光留白已占 20px,参数区上边距相应收窄 */
.solution-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 48px;
  padding: 0 24px;
  border: 1px solid transparent;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 620;
  letter-spacing: -0.01em;
  cursor: pointer;
  transition: transform 100ms ease, background 180ms ease, border-color 180ms ease, color 180ms ease, box-shadow 180ms ease;
}
.solution-button.primary { color: #fff; background: var(--orange); box-shadow: 0 12px 28px -14px rgba(255, 105, 0, 0.9); }
.solution-button.primary:hover { background: var(--orange-dark); transform: translateY(-1px); }
.solution-button.secondary { color: #fff; border-color: rgba(255, 255, 255, 0.28); background: rgba(255, 255, 255, 0.08); backdrop-filter: blur(10px); }
.solution-button.secondary:hover { border-color: rgba(255, 255, 255, 0.5); background: rgba(255, 255, 255, 0.14); }
.solution-button.light { color: var(--orange-dark); background: #fff; }
.solution-button:active { transform: scale(0.97); }
.hero-stats {
  margin-top: 56px;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1px;
  border-top: 1px solid rgba(255, 255, 255, 0.17);
}
.hero-stat { padding: 22px 18px 0 0; }
.hero-stat strong {
  display: block;
  color: #fff;
  font-family: var(--font-display);
  font-size: clamp(23px, 2.1vw, 32px);
  font-weight: 680;
  line-height: 1;
  letter-spacing: -0.045em;
  white-space: nowrap;
}
.hero-stat span { display: block; margin-top: 9px; color: rgba(255, 255, 255, 0.48); font-size: 11px; font-weight: 620; letter-spacing: 0.1em; }
.hero-visual { position: relative; min-height: 620px; }
.hero-product {
  position: absolute;
  filter: drop-shadow(0 42px 70px rgba(0, 0, 0, 0.45));
  transform-origin: center;
}
.hero-product.primary { width: min(100%, 620px); right: -2%; bottom: -7%; }
.hero-product.secondary { width: min(60%, 390px); left: -8%; bottom: 2%; opacity: 0.82; }
.hero-product.ecosystem { width: min(72%, 520px); right: 0; top: -2%; opacity: 0.18; filter: grayscale(1); }
.hero-scroll {
  position: absolute;
  right: 50%;
  bottom: 24px;
  display: flex;
  align-items: center;
  gap: 9px;
  color: rgba(255, 255, 255, 0.5);
  font-size: 11px;
  font-weight: 620;
  letter-spacing: 0.1em;
  transform: translateX(50%);
}
.hero-scroll::after { content: "↓"; color: #fff; font-size: 17px; }

.solution-section { padding: clamp(104px, 10vw, 156px) 0; background: #fff; }
.solution-section.soft { background: var(--surface); }
.solution-section.dark { color: #fff; background: var(--ink); }
.section-header { max-width: 900px; margin-bottom: clamp(58px, 7vw, 92px); }
.section-header.center { margin-inline: auto; text-align: center; }
.section-header h2 {
  margin-top: 16px;
  color: var(--label);
  font-size: clamp(42px, 5.2vw, 72px);
  font-weight: 720;
  line-height: 1.04;
  letter-spacing: -0.05em;
}
.section-header p {
  max-width: 760px;
  margin-top: 24px;
  color: var(--secondary);
  font-size: clamp(17px, 1.5vw, 21px);
  line-height: 1.72;
  letter-spacing: -0.01em;
}
.section-header.center p { margin-inline: auto; }
.dark .section-header h2 { color: #fff; }
.dark .section-header p { color: rgba(255, 255, 255, 0.62); }

.feature-columns { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: clamp(34px, 5vw, 70px); }
.feature-column { position: relative; padding-top: 28px; border-top: 1px solid var(--line); }
.feature-column::before { content: ""; position: absolute; top: -1px; left: 0; width: 58px; height: 2px; background: var(--orange); }
.feature-number { color: var(--orange); font-size: 11px; font-weight: 700; letter-spacing: 0.1em; }
.feature-column h3 { margin-top: 28px; font-size: clamp(25px, 2.3vw, 34px); font-weight: 670; line-height: 1.13; letter-spacing: -0.04em; }
.feature-column p { margin-top: 16px; color: var(--secondary); font-size: 16px; line-height: 1.75; }
.feature-column ul { margin-top: 20px; list-style: none; }
.feature-column li { position: relative; padding-left: 14px; color: var(--secondary); font-size: 15px; line-height: 1.7; }
.feature-column li + li { margin-top: 7px; }
.feature-column li::before { content: ""; position: absolute; top: 0.72em; left: 0; width: 4px; height: 4px; border-radius: 50%; background: var(--orange); }
.dark .feature-column { border-top-color: rgba(255, 255, 255, 0.16); }
.dark .feature-column h3 { color: #fff; }
.dark .feature-column p,
.dark .feature-column li { color: rgba(255, 255, 255, 0.58); }

.solution-split { display: grid; grid-template-columns: minmax(0, 1.06fr) minmax(0, 0.94fr); gap: clamp(50px, 7vw, 110px); align-items: center; }
.solution-split.reverse .solution-media { order: 2; }
.solution-media { position: relative; overflow: hidden; border-radius: 24px; background: var(--surface-strong); }
/* 轮播(SG100 四构型海报) */
.solution-media.carousel { aspect-ratio: 3 / 4; }
.solution-media.carousel--wide { aspect-ratio: 16 / 10; }
.carousel-track { display: flex; height: 100%; transition: transform 600ms cubic-bezier(0.22, 0.61, 0.36, 1); }
.carousel-track picture { flex: 0 0 100%; height: 100%; }
.carousel-track img { width: 100%; height: 100%; min-height: 0; object-fit: cover; display: block; }
.carousel-btn {
  position: absolute; top: 50%; transform: translateY(-50%); z-index: 3;
  width: 42px; height: 42px; border-radius: 50%; border: 1px solid rgba(255, 255, 255, 0.25);
  background: rgba(10, 10, 10, 0.45); color: #fff; font-size: 20px; line-height: 1;
  backdrop-filter: blur(8px); opacity: 0; transition: opacity 250ms, background 250ms;
}
.carousel:hover .carousel-btn, .carousel:focus-within .carousel-btn { opacity: 1; }
@media (hover: none) { .carousel-btn { opacity: 1; } }
.carousel-btn.prev { left: 14px; }
.carousel-btn.next { right: 14px; }
.carousel-btn:hover { background: rgba(255, 105, 0, 0.85); }
.carousel-dots { position: absolute; left: 50%; bottom: 16px; transform: translateX(-50%); display: flex; gap: 8px; z-index: 3; }
.carousel-dot { width: 8px; height: 8px; border-radius: 50%; border: none; padding: 0; background: rgba(255, 255, 255, 0.35); transition: background 250ms, transform 250ms; }
.carousel-dot.active { background: #fff; transform: scale(1.3); }
/* 场景列配图(feature-column 底部) */
.fc-img { margin-top: 24px; border-radius: 14px; overflow: hidden; aspect-ratio: 4 / 3; background: var(--surface-strong); }
.fc-img img { width: 100%; height: 100%; object-fit: cover; display: block; transition: transform 500ms cubic-bezier(0.22, 0.61, 0.36, 1); }
.feature-column:hover .fc-img img { transform: scale(1.04); }
.solution-media img { width: 100%; min-height: 420px; object-fit: cover; }
.solution-media.contain img { padding: clamp(20px, 3vw, 44px); object-fit: contain; background: #fff; }
.media-label { position: absolute; right: 16px; bottom: 16px; padding: 8px 12px; border-radius: 999px; color: rgba(255,255,255,.88); background: rgba(10,10,10,.62); backdrop-filter: blur(12px); font-size: 11px; font-weight: 650; letter-spacing: .08em; }
.copy-block .section-kicker { color: var(--orange-dark); }
.copy-block h2 { margin-top: 16px; font-size: clamp(38px, 4.2vw, 62px); font-weight: 720; line-height: 1.04; letter-spacing: -0.05em; }
.copy-block h3 { margin-top: 28px; font-size: clamp(23px, 2.2vw, 32px); font-weight: 650; line-height: 1.2; letter-spacing: -0.035em; }
.copy-block > p { margin-top: 22px; color: var(--secondary); font-size: clamp(16px, 1.4vw, 19px); line-height: 1.76; }
.copy-list { margin-top: 30px; display: grid; gap: 16px; list-style: none; }
.copy-list li { display: grid; grid-template-columns: 24px 1fr; gap: 12px; color: var(--secondary); font-size: 16px; line-height: 1.65; }
.copy-list li::before { content: "✓"; color: var(--orange); font-weight: 750; }

.comparison-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 22px; margin-top: 34px; }
.comparison-item { padding: 22px 0; border-top: 1px solid var(--line); }
.comparison-item span { color: var(--tertiary); font-size: 12px; font-weight: 650; letter-spacing: .06em; }
.comparison-item strong { display: block; margin-top: 10px; color: var(--label); font-size: 18px; font-weight: 650; line-height: 1.35; }

.product-duo { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(24px, 3vw, 40px); }
.product-panel { display: grid; grid-template-rows: auto 1fr; overflow: hidden; border: 1px solid var(--line); border-radius: 28px; background: #fff; }
.product-panel-media { min-height: 480px; background: linear-gradient(145deg, #f8f5f0, #fff); }
.product-panel-media img { width: 100%; height: 100%; max-height: 560px; object-fit: contain; padding: 36px; }
/* 产品卡实拍轮播:铺满裁切,去掉占位图的内边距与浅色底 */
.product-panel-media.carousel { position: relative; overflow: hidden; aspect-ratio: 4 / 3; min-height: 0; background: #14100c; }
.product-panel-media.carousel img { max-height: none; object-fit: cover; padding: 0; }
.product-panel-copy { padding: clamp(30px, 4vw, 52px); border-top: 1px solid var(--line); }
.product-panel-copy .model { color: var(--orange-dark); font-size: 12px; font-weight: 700; letter-spacing: .15em; }
.product-panel-copy h3 { margin-top: 14px; font-size: clamp(32px, 3.5vw, 48px); font-weight: 720; line-height: 1.04; letter-spacing: -.05em; }
.product-panel-copy p { margin-top: 18px; color: var(--secondary); font-size: 16px; line-height: 1.72; }
.product-specs { margin-top: 28px; display: grid; grid-template-columns: repeat(3, 1fr); border-top: 1px solid var(--line); }
.product-spec { padding-top: 18px; }
.product-spec strong { display: block; font-size: 20px; font-weight: 670; letter-spacing: -.03em; }
.product-spec span { display: block; margin-top: 5px; color: var(--tertiary); font-size: 11px; letter-spacing: .06em; }

.video-layout { display: grid; grid-template-columns: minmax(0, 1.2fr) minmax(320px, .8fr); gap: clamp(40px, 6vw, 90px); align-items: center; }
.video-shell { position: relative; overflow: hidden; aspect-ratio: 16 / 9; border-radius: 24px; background: #000; }
.video-shell video { width: 100%; height: 100%; object-fit: cover; }
.video-play {
  position: absolute;
  inset: 50% auto auto 50%;
  width: 70px;
  height: 70px;
  border: 1px solid rgba(255,255,255,.4);
  border-radius: 50%;
  color: #fff;
  background: rgba(10,10,10,.48);
  backdrop-filter: blur(14px);
  transform: translate(-50%, -50%);
  cursor: pointer;
  transition: transform 160ms var(--ease-spring), background 160ms ease;
}
.video-play:hover { background: rgba(255,105,0,.8); transform: translate(-50%, -50%) scale(1.04); }
.video-play[hidden] { display: none; }
.video-copy h2 { color: #fff; font-size: clamp(38px, 4vw, 60px); font-weight: 720; line-height: 1.05; letter-spacing: -.05em; }
.video-copy p { margin-top: 22px; color: rgba(255,255,255,.58); font-size: 17px; line-height: 1.75; }

.sequence { display: grid; grid-template-columns: repeat(3, 1fr); gap: clamp(20px, 3vw, 36px); margin-top: 70px; }
.sequence-step { position: relative; }
.sequence-image { overflow: hidden; aspect-ratio: 16 / 10; border-radius: 20px; background: var(--surface); }
.sequence-image img { width: 100%; height: 100%; object-fit: cover; }
.sequence-step .step-index { display: block; margin-top: 22px; color: var(--orange); font-size: 11px; font-weight: 720; letter-spacing: .12em; }
.sequence-step h3 { margin-top: 10px; font-size: 25px; font-weight: 660; letter-spacing: -.035em; }
.sequence-step p { margin-top: 10px; color: var(--secondary); font-size: 15px; line-height: 1.68; }

.timeline { position: relative; display: grid; grid-template-columns: repeat(3, 1fr); gap: clamp(34px, 5vw, 74px); }
.timeline::before { content: ""; position: absolute; top: 15px; right: 0; left: 0; height: 1px; background: var(--line); }
.timeline-step { position: relative; padding-top: 56px; }
.timeline-step::before { content: ""; position: absolute; top: 9px; left: 0; width: 13px; height: 13px; border: 4px solid #fff; border-radius: 50%; background: var(--orange); box-shadow: 0 0 0 1px var(--orange); }
.timeline-step .phase { color: var(--orange-dark); font-size: 11px; font-weight: 700; letter-spacing: .13em; }
.timeline-step h3 { margin-top: 14px; font-size: 29px; font-weight: 680; line-height: 1.15; letter-spacing: -.04em; }
.timeline-step p { margin-top: 14px; color: var(--secondary); font-size: 15px; line-height: 1.72; }

.studio-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1px; overflow: hidden; border: 1px solid rgba(255,255,255,.14); border-radius: 26px; background: rgba(255,255,255,.14); }
.studio-item { min-height: 280px; padding: clamp(30px, 4vw, 52px); background: #111; }
.studio-item .studio-index { color: #ff9b59; font-size: 11px; font-weight: 700; letter-spacing: .12em; }
.studio-item h3 { margin-top: 30px; color: #fff; font-size: clamp(27px, 2.7vw, 38px); font-weight: 680; line-height: 1.1; letter-spacing: -.045em; }
.studio-item p { margin-top: 16px; color: rgba(255,255,255,.56); font-size: 15px; line-height: 1.75; }

.spec-layout { display: grid; grid-template-columns: minmax(0, 1.1fr) minmax(320px, .9fr); gap: clamp(50px, 7vw, 100px); align-items: start; }
.spec-table { width: 100%; border-collapse: collapse; }
.spec-table tr { border-bottom: 1px solid var(--line); }
.spec-table th,
.spec-table td { padding: 18px 0; font-size: 15px; line-height: 1.45; }
.spec-table th { color: var(--label); font-weight: 620; text-align: left; }
.spec-table td { color: var(--secondary); text-align: right; }
.spec-table tr.highlight th,
.spec-table tr.highlight td { color: var(--orange-dark); font-weight: 680; }
.support-list { padding: clamp(30px, 4vw, 50px); border-radius: 24px; background: var(--surface); }
.support-list h3 { font-size: 30px; font-weight: 680; letter-spacing: -.04em; }
.support-list ul { margin-top: 26px; list-style: none; }
.support-list li { position: relative; padding-left: 17px; color: var(--secondary); font-size: 15px; line-height: 1.7; }
.support-list li + li { margin-top: 13px; }
.support-list li::before { content: ""; position: absolute; top: .72em; left: 0; width: 5px; height: 5px; border-radius: 50%; background: var(--orange); }

.solution-cta { padding: clamp(100px, 10vw, 150px) 0; color: #fff; background: var(--orange); text-align: center; }
.solution-cta h2 { max-width: 980px; margin-inline: auto; font-size: clamp(44px, 5.8vw, 78px); font-weight: 740; line-height: 1.02; letter-spacing: -.055em; }
.solution-cta p { max-width: 680px; margin: 24px auto 0; color: rgba(255,255,255,.82); font-size: 19px; line-height: 1.65; }
.solution-cta .hero-actions { justify-content: center; }

/* ===== 全站统一 footer(与 partials/footer.html 配套,样式移植自 style.css) ===== */
.footer { background-color: var(--ink); color: rgba(255, 255, 255, 0.7); padding: 60px 0 30px; font-size: 14px; }
.footer-container { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: clamp(24px, 4vw, 48px); max-width: 1280px; margin: 0 auto 50px; padding: 0 clamp(16px, 3vw, 32px); }
.footer-column { text-align: left; }
.footer-column:first-child { display: flex; flex-direction: column; justify-content: center; }
.footer-column h4 { color: #fff; font-size: 16px; margin-bottom: 20px; }
.footer-column ul { list-style: none; }
.footer-column ul li { margin-bottom: 10px; }
.footer-column a { color: rgba(255, 255, 255, 0.7); transition: color 0.3s ease; }
.footer-column a:hover { color: #fff; }
.footer-logo { margin-bottom: 16px; max-width: 220px; }
.footer-logo img { display: block; height: auto; width: 100%; max-width: 200px; margin-bottom: 16px; }
.footer-bottom { border-top: 1px solid rgba(255, 255, 255, 0.1); padding-top: 30px; margin-top: 30px; text-align: center; background: linear-gradient(to top, rgba(255, 122, 26, 0.08), rgba(255, 122, 26, 0) 70%); }
.footer-bottom p { margin-bottom: 10px; color: rgba(255, 255, 255, 0.7); }
.social-links { display: flex; justify-content: center; gap: 20px; margin-top: 20px; }
.social-links img { filter: invert(100%); }

@media (max-width: 768px) {
  .footer-container { grid-template-columns: 1fr; text-align: center; }
  .footer-column { padding-bottom: 30px; border-bottom: 1px solid rgba(255, 255, 255, 0.05); }
  .footer-column:last-child { border-bottom: none; }
  .footer-logo { margin: 0 auto 16px; }
  .footer-logo img { max-width: 180px; margin-inline: auto; }
}

.reveal { opacity: 0; transform: translateY(28px); transition: opacity 700ms var(--ease-out), transform 700ms var(--ease-out); }
.reveal.is-visible { opacity: 1; transform: translateY(0); }
.reveal-stagger > * { opacity: 0; transform: translateY(22px); transition: opacity 650ms var(--ease-out), transform 650ms var(--ease-out); }
.reveal-stagger.is-visible > * { opacity: 1; transform: translateY(0); }
.reveal-stagger.is-visible > *:nth-child(2) { transition-delay: 80ms; }
.reveal-stagger.is-visible > *:nth-child(3) { transition-delay: 160ms; }
.reveal-stagger.is-visible > *:nth-child(4) { transition-delay: 240ms; }

.back-to-top {
  position: fixed;
  right: 22px;
  bottom: 22px;
  z-index: 900;
  width: 44px;
  height: 44px;
  border: 1px solid rgba(34,28,22,.12);
  border-radius: 50%;
  color: var(--label);
  background: rgba(255,255,255,.86);
  box-shadow: 0 12px 34px rgba(33,25,18,.13);
  backdrop-filter: blur(14px);
  opacity: 0;
  pointer-events: none;
  transform: translateY(8px);
  transition: opacity 180ms ease, transform 180ms var(--ease-spring), color 160ms ease;
  cursor: pointer;
}
.back-to-top.is-visible { opacity: 1; pointer-events: auto; transform: translateY(0); }
.back-to-top:hover { color: var(--orange-dark); }
.back-to-top:active { transform: scale(.94); }

@media (max-width: 1040px) {
  .nav-toggle { display: block; }
  /* 链接收起为抽屉菜单(761-1040px 区间此前既无链接也无汉堡按钮) */
  .solution-links {
    position: fixed;
    top: var(--nav-height);
    right: 0;
    left: 0;
    height: calc(100dvh - var(--nav-height));
    padding: 38px 26px;
    margin-left: 0;
    display: flex;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    background: rgba(255,255,255,.97);
    backdrop-filter: blur(24px);
    opacity: 0;
    pointer-events: none;
    transform: translateY(-12px);
    transition: opacity 200ms ease, transform 260ms var(--ease-spring);
  }
  body.nav-open .solution-links { opacity: 1; pointer-events: auto; transform: translateY(0); }
  .solution-links a { padding: 18px 0; border-bottom: 1px solid var(--line); font-family: var(--font-display); font-size: 26px; font-weight: 600; }
  .solution-links a::after { display: none; }
  .nav-return { margin-left: auto; }
  .hero-grid { grid-template-columns: 1fr; }
  .hero-copy { max-width: 850px; }
  .hero-visual { min-height: 480px; }
  .hero-product.primary { width: min(70vw, 590px); right: 4%; }
  .hero-product.secondary { width: min(42vw, 350px); left: 5%; }
  .solution-split,
  .video-layout,
  .spec-layout { grid-template-columns: 1fr; }
  .solution-split.reverse .solution-media { order: initial; }
  .feature-columns { gap: 32px; }
}

@media (max-width: 760px) {
  :root { --nav-height: 68px; }
  .solution-container,
  .solution-narrow,
  .hero-grid { width: min(calc(100% - 28px), 1360px); }
  .nav-inner { width: min(calc(100% - 20px), 1280px); }
  .nav-return { display: none; }
  .solution-hero { min-height: auto; padding: calc(var(--nav-height) + 72px) 0 80px; }
  .hero-copy h1 { font-size: clamp(48px, 15vw, 68px); }
  .hero-copy .hero-subtitle { font-size: 26px; }
  .hero-stats { grid-template-columns: repeat(2, 1fr); row-gap: 22px; }
  .hero-visual { min-height: 370px; }
  .hero-product.primary { width: min(86vw, 520px); right: -6%; }
  .hero-product.secondary { width: min(52vw, 290px); left: -3%; }
  .hero-scroll { display: none; }
  .solution-section { padding: 88px 0; }
  .section-header { margin-bottom: 52px; }
  .section-header h2 { font-size: clamp(38px, 11vw, 52px); }
  .feature-columns,
  .product-duo,
  .sequence,
  .timeline,
  .studio-grid { grid-template-columns: 1fr; }
  .timeline::before { display: none; }
  .product-panel-media { min-height: 340px; }
  .solution-media { border-radius: 18px; }
  .solution-media img { min-height: 300px; }
  .comparison-grid { grid-template-columns: 1fr; }
  .video-shell { border-radius: 18px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
  .reveal, .reveal-stagger > * { opacity: 1 !important; transform: none !important; }
}
@media (prefers-reduced-transparency: reduce) {
  .solution-nav { background: #fff; backdrop-filter: none; -webkit-backdrop-filter: none; }
  .solution-button.secondary { background: rgba(10,10,10,.72); backdrop-filter: none; }
}
@media (prefers-contrast: more) {
  .solution-nav { background: #fff; border-bottom-color: #777; }
  .nav-return, .product-panel, .support-list { border: 1px solid #777; }
}

/* Page-specific composition helpers */
.wa-page .hero-grid,
.in-page .hero-grid,
.re-page .hero-grid { grid-template-columns: 1fr; }
.wa-page .hero-copy,
.in-page .hero-copy,
.re-page .hero-copy { max-width: 830px; }
.wa-page .hero-scrim {
  background:
    linear-gradient(90deg, rgba(10,10,10,.96) 0%, rgba(10,10,10,.8) 43%, rgba(10,10,10,.25) 74%, rgba(10,10,10,.44) 100%),
    linear-gradient(180deg, rgba(10,10,10,.08), rgba(10,10,10,.72));
}
.feature-columns.four { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.split-stack { display: grid; gap: clamp(92px, 11vw, 156px); }
.section-action { margin-top: 34px; }
.section-action .solution-button.secondary { color: var(--label); border-color: var(--line); background: var(--surface); }
.section-action .solution-button.secondary:hover { color: var(--orange-dark); border-color: rgba(255,105,0,.32); background: var(--orange-soft); }
/* quote-band 已移除(2026-09-08):引言文字并入 solution-cta 大标题 */
@media (max-width: 1040px) { .feature-columns.four { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 760px) { .feature-columns.four { grid-template-columns: 1fr; } }

/* ---------- 方案视频区(占位,视频到货后换 <video>) ---------- */
.solution-video { margin-top: clamp(28px, 4vw, 48px); }
.solution-video .video-frame {
  position: relative; aspect-ratio: 16 / 9; border-radius: 22px; overflow: hidden;
  border: 1px dashed rgba(255, 156, 91, 0.35);
  background: radial-gradient(120% 90% at 50% 100%, #241a10 0%, #100c08 58%, #0a0908 100%);
  display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 18px;
  transition: border-color 300ms, box-shadow 300ms;
}
.solution-video .video-frame:hover { border-color: rgba(255, 105, 0, 0.55); box-shadow: 0 32px 72px -30px rgba(255, 105, 0, 0.28); }
.solution-video .play-badge {
  width: 76px; height: 76px; border-radius: 50%;
  border: 1px solid rgba(255, 156, 91, 0.45); background: rgba(255, 105, 0, 0.12);
  display: flex; align-items: center; justify-content: center;
  color: var(--orange, #ff6900); font-size: 24px; padding-left: 6px;
}
.solution-video .video-tip { color: rgba(255, 255, 255, 0.45); font-size: 13.5px; letter-spacing: 0.18em; }
.solution-video video { width: 100%; height: 100%; object-fit: cover; display: block; }
.solution-video .video-frame:has(video) { border-style: solid; border-color: rgba(255, 156, 91, 0.18); }

/* ---------- 液态金属按钮(iframe,配合 fx/lm-bridge.js) ---------- */
.lm-btn { display: block; border: 0; background: transparent; width: var(--lm-w, 360px); max-width: 100%; height: 92px; margin: -10px 0; pointer-events: auto; } /* 配合 iframe data-pad=200 压缩辉光盒;盒间距 72px ≥ 20+52,互不遮挡,胶囊视觉间距 20px;max-width 防移动端溢出 */