/* =========================================================
   强泰弘顺 QTHS — Corporate Website
   设计系统：深色科技 / 青蓝渐变 / 玻璃质感
========================================================= */

:root {
  --bg: #05070c;
  --bg-soft: #080c13;
  --panel: rgba(255, 255, 255, 0.032);
  --line: rgba(255, 255, 255, 0.085);
  --line-strong: rgba(255, 255, 255, 0.16);
  --text: #e9eef6;
  --muted: #8d9bb0;
  --muted-2: #6f7d92;
  --teal: #2fe0d3;
  --blue: #4f9dff;
  --violet: #8b8bff;
  --grad: linear-gradient(115deg, #5ff5e8 0%, #4fc3ff 48%, #8e8bff 100%);
  --radius: 20px;
  --font: "Sora", "PingFang SC", "HarmonyOS Sans SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --container: 1200px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html {
  scroll-behavior: smooth;
  scroll-padding-top: 90px;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  font-size: 15px;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  opacity: 0.05;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='180' height='180'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='180' height='180' filter='url(%23n)'/%3E%3C/svg%3E");
}

img { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; color: inherit; }
::selection { background: rgba(47, 224, 211, 0.28); color: #fff; }

::-webkit-scrollbar { width: 10px; }
::-webkit-scrollbar-track { background: #060910; }
::-webkit-scrollbar-thumb {
  background: #1b2634;
  border-radius: 99px;
  border: 2px solid #060910;
}
::-webkit-scrollbar-thumb:hover { background: #2b3b4f; }

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

.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 28px;
  position: relative;
  z-index: 2;
}

.skip-link {
  position: fixed;
  top: -100px;
  left: 20px;
  z-index: 999;
  padding: 12px 20px;
  background: var(--teal);
  color: #04110f;
  border-radius: 8px;
  font-weight: 600;
  transition: top 0.3s var(--ease);
}
.skip-link:focus { top: 16px; }

/* ============ 通用组件 ============ */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  height: 52px;
  padding: 0 28px;
  border-radius: 999px;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.02em;
  white-space: nowrap;
  transition: transform 0.35s var(--ease), box-shadow 0.35s var(--ease),
    border-color 0.35s var(--ease), background 0.35s var(--ease), color 0.35s var(--ease);
  position: relative;
  overflow: hidden;
}

.btn--primary {
  color: #03110f;
  background: var(--grad);
  box-shadow: 0 10px 34px rgba(47, 224, 211, 0.22);
}
.btn--primary::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(110deg, transparent 20%, rgba(255, 255, 255, 0.5) 50%, transparent 80%);
  transform: translateX(-120%);
  transition: transform 0.7s var(--ease);
}
.btn--primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 18px 46px rgba(47, 224, 211, 0.32);
}
.btn--primary:hover::after { transform: translateX(120%); }

.btn--ghost {
  color: var(--text);
  border: 1px solid var(--line-strong);
  background: rgba(255, 255, 255, 0.03);
  backdrop-filter: blur(8px);
}
.btn--ghost:hover {
  transform: translateY(-3px);
  border-color: rgba(47, 224, 211, 0.6);
  background: rgba(47, 224, 211, 0.07);
  color: #bff8f2;
}

.btn--sm { height: 42px; padding: 0 20px; font-size: 13px; }
.btn--lg { height: 56px; padding: 0 32px; }
.btn__icon { width: 16px; height: 16px; transition: transform 0.35s var(--ease); }
.btn:hover .btn__icon { transform: translateX(4px); }

.tag {
  display: inline-flex;
  align-items: center;
  font-size: 9px;
  letter-spacing: 0.2em;
  color: var(--teal);
  text-transform: uppercase;
}

.grad-text {
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  filter: drop-shadow(0 0 36px rgba(47, 224, 211, 0.22));
}

.section {
  padding: 120px 0;
  position: relative;
}

.section-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 60px;
  margin-bottom: 64px;
}

.section-head__left { max-width: 640px; }

.section-index {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 11px;
  letter-spacing: 0.24em;
  color: var(--muted-2);
  margin-bottom: 18px;
  text-transform: uppercase;
}
.section-index span {
  color: var(--teal);
  font-weight: 600;
  font-size: 12px;
}
.section-index::after {
  content: "";
  width: 46px;
  height: 1px;
  background: linear-gradient(90deg, rgba(47, 224, 211, 0.6), transparent);
}
.section-index--light { color: rgba(255, 255, 255, 0.55); }

.section-title {
  font-size: clamp(30px, 3.6vw, 50px);
  line-height: 1.24;
  font-weight: 600;
  letter-spacing: -0.01em;
}

.section-head__desc {
  max-width: 400px;
  font-size: 14.5px;
  line-height: 2;
  color: var(--muted);
  padding-bottom: 6px;
}

/* ============ 顶部进度条 ============ */

.progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 2px;
  width: 0;
  background: var(--grad);
  z-index: 120;
  box-shadow: 0 0 16px rgba(47, 224, 211, 0.6);
}

/* ============ 页头 ============ */

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: 24px 0;
  transition: padding 0.4s var(--ease), background 0.4s var(--ease),
    border-color 0.4s var(--ease), backdrop-filter 0.4s var(--ease);
  border-bottom: 1px solid transparent;
}

.site-header.is-scrolled {
  padding: 14px 0;
  background: rgba(5, 7, 12, 0.72);
  border-bottom-color: var(--line);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 30px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}

.brand__mark {
  width: 38px;
  height: 38px;
  color: var(--teal);
  display: grid;
  place-items: center;
  filter: drop-shadow(0 0 14px rgba(47, 224, 211, 0.35));
}
.brand__mark svg { width: 100%; height: 100%; }

.brand__text { display: flex; flex-direction: column; line-height: 1; }
.brand__text strong {
  font-size: 17px;
  font-weight: 600;
  letter-spacing: 0.14em;
  color: var(--text);
}
.brand__text small {
  font-size: 8px;
  letter-spacing: 0.24em;
  color: var(--muted-2);
  margin-top: 6px;
  font-family: "Sora", sans-serif;
}

.nav {
  display: flex;
  align-items: center;
  gap: 34px;
}

.nav__link {
  position: relative;
  font-size: 13.5px;
  color: var(--muted);
  padding: 6px 0;
  transition: color 0.3s var(--ease);
}
.nav__link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 0;
  height: 1.5px;
  background: var(--grad);
  transition: width 0.35s var(--ease);
}
.nav__link:hover,
.nav__link.is-active { color: var(--text); }
.nav__link:hover::after,
.nav__link.is-active::after { width: 100%; }

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

.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  border: 1px solid var(--line-strong);
  background: rgba(255, 255, 255, 0.04);
  position: relative;
  z-index: 101;
}
.nav-toggle span {
  position: absolute;
  left: 50%;
  width: 18px;
  height: 1.5px;
  background: var(--text);
  transform: translateX(-50%);
  transition: transform 0.35s var(--ease), opacity 0.35s var(--ease);
}
.nav-toggle span:nth-child(1) { top: 18px; }
.nav-toggle span:nth-child(2) { top: 24px; width: 12px; left: 22px; transform: none; }
body.nav-open .nav-toggle span:nth-child(1) { top: 21px; transform: translateX(-50%) rotate(45deg); }
body.nav-open .nav-toggle span:nth-child(2) { top: 21px; left: 50%; width: 18px; transform: translateX(-50%) rotate(-45deg); }

/* ============ Hero ============ */

.hero {
  position: relative;
  min-height: 100svh;
  display: flex;
  align-items: center;
  padding: 150px 0 100px;
  overflow: hidden;
  isolation: isolate;
}

.hero__media {
  position: absolute;
  inset: -6% 0 0;
  z-index: -4;
}
.hero__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: 62% 50%;
  filter: saturate(0.92) contrast(1.03);
  transform: scale(1.03);
  will-change: transform;
}

.hero__veil {
  position: absolute;
  inset: 0;
  z-index: -3;
  background:
    linear-gradient(90deg, rgba(5, 7, 12, 0.97) 0%, rgba(5, 7, 12, 0.9) 34%, rgba(5, 7, 12, 0.42) 66%, rgba(5, 7, 12, 0.72) 100%),
    linear-gradient(180deg, rgba(5, 7, 12, 0.92) 0%, transparent 26%, transparent 66%, rgba(5, 7, 12, 0.98) 100%);
}

.hero__glow {
  position: absolute;
  z-index: -2;
  top: 8%;
  right: 6%;
  width: 620px;
  height: 620px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(47, 224, 211, 0.2), rgba(79, 157, 255, 0.08) 42%, transparent 68%);
  filter: blur(30px);
  animation: glowFloat 12s ease-in-out infinite alternate;
  pointer-events: none;
}

@keyframes glowFloat {
  from { transform: translate3d(0, -20px, 0) scale(1); opacity: 0.8; }
  to { transform: translate3d(-30px, 30px, 0) scale(1.08); opacity: 1; }
}

.hero__lines {
  position: absolute;
  inset: 0;
  z-index: -1;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.04) 1px, transparent 1px);
  background-size: 84px 84px;
  mask-image: radial-gradient(ellipse 75% 65% at 55% 48%, #000 15%, transparent 78%);
  -webkit-mask-image: radial-gradient(ellipse 75% 65% at 55% 48%, #000 15%, transparent 78%);
  opacity: 0.55;
  pointer-events: none;
}

.hero__inner {
  display: grid;
  grid-template-columns: 1.16fr 0.84fr;
  gap: 64px;
  align-items: center;
  width: 100%;
}

.hero__content { max-width: 720px; }

.eyebrow {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 10px;
  letter-spacing: 0.24em;
  color: rgba(255, 255, 255, 0.6);
  font-family: "Sora", sans-serif;
  margin-bottom: 26px;
  flex-wrap: wrap;
}
.eyebrow__dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--teal);
  box-shadow: 0 0 0 0 rgba(47, 224, 211, 0.6);
  animation: dotPulse 2.2s infinite;
  flex-shrink: 0;
}
@keyframes dotPulse {
  0% { box-shadow: 0 0 0 0 rgba(47, 224, 211, 0.55); }
  70% { box-shadow: 0 0 0 9px rgba(47, 224, 211, 0); }
  100% { box-shadow: 0 0 0 0 rgba(47, 224, 211, 0); }
}
.eyebrow__line { width: 34px; height: 1px; background: rgba(255, 255, 255, 0.25); }

.hero__title {
  font-size: clamp(44px, 6vw, 88px);
  line-height: 1.1;
  font-weight: 600;
  letter-spacing: -0.015em;
  margin-bottom: 28px;
}

.hero__desc {
  max-width: 560px;
  font-size: 16px;
  line-height: 1.95;
  color: #a9b6c8;
  margin-bottom: 36px;
}

.hero__actions {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
  margin-bottom: 38px;
}

.hero__points {
  display: flex;
  flex-wrap: wrap;
  gap: 14px 26px;
  font-size: 12.5px;
  color: var(--muted);
}
.hero__points li { display: flex; align-items: center; gap: 9px; }
.hero__points li span {
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--teal);
  box-shadow: 0 0 10px rgba(47, 224, 211, 0.8);
}

/* Hero 玻璃卡片 */
.hero-card {
  position: relative;
  padding: 28px;
  border-radius: 22px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  background: linear-gradient(160deg, rgba(13, 21, 32, 0.78), rgba(7, 11, 18, 0.55));
  backdrop-filter: blur(22px);
  -webkit-backdrop-filter: blur(22px);
  box-shadow: 0 30px 80px rgba(0, 0, 0, 0.55), inset 0 1px 0 rgba(255, 255, 255, 0.07);
}
.hero-card::before {
  content: "";
  position: absolute;
  top: -1px;
  left: 24px;
  right: 24px;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(47, 224, 211, 0.55), transparent);
}

.hero-card__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--line);
}
.hero-card__code {
  font-size: 9px;
  letter-spacing: 0.16em;
  color: var(--muted-2);
  font-family: "Sora", sans-serif;
}

.hero-card__list li {
  display: grid;
  grid-template-columns: 44px 1fr auto;
  align-items: center;
  gap: 15px;
  padding: 18px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.055);
}
.hero-card__list li:last-child { border-bottom: none; }

.hero-card__icon {
  width: 44px;
  height: 44px;
  display: grid;
  place-items: center;
  border-radius: 12px;
  color: var(--teal);
  background: rgba(47, 224, 211, 0.085);
  border: 1px solid rgba(47, 224, 211, 0.18);
}
.hero-card__icon svg { width: 22px; height: 22px; }

.hero-card__txt { display: flex; flex-direction: column; gap: 3px; }
.hero-card__txt strong { font-size: 14.5px; font-weight: 500; letter-spacing: 0.02em; }
.hero-card__txt small { font-size: 11px; color: var(--muted-2); letter-spacing: 0.02em; }

.hero-card__list em {
  font-style: normal;
  font-family: "Sora", sans-serif;
  font-size: 10px;
  color: rgba(255, 255, 255, 0.22);
  letter-spacing: 0.1em;
}

.hero-card__foot {
  display: flex;
  align-items: center;
  gap: 10px;
  padding-top: 18px;
  border-top: 1px solid var(--line);
  font-size: 11.5px;
  color: var(--muted);
  letter-spacing: 0.03em;
}
.pulse {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--teal);
  box-shadow: 0 0 0 0 rgba(47, 224, 211, 0.6);
  animation: dotPulse 2.4s infinite;
  flex-shrink: 0;
}

.scroll-cue {
  position: absolute;
  left: 50%;
  bottom: 30px;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  font-size: 8.5px;
  letter-spacing: 0.32em;
  color: var(--muted-2);
  z-index: 3;
  transition: color 0.3s;
}
.scroll-cue:hover { color: var(--teal); }
.scroll-cue__line {
  width: 1px;
  height: 42px;
  background: linear-gradient(180deg, transparent, rgba(47, 224, 211, 0.8));
  position: relative;
  overflow: hidden;
}
.scroll-cue__line::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 1px;
  height: 14px;
  background: var(--teal);
  animation: scrollLine 2s ease-in-out infinite;
}
@keyframes scrollLine {
  0% { transform: translateY(-16px); opacity: 0; }
  40% { opacity: 1; }
  100% { transform: translateY(44px); opacity: 0; }
}

.hero__side {
  position: absolute;
  right: 26px;
  top: 50%;
  transform: translateY(-50%);
  writing-mode: vertical-rl;
  font-size: 9px;
  letter-spacing: 0.36em;
  color: rgba(255, 255, 255, 0.22);
  font-family: "Sora", sans-serif;
  z-index: 3;
}

/* ============ Stats ============ */

.stats {
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.018), transparent);
}

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

.stat {
  padding: 40px 34px;
  border-left: 1px solid var(--line);
  position: relative;
}
.stat:first-child { border-left: none; padding-left: 0; }

.stat::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 1px;
  height: 0;
  background: var(--teal);
  transition: height 0.5s var(--ease);
}
.stat:hover::before { height: 60%; }

.stat__value {
  display: flex;
  align-items: baseline;
  gap: 4px;
  font-family: "Sora", sans-serif;
  font-size: clamp(30px, 3.2vw, 42px);
  font-weight: 600;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--text);
}
.stat__value i {
  font-style: normal;
  font-size: 15px;
  font-weight: 500;
  color: var(--teal);
  letter-spacing: 0.04em;
}
.stat__label {
  margin-top: 12px;
  font-size: 12.5px;
  color: var(--muted-2);
  letter-spacing: 0.08em;
}

/* ============ Marquee ============ */

.marquee {
  overflow: hidden;
  border-bottom: 1px solid var(--line);
  padding: 17px 0;
  background: var(--bg);
  position: relative;
}
.marquee::before,
.marquee::after {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  width: 120px;
  z-index: 2;
  pointer-events: none;
}
.marquee::before { left: 0; background: linear-gradient(90deg, var(--bg), transparent); }
.marquee::after { right: 0; background: linear-gradient(270deg, var(--bg), transparent); }

.marquee__track {
  display: flex;
  align-items: center;
  gap: 34px;
  width: max-content;
  animation: marquee 34s linear infinite;
}
.marquee:hover .marquee__track { animation-play-state: paused; }

.marquee__track span {
  font-size: 10.5px;
  letter-spacing: 0.24em;
  color: rgba(255, 255, 255, 0.38);
  white-space: nowrap;
  text-transform: uppercase;
}
.marquee__track .marquee__dot {
  color: var(--teal);
  font-size: 7px;
  opacity: 0.6;
  letter-spacing: 0;
}

@keyframes marquee {
  from { transform: translateX(0); }
  to { transform: translateX(-50%); }
}

/* ============ About ============ */

.about { overflow: hidden; }

.about__grid {
  display: grid;
  grid-template-columns: 0.92fr 1.08fr;
  gap: clamp(40px, 6vw, 88px);
  align-items: center;
}

.about__visual { position: relative; padding-left: 18px; padding-bottom: 24px; }
.about__visual::before {
  content: "";
  position: absolute;
  top: -14px;
  left: 0;
  width: 130px;
  height: 130px;
  border-top: 1px solid rgba(47, 224, 211, 0.45);
  border-left: 1px solid rgba(47, 224, 211, 0.45);
  border-radius: 4px 0 0 0;
  pointer-events: none;
}
.about__visual::after {
  content: "";
  position: absolute;
  right: 6px;
  bottom: 6px;
  width: 100px;
  height: 100px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.14);
  border-right: 1px solid rgba(255, 255, 255, 0.14);
  pointer-events: none;
}

.about__img-wrap {
  position: relative;
  border-radius: 22px;
  overflow: hidden;
  aspect-ratio: 4 / 4.55;
  background: #0b111a;
}
.about__img-wrap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 1.2s var(--ease);
}
.about__visual:hover .about__img-wrap img { transform: scale(1.04); }

.about__img-veil {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(5, 7, 12, 0.12) 0%, transparent 40%, rgba(5, 7, 12, 0.88) 100%);
}

.about__badge {
  position: absolute;
  left: 22px;
  bottom: 22px;
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 14px 18px;
  border-radius: 14px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  background: rgba(8, 13, 21, 0.66);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
}
.about__badge-num {
  font-size: 19px;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--teal);
}
.about__badge-txt {
  font-size: 10.5px;
  line-height: 1.55;
  color: rgba(255, 255, 255, 0.62);
  letter-spacing: 0.05em;
  border-left: 1px solid rgba(255, 255, 255, 0.16);
  padding-left: 14px;
}

.about__chip {
  position: absolute;
  right: -18px;
  bottom: 64px;
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px 18px;
  border-radius: 14px;
  border: 1px solid rgba(47, 224, 211, 0.24);
  background: rgba(9, 17, 24, 0.92);
  box-shadow: 0 22px 50px rgba(0, 0, 0, 0.5);
  max-width: 270px;
}
.about__chip svg { width: 26px; height: 26px; color: var(--teal); flex-shrink: 0; }
.about__chip span { display: flex; flex-direction: column; line-height: 1.5; }
.about__chip strong { font-size: 12.5px; font-weight: 500; }
.about__chip small { font-size: 10.5px; color: var(--muted-2); }

.about__lead {
  font-size: 18.5px;
  line-height: 1.9;
  color: #d7e0ec;
  margin-bottom: 20px;
  font-weight: 400;
}
.about__text {
  font-size: 14.5px;
  line-height: 2;
  color: var(--muted);
  margin-bottom: 32px;
}

.checklist {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px 20px;
  padding: 26px 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.checklist li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 13px;
  color: #aab6c6;
  line-height: 1.6;
}
.checklist__mark {
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: rgba(47, 224, 211, 0.12);
  border: 1px solid rgba(47, 224, 211, 0.35);
  position: relative;
  flex-shrink: 0;
  margin-top: 2px;
}
.checklist__mark::after {
  content: "";
  position: absolute;
  left: 5px;
  top: 3px;
  width: 4px;
  height: 7px;
  border-right: 1.4px solid var(--teal);
  border-bottom: 1.4px solid var(--teal);
  transform: rotate(40deg);
}

.about__mini {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
  margin: 30px 0 34px;
}
.about__mini div {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding-left: 16px;
  border-left: 1px solid var(--line);
}
.about__mini strong { font-size: 17px; font-weight: 500; letter-spacing: 0.04em; }
.about__mini span { font-size: 11.5px; color: var(--muted-2); letter-spacing: 0.06em; }

.text-link {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  font-size: 13.5px;
  color: var(--teal);
  padding-bottom: 6px;
  border-bottom: 1px solid rgba(47, 224, 211, 0.35);
  transition: gap 0.35s var(--ease), border-color 0.35s;
}
.text-link:hover { gap: 14px; border-color: var(--teal); }
.text-link svg { width: 15px; height: 15px; }

/* ============ Business ============ */

.business {
  background: linear-gradient(180deg, transparent, rgba(255, 255, 255, 0.014) 30%, transparent);
}

.cards {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 20px;
}

.card {
  display: flex;
  flex-direction: column;
  border-radius: 18px;
  border: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.04), rgba(255, 255, 255, 0.012));
  overflow: hidden;
  transition: transform 0.5s var(--ease), border-color 0.5s var(--ease), box-shadow 0.5s var(--ease);
}
.card:hover {
  transform: translateY(-8px);
  border-color: rgba(47, 224, 211, 0.35);
  box-shadow: 0 32px 64px rgba(0, 0, 0, 0.45), 0 0 0 1px rgba(47, 224, 211, 0.08);
}

.card__media {
  position: relative;
  aspect-ratio: 4 / 3.15;
  overflow: hidden;
  background: #0a1018;
}
.card__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 1s var(--ease), filter 0.6s;
  filter: saturate(0.92) brightness(0.9);
}
.card:hover .card__media img { transform: scale(1.07); filter: saturate(1.05) brightness(1); }

.card__media::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 45%, rgba(8, 12, 19, 0.85) 100%);
}

.card__num {
  position: absolute;
  top: 14px;
  right: 16px;
  z-index: 2;
  font-family: "Sora", sans-serif;
  font-size: 10px;
  letter-spacing: 0.16em;
  color: rgba(255, 255, 255, 0.55);
  padding: 5px 9px;
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.16);
  background: rgba(5, 8, 13, 0.45);
  backdrop-filter: blur(6px);
}

.card__body {
  display: flex;
  flex-direction: column;
  flex: 1;
  padding: 24px 22px 24px;
}
.card__body h3 {
  font-size: 18px;
  font-weight: 500;
  letter-spacing: 0.02em;
  margin-bottom: 10px;
}
.card__body p {
  font-size: 13px;
  line-height: 1.85;
  color: var(--muted);
  margin-bottom: 18px;
}

.card__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 22px;
}
.card__tags li {
  font-size: 10px;
  letter-spacing: 0.04em;
  color: var(--muted-2);
  padding: 3px 9px;
  border: 1px solid rgba(255, 255, 255, 0.09);
  border-radius: 999px;
  transition: color 0.3s, border-color 0.3s;
}
.card:hover .card__tags li { color: #b9c6d8; border-color: rgba(255, 255, 255, 0.16); }

.card__link {
  margin-top: auto;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  color: var(--teal);
  letter-spacing: 0.04em;
  transition: gap 0.35s var(--ease);
}
.card__link svg { width: 14px; height: 14px; }
.card__link:hover { gap: 13px; }

/* ============ Supply Chain ============ */

.supply {
  position: relative;
  padding: 140px 0;
  overflow: hidden;
  isolation: isolate;
}

.supply__bg {
  position: absolute;
  inset: 0;
  z-index: -3;
}
.supply__bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  filter: saturate(0.85);
}
.supply__veil {
  position: absolute;
  inset: 0;
  z-index: -2;
  background:
    linear-gradient(90deg, rgba(4, 6, 11, 0.97) 6%, rgba(4, 6, 11, 0.88) 44%, rgba(4, 6, 11, 0.34) 100%),
    linear-gradient(180deg, rgba(5, 7, 12, 0.8), rgba(5, 7, 12, 0.55) 50%, rgba(5, 7, 12, 0.92));
}

.supply__content { max-width: 680px; }

.supply__desc {
  font-size: 15px;
  line-height: 2;
  color: #a5b2c4;
  margin: 22px 0 42px;
  max-width: 560px;
}

.steps {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 4px 34px;
  margin-bottom: 44px;
}
.step {
  display: flex;
  gap: 16px;
  padding: 18px 0;
  border-top: 1px solid rgba(255, 255, 255, 0.14);
  transition: border-color 0.4s;
}
.step:hover { border-top-color: rgba(47, 224, 211, 0.6); }
.step__num {
  font-family: "Sora", sans-serif;
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--teal);
  padding-top: 2px;
  flex-shrink: 0;
}
.step h4 { font-size: 14.5px; font-weight: 500; margin-bottom: 4px; }
.step p { font-size: 12px; color: rgba(255, 255, 255, 0.62); line-height: 1.7; }

/* ============ Applications ============ */

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

.app {
  position: relative;
  height: 340px;
  border-radius: 18px;
  overflow: hidden;
  border: 1px solid var(--line);
  display: block;
  isolation: isolate;
  transition: border-color 0.5s var(--ease), transform 0.5s var(--ease);
}
.app--wide { grid-column: span 2; }

.app img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 1.1s var(--ease), filter 0.8s;
  filter: saturate(0.9) brightness(0.94);
}
.app:hover img { transform: scale(1.06); filter: saturate(1.05) brightness(1); }
.app:hover { border-color: rgba(47, 224, 211, 0.35); }

.app__veil {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(5, 7, 12, 0.28) 0%, rgba(5, 7, 12, 0.05) 26%, rgba(5, 7, 12, 0.88) 70%, rgba(5, 7, 12, 0.96) 100%);
  z-index: 1;
}

.app__body {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 2;
  padding: 28px;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}
.app__index {
  font-family: "Sora", sans-serif;
  font-size: 9px;
  letter-spacing: 0.2em;
  color: var(--teal);
  margin-bottom: 10px;
  opacity: 0.9;
}
.app h3 {
  font-size: 23px;
  font-weight: 500;
  letter-spacing: 0.02em;
  margin-bottom: 8px;
  text-shadow: 0 2px 18px rgba(0, 0, 0, 0.65);
}
.app p {
  font-size: 12.5px;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.75);
  max-width: 420px;
  text-shadow: 0 1px 14px rgba(0, 0, 0, 0.7);
}
.app__more {
  margin-top: 16px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 11.5px;
  color: var(--teal);
  letter-spacing: 0.06em;
  opacity: 0;
  transform: translateY(8px);
  transition: opacity 0.4s var(--ease), transform 0.4s var(--ease);
}
.app__more svg { width: 13px; height: 13px; }
.app:hover .app__more,
.app:focus-visible .app__more { opacity: 1; transform: translateY(0); }

/* ============ Why ============ */

.why {
  background:
    radial-gradient(ellipse 60% 50% at 85% 10%, rgba(79, 157, 255, 0.06), transparent 70%),
    linear-gradient(180deg, transparent, rgba(255, 255, 255, 0.014));
}

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

.feature {
  position: relative;
  padding: 32px 28px;
  border-radius: 16px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.022);
  overflow: hidden;
  transition: transform 0.5s var(--ease), border-color 0.5s var(--ease), background 0.5s;
}
.feature::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(47, 224, 211, 0.65), transparent);
  opacity: 0;
  transition: opacity 0.5s;
}
.feature:hover {
  transform: translateY(-5px);
  border-color: rgba(255, 255, 255, 0.16);
  background: rgba(255, 255, 255, 0.04);
}
.feature:hover::before { opacity: 1; }

.feature__icon {
  width: 46px;
  height: 46px;
  display: grid;
  place-items: center;
  border-radius: 12px;
  color: var(--teal);
  background: rgba(47, 224, 211, 0.07);
  border: 1px solid rgba(47, 224, 211, 0.16);
  margin-bottom: 22px;
  transition: transform 0.5s var(--ease), background 0.4s;
}
.feature:hover .feature__icon {
  transform: translateY(-3px) rotate(-3deg);
  background: rgba(47, 224, 211, 0.12);
}
.feature__icon svg { width: 23px; height: 23px; }

.feature h3 {
  font-size: 16.5px;
  font-weight: 500;
  margin-bottom: 9px;
  letter-spacing: 0.03em;
}
.feature p {
  font-size: 13px;
  line-height: 1.9;
  color: var(--muted);
}

/* ============ CTA ============ */

.cta-band { padding: 10px 0 30px; }

.cta {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 48px;
  padding: clamp(36px, 5vw, 64px);
  border-radius: 26px;
  border: 1px solid rgba(47, 224, 211, 0.16);
  background: linear-gradient(115deg, #08201f 0%, #081521 42%, #0a1220 100%);
  overflow: hidden;
  isolation: isolate;
}
.cta::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.038) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.038) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: linear-gradient(90deg, transparent, #000 40%, #000);
  -webkit-mask-image: linear-gradient(90deg, transparent, #000 40%, #000);
}
.cta__orb {
  position: absolute;
  right: -8%;
  top: -60%;
  width: 540px;
  height: 540px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(47, 224, 211, 0.22), transparent 62%);
  filter: blur(20px);
  z-index: -1;
  pointer-events: none;
}

.cta__eyebrow {
  font-size: 9px;
  letter-spacing: 0.26em;
  color: var(--teal);
  margin-bottom: 16px;
  font-family: "Sora", sans-serif;
}
.cta h2 {
  font-size: clamp(24px, 2.9vw, 38px);
  line-height: 1.4;
  font-weight: 600;
  letter-spacing: -0.01em;
  margin-bottom: 14px;
}
.cta__desc { font-size: 13.5px; color: #9fb0c2; max-width: 520px; line-height: 1.9; }

.cta__actions {
  display: flex;
  flex-direction: column;
  gap: 10px;
  flex-shrink: 0;
  min-width: 200px;
}

/* ============ Contact ============ */

.contact { padding-top: 130px; }

.contact__grid {
  display: grid;
  grid-template-columns: 0.92fr 1.08fr;
  gap: 22px;
  align-items: stretch;
}

.contact__panel {
  position: relative;
  border-radius: 22px;
  border: 1px solid var(--line);
  background: linear-gradient(165deg, rgba(255, 255, 255, 0.045), rgba(255, 255, 255, 0.012));
  padding: 38px 34px;
  overflow: hidden;
  isolation: isolate;
}
.contact__glow {
  position: absolute;
  top: -120px;
  right: -120px;
  width: 340px;
  height: 340px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(47, 224, 211, 0.16), transparent 65%);
  filter: blur(10px);
  z-index: -1;
  pointer-events: none;
}

.contact__title { font-size: 21px; font-weight: 500; letter-spacing: 0.02em; margin-bottom: 8px; }
.contact__sub {
  font-family: "Sora", sans-serif;
  font-size: 9px;
  letter-spacing: 0.2em;
  color: var(--muted-2);
  margin-bottom: 16px;
  padding-bottom: 22px;
  border-bottom: 1px solid var(--line);
}

.info li {
  display: grid;
  grid-template-columns: 42px 1fr;
  gap: 15px;
  padding: 18px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}
.info__icon {
  width: 42px;
  height: 42px;
  display: grid;
  place-items: center;
  border-radius: 11px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.03);
  color: var(--teal);
}
.info__icon svg { width: 20px; height: 20px; }
.info__label {
  display: block;
  font-size: 10.5px;
  letter-spacing: 0.16em;
  color: var(--muted-2);
  margin-bottom: 5px;
}
.info__txt p { font-size: 13.5px; line-height: 1.75; color: #c3cfde; }
.info__txt a { transition: color 0.3s; border-bottom: 1px solid transparent; }
.info__txt a:hover { color: var(--teal); border-bottom-color: rgba(47, 224, 211, 0.4); }

.map {
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  margin-top: 24px;
  min-height: 186px;
  padding: 22px;
  border-radius: 16px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  background:
    radial-gradient(ellipse 90% 80% at 70% 0%, rgba(47, 224, 211, 0.13), transparent 65%),
    linear-gradient(160deg, #0a1320, #070c15);
  overflow: hidden;
  transition: border-color 0.4s, transform 0.4s var(--ease);
}
.map:hover { border-color: rgba(47, 224, 211, 0.45); transform: translateY(-3px); }

.map__grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.055) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.055) 1px, transparent 1px);
  background-size: 34px 34px;
  mask-image: radial-gradient(ellipse at 60% 40%, #000, transparent 78%);
  -webkit-mask-image: radial-gradient(ellipse at 60% 40%, #000, transparent 78%);
  opacity: 0.9;
}
.map__grid::after {
  content: "";
  position: absolute;
  left: 0;
  top: 58%;
  width: 130%;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(47, 224, 211, 0.45), transparent);
  transform: rotate(-13deg);
}

.map__pin {
  position: absolute;
  top: 26px;
  right: 30px;
  color: var(--teal);
  width: 30px;
  height: 30px;
  filter: drop-shadow(0 0 10px rgba(47, 224, 211, 0.5));
}
.map__pin svg { width: 100%; height: 100%; }
.map__pulse {
  position: absolute;
  left: 50%;
  top: 54%;
  width: 40px;
  height: 40px;
  margin: -20px 0 0 -20px;
  border-radius: 50%;
  border: 1px solid rgba(47, 224, 211, 0.5);
  animation: mapPulse 2.6s ease-out infinite;
}
@keyframes mapPulse {
  0% { transform: scale(0.5); opacity: 1; }
  100% { transform: scale(2); opacity: 0; }
}

.map__label { position: relative; z-index: 2; display: flex; flex-direction: column; gap: 3px; }
.map__label strong { font-size: 13.5px; font-weight: 500; letter-spacing: 0.02em; }
.map__label small { font-size: 11px; color: var(--muted-2); }

.map__cta {
  position: relative;
  z-index: 2;
  margin-top: 12px;
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-size: 11.5px;
  color: var(--teal);
  letter-spacing: 0.06em;
}
.map__cta svg { width: 13px; height: 13px; transition: transform 0.35s var(--ease); }
.map:hover .map__cta svg { transform: translateX(4px); }

/* 表单 */
.contact__form {
  border-radius: 22px;
  border: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.032), rgba(255, 255, 255, 0.008));
  padding: 38px 34px;
  display: flex;
  flex-direction: column;
}

.form__title { font-size: 20px; font-weight: 500; letter-spacing: 0.02em; margin-bottom: 6px; }
.form__hint { font-size: 12.5px; color: var(--muted-2); margin-bottom: 28px; line-height: 1.8; }

.form__row {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
  margin-bottom: 16px;
}

.field { display: flex; flex-direction: column; gap: 8px; }
.field > span {
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--muted);
}
.field > span em { font-style: normal; color: var(--teal); margin-left: 3px; }

.field input,
.field select,
.field textarea {
  width: 100%;
  font-family: inherit;
  font-size: 13.5px;
  color: var(--text);
  background: rgba(4, 7, 12, 0.62);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 10px;
  padding: 13px 14px;
  transition: border-color 0.3s, box-shadow 0.3s, background 0.3s;
}
.field textarea { resize: vertical; min-height: 118px; line-height: 1.7; }
.field input::placeholder,
.field textarea::placeholder { color: #55627a; }

.field select {
  appearance: none;
  -webkit-appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath d='M2.5 4.5 6 8l3.5-3.5' fill='none' stroke='%238d9bb0' stroke-width='1.3' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 14px center;
  padding-right: 36px;
  cursor: pointer;
}
.field select option { background: #0b1119; color: var(--text); }

.field input:focus,
.field select:focus,
.field textarea:focus {
  outline: none;
  border-color: rgba(47, 224, 211, 0.6);
  background: rgba(6, 12, 18, 0.9);
  box-shadow: 0 0 0 3px rgba(47, 224, 211, 0.1);
}

.field.is-error input,
.field.is-error textarea { border-color: rgba(255, 107, 107, 0.6); }

.btn--submit { width: 100%; margin-top: 22px; height: 50px; }
.form__note { font-size: 11px; color: #7e8b9e; margin-top: 12px; text-align: center; }

/* ============ Footer ============ */

.footer {
  position: relative;
  margin-top: 60px;
  padding-top: 80px;
  border-top: 1px solid var(--line);
  background: #04060a;
  overflow: hidden;
}

.footer__inner {
  display: grid;
  grid-template-columns: 1.6fr repeat(3, 1fr);
  gap: 48px;
  padding-bottom: 60px;
}

.footer__brand .brand { margin-bottom: 18px; }
.footer__brand p {
  font-size: 13px;
  line-height: 1.9;
  color: var(--muted-2);
  max-width: 300px;
  margin-bottom: 22px;
}

.footer__social { display: flex; gap: 10px; }
.footer__social a {
  width: 38px;
  height: 38px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  border: 1px solid var(--line);
  color: var(--muted);
  transition: color 0.3s, border-color 0.3s, transform 0.3s var(--ease), background 0.3s;
}
.footer__social a:hover {
  color: var(--teal);
  border-color: rgba(47, 224, 211, 0.4);
  background: rgba(47, 224, 211, 0.06);
  transform: translateY(-3px);
}
.footer__social svg { width: 17px; height: 17px; }

.footer__col h4 {
  font-size: 10.5px;
  letter-spacing: 0.18em;
  color: #cfd9e6;
  font-weight: 500;
  margin-bottom: 20px;
  text-transform: uppercase;
}
.footer__col a {
  display: block;
  font-size: 12.5px;
  color: var(--muted-2);
  margin-bottom: 12px;
  transition: color 0.3s, transform 0.3s var(--ease);
}
.footer__col a:hover { color: var(--teal); transform: translateX(3px); }

.footer__contact p {
  font-size: 12.5px;
  color: var(--muted-2);
  line-height: 1.9;
  margin-bottom: 12px;
}

.footer__bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding-top: 24px;
  padding-bottom: 26px;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  font-size: 11.5px;
  color: #7d8b9f;
  position: relative;
  z-index: 2;
}
.footer__meta { letter-spacing: 0.06em; }

.footer__word {
  font-family: "Sora", sans-serif;
  font-size: clamp(56px, 12.5vw, 178px);
  font-weight: 700;
  line-height: 0.78;
  letter-spacing: 0.02em;
  text-align: center;
  color: rgba(255, 255, 255, 0.026);
  white-space: nowrap;
  user-select: none;
  margin-top: 30px;
  margin-bottom: -14px;
}

/* ============ Dock / Toast ============ */

.dock {
  position: fixed;
  right: 22px;
  bottom: 26px;
  display: flex;
  flex-direction: column;
  gap: 9px;
  z-index: 60;
}
.dock__btn {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  color: var(--muted);
  border: 1px solid var(--line-strong);
  background: rgba(8, 12, 19, 0.72);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  transition: color 0.3s, border-color 0.3s, transform 0.3s var(--ease), background 0.3s;
}
.dock__btn svg { width: 18px; height: 18px; }
.dock__btn:hover {
  color: var(--teal);
  border-color: rgba(47, 224, 211, 0.5);
  background: rgba(47, 224, 211, 0.08);
  transform: translateY(-3px);
}
.dock__top {
  opacity: 0;
  visibility: hidden;
  transform: translateY(8px);
}
body.scrolled .dock__top { opacity: 1; visibility: visible; transform: none; }

.toast {
  position: fixed;
  left: 50%;
  bottom: 34px;
  transform: translate(-50%, 16px);
  padding: 12px 22px;
  border-radius: 999px;
  border: 1px solid rgba(47, 224, 211, 0.4);
  background: rgba(6, 15, 20, 0.95);
  backdrop-filter: blur(14px);
  color: #d8f8f4;
  font-size: 12.5px;
  letter-spacing: 0.02em;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity 0.4s var(--ease), transform 0.4s var(--ease), visibility 0.4s;
  z-index: 200;
  max-width: 86vw;
  text-align: center;
  box-shadow: 0 16px 44px rgba(0, 0, 0, 0.6);
}
.toast.is-show {
  opacity: 1;
  visibility: visible;
  transform: translate(-50%, 0);
}

/* ============ 滚动揭示 ============ */

[data-reveal] {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.85s var(--ease), transform 0.85s var(--ease);
  transition-delay: var(--d, 0s);
  will-change: opacity, transform;
}
[data-reveal].is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* ============ 响应式 ============ */

@media (max-width: 1120px) {
  .nav { gap: 24px; }
  .nav__link { font-size: 13px; }
  .hero__inner { grid-template-columns: 1.1fr 0.9fr; gap: 40px; }
  .cards { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .card__media { aspect-ratio: 4 / 2.8; }
  .footer__inner { grid-template-columns: 1.4fr repeat(3, 1fr); gap: 34px; }
}

@media (max-width: 960px) {
  .section { padding: 96px 0; }
  .nav {
    position: fixed;
    inset: 0;
    z-index: 90;
    flex-direction: column;
    justify-content: center;
    gap: 8px;
    background: rgba(4, 6, 10, 0.96);
    backdrop-filter: blur(22px);
    -webkit-backdrop-filter: blur(22px);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-16px);
    transition: opacity 0.4s var(--ease), transform 0.4s var(--ease), visibility 0.4s;
  }
  body.nav-open .nav { opacity: 1; visibility: visible; transform: none; }
  .nav__link {
    font-size: 22px;
    padding: 14px 0;
    color: var(--muted);
  }
  body.nav-open .nav__link { animation: navIn 0.5s var(--ease) both; }
  body.nav-open .nav__link:nth-child(1) { animation-delay: 0.05s; }
  body.nav-open .nav__link:nth-child(2) { animation-delay: 0.1s; }
  body.nav-open .nav__link:nth-child(3) { animation-delay: 0.15s; }
  body.nav-open .nav__link:nth-child(4) { animation-delay: 0.2s; }
  body.nav-open .nav__link:nth-child(5) { animation-delay: 0.25s; }
  body.nav-open .nav__link:nth-child(6) { animation-delay: 0.3s; }
  @keyframes navIn {
    from { opacity: 0; transform: translateY(14px); }
    to { opacity: 1; transform: translateY(0); }
  }
  .nav__link::after { display: none; }
  .nav__link { width: 240px; text-align: left; padding-left: 2px; }

  .nav-toggle { display: block; }
  .header__cta { display: none; }

  /* 避免 header 的 backdrop-filter 成为 fixed 菜单的包含块 */
  .site-header,
  .site-header.is-scrolled {
    -webkit-backdrop-filter: none;
    backdrop-filter: none;
  }
  .site-header.is-scrolled { background: rgba(5, 7, 12, 0.94); }

  /* 移动端隐藏右侧浮动 dock，避免遮挡内容 */
  .dock { display: none; }

  .hero { min-height: auto; padding: 140px 0 110px; }
  .hero__inner { grid-template-columns: 1fr; }
  .hero__content { max-width: 100%; }
  .hero-card { max-width: 460px; }
  .hero__media img { object-position: 70% 50%; }
  .hero__veil {
    background:
      linear-gradient(180deg, rgba(5, 7, 12, 0.9) 0%, rgba(5, 7, 12, 0.72) 45%, rgba(5, 7, 12, 0.97) 100%),
      linear-gradient(90deg, rgba(5, 7, 12, 0.92), rgba(5, 7, 12, 0.35));
  }
  .hero__side { display: none; }
  .scroll-cue { display: none; }

  .section-head { flex-direction: column; align-items: flex-start; gap: 24px; margin-bottom: 48px; }
  .section-head__desc { max-width: 560px; }

  .stats__grid { grid-template-columns: repeat(2, 1fr); }
  .stat { padding: 30px 24px; border-left: 1px solid var(--line); }
  .stat:nth-child(odd) { border-left: none; padding-left: 0; }
  .stat:nth-child(n + 3) { border-top: 1px solid var(--line); }

  .about__grid { grid-template-columns: 1fr; gap: 56px; }
  .about__visual { max-width: 520px; }
  .about__img-wrap { aspect-ratio: 4 / 4.1; }
  .about__chip { right: 0; }

  .supply { padding: 110px 0; }
  .supply__veil {
    background:
      linear-gradient(180deg, rgba(4, 6, 11, 0.94) 0%, rgba(4, 6, 11, 0.82) 55%, rgba(4, 6, 11, 0.96) 100%);
  }
  .supply__bg img { object-position: 62% 50%; }

  .apps { grid-template-columns: repeat(2, 1fr); }
  .app { height: 300px; }
  .app--wide { grid-column: span 2; }

  .features { grid-template-columns: repeat(2, 1fr); }

  .cta { flex-direction: column; align-items: flex-start; gap: 32px; }
  .cta__actions { flex-direction: row; flex-wrap: wrap; width: 100%; }
  .cta__actions .btn { flex: 1; min-width: 160px; }

  .contact__grid { grid-template-columns: 1fr; }
  .contact__panel,
  .contact__form { padding: 32px 28px; }

  .footer__inner { grid-template-columns: repeat(2, 1fr); gap: 40px; }
  .footer__brand { grid-column: span 2; }
  .footer__brand p { max-width: 440px; }
}

@media (max-width: 640px) {
  .container { padding: 0 20px; }
  .section { padding: 80px 0; }
  .section-title { font-size: clamp(26px, 7vw, 34px); }
  .section-head { margin-bottom: 40px; }

  .site-header { padding: 16px 0; }
  .brand__mark { width: 32px; height: 32px; }
  .brand__text strong { font-size: 15px; }

  .hero { padding: 118px 0 84px; }
  .hero__title { font-size: clamp(38px, 11.5vw, 56px); margin-bottom: 22px; }
  .hero__desc { font-size: 14.5px; margin-bottom: 28px; }
  .hero__actions { gap: 10px; }
  .hero__actions .btn { flex: 1; min-width: 150px; height: 48px; padding: 0 18px; }
  .hero__points { gap: 10px 18px; font-size: 11.5px; }
  .hero-card { padding: 22px; }
  .hero-card__list li { padding: 14px 0; }
  .eyebrow { font-size: 8.5px; letter-spacing: 0.18em; gap: 8px; }
  .eyebrow__line { display: none; }

  .stats__grid { grid-template-columns: repeat(2, 1fr); }
  .stat { padding: 24px 16px; }
  .stat__value { font-size: 30px; }
  .stat__label { font-size: 11px; letter-spacing: 0.02em; }

  .marquee { padding: 14px 0; }
  .marquee__track { gap: 22px; }

  .about__img-wrap { aspect-ratio: 4 / 4.4; }
  .about__chip { position: relative; right: auto; bottom: auto; margin-top: 16px; max-width: none; }
  .about__visual { padding-left: 0; padding-bottom: 0; }
  .about__visual::before { left: -8px; width: 80px; height: 80px; }
  .about__visual::after { display: none; }
  .checklist { grid-template-columns: 1fr; gap: 12px; }
  .about__lead { font-size: 16.5px; }
  .about__mini strong { font-size: 15px; }

  .cards { grid-template-columns: 1fr; }
  .card__media { aspect-ratio: 4 / 3; }

  .steps { grid-template-columns: 1fr; gap: 0; margin-bottom: 36px; }

  .apps { grid-template-columns: 1fr; }
  .app--wide { grid-column: span 1; }
  .app { height: 280px; }
  .app__body { padding: 24px 22px; }
  .app__more { opacity: 1; transform: none; }
  .app h3 { font-size: 21px; }

  .features { grid-template-columns: 1fr; }
  .feature { padding: 26px 22px; }

  .cta { padding: 32px 24px; }
  .cta__actions { flex-direction: column; }
  .cta__actions .btn { width: 100%; }

  .form__row { grid-template-columns: 1fr; gap: 16px; }
  .contact__panel,
  .contact__form { padding: 26px 22px; }
  .contact__title { font-size: 19px; }

  .footer { padding-top: 64px; }
  .footer__inner { grid-template-columns: 1fr; gap: 36px; }
  .footer__brand { grid-column: span 1; }
  .footer__bottom { flex-direction: column; align-items: flex-start; gap: 8px; }
  .footer__word { font-size: 15vw; }

  .dock { right: 14px; bottom: 16px; gap: 7px; }
  .dock__btn { width: 40px; height: 40px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
  [data-reveal] { opacity: 1; transform: none; }
}