/* ============================================
   ekotara website - global styles
   Dark technology aesthetic with vibrant accents
   ============================================ */

:root {
  --bg: #0a0a0f;
  --bg-2: #101018;
  --bg-3: #16161f;
  --surface: rgba(255, 255, 255, 0.04);
  --border: rgba(255, 255, 255, 0.09);
  --text: #f2f3f7;
  --text-dim: #a0a3b1;
  --text-faint: #6b6e7d;
  --accent: #00e5ff;
  --accent-2: #7c4dff;
  --gradient: linear-gradient(120deg, #00e5ff 0%, #7c4dff 100%);
  --radius: 16px;
  --header-h: 72px;
  --max-w: 1200px;
}

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

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: "PingFang SC", "HarmonyOS Sans SC", "Microsoft YaHei",
    -apple-system, "Segoe UI", sans-serif;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }

.container {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 24px;
}

section { padding: 110px 0; }

/* ---------- 通用标题 ---------- */
.sec-tag {
  display: inline-block;
  font-size: 13px;
  letter-spacing: 3px;
  color: var(--accent);
  text-transform: uppercase;
  margin-bottom: 14px;
}

.sec-title {
  font-size: clamp(28px, 4vw, 44px);
  font-weight: 700;
  letter-spacing: 1px;
  line-height: 1.3;
}

.sec-title .grad {
  background: var(--gradient);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.sec-desc {
  margin-top: 16px;
  color: var(--text-dim);
  max-width: 640px;
  font-size: 16px;
}

.sec-head { margin-bottom: 56px; }
.sec-head.center { text-align: center; }
.sec-head.center .sec-desc { margin-left: auto; margin-right: auto; }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 34px;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 1px;
  cursor: pointer;
  border: none;
  transition: transform .3s ease, box-shadow .3s ease, background .3s ease, color .3s ease;
}

.btn-primary {
  background: var(--gradient);
  color: #061018;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 24px rgba(0, 229, 255, .45), 0 0 48px rgba(124, 77, 255, .3);
}

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

.btn-ghost:hover {
  border-color: var(--accent);
  color: var(--accent);
  box-shadow: 0 0 18px rgba(0, 229, 255, .25);
}

/* ---------- Header ---------- */
.header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  height: var(--header-h);
  transition: background .35s ease, backdrop-filter .35s ease, border-color .35s ease;
  border-bottom: 1px solid transparent;
}

.header.scrolled {
  background: rgba(10, 10, 15, .72);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom-color: var(--border);
}

.header-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  height: 100%;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 20px;
  font-weight: 700;
  letter-spacing: 2px;
  line-height: 1.15;
}

.logo-mark {
  width: 34px; height: 34px;
  border-radius: 10px;
  background: var(--gradient);
  display: grid;
  place-items: center;
  color: #061018;
  font-weight: 800;
  font-size: 16px;
  box-shadow: 0 0 16px rgba(0, 229, 255, .35);
}

.logo small {
  display: block;
  margin-top: 3px;
  font-size: 11px;
  letter-spacing: 3px;
  color: var(--text-faint);
  font-weight: 400;
}

.nav { display: flex; align-items: center; gap: 36px; }

.nav a {
  position: relative;
  font-size: 15px;
  color: var(--text-dim);
  padding: 6px 0;
  transition: color .25s;
}

.nav a::after {
  content: "";
  position: absolute;
  left: 0; bottom: 0;
  width: 100%; height: 2px;
  background: var(--gradient);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .3s ease;
}

.nav a:hover, .nav a.active { color: var(--text); }
.nav a:hover::after, .nav a.active::after { transform: scaleX(1); }

.nav .btn { padding: 10px 24px; font-size: 14px; }

.lang-switch {
  min-width: 68px;
  height: 32px;
  padding: 0 12px;
  border: 1px solid rgba(255, 255, 255, .14);
  border-radius: 999px;
  background: rgba(255, 255, 255, .045);
  color: var(--text-dim);
  font: inherit;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: .08em;
  cursor: pointer;
  white-space: nowrap;
  transition: color .25s, border-color .25s, background .25s, box-shadow .25s;
}

.lang-switch:hover,
.lang-switch:focus-visible {
  color: var(--accent);
  border-color: var(--accent);
  background: rgba(0, 229, 255, .08);
  box-shadow: 0 0 16px rgba(0, 229, 255, .14);
  outline: none;
}

.lang-switch[data-current-language="en"] {
  color: #f2f3f7;
}

/* 汉堡菜单 */
.burger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}

.burger span {
  width: 24px; height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: transform .3s, opacity .3s;
}

.burger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.burger.open span:nth-child(2) { opacity: 0; }
.burger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ---------- Hero ---------- */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  overflow: hidden;
  padding: var(--header-h) 24px 60px;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 60% 45% at 20% 20%, rgba(0, 229, 255, .14), transparent 60%),
    radial-gradient(ellipse 55% 50% at 80% 75%, rgba(124, 77, 255, .16), transparent 60%),
    radial-gradient(ellipse 40% 35% at 60% 30%, rgba(124, 77, 255, .08), transparent 60%),
    var(--bg);
}

/* 光晕动效 */
.orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(90px);
  opacity: .5;
  animation: orbFloat 14s ease-in-out infinite alternate;
}

.orb-1 {
  width: 420px; height: 420px;
  background: rgba(0, 229, 255, .28);
  top: 8%; left: 6%;
}

.orb-2 {
  width: 520px; height: 520px;
  background: rgba(124, 77, 255, .26);
  bottom: 4%; right: 4%;
  animation-delay: -6s;
}

.orb-3 {
  width: 260px; height: 260px;
  background: rgba(0, 229, 255, .18);
  bottom: 24%; left: 38%;
  animation-delay: -3s;
}

@keyframes orbFloat {
  from { transform: translate(0, 0) scale(1); }
  to   { transform: translate(60px, -40px) scale(1.15); }
}

/* 网格纹理 */
.hero-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.035) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: radial-gradient(ellipse 70% 60% at 50% 50%, #000 30%, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse 70% 60% at 50% 50%, #000 30%, transparent 75%);
}

.hero-content { position: relative; z-index: 2; max-width: 880px; }

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 20px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--surface);
  font-size: 13px;
  color: var(--text-dim);
  letter-spacing: 1px;
  margin-bottom: 28px;
}

.hero-badge i {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 10px var(--accent);
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: .3; }
}

.hero h1 {
  font-size: clamp(38px, 7vw, 76px);
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: 2px;
}

.hero h1 .grad {
  background: var(--gradient);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-sub {
  margin: 26px auto 0;
  max-width: 620px;
  color: var(--text-dim);
  font-size: clamp(15px, 2vw, 18px);
}

.hero-cta {
  margin-top: 44px;
  display: flex;
  gap: 18px;
  justify-content: center;
  flex-wrap: wrap;
}

.hero-scroll {
  position: absolute;
  bottom: 34px;
  left: 50%;
  transform: translateX(-50%);
  color: var(--text-faint);
  font-size: 12px;
  letter-spacing: 2px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  z-index: 2;
}

.hero-scroll::after {
  content: "";
  width: 1px; height: 44px;
  background: linear-gradient(to bottom, var(--accent), transparent);
  animation: scrollLine 1.8s ease-in-out infinite;
}

@keyframes scrollLine {
  0% { transform: scaleY(0); transform-origin: top; }
  50% { transform: scaleY(1); transform-origin: top; }
  51% { transform-origin: bottom; }
  100% { transform: scaleY(0); transform-origin: bottom; }
}

/* 首屏文字淡入 */
.fade-up {
  opacity: 0;
  transform: translateY(34px);
  animation: fadeUp 1s cubic-bezier(.22, .8, .32, 1) forwards;
}

.fade-up.d1 { animation-delay: .15s; }
.fade-up.d2 { animation-delay: .35s; }
.fade-up.d3 { animation-delay: .55s; }
.fade-up.d4 { animation-delay: .75s; }

@keyframes fadeUp {
  to { opacity: 1; transform: translateY(0); }
}

/* ---------- 滚动渐入 ---------- */
.reveal {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity .9s cubic-bezier(.22, .8, .32, 1), transform .9s cubic-bezier(.22, .8, .32, 1);
}

.reveal.visible { opacity: 1; transform: translateY(0); }
.reveal.rd1 { transition-delay: .1s; }
.reveal.rd2 { transition-delay: .22s; }
.reveal.rd3 { transition-delay: .34s; }

/* ---------- 亮点卡片 ---------- */
.cards-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.hl-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 40px 32px;
  transition: transform .35s ease, box-shadow .35s ease, border-color .35s ease;
}

.hl-card:hover {
  transform: translateY(-8px);
  border-color: rgba(0, 229, 255, .35);
  box-shadow: 0 18px 44px rgba(0, 0, 0, .45), 0 0 30px rgba(0, 229, 255, .1);
}

.hl-icon {
  width: 56px; height: 56px;
  border-radius: 14px;
  background: rgba(0, 229, 255, .1);
  border: 1px solid rgba(0, 229, 255, .25);
  display: grid;
  place-items: center;
  margin-bottom: 24px;
}

.hl-icon svg { width: 26px; height: 26px; stroke: var(--accent); }

.hl-card h3 { font-size: 20px; margin-bottom: 12px; letter-spacing: 1px; }
.hl-card p { color: var(--text-dim); font-size: 14.5px; }

/* ---------- 产品预览 ---------- */
.product-preview {
  display: grid;
  grid-template-columns: 1.05fr 1fr;
  gap: 64px;
  align-items: center;
}

.pv-visual {
  position: relative;
  border-radius: 20px;
  overflow: hidden;
  border: 1px solid var(--border);
  box-shadow: 0 30px 70px rgba(0, 0, 0, .5);
}

.pv-visual img {
  width: 100%;
  transition: transform .6s cubic-bezier(.22, .8, .32, 1);
}

.pv-visual:hover img { transform: scale(1.06); }

.pv-visual::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(10,10,15,.45), transparent 45%);
  pointer-events: none;
}

.pv-tag {
  position: absolute;
  top: 20px; left: 20px;
  z-index: 2;
  padding: 6px 16px;
  border-radius: 999px;
  background: rgba(10, 10, 15, .6);
  backdrop-filter: blur(8px);
  border: 1px solid var(--border);
  font-size: 12.5px;
  letter-spacing: 1px;
  color: var(--accent);
}

.pv-info h3 {
  font-size: clamp(26px, 3.4vw, 38px);
  font-weight: 700;
  letter-spacing: 1px;
  margin-bottom: 8px;
}

.pv-slogan {
  color: var(--accent);
  font-size: 16px;
  letter-spacing: 1px;
  margin-bottom: 20px;
}

.pv-info > p { color: var(--text-dim); margin-bottom: 28px; }

.pv-feats { display: grid; gap: 14px; margin-bottom: 36px; }

.pv-feats li {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--text-dim);
  font-size: 15px;
}

.pv-feats li::before {
  content: "";
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--gradient);
  box-shadow: 0 0 8px rgba(0, 229, 255, .6);
  flex-shrink: 0;
}

/* ---------- 视频区 ---------- */
.video-wrap {
  position: relative;
  border-radius: 20px;
  overflow: hidden;
  border: 1px solid var(--border);
  background: #000;
  box-shadow: 0 30px 70px rgba(0, 0, 0, .5);
  aspect-ratio: 16 / 9;
}

.video-wrap video { width: 100%; height: 100%; object-fit: cover; }

.video-cover {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 18px;
  background:
    radial-gradient(ellipse 60% 60% at 50% 50%, rgba(124, 77, 255, .18), transparent 70%),
    linear-gradient(135deg, #0d0d16, #12121e);
  cursor: pointer;
  transition: opacity .4s;
}

.video-cover.hidden { opacity: 0; pointer-events: none; }

.play-btn {
  width: 84px; height: 84px;
  border-radius: 50%;
  background: var(--gradient);
  display: grid;
  place-items: center;
  box-shadow: 0 0 34px rgba(0, 229, 255, .45);
  transition: transform .3s;
}

.video-cover:hover .play-btn { transform: scale(1.1); }

.play-btn svg { width: 30px; height: 30px; fill: #061018; margin-left: 4px; }

.video-cover p { color: var(--text-dim); font-size: 14px; letter-spacing: 1px; }

.video-note {
  margin-top: 20px;
  text-align: center;
  color: var(--text-faint);
  font-size: 13.5px;
}

/* ---------- 团队背书 ---------- */
.team-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}

.team-visual {
  border-radius: 20px;
  overflow: hidden;
  border: 1px solid var(--border);
  box-shadow: 0 30px 70px rgba(0, 0, 0, .5);
}

.team-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-top: 40px;
}

.stat {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 26px 18px;
  text-align: center;
}

.stat .num {
  font-size: clamp(28px, 3.4vw, 40px);
  font-weight: 800;
  background: var(--gradient);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.stat .num small { font-size: .55em; }
.stat .label { margin-top: 6px; color: var(--text-dim); font-size: 13px; letter-spacing: 1px; }

.award-tags { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 28px; }

.award-tags span {
  padding: 8px 18px;
  border-radius: 999px;
  border: 1px solid rgba(124, 77, 255, .4);
  background: rgba(124, 77, 255, .1);
  color: #c4b0ff;
  font-size: 13px;
  letter-spacing: 1px;
}

/* ---------- CTA 引导区 ---------- */
.cta-band {
  position: relative;
  text-align: center;
  border-radius: 24px;
  padding: 90px 32px;
  overflow: hidden;
  border: 1px solid var(--border);
  background:
    radial-gradient(ellipse 50% 70% at 50% 0%, rgba(0, 229, 255, .12), transparent 65%),
    radial-gradient(ellipse 50% 70% at 50% 100%, rgba(124, 77, 255, .14), transparent 65%),
    var(--bg-2);
}

.cta-band h2 { font-size: clamp(26px, 3.6vw, 40px); font-weight: 700; letter-spacing: 1px; }
.cta-band p { margin: 16px auto 36px; color: var(--text-dim); max-width: 520px; }

/* ---------- Footer ---------- */
.footer {
  border-top: 1px solid var(--border);
  background: var(--bg-2);
  padding: 64px 0 32px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1.2fr;
  gap: 48px;
  margin-bottom: 48px;
}

.footer h4 {
  font-size: 15px;
  letter-spacing: 2px;
  margin-bottom: 20px;
  color: var(--text);
}

.footer-brand p { color: var(--text-dim); font-size: 14px; margin-top: 14px; max-width: 320px; }

.footer-links li { margin-bottom: 12px; }

.footer-links a {
  position: relative;
  color: var(--text-dim);
  font-size: 14px;
  transition: color .25s;
}

.footer-links a::after {
  content: "";
  position: absolute;
  left: 0; bottom: -2px;
  width: 100%; height: 1px;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .3s;
}

.footer-links a:hover { color: var(--accent); }
.footer-links a:hover::after { transform: scaleX(1); }

.footer-contact li {
  display: flex;
  gap: 10px;
  color: var(--text-dim);
  font-size: 14px;
  margin-bottom: 14px;
  align-items: flex-start;
}

.footer-contact svg {
  width: 16px; height: 16px;
  stroke: var(--accent);
  flex-shrink: 0;
  margin-top: 4px;
}

.footer-bottom {
  border-top: 1px solid var(--border);
  padding-top: 28px;
  text-align: center;
  color: var(--text-faint);
  font-size: 13px;
}

.footer-records {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px 18px;
  margin-top: 14px;
  color: var(--text-faint);
  font-size: 12px;
  line-height: 1.7;
}

.footer-records a {
  color: var(--text-faint);
  transition: color .25s;
}

.footer-records a:hover { color: var(--accent); }

/* ---------- 内页通用 Banner ---------- */
.page-hero {
  position: relative;
  padding: calc(var(--header-h) + 100px) 0 90px;
  text-align: center;
  overflow: hidden;
}

.page-hero .orb { opacity: .35; }

.page-hero h1 {
  position: relative;
  z-index: 2;
  font-size: clamp(32px, 5vw, 54px);
  font-weight: 800;
  letter-spacing: 2px;
}

.page-hero p {
  position: relative;
  z-index: 2;
  margin: 18px auto 0;
  color: var(--text-dim);
  max-width: 560px;
}

/* ---------- 关于我们 ---------- */
.story-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}

.story-visual {
  border-radius: 20px;
  overflow: hidden;
  border: 1px solid var(--border);
  box-shadow: 0 30px 70px rgba(0, 0, 0, .5);
}

.story-info p { color: var(--text-dim); margin-bottom: 18px; }
.story-info p strong { color: var(--text); font-weight: 600; }

.member-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.member-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 36px 28px;
  text-align: center;
  transition: transform .35s, border-color .35s, box-shadow .35s;
}

.member-card:hover {
  transform: translateY(-6px);
  border-color: rgba(0, 229, 255, .3);
  box-shadow: 0 16px 40px rgba(0, 0, 0, .4);
}

.avatar {
  width: 88px; height: 88px;
  margin: 0 auto 20px;
  border-radius: 50%;
  background: var(--gradient);
  display: grid;
  place-items: center;
  font-size: 30px;
  font-weight: 800;
  color: #061018;
  box-shadow: 0 0 24px rgba(0, 229, 255, .3);
}

.member-card h3 { font-size: 18px; letter-spacing: 1px; }
.member-card .role {
  color: var(--accent);
  font-size: 13px;
  letter-spacing: 1px;
  margin: 6px 0 14px;
}

.member-card p { color: var(--text-dim); font-size: 13.5px; }

/* 使命愿景 */
.vision-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 28px; }

.vision-card {
  border-radius: var(--radius);
  padding: 48px 40px;
  border: 1px solid var(--border);
  background: var(--surface);
  position: relative;
  overflow: hidden;
}

.vision-card::before {
  content: "";
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 3px;
  background: var(--gradient);
}

.vision-card h3 { font-size: 22px; margin-bottom: 14px; letter-spacing: 1px; }
.vision-card p { color: var(--text-dim); }

/* 核心优势 */
.adv-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }

/* ---------- 产品页 ---------- */
.scene-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
}

.scene-card {
  position: relative;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border);
  aspect-ratio: 16 / 10;
}

.scene-card img {
  width: 100%; height: 100%;
  object-fit: cover;
  transition: transform .6s cubic-bezier(.22, .8, .32, 1);
}

.scene-card:hover img { transform: scale(1.06); }

.scene-card .scene-info {
  position: absolute;
  left: 0; right: 0; bottom: 0;
  padding: 26px;
  background: linear-gradient(to top, rgba(10,10,15,.88), transparent);
}

.scene-info h3 { font-size: 19px; letter-spacing: 1px; }
.scene-info p { color: var(--text-dim); font-size: 13.5px; margin-top: 4px; }

/* 拍变选享 流程 */
.steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; margin-bottom: 80px; }

.step {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px 24px;
  position: relative;
}

.step .step-char {
  width: 52px; height: 52px;
  border-radius: 14px;
  background: var(--gradient);
  display: grid;
  place-items: center;
  font-size: 24px;
  font-weight: 800;
  color: #061018;
  margin-bottom: 18px;
  box-shadow: 0 0 18px rgba(0, 229, 255, .3);
}

.step h3 { font-size: 16px; letter-spacing: 1px; margin-bottom: 8px; }
.step p { color: var(--text-dim); font-size: 13.5px; }

.step .step-no {
  position: absolute;
  top: 24px; right: 24px;
  color: var(--text-faint);
  font-size: 13px;
  letter-spacing: 1px;
}

/* 前后对比滑块 */
.compare-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
}

.compare {
  position: relative;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border);
  aspect-ratio: 4 / 3;
  user-select: none;
  touch-action: none;
  cursor: ew-resize;
}

.compare img {
  position: absolute;
  inset: 0;
  width: 100%; height: 100%;
  object-fit: cover;
  pointer-events: none;
}

.compare .img-after { clip-path: inset(0 0 0 50%); }

.compare .cmp-handle {
  position: absolute;
  top: 0; bottom: 0;
  left: 50%;
  width: 2px;
  background: var(--accent);
  box-shadow: 0 0 12px rgba(0, 229, 255, .8);
  transform: translateX(-1px);
}

.cmp-handle::after {
  content: "⇔";
  position: absolute;
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  width: 40px; height: 40px;
  border-radius: 50%;
  background: var(--gradient);
  display: grid;
  place-items: center;
  color: #061018;
  font-size: 17px;
  font-weight: 700;
  box-shadow: 0 0 18px rgba(0, 229, 255, .5);
}

.cmp-label {
  position: absolute;
  top: 14px;
  padding: 4px 14px;
  border-radius: 999px;
  background: rgba(10, 10, 15, .62);
  backdrop-filter: blur(6px);
  border: 1px solid var(--border);
  font-size: 12px;
  letter-spacing: 1px;
  z-index: 2;
}

.cmp-label.before { left: 14px; color: var(--text-dim); }
.cmp-label.after { right: 14px; color: var(--accent); border-color: rgba(0, 229, 255, .4); }

.compare-caption {
  margin-top: 14px;
  text-align: center;
  color: var(--text-dim);
  font-size: 14px;
}

.compare-item .compare-caption b { color: var(--text); font-weight: 600; }

/* ---------- 联系页 ---------- */
.contact-grid {
  display: grid;
  grid-template-columns: minmax(0, 720px);
  justify-content: center;
  align-items: start;
}

.contact-info-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 36px 32px;
  margin-bottom: 28px;
}

.contact-info-card h3 { font-size: 18px; letter-spacing: 1px; margin-bottom: 22px; }

.ci-item {
  display: flex;
  gap: 14px;
  margin-bottom: 20px;
  align-items: flex-start;
}

.ci-item svg {
  width: 20px; height: 20px;
  stroke: var(--accent);
  flex-shrink: 0;
  margin-top: 3px;
}

.ci-item .ci-label { font-size: 12.5px; color: var(--text-faint); letter-spacing: 1px; }
.ci-item .ci-value { font-size: 15px; color: var(--text); margin-top: 2px; }
.ci-item .ci-value a:hover { color: var(--accent); }


/* ---------- 响应式 ---------- */
@media (max-width: 960px) {
  .cards-3, .adv-grid, .member-grid { grid-template-columns: 1fr 1fr; }
  .steps { grid-template-columns: 1fr 1fr; }
  .product-preview, .team-grid, .story-grid,
  .vision-grid, .contact-grid { grid-template-columns: 1fr; gap: 40px; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 680px) {
  section { padding: 76px 0; }

  .nav {
    position: fixed;
    top: var(--header-h);
    left: 0; right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    background: rgba(10, 10, 15, .96);
    backdrop-filter: blur(18px);
    border-bottom: 1px solid var(--border);
    padding: 12px 24px 24px;
    transform: translateY(-12px);
    opacity: 0;
    pointer-events: none;
    transition: opacity .3s, transform .3s;
  }

  .nav.open { opacity: 1; transform: translateY(0); pointer-events: auto; }
  .nav a { padding: 14px 0; border-bottom: 1px solid var(--border); }
  .nav .btn { margin-top: 16px; justify-content: center; }
  .nav .lang-switch { align-self: flex-start; margin-top: 16px; }

  .burger { display: flex; }

  .cards-3, .adv-grid, .member-grid, .steps,
  .scene-grid, .compare-grid, .footer-grid { grid-template-columns: 1fr; }

  .team-stats { grid-template-columns: 1fr 1fr; }
  .form-card { padding: 32px 24px; }
}