/* ── Reset & Variables ──────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --black:   #000000;
  --dark:    #1d1d1f;
  --mid:     #424245;
  --muted:   #6e6e73;
  --border:  #d2d2d7;
  --light:   #f5f5f7;
  --white:   #ffffff;
  --blue:    #0071e3;
  --blue-h:  #0077ed;
  --r:       18px;
}

html { scroll-behavior: smooth; }

body {
  font-family: "Microsoft Yahei", "PingFang SC", "Hiragino Sans GB", "Helvetica Neue", Arial, sans-serif;
  background: var(--black);
  color: var(--white);
  overflow-x: hidden;
  font-size: 17px;
  line-height: 1.47;
  letter-spacing: -.022em;
}

.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
.text-center { text-align: center; }

/* ── Nav ────────────────────────────────────────── */
#nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 999;
  height: 48px;
  background: rgba(0,0,0,.72);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 1px solid rgba(255,255,255,.08);
  transition: background .3s;
}
#nav.scrolled { background: rgba(0,0,0,.92); }

.nav-inner {
  max-width: 1200px; margin: 0 auto; height: 100%;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  padding: 0 24px;
}
.nav-links {
  justify-self: center;
}

.nav-logo {
  font-size: 20px; font-weight: 700; color: var(--white);
  text-decoration: none; letter-spacing: .5px;
}

.nav-links { display: flex; gap: 24px; }
.nav-links a {
  color: rgba(255,255,255,.8); text-decoration: none;
  font-size: 13px; transition: color .2s;
}
.nav-links a:hover { color: var(--white); }

.nav-buy {
  background: var(--blue); color: var(--white); text-decoration: none;
  font-size: 13px; font-weight: 500; padding: 6px 16px;
  border-radius: 980px; transition: background .2s;
  justify-self: end;
}
.nav-buy:hover { background: var(--blue-h); }

/* ── Hero ───────────────────────────────────────── */
.hero {
  min-height: 100vh;
  display: flex; flex-direction: column;
  align-items: center; justify-content: flex-start;
  text-align: center; padding: 120px 24px 0;
  overflow: hidden; position: relative;
  background: linear-gradient(180deg,
    #000000 0%,
    #010810 40%,
    #020c18 70%,
    #030e1e 100%);
}

.hero::before {
  content: '';
  position: absolute; inset: 0;
  background:
    radial-gradient(ellipse 60% 40% at 30% 80%, rgba(180,80,20,.12) 0%, transparent 60%),
    radial-gradient(ellipse 60% 40% at 70% 80%, rgba(0,80,180,.14) 0%, transparent 60%),
    radial-gradient(ellipse 50% 30% at 50% 45%, rgba(0,90,200,.10) 0%, transparent 60%);
  pointer-events: none;
}

.hero-eyebrow {
  font-size: 17px; font-weight: 600;
  color: rgba(255,255,255,.9); margin-bottom: 14px;
  letter-spacing: .01em;
}

.hero-title {
  font-size: clamp(30px, 5.3vw, 64px); font-weight: 700;
  line-height: 1.08; letter-spacing: -.03em;
  margin-bottom: 28px;
  background: linear-gradient(120deg,
    #38BDF8 0%,
    #60A5FA 25%,
    #F97316 65%,
    #FCD34D 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-cta { display: flex; gap: 20px; justify-content: center; margin-bottom: 64px; }

.btn-primary {
  background: var(--blue); color: var(--white); text-decoration: none;
  padding: 12px 24px; border-radius: 980px; font-size: 17px;
  font-weight: 500; transition: background .2s; display: inline-block;
}
.btn-primary:hover { background: var(--blue-h); }
.btn-primary.full { width: 100%; text-align: center; }

.btn-ghost {
  color: var(--blue); text-decoration: none;
  font-size: 17px; font-weight: 500;
  padding: 12px 0; transition: color .2s;
  background: none; border: none; cursor: pointer; font-family: inherit;
}
.btn-ghost:hover { color: var(--blue-h); }

/* ── 视频弹层 ─────────────────────────────────── */
.vmodal {
  position: fixed; inset: 0; z-index: 1000;
  display: flex; align-items: center; justify-content: center;
  opacity: 0; pointer-events: none;
  transition: opacity .35s ease;
}
.vmodal.is-open {
  opacity: 1; pointer-events: all;
}
.vmodal-backdrop {
  position: absolute; inset: 0;
  background: rgba(0,0,0,.88);
  backdrop-filter: blur(8px); -webkit-backdrop-filter: blur(8px);
}
.vmodal-box {
  position: relative; z-index: 1;
  width: min(900px, 92vw);
  transform: scale(.92);
  transition: transform .38s cubic-bezier(.34,1.3,.64,1);
}
.vmodal.is-open .vmodal-box {
  transform: scale(1);
}
.vmodal-video {
  width: 100%; display: block;
  aspect-ratio: 16 / 9;
  background: #000;
  border-radius: 12px;
  box-shadow: 0 32px 96px rgba(0,0,0,.7), 0 0 0 1px rgba(255,255,255,.06);
}
.vmodal-close {
  position: absolute; top: -44px; right: 0;
  background: rgba(255,255,255,.1); border: none; cursor: pointer;
  border-radius: 50%; width: 36px; height: 36px;
  display: flex; align-items: center; justify-content: center;
  transition: background .2s;
}
.vmodal-close:hover { background: rgba(255,255,255,.22); }

.hero-image {
  width: 100%; max-width: 1100px; position: relative;
  will-change: transform;
}
.hero-image img {
  width: 100%; height: auto; display: block;
  -webkit-mask-image:
    linear-gradient(to bottom,  transparent 0%,  black 22%, black 75%, transparent 100%),
    linear-gradient(to right,   transparent 0%,  black 8%,  black 92%, transparent 100%);
  -webkit-mask-composite: destination-in;
  mask-image:
    linear-gradient(to bottom,  transparent 0%,  black 22%, black 75%, transparent 100%),
    linear-gradient(to right,   transparent 0%,  black 8%,  black 92%, transparent 100%);
  mask-composite: intersect;
}

/* ── Section shared ──────────────────────────────── */
.section-label {
  font-size: 13px; font-weight: 600; letter-spacing: .1em;
  text-transform: uppercase; color: var(--blue);
  margin-bottom: 12px; display: block;
}
.section-label.light { color: rgba(255,255,255,.5); }

h2 {
  font-size: clamp(36px, 5vw, 64px); font-weight: 700;
  letter-spacing: -.03em; line-height: 1.06;
  color: var(--dark); margin-bottom: 24px;
}
h2.light { color: var(--white); }

/* ── Overview ────────────────────────────────────── */
.overview {
  background: var(--light); color: var(--dark);
  padding: 120px 24px;
}
.overview-sub {
  font-size: 21px; color: var(--muted); max-width: 560px;
  margin: 0 auto; line-height: 1.6;
}

/* ── Scenes ──────────────────────────────────────── */
.scenes {
  background: var(--black); padding: 100px 0 60px;
}
.scenes > .container { margin-bottom: 60px; }
.scenes-wrap {
  max-width: 1200px; margin: 0 auto; padding: 0 24px;
}
.scenes-stage {
  position: relative;
  height: 480px;
}

.scene {
  position: absolute; inset: 0;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px; align-items: center;
  padding: 40px 0;
  pointer-events: none;
  z-index: 0;
}
.scene.active {
  pointer-events: auto;
  z-index: 1;
}

.scene .scene-img {
  opacity: 0;
  transition: opacity .45s ease;
}
.scene.active .scene-img { opacity: 1; }

.scene .scene-body {
  opacity: 0;
  transition: opacity .4s ease;
}
.scene.active .scene-body {
  opacity: 1;
  transition: opacity .4s ease .15s;
}

.scene-img { border-radius: var(--r); overflow: hidden; }
.scene-img img { width: 100%; height: 380px; object-fit: cover; display: block; }
.scene-img.img-placeholder {
  height: 380px; background: rgba(255,255,255,.05);
  border: 1px dashed rgba(255,255,255,.12);
  display: flex; align-items: center; justify-content: center;
  color: var(--muted); font-size: 13px;
}

.scene-body h3 {
  font-size: 46px; font-weight: 700; letter-spacing: -.02em;
  color: var(--white); margin-bottom: 16px;
}
.scene-body p { font-size: 19px; color: rgba(255,255,255,.65); line-height: 1.6; }

.scenes-dots {
  display: flex; gap: 8px; justify-content: center; padding: 32px 0 0;
}
.dot {
  width: 8px; height: 8px; border-radius: 50%;
  background: rgba(255,255,255,.25); border: none; cursor: pointer;
  padding: 0; transition: all .3s;
}
.dot.active { background: var(--white); transform: scale(1.3); }

/* ── Features ────────────────────────────────────── */
.features {
  background: linear-gradient(180deg, #0d0d0d 0%, #0a0a0a 100%);
  padding: 120px 24px; position: relative;
}
.features h2 {
  font-size: 35px; font-weight: 700; letter-spacing: -.02em;
  color: var(--white); text-align: center; margin-bottom: 72px;
  white-space: nowrap;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px; max-width: 1200px; margin: 0 auto;
}

.feat-card {
  position: relative; overflow: hidden;
  background:
    linear-gradient(rgba(16,16,28,.78), rgba(16,16,28,.78)) padding-box,
    linear-gradient(135deg, rgba(56,189,248,.4) 0%, rgba(249,115,22,.25) 55%, rgba(168,85,247,.15) 100%) border-box;
  border: 1px solid transparent;
  border-radius: var(--r); padding: 44px 32px;
  backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px);
  transition: transform .38s cubic-bezier(.34,1.45,.64,1),
              box-shadow .38s ease,
              background .38s ease;
  transition-delay: var(--d, 0s) !important;
  z-index: 0;
  will-change: transform;
}
.feat-card:hover {
  transform: scale(1.08) !important;
  z-index: 3;
  transition: transform .38s cubic-bezier(.34,1.45,.64,1), box-shadow .38s ease !important;
  transition-delay: 0s !important;
  background:
    linear-gradient(rgba(14,14,26,.92), rgba(14,14,26,.92)) padding-box,
    linear-gradient(135deg, rgba(56,189,248,.85) 0%, rgba(249,115,22,.6) 55%, rgba(168,85,247,.35) 100%) border-box;
  box-shadow:
    0 0 0 1px rgba(56,189,248,.25),
    0 12px 48px rgba(56,189,248,.18),
    0 28px 72px rgba(0,0,0,.45),
    inset 0 1px 0 rgba(255,255,255,.06);
}
.feat-card::after {
  content: ''; position: absolute; inset: 0; pointer-events: none; z-index: 0;
  background: radial-gradient(ellipse 80% 45% at 50% 0%,
    rgba(56,189,248,.07) 0%, transparent 70%);
  transition: background .38s ease;
}
.feat-card:hover::after {
  background: radial-gradient(ellipse 90% 55% at 50% 0%,
    rgba(56,189,248,.2) 0%, transparent 65%);
}
.feat-icon {
  width: 54px; height: 54px;
  display: flex; align-items: center; justify-content: center;
  background: rgba(56,189,248,.08);
  border: 1px solid rgba(56,189,248,.28);
  border-radius: 14px;
  margin-bottom: 24px;
  position: relative; z-index: 1;
  box-shadow: 0 0 12px rgba(56,189,248,.1);
  transition: box-shadow .38s ease, background .38s ease;
}
.feat-card:hover .feat-icon {
  background: rgba(56,189,248,.16);
  box-shadow: 0 0 28px rgba(56,189,248,.35), 0 0 8px rgba(56,189,248,.2);
}
.feat-icon svg {
  width: 26px; height: 26px;
  stroke: #38BDF8;
  fill: none;
  stroke-width: 1.5;
  stroke-linecap: round;
  stroke-linejoin: round;
}
.feat-card h4 {
  position: relative; z-index: 1;
  font-size: 21px; font-weight: 700; margin-bottom: 10px; color: var(--white);
}
.feat-card p  {
  position: relative; z-index: 1;
  font-size: 15px; color: rgba(255,255,255,.55); line-height: 1.65;
}

/* ── Gallery ─────────────────────────────────────── */
.gallery { background: var(--black); padding: 80px 24px; }
.gallery-grid {
  max-width: 1200px; margin: 0 auto;
  display: grid;
  grid-template-columns: 3fr 2fr;
  grid-template-rows: 1fr 1fr;
  gap: 12px; height: 560px;
}
.gal-item { border-radius: var(--r); overflow: hidden; }
.gal-item.big { grid-row: span 2; }
.gal-item img {
  width: 100%; height: 100%; object-fit: cover; display: block;
  transition: transform .7s ease;
}
.gal-item:hover img { transform: scale(1.04); }
.gal-item.img-placeholder {
  background: rgba(255,255,255,.04);
  border: 1px dashed rgba(255,255,255,.1);
}

/* ── Specs ────────────────────────────────────────── */
.specs {
  background: var(--black);
  padding: 120px 24px; position: relative;
}
.specs h2 {
  text-align: center; margin-bottom: 60px;
  font-size: 46px;
}

.specs-table {
  width: 100%; max-width: 1000px; margin: 0 auto;
  border-collapse: collapse; position: relative; z-index: 1;
}

/* 表头 */
.specs-table thead th {
  padding: 28px 32px 20px; text-align: left;
  border-bottom: 1px solid rgba(255,255,255,.08);
  vertical-align: bottom;
}
.specs-table thead th.col-label { width: 180px; }
.specs-table thead th.col-model {
  font-size: 21px; font-weight: 700; color: #f5f5f7;
}
.spec-price-tag {
  font-size: 19px; font-weight: 600;
  color: #38BDF8; display: block; margin-top: 6px;
}

/* 数据行 */
.specs-table tbody tr { border-bottom: 1px solid rgba(255,255,255,.06); }
.specs-table tbody tr:last-child { border-bottom: none; }

/* 标签列 */
.specs-table tbody td.spec-label {
  padding: 28px 32px; width: 180px;
  font-size: 15px; font-weight: 700;
  color: #f5f5f7; vertical-align: top;
  letter-spacing: 0; line-height: 1.4;
  white-space: nowrap;
}

/* 内容列 */
.specs-table tbody td:not(.spec-label) {
  padding: 28px 32px; font-size: 15px;
  color: rgba(255,255,255,.5); line-height: 2.4;
  vertical-align: top;
}

.cell-highlight {
  color: #38BDF8; font-weight: 700; font-size: 15px;
}
.row-diff {
  background: rgba(180,140,55,.07);
  border-left: 3px solid rgba(180,140,55,.5);
}

.specs-note {
  max-width: 1000px; margin: 36px auto 0;
  font-size: 13px; color: rgba(255,255,255,.32);
  line-height: 1.9; padding: 0 32px;
}

@media (max-width: 700px) {
  .specs { padding: 80px 14px; }
  .specs h2 { font-size: 28px; margin-bottom: 36px; }

  .specs-table thead th.col-label,
  .specs-table tbody td.spec-label { display: table-cell; }

  /* 标签列：紧凑 */
  .specs-table thead th.col-label { width: 28%; padding: 12px 8px; }
  .specs-table tbody td.spec-label {
    width: 28%; padding: 12px 8px;
    font-size: 12px; font-weight: 600;
    white-space: normal; line-height: 1.4;
  }

  /* 值列 */
  .specs-table thead th { padding: 12px 8px; font-size: 14px; }
  .specs-table tbody td:not(.spec-label) {
    padding: 12px 8px; font-size: 12px; line-height: 1.6;
  }

  .specs-note { padding: 0 8px; font-size: 11px; }
}

/* ── Buy ──────────────────────────────────────────── */
.buy { background: var(--black); padding: 100px 24px 80px; }
.buy h2 { margin-bottom: 0; }
.buy-sub {
  font-size: 21px; color: rgba(255,255,255,.65); margin: 16px 0 64px;
}

.buy-cards {
  display: flex; gap: 24px; justify-content: center; flex-wrap: wrap;
}
.buy-card {
  background: #1d1d1f; border-radius: var(--r);
  padding: 48px 40px; min-width: 300px; max-width: 340px; flex: 1;
  border: 1px solid rgba(255,255,255,.1);
  display: flex; flex-direction: column; gap: 8px;
  text-align: left;
}
.buy-card.featured { background: var(--blue); border-color: transparent; }

.buy-tag { font-size: 12px; font-weight: 600; letter-spacing: .1em;
           text-transform: uppercase; color: rgba(255,255,255,.6); }
.buy-card h3 { font-size: 26px; font-weight: 700; color: var(--white); }
.buy-spec { font-size: 14px; color: rgba(255,255,255,.55); line-height: 1.5; flex: 1; }
.buy-price { font-size: 30px; font-weight: 700; color: var(--white); margin: 8px 0 16px; }

.btn-dark {
  background: var(--dark); color: var(--white); text-decoration: none;
  padding: 12px 24px; border-radius: 980px; font-size: 17px;
  font-weight: 500; transition: background .2s; display: inline-block;
}
.btn-dark:hover { background: #111; }
.btn-dark.full { width: 100%; text-align: center; }

.btn-link {
  display: block; text-align: center; margin-top: 12px;
  color: var(--blue); text-decoration: none; font-size: 15px;
}
.btn-link.light { color: rgba(255,255,255,.7); }
.btn-link:hover { text-decoration: underline; }

/* ── Hero price ──────────────────────────────────── */
.hero-price {
  font-size: 19px; color: rgba(255,255,255,.75);
  margin-bottom: 24px; font-weight: 400;
}

/* ── Highlights ──────────────────────────────────── */
.highlights {
  background: linear-gradient(180deg, #0a0a0a 0%, #0d0d0d 100%);
  padding: 100px 24px 120px;
}
.hl-title {
  font-size: 35px; font-weight: 700; color: var(--white);
  letter-spacing: -.03em; line-height: 1.08;
  text-align: center; margin-bottom: 56px;
}
.highlights-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px; max-width: 1100px; margin: 0 auto;
}
.hl-card {
  background: #111827;
  border-radius: 20px;
  padding: 32px 28px;
  position: relative; overflow: visible;
  border: 1px solid rgba(255,255,255,.06);
  transition: transform .38s cubic-bezier(.34,1.45,.64,1),
              box-shadow .38s ease,
              border-color .38s ease;
  transition-delay: var(--d,0s) !important;
  z-index: 0;
  will-change: transform;
}
.hl-card:hover {
  transform: scale(1.08) !important;
  z-index: 3;
  transition: transform .38s cubic-bezier(.34,1.45,.64,1),
              box-shadow .38s ease,
              border-color .38s ease !important;
  transition-delay: 0s !important;
  border-color: color-mix(in srgb, var(--ac, #3b82f6) 55%, transparent);
  box-shadow:
    0 0 0 1px color-mix(in srgb, var(--ac, #3b82f6) 40%, transparent),
    0 12px 48px color-mix(in srgb, var(--ac, #3b82f6) 22%, transparent),
    0 28px 72px rgba(0,0,0,.5),
    inset 0 1px 0 rgba(255,255,255,.07);
}
/* Colored top accent line */
.hl-card::before {
  content: '';
  position: absolute; top: 0; left: 0; right: 0; height: 2px;
  background: var(--ac, #3b82f6);
  transition: height .38s ease, opacity .38s ease;
  border-radius: 20px 20px 0 0;
}
.hl-card:hover::before {
  height: 3px;
  opacity: 1;
  filter: brightness(1.4);
}
/* Subtle inner glow from top */
.hl-card::after {
  content: '';
  position: absolute; inset: 0;
  background: radial-gradient(ellipse 80% 50% at 50% 0%,
    color-mix(in srgb, var(--ac, #3b82f6) 18%, transparent) 0%,
    transparent 65%);
  pointer-events: none;
  transition: opacity .38s ease;
  opacity: 1;
}
.hl-card:hover::after {
  opacity: 2.2;
}
.hl-tag {
  display: inline-block;
  font-size: 11px; font-weight: 600; letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--ac, #3b82f6);
  background: color-mix(in srgb, var(--ac, #3b82f6) 12%, transparent);
  padding: 3px 10px; border-radius: 980px;
  margin-bottom: 16px; width: fit-content;
}
.hl-card h4 {
  font-size: 19px; font-weight: 700; color: var(--white);
  margin-bottom: 10px; line-height: 1.3;
}
.hl-card p  { font-size: 13px; color: rgba(255,255,255,.5); line-height: 1.7; }

/* ── Transform ───────────────────────────────────── */
.transform {
  background: linear-gradient(180deg, #0d0d0d 0%, #000000 25%);
  padding: 100px 0 60px;
}
.transform > .container { margin-bottom: 40px; }
.transform-title {
  font-size: 46px; font-weight: 700;
  letter-spacing: -.03em; line-height: 1.08;
  margin-bottom: 24px;
  background: linear-gradient(120deg, #38BDF8 0%, #60A5FA 25%, #F97316 65%, #FCD34D 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.transform-sub {
  font-size: 19px; color: rgba(255,255,255,.6);
  line-height: 1.7; margin-top: 8px;
}

/* ── Ecosystem ───────────────────────────────────── */
.ecosystem { background: linear-gradient(180deg, #0d0d0d 0%, #0a0a0a 100%); padding: 100px 24px; }

.ecosystem .section-label {
  font-size: 46px;
  font-weight: 700;
  letter-spacing: -.025em;
  text-transform: none;
  text-align: center;
  background: linear-gradient(120deg, #38BDF8 0%, #60A5FA 25%, #F97316 65%, #FCD34D 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 10px;
}
.ecosystem h2 {
  font-size: clamp(18px, 1.8vw, 24px);
  font-weight: 400;
  color: rgba(255,255,255,.5);
  letter-spacing: -.01em;
  line-height: 1.5;
  margin-bottom: 48px;
  text-align: center;
}

/* ── Intel 芯片展示 ─── */
.chip-showcase {
  position: relative;
  max-width: 680px;
  margin: 0 auto 56px;
}
.chip-img {
  width: 100%;
  display: block;
  border-radius: 12px;
}
/* 四边渐变遮罩：将白底过渡到页面深色背景 */
.chip-showcase::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: 12px;
  background:
    linear-gradient(to right,  #0b0b0b 0%, transparent 18%, transparent 82%, #0b0b0b 100%),
    linear-gradient(to bottom, #0b0b0b 0%, transparent 14%, transparent 82%, #0b0b0b 100%);
  pointer-events: none;
  z-index: 1;
}
.chip-caption {
  position: relative;
  z-index: 2;
  text-align: center;
  margin-top: 14px;
  font-size: 13px;
  letter-spacing: .06em;
  color: rgba(255,255,255,.35);
}

.eco-grid {
  display: grid; grid-template-columns: repeat(2,1fr);
  gap: 20px; max-width: 1000px; margin: 0 auto;
}
.eco-card {
  position: relative; overflow: visible;
  background:
    linear-gradient(#18181e, #18181e) padding-box,
    linear-gradient(135deg, rgba(56,189,248,.45) 0%, rgba(249,115,22,.3) 55%, rgba(255,255,255,.06) 100%) border-box;
  border: 1px solid transparent;
  border-radius: var(--r);
  padding: 40px 36px;
  transition: transform .38s cubic-bezier(.34,1.45,.64,1),
              box-shadow .38s ease,
              background .38s ease;
  transition-delay: var(--d,0s) !important;
  z-index: 0; will-change: transform;
}
.eco-card:hover {
  transform: scale(1.08) !important;
  z-index: 3;
  transition: transform .38s cubic-bezier(.34,1.45,.64,1),
              box-shadow .38s ease !important;
  transition-delay: 0s !important;
  background:
    linear-gradient(#18181e, #18181e) padding-box,
    linear-gradient(135deg, rgba(56,189,248,.85) 0%, rgba(249,115,22,.6) 55%, rgba(255,255,255,.15) 100%) border-box;
  box-shadow:
    0 0 0 1px rgba(56,189,248,.25),
    0 12px 48px rgba(56,189,248,.16),
    0 28px 72px rgba(0,0,0,.45),
    inset 0 1px 0 rgba(255,255,255,.06);
}
.eco-card::after {
  content: '';
  position: absolute; inset: 0; pointer-events: none;
  background: radial-gradient(ellipse 90% 45% at 50% 0%,
    rgba(56,189,248,.07) 0%, transparent 70%);
  transition: opacity .38s ease;
}
.eco-card:hover::after { opacity: 2.5; }
.eco-tag {
  display: inline-block; padding: 4px 12px;
  background: var(--blue); color: var(--white);
  border-radius: 980px; font-size: 11px; font-weight: 700;
  letter-spacing: .06em; margin-bottom: 14px;
}
.eco-card h4 { font-size: 19px; font-weight: 700; color: var(--white); margin-bottom: 10px; }
.eco-card p  { font-size: 14px; color: rgba(255,255,255,.5); line-height: 1.75; }

/* ── AI Section ──────────────────────────────────── */
.ai-section {
  background: var(--black); padding: 100px 24px; position: relative;
}
.ai-section::before {
  content: ''; position: absolute; inset: 0; pointer-events: none;
  background:
    radial-gradient(ellipse 55% 35% at 15% 65%, rgba(56,189,248,.05) 0%, transparent 60%),
    radial-gradient(ellipse 50% 35% at 85% 35%, rgba(249,115,22,.04) 0%, transparent 60%);
}
.ai-section h2 {
  font-size: 46px;
  font-weight: 700; letter-spacing: -.025em;
  background: linear-gradient(120deg, #38BDF8 0%, #60A5FA 25%, #F97316 65%, #FCD34D 100%);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text; color: transparent;
  margin-bottom: 12px;
}
.ai-intro {
  font-size: 19px; color: rgba(255,255,255,.55); margin-top: 0;
}

/* ── AI 键盘图 ─── */
.ai-keyboard-showcase {
  position: relative;
  width: 100%;
  max-width: 860px;
  margin: 48px auto 0;
  overflow: hidden;
}
.ai-keyboard-img {
  width: 100%;
  display: block;
  border-radius: 4px;
}
/* 上下左右边缘渐变融入黑色背景 */
.ai-keyboard-showcase::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    linear-gradient(to right,  #0a0a0a 0%, transparent 12%, transparent 88%, #0a0a0a 100%),
    linear-gradient(to bottom, #0a0a0a 0%, transparent 18%, transparent 72%, #0a0a0a 100%);
  pointer-events: none;
  z-index: 1;
}

.ai-cards {
  display: grid; grid-template-columns: repeat(3,1fr);
  gap: 20px; margin-top: 56px; position: relative; z-index: 1;
}
.ai-card {
  position: relative; overflow: visible;
  background:
    linear-gradient(rgba(16,16,28,.78), rgba(16,16,28,.78)) padding-box,
    linear-gradient(135deg, rgba(56,189,248,.45) 0%, rgba(249,115,22,.28) 55%, rgba(168,85,247,.18) 100%) border-box;
  border: 1px solid transparent;
  border-radius: var(--r); padding: 40px 32px;
  backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px);
  transition: transform .38s cubic-bezier(.34,1.45,.64,1),
              box-shadow .38s ease,
              background .38s ease;
  transition-delay: var(--d,0s) !important;
  z-index: 0; will-change: transform;
}
.ai-card:hover {
  transform: scale(1.08) !important;
  z-index: 3;
  transition: transform .38s cubic-bezier(.34,1.45,.64,1),
              box-shadow .38s ease !important;
  transition-delay: 0s !important;
  background:
    linear-gradient(rgba(14,14,26,.92), rgba(14,14,26,.92)) padding-box,
    linear-gradient(135deg, rgba(56,189,248,.85) 0%, rgba(249,115,22,.6) 55%, rgba(168,85,247,.35) 100%) border-box;
  box-shadow:
    0 0 0 1px rgba(56,189,248,.25),
    0 12px 48px rgba(56,189,248,.18),
    0 28px 72px rgba(0,0,0,.45),
    inset 0 1px 0 rgba(255,255,255,.06);
}
.ai-card::after {
  content: ''; position: absolute; inset: 0; pointer-events: none; z-index: 0;
  background: radial-gradient(ellipse 80% 45% at 50% 0%,
    rgba(56,189,248,.08) 0%, transparent 70%);
  transition: opacity .38s ease;
}
.ai-card:hover::after {
  opacity: 2.5;
}
.ai-card h4 {
  position: relative; z-index: 1;
  font-size: 20px; font-weight: 700; color: var(--white); margin-bottom: 6px;
}
.ai-sub {
  position: relative; z-index: 1;
  font-size: 13px; color: rgba(255,255,255,.45); margin-bottom: 14px;
}
.ai-card p  {
  position: relative; z-index: 1;
  font-size: 14px; color: rgba(255,255,255,.6); line-height: 1.75;
}

/* ── Design Section ──────────────────────────────── */
/* ── 设计展示 滚动视差 ─────────────────────────── */
.design-showcase {
  height: 280vh;
  position: relative;
}
.showcase-sticky {
  position: sticky; top: 0;
  height: 100vh;
  background: #000;
  overflow: hidden;
}
.showcase-wallpaper {
  position: absolute; inset: 0;
  overflow: hidden;
  transform-origin: center center;
  will-change: transform, opacity, border-radius;
}
.wallpaper-img {
  width: 100%; height: 100%;
  object-fit: cover;
  display: block;
}
.showcase-product {
  position: absolute; inset: 0;
  display: flex; align-items: center; justify-content: center;
  background: #000;          /* 遮住两侧壁纸条纹 */
  opacity: 0;
  will-change: opacity;
}
.product-wrap {
  position: relative;
  max-width: 72%;
  line-height: 0;
}
.product-img {
  width: 100%;
  display: block;
  object-fit: contain;
}
/* 精准覆盖右下角水印（图片底边约 5%，右侧约 6%） */
.product-wrap::after {
  content: '';
  position: absolute;
  right: 0; bottom: 0;
  width: 5.5%; height: 4.5%;
  background: #000;
}

.design-section { background: #000; padding: 100px 24px; }
.design-section h2 {
  font-size: 46px;
  font-weight: 700; letter-spacing: -.025em;
  background: linear-gradient(120deg, #38BDF8 0%, #60A5FA 25%, #F97316 65%, #FCD34D 100%);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text; color: transparent;
  margin-bottom: 16px;
}
.design-sub {
  font-size: 19px; color: rgba(255,255,255,.5); line-height: 1.7; margin-top: 0;
}
.design-stats {
  display: flex; align-items: center; justify-content: center;
  gap: 0; margin-top: 72px; flex-wrap: wrap;
}
.stat { text-align: center; padding: 0 48px; }
.stat-num {
  display: block; font-size: 48px; font-weight: 700;
  color: var(--white); letter-spacing: -.03em; line-height: 1;
}
.stat-num small { font-size: 22px; font-weight: 400; }
.stat-label { display: block; font-size: 13px; color: rgba(255,255,255,.45); margin-top: 8px; }
.stat-divider {
  width: 1px; height: 60px; background: rgba(255,255,255,.12);
  flex-shrink: 0;
}

/* ── Disclaimer ──────────────────────────────────── */
.disclaimer { background: #0a0a0a; padding: 60px 24px 48px; border-top: 1px solid rgba(255,255,255,.08); }
.disclaimer h5 {
  font-size: 15px; font-weight: 700; color: rgba(255,255,255,.85);
  margin-bottom: 16px; letter-spacing: .02em;
}
.disclaimer ol { padding-left: 18px; }
.disclaimer li {
  font-size: 13px; color: rgba(255,255,255,.4); line-height: 1.9;
  margin-bottom: 6px;
}
.disclaimer-note {
  font-size: 13px; color: rgba(255,255,255,.4); line-height: 1.9;
  margin-top: 12px;
}

/* ── Responsive additions ────────────────────────── */
@media (max-width: 900px) {
  .highlights-grid { grid-template-columns: repeat(2, 1fr); }
  .eco-grid { grid-template-columns: 1fr; }
  .ai-cards { grid-template-columns: 1fr; }
  .design-stats { gap: 32px; }
  .stat-divider { display: none; }
}
@media (max-width: 600px) {
  .highlights-grid { grid-template-columns: 1fr; }
}

/* ── Footer ───────────────────────────────────────── */
.footer {
  background: #0a0a0a;
  padding: 32px 24px;
  border-top: 1px solid rgba(255,255,255,.06);
}
.footer .container {
  display: flex; flex-wrap: wrap; justify-content: space-between;
  align-items: center; gap: 16px;
}
.footer-brand {
  font-size: 14px; font-weight: 700; color: rgba(255,255,255,.7);
  letter-spacing: .04em;
}
.footer-copy { font-size: 12px; color: rgba(255,255,255,.28); margin-top: 4px; }
.footer-links { display: flex; gap: 24px; flex-wrap: wrap; }
.footer-links a {
  font-size: 12px; color: rgba(255,255,255,.35);
  text-decoration: none; transition: color .2s;
}
.footer-links a:hover { color: rgba(255,255,255,.75); }

/* ── Scroll Animations ────────────────────────────── */
.animate-up {
  opacity: 0; transform: translateY(28px);
  transition: opacity .7s ease, transform .7s ease;
  transition-delay: var(--d, 0s);
}
.animate-up.delay-1 { --d: .12s; }
.animate-up.delay-2 { --d: .24s; }
.animate-up.delay-3 { --d: .36s; }
.animate-up.visible { opacity: 1; transform: translateY(0); }

/* ── Responsive ────────────────────────────────────── */
@media (max-width: 900px) {
  .features-grid { grid-template-columns: repeat(2, 1fr); }
  .scene { grid-template-columns: 1fr; }
  .scene-img img { height: 240px; }
  .nav-links { display: none; }
}

@media (max-width: 600px) {
  .features-grid { grid-template-columns: 1fr; }
  .gallery-grid { grid-template-columns: 1fr; grid-template-rows: auto; height: auto; }
  .gal-item.big { grid-row: span 1; }
  .spec-row { grid-template-columns: 1fr; gap: 4px; }
  .buy-cards { flex-direction: column; align-items: center; }
}