/* ==========================================================================
   扁鹊科技 · 官网样式系统
   黑红科技感 · 东方医道 × 未来科技
   ========================================================================== */

:root {
  --bg:        #0a0a0c;
  --bg-soft:   #0f0f14;
  --bg-card:   #14141a;
  --line:      rgba(255, 255, 255, .08);
  --line-soft: rgba(255, 255, 255, .05);

  --red:       #ff2d3f;
  --red-deep:  #e2001a;
  --red-soft:  #ff5a68;
  --red-glow:  rgba(255, 45, 63, .5);

  --text:      #f6f6f8;
  --muted:     #9a9aa8;
  --muted-2:   #6d6d7c;

  --radius:    20px;
  --radius-sm: 12px;
  --maxw:      1200px;

  --ease:      cubic-bezier(.22, .61, .36, 1);
}

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

html { scroll-behavior: smooth; scroll-padding-top: 90px; }

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

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }
sup { font-size: .55em; vertical-align: super; }

::selection { background: var(--red); color: #fff; }

/* ---------------------------- 全局背景装饰 ---------------------------- */
.bg-grid {
  position: fixed; inset: 0; z-index: -3; pointer-events: none;
  background-image:
    linear-gradient(var(--line-soft) 1px, transparent 1px),
    linear-gradient(90deg, var(--line-soft) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: radial-gradient(ellipse 90% 70% at 50% 0%, #000 20%, transparent 80%);
  -webkit-mask-image: radial-gradient(ellipse 90% 70% at 50% 0%, #000 20%, transparent 80%);
  opacity: .7;
}

.bg-glow {
  position: fixed; inset: 0; z-index: -2; pointer-events: none;
  background:
    radial-gradient(600px 400px at 78% -5%, rgba(226, 0, 26, .28), transparent 65%),
    radial-gradient(700px 500px at 8% 30%, rgba(255, 45, 63, .12), transparent 60%),
    radial-gradient(900px 600px at 50% 110%, rgba(226, 0, 26, .16), transparent 65%);
  filter: saturate(1.1);
}

#pulse-canvas {
  position: fixed; inset: 0; z-index: -1; pointer-events: none; opacity: .55;
}

.scanline {
  position: fixed; inset: 0; z-index: 999; pointer-events: none; opacity: .06;
  background: repeating-linear-gradient(
    to bottom, transparent 0 2px, rgba(255, 255, 255, .6) 2px 3px);
  mix-blend-mode: overlay;
}

/* ---------------------------- 通用排版 ---------------------------- */
.grad {
  background: linear-gradient(100deg, var(--red-soft), var(--red) 45%, var(--red-deep));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}

.stroke {
  color: transparent;
  -webkit-text-stroke: 1.4px rgba(255, 255, 255, .34);
}

.eyebrow {
  display: inline-flex; align-items: center; gap: 10px;
  font-size: .78rem; letter-spacing: .28em; text-transform: uppercase;
  color: var(--muted); font-weight: 600;
}
.eyebrow .dot {
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--red); box-shadow: 0 0 12px var(--red), 0 0 26px var(--red-glow);
  animation: blink 2s var(--ease) infinite;
}
@keyframes blink { 0%,100% { opacity: 1; } 50% { opacity: .3; } }

.section { max-width: var(--maxw); margin: 0 auto; padding: 120px 24px; position: relative; }
.section__head { max-width: 780px; margin-bottom: 64px; }
.section__head h2 {
  font-size: clamp(2rem, 4.4vw, 3.4rem); line-height: 1.18;
  letter-spacing: -.02em; margin: 20px 0 22px; font-weight: 800;
}
.section__lead { color: var(--muted); font-size: 1.05rem; }

/* ---------------------------- 按钮 ---------------------------- */
.btn {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 14px 28px; border-radius: 999px;
  font-weight: 600; font-size: .95rem; letter-spacing: .02em;
  border: 1px solid transparent; cursor: pointer;
  transition: transform .35s var(--ease), box-shadow .35s var(--ease),
              background .35s var(--ease), color .35s var(--ease);
  white-space: nowrap;
}
.btn .arrow { transition: transform .35s var(--ease); }
.btn:hover .arrow { transform: translateX(5px); }

.btn--primary {
  background: linear-gradient(100deg, var(--red-soft), var(--red) 40%, var(--red-deep));
  color: #fff;
  box-shadow: 0 10px 30px -8px var(--red-glow), inset 0 1px 0 rgba(255,255,255,.25);
}
.btn--primary:hover { transform: translateY(-3px); box-shadow: 0 18px 44px -10px var(--red-glow); }

.btn--line {
  border-color: rgba(255, 45, 63, .5); color: var(--text);
  background: rgba(255, 45, 63, .06);
}
.btn--line:hover { background: rgba(255, 45, 63, .16); transform: translateY(-3px); border-color: var(--red); }

.btn--ghost {
  border-color: var(--line); color: var(--text); background: rgba(255,255,255,.03);
  padding: 10px 22px; font-size: .88rem;
}
.btn--ghost:hover { border-color: var(--red); color: var(--red-soft); background: rgba(255,45,63,.08); }

/* ---------------------------- 导航 ---------------------------- */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  transition: background .4s var(--ease), backdrop-filter .4s var(--ease),
              border-color .4s var(--ease), padding .4s var(--ease);
  border-bottom: 1px solid transparent;
}
.nav.is-scrolled {
  background: rgba(10, 10, 12, .78);
  backdrop-filter: blur(18px) saturate(1.4);
  -webkit-backdrop-filter: blur(18px) saturate(1.4);
  border-bottom-color: var(--line);
}
.nav__inner {
  max-width: var(--maxw); margin: 0 auto; padding: 18px 24px;
  display: flex; align-items: center; gap: 28px;
}
.brand { display: flex; align-items: center; gap: 12px; margin-right: auto; }
.brand__mark { display: grid; place-items: center; filter: drop-shadow(0 0 14px var(--red-glow)); }
.brand__text { display: flex; flex-direction: column; line-height: 1.1; }
.brand__text b { font-size: 1.06rem; letter-spacing: .06em; }
.brand__text i {
  font-style: normal; font-size: .6rem; letter-spacing: .32em;
  color: var(--muted-2); margin-top: 3px;
}

.nav__links { display: flex; align-items: center; gap: 6px; }
.nav__links a {
  position: relative; padding: 8px 14px; font-size: .92rem; color: var(--muted);
  border-radius: 999px; transition: color .3s var(--ease), background .3s var(--ease);
}
.nav__links a:hover { color: var(--text); background: rgba(255,255,255,.05); }
.nav__links a.is-active { color: var(--text); }
.nav__links a.is-active::after {
  content: ""; position: absolute; left: 50%; bottom: 2px; transform: translateX(-50%);
  width: 18px; height: 2px; border-radius: 2px;
  background: var(--red); box-shadow: 0 0 10px var(--red);
}
.nav__links sup { color: var(--red); }

.nav__toggle {
  display: none; flex-direction: column; gap: 5px; width: 42px; height: 42px;
  border: 1px solid var(--line); border-radius: 12px; background: rgba(255,255,255,.03);
  align-items: center; justify-content: center; cursor: pointer;
}
.nav__toggle span {
  width: 18px; height: 2px; background: var(--text); border-radius: 2px;
  transition: transform .35s var(--ease), opacity .35s var(--ease);
}
.nav.is-open .nav__toggle span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav.is-open .nav__toggle span:nth-child(2) { opacity: 0; }
.nav.is-open .nav__toggle span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ---------------------------- Hero ---------------------------- */
.hero {
  position: relative; max-width: var(--maxw); margin: 0 auto;
  padding: 190px 24px 100px;
  display: grid; grid-template-columns: 1.15fr .85fr; gap: 40px; align-items: center;
  min-height: 100vh;
}
.hero__title {
  font-size: clamp(2.6rem, 6.4vw, 5.2rem); line-height: 1.06;
  font-weight: 900; letter-spacing: -.03em; margin: 26px 0 28px;
}
.hero__title span { display: block; }
.hero__desc { color: var(--muted); font-size: 1.08rem; max-width: 560px; }
.hero__actions { display: flex; flex-wrap: wrap; gap: 16px; margin-top: 38px; }

.hero__stats {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px;
  margin-top: 72px; padding-top: 36px; border-top: 1px solid var(--line);
}
.stat b {
  display: block; font-size: clamp(1.6rem, 3vw, 2.3rem); font-weight: 800;
  background: linear-gradient(180deg, #fff, var(--red-soft));
  -webkit-background-clip: text; background-clip: text; color: transparent;
  font-variant-numeric: tabular-nums;
}
.stat span { font-size: .82rem; color: var(--muted-2); letter-spacing: .05em; }

/* Hero 视觉 */
.hero__visual { position: relative; display: grid; place-items: center; min-height: 460px; }
.orb { position: relative; width: min(400px, 82%); aspect-ratio: 1; display: grid; place-items: center; }
.orb__ring {
  position: absolute; inset: 0; border-radius: 50%;
  border: 1px solid rgba(255, 45, 63, .35);
  box-shadow: inset 0 0 60px rgba(255, 45, 63, .14), 0 0 60px rgba(255, 45, 63, .1);
  animation: spin 22s linear infinite;
}
.orb__ring::before {
  content: ""; position: absolute; top: -4px; left: 50%; width: 8px; height: 8px;
  border-radius: 50%; background: var(--red); box-shadow: 0 0 16px var(--red);
}
.orb__ring--2 { inset: 34px; animation-duration: 16s; animation-direction: reverse; border-style: dashed; }
@keyframes spin { to { transform: rotate(360deg); } }

.orb__core {
  width: 54%; aspect-ratio: 1; border-radius: 50%;
  background: radial-gradient(circle at 50% 40%, rgba(255,45,63,.28), rgba(10,10,12,.2) 70%);
  border: 1px solid rgba(255, 45, 63, .3);
  display: grid; place-items: center; padding: 14%;
  box-shadow: 0 0 90px rgba(255, 45, 63, .3), inset 0 0 40px rgba(255, 45, 63, .2);
  animation: breathe 4.5s var(--ease) infinite;
}
@keyframes breathe { 0%,100% { transform: scale(1); } 50% { transform: scale(1.05); } }
.ecg { filter: drop-shadow(0 0 8px var(--red)); stroke-dasharray: 320; stroke-dashoffset: 320; animation: trace 3s var(--ease) infinite; }
@keyframes trace { 0% { stroke-dashoffset: 320; } 60%,100% { stroke-dashoffset: -320; } }

.float-chip {
  position: absolute; padding: 9px 16px; border-radius: 999px;
  font-size: .8rem; color: var(--text);
  background: rgba(20, 20, 26, .8); border: 1px solid var(--line);
  backdrop-filter: blur(10px); box-shadow: 0 10px 30px -12px rgba(0,0,0,.9);
  animation: float 6s var(--ease) infinite;
}
.chip--1 { top: 8%;  left: -4%; }
.chip--2 { bottom: 14%; right: -6%; animation-delay: -2s; }
.chip--3 { bottom: 42%; left: -8%; color: var(--red-soft); border-color: rgba(255,45,63,.4); animation-delay: -4s; }
@keyframes float { 0%,100% { transform: translateY(0); } 50% { transform: translateY(-12px); } }

.hero__scroll {
  position: absolute; bottom: 26px; left: 50%; transform: translateX(-50%);
  display: flex; align-items: center; gap: 10px; font-size: .72rem;
  letter-spacing: .24em; color: var(--muted-2); text-transform: uppercase;
}
.hero__scroll span {
  width: 1px; height: 30px; background: linear-gradient(var(--red), transparent);
  animation: drop 1.8s var(--ease) infinite;
}
@keyframes drop { 0% { transform: scaleY(.3); opacity: 0; } 40% { opacity: 1; } 100% { transform: scaleY(1); opacity: 0; } }

/* ---------------------------- Marquee ---------------------------- */
.marquee {
  border-block: 1px solid var(--line);
  background: linear-gradient(90deg, transparent, rgba(255,45,63,.06), transparent);
  overflow: hidden; padding: 20px 0;
}
.marquee__track {
  display: flex; gap: 26px; align-items: center; width: max-content;
  animation: slide 32s linear infinite;
  font-size: 1.1rem; font-weight: 700; letter-spacing: .1em; color: var(--muted);
}
.marquee__track i { color: var(--red); font-style: normal; }
@keyframes slide { to { transform: translateX(-50%); } }

/* ---------------------------- 故事 IP ---------------------------- */
.ip__grid { display: grid; grid-template-columns: .92fr 1.08fr; gap: 56px; align-items: center; }

.ip__figure {
  position: relative; border-radius: var(--radius); overflow: hidden;
  border: 1px solid var(--line); background: var(--bg-card);
  box-shadow: 0 40px 90px -40px rgba(0,0,0,.9);
}
.ip__figure img { width: 100%; aspect-ratio: 4/5; object-fit: cover; object-position: 50% 20%; transition: transform 1s var(--ease); }
.ip__figure:hover img { transform: scale(1.04); }
.ip__figure::after {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(to top, rgba(10,10,12,.96) 4%, transparent 52%);
}
.ip__figure figcaption {
  position: absolute; left: 26px; bottom: 24px; z-index: 2;
  display: flex; flex-direction: column; gap: 4px;
}
.ip__figure figcaption .tag {
  align-self: flex-start; font-size: .68rem; letter-spacing: .2em;
  padding: 4px 12px; border-radius: 999px; color: var(--red-soft);
  border: 1px solid rgba(255,45,63,.45); background: rgba(255,45,63,.1);
  margin-bottom: 8px;
}
.ip__figure figcaption b { font-size: 1.7rem; font-weight: 800; letter-spacing: .04em; }
.ip__figure figcaption i { font-style: normal; font-size: .78rem; letter-spacing: .16em; color: var(--muted); }
.ip__figure-glow {
  position: absolute; inset: -30% -30% auto auto; width: 60%; aspect-ratio: 1;
  background: radial-gradient(circle, rgba(255,45,63,.5), transparent 65%);
  filter: blur(40px); z-index: 1; pointer-events: none;
}

.ip__chapters { display: flex; flex-direction: column; gap: 8px; }
.chapter {
  display: flex; gap: 22px; padding: 24px 22px; border-radius: var(--radius-sm);
  border: 1px solid transparent; transition: background .4s var(--ease), border-color .4s var(--ease), transform .4s var(--ease);
}
.chapter:hover {
  background: linear-gradient(90deg, rgba(255,45,63,.09), transparent 70%);
  border-color: rgba(255,45,63,.24); transform: translateX(6px);
}
.chapter__no {
  font-size: .86rem; font-weight: 800; letter-spacing: .12em; color: var(--red);
  padding-top: 4px; min-width: 34px;
  font-variant-numeric: tabular-nums;
}
.chapter h3 { font-size: 1.16rem; margin-bottom: 8px; letter-spacing: .02em; }
.chapter p { color: var(--muted); font-size: .95rem; }

/* ---------------------------- 核心科技 ---------------------------- */
.tech__grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 22px; }
.tech-card {
  position: relative; padding: 38px 34px 42px; border-radius: var(--radius);
  background: linear-gradient(160deg, var(--bg-card), var(--bg-soft));
  border: 1px solid var(--line); overflow: hidden;
  transition: transform .5s var(--ease), border-color .5s var(--ease), box-shadow .5s var(--ease);
}
.tech-card::before {
  content: ""; position: absolute; inset: 0; opacity: 0;
  background: radial-gradient(420px 220px at 12% 0%, rgba(255,45,63,.22), transparent 70%);
  transition: opacity .5s var(--ease);
}
.tech-card:hover { transform: translateY(-8px); border-color: rgba(255,45,63,.4); box-shadow: 0 30px 70px -34px var(--red-glow); }
.tech-card:hover::before { opacity: 1; }
.tech-card__icon {
  position: relative; z-index: 1; display: grid; place-items: center;
  width: 60px; height: 60px; border-radius: 16px; font-size: 1.6rem; font-weight: 800;
  color: var(--red-soft); border: 1px solid rgba(255,45,63,.4);
  background: rgba(255,45,63,.09); margin-bottom: 24px;
  box-shadow: inset 0 0 22px rgba(255,45,63,.16);
}
.tech-card h3 { position: relative; z-index: 1; font-size: 1.3rem; margin-bottom: 10px; }
.tech-card p { position: relative; z-index: 1; color: var(--muted); font-size: .95rem; max-width: 90%; }
.tech-card__index {
  position: absolute; top: 26px; right: 30px; font-size: 2.6rem; font-weight: 900;
  color: rgba(255,255,255,.05); letter-spacing: -.04em; font-variant-numeric: tabular-nums;
}

/* ---------------------------- 产品 ---------------------------- */
.product__grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.product-card {
  position: relative; border-radius: var(--radius); overflow: hidden;
  background: linear-gradient(160deg, var(--bg-card), var(--bg-soft));
  border: 1px solid var(--line); padding: 34px 30px;
  transition: transform .5s var(--ease), border-color .5s var(--ease), box-shadow .5s var(--ease);
}
.product-card:hover { transform: translateY(-8px); border-color: rgba(255,45,63,.4); box-shadow: 0 30px 70px -34px var(--red-glow); }
.product-card--feature { grid-column: span 3; display: grid; grid-template-columns: 1.3fr .7fr; align-items: center; gap: 40px; padding: 48px 46px; }

.badge {
  display: inline-block; font-size: .68rem; letter-spacing: .16em; text-transform: uppercase;
  padding: 5px 13px; border-radius: 999px; margin-bottom: 18px;
  color: #fff; background: linear-gradient(100deg, var(--red-soft), var(--red-deep));
  box-shadow: 0 6px 20px -8px var(--red-glow);
}
.badge--soft { color: var(--red-soft); background: rgba(255,45,63,.1); border: 1px solid rgba(255,45,63,.35); box-shadow: none; }

.product-card h3 { font-size: 1.42rem; margin-bottom: 12px; letter-spacing: .01em; }
.product-card--feature h3 { font-size: clamp(1.7rem, 3vw, 2.2rem); }
.product-card p { color: var(--muted); font-size: .95rem; }
.product-card__list { display: flex; flex-wrap: wrap; gap: 10px; margin: 20px 0 28px; }
.product-card__list li {
  font-size: .84rem; color: var(--text); padding: 7px 14px; border-radius: 999px;
  border: 1px solid var(--line); background: rgba(255,255,255,.03);
}

.product-card__art { display: grid; place-items: center; }
.pulse-device {
  position: relative; width: min(230px, 70%); aspect-ratio: 1; border-radius: 50%;
  border: 1px solid rgba(255,45,63,.4);
  background: radial-gradient(circle at 50% 40%, rgba(255,45,63,.22), transparent 68%);
  display: grid; place-items: center;
  box-shadow: 0 0 80px rgba(255,45,63,.22), inset 0 0 50px rgba(255,45,63,.16);
}
.pulse-device::before, .pulse-device::after {
  content: ""; position: absolute; border-radius: 50%; border: 1px solid rgba(255,45,63,.35);
  animation: ripple 3.2s var(--ease) infinite;
}
.pulse-device::before { inset: 20%; }
.pulse-device::after { inset: 4%; animation-delay: -1.6s; }
@keyframes ripple { 0% { transform: scale(.75); opacity: .9; } 100% { transform: scale(1.25); opacity: 0; } }
.pulse-device span {
  width: 26%; aspect-ratio: 1; border-radius: 50%;
  background: radial-gradient(circle at 40% 35%, var(--red-soft), var(--red-deep));
  box-shadow: 0 0 40px var(--red);
}

.product__note {
  margin-top: 34px; font-size: .86rem; color: var(--muted-2);
  display: flex; align-items: center; gap: 10px;
}
.reg-mark { color: var(--red); font-size: 1.1rem; }

/* ---------------------------- 关于 ---------------------------- */
.about__grid { display: grid; grid-template-columns: 1.1fr .9fr; gap: 56px; align-items: start; }
.about__copy h2 { font-size: clamp(1.9rem, 3.8vw, 2.9rem); line-height: 1.2; margin: 20px 0 24px; font-weight: 800; letter-spacing: -.02em; }
.about__copy p { color: var(--muted); margin-bottom: 18px; max-width: 520px; }
.about__values { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; margin-top: 40px; padding-top: 32px; border-top: 1px solid var(--line); }
.about__values div b { display: block; font-size: 1.3rem; color: var(--red-soft); margin-bottom: 6px; }
.about__values div span { font-size: .84rem; color: var(--muted-2); }

.about__panel {
  border-radius: var(--radius); border: 1px solid var(--line);
  background: linear-gradient(160deg, var(--bg-card), var(--bg-soft));
  padding: 12px 30px; box-shadow: 0 40px 90px -50px rgba(0,0,0,.9);
}
.panel__row {
  display: flex; flex-direction: column; gap: 6px; padding: 22px 0;
  border-bottom: 1px solid var(--line-soft);
}
.panel__row:last-child { border-bottom: none; }
.panel__row span { font-size: .72rem; letter-spacing: .22em; color: var(--red); text-transform: uppercase; }
.panel__row b { font-size: 1.02rem; font-weight: 600; line-height: 1.5; }

/* ---------------------------- 联系 ---------------------------- */
.contact__card {
  position: relative; overflow: hidden; text-align: center;
  border-radius: 28px; border: 1px solid rgba(255,45,63,.28);
  background: linear-gradient(160deg, rgba(255,45,63,.09), rgba(15,15,20,.9) 55%);
  padding: 80px 40px;
}
.contact__glow {
  position: absolute; top: -50%; left: 50%; transform: translateX(-50%);
  width: 70%; aspect-ratio: 1;
  background: radial-gradient(circle, rgba(255,45,63,.35), transparent 65%);
  filter: blur(60px); pointer-events: none;
}
.contact__card h2 { position: relative; font-size: clamp(1.9rem, 4vw, 3rem); line-height: 1.2; margin: 20px 0 18px; font-weight: 800; letter-spacing: -.02em; }
.contact__desc { position: relative; color: var(--muted); max-width: 560px; margin: 0 auto 38px; }
.contact__actions { position: relative; display: flex; justify-content: center; flex-wrap: wrap; gap: 16px; }
.contact__meta {
  position: relative; display: flex; justify-content: center; flex-wrap: wrap; gap: 12px; margin-top: 42px;
}
.contact__meta li {
  font-size: .84rem; color: var(--muted); padding: 8px 16px; border-radius: 999px;
  border: 1px solid var(--line); background: rgba(255,255,255,.03);
}

/* ---------------------------- 页脚 ---------------------------- */
.footer { border-top: 1px solid var(--line); background: var(--bg-soft); }
.footer__inner {
  max-width: var(--maxw); margin: 0 auto; padding: 68px 24px 40px;
  display: grid; grid-template-columns: 1.2fr 1.8fr; gap: 48px;
}
.footer__brand b { font-size: 1.35rem; letter-spacing: .05em; display: block; }
.footer__brand i { font-style: normal; font-size: .66rem; letter-spacing: .34em; color: var(--muted-2); }
.footer__brand p { margin-top: 16px; color: var(--muted); font-size: .92rem; }
.footer__cols { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.footer__cols h4 { font-size: .8rem; letter-spacing: .16em; text-transform: uppercase; color: var(--muted-2); margin-bottom: 16px; }
.footer__cols a { display: block; color: var(--muted); font-size: .92rem; padding: 6px 0; transition: color .3s var(--ease), transform .3s var(--ease); }
.footer__cols a:hover { color: var(--red-soft); transform: translateX(4px); }
.footer__bar {
  border-top: 1px solid var(--line); max-width: var(--maxw); margin: 0 auto;
  padding: 22px 24px; display: flex; justify-content: space-between; flex-wrap: wrap; gap: 10px;
  font-size: .8rem; color: var(--muted-2);
}
.footer__bar sup { color: var(--red); }

/* ---------------------------- 滚动揭示 ---------------------------- */
.reveal { opacity: 0; transform: translateY(34px); transition: opacity .9s var(--ease), transform .9s var(--ease); }
.reveal.is-visible { opacity: 1; transform: none; }

/* ---------------------------- 响应式 ---------------------------- */
@media (max-width: 1024px) {
  .section { padding: 96px 24px; }
  .hero { grid-template-columns: 1fr; padding-top: 160px; text-align: left; min-height: auto; gap: 60px; }
  .hero__visual { min-height: 380px; }
  .ip__grid, .about__grid { grid-template-columns: 1fr; gap: 44px; }
  .product-card--feature { grid-column: span 3; grid-template-columns: 1fr; }
  .product__grid { grid-template-columns: repeat(2, 1fr); }
  .footer__inner { grid-template-columns: 1fr; gap: 40px; }
}

@media (max-width: 820px) {
  .nav__links {
    position: fixed; inset: 0 0 auto 0; top: 68px; flex-direction: column; align-items: stretch;
    gap: 4px; padding: 18px 20px 26px; margin: 0 12px; border-radius: 18px;
    background: rgba(14,14,18,.96); border: 1px solid var(--line);
    backdrop-filter: blur(20px);
    opacity: 0; visibility: hidden; transform: translateY(-12px);
    transition: opacity .35s var(--ease), transform .35s var(--ease), visibility .35s;
  }
  .nav.is-open .nav__links { opacity: 1; visibility: visible; transform: none; }
  .nav__links a { padding: 14px 16px; font-size: 1rem; }
  .nav__links a.is-active::after { display: none; }
  .nav__links a.is-active { background: rgba(255,45,63,.12); color: var(--red-soft); }
  .nav__toggle { display: flex; }
  .nav__cta { display: none; }

  .tech__grid { grid-template-columns: 1fr; }
  .product__grid { grid-template-columns: 1fr; }
  .product-card--feature { grid-column: span 1; padding: 38px 28px; }
  .hero__stats { grid-template-columns: repeat(2, 1fr); gap: 28px 20px; }
  .about__values { grid-template-columns: 1fr; gap: 22px; }
  .contact__card { padding: 60px 26px; }
  .footer__cols { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 520px) {
  .hero { padding-top: 140px; }
  .float-chip { display: none; }
  .section { padding: 84px 20px; }
  .btn { padding: 13px 22px; font-size: .9rem; }
}

/* ---------------------------- 无障碍 ---------------------------- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .001ms !important; animation-iteration-count: 1 !important; transition-duration: .001ms !important; }
  .reveal { opacity: 1; transform: none; }
  html { scroll-behavior: auto; }
}