/* ============================================================
   Smile for Smart — Normal Technology
   styles.css · 中文主站
   ------------------------------------------------------------
   目录
   01. 字体
   02. 变量与基础
   03. 通用组件
   04. 环境层（极光 / 尘埃 / 聚光 / 进度）
   05. 导航
   06. 首屏
   07. 跑马灯
   08. 为什么
   09. 结构（爆炸图）
   10. 能力
   11. 适老化
   12. 参数
   13. 专利
   14. 价格
   15. FAQ
   16. 预约
   17. 页脚
   18. 证书弹窗
   19. 动效与降级
   20. 断点
   ============================================================ */

/* ---------- 01. 字体 ---------- */
@font-face {
  font-family: "Inter";
  src: url("vendor/fonts/Inter-Regular.woff2") format("woff2");
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: "Inter";
  src: url("vendor/fonts/Inter-Medium.woff2") format("woff2");
  font-weight: 500;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: "Inter";
  src: url("vendor/fonts/Inter-SemiBold.woff2") format("woff2");
  font-weight: 600;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: "InterDisplay";
  src: url("vendor/fonts/InterDisplay-Bold.woff2") format("woff2");
  font-weight: 700;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: "InterDisplay";
  src: url("vendor/fonts/InterDisplay-Black.woff2") format("woff2");
  font-weight: 900;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: "Noto Sans SC";
  src: url("vendor/fonts/NotoSansSC-VF.woff2") format("woff2");
  font-weight: 100 900;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: "JetBrains Mono";
  src: url("vendor/fonts/JetBrainsMono-Regular.woff2") format("woff2");
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: "JetBrains Mono";
  src: url("vendor/fonts/JetBrainsMono-Medium.woff2") format("woff2");
  font-weight: 500;
  font-style: normal;
  font-display: swap;
}

/* ---------- 02. 变量与基础 ---------- */
:root {
  --bg: #07080a;
  --bg-2: #0b0d11;
  --panel: #0e1116;
  --ink: #f3efe6;
  --muted: #a4a29b;
  --muted-2: #8a8882;
  --amber: #ffc24b;
  --amber-2: #ff9e2c;
  --teal: #4fe3c1;
  --line: rgba(243, 239, 230, 0.1);
  --line-soft: rgba(243, 239, 230, 0.06);
  --surface: rgba(255, 255, 255, 0.035);
  --surface-2: rgba(255, 255, 255, 0.055);
  --radius: 20px;
  --radius-lg: 26px;
  --container: 1320px;
  --pad: clamp(20px, 4vw, 56px);
  --sans: "Inter", "Noto Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, sans-serif;
  --display: "InterDisplay", "Inter", "Noto Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --nav-h: 78px;
}

*,
*::before,
*::after { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--nav-h) + 16px);
  -webkit-text-size-adjust: 100%;
  background: var(--bg);
}

html,
body { overflow-x: clip; }

body {
  margin: 0;
  min-height: 100%;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.7;
  font-feature-settings: "kern" 1, "liga" 1, "calt" 1;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  position: relative;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background:
    radial-gradient(90% 60% at 50% -10%, rgba(255, 194, 75, 0.055), transparent 60%),
    radial-gradient(70% 50% at 100% 30%, rgba(79, 227, 193, 0.03), transparent 65%);
}

img,
svg { display: block; max-width: 100%; }

a { color: inherit; text-decoration: none; }

button,
input,
select { font: inherit; color: inherit; }

button { cursor: pointer; }

h1, h2, h3, h4, p, figure, blockquote, dl, dd { margin: 0; }

ul, ol { margin: 0; padding: 0; list-style: none; }

::selection { background: rgba(255, 194, 75, 0.92); color: #171006; }

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

.sprite {
  position: absolute;
  width: 0;
  height: 0;
  overflow: hidden;
}

.skip {
  position: fixed;
  top: 10px;
  left: 10px;
  z-index: 200;
  padding: 10px 16px;
  border-radius: 8px;
  background: var(--amber);
  color: #171006;
  font-weight: 600;
  transform: translateY(-160%);
  transition: transform 0.2s var(--ease);
}
.skip:focus { transform: translateY(0); }

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* ---------- 03. 通用组件 ---------- */
.container {
  width: min(var(--container), 100% - var(--pad) * 2);
  margin-inline: auto;
}

.section {
  position: relative;
  z-index: 2;
  padding-block: clamp(88px, 10vw, 150px);
}

.mono {
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 400;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted-2);
}

.ico {
  width: 18px;
  height: 18px;
  flex: none;
  color: currentColor;
}

.eyebrow {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--muted);
}
.eyebrow .num {
  color: var(--amber);
  letter-spacing: 0.1em;
}
.eyebrow .num::after {
  content: "/";
  margin-left: 10px;
  color: var(--muted-2);
}

.pulse {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--amber);
  box-shadow: 0 0 0 0 rgba(255, 194, 75, 0.55);
  animation: pulse 2.6s var(--ease) infinite;
}
@keyframes pulse {
  0% { box-shadow: 0 0 0 0 rgba(255, 194, 75, 0.5); }
  70% { box-shadow: 0 0 0 9px rgba(255, 194, 75, 0); }
  100% { box-shadow: 0 0 0 0 rgba(255, 194, 75, 0); }
}

.display {
  font-family: var(--display);
  font-weight: 700;
  letter-spacing: -0.035em;
  line-height: 0.98;
}

.h2 {
  font-family: var(--display);
  font-weight: 700;
  font-size: clamp(2rem, 4.2vw, 3.5rem);
  line-height: 1.08;
  letter-spacing: -0.03em;
  text-wrap: balance;
}
.h2--xl {
  font-size: clamp(2.6rem, 6.2vw, 5.2rem);
  letter-spacing: -0.04em;
  line-height: 1;
}
.h2--md {
  font-size: clamp(1.75rem, 3.2vw, 2.6rem);
}

.dot-end {
  display: inline-block;
  width: 0.17em;
  height: 0.17em;
  margin-left: 0.09em;
  border-radius: 50%;
  background: var(--amber);
  box-shadow: 0 0 0.5em rgba(255, 194, 75, 0.35);
  vertical-align: baseline;
}

.lede {
  max-width: 62ch;
  color: var(--muted);
  font-size: clamp(15px, 1.05vw, 17px);
  line-height: 1.8;
  text-wrap: pretty;
}
.lede--sm { font-size: 14.5px; line-height: 1.75; }

.sec-head {
  max-width: 960px;
  margin-bottom: clamp(40px, 5vw, 72px);
}
.sec-head .h2 { margin: 18px 0 22px; }
.sec-head--row {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(0, 0.65fr);
  gap: clamp(24px, 4vw, 64px);
  align-items: end;
  max-width: none;
}
.sec-head--row .lede { max-width: 44ch; padding-bottom: 6px; }
.sec-head--tight { margin-bottom: clamp(24px, 3vw, 40px); }

.btn {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  min-height: 48px;
  padding: 0 24px;
  border: 1px solid transparent;
  border-radius: 999px;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.01em;
  white-space: nowrap;
  transition: transform 0.35s var(--ease), background-color 0.35s var(--ease),
    border-color 0.35s var(--ease), box-shadow 0.35s var(--ease), color 0.35s var(--ease);
}
.btn--primary {
  background: linear-gradient(180deg, #ffd27a, var(--amber) 55%, #f2ac2c);
  color: #1a1204;
  box-shadow: 0 1px 0 rgba(255, 255, 255, 0.35) inset, 0 10px 30px -12px rgba(255, 170, 40, 0.6);
}
.btn--primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 1px 0 rgba(255, 255, 255, 0.4) inset, 0 18px 38px -14px rgba(255, 170, 40, 0.75);
}
.btn--ghost {
  border-color: var(--line);
  background: rgba(255, 255, 255, 0.03);
  color: var(--ink);
}
.btn--ghost:hover {
  border-color: rgba(243, 239, 230, 0.28);
  background: rgba(255, 255, 255, 0.06);
  transform: translateY(-2px);
}
.btn--sm { min-height: 38px; padding: 0 18px; font-size: 13px; }
.btn--block { width: 100%; }
.btn__meta {
  font-family: var(--mono);
  font-size: 10px;
  font-weight: 400;
  letter-spacing: 0.06em;
  opacity: 0.7;
  padding-left: 10px;
  border-left: 1px solid rgba(26, 18, 4, 0.22);
}
.btn .ico { width: 16px; height: 16px; }

/* ---------- 04. 环境层 ---------- */
.ambient {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  overflow: hidden;
}
.aurora {
  position: absolute;
  border-radius: 50%;
  filter: blur(90px);
  opacity: 0.55;
  will-change: transform;
}
.aurora--a {
  width: 52vw;
  height: 52vw;
  top: -26vw;
  left: 8vw;
  background: radial-gradient(circle at 50% 50%, rgba(255, 176, 60, 0.28), transparent 68%);
  animation: drift-a 26s ease-in-out infinite alternate;
}
.aurora--b {
  width: 46vw;
  height: 46vw;
  top: 24vh;
  right: -18vw;
  background: radial-gradient(circle at 50% 50%, rgba(64, 220, 196, 0.16), transparent 70%);
  animation: drift-b 32s ease-in-out infinite alternate;
}
.aurora--c {
  width: 40vw;
  height: 40vw;
  bottom: -22vw;
  left: 20vw;
  background: radial-gradient(circle at 50% 50%, rgba(255, 120, 40, 0.11), transparent 70%);
  animation: drift-c 38s ease-in-out infinite alternate;
}
@keyframes drift-a {
  to { transform: translate3d(6vw, 4vh, 0) scale(1.15); }
}
@keyframes drift-b {
  to { transform: translate3d(-5vw, -6vh, 0) scale(1.1); }
}
@keyframes drift-c {
  to { transform: translate3d(4vw, -4vh, 0) scale(1.2); }
}
.grain {
  position: absolute;
  inset: -50%;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='.5'/%3E%3C/svg%3E");
  opacity: 0.05;
  mix-blend-mode: overlay;
}

.dust {
  position: fixed;
  inset: 0;
  z-index: 1;
  width: 100%;
  height: 100%;
  pointer-events: none;
  opacity: 0.55;
}

.spotlight {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 2;
  width: 760px;
  height: 760px;
  margin: -380px 0 0 -380px;
  border-radius: 50%;
  pointer-events: none;
  opacity: 0;
  background:
    radial-gradient(circle at 50% 50%, rgba(255, 200, 110, 0.085), transparent 62%),
    radial-gradient(circle at 50% 50%, rgba(79, 227, 193, 0.05), transparent 75%);
  transition: opacity 0.6s var(--ease);
  will-change: transform;
}
.spotlight.is-on { opacity: 1; }

.progress {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 60;
  height: 2px;
  background: transparent;
  pointer-events: none;
}
.progress i {
  display: block;
  height: 100%;
  width: 0;
  background: linear-gradient(90deg, var(--amber-2), var(--amber), var(--teal));
  box-shadow: 0 0 12px rgba(255, 194, 75, 0.5);
}

/* ---------- 05. 导航 ---------- */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 50;
  height: var(--nav-h);
  display: flex;
  align-items: center;
  border-bottom: 1px solid transparent;
  transition: background-color 0.4s var(--ease), border-color 0.4s var(--ease),
    backdrop-filter 0.4s var(--ease);
}
.nav.is-stuck {
  background: rgba(7, 8, 10, 0.72);
  border-bottom-color: var(--line-soft);
  backdrop-filter: blur(18px) saturate(140%);
  -webkit-backdrop-filter: blur(18px) saturate(140%);
}
.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  flex: none;
}
.brand__mark {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  box-shadow: 0 0 0 1px rgba(255, 194, 75, 0.18), 0 8px 24px -10px rgba(255, 194, 75, 0.45);
}
.brand__text { display: flex; flex-direction: column; line-height: 1.25; }
.brand__text strong {
  font-family: var(--display);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: -0.01em;
}
.brand__text span {
  font-family: var(--mono);
  font-size: 8.5px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--muted-2);
}

.nav__links {
  display: flex;
  align-items: center;
  gap: clamp(14px, 2vw, 30px);
  margin-left: auto;
}
.nav__links a {
  position: relative;
  font-size: 13px;
  color: var(--muted);
  padding: 8px 2px;
  transition: color 0.25s var(--ease);
}
.nav__links a::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 2px;
  height: 1px;
  background: var(--amber);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.35s var(--ease);
}
.nav__links a:hover,
.nav__links a.is-active { color: var(--ink); }
.nav__links a:hover::after,
.nav__links a.is-active::after { transform: scaleX(1); }
.nav__actions { display: flex; align-items: center; gap: 14px; }
.lang {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--muted);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 7px 12px;
  transition: color 0.25s, border-color 0.25s, background 0.25s;
}
.lang:hover { color: var(--ink); border-color: rgba(243, 239, 230, 0.26); background: rgba(255, 255, 255, 0.04); }
.nav__toggle {
  display: none;
  width: 42px;
  height: 42px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: transparent;
  position: relative;
}
.nav__toggle span {
  position: absolute;
  left: 12px;
  right: 12px;
  height: 1.5px;
  background: var(--ink);
  transition: transform 0.35s var(--ease), top 0.35s var(--ease);
}
.nav__toggle span:nth-child(1) { top: 17px; }
.nav__toggle span:nth-child(2) { top: 23px; }
.nav__toggle[aria-expanded="true"] span:nth-child(1) { top: 20px; transform: rotate(45deg); }
.nav__toggle[aria-expanded="true"] span:nth-child(2) { top: 20px; transform: rotate(-45deg); }

/* ---------- 06. 首屏 ---------- */
.hero {
  position: relative;
  z-index: 2;
  min-height: 100svh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding-top: calc(var(--nav-h) + clamp(20px, 4vh, 48px));
  padding-bottom: 20px;
}
.hero__inner {
  display: grid;
  grid-template-columns: minmax(0, 1.02fr) minmax(0, 0.98fr);
  align-items: center;
  gap: clamp(28px, 4vw, 64px);
  flex: 1;
}
.hero__title {
  font-size: clamp(2.95rem, 6.9vw, 6.5rem);
  margin: 18px 0 26px;
  letter-spacing: -0.045em;
}
.hero__title .char { display: inline-block; will-change: transform; }
.hero__lede {
  max-width: 35em;
  color: var(--muted);
  font-size: clamp(15px, 1.1vw, 17px);
  line-height: 1.8;
}
.hero__cta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  margin-top: 34px;
}
.hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 24px;
  margin-top: 34px;
  padding-top: 22px;
  border-top: 1px solid var(--line-soft);
  max-width: 520px;
}
.hero__meta li {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  color: var(--muted);
}
.hero__meta .ico { width: 15px; height: 15px; color: var(--amber); }

.hero__visual { position: relative; }
.plate {
  position: relative;
  padding: 14px 14px 0;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background:
    radial-gradient(120% 100% at 62% 22%, rgba(255, 194, 75, 0.12), transparent 55%),
    radial-gradient(80% 90% at 15% 100%, rgba(79, 227, 193, 0.06), transparent 60%),
    linear-gradient(180deg, #0d1015, #08090b);
  box-shadow: 0 40px 80px -40px rgba(0, 0, 0, 0.8), 0 0 0 1px rgba(255, 255, 255, 0.02) inset;
  overflow: hidden;
}
.plate::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(243, 239, 230, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(243, 239, 230, 0.05) 1px, transparent 1px);
  background-size: 40px 40px;
  mask-image: radial-gradient(80% 80% at 50% 45%, #000 30%, transparent 78%);
  -webkit-mask-image: radial-gradient(80% 80% at 50% 45%, #000 30%, transparent 78%);
  opacity: 0.7;
}
.plate__bar,
.plate__foot {
  position: relative;
  z-index: 2;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  font-family: var(--mono);
  font-size: 9px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted-2);
}
.plate__bar { padding: 2px 6px 12px; }
.plate__live { display: inline-flex; align-items: center; gap: 6px; color: var(--teal); }
.plate__live i {
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--teal);
  box-shadow: 0 0 10px var(--teal);
  animation: blink 2.4s ease-in-out infinite;
}
@keyframes blink { 50% { opacity: 0.25; } }
.product {
  position: relative;
  z-index: 1;
  width: 100%;
  height: auto;
  padding: 4px 0 10px;
  filter: drop-shadow(0 26px 30px rgba(0, 0, 0, 0.55));
}
.product__hud path { stroke-width: 1; }
.svg-label {
  font-family: var(--mono);
  font-size: 15px;
  letter-spacing: 0.18em;
  fill: rgba(243, 239, 230, 0.42);
}
.plate__foot {
  padding: 10px 6px 12px;
  border-top: 1px solid var(--line-soft);
  justify-content: flex-start;
  gap: 18px;
}
.plate__foot-end { margin-left: auto; color: var(--amber); }
.plate__corner {
  position: absolute;
  width: 12px;
  height: 12px;
  border-color: rgba(255, 194, 75, 0.5);
  border-style: solid;
  z-index: 3;
}
.plate__corner--tl { top: 9px; left: 9px; border-width: 1px 0 0 1px; }
.plate__corner--tr { top: 9px; right: 9px; border-width: 1px 1px 0 0; }
.plate__corner--bl { bottom: 9px; left: 9px; border-width: 0 0 1px 1px; }
.plate__corner--br { bottom: 9px; right: 9px; border-width: 0 1px 1px 0; }

.chip {
  position: absolute;
  z-index: 4;
  display: flex;
  align-items: center;
  gap: 9px;
  padding: 10px 14px;
  border: 1px solid rgba(243, 239, 230, 0.14);
  border-radius: 14px;
  background: rgba(12, 14, 18, 0.78);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: 0 16px 40px -18px rgba(0, 0, 0, 0.9);
  animation: float 7s ease-in-out infinite;
}
.chip__k {
  font-family: var(--display);
  font-size: 22px;
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--ink);
}
.chip__u {
  font-family: var(--mono);
  font-size: 9px;
  line-height: 1.35;
  letter-spacing: 0.06em;
  color: var(--muted);
  text-transform: uppercase;
}
.chip__u em { font-style: normal; color: var(--muted-2); font-size: 8px; }
.chip--speed { top: -18px; right: 6%; animation-delay: -1s; }
.chip--noise { bottom: 17%; left: -24px; animation-delay: -3.4s; }
.chip--lift { bottom: -20px; right: 10%; animation-delay: -5s; }
@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-7px); }
}

.hero__foot {
  display: flex;
  align-items: center;
  gap: 16px;
  padding-top: 28px;
  font-size: 9px;
}
.hero__foot .mono { font-size: 9px; }
.hero__line {
  flex: 1;
  height: 1px;
  background: linear-gradient(90deg, var(--line), transparent);
}

/* ---------- 07. 跑马灯 ---------- */
.ticker {
  position: relative;
  z-index: 2;
  border-block: 1px solid var(--line-soft);
  padding-block: 18px;
  overflow: hidden;
  background: rgba(255, 255, 255, 0.014);
  mask-image: linear-gradient(90deg, transparent, #000 8%, #000 92%, transparent);
  -webkit-mask-image: linear-gradient(90deg, transparent, #000 8%, #000 92%, transparent);
}
.ticker__track {
  display: flex;
  align-items: center;
  gap: 34px;
  width: max-content;
  animation: marquee 46s linear infinite;
}
.ticker__track span {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.24em;
  color: var(--muted-2);
  white-space: nowrap;
}
.ticker__dot {
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--amber);
  opacity: 0.6;
}
@keyframes marquee {
  to { transform: translateX(-50%); }
}
.ticker:hover .ticker__track { animation-play-state: paused; }

/* ---------- 08. 为什么 ---------- */
.why__line {
  margin-top: clamp(48px, 6vw, 88px);
  font-family: var(--display);
  font-size: clamp(1.75rem, 3.8vw, 3.2rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  text-align: center;
  line-height: 1.2;
  text-wrap: balance;
}
.why__line span { color: var(--amber); }

.duo {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}
.duo__card {
  position: relative;
  padding: clamp(26px, 3vw, 44px);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: linear-gradient(165deg, rgba(255, 255, 255, 0.045), rgba(255, 255, 255, 0.012));
  overflow: hidden;
}
.duo__card::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: radial-gradient(340px circle at var(--mx, 50%) var(--my, 0%), rgba(255, 194, 75, 0.1), transparent 70%);
  opacity: 0;
  transition: opacity 0.5s var(--ease);
}
.duo__card:hover::after { opacity: 1; }
.duo__card--warm {
  border-color: rgba(255, 194, 75, 0.22);
  background:
    linear-gradient(165deg, rgba(255, 194, 75, 0.11), rgba(255, 158, 44, 0.02) 45%, rgba(255, 255, 255, 0.01));
}
.duo__ghost {
  position: absolute;
  top: -38px;
  right: 14px;
  font-family: var(--display);
  font-size: clamp(9rem, 16vw, 13rem);
  font-weight: 900;
  line-height: 1;
  color: transparent;
  -webkit-text-stroke: 1px rgba(243, 239, 230, 0.07);
  pointer-events: none;
}
.duo__card--warm .duo__ghost { -webkit-text-stroke-color: rgba(255, 194, 75, 0.13); }
.duo__kicker { margin-bottom: 26px; position: relative; }
.duo__card h3 {
  position: relative;
  font-family: var(--display);
  font-size: clamp(1.35rem, 2.2vw, 1.8rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 14px;
}
.duo__card > p:not(.duo__kicker) {
  position: relative;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.85;
  max-width: 38ch;
}
.duo__list {
  position: relative;
  margin-top: 26px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.duo__list li {
  position: relative;
  padding-left: 20px;
  font-size: 13px;
  color: var(--muted);
}
.duo__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.72em;
  width: 8px;
  height: 1px;
  background: var(--amber);
}
.duo__card--warm .duo__list li::before { background: var(--amber); }

/* ---------- 09. 结构 ---------- */
.anatomy {
  position: relative;
  z-index: 2;
  height: 320vh;
  background:
    radial-gradient(70% 50% at 30% 40%, rgba(255, 194, 75, 0.05), transparent 65%),
    linear-gradient(180deg, rgba(255, 255, 255, 0.012), transparent 30%);
  border-top: 1px solid var(--line-soft);
}
.anatomy__sticky {
  position: sticky;
  top: 0;
  height: 100svh;
  display: flex;
  align-items: center;
  padding-top: var(--nav-h);
  overflow: hidden;
}
.anatomy__inner { width: min(var(--container), 100% - var(--pad) * 2); }
.anatomy__body {
  display: grid;
  grid-template-columns: minmax(0, 1.45fr) minmax(0, 0.8fr);
  gap: clamp(24px, 4vw, 56px);
  align-items: center;
}

.ex {
  position: relative;
  height: clamp(320px, 46vh, 460px);
  border-radius: 18px;
}
.ex__grid {
  position: absolute;
  inset: 6% 4%;
  background-image:
    linear-gradient(rgba(243, 239, 230, 0.055) 1px, transparent 1px),
    linear-gradient(90deg, rgba(243, 239, 230, 0.055) 1px, transparent 1px);
  background-size: 34px 34px;
  mask-image: radial-gradient(70% 70% at 50% 50%, #000 25%, transparent 78%);
  -webkit-mask-image: radial-gradient(70% 70% at 50% 50%, #000 25%, transparent 78%);
  opacity: 0.8;
}
.ex__stage {
  position: absolute;
  inset: 0;
  perspective: 1400px;
  transform-style: preserve-3d;
}
.ex__layer {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  overflow: visible;
  transform-origin: 50% 55%;
  will-change: transform;
  filter: drop-shadow(0 18px 22px rgba(0, 0, 0, 0.45));
}
.ex__axis {
  position: absolute;
  background: rgba(243, 239, 230, 0.1);
}
.ex__axis--x { left: 4%; right: 4%; top: 50%; height: 1px; }
.ex__axis--y { top: 6%; bottom: 6%; left: 50%; width: 1px; }
.ex__axis::after {
  content: "";
  position: absolute;
  width: 5px;
  height: 5px;
  border: 1px solid rgba(255, 194, 75, 0.6);
  border-radius: 50%;
  background: var(--bg);
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
}
.ex__hint {
  position: absolute;
  left: 4%;
  bottom: 0;
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 9px;
  color: var(--muted-2);
}
.ex__hint-dot {
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--amber);
}
.ex__list {
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.ex__item {
  display: flex;
  gap: 16px;
  padding: 13px 16px;
  border-left: 1px solid var(--line);
  opacity: 0.42;
  transition: opacity 0.4s var(--ease), background 0.4s var(--ease), border-color 0.4s var(--ease);
}
.ex__item.is-active {
  opacity: 1;
  border-left-color: var(--amber);
  background: linear-gradient(90deg, rgba(255, 194, 75, 0.07), transparent 85%);
}
.ex__no {
  font-size: 10px;
  color: var(--muted-2);
  padding-top: 3px;
}
.ex__item.is-active .ex__no { color: var(--amber); }
.ex__item h3 {
  font-family: var(--display);
  font-size: 16px;
  font-weight: 700;
  letter-spacing: -0.01em;
  line-height: 1.3;
}
.ex__item p {
  font-size: 12.5px;
  color: var(--muted);
  line-height: 1.55;
  margin-top: 3px;
}
.ex__spec {
  display: block;
  margin-top: 6px;
  font-size: 9px;
  letter-spacing: 0.1em;
  color: var(--muted-2);
}

/* ---------- 10. 能力 ---------- */
.grid { display: grid; gap: 16px; }
.grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.card {
  position: relative;
  display: flex;
  flex-direction: column;
  padding: clamp(24px, 2.4vw, 32px);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(170deg, rgba(255, 255, 255, 0.04), rgba(255, 255, 255, 0.012));
  overflow: hidden;
  transition: border-color 0.4s var(--ease), transform 0.5s var(--ease), background 0.4s var(--ease);
}
.card::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: radial-gradient(300px circle at var(--mx, 50%) var(--my, 0%), rgba(255, 194, 75, 0.11), transparent 68%);
  opacity: 0;
  transition: opacity 0.5s var(--ease);
}
.card:hover { border-color: rgba(255, 194, 75, 0.28); transform: translateY(-4px); }
.card:hover::after { opacity: 1; }
.card__icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 46px;
  height: 46px;
  border: 1px solid rgba(255, 194, 75, 0.24);
  border-radius: 13px;
  background: rgba(255, 194, 75, 0.07);
  color: var(--amber);
}
.card__icon .ico { width: 21px; height: 21px; }
.card h3 {
  position: relative;
  margin: 22px 0 10px;
  font-family: var(--display);
  font-size: clamp(1.05rem, 1.4vw, 1.25rem);
  font-weight: 700;
  letter-spacing: -0.015em;
  line-height: 1.35;
}
.card p {
  position: relative;
  font-size: 13.5px;
  line-height: 1.8;
  color: var(--muted);
  max-width: 34ch;
}
.card__tag {
  position: relative;
  display: block;
  margin-top: auto;
  padding-top: 24px;
  font-size: 9px;
  letter-spacing: 0.14em;
  color: var(--muted-2);
}

/* ---------- 11. 适老化 ---------- */
.aging {
  background:
    radial-gradient(80% 55% at 50% 0%, rgba(255, 194, 75, 0.06), transparent 60%),
    linear-gradient(180deg, #0a0907, #07080a 60%);
  border-block: 1px solid var(--line-soft);
}
.aging .sec-head .lede { max-width: 58ch; }
.quote {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
  gap: clamp(28px, 4vw, 64px);
  align-items: end;
  margin-bottom: clamp(48px, 6vw, 80px);
}
.quote blockquote {
  position: relative;
  padding-left: clamp(20px, 3vw, 34px);
  border-left: 2px solid var(--amber);
}
.quote__mark {
  display: block;
  font-family: var(--display);
  font-size: 64px;
  font-weight: 700;
  line-height: 0.55;
  color: var(--amber);
  opacity: 0.85;
  margin: 6px 0 20px;
}
.quote blockquote p {
  font-family: var(--display);
  font-size: clamp(1.4rem, 2.6vw, 2.15rem);
  font-weight: 700;
  line-height: 1.45;
  letter-spacing: -0.02em;
  max-width: 22ch;
}
.quote figcaption {
  margin-top: 20px;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.1em;
  color: var(--muted-2);
}
.quote__reply {
  color: var(--muted);
  font-size: 14.5px;
  line-height: 1.85;
  padding: clamp(20px, 2.5vw, 30px);
  border: 1px solid var(--line);
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.025);
  margin-bottom: 6px;
}

.principles {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  border-top: 1px solid var(--line);
}
.principle {
  position: relative;
  padding: 28px clamp(16px, 2vw, 28px) 84px;
  border-right: 1px solid var(--line-soft);
  overflow: hidden;
}
.principle:last-child { border-right: 0; }
.principle__k { display: block; margin-bottom: 22px; font-size: 9px; color: var(--amber); }
.principle h3 {
  font-family: var(--display);
  font-size: clamp(1.05rem, 1.5vw, 1.3rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.4;
  margin-bottom: 12px;
}
.principle p { font-size: 13px; line-height: 1.8; color: var(--muted); }
.principle__fig {
  position: absolute;
  right: 10px;
  bottom: 10px;
  font-family: var(--display);
  font-weight: 900;
  font-size: clamp(3rem, 5vw, 4.6rem);
  line-height: 0.85;
  letter-spacing: -0.05em;
  color: transparent;
  -webkit-text-stroke: 1px rgba(255, 194, 75, 0.28);
  pointer-events: none;
}
.principle__fig em {
  font-style: normal;
  font-size: 0.26em;
  letter-spacing: 0.02em;
  -webkit-text-stroke: 0;
  color: rgba(255, 194, 75, 0.5);
  margin-left: 4px;
}

.day {
  margin-top: clamp(48px, 6vw, 80px);
  padding-top: 30px;
  border-top: 1px solid var(--line);
}
.day__head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 20px;
  flex-wrap: wrap;
  margin-bottom: 30px;
}
.day__head h3 {
  font-family: var(--display);
  font-size: clamp(1.3rem, 2vw, 1.7rem);
  font-weight: 700;
  letter-spacing: -0.02em;
}
.day__list {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: clamp(16px, 2vw, 28px);
}
.day__item {
  position: relative;
  padding-top: 22px;
  border-top: 1px solid var(--line);
}
.day__item::before {
  content: "";
  position: absolute;
  top: -3px;
  left: 0;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--amber);
}
.day__time { display: block; font-size: 12px; color: var(--amber); margin-bottom: 12px; }
.day__item h4 {
  font-size: 15px;
  font-weight: 600;
  letter-spacing: -0.01em;
  margin-bottom: 8px;
}
.day__item p { font-size: 12.5px; line-height: 1.75; color: var(--muted); max-width: 32ch; }

/* ---------- 12. 参数 ---------- */
.stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  border-top: 1px solid var(--line);
}
.stat {
  padding: clamp(26px, 3vw, 40px) 4px;
  border-bottom: 1px solid var(--line-soft);
  border-right: 1px solid var(--line-soft);
}
.stat:nth-child(3n) { border-right: 0; }
.stat__num {
  display: flex;
  align-items: baseline;
  gap: 6px;
  font-family: var(--display);
  font-weight: 700;
  font-size: clamp(2.5rem, 4.6vw, 4.1rem);
  letter-spacing: -0.045em;
  line-height: 1;
  font-variant-numeric: tabular-nums;
}
.stat__num em {
  font-style: normal;
  font-family: var(--mono);
  font-size: clamp(11px, 1vw, 13px);
  font-weight: 400;
  letter-spacing: 0.06em;
  color: var(--amber);
}
.stat__label {
  display: block;
  margin-top: 12px;
  font-family: var(--mono);
  font-size: 9.5px;
  letter-spacing: 0.12em;
  color: var(--muted-2);
  text-transform: uppercase;
}

.spec-table {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(0, 0.65fr);
  gap: clamp(24px, 4vw, 56px);
  margin-top: clamp(40px, 5vw, 64px);
}
.spec-table dl { display: flex; flex-direction: column; }
.spec-table dl > div {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  padding: 13px 0;
  border-bottom: 1px solid var(--line-soft);
}
.spec-table dt {
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.08em;
  color: var(--muted-2);
  flex: none;
}
.spec-table dd { font-size: 13.5px; color: var(--ink); text-align: right; }
.spec-table__note {
  align-self: start;
  display: flex;
  gap: 12px;
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.025);
  color: var(--muted);
  font-size: 12.5px;
  line-height: 1.7;
}
.spec-table__note .ico { color: var(--amber); margin-top: 2px; }

/* ---------- 13. 专利 ---------- */
.patent-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}
.patent {
  position: relative;
  display: flex;
  flex-direction: column;
  text-align: left;
  min-height: 212px;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background:
    linear-gradient(165deg, rgba(255, 255, 255, 0.045), rgba(255, 255, 255, 0.01));
  color: var(--ink);
  overflow: hidden;
  transition: transform 0.45s var(--ease), border-color 0.45s var(--ease), background 0.45s var(--ease);
}
.patent::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: radial-gradient(300px circle at var(--mx, 50%) var(--my, 0%), rgba(255, 194, 75, 0.1), transparent 70%);
  opacity: 0;
  transition: opacity 0.45s var(--ease);
}
.patent:hover,
.patent:focus-visible { border-color: rgba(255, 194, 75, 0.3); transform: translateY(-4px); }
.patent:hover::after { opacity: 1; }
.patent__top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  position: relative;
  z-index: 1;
}
.patent__top .mono { font-size: 9.5px; letter-spacing: 0.14em; color: var(--amber); }
.patent__status {
  font-family: var(--mono);
  font-size: 9px;
  letter-spacing: 0.08em;
  color: var(--teal);
  border: 1px solid rgba(79, 227, 193, 0.28);
  border-radius: 999px;
  padding: 3px 8px;
}
.patent__title {
  position: relative;
  z-index: 1;
  display: block;
  margin: 18px 0 10px;
  font-family: var(--display);
  font-size: 16.5px;
  font-weight: 700;
  letter-spacing: -0.015em;
  line-height: 1.45;
  max-width: 24ch;
}
.patent__meta {
  position: relative;
  z-index: 1;
  display: block;
  font-family: var(--mono);
  font-size: 9.5px;
  letter-spacing: 0.06em;
  color: var(--muted-2);
}
.patent__open {
  position: relative;
  z-index: 1;
  margin-top: auto;
  padding-top: 22px;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.1em;
  color: var(--muted);
  transition: color 0.3s;
}
.patent:hover .patent__open { color: var(--amber); }
.patent__open .ico { width: 13px; height: 13px; }
.patent__stamp {
  position: absolute;
  right: 16px;
  bottom: 14px;
  width: 54px;
  height: 54px;
  color: rgba(255, 194, 75, 0.14);
  transition: color 0.45s var(--ease), transform 0.45s var(--ease);
}
.patent:hover .patent__stamp { color: rgba(255, 194, 75, 0.3); transform: rotate(12deg); }

/* ---------- 14. 价格 ---------- */
.tiers {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  align-items: start;
}
.tier {
  position: relative;
  padding: clamp(24px, 2.6vw, 34px);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: linear-gradient(170deg, rgba(255, 255, 255, 0.04), rgba(255, 255, 255, 0.008));
}
.tier--featured {
  border-color: rgba(255, 194, 75, 0.36);
  background:
    radial-gradient(100% 60% at 50% 0%, rgba(255, 194, 75, 0.14), transparent 70%),
    linear-gradient(170deg, rgba(255, 255, 255, 0.05), rgba(255, 255, 255, 0.012));
  box-shadow: 0 30px 70px -40px rgba(255, 170, 40, 0.35);
  transform: translateY(-10px);
}
.tier__badge {
  position: absolute;
  top: -11px;
  left: 50%;
  transform: translateX(-50%);
  padding: 4px 12px;
  border-radius: 999px;
  background: var(--amber);
  color: #1a1204;
  font-size: 9px;
  letter-spacing: 0.12em;
  white-space: nowrap;
}
.tier__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}
.tier__head h3 {
  font-family: var(--display);
  font-size: clamp(1.4rem, 2vw, 1.7rem);
  font-weight: 700;
  letter-spacing: -0.025em;
}
.tier__tag { font-size: 9px; color: var(--muted-2); }
.tier__desc {
  margin-top: 12px;
  font-size: 12.5px;
  line-height: 1.75;
  color: var(--muted);
  min-height: 3.5em;
}
.tier__price {
  margin-top: 26px;
  font-family: var(--display);
  font-size: clamp(2.4rem, 3.4vw, 3.1rem);
  font-weight: 700;
  letter-spacing: -0.045em;
  line-height: 1;
  font-variant-numeric: tabular-nums;
}
.tier__note {
  margin-top: 10px;
  font-family: var(--mono);
  font-size: 9px;
  letter-spacing: 0.08em;
  color: var(--muted-2);
}
.tier__list {
  margin: 26px 0 30px;
  padding-top: 24px;
  border-top: 1px solid var(--line-soft);
  display: flex;
  flex-direction: column;
  gap: 11px;
}
.tier__list li {
  position: relative;
  padding-left: 18px;
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--muted);
}
.tier__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.62em;
  width: 6px;
  height: 1px;
  background: var(--amber);
}
.pricing__foot {
  margin-top: 40px;
  text-align: center;
  font-size: 9px;
  letter-spacing: 0.16em;
  color: var(--muted-2);
}

/* ---------- 15. FAQ ---------- */
.faq__inner {
  display: grid;
  grid-template-columns: minmax(0, 0.55fr) minmax(0, 1.1fr);
  gap: clamp(28px, 5vw, 80px);
  align-items: start;
}
.faq__inner .sec-head { margin-bottom: 0; position: sticky; top: calc(var(--nav-h) + 32px); }
.faq__note {
  margin-top: 26px;
  max-width: 32ch;
  font-size: 13px;
  line-height: 1.8;
  color: var(--muted);
}
.faq__note a {
  color: var(--amber);
  border-bottom: 1px solid rgba(255, 194, 75, 0.35);
}
.qa {
  border-bottom: 1px solid var(--line);
}
.qa:first-child { border-top: 1px solid var(--line); }
.qa summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 22px 4px;
  font-family: var(--display);
  font-size: clamp(1rem, 1.5vw, 1.18rem);
  font-weight: 700;
  letter-spacing: -0.01em;
  cursor: pointer;
  list-style: none;
  transition: color 0.3s;
}
.qa summary::-webkit-details-marker { display: none; }
.qa summary:hover { color: var(--amber); }
.qa__icon {
  position: relative;
  flex: none;
  width: 22px;
  height: 22px;
  border: 1px solid var(--line);
  border-radius: 50%;
  transition: transform 0.4s var(--ease), border-color 0.3s, background 0.3s;
}
.qa__icon::before,
.qa__icon::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  background: var(--muted);
  transform: translate(-50%, -50%);
  transition: background 0.3s;
}
.qa__icon::before { width: 9px; height: 1px; }
.qa__icon::after { width: 1px; height: 9px; }
.qa[open] .qa__icon { transform: rotate(90deg); border-color: rgba(255, 194, 75, 0.5); background: rgba(255, 194, 75, 0.08); }
.qa[open] .qa__icon::before,
.qa[open] .qa__icon::after { background: var(--amber); }
.qa[open] .qa__icon::after { opacity: 0; }
.qa__body { padding: 0 4px 26px; }
.qa__body p {
  max-width: 62ch;
  font-size: 13.5px;
  line-height: 1.85;
  color: var(--muted);
}

/* ---------- 16. 预约 ---------- */
.reserve__panel {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 0.9fr);
  gap: clamp(28px, 5vw, 72px);
  padding: clamp(28px, 5vw, 64px);
  border: 1px solid rgba(255, 194, 75, 0.18);
  border-radius: 30px;
  background:
    radial-gradient(90% 100% at 15% 0%, rgba(255, 194, 75, 0.12), transparent 60%),
    radial-gradient(60% 80% at 100% 100%, rgba(79, 227, 193, 0.05), transparent 60%),
    linear-gradient(170deg, #0d0e11, #08090b);
  overflow: hidden;
}
.reserve__panel::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: linear-gradient(rgba(243, 239, 230, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(243, 239, 230, 0.04) 1px, transparent 1px);
  background-size: 44px 44px;
  mask-image: radial-gradient(70% 70% at 20% 10%, #000, transparent 75%);
  -webkit-mask-image: radial-gradient(70% 70% at 20% 10%, #000, transparent 75%);
  pointer-events: none;
}
.reserve__copy { position: relative; }
.reserve__copy .h2 { margin: 18px 0 20px; }
.reserve__copy .lede { max-width: 40ch; }
.reserve__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 22px;
  margin-top: 30px;
  padding-top: 22px;
  border-top: 1px solid var(--line-soft);
}
.reserve__meta li {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  color: var(--muted);
}
.reserve__meta .ico { width: 15px; height: 15px; color: var(--amber); }
.reserve__form {
  position: relative;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
  align-content: start;
}
.field { display: flex; flex-direction: column; gap: 7px; }
.field:nth-child(3) { grid-column: 1 / -1; }
.field--half { grid-column: auto; }
.field label {
  font-family: var(--mono);
  font-size: 9.5px;
  letter-spacing: 0.12em;
  color: var(--muted-2);
  text-transform: uppercase;
}
.field input,
.field select {
  width: 100%;
  height: 46px;
  padding: 0 14px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.03);
  color: var(--ink);
  font-size: 14px;
  transition: border-color 0.25s, background 0.25s;
  appearance: none;
}
.field select {
  background-image: linear-gradient(45deg, transparent 50%, var(--muted) 50%),
    linear-gradient(135deg, var(--muted) 50%, transparent 50%);
  background-position: calc(100% - 18px) 20px, calc(100% - 13px) 20px;
  background-size: 5px 5px, 5px 5px;
  background-repeat: no-repeat;
  padding-right: 36px;
}
.field input::placeholder { color: var(--muted-2); opacity: 0.65; }
.field input:focus,
.field select:focus {
  border-color: rgba(255, 194, 75, 0.55);
  background: rgba(255, 255, 255, 0.05);
  outline: none;
}
.field input:user-invalid { border-color: #ff7a6b; }
.reserve__form .btn { grid-column: 1 / -1; margin-top: 4px; }
.form__note {
  grid-column: 1 / -1;
  font-family: var(--mono);
  font-size: 9px;
  letter-spacing: 0.05em;
  color: var(--muted-2);
  text-align: center;
}
.form__ok {
  grid-column: 1 / -1;
  padding: 14px;
  border: 1px solid rgba(79, 227, 193, 0.3);
  border-radius: 10px;
  background: rgba(79, 227, 193, 0.07);
  color: var(--teal);
  font-size: 13px;
  line-height: 1.6;
}

/* ---------- 17. 页脚 ---------- */
.footer {
  position: relative;
  z-index: 2;
  border-top: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.018), transparent 40%);
  padding-top: clamp(48px, 6vw, 76px);
}
.footer__inner {
  display: grid;
  grid-template-columns: minmax(0, 1.6fr) repeat(3, minmax(0, 0.6fr));
  gap: clamp(28px, 4vw, 56px);
  padding-bottom: clamp(40px, 5vw, 64px);
}
.footer__brand p {
  margin-top: 20px;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.8;
}
.footer__mail {
  display: inline-block;
  margin-top: 16px;
  font-family: var(--mono);
  font-size: 11px;
  color: var(--amber);
  border-bottom: 1px solid rgba(255, 194, 75, 0.3);
  padding-bottom: 2px;
}
.footer__col { display: flex; flex-direction: column; gap: 10px; }
.footer__col h3 {
  font-family: var(--mono);
  font-size: 9.5px;
  font-weight: 400;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted-2);
  margin-bottom: 4px;
}
.footer__col a {
  font-size: 13px;
  color: var(--muted);
  width: fit-content;
  transition: color 0.25s;
}
.footer__col a:hover { color: var(--amber); }
.footer__legal {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  padding-block: 22px;
  border-top: 1px solid var(--line-soft);
  font-family: var(--mono);
  font-size: 9px;
  letter-spacing: 0.04em;
  line-height: 1.7;
  color: var(--muted-2);
}
.footer__legal p { max-width: 60ch; }
.footer__credits { text-align: right; }

/* ---------- 18. 证书弹窗 ---------- */
.cert {
  width: min(900px, 92vw);
  max-height: 90svh;
  padding: 0;
  border: 1px solid rgba(255, 194, 75, 0.22);
  border-radius: 10px;
  background: #0c0e11;
  color: var(--ink);
  overflow: hidden;
}
.cert[open] { display: flex; flex-direction: column; animation: cert-in 0.45s var(--ease); }
.cert::backdrop {
  background: rgba(3, 4, 5, 0.78);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}
@keyframes cert-in {
  from { opacity: 0; transform: translateY(14px) scale(0.985); }
  to { opacity: 1; transform: none; }
}
.cert__bar {
  flex: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 10px 12px 10px 20px;
  border-bottom: 1px solid var(--line-soft);
  background: #0c0e11;
}
.cert__bar .mono { font-size: 9.5px; color: var(--amber); }
.cert__close {
  width: 36px;
  height: 36px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--line);
  border-radius: 50%;
  background: transparent;
  color: var(--ink);
  transition: background 0.25s, border-color 0.25s;
}
.cert__close:hover { background: rgba(255, 255, 255, 0.08); border-color: rgba(243, 239, 230, 0.3); }
.cert__paper {
  position: relative;
  flex: 1;
  overflow-y: auto;
  padding: clamp(28px, 4.5vw, 56px);
  background:
    repeating-linear-gradient(90deg, rgba(120, 92, 50, 0.035) 0 1px, transparent 1px 7px),
    radial-gradient(120% 90% at 50% 0%, #fbf6ea, #f1e8d5 60%, #e9dcc2);
  color: #1b1710;
}
.cert__paper::before {
  content: "";
  position: absolute;
  inset: 14px;
  border: 1px solid rgba(27, 23, 16, 0.22);
  pointer-events: none;
}
.cert__paper::after {
  content: "";
  position: absolute;
  inset: 19px;
  border: 1px dashed rgba(27, 23, 16, 0.12);
  pointer-events: none;
}
.cert__paper > * { position: relative; z-index: 1; }
.cert__head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 20px;
  padding-bottom: 18px;
  border-bottom: 1px solid rgba(27, 23, 16, 0.16);
}
.cert__org { display: flex; flex-direction: column; gap: 5px; }
.cert__org-en {
  font-size: 8px;
  letter-spacing: 0.16em;
  color: #8a6a34;
  font-family: var(--mono);
}
.cert__org-cn {
  font-family: var(--display);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.02em;
}
.cert__serial { font-family: var(--mono); font-size: 9px; color: #7d6b4c; letter-spacing: 0.06em; white-space: nowrap; }
.cert__kicker {
  margin-top: 26px;
  font-size: 8.5px;
  letter-spacing: 0.12em;
  color: #8a6a34;
}
.cert__title {
  margin: 12px 0 26px;
  font-family: var(--display);
  font-size: clamp(1.4rem, 3vw, 2rem);
  font-weight: 700;
  line-height: 1.35;
  letter-spacing: -0.015em;
  max-width: 26ch;
}
.cert__people {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px 24px;
  padding: 20px 0;
  border-block: 1px solid rgba(27, 23, 16, 0.14);
}
.cert__people span {
  display: block;
  font-family: var(--mono);
  font-size: 8px;
  letter-spacing: 0.12em;
  color: #8a7a5f;
  margin-bottom: 4px;
  text-transform: uppercase;
}
.cert__people p { font-size: 13px; font-weight: 500; }
.cert__abstract { margin-top: 24px; }
.cert__label {
  display: block;
  font-family: var(--mono);
  font-size: 8px;
  letter-spacing: 0.14em;
  color: #8a6a34;
  margin-bottom: 8px;
}
.cert__abstract p { font-size: 12.5px; line-height: 1.9; color: #3a3123; }
.cert__claims { margin-top: 24px; }
.cert__claims ol { padding-left: 18px; list-style: decimal; }
.cert__claims li {
  font-size: 12px;
  line-height: 1.8;
  color: #3a3123;
  margin-bottom: 8px;
  padding-left: 4px;
}
.cert__claims li::marker { color: #a8792c; font-family: var(--mono); font-size: 10px; }
.cert__foot {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 24px;
  margin-top: 34px;
}
.cert__sign { flex: 1; max-width: 240px; }
.cert__sign-line {
  display: block;
  height: 1px;
  background: rgba(27, 23, 16, 0.3);
  margin-bottom: 8px;
}
.cert__sign p { font-size: 11px; color: #5a4c34; }
.cert__sign .mono { font-size: 8px; color: #8a7a5f; letter-spacing: 0.12em; }
.cert__seal {
  width: clamp(78px, 10vw, 108px);
  color: #a8712b;
  transform: rotate(-7deg);
  opacity: 0.9;
  flex: none;
}
.cert__barcode {
  height: 34px;
  margin-top: 30px;
  background: repeating-linear-gradient(90deg, #1b1710 0 2px, transparent 2px 4px, #1b1710 4px 5px, transparent 5px 9px, #1b1710 9px 12px, transparent 12px 14px);
  opacity: 0.65;
}
.cert__fine {
  margin-top: 10px;
  font-family: var(--mono);
  font-size: 8px;
  letter-spacing: 0.08em;
  color: #8a7a5f;
}
.cert__actions {
  display: flex;
  justify-content: flex-end;
  margin-top: 22px;
}
.cert__btn {
  padding: 10px 22px;
  border: 1px solid rgba(27, 23, 16, 0.35);
  border-radius: 999px;
  background: transparent;
  color: #1b1710;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.04em;
  transition: background 0.25s, color 0.25s;
}
.cert__btn:hover { background: #1b1710; color: #f3ecdc; }

/* ---------- 19. 动效与降级 ---------- */
.reveal {
  opacity: 0;
  translate: 0 24px;
  transition: opacity 0.9s var(--ease), translate 0.9s var(--ease);
}
.reveal.is-in { opacity: 1; translate: 0 0; }

html.js .hero__visual.reveal { transition-delay: 0.12s; }

/* ---------- 20. 断点 ---------- */
@media (min-width: 1700px) {
  :root { --container: 1440px; }
  .hero__title { font-size: clamp(2.9rem, 5.8vw, 6.6rem); }
}

@media (max-width: 1180px) {
  .hero__inner { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 32px; }
  .hero__title { font-size: clamp(2.7rem, 6vw, 4.6rem); }
  .chip--noise { left: -10px; }
  .chip--speed { right: 0; }
  .features .grid--3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .patent-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .principles { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .principle:nth-child(2n) { border-right: 0; }
  .principle:nth-child(-n + 2) { border-bottom: 1px solid var(--line-soft); }
  .day__list { grid-template-columns: repeat(2, minmax(0, 1fr)); row-gap: 26px; }
}

@media (max-width: 960px) {
  .nav__links {
    position: fixed;
    top: var(--nav-h);
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 10px var(--pad) 22px;
    background: rgba(7, 8, 10, 0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--line);
    transform: translateY(-12px);
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: opacity 0.3s var(--ease), transform 0.3s var(--ease), visibility 0.3s;
    max-height: calc(100svh - var(--nav-h));
    overflow-y: auto;
  }
  .nav__links.is-open { opacity: 1; transform: none; pointer-events: auto; visibility: visible; }
  .nav__links a { font-size: 16px; padding: 15px 0; border-bottom: 1px solid var(--line-soft); }
  .nav__links a::after { display: none; }
  .nav__toggle { display: block; }
  .nav__actions .btn--sm { display: none; }

  .hero { min-height: auto; padding-top: calc(var(--nav-h) + 64px); padding-bottom: 48px; }
  .hero__inner { grid-template-columns: minmax(0, 1fr); gap: 48px; }
  .hero__lede { max-width: 46ch; }
  .hero__foot { display: none; }
  .hero__visual { max-width: 680px; }
  .chip--speed { right: 4%; }

  .anatomy { height: auto; }
  .anatomy__sticky {
    position: static;
    height: auto;
    display: block;
    padding: 90px 0 72px;
    overflow: visible;
  }
  .anatomy__body { grid-template-columns: minmax(0, 1fr); gap: 32px; }
  .ex { height: clamp(280px, 40vw, 380px); }
  .ex__hint { display: none; }
  .ex__list { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 4px; }
  .ex__item { opacity: 0.75; }
  .ex__layer[data-ex-layer="4"] { transform: translateY(-16%); }
  .ex__layer[data-ex-layer="3"] { transform: translateY(-5%); }
  .ex__layer[data-ex-layer="2"] { transform: translateY(1%); }
  .ex__layer[data-ex-layer="1"] { transform: translateY(7%); }
  .ex__layer[data-ex-layer="0"] { transform: translateY(14%); }

  .sec-head--row { grid-template-columns: minmax(0, 1fr); align-items: start; }
  .sec-head--row .lede { max-width: 58ch; padding-bottom: 0; }

  .stats { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .stat:nth-child(3n) { border-right: 1px solid var(--line-soft); }
  .stat:nth-child(2n) { border-right: 0; }

  .spec-table { grid-template-columns: minmax(0, 1fr); }
  .spec-table__note { max-width: 460px; }

  .tiers { grid-template-columns: minmax(0, 1fr); max-width: 560px; }
  .tier--featured { transform: none; }
  .tier__desc { min-height: 0; }

  .faq__inner { grid-template-columns: minmax(0, 1fr); }
  .faq__inner .sec-head { position: static; }

  .reserve__panel { grid-template-columns: minmax(0, 1fr); }
  .reserve__copy .lede { max-width: 52ch; }
  .reserve__form { max-width: 560px; }

  .footer__inner { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .footer__brand { grid-column: 1 / -1; }
  .footer__legal { flex-direction: column; }
  .footer__credits { text-align: left; }
}

@media (max-width: 640px) {
  :root { --nav-h: 68px; --pad: 20px; }
  .brand__mark { width: 36px; height: 36px; }
  .brand__text span { display: none; }
  .brand__text strong { font-size: 14px; }
  .nav__actions { gap: 8px; }
  .lang { padding: 6px 10px; }

  .hero { padding-top: calc(var(--nav-h) + 40px); }
  .hero__title { font-size: clamp(2.55rem, 11.4vw, 3.4rem); margin: 16px 0 20px; }
  .hero__lede br { display: none; }
  .hero__cta .btn { flex: 1 1 auto; }
  .hero__cta .btn__meta { display: none; }
  .hero__meta { gap: 10px 16px; }
  .hero__meta li { font-size: 11px; }
  .plate { padding: 10px 10px 0; border-radius: 18px; }
  .plate__bar { font-size: 8px; }
  .plate__foot { font-size: 8px; gap: 12px; }
  .chip { padding: 8px 10px; border-radius: 12px; }
  .chip__k { font-size: 17px; }
  .chip__u { font-size: 8px; }
  .chip__u em { display: none; }
  .chip--speed { top: -14px; right: 2%; }
  .chip--noise { display: none; }
  .chip--lift { bottom: -14px; right: 4%; }

  .section { padding-block: 72px; }
  .h2 { font-size: clamp(1.8rem, 8vw, 2.3rem); }
  .h2--xl { font-size: clamp(2.2rem, 10vw, 3rem); }
  .h2--md { font-size: clamp(1.6rem, 7vw, 2rem); }
  .sec-head { margin-bottom: 34px; }
  .eyebrow { font-size: 10px; letter-spacing: 0.16em; }
  .lede { font-size: 14.5px; }

  .why__line { font-size: clamp(1.5rem, 7vw, 2rem); text-align: left; }
  .duo { grid-template-columns: minmax(0, 1fr); }
  .duo__ghost { font-size: 8rem; top: -20px; }
  .duo__card { padding: 26px 22px; }

  .anatomy__sticky { padding: 84px 0 56px; }
  .ex { height: 240px; }
  .ex__list { grid-template-columns: minmax(0, 1fr); }
  .ex__item { padding: 11px 12px; opacity: 0.65; }
  .ex__item.is-active { opacity: 1; }

  .features .grid--3 { grid-template-columns: minmax(0, 1fr); }
  .card p { max-width: none; }

  .quote { grid-template-columns: minmax(0, 1fr); gap: 26px; }
  .quote blockquote p { font-size: clamp(1.3rem, 6vw, 1.7rem); }
  .principles { grid-template-columns: minmax(0, 1fr); }
  .principle { border-right: 0; border-bottom: 1px solid var(--line-soft); padding-bottom: 70px; }
  .principle:last-child { border-bottom: 0; }
  .principle__fig { font-size: 3.4rem; }
  .day__list { grid-template-columns: minmax(0, 1fr); }
  .day__item p { max-width: none; }

  .stats { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .stat { padding: 24px 0; }
  .stat__num { font-size: clamp(2.1rem, 10vw, 2.8rem); }
  .stat__num em { font-size: 10px; }
  .stat__label { font-size: 8.5px; }
  .spec-table dl > div { gap: 14px; }
  .spec-table dd { font-size: 12.5px; }

  .patent-grid { grid-template-columns: minmax(0, 1fr); }
  .patent { min-height: 0; padding: 22px; }
  .patent__title { font-size: 16px; max-width: none; }
  .patent__stamp { width: 46px; height: 46px; }

  .tiers { max-width: none; }
  .tier { padding: 26px 22px; }

  .qa summary { font-size: 15.5px; padding: 19px 2px; }

  .reserve__panel { padding: 26px 20px; border-radius: 22px; }
  .reserve__form { grid-template-columns: minmax(0, 1fr); }
  .field:nth-child(3) { grid-column: auto; }
  .reserve__meta { gap: 10px 16px; }
  .reserve__meta li { font-size: 11px; }

  .footer__inner { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 28px 20px; }
  .footer__brand { grid-column: 1 / -1; }
  .footer__legal { font-size: 8.5px; }

  .cert { width: 94vw; max-height: 92svh; }
  .cert__paper { padding: 26px 22px; }
  .cert__head { flex-direction: column; gap: 8px; }
  .cert__org-en { display: none; }
  .cert__people { grid-template-columns: minmax(0, 1fr); gap: 12px; }
  .cert__title { font-size: 1.25rem; }
  .cert__seal { width: 76px; }
  .cert__foot { gap: 12px; margin-top: 26px; }
  .cert__barcode { margin-top: 20px; height: 26px; }
  .cert__paper::before { inset: 8px; }
  .cert__paper::after { inset: 12px; }
}

/* 移动端 / 触屏：静态版（brief 要求整站动效降级） */
@media (max-width: 767px), (hover: none) and (pointer: coarse) {
  html { scroll-behavior: auto; }
  .aurora,
  .pulse,
  .plate__live i,
  .chip { animation: none; }
  .ticker__track {
    animation: none;
    flex-wrap: wrap;
    width: 100%;
    justify-content: center;
    gap: 10px 18px;
    padding-inline: 16px;
  }
  .ticker__track > *:nth-child(n + 16) { display: none; }
  .ticker { mask-image: none; -webkit-mask-image: none; }
  .reveal { opacity: 1; translate: 0 0; }
}

@media (max-width: 400px) {
  .hero__title { font-size: 2.4rem; }
  .stat__num { font-size: 2rem; }
  .chip--noise { bottom: 8%; }
}

/* ---------- 降级 ---------- */
@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;
  }
  .aurora { animation: none; }
  .dust,
  .spotlight { display: none; }
  .chip { animation: none; }
  .ticker__track { animation: none; flex-wrap: wrap; width: 100%; justify-content: center; row-gap: 10px; }
  .ticker__track > *:nth-child(n + 16) { display: none; }
  .ticker { mask-image: none; -webkit-mask-image: none; }
  .reveal { opacity: 1; translate: 0 0; }
  .chip,
  .card,
  .patent,
  .tier--featured { transform: none !important; }
}