/* ============================================================
   WUXVE — 悟雪官网
   零依赖静态站。样式按「基础 → 组件 → 页面区块 → 响应式」组织。
   ============================================================ */

/* ---------- 0. Tokens ---------- */
:root {
  --bg: #05060a;
  --bg-soft: #070910;
  --ink: #f1f5fa;
  --ink-soft: #d4dce7;
  --muted: #98a3b4;
  --muted-dim: #7d8798;
  --line: rgba(255, 255, 255, 0.085);
  --line-strong: rgba(255, 255, 255, 0.16);
  --ice: #8be9ff;
  --ice-deep: #3cc7e8;
  --violet: #a78bfa;
  --amber: #ffc178;
  --paper: #f3ecdf;
  --cinnabar: #b8482f;

  --font-sans: "Inter", "SF Pro Display", -apple-system, BlinkMacSystemFont, "Segoe UI",
    "PingFang SC", "HarmonyOS Sans SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  --font-mono: "SF Mono", "JetBrains Mono", "Cascadia Code", "Roboto Mono", Consolas,
    "Liberation Mono", monospace;
  --font-serif: "Songti SC", "STSong", "Noto Serif SC", "Source Han Serif SC", "SimSun", serif;

  --pad: clamp(20px, 4.6vw, 64px);
  --max: 1320px;
  --radius: 20px;

  --ease: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-soft: cubic-bezier(0.4, 0, 0.2, 1);
}

/* ---------- 1. Base ---------- */
*,
*::before,
*::after { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  scroll-padding-top: 96px;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.75;
  letter-spacing: 0.005em;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

body::before {
  /* 一层很淡的顶部极光，WebGL 不可用时也有底色氛围 */
  content: "";
  position: fixed;
  inset: 0;
  z-index: -2;
  background:
    radial-gradient(60% 42% at 78% -4%, rgba(80, 110, 200, 0.16), transparent 70%),
    radial-gradient(40% 30% at 10% 8%, rgba(120, 90, 220, 0.1), transparent 70%),
    var(--bg);
}

h1, h2, h3, h4, p, blockquote, figure, dl, dd { margin: 0; }
ul, ol { margin: 0; padding: 0; list-style: none; }
img, svg, canvas { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; background: none; border: 0; padding: 0; }
::selection { background: var(--ice); color: #031018; }

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

[hidden] { display: none !important; }

.skip {
  position: fixed;
  top: -100px;
  left: 16px;
  z-index: 400;
  padding: 12px 18px;
  background: var(--ink);
  color: #05060a;
  border-radius: 8px;
  font-size: 13px;
  transition: top 0.2s var(--ease-soft);
}
.skip:focus { top: 16px; }

.wrap {
  width: min(var(--max), 100% - var(--pad) * 2);
  margin-inline: auto;
  position: relative;
}

.section {
  position: relative;
  padding-block: clamp(88px, 11vw, 168px);
  border-top: 1px solid rgba(255, 255, 255, 0.055);
}

.grad {
  background: linear-gradient(98deg, #eaf7ff 0%, #8be9ff 36%, #a78bfa 74%, #e9d5ff 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

/* ---------- 2. 全局质感层 ---------- */
.grain {
  position: fixed;
  inset: 0;
  z-index: 90;
  pointer-events: none;
  opacity: 0.038;
  mix-blend-mode: overlay;
  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='.82' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='160' height='160' filter='url(%23n)'/%3E%3C/svg%3E");
}

.progress {
  position: fixed;
  inset: 0 0 auto;
  height: 1.5px;
  z-index: 120;
  background: rgba(255, 255, 255, 0.05);
  pointer-events: none;
}
.progress i {
  display: block;
  height: 100%;
  width: 100%;
  transform: scaleX(0);
  transform-origin: 0 50%;
  background: linear-gradient(90deg, var(--ice), var(--violet));
  will-change: transform;
}

/* 自定义光标 */
.cursor {
  position: fixed;
  inset: 0;
  z-index: 200;
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.3s;
}
html.has-cursor .cursor { opacity: 0; }
html.cursor-ready .cursor { opacity: 1; }
html.has-cursor,
html.has-cursor * { cursor: none; }

.cursor-dot,
.cursor-ring {
  position: absolute;
  top: 0;
  left: 0;
  border-radius: 50%;
  will-change: transform;
}
.cursor-dot {
  width: 5px;
  height: 5px;
  margin: -2.5px 0 0 -2.5px;
  background: var(--ice);
  box-shadow: 0 0 12px rgba(139, 233, 255, 0.9);
}
.cursor-ring {
  width: 34px;
  height: 34px;
  margin: -17px 0 0 -17px;
  border: 1px solid rgba(255, 255, 255, 0.42);
  display: grid;
  place-items: center;
  transition: width 0.3s var(--ease), height 0.3s var(--ease),
    margin 0.3s var(--ease), background-color 0.3s, border-color 0.3s;
}
.cursor-label {
  font-family: var(--font-mono);
  font-size: 8px;
  letter-spacing: 0.08em;
  font-style: normal;
  color: #031018;
  opacity: 0;
  transform: scale(0.7);
  transition: opacity 0.2s, transform 0.2s;
  white-space: nowrap;
}
html.cursor-hover .cursor-ring {
  width: 62px;
  height: 62px;
  margin: -31px 0 0 -31px;
  background: rgba(139, 233, 255, 0.92);
  border-color: transparent;
}
html.cursor-hover .cursor-label { opacity: 1; transform: scale(1); }
html.cursor-hover .cursor-dot { opacity: 0; }
html.cursor-link .cursor-ring {
  width: 46px;
  height: 46px;
  margin: -23px 0 0 -23px;
  border-color: rgba(139, 233, 255, 0.7);
  background: rgba(139, 233, 255, 0.06);
}
html.cursor-link .cursor-dot { opacity: 0; }

/* ---------- 3. 开场遮罩 ---------- */
.intro {
  position: fixed;
  inset: 0;
  z-index: 300;
  background: var(--bg);
  display: none;
  place-items: center;
  transition: opacity 0.8s var(--ease-soft), visibility 0.8s;
}
/* 只有在脚本正常运行时才展示遮罩：禁用 JS 时页面直接可读 */
.js .intro { display: grid; }
html.intro-skip .intro { display: none; }
html.intro-done .intro {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}
.intro-inner {
  display: grid;
  justify-items: center;
  gap: 22px;
}
.intro-mark { width: 38px; color: var(--ice); animation: spin 14s linear infinite; }
.intro-word {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.62em;
  text-indent: 0.62em;
  color: rgba(255, 255, 255, 0.72);
}
.intro-bar {
  width: 190px;
  height: 1px;
  background: rgba(255, 255, 255, 0.14);
  overflow: hidden;
}
.intro-bar i {
  display: block;
  height: 100%;
  background: linear-gradient(90deg, var(--ice), var(--violet));
  width: 100%;
  transform-origin: 0 50%;
  transform: scaleX(0);
  animation: introbar 1.15s var(--ease) 0.1s forwards;
}
.intro-meta {
  display: flex;
  justify-content: space-between;
  width: min(320px, 82vw);
  font-family: var(--font-mono);
  font-size: 8px;
  letter-spacing: 0.14em;
  color: rgba(255, 255, 255, 0.32);
}

/* ---------- 4. 页头 ---------- */
.site-header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 100;
  display: flex;
  align-items: center;
  gap: clamp(20px, 4vw, 56px);
  padding: 18px var(--pad);
  transition: transform 0.55s var(--ease), background-color 0.4s, border-color 0.4s,
    backdrop-filter 0.4s;
  border-bottom: 1px solid transparent;
}
.site-header.is-stuck {
  background: rgba(5, 6, 10, 0.7);
  -webkit-backdrop-filter: blur(18px) saturate(140%);
  backdrop-filter: blur(18px) saturate(140%);
  border-bottom-color: rgba(255, 255, 255, 0.07);
}
.site-header.is-hidden { transform: translateY(-105%); }
html.menu-open .site-header { transform: none; background: transparent; border-color: transparent; z-index: 140; }

.brand {
  display: inline-flex;
  align-items: center;
  gap: 11px;
  flex: none;
}
.brand-mark {
  width: 27px;
  height: 27px;
  color: var(--ink);
  transition: color 0.3s, transform 0.6s var(--ease);
}
.brand:hover .brand-mark { color: var(--ice); transform: rotate(60deg); }
.brand-text { display: flex; align-items: baseline; gap: 8px; }
.brand-text b {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.24em;
}
.brand-text i {
  font-style: normal;
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--muted);
}

.nav {
  display: flex;
  gap: clamp(18px, 2.6vw, 38px);
  margin-left: auto;
}
.nav a {
  position: relative;
  display: inline-flex;
  align-items: flex-start;
  gap: 5px;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.66);
  padding: 6px 0;
  transition: color 0.25s;
}
.nav a em {
  font-family: var(--font-mono);
  font-style: normal;
  font-size: 8px;
  letter-spacing: 0.05em;
  color: rgba(255, 255, 255, 0.26);
  transform: translateY(-2px);
  transition: color 0.25s;
}
.nav a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 1px;
  background: var(--ice);
  transform: scaleX(0);
  transform-origin: 0 50%;
  transition: transform 0.4s var(--ease);
}
.nav a:hover,
.nav a.is-active { color: var(--ink); }
.nav a:hover::after,
.nav a.is-active::after { transform: scaleX(1); }
.nav a:hover em,
.nav a.is-active em { color: var(--ice); }

.header-cta {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  height: 38px;
  padding: 0 17px;
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: 999px;
  font-size: 12px;
  letter-spacing: 0.04em;
  color: rgba(255, 255, 255, 0.85);
  white-space: nowrap;
  transition: background-color 0.3s, color 0.3s, border-color 0.3s;
}
.header-cta svg { width: 14px; height: 14px; transition: transform 0.35s var(--ease); }
.header-cta:hover {
  background: var(--ink);
  border-color: var(--ink);
  color: #05060a;
}
.header-cta:hover svg { transform: translateX(3px); }

.menu-btn {
  display: none;
  width: 42px;
  height: 42px;
  margin-left: auto;
  position: relative;
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: 50%;
  z-index: 130;
}
.menu-btn span {
  position: absolute;
  left: 12px;
  width: 16px;
  height: 1px;
  background: var(--ink);
  transition: transform 0.4s var(--ease), top 0.4s var(--ease);
}
.menu-btn span:first-child { top: 18px; }
.menu-btn span:last-child { top: 23px; }
html.menu-open .menu-btn span:first-child { top: 20px; transform: rotate(45deg); }
html.menu-open .menu-btn span:last-child { top: 20px; transform: rotate(-45deg); }

/* 移动端菜单 */
.mobile-menu {
  position: fixed;
  inset: 0;
  z-index: 110;
  background: rgba(5, 6, 10, 0.97);
  -webkit-backdrop-filter: blur(22px);
  backdrop-filter: blur(22px);
  padding: 108px var(--pad) 40px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  opacity: 0;
  transition: opacity 0.4s var(--ease-soft);
  overflow-y: auto;
}
.mobile-menu.is-open { opacity: 1; }
.mobile-menu nav { display: grid; gap: 2px; }
.mobile-menu nav a {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  padding: 16px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.6s var(--ease), transform 0.6s var(--ease);
}
.mobile-menu.is-open nav a { opacity: 1; transform: none; }
.mobile-menu nav a span { font-size: clamp(26px, 8vw, 38px); letter-spacing: -0.01em; }
.mobile-menu nav a em {
  font-family: var(--font-mono);
  font-style: normal;
  font-size: 9px;
  letter-spacing: 0.16em;
  color: var(--muted-dim);
}
.mobile-menu-foot {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  padding-top: 28px;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.06em;
  color: var(--muted);
}

/* ---------- 5. Hero ---------- */
.hero {
  position: relative;
  min-height: 100vh;
  min-height: 100svh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: clamp(120px, 17vh, 180px) 0 96px;
  overflow: hidden;
  isolation: isolate;
}
.hero-gl {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
}
.hero-veil {
  position: absolute;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  background:
    linear-gradient(90deg, rgba(5, 6, 10, 0.95) 0%, rgba(5, 6, 10, 0.8) 28%, rgba(5, 6, 10, 0.12) 60%, rgba(5, 6, 10, 0.32) 100%),
    radial-gradient(130% 80% at 50% 118%, rgba(5, 6, 10, 0.9), transparent 60%),
    repeating-linear-gradient(90deg, rgba(255, 255, 255, 0.032) 0 1px, transparent 1px 8.3333%);
  -webkit-mask-image: linear-gradient(180deg, #000 0%, #000 62%, transparent 96%);
  mask-image: linear-gradient(180deg, #000 0%, #000 62%, transparent 96%);
}
.hero-wrap { z-index: 3; width: min(var(--max), 100% - var(--pad) * 2); margin-inline: auto; }

.hero-eyebrow {
  display: flex;
  align-items: center;
  gap: 11px;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.18em;
  color: rgba(255, 255, 255, 0.5);
  opacity: 0;
  transform: translateY(12px);
  animation: rise 1s var(--ease) 0.55s forwards;
}
.hero-eyebrow .slash { opacity: 0.32; }
.pulse {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--ice);
  box-shadow: 0 0 0 0 rgba(139, 233, 255, 0.55);
  animation: ping 2.6s var(--ease-soft) infinite;
  flex: none;
}

.hero-title {
  margin-top: clamp(22px, 3.4vh, 38px);
  font-size: clamp(3rem, 8.5vw, 8.2rem);
  line-height: 0.99;
  font-weight: 600;
  letter-spacing: -0.035em;
  max-width: 15ch;
}
.hero-title .line {
  display: block;
  overflow: hidden;
  padding-bottom: 0.045em;
}
.hero-title .line-inner {
  display: block;
  will-change: transform;
}
.js .hero-title .line-inner {
  transform: translateY(118%);
  transition: transform 1.25s var(--ease);
}
.hero-title .line:nth-child(1) .line-inner { transition-delay: 0.05s; }
.hero-title .line:nth-child(2) .line-inner { transition-delay: 0.14s; }
.hero-title .line:nth-child(3) .line-inner { transition-delay: 0.23s; }
html.is-ready .hero-title .line-inner,
html.intro-done .hero-title .line-inner { transform: translateY(0); }

.line-last {
  display: flex !important;
  align-items: baseline;
  gap: clamp(18px, 3vw, 44px);
}
.line-last .end { color: var(--ice); }
.line-note {
  font-family: var(--font-mono);
  font-style: normal;
  font-size: 9px;
  line-height: 1.7;
  letter-spacing: 0.16em;
  color: rgba(255, 255, 255, 0.34);
  transform: translateY(-0.4em);
  white-space: nowrap;
}

.hero-bottom {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) auto;
  align-items: end;
  gap: clamp(28px, 4vw, 64px);
  margin-top: clamp(40px, 6vh, 72px);
  padding-top: 28px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  opacity: 0;
  transform: translateY(18px);
  animation: rise 1.1s var(--ease) 0.85s forwards;
}
.hero-lede {
  max-width: 47ch;
  font-size: clamp(14px, 1.05vw, 15.5px);
  line-height: 2;
  color: #aeb8c6;
}
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 11px;
  height: 50px;
  padding: 0 24px;
  border-radius: 999px;
  font-size: 13.5px;
  letter-spacing: 0.02em;
  white-space: nowrap;
  transition: transform 0.4s var(--ease), background-color 0.3s, border-color 0.3s,
    box-shadow 0.3s, color 0.3s;
}
.btn svg { width: 16px; height: 16px; }
.btn-primary {
  background: linear-gradient(102deg, #e9f9ff 0%, #8be9ff 48%, #b6a1ff 100%);
  color: #04131b;
  font-weight: 600;
  box-shadow: 0 10px 40px -16px rgba(139, 233, 255, 0.65);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 16px 44px -14px rgba(139, 233, 255, 0.8);
}
.btn-primary svg { transition: transform 0.35s var(--ease); }
.btn-primary:hover svg { transform: translateY(3px); }
.btn-ghost {
  border: 1px solid rgba(255, 255, 255, 0.17);
  color: rgba(255, 255, 255, 0.86);
}
.btn-ghost:hover {
  background: rgba(255, 255, 255, 0.06);
  border-color: rgba(255, 255, 255, 0.32);
  transform: translateY(-2px);
}

.hero-hud {
  position: absolute;
  right: var(--pad);
  top: 50%;
  transform: translateY(-46%);
  z-index: 3;
  display: grid;
  gap: 16px;
  width: 170px;
  text-align: right;
  font-family: var(--font-mono);
  text-shadow: 0 1px 10px rgba(0, 0, 0, 0.9);
}
.hud-row {
  display: flex;
  justify-content: flex-end;
  align-items: baseline;
  gap: 12px;
  padding-bottom: 8px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.09);
}
.hud-row span { font-size: 8px; letter-spacing: 0.18em; color: rgba(255, 255, 255, 0.3); }
.hud-row b { font-size: 9.5px; font-weight: 400; letter-spacing: 0.08em; color: rgba(255, 255, 255, 0.7); }
.hud-coord {
  font-size: 8px;
  line-height: 1.9;
  letter-spacing: 0.12em;
  color: rgba(255, 255, 255, 0.22);
}

.hero-foot {
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  bottom: 26px;
  z-index: 3;
  display: flex;
  justify-content: space-between;
  align-items: center;
  pointer-events: none;
  font-family: var(--font-mono);
  font-size: 8.5px;
  letter-spacing: 0.2em;
  color: rgba(255, 255, 255, 0.36);
}
.scroll-hint { display: inline-flex; align-items: center; gap: 12px; }
.scroll-hint i {
  display: block;
  width: 1px;
  height: 30px;
  background: linear-gradient(180deg, transparent, var(--ice));
  position: relative;
  overflow: hidden;
}
.scroll-hint i::after {
  content: "";
  position: absolute;
  inset: 0;
  background: var(--ice);
  animation: scrolldot 2.4s var(--ease-soft) infinite;
}

/* ---------- 6. 跑马灯 ---------- */
.marquee {
  position: relative;
  padding: 18px 0 22px;
  border-block: 1px solid rgba(255, 255, 255, 0.07);
  background: #06070c;
  overflow: hidden;
}
.marquee::before,
.marquee::after {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  width: 12vw;
  z-index: 2;
  pointer-events: none;
}
.marquee::before { left: 0; background: linear-gradient(90deg, #06070c, transparent); }
.marquee::after { right: 0; background: linear-gradient(-90deg, #06070c, transparent); }

.marquee-track {
  display: flex;
  align-items: center;
  gap: 34px;
  width: max-content;
  padding-right: 34px; /* 复制一份内容后，位移 -50% 才能严丝合缝 */
  animation: marquee 46s linear infinite;
  will-change: transform;
}
.marquee:hover .marquee-track { animation-play-state: paused; }
.marquee-track span {
  font-size: 12px;
  letter-spacing: 0.16em;
  color: rgba(255, 255, 255, 0.55);
  white-space: nowrap;
}
.marquee-track i { font-style: normal; color: rgba(139, 233, 255, 0.5); font-size: 9px; }

.marquee-track--ghost {
  margin-top: 14px;
  animation: marquee 64s linear infinite reverse;
}
.marquee-track--ghost span {
  font-family: var(--font-sans);
  font-size: clamp(24px, 3.4vw, 44px);
  font-weight: 700;
  letter-spacing: 0.01em;
  color: transparent;
  -webkit-text-stroke: 1px rgba(255, 255, 255, 0.13);
  line-height: 1;
}
.marquee-track--ghost i { color: rgba(255, 255, 255, 0.16); font-size: 16px; }

/* ---------- 7. 通用标题 ---------- */
.sec-label {
  display: flex;
  align-items: center;
  gap: 11px;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.19em;
  color: rgba(255, 255, 255, 0.4);
}
.sec-label span { color: var(--ice); }
.sec-label::after {
  content: "";
  width: 38px;
  height: 1px;
  background: rgba(255, 255, 255, 0.15);
  margin-left: 3px;
}
.h2 {
  margin-top: 22px;
  font-size: clamp(2.1rem, 4.7vw, 4.2rem);
  line-height: 1.16;
  letter-spacing: -0.025em;
  font-weight: 600;
}
.sec-head {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
  gap: clamp(28px, 5vw, 80px);
  align-items: end;
  margin-bottom: clamp(44px, 6vw, 84px);
}
.sec-desc {
  font-size: 14.5px;
  line-height: 1.95;
  color: var(--muted);
  max-width: 40ch;
  padding-bottom: 6px;
}

/* ---------- 8. Manifesto ---------- */
.manifesto { overflow: hidden; }
.manifesto .wrap, .capabilities .wrap { z-index: 1; }

.statement {
  margin-top: clamp(36px, 5vw, 62px);
  font-family: var(--font-serif);
  font-size: clamp(1.85rem, 5.1vw, 4.6rem);
  font-weight: 400;
  line-height: 1.36;
  letter-spacing: 0.008em;
  color: #f4f7fb;
}
.statement-line { display: block; }
.statement .hl {
  color: var(--ice);
  position: relative;
  padding-inline: 0.02em;
}
.statement .hl::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0.06em;
  height: 1px;
  background: linear-gradient(90deg, rgba(139, 233, 255, 0.55), transparent);
}

.manifesto-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(28px, 5vw, 72px);
  margin-top: clamp(44px, 6vw, 76px);
  max-width: 1080px;
}
.manifesto-grid p {
  font-size: 14.5px;
  line-height: 2.05;
  color: var(--muted);
}
.manifesto-grid p:first-child { color: #b6c0cd; }

/* ---------- 9. 产品 ---------- */
.product {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: clamp(24px, 4vw, 64px);
  align-items: center;
  padding-block: clamp(44px, 6vw, 84px);
  --accent: var(--ice);
}
.product--ice { --accent: #7de3ff; }
.product--violet { --accent: #b9a0ff; }
.product--amber { --accent: #ffc178; }
.product:first-of-type { padding-top: 0; }
.product + .product { border-top: 1px solid rgba(255, 255, 255, 0.06); }

.product-media {
  grid-column: 1 / span 7;
  position: relative;
  aspect-ratio: 16 / 10;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.11);
  background: #070a11;
  box-shadow: 0 40px 90px -50px rgba(0, 0, 0, 0.95), inset 0 1px 0 rgba(255, 255, 255, 0.06);
  transform-style: preserve-3d;
  transition: border-color 0.45s, box-shadow 0.45s;
  isolation: isolate;
}
.product-media::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 4;
  pointer-events: none;
  background: radial-gradient(
    340px circle at var(--mx, 50%) var(--my, 50%),
    rgba(255, 255, 255, 0.07),
    transparent 62%
  );
  opacity: 0;
  transition: opacity 0.4s;
}
.product-media:hover::after { opacity: 1; }
.product:hover .product-media {
  border-color: color-mix(in srgb, var(--accent) 34%, rgba(255, 255, 255, 0.08));
  box-shadow: 0 50px 110px -50px rgba(0, 0, 0, 0.95),
    0 0 70px -34px color-mix(in srgb, var(--accent) 55%, transparent),
    inset 0 1px 0 rgba(255, 255, 255, 0.08);
}
.visual-canvas { width: 100%; height: 100%; }

.media-chrome {
  position: absolute;
  inset: auto 0 0;
  z-index: 3;
  display: flex;
  justify-content: space-between;
  padding: 10px 15px 11px;
  font-family: var(--font-mono);
  font-size: 8.5px;
  letter-spacing: 0.14em;
  color: rgba(255, 255, 255, 0.45);
  background: linear-gradient(0deg, rgba(4, 6, 10, 0.9), transparent);
  pointer-events: none;
}
.live { display: inline-flex; align-items: center; gap: 7px; }
.live i {
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 10px var(--accent);
  animation: blink 2.2s var(--ease-soft) infinite;
}
.media-caption {
  position: absolute;
  right: 15px;
  bottom: 12px;
  z-index: 3;
  font-family: var(--font-mono);
  font-size: 8px;
  letter-spacing: 0.12em;
  color: rgba(255, 255, 255, 0.28);
  pointer-events: none;
  display: none;
}
.corner {
  position: absolute;
  z-index: 3;
  width: 13px;
  height: 13px;
  border: 1px solid var(--accent);
  opacity: 0.45;
  pointer-events: none;
}
.corner--tl { top: 40px; left: 14px; border-right: 0; border-bottom: 0; }
.corner--br { bottom: 14px; right: 14px; border-left: 0; border-top: 0; }

.product-body { grid-column: 8 / span 5; }
.product--flip .product-media { grid-column: 6 / span 7; grid-row: 1; }
.product--flip .product-body { grid-column: 1 / span 5; grid-row: 1; }

.product-index {
  display: flex;
  align-items: center;
  gap: 13px;
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: 0.2em;
  color: rgba(255, 255, 255, 0.42);
}
.product-index span { color: var(--accent); font-size: 11px; }
.product-index i { flex: 1; height: 1px; background: rgba(255, 255, 255, 0.1); }
.product-index em { font-style: normal; color: rgba(255, 255, 255, 0.58); }

.product-name {
  margin-top: 22px;
  font-size: clamp(1.8rem, 2.9vw, 2.6rem);
  line-height: 1.1;
  letter-spacing: -0.015em;
  font-weight: 600;
}
.product-name span {
  display: block;
  margin-top: 12px;
  font-size: 12px;
  font-weight: 400;
  letter-spacing: 0.14em;
  color: rgba(255, 255, 255, 0.58);
}
.product-desc {
  margin-top: 20px;
  font-size: 14px;
  line-height: 2;
  color: #a5afbd;
  max-width: 42ch;
}

.specs {
  display: grid;
  grid-template-columns: 1fr 1fr;
  column-gap: 26px;
  margin-top: 28px;
  border-top: 1px solid rgba(255, 255, 255, 0.09);
}
.specs > div {
  padding: 14px 0 12px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.07);
}
.specs dt {
  font-family: var(--font-mono);
  font-size: 19px;
  line-height: 1.2;
  color: var(--ink);
  letter-spacing: -0.01em;
}
.specs dt span { font-size: 9px; margin-left: 2px; color: var(--muted); }
.specs dd {
  margin: 5px 0 0;
  font-size: 10.5px;
  letter-spacing: 0.02em;
  color: var(--muted-dim);
}

.product-link {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  margin-top: 26px;
  padding-bottom: 6px;
  font-size: 12.5px;
  letter-spacing: 0.02em;
  color: rgba(255, 255, 255, 0.88);
  border-bottom: 1px solid rgba(255, 255, 255, 0.2);
  transition: color 0.3s, border-color 0.3s;
}
.product-link svg { width: 14px; height: 14px; transition: transform 0.35s var(--ease); }
.product-link:hover { color: var(--accent); border-color: var(--accent); }
.product-link:hover svg { transform: translate(3px, -3px); }

/* ---------- 10. 能力 Bento ---------- */
.bento {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 14px;
}
.bento-card {
  position: relative;
  grid-column: span 2;
  display: flex;
  flex-direction: column;
  padding: clamp(22px, 2.4vw, 32px);
  border: 1px solid rgba(255, 255, 255, 0.085);
  border-radius: var(--radius);
  background: linear-gradient(165deg, rgba(255, 255, 255, 0.045), rgba(255, 255, 255, 0.008) 62%);
  overflow: hidden;
  transition: border-color 0.45s, transform 0.45s var(--ease), background-color 0.45s;
}
.bento-card::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background: radial-gradient(
    420px circle at var(--mx, 50%) var(--my, 50%),
    rgba(139, 233, 255, 0.075),
    transparent 62%
  );
  opacity: 0;
  transition: opacity 0.45s;
}
.bento-card:hover::before { opacity: 1; }
.bento-card:hover {
  border-color: rgba(139, 233, 255, 0.24);
  transform: translateY(-3px);
}
.bento-card > * { position: relative; z-index: 1; }
.bento-card--wide { grid-column: span 4; }
.bento-card--full { grid-column: span 6; }

.bento-kicker {
  font-family: var(--font-mono);
  font-size: 8.5px;
  letter-spacing: 0.18em;
  color: rgba(255, 255, 255, 0.36);
}
.bento-card h3 {
  margin-top: 13px;
  font-size: clamp(19px, 1.75vw, 23px);
  font-weight: 600;
  letter-spacing: -0.01em;
  line-height: 1.35;
}
.bento-card p {
  margin-top: 12px;
  font-size: 13px;
  line-height: 1.9;
  color: var(--muted);
  max-width: 46ch;
}

.code-window {
  margin-top: 26px;
  background: #04070c;
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 12px;
  overflow: hidden;
  font-family: var(--font-mono);
  font-size: 11px;
  line-height: 1.85;
}
.code-bar {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 9px 13px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.07);
  background: rgba(255, 255, 255, 0.02);
}
.code-bar i { width: 6px; height: 6px; border-radius: 50%; background: rgba(255, 255, 255, 0.16); }
.code-bar span {
  margin-left: 6px;
  font-size: 9px;
  letter-spacing: 0.08em;
  color: rgba(255, 255, 255, 0.3);
}
.code-window pre { margin: 0; padding: 15px 16px; overflow-x: auto; color: #93a4b8; }
.code-window code { font-family: inherit; }
.c-key { color: #a78bfa; }
.c-str { color: #8be9ff; }
.c-fn { color: #ffd28f; }
.c-num { color: #ff9e7a; }

.chips { display: flex; flex-wrap: wrap; gap: 7px; margin-top: 18px; }
.chips span {
  padding: 4px 10px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: 0.06em;
  color: rgba(255, 255, 255, 0.5);
}

.meter { display: flex; align-items: center; gap: 18px; margin-top: auto; padding-top: 26px; }
.meter-ring {
  width: 88px;
  height: 88px;
  flex: none;
  border-radius: 50%;
  border: 1px solid rgba(139, 233, 255, 0.28);
  background: radial-gradient(circle, rgba(139, 233, 255, 0.09), transparent 68%);
  display: grid;
  place-items: center;
  text-align: center;
  gap: 0;
  animation: breathe 6s var(--ease-soft) infinite;
}
.meter-ring span {
  font-family: var(--font-mono);
  font-size: 25px;
  line-height: 1;
  color: var(--ice);
}
.meter-ring em {
  font-style: normal;
  font-family: var(--font-mono);
  font-size: 7px;
  line-height: 1.5;
  letter-spacing: 0.08em;
  color: rgba(255, 255, 255, 0.4);
}
.meter-list { display: grid; gap: 7px; font-size: 10.5px; color: var(--muted); }
.meter-list li { display: flex; align-items: center; gap: 7px; }
.meter-list i {
  width: 3px;
  height: 3px;
  border-radius: 50%;
  background: var(--ice);
  flex: none;
}

.orbit { position: relative; width: 140px; height: 140px; margin: auto auto 0; padding-top: 0; }
.orbit-ring {
  position: absolute;
  inset: 0;
  border: 1px solid rgba(167, 139, 250, 0.25);
  border-radius: 50%;
  animation: spin 18s linear infinite;
}
.orbit-ring::after {
  content: "";
  position: absolute;
  top: -2px;
  left: 50%;
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--violet);
  box-shadow: 0 0 10px var(--violet);
}
.orbit-ring--2 { inset: 18px; animation-duration: 12s; animation-direction: reverse; border-color: rgba(139, 233, 255, 0.2); }
.orbit-ring--2::after { background: var(--ice); box-shadow: 0 0 10px var(--ice); }
.orbit-ring--3 { inset: 36px; animation-duration: 24s; border-style: dashed; border-color: rgba(255, 255, 255, 0.12); }
.orbit-ring--3::after { display: none; }
.orbit-core {
  position: absolute;
  inset: 50%;
  width: 8px;
  height: 8px;
  margin: -4px;
  border-radius: 50%;
  background: var(--ink);
  box-shadow: 0 0 26px 6px rgba(167, 139, 250, 0.55);
}

.viz-chart { width: 100%; height: auto; margin-top: auto; padding-top: 18px; }
.viz-grid path { stroke: rgba(255, 255, 255, 0.07); stroke-width: 1; }
.viz-line {
  stroke-dasharray: 520;
  stroke-dashoffset: 520;
  animation: draw 3s var(--ease) 0.2s forwards;
  filter: drop-shadow(0 0 8px rgba(139, 233, 255, 0.45));
}
.viz-area { opacity: 0; animation: fadein 1.4s var(--ease) 1.2s forwards; }
.viz-dot { animation: blink 2.4s var(--ease-soft) infinite; }

.flow {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: auto;
  padding-top: 24px;
}
.flow-node {
  padding: 9px 16px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 999px;
  font-size: 11px;
  letter-spacing: 0.04em;
  color: rgba(255, 255, 255, 0.72);
  background: rgba(255, 255, 255, 0.02);
}
.flow-node--hot {
  border-color: rgba(139, 233, 255, 0.5);
  color: var(--ice);
  box-shadow: 0 0 26px -8px rgba(139, 233, 255, 0.6);
  animation: breathe 4s var(--ease-soft) infinite;
}
.flow i {
  width: 26px;
  height: 1px;
  background: linear-gradient(90deg, rgba(255, 255, 255, 0.28), rgba(139, 233, 255, 0.4));
}

/* ---------- 11. 信念 ---------- */
.beliefs-grid {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
  gap: clamp(36px, 7vw, 110px);
  align-items: start;
}
.beliefs-lead { position: sticky; top: 118px; }
.belief-quote {
  margin-top: 26px;
  font-family: var(--font-serif);
  font-size: clamp(1.7rem, 3.15vw, 2.9rem);
  line-height: 1.46;
  color: #f4f7fb;
}
.beliefs-note {
  margin-top: 26px;
  font-size: 12.5px;
  line-height: 1.9;
  color: var(--muted-dim);
  max-width: 26ch;
}
.principle-list { border-top: 1px solid rgba(255, 255, 255, 0.09); }
.principle-list li {
  display: grid;
  grid-template-columns: 54px 1fr;
  gap: 16px;
  padding: 28px 0 30px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  transition: padding-left 0.45s var(--ease), background-color 0.4s;
}
.principle-list li:hover { padding-left: 10px; }
.p-index {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.1em;
  color: rgba(255, 255, 255, 0.28);
  padding-top: 5px;
  transition: color 0.3s;
}
.principle-list li:hover .p-index { color: var(--ice); }
.principle-list h3 { font-size: clamp(18px, 1.7vw, 21px); font-weight: 600; letter-spacing: -0.01em; }
.principle-list p { margin-top: 9px; font-size: 13px; line-height: 1.95; color: var(--muted); max-width: 50ch; }

/* ---------- 12. 关于 ---------- */
.about-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
  gap: clamp(32px, 6vw, 88px);
  align-items: start;
}
.about-copy { display: grid; gap: 22px; }
.about-copy p { font-size: 14.5px; line-height: 2.1; color: #a5afbd; max-width: 58ch; }
.about-copy p:first-child { color: #c3ccd8; }

.about-panel {
  border: 1px solid rgba(255, 255, 255, 0.09);
  border-radius: var(--radius);
  padding: 26px 28px 24px;
  background: linear-gradient(170deg, rgba(255, 255, 255, 0.04), rgba(255, 255, 255, 0.01));
}
.panel-label {
  font-family: var(--font-mono);
  font-size: 8.5px;
  letter-spacing: 0.18em;
  color: rgba(255, 255, 255, 0.34);
  padding-bottom: 14px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}
.panel-list li {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 18px;
  padding: 11px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}
.panel-list span { font-size: 10.5px; letter-spacing: 0.06em; color: var(--muted-dim); flex: none; }
.panel-list b { font-size: 12px; font-weight: 500; text-align: right; color: #d8e0ea; }
.panel-links { display: grid; gap: 7px; margin-top: 18px; }
.panel-links a {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.04em;
  color: rgba(139, 233, 255, 0.66);
  transition: color 0.25s;
}
.panel-links a:hover { color: var(--ice); }

.stat-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin-top: clamp(56px, 7vw, 90px);
  border-top: 1px solid rgba(255, 255, 255, 0.09);
}
.stat-row > div { padding-top: 24px; }
.stat-row dt {
  font-family: var(--font-mono);
  font-size: clamp(2.2rem, 4.4vw, 3.8rem);
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--ink);
  font-variant-numeric: tabular-nums;
}
.stat-row .plus { font-size: 0.5em; color: var(--ice); margin-left: 2px; vertical-align: super; }
.stat-row dd {
  margin: 12px 0 0;
  font-size: 10.5px;
  letter-spacing: 0.1em;
  color: var(--muted-dim);
}

/* ---------- 13. 联系 ---------- */
.contact { overflow: hidden; }
.contact-glow {
  position: absolute;
  right: -16%;
  top: -20%;
  width: 74vw;
  height: 74vw;
  max-width: 1000px;
  max-height: 1000px;
  pointer-events: none;
  background:
    radial-gradient(circle at 40% 40%, rgba(139, 233, 255, 0.16), transparent 58%),
    radial-gradient(circle at 66% 62%, rgba(167, 139, 250, 0.14), transparent 56%);
  filter: blur(10px);
}
.contact .wrap { z-index: 1; }
.contact-title {
  margin-top: 22px;
  font-size: clamp(2.7rem, 7vw, 6.4rem);
  line-height: 1.08;
  letter-spacing: -0.035em;
  font-weight: 600;
}
.contact-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
  gap: clamp(32px, 6vw, 80px);
  align-items: start;
  margin-top: clamp(40px, 5vw, 64px);
}
.contact-lede { font-size: 14.5px; line-height: 2; color: var(--muted); max-width: 42ch; }
.mail-row {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 18px;
  margin-top: 30px;
}
.mail {
  font-family: var(--font-mono);
  font-size: clamp(1.1rem, 2.3vw, 2rem);
  letter-spacing: -0.01em;
  color: var(--ink);
  padding-bottom: 8px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.2);
  transition: color 0.3s, border-color 0.3s;
}
.mail:hover { color: var(--ice); border-color: var(--ice); }
.copy-btn {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  height: 34px;
  padding: 0 13px;
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: 999px;
  font-size: 10.5px;
  color: var(--muted);
  transition: color 0.25s, border-color 0.25s, background-color 0.25s;
}
.copy-btn svg { width: 13px; height: 13px; }
.copy-btn:hover { color: var(--ink); border-color: rgba(255, 255, 255, 0.34); background: rgba(255, 255, 255, 0.05); }
.copy-btn.is-done { color: var(--ice); border-color: rgba(139, 233, 255, 0.5); }

.contact-cards { display: grid; gap: 12px; }
.contact-card {
  display: flex;
  flex-direction: column;
  gap: 5px;
  padding: 19px 22px;
  border: 1px solid rgba(255, 255, 255, 0.09);
  border-radius: 15px;
  background: rgba(255, 255, 255, 0.022);
  transition: border-color 0.3s, background-color 0.3s, transform 0.4s var(--ease);
}
.contact-card:hover {
  border-color: rgba(139, 233, 255, 0.28);
  background: rgba(139, 233, 255, 0.04);
  transform: translateY(-2px);
}
.contact-card span { font-family: var(--font-mono); font-size: 8.5px; letter-spacing: 0.16em; color: var(--muted-dim); }
.contact-card b { font-size: 16px; font-weight: 500; letter-spacing: 0.01em; }
.contact-card em { font-style: normal; font-size: 10px; letter-spacing: 0.04em; color: var(--muted-dim); }

/* ---------- 14. 页脚 ---------- */
.site-footer {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding: clamp(48px, 6vw, 74px) 0 30px;
  background: #04050a;
}
.footer-top {
  display: grid;
  grid-template-columns: minmax(0, 1.8fr) 1fr 1fr;
  gap: 40px;
}
.footer-brand .brand-mark { width: 30px; height: 30px; }
.footer-brand p { margin-top: 18px; font-size: 12.5px; color: var(--muted-dim); letter-spacing: 0.04em; }
.footer-title {
  font-family: var(--font-mono);
  font-size: 8.5px;
  letter-spacing: 0.18em;
  color: rgba(255, 255, 255, 0.52);
  margin-bottom: 14px;
}
.footer-col { display: flex; flex-direction: column; align-items: flex-start; }
.footer-col a {
  font-size: 12.5px;
  padding: 5px 0;
  color: rgba(255, 255, 255, 0.62);
  transition: color 0.25s, transform 0.3s var(--ease);
}
.footer-col a:hover { color: var(--ink); transform: translateX(3px); }
.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px 24px;
  margin-top: clamp(40px, 5vw, 60px);
  padding-top: 20px;
  border-top: 1px solid rgba(255, 255, 255, 0.07);
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: 0.05em;
  color: rgba(255, 255, 255, 0.52);
}
.footer-bottom a { color: rgba(255, 255, 255, 0.48); transition: color 0.25s; }
.footer-bottom a:hover { color: var(--ice); }
.footer-bottom .dot { margin: 0 6px; opacity: 0.4; }
.footer-made { letter-spacing: 0.16em; color: rgba(255, 255, 255, 0.46); }

.noscript {
  position: fixed;
  left: 50%;
  bottom: 18px;
  transform: translateX(-50%);
  z-index: 150;
  padding: 10px 16px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.92);
  color: #05060a;
  font-size: 11px;
}

/* ---------- 15. 入场动效 ---------- */
.js .reveal {
  opacity: 0;
  transform: translateY(26px);
  transition: opacity 0.95s var(--ease), transform 0.95s var(--ease);
}
.js .reveal.is-in { opacity: 1; transform: none; }
.js .statement-line.reveal { transform: translateY(30px); }
/* 脚本异常时的兜底：内容永远比动效重要 */
.js.reveal-fallback .reveal { opacity: 1; transform: none; }

@keyframes rise {
  to { opacity: 1; transform: none; }
}
@keyframes ping {
  0% { box-shadow: 0 0 0 0 rgba(139, 233, 255, 0.5); }
  70% { box-shadow: 0 0 0 12px rgba(139, 233, 255, 0); }
  100% { box-shadow: 0 0 0 0 rgba(139, 233, 255, 0); }
}
@keyframes blink {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.35; }
}
@keyframes spin { to { transform: rotate(360deg); } }
@keyframes marquee { to { transform: translateX(-50%); } }
@keyframes introbar { to { transform: scaleX(1); } }
@keyframes scrolldot {
  0% { transform: translateY(-100%); opacity: 0; }
  40% { opacity: 1; }
  100% { transform: translateY(100%); opacity: 0; }
}
@keyframes draw { to { stroke-dashoffset: 0; } }
@keyframes fadein { to { opacity: 1; } }
@keyframes breathe {
  0%, 100% { transform: scale(1); opacity: 1; }
  50% { transform: scale(1.035); opacity: 0.86; }
}

/* ---------- 16. 响应式 ---------- */
@media (max-width: 1200px) {
  .hero-hud { display: none; }
  .hero-title { max-width: none; }
}

@media (max-width: 1080px) {
  .nav { display: none; }
  .header-cta { margin-left: auto; }
  .menu-btn { display: block; margin-left: 12px; }

  .product,
  .product--flip { grid-template-columns: 1fr; }
  .product-media,
  .product--flip .product-media { grid-column: auto; grid-row: auto; }
  .product-body,
  .product--flip .product-body { grid-column: auto; grid-row: auto; }
  .product-body { margin-top: 8px; }
  .product-desc { max-width: 60ch; }
  .specs { max-width: 520px; }

  .bento-card,
  .bento-card--wide { grid-column: span 3; }
  .bento-card--full { grid-column: span 6; }
  .bento-card--wide .code-window { margin-top: 20px; }
}

@media (max-width: 900px) {
  .sec-head { grid-template-columns: 1fr; gap: 18px; }
  .sec-desc { max-width: 52ch; }
  .manifesto-grid { grid-template-columns: 1fr; gap: 20px; }
  .beliefs-grid { grid-template-columns: 1fr; }
  .beliefs-lead { position: static; }
  .beliefs-note { max-width: 40ch; }
  .about-grid { grid-template-columns: 1fr; }
  .about-panel { max-width: 560px; }
  .contact-grid { grid-template-columns: 1fr; }
  .contact-cards { grid-template-columns: 1fr 1fr; }
  .contact-card { height: 100%; }
  .line-note { display: none; }
  .hero-title { font-size: clamp(2.9rem, 10.5vw, 6rem); }
}

@media (max-width: 720px) {
  .header-cta { display: none; }
  .menu-btn { margin-left: auto; }
  .site-header { gap: 14px; padding-block: 14px; }
  .brand-text i { display: none; }

  .hero { min-height: auto; padding-top: 150px; padding-bottom: 110px; }
  .hero-title { font-size: clamp(2.7rem, 12.6vw, 5rem); letter-spacing: -0.04em; }
  .hero-bottom { grid-template-columns: 1fr; gap: 26px; }
  .hero-lede { font-size: 13.5px; line-height: 2; }
  .hero-actions .btn { flex: 1; min-width: 150px; }
  .hero-foot { display: none; }
  .hero-eyebrow { font-size: 8.5px; letter-spacing: 0.12em; }

  .marquee-track--ghost { display: none; }
  .marquee { padding-block: 14px; }

  .statement { font-size: clamp(1.65rem, 7.4vw, 2.6rem); line-height: 1.45; }
  .statement .hl::after { display: none; }
  .sec-label { font-size: 9px; }

  .product { padding-block: 44px; }
  .product-media { aspect-ratio: 4 / 3; border-radius: 15px; }
  .media-chrome { font-size: 7.5px; padding: 9px 11px; }
  .media-caption { display: none; }
  .corner--tl { top: 34px; left: 10px; }
  .corner--br { bottom: 10px; right: 10px; }
  .product-name { font-size: 1.8rem; }
  .product-desc { font-size: 13.5px; }
  .specs { column-gap: 18px; }
  .specs dt { font-size: 17px; }

  .bento { gap: 10px; }
  .bento-card, .bento-card--wide, .bento-card--full { grid-column: span 6; }
  .bento-card { padding: 22px; }
  .code-window { font-size: 10px; }
  .flow { gap: 5px; }
  .flow-node { padding: 6px 10px; font-size: 9.5px; }
  .flow i { width: 10px; }
  .principle-list li { grid-template-columns: 38px 1fr; gap: 10px; padding: 24px 0; }
  .stat-row { grid-template-columns: 1fr 1fr; gap: 26px 20px; margin-top: 48px; }
  .stat-row dt { font-size: 2.5rem; }

  .contact-title { font-size: clamp(2.4rem, 11vw, 3.6rem); }
  .contact-cards { grid-template-columns: 1fr; }
  .mail { font-size: 1.15rem; }
  .contact-glow { width: 120vw; height: 120vw; right: -40%; top: -10%; }

  .footer-top { grid-template-columns: 1fr 1fr; gap: 32px 24px; }
  .footer-brand { grid-column: 1 / -1; }
  .footer-bottom { flex-direction: column; align-items: flex-start; }
  .footer-made { display: none; }
}

@media (max-width: 400px) {
  .hero-actions .btn { width: 100%; flex: none; }
  .hero-eyebrow { letter-spacing: 0.06em; }
  .brand-text b { letter-spacing: 0.18em; }
}

/* ---------- 17. 可访问性：减少动效 ---------- */
@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;
  }
  .js .reveal { opacity: 1; transform: none; }
  .hero-title .line-inner { transition: none; }
  html.js .hero-title .line-inner { transform: none; }
  .hero-eyebrow, .hero-bottom { opacity: 1; transform: none; }
  .marquee-track { animation: none; }
  .intro { display: none; }
  .cursor { display: none !important; }
  html.has-cursor .cursor { display: none; }
  html.has-cursor, html.has-cursor * { cursor: auto; }
}