/* ============================================================
   光子律动 · 公司官网样式
   基于 Pulse 设计系统 (v2 - 白色透亮主题)
   ============================================================ */

@import url("design-system.css");

/* 设计系统补充：覆盖 token 让整体更透亮、可访问性达标 */
:root {
  --pulse-bg: #FFFFFF;
  --pulse-bg-2: #F8F7FC;   /* 透亮浅紫白 */
  --pulse-bg-3: #F1EEFA;   /* 浅紫雾 */
  --pulse-bg-4: #EEF2F7;   /* 浅蓝灰雾 (Cube section) */
  --pulse-bg-5: #FAF7F2;   /* 浅米白 (Lite section) */

  /* 可访问性 — 紫色对比度增强：原 #8464F4 在白底仅 4.2:1，改用更深紫做小字 */
  --pulse-purple-accessible: #6537E5;   /* 用于 eyebrows/tags 在白底 — 5.4:1 */
  --pulse-purple-deep: #4B23B8;          /* 标题强调 — 8.4:1 */

  /* 字号最小 14px */
  --t-tiny: 14px;
  --t-small: 14px;
}

/* ===== 基础重置 ===== */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--pulse-bg);
  color: var(--pulse-ink);
  font-family: var(--font-cn);
  font-size: 16px;
  line-height: var(--lh-body);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { font: inherit; cursor: pointer; }
section { scroll-margin-top: 84px; }

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 60px;
}
.num { font-feature-settings: "tnum" 1, "lnum" 1; }

/* feature-pano 内部也需要受 max-width 约束 */
.feature-pano,
.pp-overview { max-width: 1080px; margin-left: auto; margin-right: auto; }

/* ============================================================
   导航
   ============================================================ */
.nav {
  position: fixed; top: 0; left: 0; right: 0;
  z-index: 100;
  height: 76px;
  display: flex; align-items: center;
  background: transparent;
  transition: background var(--dur) var(--ease),
              backdrop-filter var(--dur) var(--ease),
              border-color var(--dur) var(--ease),
              color var(--dur) var(--ease);
  color: var(--fg-on-dark);
  border-bottom: 1px solid transparent;
}
.nav.is-scrolled {
  background: rgba(255, 255, 255, 0.78);
  backdrop-filter: blur(20px) saturate(1.4);
  -webkit-backdrop-filter: blur(20px) saturate(1.4);
  border-bottom-color: rgba(21, 18, 35, 0.08);
  color: var(--pulse-ink);
}
.nav__inner {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 60px;
  display: flex; align-items: center; justify-content: space-between;
  gap: var(--s-6);
}

/* logo — 双图切换 */
.nav__brand { display: flex; align-items: center; gap: 12px; color: inherit; }
.nav__logo { height: 28px; width: auto; display: block; transition: opacity var(--dur) var(--ease); }
.nav__logo--white { display: block; }
.nav__logo--dark  { display: none; }
.nav.is-scrolled .nav__logo--white { display: none; }
.nav.is-scrolled .nav__logo--dark  { display: block; }

/* nav 链接 */
.nav__links {
  display: flex; align-items: center; gap: 40px;
  margin: 0; padding: 0; list-style: none;
}
.nav__links > li { position: relative; }
.nav__links a, .nav__links .nav__btn {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-cn);
  font-size: 15px;
  font-weight: 500;
  letter-spacing: 0.02em;
  color: inherit;
  padding: 10px 2px;
  background: none;
  border: 0;
  cursor: pointer;
  transition: color var(--dur) var(--ease);
}
.nav__links a:hover, .nav__links .nav__btn:hover { color: var(--pulse-purple); }
.nav__links a.is-active::after,
.nav__links .nav__btn.is-active::after {
  content: ""; position: absolute;
  left: 0; right: 0; bottom: 0;
  height: 2px;
  background: var(--pulse-purple);
  border-radius: 2px;
}
.nav__chev {
  width: 10px; height: 10px;
  border-right: 1.5px solid currentColor;
  border-bottom: 1.5px solid currentColor;
  transform: rotate(45deg) translate(-2px, -2px);
  transition: transform var(--dur) var(--ease);
  display: inline-block;
}
.nav__item--open .nav__chev { transform: rotate(-135deg) translate(-2px, -2px); }

/* dropdown */
.nav__dropdown {
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%) translateY(-4px);
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(20px) saturate(1.4);
  -webkit-backdrop-filter: blur(20px) saturate(1.4);
  border: 1px solid rgba(21, 18, 35, 0.08);
  border-radius: 16px;
  padding: 12px;
  margin-top: 6px;       /* 视觉间隔 */
  min-width: 220px;
  list-style: none;
  box-shadow: 0 24px 64px rgba(21, 18, 35, 0.12);
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--dur) var(--ease), transform var(--dur) var(--ease);
}
/* 不可见的 hover bridge — 防止鼠标从按钮移动到菜单过程中菜单消失 */
.nav__item--has-dropdown::after {
  content: "";
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%);
  width: 100%;
  height: 16px;
  pointer-events: none;
}
.nav__item--has-dropdown:hover::after { pointer-events: auto; }
.nav__item--has-dropdown:hover .nav__dropdown,
.nav__item--open .nav__dropdown {
  opacity: 1;
  pointer-events: auto;
  transform: translateX(-50%) translateY(0);
}
.nav__dropdown a {
  display: flex;
  flex-direction: column;
  padding: 12px 16px;
  border-radius: 10px;
  color: var(--pulse-ink);
  font-size: 15px;
  font-weight: 500;
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease);
}
.nav__dropdown a small {
  display: block;
  font-family: var(--font-en);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.12em;
  color: var(--pulse-purple-accessible);
  margin-bottom: 2px;
}
.nav__dropdown a:hover {
  background: var(--pulse-bg-3);
  color: var(--pulse-purple-deep);
}

/* mobile hamburger */
.nav__toggle {
  display: none;
  width: 40px; height: 40px;
  border: 1px solid currentColor;
  background: transparent;
  color: inherit;
  border-radius: 10px;
  padding: 0;
  align-items: center; justify-content: center;
}
.nav__toggle span,
.nav__toggle span::before,
.nav__toggle span::after {
  display: block; width: 18px; height: 1.5px;
  background: currentColor; position: relative;
}
.nav__toggle span::before, .nav__toggle span::after {
  content: ""; position: absolute; left: 0;
}
.nav__toggle span::before { top: -6px; }
.nav__toggle span::after  { top: 6px; }

/* ============================================================
   Hero
   ============================================================ */
.hero {
  position: relative;
  min-height: 100vh;
  min-height: 100svh;
  display: flex; align-items: center;
  background: var(--pulse-black);
  color: var(--fg-on-dark);
  overflow: hidden;
  padding: 140px 0 96px;
}
.hero__bg {
  position: absolute; inset: 0;
  background: var(--pulse-gradient-base);
  z-index: 0;
}
.hero__bg::after {
  content: ""; position: absolute; inset: 0;
  background: var(--pulse-gradient-overlay);
  mix-blend-mode: lighten;
}
.hero__grid {
  position: absolute; inset: 0; z-index: 1;
  background-image:
    linear-gradient(rgba(255,255,255,0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.05) 1px, transparent 1px);
  background-size: 96px 96px;
  mask-image: radial-gradient(ellipse at 70% 50%, black 0%, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse at 70% 50%, black 0%, transparent 75%);
  pointer-events: none;
}
.hero__sparkles { position: absolute; inset: 0; z-index: 1; pointer-events: none; }
.hero__sparkles span {
  position: absolute;
  background: #fff;
  border-radius: 50%;
  box-shadow: 0 0 8px rgba(255,255,255,0.6);
  animation: twinkle 4s ease-in-out infinite;
}
@keyframes twinkle {
  0%, 100% { opacity: 0.2; transform: scale(0.8); }
  50%      { opacity: 0.9; transform: scale(1.2); }
}
.hero__inner {
  position: relative; z-index: 2;
  width: 100%; max-width: 1200px;
  margin: 0 auto; padding: 0 60px;
}
.hero__title {
  font-family: var(--font-cn);
  font-weight: 200;
  font-size: clamp(40px, 6.4vw, 88px);
  line-height: 1.15;
  letter-spacing: -0.03em;
  margin: 0;
  color: #fff;
  text-wrap: balance;
  max-width: 16ch;
}
.hero__subtitle {
  margin-top: 24px;
  font-family: var(--font-cn);
  font-weight: 300;
  font-size: clamp(20px, 2.2vw, 30px);
  line-height: 1.45;
  letter-spacing: -0.02em;
  color: rgba(255,255,255,0.92);
  max-width: 32ch;
}
.hero__ctas {
  margin-top: 56px;
  display: flex; gap: 16px; flex-wrap: wrap;
}

/* pill CTA */
.pill-cta {
  display: inline-flex; align-items: center;
  gap: 14px;
  padding: 16px 28px;
  border-radius: var(--r-pill);
  border: 1px solid currentColor;
  background: transparent;
  font-family: var(--font-cn);
  font-size: 16px;
  font-weight: 500;
  letter-spacing: -0.01em;
  color: inherit;
  cursor: pointer;
  transition: background var(--dur) var(--ease),
              color var(--dur) var(--ease),
              border-color var(--dur) var(--ease),
              transform var(--dur) var(--ease);
}
.pill-cta--solid   { background: #fff; color: var(--pulse-ink); border-color: #fff; }
.pill-cta--solid:hover { background: var(--pulse-purple); border-color: var(--pulse-purple); color: #fff; }
.pill-cta--ghost   { color: #fff; }
.pill-cta--ghost:hover { background: rgba(255,255,255,0.1); }
.pill-cta--dark    { color: var(--pulse-ink); }
.pill-cta--dark:hover { background: var(--pulse-ink); color: #fff; }
.pill-cta__arrow   { transition: transform var(--dur) var(--ease); }
.pill-cta:hover .pill-cta__arrow { transform: translateX(4px); }

.hero__scroll-cue {
  position: absolute; bottom: 28px; left: 50%;
  transform: translateX(-50%);
  z-index: 2;
  font-family: var(--font-en);
  font-size: 14px;
  font-weight: 500;
  letter-spacing: 0.2em;
  color: rgba(255,255,255,0.78);
  display: flex; flex-direction: column;
  align-items: center; gap: 10px;
}
.hero__scroll-cue::after {
  content: "";
  width: 1px; height: 32px;
  background: linear-gradient(to bottom, rgba(255,255,255,0.7), transparent);
  animation: scroll-pulse 2s ease-out infinite;
}
@keyframes scroll-pulse {
  0%   { transform: translateY(-10px); opacity: 0; }
  40%  { opacity: 1; }
  100% { transform: translateY(10px); opacity: 0; }
}

/* ============================================================
   通用 section
   ============================================================ */
.section {
  padding: 120px 0;
  position: relative;
}
.section--tinted-purple {
  background:
    radial-gradient(ellipse 800px 600px at 80% 0%, rgba(132, 100, 244, 0.10), transparent 60%),
    radial-gradient(ellipse 700px 500px at 0% 80%, rgba(193, 184, 241, 0.18), transparent 60%),
    var(--pulse-bg-2);
}
.section--tinted-slate {
  background:
    radial-gradient(ellipse 900px 600px at 20% 10%, rgba(96, 93, 200, 0.07), transparent 60%),
    radial-gradient(ellipse 700px 500px at 90% 60%, rgba(160, 165, 200, 0.12), transparent 60%),
    var(--pulse-bg-4);
}
.section--tinted-warm {
  background:
    radial-gradient(ellipse 600px 400px at 70% 20%, rgba(241, 238, 255, 0.6), transparent 60%),
    var(--pulse-bg-2);
}

.section--dark {
  background: var(--pulse-black);
  color: var(--fg-on-dark);
  position: relative;
  overflow: hidden;
}
.section--dark > .section__bg {
  position: absolute; inset: 0;
  background: var(--pulse-gradient-base);
  opacity: 0.55;
  z-index: 0;
}
.section--dark > .section__bg::after {
  content: ""; position: absolute; inset: 0;
  background: var(--pulse-gradient-overlay);
  mix-blend-mode: lighten;
}
.section--dark > .container { position: relative; z-index: 1; }

.section__eyebrow {
  font-family: var(--font-en);
  font-weight: 500;
  font-size: 14px;
  letter-spacing: 0.18em;
  color: var(--pulse-purple-accessible);
  text-transform: uppercase;
  margin-bottom: 18px;
}
.section--dark .section__eyebrow { color: var(--pulse-purple-300); }
.section__title {
  font-family: var(--font-cn);
  font-weight: 300;
  font-size: clamp(30px, 4vw, 52px);
  line-height: 1.2;
  letter-spacing: -0.03em;
  margin: 0;
  color: var(--pulse-ink);
}
.section--dark .section__title { color: #fff; }
.section__subtitle {
  margin-top: 18px;
  font-family: var(--font-cn);
  font-weight: 400;
  font-size: 20px;
  line-height: 1.55;
  color: var(--pulse-ink-2);
  max-width: 60ch;
}
.section--dark .section__subtitle { color: rgba(255,255,255,0.86); }
.section__head { margin-bottom: 64px; }
.section__head--center { text-align: center; }
.section__head--center .section__subtitle { margin-left: auto; margin-right: auto; }

/* 通用小 tag/eyebrow */
.tag {
  font-family: var(--font-en);
  font-weight: 500;
  font-size: 14px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--pulse-purple-accessible);
}
.tag--cn {
  font-family: var(--font-cn);
  font-weight: 500;
  letter-spacing: 0.04em;
  text-transform: none;
}
.tag--on-dark { color: var(--pulse-purple-300); }

/* ============================================================
   Advantages (四大核心优势)
   ============================================================ */
.section--advantages {
  background: var(--pulse-black);
  color: var(--fg-on-dark);
  position: relative;
  overflow: hidden;
}
.section--advantages .section__bg {
  position: absolute; inset: 0;
  background: var(--pulse-gradient-wide);
  mix-blend-mode: lighten;
  opacity: 0.7;
  z-index: 0;
}
.section--advantages > .container { position: relative; z-index: 1; }
.section--advantages .section__eyebrow { color: var(--pulse-purple-300); }
.section--advantages .section__subtitle { color: rgba(255,255,255,0.86); }

.advantages {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.advantage {
  background: rgba(255, 255, 255, 0.06);
  backdrop-filter: blur(20px) saturate(1.4);
  -webkit-backdrop-filter: blur(20px) saturate(1.4);
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 20px;
  padding: 32px 28px 36px;
  display: flex; flex-direction: column;
  gap: 18px;
  min-height: 320px;
  transition: transform 320ms var(--ease), border-color 320ms var(--ease), background 320ms var(--ease);
}
.advantage:hover {
  transform: translateY(-4px);
  background: rgba(255, 255, 255, 0.10);
  border-color: rgba(255, 255, 255, 0.28);
}
.advantage__num {
  font-family: var(--font-en);
  font-weight: 500;
  font-size: 14px;
  letter-spacing: 0.2em;
  color: var(--pulse-purple-300);
}
.advantage__title {
  font-family: var(--font-cn);
  font-weight: 600;
  font-size: 24px;
  line-height: 1.35;
  letter-spacing: -0.02em;
  color: #fff;
  margin: 0;
}
.advantage__title em {
  font-style: normal;
  font-weight: 300;
  color: rgba(255,255,255,0.78);
  display: block;
  font-size: 17px;
  letter-spacing: 0;
  margin-top: 6px;
}
.advantage__body {
  font-family: var(--font-cn);
  font-weight: 400;
  font-size: 15px;
  line-height: 1.75;
  color: rgba(255,255,255,0.86);
  margin: 0;
  margin-top: auto;
}

.advantages-banner {
  margin-top: 56px;
  padding: 32px 40px;
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 16px;
  display: flex; align-items: center; justify-content: space-between;
  gap: 24px; flex-wrap: wrap;
  background: rgba(255,255,255,0.04);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
}
.advantages-banner__title {
  font-family: var(--font-cn);
  font-weight: 600;
  font-size: 22px;
  letter-spacing: -0.01em;
  color: #fff;
  margin: 0;
}
.advantages-banner__tags {
  display: flex; gap: 24px; flex-wrap: wrap;
  color: var(--pulse-purple-300);
  font-family: var(--font-cn);
  font-size: 16px;
  font-weight: 500;
}
.advantages-banner__tags span { display: inline-flex; align-items: center; gap: 8px; }
.advantages-banner__tags span::before {
  content: ""; width: 6px; height: 6px; border-radius: 50%;
  background: var(--pulse-purple);
}

/* ============================================================
   Products — 整体白底，三个子产品各自不同 tint
   ============================================================ */
.section--products {
  background: var(--pulse-bg);
  padding: 0;
}

/* 子区块包装：让 Pro / Cube / Lite 在背景上视觉化分离 */
.product-region {
  padding: 120px 0;
  position: relative;
}
.product-region--matrix { background: var(--pulse-bg); }
.product-region--pro {
  background:
    radial-gradient(ellipse 800px 500px at 85% 5%, rgba(132, 100, 244, 0.16), transparent 60%),
    radial-gradient(ellipse 700px 500px at 0% 95%, rgba(193, 184, 241, 0.22), transparent 60%),
    linear-gradient(180deg, var(--pulse-bg-2) 0%, var(--pulse-bg-3) 100%);
}
.product-region--cube {
  background:
    radial-gradient(ellipse 900px 600px at 15% 10%, rgba(96, 93, 200, 0.10), transparent 60%),
    radial-gradient(ellipse 700px 500px at 95% 85%, rgba(160, 170, 220, 0.15), transparent 60%),
    linear-gradient(180deg, var(--pulse-bg-4) 0%, #E9EDF3 100%);
}
.product-region--lite {
  background:
    radial-gradient(ellipse 700px 500px at 80% 20%, rgba(241, 238, 255, 0.7), transparent 60%),
    linear-gradient(180deg, var(--pulse-bg-2) 0%, var(--pulse-bg-3) 100%);
}

/* product 头部 */
.product__header {
  display: grid;
  grid-template-columns: 1fr 1.05fr;
  gap: 64px;
  align-items: end;
  margin-bottom: 48px;
}
.product__lockup { display: flex; flex-direction: column; gap: 10px; }
.product__tiny {
  font-family: var(--font-en);
  font-weight: 500;
  font-size: 14px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--pulse-ink-3);
}
.product__tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-en);
  font-weight: 500;
  font-size: 15px;
  letter-spacing: 0.14em;
  color: #fff;
  background: var(--pulse-purple);
  padding: 6px 14px;
  border-radius: 999px;
  align-self: flex-start;
  text-transform: uppercase;
}
.product__name {
  font-family: var(--font-cn);
  font-weight: 600;
  font-size: clamp(28px, 3.4vw, 44px);
  letter-spacing: -0.02em;
  color: var(--pulse-ink);
  margin: 0;
}
.product__statement {
  font-family: var(--font-cn);
  font-weight: 300;
  font-size: clamp(22px, 2.4vw, 30px);
  line-height: 1.45;
  letter-spacing: -0.02em;
  color: var(--pulse-ink);
  margin: 0;
  text-wrap: balance;
  white-space: pre-line;
}
.product__statement em {
  font-style: normal;
  display: block;
  margin-top: 12px;
  font-size: 16px;
  letter-spacing: 0.04em;
  color: var(--pulse-purple-accessible);
  font-weight: 500;
}

/* ============================================================
   Matrix (云-边-端) — 重新设计：清晰的 label+内容对齐，去掉 chip pill
   ============================================================ */
.matrix {
  margin-top: 40px;
  display: grid;
  gap: 20px;
}
.matrix__row {
  background: rgba(255, 255, 255, 0.68);
  backdrop-filter: blur(20px) saturate(1.3);
  -webkit-backdrop-filter: blur(20px) saturate(1.3);
  border: 1px solid rgba(21, 18, 35, 0.08);
  border-radius: 20px;
  padding: 36px 40px;
  display: grid;
  grid-template-columns: minmax(220px, 280px) 1fr;
  gap: 56px;
  align-items: start;
}
.matrix__product {
  display: flex; flex-direction: column;
  gap: 8px;
  padding-right: 24px;
  border-right: 1px solid rgba(21, 18, 35, 0.08);
}
.matrix__product-tag {
  align-self: flex-start;
  display: inline-flex; align-items: center; gap: 6px;
  font-family: var(--font-en);
  font-weight: 500;
  font-size: 12px;
  letter-spacing: 0.14em;
  color: #fff;
  background: var(--pulse-purple);
  padding: 5px 12px;
  border-radius: 999px;
  text-transform: uppercase;
  margin-top: 4px;
}
.matrix__product-name {
  font-family: var(--font-cn);
  font-weight: 600;
  font-size: 22px;
  letter-spacing: -0.01em;
  color: var(--pulse-ink);
  margin-top: 4px;
}
.matrix__layer-en {
  font-family: var(--font-en);
  font-weight: 500;
  font-size: 13px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--pulse-purple-accessible);
}
.matrix__caps { display: grid; gap: 22px; }
.matrix__caps-group {
  display: grid;
  grid-template-columns: 130px 1fr;
  gap: 24px;
  align-items: baseline;
}
.matrix__caps-title {
  font-family: var(--font-cn);
  font-weight: 600;
  font-size: 15px;
  letter-spacing: 0.02em;
  color: var(--pulse-ink);
}
.matrix__caps-list {
  display: flex; flex-wrap: wrap;
  font-family: var(--font-cn);
  font-size: 15px;
  font-weight: 400;
  color: var(--pulse-ink-2);
  line-height: 1.6;
}
.matrix__caps-list span {
  position: relative;
  padding: 0 14px;
}
.matrix__caps-list span:first-child { padding-left: 0; }
.matrix__caps-list span + span::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 3px; height: 3px;
  border-radius: 50%;
  background: rgba(21, 18, 35, 0.22);
}

/* ============================================================
   Pulse Pro (PPT p.8–11)
   ============================================================ */

/* 五个能力点 */
.pp-caps {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 16px;
  margin-top: 32px;
}
.pp-cap {
  background: rgba(255, 255, 255, 0.7);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid rgba(21, 18, 35, 0.08);
  border-radius: 16px;
  padding: 24px 22px;
  display: flex; flex-direction: column; gap: 6px;
  transition: transform 320ms var(--ease), border-color 320ms var(--ease);
}
.pp-cap:hover { transform: translateY(-3px); border-color: var(--pulse-purple); }
.pp-cap__title {
  font-family: var(--font-cn);
  font-weight: 600;
  font-size: 17px;
  letter-spacing: -0.01em;
  color: var(--pulse-ink);
}
.pp-cap__sub {
  font-family: var(--font-cn);
  font-weight: 400;
  font-size: 14px;
  color: var(--pulse-ink-2);
}

/* 占位框 */
.placeholder {
  border: 1.5px dashed rgba(21, 18, 35, 0.18);
  background: rgba(255, 255, 255, 0.5);
  padding: 64px 32px;
  text-align: center;
  display: flex; flex-direction: column;
  align-items: center; justify-content: center;
  gap: 6px;
  color: var(--pulse-ink-2);
  font-family: var(--font-cn);
  border-radius: 20px;
}
.placeholder__head {
  font-family: var(--font-en);
  font-weight: 500;
  font-size: 14px;
  letter-spacing: 0.22em;
  color: var(--pulse-purple-accessible);
  text-transform: uppercase;
  margin-bottom: 6px;
}
.placeholder__desc {
  font-size: 16px;
  color: var(--pulse-ink);
  font-weight: 500;
}
.placeholder__size {
  font-family: var(--font-en);
  font-size: 14px;
  letter-spacing: 0.06em;
  color: var(--pulse-ink-2);
  margin-top: 4px;
}
.placeholder--hero { min-height: 480px; }
.placeholder--mobile {
  width: 280px;
  min-height: 480px;
  margin: 0 auto;
  border-radius: 28px;
}

/* Pulse Pro 主仪表盘截图 */
.pp-overview {
  margin-top: 48px;
}
.pp-overview img {
  width: 100%; height: auto;
  display: block;
  border-radius: 20px;
}

/* ============================================================
   四大核心产品力 — 精简版
   ============================================================ */
.pp-pillars {
  margin-top: 48px;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}
.pillar {
  position: relative;
  background: rgba(255, 255, 255, 0.72);
  backdrop-filter: blur(20px) saturate(1.3);
  -webkit-backdrop-filter: blur(20px) saturate(1.3);
  border: 1px solid rgba(21, 18, 35, 0.08);
  border-radius: 18px;
  padding: 24px 22px 22px;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  gap: 14px;
  transition: transform 320ms var(--ease), border-color 320ms var(--ease), box-shadow 320ms var(--ease);
}
.pillar::before {
  content: "";
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 3px;
  background: linear-gradient(90deg, var(--pulse-purple) 0%, var(--pulse-purple-hot) 100%);
}
.pillar__index {
  font-family: var(--font-en);
  font-weight: 600;
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--pulse-purple-accessible);
}
.pillar:hover {
  transform: translateY(-3px);
  border-color: rgba(132, 100, 244, 0.3);
  box-shadow: 0 16px 32px rgba(132, 100, 244, 0.10);
}
.pillar__head {
  display: flex; flex-direction: column; gap: 4px;
  padding-bottom: 14px;
  border-bottom: 1px solid rgba(21, 18, 35, 0.08);
}
.pillar__title {
  font-family: var(--font-cn);
  font-weight: 600;
  font-size: 18px;
  letter-spacing: -0.01em;
  color: var(--pulse-ink);
  margin: 0;
}
.pillar__sub {
  font-family: var(--font-cn);
  font-weight: 400;
  font-size: 13px;
  color: var(--pulse-ink-2);
}
.pillar__hero {
  display: flex; flex-direction: column;
  gap: 4px;
}
.pillar__hero-num {
  font-family: var(--font-en);
  font-weight: 300;
  font-size: 32px;
  letter-spacing: -0.03em;
  color: var(--pulse-purple-deep);
  line-height: 1;
}
.pillar__hero-label {
  font-family: var(--font-cn);
  font-size: 13px;
  font-weight: 500;
  color: var(--pulse-ink-2);
  line-height: 1.4;
}
.pillar__sec {
  display: grid;
  gap: 8px;
  padding-top: 12px;
  border-top: 1px solid rgba(21, 18, 35, 0.06);
  margin-top: auto;
}
.pillar__sec-item {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 10px;
  font-family: var(--font-cn);
}
.pillar__sec-item .lbl {
  font-size: 13px;
  color: var(--pulse-ink-2);
  font-weight: 400;
}
.pillar__sec-item .val {
  font-family: var(--font-en);
  font-weight: 500;
  font-size: 15px;
  color: var(--pulse-ink);
  letter-spacing: -0.01em;
}
.pillar__sec-item .val .arrow-up   { color: #C2410C; margin-right: 3px; font-size: 11px; }
.pillar__sec-item .val .arrow-down { color: #2E7D32; margin-right: 3px; font-size: 11px; }
.pillar__channels {
  padding-top: 12px;
  border-top: 1px solid rgba(21, 18, 35, 0.06);
  display: grid;
  gap: 6px;
  margin-top: auto;
}
.pillar__channels-item {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-cn);
  font-size: 13px;
  color: var(--pulse-ink);
  font-weight: 500;
}
.pillar__channels-item::before {
  content: counter(channel);
  counter-increment: channel;
  font-family: var(--font-en);
  font-weight: 500;
  font-size: 11px;
  width: 18px; height: 18px;
  display: inline-grid; place-items: center;
  border-radius: 50%;
  background: var(--pulse-purple);
  color: #fff;
  flex: 0 0 auto;
}
.pillar__channels { counter-reset: channel; }

/* ============================================================
   Pulse Lite — 手机 mockup
   ============================================================ */
.lite-mockup {
  width: 100%;
  max-width: 300px;
  margin: 0 auto;
  border-radius: 32px;
  overflow: hidden;
  box-shadow:
    0 24px 48px rgba(21, 18, 35, 0.18),
    0 4px 12px rgba(132, 100, 244, 0.08);
  border: 1px solid rgba(21, 18, 35, 0.08);
  background: #fff;
}
.lite-mockup img {
  width: 100%;
  height: auto;
  display: block;
}

/* Pulse Pro 两个子能力块 */
.pp-blocks {
  margin-top: 96px;
  display: grid;
  gap: 56px;
}
.pp-block {
  display: grid;
  grid-template-columns: 1fr 1.1fr;
  gap: 56px;
  align-items: center;
}
.pp-block:nth-child(even) { grid-template-columns: 1.1fr 1fr; }
.pp-block:nth-child(even) .pp-block__media { order: -1; }
.pp-block__title {
  font-family: var(--font-cn);
  font-weight: 600;
  font-size: clamp(22px, 2.4vw, 30px);
  letter-spacing: -0.02em;
  color: var(--pulse-ink);
  margin: 0 0 12px;
}
.pp-block__sub {
  font-family: var(--font-cn);
  font-weight: 400;
  font-size: 16px;
  line-height: 1.7;
  color: var(--pulse-ink-2);
  margin: 0;
}
.pp-block__media {
  background: linear-gradient(160deg, #0A0820 0%, #14102C 100%);
  border: 1px solid rgba(21, 18, 35, 0.08);
  padding: 16px;
  border-radius: 20px;
  overflow: hidden;
}
.pp-block__media img {
  width: 100%; height: auto; display: block;
  border-radius: 12px;
}

/* ============================================================
   功能全景 (PPT p.13) — Pulse Pro vs Pulse Lite 功能矩阵
   新 UX：默认部分展示 + 渐变遮罩 + 底部 CTA
   ============================================================ */
.feature-pano {
  margin-top: 96px;
  background: rgba(255, 255, 255, 0.62);
  backdrop-filter: blur(20px) saturate(1.4);
  -webkit-backdrop-filter: blur(20px) saturate(1.4);
  border: 1px solid rgba(21, 18, 35, 0.08);
  border-radius: 24px;
  padding: 36px 40px 8px;
}
.feature-pano__head {
  text-align: center;
  margin-bottom: 28px;
}
.feature-pano__head .section__eyebrow { margin-bottom: 10px; }
.feature-pano__title {
  font-family: var(--font-cn);
  font-weight: 300;
  font-size: clamp(24px, 3vw, 36px);
  letter-spacing: -0.02em;
  color: var(--pulse-ink);
  margin: 0;
}
.feature-pano__sub {
  font-family: var(--font-cn);
  font-size: 16px;
  font-weight: 400;
  color: var(--pulse-ink-2);
  margin: 10px auto 0;
  max-width: 60ch;
}

/* viewport — 折叠时限制高度 + 底部渐变 fade overlay */
.feature-pano__viewport {
  position: relative;
  max-height: 560px;
  overflow: hidden;
  transition: max-height 600ms cubic-bezier(0.16, 1, 0.3, 1);
}
.feature-pano.is-open .feature-pano__viewport {
  max-height: 4000px;
}
.feature-pano__fade {
  position: absolute;
  left: 0; right: 0;
  bottom: 0;
  height: 220px;
  background: linear-gradient(
    to bottom,
    rgba(252, 251, 255, 0) 0%,
    rgba(252, 251, 255, 0.88) 55%,
    rgba(252, 251, 255, 1) 100%
  );
  pointer-events: none;
  transition: opacity 320ms ease;
  z-index: 1;
}
.feature-pano.is-open .feature-pano__fade { opacity: 0; }

/* CTA — 折叠时浮于 fade 之上；展开时正常流 */
.feature-pano__action {
  position: relative;
  z-index: 2;
  display: flex;
  justify-content: center;
  margin-top: -88px;          /* 折叠时上拉，覆盖在 fade 上 */
  padding-bottom: 28px;
  transition: margin-top 360ms cubic-bezier(0.16, 1, 0.3, 1);
}
.feature-pano.is-open .feature-pano__action {
  margin-top: 24px;
}
.feature-pano__cta {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 14px 26px;
  border-radius: 999px;
  border: 1px solid var(--pulse-purple);
  background: var(--pulse-purple);
  font-family: var(--font-cn);
  font-size: 15px;
  font-weight: 500;
  color: #fff;
  cursor: pointer;
  box-shadow: 0 12px 32px rgba(132, 100, 244, 0.28);
  transition: background var(--dur) var(--ease),
              border-color var(--dur) var(--ease),
              transform var(--dur) var(--ease),
              box-shadow var(--dur) var(--ease);
}
.feature-pano__cta:hover {
  background: var(--pulse-purple-hot);
  border-color: var(--pulse-purple-hot);
  transform: translateY(-2px);
  box-shadow: 0 16px 40px rgba(132, 100, 244, 0.36);
}
.feature-pano__cta .icon {
  width: 10px; height: 10px;
  border-right: 1.5px solid currentColor;
  border-bottom: 1.5px solid currentColor;
  transform: rotate(45deg) translate(-2px, -2px);
  transition: transform var(--dur) var(--ease);
}
.feature-pano.is-open .feature-pano__cta .icon {
  transform: rotate(-135deg) translate(-2px, -2px);
}

.feature-pano__grid {
  display: grid;
  grid-template-columns: 5fr 1.6fr;
  gap: 24px;
}
.fp-card {
  border-radius: 20px;
  padding: 28px 28px 24px;
  position: relative;
}
.fp-card--pro {
  background: linear-gradient(180deg, rgba(241, 238, 255, 0.7) 0%, rgba(255,255,255,0.85) 100%);
  border: 1px solid rgba(132, 100, 244, 0.18);
}
.fp-card--lite {
  background: linear-gradient(180deg, rgba(241, 238, 255, 0.6) 0%, rgba(255,255,255,0.85) 100%);
  border: 1px solid rgba(132, 100, 244, 0.18);
}
.fp-card__badge {
  display: inline-flex; align-items: center; gap: 8px;
  background: var(--pulse-purple);
  color: #fff;
  padding: 8px 16px;
  border-radius: 999px;
  font-family: var(--font-en);
  font-weight: 500;
  font-size: 15px;
  letter-spacing: 0.06em;
}
.fp-card__badge::before {
  content: "+"; font-weight: 400; opacity: 0.8;
}
.fp-card__plat {
  text-align: center;
  font-family: var(--font-cn);
  font-weight: 600;
  font-size: 22px;
  margin: 24px 0 28px;
  color: var(--pulse-ink);
}
.fp-card--lite .fp-card__plat { margin-top: 24px; }
.fp-card__cols {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 24px;
}
.fp-card--lite .fp-card__cols { grid-template-columns: 1fr; }
.fp-col__title {
  font-family: var(--font-cn);
  font-weight: 600;
  font-size: 18px;
  text-align: center;
  color: var(--pulse-ink);
  margin: 0 0 18px;
  padding-bottom: 14px;
  border-bottom: 1px solid rgba(132, 100, 244, 0.18);
}
.fp-group { margin-bottom: 20px; }
.fp-group__title {
  font-family: var(--font-cn);
  font-weight: 600;
  font-size: 15px;
  color: var(--pulse-ink);
  margin-bottom: 8px;
}
.fp-group ul {
  list-style: none;
  margin: 0; padding: 0;
  display: grid; gap: 6px;
}
.fp-group li {
  font-family: var(--font-cn);
  font-size: 14px;
  color: var(--pulse-ink);
  font-weight: 400;
  display: flex; align-items: baseline; gap: 8px;
}
.fp-group li::before {
  content: "✓";
  color: var(--pulse-purple-accessible);
  font-weight: 600;
  font-size: 13px;
  flex: 0 0 auto;
}

/* ============================================================
   Pulse Cube
   ============================================================ */
.cube-hero {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
  align-items: center;
  margin-top: 40px;
}
.cube-hero__image {
  display: block;
}
.cube-hero__image img { width: 100%; height: auto; object-fit: contain; border-radius: 20px; }
.cube-caps {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}
.cube-cap {
  padding: 20px;
  border: 1px solid rgba(21, 18, 35, 0.08);
  background: rgba(255,255,255,0.7);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-radius: 16px;
  display: flex; flex-direction: column; gap: 6px;
}
.cube-cap__title {
  font-family: var(--font-cn);
  font-weight: 600;
  font-size: 16px;
  letter-spacing: -0.01em;
  color: var(--pulse-ink);
}
.cube-cap__sub {
  font-family: var(--font-cn);
  font-size: 14px;
  color: var(--pulse-ink-2);
}
.cube-cap--wide { grid-column: span 2; }
.cube-cap--purple {
  grid-column: span 2;
  background: linear-gradient(135deg, var(--pulse-ink) 0%, #14102C 100%);
  color: #fff;
  border: 1px solid transparent;
  padding: 22px;
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 18px;
  align-items: center;
}
.cube-cap--purple .one-for-all {
  font-family: var(--font-en);
  font-weight: 500;
  font-size: 20px;
  letter-spacing: 0.16em;
  color: var(--pulse-purple-300);
}
.cube-cap--purple .one-for-all-cn {
  font-family: var(--font-cn);
  font-weight: 600;
  font-size: 17px;
  letter-spacing: -0.01em;
  color: #fff;
}
.cube-cap--purple small {
  font-family: var(--font-cn);
  font-size: 14px;
  color: rgba(255,255,255,0.78);
  display: block; margin-top: 4px;
}

/* 三型号 — 左图右字，参数 collapse */
.cube-models {
  margin-top: 96px;
  display: grid;
  gap: 20px;
}
.cube-model {
  background: rgba(255,255,255,0.7);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid rgba(21, 18, 35, 0.08);
  border-radius: 24px;
  padding: 28px;
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 32px;
  align-items: center;
  transition: border-color 320ms var(--ease), box-shadow 320ms var(--ease);
}
.cube-model:hover {
  border-color: rgba(132, 100, 244, 0.3);
  box-shadow: 0 16px 40px rgba(21, 18, 35, 0.06);
}
.cube-model__image {
  background: linear-gradient(160deg, #FFFFFF 0%, #EEF2F7 100%);
  padding: 24px;
  border-radius: 16px;
  aspect-ratio: 1 / 1;
  display: grid; place-items: center;
  border: 1px solid rgba(21, 18, 35, 0.06);
}
.cube-model__image img { max-height: 100%; max-width: 100%; object-fit: contain; }
.cube-model__body { display: flex; flex-direction: column; gap: 6px; }
.cube-model__row {
  display: flex; align-items: center; gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 4px;
}
.cube-model__level {
  font-family: var(--font-cn);
  font-weight: 600;
  font-size: 13px;
  letter-spacing: 0.05em;
  color: #fff;
  background: var(--pulse-purple);
  padding: 4px 12px;
  border-radius: 999px;
}
.cube-model__name {
  font-family: var(--font-cn);
  font-weight: 600;
  font-size: 28px;
  letter-spacing: -0.01em;
  color: var(--pulse-ink);
  margin: 0;
}
.cube-model__sub {
  font-family: var(--font-en);
  font-weight: 500;
  font-size: 15px;
  letter-spacing: 0.06em;
  color: var(--pulse-ink-2);
}
.cube-model__sub-cn {
  font-family: var(--font-cn);
  font-size: 14px;
  color: var(--pulse-ink-2);
}
.cube-model__expand {
  align-self: flex-start;
  margin-top: 14px;
  display: inline-flex; align-items: center; gap: 10px;
  padding: 10px 18px;
  background: transparent;
  border: 1px solid rgba(21, 18, 35, 0.16);
  border-radius: 999px;
  font-family: var(--font-cn);
  font-size: 14px;
  font-weight: 500;
  color: var(--pulse-ink);
  cursor: pointer;
  transition: all var(--dur) var(--ease);
}
.cube-model__expand:hover {
  background: var(--pulse-purple);
  border-color: var(--pulse-purple);
  color: #fff;
}
.cube-model__expand .icon {
  width: 9px; height: 9px;
  border-right: 1.5px solid currentColor;
  border-bottom: 1.5px solid currentColor;
  transform: rotate(45deg) translate(-2px, -2px);
  transition: transform var(--dur) var(--ease);
}
.cube-model.is-open .cube-model__expand .icon {
  transform: rotate(-135deg) translate(-2px, -2px);
}
.cube-model__specs {
  grid-column: span 2;
  list-style: none; margin: 0; padding: 0;
  max-height: 0;
  overflow: hidden;
  display: grid;
  transition: max-height 480ms var(--ease), padding 320ms var(--ease), opacity 320ms var(--ease);
  opacity: 0;
}
.cube-model.is-open .cube-model__specs {
  max-height: 800px;
  padding-top: 24px;
  margin-top: 8px;
  border-top: 1px solid rgba(21, 18, 35, 0.08);
  grid-template-columns: 1fr 1fr;
  gap: 12px 32px;
  opacity: 1;
}
.cube-model__specs li {
  display: grid;
  grid-template-columns: 110px 1fr;
  gap: 16px;
  font-family: var(--font-cn);
  font-size: 14px;
  line-height: 1.6;
  padding-bottom: 12px;
  border-bottom: 1px solid rgba(21, 18, 35, 0.05);
}
.cube-model__specs li > span:first-child {
  color: var(--pulse-ink-3);
  font-weight: 500;
}
.cube-model__specs li > span:last-child { color: var(--pulse-ink); }

/* 竞品对比表 */
.compare {
  margin-top: 96px;
  border: 1px solid rgba(21, 18, 35, 0.08);
  background: rgba(255,255,255,0.7);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-radius: 24px;
  overflow: hidden;
}
.compare__head {
  display: grid;
  grid-template-columns: 220px 1fr 1fr;
  border-bottom: 1px solid rgba(21, 18, 35, 0.08);
}
.compare__head > div {
  padding: 20px 28px;
  font-family: var(--font-cn);
  font-weight: 600;
  font-size: 16px;
  letter-spacing: -0.01em;
}
.compare__head > div:first-child {
  color: var(--pulse-ink-2);
  font-weight: 500;
  font-size: 14px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  font-family: var(--font-en);
}
.compare__head > .compare__head-pulse {
  color: #fff;
  background: linear-gradient(135deg, var(--pulse-purple) 0%, var(--pulse-purple-hot) 100%);
  display: flex; align-items: center; gap: 12px;
}
.compare__head > .compare__head-pulse small {
  font-family: var(--font-en);
  font-weight: 500;
  font-size: 13px;
  letter-spacing: 0.08em;
  color: rgba(255,255,255,0.86);
}
.compare__head > .compare__head-other {
  color: var(--pulse-ink);
}
.compare__head > .compare__head-other small {
  font-family: var(--font-en);
  font-weight: 500;
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--pulse-ink-3);
  display: block; margin-top: 2px;
}
.compare__row {
  display: grid;
  grid-template-columns: 220px 1fr 1fr;
  border-top: 1px solid rgba(21, 18, 35, 0.06);
}
.compare__row:first-child { border-top: 0; }
.compare__row > div {
  padding: 18px 28px;
  font-family: var(--font-cn);
  font-size: 15px;
  line-height: 1.6;
  color: var(--pulse-ink);
}
.compare__row > div:first-child {
  color: var(--pulse-ink-2);
  font-size: 14px;
  font-weight: 500;
  background: rgba(21,18,35,0.025);
}
.compare__row .pulse-cell { color: var(--pulse-ink); font-weight: 500; }
.compare__row .other-cell { color: var(--pulse-ink-2); }

/* ============================================================
   Pulse Lite
   ============================================================ */
.lite-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 64px;
  align-items: start;
}
.lite-feats {
  list-style: none;
  margin: 32px 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
}
.lite-feats li {
  background: rgba(255,255,255,0.7);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid rgba(21, 18, 35, 0.08);
  border-radius: 16px;
  padding: 20px 24px;
  display: grid;
  grid-template-columns: 36px 1fr 1.2fr;
  align-items: baseline;
  gap: 20px;
  transition: border-color 320ms var(--ease), transform 320ms var(--ease);
}
.lite-feats li:hover {
  transform: translateX(4px);
  border-color: rgba(132, 100, 244, 0.3);
}
.lite-feats li > .num {
  font-family: var(--font-en);
  font-weight: 600;
  font-size: 14px;
  color: var(--pulse-purple-accessible);
  letter-spacing: 0.08em;
}
.lite-feats li > .name {
  font-family: var(--font-cn);
  font-weight: 600;
  font-size: 16px;
  color: var(--pulse-ink);
}
.lite-feats li > .desc {
  font-family: var(--font-cn);
  font-size: 14px;
  color: var(--pulse-ink-2);
}

/* ============================================================
   Cases (10+年行业标杆)
   ============================================================ */
.section--cases { background: var(--pulse-bg); }
.cases {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.case {
  background: rgba(255,255,255,0.7);
  backdrop-filter: blur(16px) saturate(1.3);
  -webkit-backdrop-filter: blur(16px) saturate(1.3);
  border: 1px solid rgba(21, 18, 35, 0.08);
  border-radius: 20px;
  padding: 28px 26px;
  display: flex; flex-direction: column; gap: 16px;
  min-height: 260px;
  transition:
    transform 420ms cubic-bezier(0.16, 1, 0.3, 1),
    box-shadow 420ms cubic-bezier(0.16, 1, 0.3, 1),
    border-color 420ms cubic-bezier(0.16, 1, 0.3, 1),
    background 420ms cubic-bezier(0.16, 1, 0.3, 1);
  position: relative;
  will-change: transform;
}
.case:hover {
  transform: translateY(-6px);
  background: #fff;
  border-color: rgba(132, 100, 244, 0.25);
  box-shadow:
    0 24px 48px rgba(21, 18, 35, 0.08),
    0 4px 12px rgba(132, 100, 244, 0.08);
  z-index: 1;
}
.case__chip {
  width: 10px; height: 10px;
  background: var(--pulse-purple);
  border-radius: 3px;
}
.case__year {
  font-family: var(--font-en);
  font-weight: 600;
  font-size: 15px;
  letter-spacing: 0.1em;
  color: var(--pulse-purple-accessible);
}
.case__tag {
  font-family: var(--font-cn);
  font-size: 14px;
  font-weight: 500;
  color: var(--pulse-ink-2);
  letter-spacing: 0.02em;
}
.case__head { display: flex; align-items: center; gap: 12px; }
.case__client {
  font-family: var(--font-cn);
  font-weight: 600;
  font-size: 18px;
  letter-spacing: -0.01em;
  color: var(--pulse-ink);
  margin: 0;
  line-height: 1.4;
}
.case__client em {
  font-style: normal;
  display: block;
  font-weight: 400;
  font-size: 15px;
  color: var(--pulse-ink-2);
  margin-top: 4px;
}
.case__body {
  font-family: var(--font-cn);
  font-size: 14px;
  line-height: 1.7;
  color: var(--pulse-ink);
  margin: 0;
  margin-top: auto;
}

/* ============================================================
   About (现在位于 cases 之后)
   ============================================================ */
.section--about {
  background:
    radial-gradient(ellipse 800px 500px at 0% 0%, rgba(132, 100, 244, 0.08), transparent 60%),
    var(--pulse-bg);
}
.about__grid {
  display: grid;
  grid-template-columns: 1fr 1.3fr;
  gap: 96px;
  align-items: start;
}
.mvv { display: grid; gap: 32px; }
.mvv__item {
  background: rgba(255,255,255,0.7);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid rgba(21, 18, 35, 0.08);
  border-radius: 20px;
  padding: 28px 28px;
}
.mvv__label {
  display: flex; align-items: baseline; gap: 12px;
  margin-bottom: 12px;
}
.mvv__cn {
  font-family: var(--font-cn);
  font-weight: 600;
  font-size: 18px;
  letter-spacing: -0.01em;
  color: var(--pulse-ink);
}
.mvv__en {
  font-family: var(--font-en);
  font-weight: 500;
  font-size: 14px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--pulse-purple-accessible);
}
.mvv__value {
  font-family: var(--font-cn);
  font-weight: 300;
  font-size: 26px;
  line-height: 1.4;
  letter-spacing: -0.02em;
  color: var(--pulse-ink);
}
.about__copy p {
  font-family: var(--font-cn);
  font-weight: 400;
  font-size: 17px;
  line-height: 1.85;
  color: var(--pulse-ink);
  margin: 0 0 24px;
  text-wrap: pretty;
}
.about__copy p:first-child {
  font-weight: 500;
  font-size: 22px;
  color: var(--pulse-ink);
  line-height: 1.7;
}

/* ============================================================
   Contact (info + QR)
   ============================================================ */
.section--contact {
  background: var(--pulse-black);
  color: #fff;
  position: relative;
  overflow: hidden;
}
.section--contact .section__bg {
  position: absolute; inset: 0;
  background: var(--pulse-gradient-base);
  opacity: 0.7;
  z-index: 0;
}
.section--contact .section__bg::after {
  content: ""; position: absolute; inset: 0;
  background: var(--pulse-gradient-overlay);
  mix-blend-mode: lighten;
}
.section--contact > .container { position: relative; z-index: 1; }
.section--contact .section__title { color: #fff; }
.section--contact .section__subtitle { color: rgba(255,255,255,0.86); }

.contact {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 80px;
  align-items: start;
}
.contact__info { display: flex; flex-direction: column; gap: 28px; }
.contact__company {
  font-family: var(--font-cn);
  font-weight: 600;
  font-size: 28px;
  letter-spacing: -0.01em;
  color: #fff;
  margin: 0;
}
.contact__list {
  list-style: none; margin: 0; padding: 0;
  display: grid; gap: 20px;
}
.contact__list li {
  display: grid;
  grid-template-columns: 110px 1fr;
  align-items: baseline;
  gap: 24px;
  padding-bottom: 20px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.22);
  font-family: var(--font-cn);
}
.contact__list li:last-child { border-bottom: 0; }
.contact__list .k {
  font-family: var(--font-en);
  font-weight: 500;
  font-size: 14px;
  letter-spacing: 0.18em;
  color: rgba(255,255,255,0.92);    /* 提升对比度 */
  text-transform: uppercase;
}
.contact__list .v {
  font-family: var(--font-cn);
  font-size: 17px;
  font-weight: 400;
  line-height: 1.6;
  color: #fff;
}
.contact__list a.v:hover { color: var(--pulse-purple-300); }
.contact__slogan {
  margin-top: 20px;
  font-family: var(--font-cn);
  font-weight: 300;
  font-size: clamp(24px, 2.8vw, 36px);
  line-height: 1.4;
  letter-spacing: -0.02em;
  color: #fff;
}

/* QR */
.contact__qr {
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.18);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-radius: 24px;
  padding: 32px;
  display: flex; flex-direction: column; align-items: center; gap: 18px;
}
.contact__qr-img {
  background: #fff;
  border-radius: 16px;
  padding: 16px;
  width: 220px;
}
.contact__qr-img img { width: 100%; height: auto; display: block; }
.contact__qr-label {
  text-align: center;
  font-family: var(--font-cn);
  font-weight: 500;
  font-size: 15px;
  color: #fff;
}
.contact__qr-sub {
  text-align: center;
  font-family: var(--font-en);
  font-size: 13px;
  letter-spacing: 0.18em;
  color: rgba(255,255,255,0.78);
  text-transform: uppercase;
}

/* ============================================================
   Footer
   ============================================================ */
.footer {
  background: #06050B;
  color: rgba(255,255,255,0.78);
  padding: 32px 0;
  font-family: var(--font-cn);
  font-size: 14px;
}
.footer__inner {
  display: flex; align-items: center; justify-content: center;
}

/* ============================================================
   响应式
   ============================================================ */
@media (max-width: 1199px) {
  .container, .nav__inner, .hero__inner { padding: 0 40px; }
  .product-region { padding: 96px 0; }
  .section { padding: 96px 0; }

  .about__grid { grid-template-columns: 1fr; gap: 56px; }
  .advantages { grid-template-columns: repeat(2, 1fr); }
  .matrix__row { grid-template-columns: 1fr; gap: 28px; padding: 28px 32px; }
  .matrix__product { border-right: 0; padding-right: 0; padding-bottom: 20px; border-bottom: 1px solid rgba(21,18,35,0.08); }
  .matrix__caps-group { grid-template-columns: 110px 1fr; gap: 16px; }
  .pp-caps { grid-template-columns: repeat(2, 1fr); }
  .pp-pillars { grid-template-columns: repeat(2, 1fr); }
  .cube-hero { grid-template-columns: 1fr; gap: 32px; }
  .feature-pano__grid { grid-template-columns: 1fr; }
  .fp-card__cols { grid-template-columns: repeat(2, 1fr); }
  .lite-grid { grid-template-columns: 1fr; gap: 40px; }
  .cases { grid-template-columns: repeat(2, 1fr); }
  .contact { grid-template-columns: 1fr; gap: 56px; }
  .contact__qr { max-width: 360px; margin: 0; }
  .product__header { grid-template-columns: 1fr; gap: 32px; }
}

@media (max-width: 767px) {
  .container, .nav__inner, .hero__inner { padding: 0 20px; }
  .nav { height: 64px; }
  .nav__links {
    position: fixed;
    top: 64px; left: 0; right: 0;
    background: rgba(255,255,255,0.98);
    backdrop-filter: blur(24px) saturate(1.4);
    -webkit-backdrop-filter: blur(24px) saturate(1.4);
    flex-direction: column;
    gap: 0;
    padding: 16px 0;
    border-bottom: 1px solid rgba(21,18,35,0.08);
    transform: translateY(-12px);
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--dur) var(--ease), transform var(--dur) var(--ease);
    align-items: stretch;
  }
  .nav__links.is-open { transform: translateY(0); opacity: 1; pointer-events: auto; }
  .nav__links > li { padding: 0 20px; }
  .nav__links a, .nav__links .nav__btn {
    padding: 16px 0;
    width: 100%;
    color: var(--pulse-ink);
    border-bottom: 1px solid rgba(21,18,35,0.06);
    font-size: 16px;
  }
  .nav__links .nav__btn { justify-content: space-between; }
  .nav__links a.is-active::after, .nav__links .nav__btn.is-active::after { display: none; }
  .nav__links a.is-active, .nav__links .nav__btn.is-active { color: var(--pulse-purple); }

  /* dropdown 移动端 — inline */
  .nav__dropdown {
    position: static;
    transform: none;
    opacity: 1;
    pointer-events: auto;
    background: transparent;
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
    border: 0;
    box-shadow: none;
    padding: 0;
    min-width: 0;
    max-height: 0;
    overflow: hidden;
    transition: max-height 320ms var(--ease);
  }
  .nav__item--has-dropdown:hover .nav__dropdown,
  .nav__item--open .nav__dropdown { max-height: 200px; padding: 4px 0 12px; transform: none; }
  .nav__dropdown a {
    padding: 12px 20px 12px 32px;
    border-bottom: 0;
    font-size: 15px;
  }
  .nav__dropdown a small {
    font-size: 11px;
    margin-bottom: 2px;
  }

  .nav__toggle { display: flex; }
  .nav:not(.is-scrolled) { color: #fff; }

  .hero { padding: 110px 0 140px; min-height: auto; }
  .hero__title { font-size: clamp(34px, 9vw, 56px); max-width: none; }
  .hero__subtitle { font-size: 18px; }
  .section { padding: 72px 0; }
  .product-region { padding: 72px 0; }
  .section__head { margin-bottom: 40px; }

  .advantages { grid-template-columns: 1fr; gap: 14px; }
  .advantage { min-height: auto; padding: 28px 24px; }
  .matrix__row { padding: 24px; }
  .matrix__caps-group { grid-template-columns: 1fr; gap: 6px; }
  .pp-caps { grid-template-columns: 1fr; gap: 12px; }
  .pp-pillars { grid-template-columns: 1fr; gap: 12px; }
  .pillar { padding: 22px 22px 20px; }

  .feature-pano { padding: 24px; }
  .fp-card__cols { grid-template-columns: 1fr; gap: 14px; }
  .fp-card { padding: 24px 20px; }

  .cube-hero { gap: 24px; }
  .cube-hero__image { padding: 0; }
  .cube-caps { grid-template-columns: 1fr; }
  .cube-cap--wide { grid-column: auto; }
  .cube-cap--purple { grid-column: auto; grid-template-columns: 1fr; gap: 12px; text-align: center; justify-items: center; }

  .compare__head, .compare__row { grid-template-columns: 1fr; }
  .compare__head > div, .compare__row > div { padding: 14px 20px; }
  .compare__row > div:first-child {
    font-size: 13px;
    padding-top: 18px;
    padding-bottom: 4px;
    background: rgba(21,18,35,0.04);
  }

  .lite-feats li {
    grid-template-columns: 32px 1fr;
    gap: 8px 16px;
    padding: 16px 20px;
  }
  .lite-feats li > .desc { grid-column: 2; }

  .cases { grid-template-columns: 1fr; }
  .case { min-height: auto; padding: 24px; }

  .about__grid { gap: 40px; }
  .mvv { gap: 16px; }
  .mvv__item { padding: 22px; }
  .mvv__value { font-size: 22px; }
  .about__copy p:first-child { font-size: 18px; }

  .contact { gap: 40px; }
  .contact__list li { grid-template-columns: 1fr; gap: 6px; padding-bottom: 16px; }
  .contact__qr-img { width: 180px; }
}