/* ============================================================
   Sheenova 汐星札记 — 深空星潮 · 玻璃拟态版
   现代渐变 / 玻璃拟态 / 流动光晕动态背景 / 深色一致
   ============================================================ */

:root {
  --bg: #04060F;
  --bg-2: #070C22;
  --ink: #EAEFFD;
  --ink-2: #A9B4D4;
  --ink-3: #6A76A0;
  --primary: #5B86FF;
  --aqua: #6FE3E8;
  --violet: #BB8CFF;
  /* 玻璃拟态材质 */
  --glass-bg: rgba(255, 255, 255, .045);
  --glass-bg-2: rgba(255, 255, 255, .08);
  --glass-brd: rgba(255, 255, 255, .1);
  --glass-brd-2: rgba(255, 255, 255, .18);
  --glass-hi: rgba(255, 255, 255, .09);   /* 顶部高光线 */
  --hairline: rgba(146, 168, 255, .12);
  --hairline-strong: rgba(146, 168, 255, .22);
  /* 渐变 */
  --grad-tide: linear-gradient(90deg, #5B86FF 0%, #6FE3E8 50%, #BB8CFF 100%);
  --grad-btn: linear-gradient(135deg, #5B86FF 0%, #6FE3E8 100%);
  --grad-bg: linear-gradient(180deg, #06081A 0%, #080C22 42%, #060918 100%);
  --serif: "Noto Serif SC", "Songti SC", "STSong", serif;
  --sans: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --disp: "Space Grotesk", "Noto Sans SC", sans-serif;
  --ease: cubic-bezier(.22, .61, .36, 1);
  --radius: 18px;
  --nav-h: 72px;
}

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

html { scroll-behavior: smooth; overflow-x: hidden; }

body {
  background: var(--bg);
  background: var(--grad-bg);
  background-attachment: fixed;
  color: var(--ink);
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

p { text-wrap: pretty; }
h1, h2, h3 { text-wrap: balance; }
a { color: inherit; text-decoration: none; }

::selection { background: rgba(91, 134, 255, .4); color: #fff; }

::-webkit-scrollbar { width: 10px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: rgba(146, 168, 255, .2); border-radius: 6px; }
::-webkit-scrollbar-thumb:hover { background: rgba(146, 168, 255, .36); }

.container {
  width: min(1200px, 100% - 48px);
  margin-inline: auto;
}

section { scroll-margin-top: calc(var(--nav-h) + 16px); }

/* ============================================================
   动态背景层：流动渐变光晕 + 星空 + 鼠标光晕
   ============================================================ */
/* 流动渐变光晕（aurora blob） */
.aurora {
  position: fixed;
  inset: 0;
  z-index: -3;
  overflow: hidden;
  pointer-events: none;
}
.aurora .blob {
  position: absolute;
  border-radius: 50%;
  filter: blur(90px);
  -webkit-filter: blur(90px);
  will-change: transform;
  pointer-events: none;
}
.blob-1 {
  width: 62vmax; height: 62vmax;
  top: -22%; left: -14%;
  background: radial-gradient(circle at 40% 40%, rgba(78, 124, 255, .34), transparent 62%);
  animation: drift1 34s ease-in-out infinite;
}
.blob-2 {
  width: 50vmax; height: 50vmax;
  top: 30%; right: -18%;
  background: radial-gradient(circle at 50% 50%, rgba(94, 232, 224, .26), transparent 60%);
  animation: drift2 42s ease-in-out infinite;
}
.blob-3 {
  width: 55vmax; height: 55vmax;
  bottom: -24%; left: 22%;
  background: radial-gradient(circle at 50% 50%, rgba(167, 139, 250, .24), transparent 62%);
  animation: drift3 48s ease-in-out infinite;
}
@keyframes drift1 {
  0%, 100% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(7%, 5%) scale(1.12); }
}
@keyframes drift2 {
  0%, 100% { transform: translate(0, 0) scale(1.05); }
  50% { transform: translate(-6%, 7%) scale(1); }
}
@keyframes drift3 {
  0%, 100% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(5%, -6%) scale(1.1); }
}

/* 星空粒子画布 */
#cosmos {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: -1;
  pointer-events: none;
}

/* 鼠标跟随光晕 */
.cursor-glow {
  position: fixed;
  top: 0; left: 0;
  width: 540px;
  height: 540px;
  border-radius: 50%;
  background: radial-gradient(circle,
    rgba(91, 134, 255, .075) 0%,
    rgba(111, 227, 232, .035) 40%,
    transparent 66%);
  pointer-events: none;
  z-index: 1;
  mix-blend-mode: screen;
  will-change: transform;
}
@media (hover: none) { .cursor-glow { display: none; } }

/* ============================================================
   玻璃拟态通用材质
   ============================================================ */
.glass {
  background:
    linear-gradient(135deg, rgba(255, 255, 255, .06), rgba(255, 255, 255, .015)),
    var(--glass-bg);
  backdrop-filter: blur(20px) saturate(160%);
  -webkit-backdrop-filter: blur(20px) saturate(160%);
  border: 1px solid var(--glass-brd);
  box-shadow:
    inset 0 1px 0 var(--glass-hi),
    inset 0 -1px 0 rgba(255, 255, 255, .03),
    0 20px 50px -22px rgba(0, 0, 0, .55);
}

/* 降低透明度环境 / 不支持 backdrop-filter 时的实心回退 */
@media (prefers-reduced-transparency: reduce) {
  .glass, .cap-card, .insight-card, .contact-item, #nav.is-scrolled, .chip-list li {
    backdrop-filter: none !important;
    -webkit-backdrop-filter: none !important;
    background: #0D1430 !important;
  }
}
@supports not ((backdrop-filter: blur(1px)) or (-webkit-backdrop-filter: blur(1px))) {
  .glass, .cap-card, .insight-card, .contact-item, #nav.is-scrolled {
    background: #0D1430;
  }
}

/* ---------------- Reveal ---------------- */
.reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity .55s var(--ease), transform .55s var(--ease);
  transition-delay: var(--d, 0s);
}
.reveal.in { opacity: 1; transform: none; }

/* ---------------- 按钮 ---------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 15px 32px;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 500;
  letter-spacing: .02em;
  transition: transform .35s var(--ease), box-shadow .35s var(--ease),
              background-color .35s var(--ease), color .35s var(--ease),
              border-color .35s var(--ease);
  will-change: transform;
}
.btn:active { transform: scale(.97); }

.btn-primary {
  background: var(--grad-btn);
  color: #050816;
  font-weight: 700;
  box-shadow: 0 0 0 1px rgba(111, 227, 232, .25),
              0 10px 34px -8px rgba(91, 134, 255, .55);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 0 1px rgba(111, 227, 232, .45),
              0 14px 44px -8px rgba(111, 227, 232, .65);
}

.btn-ghost {
  color: var(--ink);
  background: linear-gradient(135deg, rgba(255,255,255,.06), rgba(255,255,255,.02)), rgba(255,255,255,.03);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--glass-brd-2);
  box-shadow: inset 0 1px 0 var(--glass-hi);
}
.btn-ghost:hover {
  transform: translateY(-2px);
  border-color: rgba(111, 227, 232, .55);
  background: linear-gradient(135deg, rgba(111,227,232,.14), rgba(111,227,232,.04)), rgba(111,227,232,.05);
  box-shadow: inset 0 1px 0 var(--glass-hi), 0 0 28px -8px rgba(111, 227, 232, .4);
}

/* ============================================================
   NAV — 玻璃拟态导航
   ============================================================ */
#nav {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 100;
  height: var(--nav-h);
  color: var(--ink);
  transition: background-color .4s var(--ease), box-shadow .4s var(--ease),
              backdrop-filter .4s var(--ease);
}
#nav.is-scrolled {
  background: linear-gradient(180deg, rgba(10, 15, 34, .72), rgba(7, 11, 28, .6));
  backdrop-filter: blur(22px) saturate(160%);
  -webkit-backdrop-filter: blur(22px) saturate(160%);
  border-bottom: 1px solid var(--glass-brd);
  box-shadow: inset 0 1px 0 var(--glass-hi), 0 12px 34px -14px rgba(0, 0, 0, .6);
}
.nav-inner {
  width: min(1200px, 100% - 48px);
  margin-inline: auto;
  height: 100%;
  display: flex;
  align-items: center;
  gap: 32px;
}

.brand { display: inline-flex; align-items: center; gap: 12px; }
.brand-mark { width: 38px; height: 28px; flex: none; }
.brand-text { display: flex; flex-direction: column; line-height: 1.15; }
.brand-en {
  font-family: var(--disp);
  font-weight: 700;
  font-size: 17px;
  letter-spacing: .02em;
}
.brand-cn { font-size: 11px; letter-spacing: .34em; opacity: .68; }

.nav-links {
  display: flex;
  gap: 4px;
  margin-inline: auto;
}
.nav-links a {
  padding: 8px 15px;
  font-size: 15px;
  border-radius: 999px;
  color: var(--ink-2);
  transition: color .3s var(--ease), background-color .3s var(--ease), box-shadow .3s var(--ease);
}
.nav-links a:hover {
  color: var(--ink);
  background: rgba(111, 227, 232, .1);
  box-shadow: inset 0 1px 0 rgba(255,255,255,.06), 0 0 22px -6px rgba(111, 227, 232, .35);
}

.nav-cta {
  flex: none;
  padding: 10px 22px;
  border-radius: 999px;
  font-size: 14px;
  font-weight: 700;
  color: #050816;
  background: var(--grad-btn);
  box-shadow: 0 0 22px -4px rgba(91, 134, 255, .55);
  transition: transform .35s var(--ease), box-shadow .35s var(--ease);
}
.nav-cta:hover {
  transform: translateY(-1px);
  box-shadow: 0 0 32px -4px rgba(111, 227, 232, .7);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 6px;
  background: none;
  border: 0;
  padding: 10px;
  cursor: pointer;
  color: inherit;
}
.nav-toggle span {
  width: 22px; height: 1.6px;
  background: currentColor;
  transition: transform .35s var(--ease);
}
#nav.is-open .nav-toggle span:first-child { transform: translateY(3.8px) rotate(45deg); }
#nav.is-open .nav-toggle span:last-child { transform: translateY(-3.8px) rotate(-45deg); }

/* ============================================================
   HERO
   ============================================================ */
.hero {
  position: relative;
  min-height: 100vh;
  min-height: 100svh;
  display: flex;
  align-items: center;
  overflow: hidden;
}
#tide {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
}
.hero-content {
  position: relative;
  z-index: 2;
  width: min(1200px, 100% - 48px);
  margin-inline: auto;
  padding: calc(var(--nav-h) + 40px) 0 120px;
}
.hero-eyebrow {
  font-family: var(--disp);
  font-weight: 500;
  font-size: 12px;
  letter-spacing: .34em;
  color: var(--aqua);
  margin-bottom: 28px;
  text-shadow: 0 0 18px rgba(111, 227, 232, .4);
}
.hero-title {
  font-family: var(--serif);
  font-weight: 700;
  font-size: clamp(46px, 7.4vw, 92px);
  line-height: 1.14;
  letter-spacing: .02em;
  color: #F4F7FF;
  text-shadow: 0 0 80px rgba(111, 227, 232, .18);
}
.grad-text {
  background: var(--grad-tide);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.hero-en {
  margin-top: 26px;
  font-family: var(--disp);
  font-weight: 300;
  font-size: clamp(15px, 1.6vw, 19px);
  letter-spacing: .07em;
  color: var(--ink-2);
  max-width: 100%;
  overflow-wrap: break-word;
}
.hero-sub {
  margin-top: 12px;
  font-size: clamp(15px, 1.5vw, 18px);
  color: var(--ink-3);
  max-width: 100%;
  overflow-wrap: break-word;
}
.hero-ctas {
  margin-top: 46px;
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}
.hero-hint {
  position: absolute;
  z-index: 2;
  left: 50%;
  bottom: 42px;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  letter-spacing: .3em;
  color: var(--ink-3);
}
.hero-hint svg { width: 14px; height: 14px; animation: hintFloat 2.4s var(--ease) infinite; }
@keyframes hintFloat {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(6px); }
}

/* ============================================================
   SECTIONS 通用
   ============================================================ */
.section { padding: 130px 0; position: relative; }
.section-tint {
  background: rgba(9, 14, 36, .42);
  border-block: 1px solid var(--hairline);
}

.section-head { max-width: 720px; margin-bottom: 72px; }
.section-label {
  font-family: var(--disp);
  font-weight: 500;
  font-size: 13px;
  letter-spacing: .18em;
  color: var(--aqua);
  margin-bottom: 18px;
  display: flex;
  align-items: center;
  gap: 12px;
}
.section-label::after {
  content: "";
  height: 1px;
  width: 56px;
  background: currentColor;
  opacity: .35;
}
.section-label span { color: var(--ink-3); letter-spacing: .24em; font-size: 11px; }
.section-label.light { color: var(--aqua); }
.section-label.light span { color: var(--ink-3); }

.section-title {
  font-family: var(--serif);
  font-weight: 600;
  font-size: clamp(30px, 4vw, 46px);
  line-height: 1.3;
  letter-spacing: .01em;
  color: #F0F4FF;
}

/* ---------------- 能力矩阵（玻璃卡片） ---------------- */
.cap-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.cap-card {
  position: relative;
  border-radius: var(--radius);
  padding: 34px 30px 30px;
  overflow: hidden;
  background:
    linear-gradient(135deg, rgba(255, 255, 255, .06), rgba(255, 255, 255, .015)),
    var(--glass-bg);
  backdrop-filter: blur(20px) saturate(160%);
  -webkit-backdrop-filter: blur(20px) saturate(160%);
  border: 1px solid var(--glass-brd);
  box-shadow:
    inset 0 1px 0 var(--glass-hi),
    inset 0 -1px 0 rgba(255, 255, 255, .03),
    0 20px 50px -22px rgba(0, 0, 0, .55);
  transition: transform .4s var(--ease), border-color .4s var(--ease),
              box-shadow .4s var(--ease), background-color .4s var(--ease);
}
.cap-card::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(280px circle at var(--mx, 50%) var(--my, 50%),
              rgba(91, 134, 255, .16), transparent 66%);
  opacity: 0;
  transition: opacity .4s var(--ease);
  pointer-events: none;
}
.cap-card:hover {
  transform: translateY(-5px);
  border-color: rgba(111, 227, 232, .4);
  box-shadow:
    inset 0 1px 0 var(--glass-hi),
    0 26px 60px -24px rgba(0, 0, 0, .75),
    0 0 44px -12px rgba(91, 134, 255, .4);
}
.cap-card:hover::before { opacity: 1; }

.cap-icon {
  width: 46px; height: 46px;
  border-radius: 12px;
  display: grid;
  place-items: center;
  color: var(--aqua);
  background: rgba(111, 227, 232, .1);
  box-shadow: inset 0 1px 0 rgba(255,255,255,.1), inset 0 0 0 1px rgba(111, 227, 232, .18),
              0 0 20px -6px rgba(111, 227, 232, .35);
  margin-bottom: 22px;
  transition: background .4s var(--ease), color .4s var(--ease), box-shadow .4s var(--ease);
}
.cap-icon svg { width: 24px; height: 24px; }
.cap-card:hover .cap-icon {
  background: var(--grad-btn);
  color: #050816;
  box-shadow: 0 0 30px -4px rgba(91, 134, 255, .7);
}

.cap-card h3 {
  font-family: var(--serif);
  font-weight: 600;
  font-size: 21px;
  color: #F0F4FF;
  margin-bottom: 4px;
}
.cap-en {
  font-family: var(--disp);
  font-weight: 300;
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--ink-3);
  margin-bottom: 14px;
}
.cap-desc { font-size: 15px; color: var(--ink-2); }

/* ---------------- 产品展示 ---------------- */
.product-row {
  display: grid;
  grid-template-columns: 1.15fr 1fr;
  gap: 72px;
  align-items: center;
  padding: 56px 0;
}
.product-row + .product-row { border-top: 1px solid var(--hairline); }
.product-flip .product-visual { order: 2; }
.product-flip .product-copy { order: 1; }

.product-visual svg {
  width: 100%;
  height: auto;
  display: block;
  border-radius: 20px;
  border: 1px solid var(--glass-brd);
  box-shadow:
    inset 0 1px 0 rgba(255,255,255,.06),
    0 34px 80px -34px rgba(0, 0, 0, .8),
    0 0 60px -24px rgba(91, 134, 255, .3);
  transition: transform .5s var(--ease), box-shadow .5s var(--ease);
}
.product-row:hover .product-visual svg {
  transform: translateY(-4px);
  box-shadow:
    inset 0 1px 0 rgba(255,255,255,.06),
    0 40px 90px -34px rgba(0, 0, 0, .85),
    0 0 80px -24px rgba(111, 227, 232, .4);
}
.pv-ripples circle { transform-origin: 240px 160px; animation: pvPulse 5s var(--ease) infinite; }
.pv-ripples circle:nth-child(2) { animation-delay: .8s; }
.pv-ripples circle:nth-child(3) { animation-delay: 1.6s; }
.pv-ripples circle:nth-child(4) { animation-delay: 2.4s; }
@keyframes pvPulse {
  0%, 100% { opacity: .18; }
  50% { opacity: .95; }
}
.pv-nodes circle { animation: pvNode 3.2s var(--ease) infinite; }
.pv-nodes circle:nth-child(2) { animation-delay: .5s; }
.pv-nodes circle:nth-child(3) { animation-delay: 1s; }
.pv-nodes circle:nth-child(4) { animation-delay: 1.5s; }
.pv-nodes circle:nth-child(5) { animation-delay: 2s; }
@keyframes pvNode {
  0%, 100% { stroke-width: 2; }
  50% { stroke-width: 3.5; }
}
.pv-waves { animation: pvDrift 9s ease-in-out infinite alternate; }
@keyframes pvDrift {
  from { transform: translateX(-8px); }
  to { transform: translateX(8px); }
}

.product-num {
  font-family: var(--disp);
  font-weight: 300;
  font-size: clamp(56px, 6vw, 84px);
  line-height: 1;
  color: transparent;
  -webkit-text-stroke: 1px rgba(146, 168, 255, .32);
  margin-bottom: 18px;
  font-variant-numeric: tabular-nums;
}
.product-name {
  font-family: var(--serif);
  font-weight: 600;
  font-size: clamp(26px, 2.6vw, 34px);
  color: #F0F4FF;
}
.product-name span {
  font-family: var(--disp);
  font-weight: 500;
  font-size: .55em;
  color: var(--ink-3);
  letter-spacing: .04em;
  margin-left: 10px;
}
.product-tag {
  margin-top: 8px;
  font-size: 14px;
  letter-spacing: .12em;
  color: var(--aqua);
}
.product-desc {
  margin-top: 18px;
  color: var(--ink-2);
  max-width: 44ch;
}
.chip-list {
  margin-top: 24px;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  list-style: none;
}
.chip-list li {
  font-size: 13px;
  color: var(--ink-2);
  border: 1px solid var(--glass-brd-2);
  border-radius: 999px;
  padding: 6px 16px;
  background: linear-gradient(135deg, rgba(255,255,255,.05), rgba(255,255,255,.01)), rgba(255,255,255,.03);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  box-shadow: inset 0 1px 0 rgba(255,255,255,.05);
}
.text-link {
  margin-top: 28px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 15px;
  font-weight: 500;
  color: var(--aqua);
}
.text-link span { transition: transform .35s var(--ease); }
.text-link:hover span { transform: translateX(5px); }

/* ---------------- 方法论 ---------------- */
.method-track {
  position: relative;
  height: 300px;
}
.method-track svg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  overflow: visible;
}
.method-track .flow { animation: tideFlow 6s linear infinite; }
@keyframes tideFlow {
  from { stroke-dashoffset: 248; }
  to { stroke-dashoffset: 0; }
}

.method-node {
  position: absolute;
  top: 50%;
  transform: translate(-50%, 0);
  display: flex;
  flex-direction: column;
  align-items: center;
}
.method-node .dot {
  width: 15px; height: 15px;
  border-radius: 50%;
  background: var(--bg-2);
  border: 2px solid var(--aqua);
  transform: translateY(-50%);
  box-shadow: 0 0 16px rgba(111, 227, 232, .55),
              0 0 0 5px rgba(111, 227, 232, .08);
}
.method-label {
  position: absolute;
  width: 190px;
  text-align: center;
  left: 50%;
  transform: translateX(-50%);
}
.label-up { bottom: 34px; }
.label-down { top: 26px; }
.m-num {
  font-family: var(--disp);
  font-weight: 300;
  font-size: 13px;
  color: var(--aqua);
  letter-spacing: .1em;
}
.method-label h3 {
  font-family: var(--serif);
  font-weight: 600;
  font-size: 19px;
  color: #F0F4FF;
  margin-top: 2px;
}
.m-en {
  font-family: var(--disp);
  font-weight: 300;
  font-size: 11px;
  letter-spacing: .2em;
  color: var(--ink-3);
  text-transform: uppercase;
  margin-bottom: 6px;
}
.m-desc { font-size: 13px; line-height: 1.6; color: var(--ink-2); }

.method-list { display: none; }

/* ---------------- 洞察（玻璃卡片） ---------------- */
.insight-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.insight-card {
  display: flex;
  flex-direction: column;
  border-radius: var(--radius);
  padding: 30px 28px 26px;
  background:
    linear-gradient(135deg, rgba(255, 255, 255, .06), rgba(255, 255, 255, .015)),
    var(--glass-bg);
  backdrop-filter: blur(20px) saturate(160%);
  -webkit-backdrop-filter: blur(20px) saturate(160%);
  border: 1px solid var(--glass-brd);
  box-shadow:
    inset 0 1px 0 var(--glass-hi),
    inset 0 -1px 0 rgba(255, 255, 255, .03),
    0 20px 50px -22px rgba(0, 0, 0, .55);
  transition: transform .4s var(--ease), border-color .4s var(--ease),
              box-shadow .4s var(--ease), background-color .4s var(--ease);
}
.insight-card:hover {
  transform: translateY(-5px);
  border-color: rgba(111, 227, 232, .4);
  box-shadow:
    inset 0 1px 0 var(--glass-hi),
    0 26px 60px -24px rgba(0, 0, 0, .75),
    0 0 44px -12px rgba(91, 134, 255, .38);
}
.i-cat {
  font-size: 12px;
  letter-spacing: .2em;
  color: var(--aqua);
  margin-bottom: 16px;
}
.insight-card h3 {
  font-family: var(--serif);
  font-weight: 600;
  font-size: 21px;
  line-height: 1.5;
  color: #F0F4FF;
  transition: color .35s var(--ease);
}
.insight-card:hover h3 { color: var(--aqua); }
.i-ex {
  margin-top: 12px;
  font-size: 14px;
  color: var(--ink-2);
  flex: 1;
}
.i-meta {
  margin-top: 22px;
  padding-top: 16px;
  border-top: 1px solid var(--hairline);
  font-family: var(--disp);
  font-weight: 300;
  font-size: 12.5px;
  letter-spacing: .06em;
  color: var(--ink-3);
  font-variant-numeric: tabular-nums;
}

/* ---------------- CTA ---------------- */
.cta {
  position: relative;
  padding: 170px 0;
  overflow: hidden;
}
.cta::before {
  content: "";
  position: absolute;
  left: 50%; top: 50%;
  width: 940px; height: 940px;
  transform: translate(-50%, -50%);
  background: radial-gradient(circle,
    rgba(91, 134, 255, .22) 0%,
    rgba(111, 227, 232, .08) 40%,
    transparent 68%);
  pointer-events: none;
}
.cta-star {
  position: absolute;
  width: 3px; height: 3px;
  border-radius: 50%;
  background: #fff;
  box-shadow: 0 0 10px 1px rgba(111, 227, 232, .95);
  animation: twinkle 3.6s ease-in-out infinite;
}
@keyframes twinkle {
  0%, 100% { opacity: .15; transform: scale(.8); }
  50% { opacity: 1; transform: scale(1.3); }
}
.cta-inner { position: relative; text-align: center; }
.cta-inner .section-label { justify-content: center; }
.cta-inner .section-label::after { display: none; }
.cta-title {
  font-family: var(--serif);
  font-weight: 700;
  font-size: clamp(32px, 5vw, 56px);
  line-height: 1.3;
  color: #F4F7FF;
  margin-top: 20px;
  text-shadow: 0 0 70px rgba(111, 227, 232, .2);
}
.cta-actions {
  margin-top: 50px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 28px;
  flex-wrap: wrap;
}
.cta-mail {
  display: inline-block;
  margin-top: 42px;
  font-family: var(--disp);
  font-weight: 500;
  font-size: clamp(17px, 1.8vw, 21px);
  letter-spacing: .03em;
  color: #fff;
  border-bottom: 1px solid rgba(234, 239, 253, .3);
  padding-bottom: 3px;
  transition: color .35s var(--ease), border-color .35s var(--ease), text-shadow .35s var(--ease);
}
.cta-mail:hover {
  color: var(--aqua);
  border-color: var(--aqua);
  text-shadow: 0 0 20px rgba(111, 227, 232, .5);
}
.cta-credit {
  margin-top: 22px;
  font-family: var(--disp);
  font-weight: 300;
  font-size: 13px;
  letter-spacing: .06em;
  color: var(--ink-3);
}
.cta-credit a {
  color: var(--ink-2);
  border-bottom: 1px solid rgba(169, 180, 212, .3);
  transition: color .3s var(--ease), border-color .3s var(--ease);
}
.cta-credit a:hover { color: #fff; border-color: #fff; }

/* ============================================================
   FOOTER
   ============================================================ */
#footer {
  padding: 90px 0 40px;
  position: relative;
}
.foot-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 48px;
  padding-bottom: 64px;
}
.foot-brand .brand { color: var(--ink); }
.foot-blurb {
  margin-top: 22px;
  font-size: 14px;
  line-height: 2;
  color: var(--ink-2);
}
.foot-title {
  font-size: 13px;
  letter-spacing: .22em;
  color: var(--ink-3);
  margin-bottom: 20px;
}
.foot-col a {
  display: block;
  font-size: 14.5px;
  color: var(--ink-2);
  padding: 6px 0;
  transition: color .3s var(--ease);
}
.foot-col a:hover { color: var(--aqua); }
.foot-bar {
  border-top: 1px solid var(--hairline);
  padding-top: 28px;
  display: flex;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  font-size: 13px;
  color: var(--ink-3);
}

/* ============================================================
   响应式
   ============================================================ */
@media (max-width: 1024px) {
  .cap-grid { grid-template-columns: repeat(2, 1fr); }
  .product-row { gap: 44px; }
  .insight-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  .nav-links {
    position: absolute;
    top: var(--nav-h);
    left: 0; right: 0;
    flex-direction: column;
    gap: 0;
    background: rgba(6, 9, 22, .96);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--glass-brd);
    box-shadow: 0 24px 40px -24px rgba(0, 0, 0, .8);
    padding: 12px 24px 20px;
    display: none;
  }
  #nav.is-open .nav-links { display: flex; }
  .nav-links a { color: var(--ink); padding: 14px 8px; font-size: 16px; }
  .nav-cta { display: none; }
  .nav-toggle { display: flex; margin-left: auto; }
  .nav-inner { gap: 16px; }

  .section { padding: 88px 0; }
  .section-head { margin-bottom: 48px; }

  /* 移动端防文字溢出 */
  .hero-en, .hero-sub { letter-spacing: .02em; }

  .cap-grid { grid-template-columns: 1fr; }

  .product-row { grid-template-columns: 1fr; gap: 32px; padding: 44px 0; }
  .product-flip .product-visual { order: 0; }

  .method-track { display: none; }
  .method-list {
    display: block;
    list-style: none;
    border-left: 1px solid var(--hairline-strong);
  }
  .method-list li {
    position: relative;
    padding: 0 0 34px 28px;
  }
  .method-list li::before {
    content: "";
    position: absolute;
    left: -6.5px; top: 8px;
    width: 12px; height: 12px;
    border-radius: 50%;
    background: var(--bg-2);
    border: 2px solid var(--aqua);
    box-shadow: 0 0 12px rgba(111, 227, 232, .5);
  }
  .method-list .m-num {
    font-family: var(--disp);
    font-weight: 300;
    font-size: 12px;
    color: var(--aqua);
  }
  .method-list h3 {
    font-family: var(--serif);
    font-size: 19px;
    font-weight: 600;
    color: #F0F4FF;
    margin: 2px 0 4px;
  }
  .method-list .m-en {
    display: inline;
    font-size: 11px;
    letter-spacing: .16em;
    color: var(--ink-3);
    margin-left: 6px;
  }
  .method-list li p:not(.m-num) { font-size: 14px; color: var(--ink-2); }

  .insight-grid { grid-template-columns: 1fr; }

  .cta { padding: 110px 0; }
  .hero-hint { display: none; }

  .foot-grid { grid-template-columns: 1fr; gap: 36px; padding-bottom: 48px; }

}

/* ---------------- Reduced motion ---------------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
  .cursor-glow { display: none; }
  .aurora .blob { animation: none; }
  .hero-hint svg,
  .cta-star,
  .pv-ripples circle,
  .pv-nodes circle,
  .pv-waves,
  .method-track .flow { animation: none; }
}

/* ---------------- Keyboard focus ---------------- */
:focus-visible {
  outline: 2px solid #6FE3E8;
  outline-offset: 3px;
  border-radius: 4px;
}