/* =========================================================
   灵枢大数据平台 · 介绍首页
   ========================================================= */

:root {
  --brand: #1f5fd1;
  --brand-2: #3b82f6;
  --brand-3: #22d3ee;
  --ink: #0f172a;
  --ink-2: #334155;
  --ink-3: #64748b;
  --line: #e6ecf6;
  --bg-muted: #f5f8fd;
  --dark: #0a1526;
  --dark-2: #0e1e36;
  --white: #ffffff;
  --radius: 16px;
  --maxw: 1200px;
  --shadow-sm: 0 1px 2px rgba(15, 23, 42, .04), 0 8px 24px -12px rgba(15, 23, 42, .12);
  --shadow-md: 0 12px 32px -12px rgba(21, 60, 124, .24);
  --ease: cubic-bezier(.22, .61, .36, 1);
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 76px;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", -apple-system,
               BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  color: var(--ink);
  background: var(--white);
  line-height: 1.7;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

a { color: inherit; text-decoration: none; }
ul { list-style: none; }
img { max-width: 100%; display: block; }
button { font: inherit; cursor: pointer; border: 0; background: none; color: inherit; }

.container {
  width: 100%;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 32px;
}

/* ======================= 导航栏 ======================= */
.navbar {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 999;
  background: rgba(255, 255, 255, .97);
  backdrop-filter: saturate(180%) blur(14px);
  -webkit-backdrop-filter: saturate(180%) blur(14px);
  border-bottom: 1px solid transparent;
  transition: background .3s var(--ease), border-color .3s var(--ease), box-shadow .3s var(--ease);
}

.navbar.is-scrolled {
  background: rgba(255, 255, 255, 1);
  border-bottom-color: var(--line);
  box-shadow: 0 4px 24px -16px rgba(15, 23, 42, .35);
}

.navbar__inner {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 32px;
  height: 76px;
  display: flex;
  align-items: center;
  gap: 24px;
}

.navbar__logo {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-shrink: 0;
}

.navbar__logo img { height: 34px; width: auto; }

.navbar__divider {
  width: 1px;
  height: 18px;
  background: var(--line);
}

.navbar__product {
  font-size: 15px;
  font-weight: 600;
  letter-spacing: .04em;
  color: var(--ink);
  white-space: nowrap;
}

.navbar__menu {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 4px;
}

.nav-link {
  position: relative;
  padding: 8px 14px;
  font-size: 15px;
  color: var(--ink-2);
  border-radius: 8px;
  transition: color .22s var(--ease), background .22s var(--ease);
  white-space: nowrap;
}

.nav-link:hover { color: var(--brand); background: rgba(31, 95, 209, .06); }

.nav-link.is-active { color: var(--brand); font-weight: 600; }

.nav-link.is-active::after {
  content: "";
  position: absolute;
  left: 14px;
  right: 14px;
  bottom: 2px;
  height: 2px;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--brand), var(--brand-3));
}

.nav-link--external {
  padding-right: 22px;
}

.nav-link--external::before {
  content: "↗";
  font-size: 11px;
  opacity: .55;
  position: absolute;
  top: 6px;
  right: 8px;
}

.navbar__toggle {
  display: none;
  width: 40px;
  height: 40px;
  margin-left: auto;
  border-radius: 10px;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
}

.navbar__toggle span {
  display: block;
  width: 20px;
  height: 2px;
  border-radius: 2px;
  background: var(--ink);
  transition: transform .3s var(--ease), opacity .2s var(--ease);
}

.navbar__toggle.is-open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.navbar__toggle.is-open span:nth-child(2) { opacity: 0; }
.navbar__toggle.is-open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ======================= 首屏 ======================= */
.hero {
  position: relative;
  background: radial-gradient(120% 90% at 78% 8%, #143a6e 0%, #0a1526 46%, #060e1c 100%);
  color: var(--white);
  padding: 152px 0 0;
  overflow: hidden;
  isolation: isolate;
}

.hero__grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(120, 170, 255, .07) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(120, 170, 255, .07) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: radial-gradient(90% 70% at 50% 30%, #000 20%, transparent 78%);
  -webkit-mask-image: radial-gradient(90% 70% at 50% 30%, #000 20%, transparent 78%);
  z-index: -1;
}

.hero__glow {
  position: absolute;
  border-radius: 50%;
  filter: blur(90px);
  z-index: -1;
  pointer-events: none;
}

.hero__glow--1 {
  width: 620px; height: 620px;
  right: -140px; top: -180px;
  background: rgba(37, 99, 235, .38);
}

.hero__glow--2 {
  width: 460px; height: 460px;
  left: -160px; bottom: -80px;
  background: rgba(34, 211, 238, .18);
}

.hero__inner {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 32px;
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr);
  align-items: center;
  gap: 48px;
  min-height: calc(100vh - 330px);
  padding-bottom: 24px;
}

.hero__eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 13.5px;
  letter-spacing: .14em;
  color: #9db9e6;
  padding: 7px 16px 7px 12px;
  border: 1px solid rgba(120, 170, 255, .24);
  border-radius: 100px;
  background: rgba(120, 170, 255, .07);
  margin-bottom: 28px;
}

.hero__eyebrow .dot {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--brand-3);
  box-shadow: 0 0 0 4px rgba(34, 211, 238, .18);
  animation: pulse 2.4s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { box-shadow: 0 0 0 3px rgba(34, 211, 238, .18); }
  50% { box-shadow: 0 0 0 7px rgba(34, 211, 238, .04); }
}

.hero__title {
  font-size: clamp(40px, 5.2vw, 64px);
  line-height: 1.14;
  font-weight: 800;
  letter-spacing: -.01em;
  margin-bottom: 18px;
}

.hero__title em {
  font-style: normal;
  background: linear-gradient(100deg, #dbeafe 12%, #7dd3fc 52%, #38bdf8 92%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero__slogan {
  font-size: clamp(17px, 1.6vw, 21px);
  font-weight: 500;
  letter-spacing: .22em;
  color: #b9d2f5;
  margin-bottom: 22px;
}

.hero__desc {
  font-size: 16px;
  line-height: 1.95;
  color: #93a9c7;
  max-width: 560px;
  margin-bottom: 34px;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-bottom: 26px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 48px;
  padding: 0 28px;
  border-radius: 10px;
  font-size: 15px;
  font-weight: 600;
  letter-spacing: .02em;
  transition: transform .25s var(--ease), box-shadow .25s var(--ease),
              background .25s var(--ease), color .25s var(--ease), border-color .25s var(--ease);
}

.btn--primary {
  color: #fff;
  background: linear-gradient(135deg, #2563eb, #1d4ed8);
  box-shadow: 0 10px 26px -12px rgba(37, 99, 235, .9);
}

.btn--primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 16px 32px -12px rgba(37, 99, 235, .85);
}

.btn--ghost {
  color: #cfe0f7;
  border: 1px solid rgba(147, 197, 253, .3);
  background: rgba(147, 197, 253, .05);
}

.btn--ghost:hover {
  border-color: rgba(147, 197, 253, .6);
  background: rgba(147, 197, 253, .12);
  transform: translateY(-2px);
}

.btn--ghost-light {
  color: #dbeafe;
  border: 1px solid rgba(219, 234, 254, .32);
  background: rgba(255, 255, 255, .06);
}

.btn--ghost-light:hover {
  background: rgba(255, 255, 255, .14);
  border-color: rgba(219, 234, 254, .6);
  transform: translateY(-2px);
}

.hero__status {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 13.5px;
  color: #7f96b6;
}

.badge {
  display: inline-block;
  padding: 2px 10px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: .06em;
  color: #7dd3fc;
  border: 1px solid rgba(125, 211, 252, .34);
  border-radius: 100px;
  background: rgba(125, 211, 252, .09);
}

/* ---------- 首屏视觉：数据枢 ---------- */
.hero__visual {
  display: flex;
  align-items: center;
  justify-content: center;
  perspective: 900px;
}

.orb {
  position: relative;
  width: min(440px, 100%);
  aspect-ratio: 1;
  display: flex;
  align-items: center;
  justify-content: center;
}

.orb__core {
  position: relative;
  width: 42%;
  aspect-ratio: 1;
  border-radius: 50%;
  display: grid;
  place-items: center;
  background: radial-gradient(circle at 32% 26%, rgba(96, 165, 250, .95), rgba(29, 78, 216, .85) 58%, rgba(12, 40, 90, .9) 100%);
  box-shadow:
    0 0 60px rgba(37, 99, 235, .55),
    0 0 120px rgba(34, 211, 238, .22),
    inset 0 -14px 40px rgba(6, 20, 45, .55),
    inset 0 14px 30px rgba(191, 219, 254, .28);
  animation: float 7s ease-in-out infinite;
}

.orb__core::after {
  content: "";
  position: absolute;
  inset: 8%;
  border-radius: 50%;
  border: 1px solid rgba(191, 219, 254, .22);
}

@keyframes float {
  0%, 100% { transform: translateY(-6px); }
  50% { transform: translateY(6px); }
}

/* 中心立方体 */
.orb__cube {
  position: relative;
  width: 58px;
  height: 58px;
  transform-style: preserve-3d;
  animation: spin 16s linear infinite;
  transform: rotateX(-22deg) rotateY(0deg);
}

.orb__cube i {
  position: absolute;
  inset: 0;
  border: 1px solid rgba(186, 230, 253, .8);
  background: rgba(56, 189, 248, .12);
  box-shadow: inset 0 0 16px rgba(56, 189, 248, .35);
}

.orb__cube i:nth-child(1) { transform: translateZ(29px); }
.orb__cube i:nth-child(2) { transform: rotateY(180deg) translateZ(29px); }
.orb__cube i:nth-child(3) { transform: rotateY(90deg) translateZ(29px); }
.orb__cube i:nth-child(4) { transform: rotateY(-90deg) translateZ(29px); }
.orb__cube i:nth-child(5) { transform: rotateX(90deg) translateZ(29px); }
.orb__cube i:nth-child(6) { transform: rotateX(-90deg) translateZ(29px); }

@keyframes spin {
  from { transform: rotateX(-22deg) rotateY(0deg); }
  to   { transform: rotateX(-22deg) rotateY(360deg); }
}

.orb__ring {
  position: absolute;
  border-radius: 50%;
  border: 1px solid rgba(125, 180, 255, .22);
}

.orb__ring--1 {
  inset: 6%;
  border-style: dashed;
  border-color: rgba(125, 180, 255, .26);
  animation: rotate 34s linear infinite;
}

.orb__ring--2 {
  inset: 20%;
  border-color: rgba(34, 211, 238, .26);
  box-shadow: inset 0 0 40px rgba(34, 211, 238, .07);
  animation: rotate 26s linear infinite reverse;
}

.orb__ring--3 {
  inset: -6%;
  border-color: rgba(125, 180, 255, .12);
  transform: rotateX(72deg);
  box-shadow: 0 0 60px rgba(37, 99, 235, .12);
  animation: breathe 6s ease-in-out infinite;
}

@keyframes breathe {
  0%, 100% { opacity: .55; }
  50% { opacity: 1; }
}

@keyframes rotate {
  from { transform: rotate(0deg); }
  to   { transform: rotate(360deg); }
}

.orb__node {
  position: absolute;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: #7dd3fc;
  box-shadow: 0 0 12px 3px rgba(125, 211, 252, .6);
}

.orb__node--a { top: 12%; left: 44%; animation: float 5s ease-in-out infinite; }
.orb__node--b { right: 12%; top: 42%; animation: float 6.4s ease-in-out infinite .6s; }
.orb__node--c { bottom: 13%; left: 40%; animation: float 5.6s ease-in-out infinite 1.1s; }
.orb__node--d { left: 11%; top: 40%; animation: float 7.2s ease-in-out infinite .3s; }

/* ---------- 首屏数据条 ---------- */
.hero__stats {
  position: relative;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 32px;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border-top: 1px solid rgba(125, 180, 255, .14);
}

.stat {
  padding: 26px 24px 34px;
  border-right: 1px solid rgba(125, 180, 255, .1);
}

.stat:last-child { border-right: 0; }

.stat__title {
  font-size: 17px;
  font-weight: 600;
  color: #e2edff;
  letter-spacing: .04em;
  margin-bottom: 4px;
}

.stat__desc {
  font-size: 13.5px;
  color: #7d94b4;
}

/* ======================= 通用区块 ======================= */
.section {
  position: relative;
  padding: 108px 0;
  background: var(--white);
}

.section--muted {
  background: var(--bg-muted);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.section--dark {
  background: radial-gradient(110% 80% at 50% 0%, #14294a 0%, var(--dark) 62%);
  color: var(--white);
}

.section__head {
  max-width: 720px;
  margin: 0 auto 64px;
  text-align: center;
}

.section__label {
  font-size: 12.5px;
  font-weight: 700;
  letter-spacing: .24em;
  color: var(--brand);
  margin-bottom: 14px;
}

.section__title {
  font-size: clamp(28px, 3vw, 40px);
  line-height: 1.3;
  font-weight: 700;
  letter-spacing: -.01em;
  margin-bottom: 18px;
}

.section__desc {
  font-size: 16px;
  line-height: 1.9;
  color: var(--ink-3);
}

.section__head--dark .section__label { color: #7dd3fc; }
.section__head--dark .section__title { color: #f1f6ff; }
.section__head--dark .section__desc { color: #93a9c7; }

/* ======================= 痛点卡片 ======================= */
.pain-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.pain-card {
  position: relative;
  padding: 38px 32px 32px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--white);
  transition: transform .35s var(--ease), box-shadow .35s var(--ease), border-color .35s var(--ease);
  overflow: hidden;
}

.pain-card::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 3px;
  background: linear-gradient(90deg, var(--brand), var(--brand-3));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .4s var(--ease);
}

.pain-card:hover {
  transform: translateY(-6px);
  border-color: rgba(31, 95, 209, .22);
  box-shadow: var(--shadow-md);
}

.pain-card:hover::before { transform: scaleX(1); }

.pain-card__index {
  display: block;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .12em;
  color: #b6c6dd;
  margin-bottom: 16px;
}

.pain-card h3 {
  font-size: 21px;
  font-weight: 700;
  margin-bottom: 12px;
}

.pain-card p {
  font-size: 15px;
  color: var(--ink-3);
  line-height: 1.85;
  margin-bottom: 22px;
}

.pain-card__solution {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding-top: 18px;
  border-top: 1px dashed var(--line);
  width: 100%;
  font-size: 14.5px;
  font-weight: 600;
  color: var(--brand);
}

.pain-card__solution svg { width: 17px; height: 17px; }

/* ======================= 能力卡片 ======================= */
.cap-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.cap-card {
  padding: 34px 30px;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  transition: transform .35s var(--ease), box-shadow .35s var(--ease),
              border-color .35s var(--ease);
}

.cap-card:hover {
  transform: translateY(-6px);
  border-color: rgba(31, 95, 209, .2);
  box-shadow: var(--shadow-md);
}

.cap-card__icon {
  width: 52px;
  height: 52px;
  display: grid;
  place-items: center;
  border-radius: 13px;
  margin-bottom: 22px;
  color: var(--brand);
  background: linear-gradient(140deg, rgba(31, 95, 209, .1), rgba(34, 211, 238, .1));
  transition: background .35s var(--ease), color .35s var(--ease);
}

.cap-card:hover .cap-card__icon {
  background: linear-gradient(140deg, #2563eb, #1d4ed8);
  color: #fff;
}

.cap-card__icon svg { width: 26px; height: 26px; }

.cap-card h3 {
  font-size: 19px;
  font-weight: 700;
  margin-bottom: 10px;
}

.cap-card p {
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--ink-3);
  margin-bottom: 20px;
}

.cap-card__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.cap-card__tags li {
  font-size: 12.5px;
  color: #4b6a99;
  padding: 3px 10px;
  border-radius: 6px;
  background: #eef4ff;
  border: 1px solid #e0ebff;
}

/* ======================= 技术架构 ======================= */
.arch {
  max-width: 1040px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.arch__layer {
  display: grid;
  grid-template-columns: 190px 1fr;
  gap: 18px;
  padding: 16px 18px;
  border-radius: 12px;
  border: 1px solid rgba(125, 180, 255, .16);
  background: linear-gradient(100deg, rgba(30, 58, 105, .55), rgba(15, 32, 60, .35));
  transition: transform .35s var(--ease), border-color .35s var(--ease), background .35s var(--ease);
}

.arch__layer:hover {
  transform: translateX(6px);
  border-color: rgba(125, 211, 252, .42);
  background: linear-gradient(100deg, rgba(37, 78, 145, .6), rgba(15, 32, 60, .4));
}

.arch__label {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 2px;
  padding-left: 6px;
}

.arch__label span {
  font-size: 15.5px;
  font-weight: 600;
  color: #e8f2ff;
  letter-spacing: .04em;
}

.arch__label small {
  font-size: 11px;
  letter-spacing: .1em;
  color: #6f8db5;
  text-transform: uppercase;
}

.arch__items {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
}

.arch__items span {
  padding: 7px 14px;
  font-size: 13.5px;
  color: #bcd6f7;
  border-radius: 8px;
  border: 1px solid rgba(125, 180, 255, .2);
  background: rgba(125, 180, 255, .07);
  transition: color .25s var(--ease), background .25s var(--ease), border-color .25s var(--ease);
}

.arch__items span:hover {
  color: #fff;
  background: rgba(56, 189, 248, .18);
  border-color: rgba(125, 211, 252, .5);
}

.arch__layer--source {
  border-style: dashed;
  opacity: .92;
}

/* ======================= 优势 ======================= */
.adv-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 22px;
}

.adv-card {
  position: relative;
  padding: 34px 26px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(180deg, #fbfdff, var(--white));
  overflow: hidden;
  transition: transform .35s var(--ease), box-shadow .35s var(--ease), border-color .35s var(--ease);
}

.adv-card::after {
  content: "";
  position: absolute;
  width: 120px;
  height: 120px;
  right: -40px;
  top: -40px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(34, 211, 238, .16), transparent 70%);
  transition: transform .5s var(--ease);
}

.adv-card:hover {
  transform: translateY(-6px);
  border-color: rgba(31, 95, 209, .2);
  box-shadow: var(--shadow-md);
}

.adv-card:hover::after { transform: scale(1.5); }

.adv-card__num {
  display: block;
  font-size: 26px;
  font-weight: 800;
  line-height: 1;
  margin-bottom: 18px;
  background: linear-gradient(135deg, var(--brand), var(--brand-3));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  letter-spacing: -.02em;
}

.adv-card h3 {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 10px;
}

.adv-card p {
  font-size: 14px;
  line-height: 1.85;
  color: var(--ink-3);
}

/* ======================= 使用指引 ======================= */
.steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  position: relative;
  margin-bottom: 48px;
}

.steps::before {
  content: "";
  position: absolute;
  top: 26px;
  left: 6%;
  right: 6%;
  height: 1px;
  background: repeating-linear-gradient(90deg, #c9d9f0 0 8px, transparent 8px 16px);
  z-index: 0;
}

.step {
  position: relative;
  z-index: 1;
  text-align: center;
  padding: 0 8px;
}

.step__dot {
  display: grid;
  place-items: center;
  width: 54px;
  height: 54px;
  margin: 0 auto 22px;
  border-radius: 50%;
  font-size: 17px;
  font-weight: 700;
  color: var(--brand);
  background: var(--white);
  border: 1px solid #d8e5f8;
  box-shadow: 0 6px 18px -10px rgba(31, 95, 209, .5);
  transition: transform .35s var(--ease), background .35s var(--ease), color .35s var(--ease);
}

.step:hover .step__dot {
  transform: translateY(-4px) scale(1.06);
  background: linear-gradient(135deg, #2563eb, #1d4ed8);
  border-color: transparent;
  color: #fff;
}

.step h3 {
  font-size: 17px;
  font-weight: 700;
  margin-bottom: 10px;
}

.step p {
  font-size: 14px;
  line-height: 1.8;
  color: var(--ink-3);
}

.notice {
  display: flex;
  gap: 20px;
  align-items: flex-start;
  max-width: 900px;
  margin: 0 auto;
  padding: 26px 30px;
  border-radius: 14px;
  border: 1px solid #dbe8fb;
  background: linear-gradient(120deg, #eef5ff, #f7fbff);
}

.notice__icon {
  flex-shrink: 0;
  width: 42px;
  height: 42px;
  display: grid;
  place-items: center;
  border-radius: 11px;
  color: var(--brand);
  background: rgba(31, 95, 209, .09);
}

.notice__icon svg { width: 22px; height: 22px; }

.notice__body h3 {
  font-size: 16.5px;
  font-weight: 700;
  margin-bottom: 6px;
}

.notice__body p {
  font-size: 14.5px;
  line-height: 1.85;
  color: #4f6a90;
}

/* ======================= CTA ======================= */
.cta {
  padding: 0 0 96px;
  background: var(--white);
}

.cta__box {
  position: relative;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  flex-wrap: wrap;
  padding: 54px 56px;
  border-radius: 22px;
  color: var(--white);
  background: radial-gradient(120% 160% at 88% 0%, #1e4b9c 0%, #13306b 45%, #0d2350 100%);
  box-shadow: 0 30px 60px -30px rgba(16, 48, 105, .65);
}

.cta__box::after {
  content: "";
  position: absolute;
  right: -80px;
  top: -120px;
  width: 360px;
  height: 360px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(34, 211, 238, .28), transparent 68%);
  pointer-events: none;
}

.cta__text { position: relative; z-index: 1; }

.cta__text h2 {
  font-size: clamp(24px, 2.6vw, 32px);
  font-weight: 700;
  margin-bottom: 12px;
}

.cta__text p {
  font-size: 15.5px;
  color: #a8c2e6;
}

.cta__actions {
  position: relative;
  z-index: 1;
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

/* ======================= 页脚 ======================= */
.footer {
  background: #333333;
  color: #ffffff;
  padding: 48px 0 20px;
}

.footer__inner {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 32px;
}

.footer__top {
  display: flex;
  gap: 40px;
  padding-bottom: 30px;
  border-bottom: 1px solid rgba(255, 255, 255, .1);
  flex-wrap: wrap;
}

.footer__col h3 {
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 16px;
  color: #fff;
}

.footer__col--about { flex: 1; min-width: 170px; }
.footer__col--contact { flex: 2; min-width: 300px; }
.footer__col--qr { flex: 1; min-width: 140px; text-align: center; }

.footer__col ul li { margin-bottom: 9px; }

.footer__col ul a {
  font-size: 14px;
  color: #cccccc;
  transition: color .25s var(--ease);
}

.footer__col ul a:hover { color: #4d9bff; }

.footer__col--contact p {
  display: flex;
  align-items: flex-start;
  gap: 9px;
  font-size: 14px;
  color: #cccccc;
  margin-bottom: 9px;
  line-height: 1.7;
}

.footer__col--contact svg {
  width: 15px;
  height: 15px;
  flex-shrink: 0;
  margin-top: 5px;
  color: #4d9bff;
}

.footer__col--contact a { color: #cccccc; transition: color .25s var(--ease); }
.footer__col--contact a:hover { color: #4d9bff; }

.footer__qr {
  width: 88px;
  height: 88px;
  margin: 0 auto;
  object-fit: contain;
  border-radius: 6px;
  background: #fff;
  padding: 4px;
}

.footer__bottom {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 8px 22px;
  padding-top: 22px;
  font-size: 12.5px;
  color: #cccccc;
}

.footer__license {
  display: inline-flex;
  align-items: center;
  gap: 7px;
}

.footer__license a {
  color: #cccccc;
  letter-spacing: .02em;
  transition: color .25s var(--ease);
}

.footer__license a:hover { color: #4d9bff; }

.footer__shield {
  display: inline-flex;
  color: #8a99ab;
}

.footer__shield svg { width: 15px; height: 15px; }

/* ======================= 返回顶部 ======================= */
.back-top {
  position: fixed;
  right: 26px;
  bottom: 26px;
  width: 44px;
  height: 44px;
  display: grid;
  place-items: center;
  border-radius: 12px;
  color: #fff;
  background: rgba(21, 45, 82, .88);
  backdrop-filter: blur(8px);
  box-shadow: 0 10px 24px -12px rgba(0, 0, 0, .6);
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: opacity .3s var(--ease), transform .3s var(--ease),
              visibility .3s var(--ease), background .25s var(--ease);
  z-index: 900;
}

.back-top.is-visible { opacity: 1; visibility: visible; transform: translateY(0); }
.back-top:hover { background: var(--brand); }
.back-top svg { width: 20px; height: 20px; }

/* ======================= 滚动动效 ======================= */
.reveal {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity .7s var(--ease), transform .7s var(--ease);
  transition-delay: var(--delay, 0ms);
}

.reveal.is-in {
  opacity: 1;
  transform: none;
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
  .orb__core, .orb__ring, .orb__cube, .orb__node, .hero__eyebrow .dot { animation: none !important; }
}

/* ======================= 响应式 ======================= */
@media (max-width: 1080px) {
  .nav-link { padding: 8px 10px; font-size: 14px; }
  .navbar__product { display: none; }
  .navbar__divider { display: none; }
  .adv-grid { grid-template-columns: repeat(2, 1fr); }
  .hero__inner { gap: 24px; }
}

@media (max-width: 900px) {
  .navbar__toggle { display: flex; }
  .navbar__menu {
    position: fixed;
    top: 76px;
    left: 0;
    right: 0;
    margin: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 2px;
    padding: 12px 20px 22px;
    background: rgba(255, 255, 255, .98);
    backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--line);
    box-shadow: 0 20px 30px -24px rgba(15, 23, 42, .5);
    transform: translateY(-12px);
    opacity: 0;
    visibility: hidden;
    transition: transform .3s var(--ease), opacity .3s var(--ease), visibility .3s var(--ease);
  }

  .navbar__menu.is-open { transform: translateY(0); opacity: 1; visibility: visible; }

  .nav-link { padding: 13px 12px; font-size: 15.5px; border-radius: 8px; }
  .nav-link.is-active { background: rgba(31, 95, 209, .07); }
  .nav-link.is-active::after { display: none; }
  .nav-link--external { padding-right: 12px; }
  .nav-link--external::before { position: static; margin-right: 4px; }

  .navbar__product { display: block; font-size: 13.5px; }
  .navbar__divider { display: block; height: 14px; }

  .hero { padding-top: 118px; }
  .hero__inner { grid-template-columns: 1fr; min-height: 0; padding-bottom: 48px; }
  .hero__visual { order: -1; margin-bottom: 0; }
  .orb { width: min(230px, 62%); }
  .hero__desc { margin-left: auto; margin-right: auto; }
  .hero__stats { grid-template-columns: repeat(2, 1fr); }
  .stat { padding: 20px 16px; border-bottom: 1px solid rgba(125, 180, 255, .1); }
  .stat:nth-child(2n) { border-right: 0; }

  .section { padding: 76px 0; }
  .section__head { margin-bottom: 44px; }
  .pain-grid, .cap-grid { grid-template-columns: repeat(2, 1fr); }
  .adv-grid { grid-template-columns: repeat(2, 1fr); }
  .steps { grid-template-columns: repeat(2, 1fr); gap: 34px 20px; }
  .steps::before { display: none; }
  .arch__layer { grid-template-columns: 1fr; gap: 10px; }
  .arch__label { flex-direction: row; align-items: baseline; justify-content: flex-start; gap: 8px; }
  .cta__box { padding: 38px 30px; }
  .footer__top { gap: 30px; }
  .footer__col--qr { text-align: left; }
  .footer__qr { margin: 0; }
}

@media (max-width: 620px) {
  .container, .navbar__inner, .hero__inner, .hero__stats, .footer__inner { padding-left: 20px; padding-right: 20px; }
  .navbar__inner { height: 66px; }
  .navbar__menu { top: 66px; }
  html { scroll-padding-top: 66px; }
  .navbar__logo img { height: 28px; }

  .hero { padding-top: 104px; }
  .hero__title { font-size: 34px; }
  .hero__slogan { letter-spacing: .14em; font-size: 15.5px; }
  .orb { width: 190px; }
  .hero__desc { font-size: 15px; line-height: 1.85; }
  .hero__actions .btn { flex: 1 1 auto; height: 46px; padding: 0 20px; }
  .hero__status { font-size: 12.5px; }

  .hero__stats { grid-template-columns: 1fr 1fr; }
  .stat__title { font-size: 15px; }
  .stat__desc { font-size: 12.5px; }

  .section { padding: 60px 0; }
  .section__title { font-size: 25px; }
  .section__desc { font-size: 15px; }

  .pain-card, .cap-card { padding: 26px 22px; }
  .pain-grid, .cap-grid { grid-template-columns: 1fr; }
  .adv-grid { grid-template-columns: 1fr; }
  .steps { grid-template-columns: 1fr; }
  .step { text-align: left; display: grid; grid-template-columns: 54px 1fr; column-gap: 16px; }
  .step__dot { margin: 0; grid-row: span 2; }
  .step h3 { margin-bottom: 4px; }

  .notice { padding: 22px 20px; flex-direction: column; gap: 14px; }
  .cta { padding-bottom: 60px; }
  .cta__box { padding: 32px 22px; }
  .cta__actions { width: 100%; }
  .cta__actions .btn { flex: 1 1 auto; }

  .footer { padding-top: 36px; }
  .footer__top { flex-direction: column; }
  .footer__bottom { flex-direction: column; text-align: center; }

  .back-top { right: 16px; bottom: 16px; width: 40px; height: 40px; }
}