/* 机器人界官网 · 静态样式（无外部依赖） */
:root {
  --bg: #060b16;
  --bg-soft: #0b1426;
  --surface: rgba(255, 255, 255, 0.045);
  --surface-strong: rgba(255, 255, 255, 0.075);
  --border: rgba(148, 178, 230, 0.16);
  --border-strong: rgba(148, 178, 230, 0.32);
  --text: #e9f0fb;
  --muted: #9bacc7;
  --brand: #2f7bff;
  --brand-bright: #4d9dff;
  --cyan: #39d5ff;
  --shadow: 0 24px 70px rgba(0, 0, 0, 0.45);
  --container: 1180px;
  --header-h: 72px;
  --radius: 20px;
  --font: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Source Han Sans SC",
    "Segoe UI", system-ui, -apple-system, sans-serif;
}

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

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

body {
  margin: 0;
  min-width: 320px;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -2;
  background:
    radial-gradient(900px 520px at 12% -8%, rgba(47, 123, 255, 0.22), transparent 62%),
    radial-gradient(760px 520px at 92% 8%, rgba(57, 213, 255, 0.13), transparent 60%),
    radial-gradient(900px 700px at 50% 108%, rgba(47, 123, 255, 0.1), transparent 62%),
    var(--bg);
}

body::after {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(148, 178, 230, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(148, 178, 230, 0.05) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: radial-gradient(ellipse 70% 60% at 50% 20%, #000 20%, transparent 80%);
  -webkit-mask-image: radial-gradient(ellipse 70% 60% at 50% 20%, #000 20%, transparent 80%);
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

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

button {
  font: inherit;
  color: inherit;
}

::selection {
  background: rgba(47, 123, 255, 0.45);
  color: #fff;
}

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

.skip-link {
  position: absolute;
  left: 16px;
  top: -80px;
  z-index: 200;
  padding: 10px 16px;
  border-radius: 10px;
  background: #fff;
  color: #0a1a35;
  font-weight: 700;
  transition: top 0.2s ease;
}

.skip-link:focus {
  top: 16px;
}

/* ---------- 顶部导航 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-h);
  border-bottom: 1px solid transparent;
  transition: background 0.25s ease, border-color 0.25s ease;
}

.site-header.is-scrolled {
  background: rgba(6, 11, 22, 0.82);
  border-bottom-color: var(--border);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
}

.nav {
  display: flex;
  align-items: center;
  gap: 32px;
  height: 100%;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  flex: 0 0 auto;
}

.brand img {
  width: 38px;
  height: 38px;
  border-radius: 11px;
  box-shadow: 0 0 0 1px rgba(255, 255, 255, 0.12), 0 6px 18px rgba(47, 123, 255, 0.25);
}

.brand-name {
  display: flex;
  flex-direction: column;
  line-height: 1.15;
}

.brand-name strong {
  font-size: 18px;
  letter-spacing: 0.06em;
}

.brand-name span {
  font-size: 10px;
  letter-spacing: 0.22em;
  color: var(--muted);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-left: auto;
  list-style: none;
  padding: 0;
}

.nav-links a {
  display: inline-block;
  padding: 8px 14px;
  border-radius: 999px;
  color: var(--muted);
  font-size: 14px;
  transition: color 0.2s ease, background 0.2s ease;
}

.nav-links a:hover,
.nav-links a:focus-visible {
  color: var(--text);
  background: var(--surface);
}

.nav-cta {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 18px;
  border: 1px solid var(--border-strong);
  border-radius: 999px;
  font-size: 13px;
  color: var(--text);
  background: linear-gradient(180deg, rgba(47, 123, 255, 0.18), rgba(47, 123, 255, 0.06));
  transition: border-color 0.2s ease, transform 0.2s ease;
}

.nav-cta:hover {
  border-color: var(--brand-bright);
  transform: translateY(-1px);
}

.nav-cta .dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: #42e6a4;
  box-shadow: 0 0 10px rgba(66, 230, 164, 0.9);
}

.nav-toggle {
  display: none;
  position: relative;
  margin-left: auto;
  width: 42px;
  height: 42px;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--surface);
  cursor: pointer;
}

.nav-toggle span,
.nav-toggle span::before,
.nav-toggle span::after {
  position: absolute;
  left: 50%;
  top: 50%;
  display: block;
  width: 18px;
  height: 2px;
  margin: 0;
  border-radius: 2px;
  background: var(--text);
  content: "";
  transition: transform 0.2s ease, background 0.2s ease;
}

.nav-toggle span {
  transform: translate(-50%, -50%);
}

.nav-toggle span::before {
  transform: translate(-50%, calc(-50% - 6px));
}

.nav-toggle span::after {
  transform: translate(-50%, calc(-50% + 6px));
}

.nav-toggle[aria-expanded="true"] span {
  background: transparent;
}

.nav-toggle[aria-expanded="true"] span::before {
  transform: translate(-50%, -50%) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] span::after {
  transform: translate(-50%, -50%) rotate(-45deg);
}

/* ---------- 通用区块 ---------- */
.section {
  padding: 96px 0;
}

.section-head {
  max-width: 720px;
  margin-bottom: 48px;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 18px;
  font-size: 12px;
  letter-spacing: 0.24em;
  color: var(--cyan);
  text-transform: uppercase;
}

.eyebrow::before {
  content: "";
  width: 26px;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--cyan));
}

h1,
h2,
h3 {
  margin: 0;
  line-height: 1.18;
  letter-spacing: -0.01em;
}

h2 {
  font-size: clamp(28px, 3.6vw, 42px);
  font-weight: 700;
}

.section-lead {
  margin: 18px 0 0;
  color: var(--muted);
  font-size: 16px;
}

.gradient-text {
  background: linear-gradient(100deg, #ffffff 8%, #9cc4ff 52%, #39d5ff 96%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

/* ---------- Hero ---------- */
.hero {
  position: relative;
  padding: 64px 0 72px;
}

.hero-inner {
  display: grid;
  grid-template-columns: minmax(0, 1.02fr) minmax(0, 0.98fr);
  align-items: center;
  gap: 56px;
}

.hero-copy h1 {
  margin: 6px 0 0;
  font-size: clamp(58px, 8vw, 96px);
  font-weight: 800;
  letter-spacing: 0.02em;
}

.hero-tagline {
  margin: 14px 0 0;
  font-size: clamp(20px, 2.4vw, 28px);
  font-weight: 600;
  color: #cfe1ff;
}

.hero-desc {
  max-width: 33em;
  margin: 20px 0 0;
  color: var(--muted);
  font-size: 16px;
}

.hero-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 28px 0 0;
  padding: 0;
  list-style: none;
}

.hero-tags li {
  padding: 6px 14px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--surface);
  color: #c6d6ee;
  font-size: 13px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 34px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  min-height: 48px;
  padding: 0 26px;
  border-radius: 999px;
  border: 1px solid transparent;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease,
    background 0.2s ease;
}

.btn-primary {
  background: linear-gradient(135deg, #2f7bff, #1a5ee0 58%, #2f9dff);
  color: #fff;
  box-shadow: 0 14px 34px rgba(47, 123, 255, 0.36);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 18px 42px rgba(47, 123, 255, 0.46);
}

.btn-ghost {
  border-color: var(--border-strong);
  background: var(--surface);
  color: var(--text);
}

.btn-ghost:hover {
  border-color: var(--brand-bright);
  background: var(--surface-strong);
  transform: translateY(-2px);
}

.btn svg {
  width: 17px;
  height: 17px;
}

.hero-note {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: 22px;
  color: #7f90ac;
  font-size: 13px;
}

.hero-note svg {
  width: 16px;
  height: 16px;
  flex: 0 0 auto;
  color: #42e6a4;
}

/* Hero 视觉 */
.hero-visual {
  position: relative;
  min-height: 520px;
}

.visual-halo {
  position: absolute;
  inset: 6% -8% 10% 4%;
  background: radial-gradient(closest-side, rgba(47, 123, 255, 0.36), transparent 72%);
  filter: blur(12px);
  border-radius: 50%;
}

.robot-card {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--border-strong);
  border-radius: 28px;
  background: linear-gradient(160deg, #16233d, #0a1122 62%);
  box-shadow: var(--shadow);
  aspect-ratio: 4 / 3.35;
}

.robot-card img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: 50% 38%;
  filter: saturate(0.82) contrast(1.05);
}

.robot-card::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(180deg, rgba(6, 11, 22, 0.05), transparent 45%, rgba(6, 11, 22, 0.6)),
    radial-gradient(60% 45% at 70% 8%, rgba(57, 213, 255, 0.16), transparent 70%);
  pointer-events: none;
}

.robot-card-label {
  position: absolute;
  left: 20px;
  top: 20px;
  z-index: 2;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 13px;
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 999px;
  background: rgba(6, 11, 22, 0.55);
  backdrop-filter: blur(10px);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: #bcd3f6;
}

.robot-card-label::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 8px var(--cyan);
}

.phone {
  position: absolute;
  left: -14px;
  bottom: -26px;
  z-index: 3;
  width: 198px;
  aspect-ratio: 9 / 19.2;
  padding: 8px;
  border-radius: 30px;
  background: linear-gradient(160deg, #2b3852, #0b1220);
  border: 1px solid rgba(255, 255, 255, 0.2);
  box-shadow: 0 30px 60px rgba(0, 0, 0, 0.6), 0 0 0 6px rgba(6, 11, 22, 0.55);
}

.phone-screen {
  width: 100%;
  height: 100%;
  border-radius: 23px;
  background-image: url("app-ui.png");
  background-size: 500% 100%;
  background-position: 0 0;
  background-repeat: no-repeat;
  background-color: #eef4fd;
}

.phone::before {
  content: "";
  position: absolute;
  left: 50%;
  top: 14px;
  width: 46px;
  height: 12px;
  transform: translateX(-50%);
  border-radius: 0 0 9px 9px;
  background: #0a1120;
  z-index: 2;
}

.float-chip {
  position: absolute;
  z-index: 4;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 11px 15px;
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: 14px;
  background: rgba(10, 18, 33, 0.78);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  box-shadow: 0 16px 36px rgba(0, 0, 0, 0.35);
  font-size: 12px;
  color: #d7e4f8;
}

.float-chip strong {
  display: block;
  font-size: 13px;
  color: #fff;
}

.float-chip small {
  display: block;
  font-size: 10px;
  color: #8ea3c2;
  letter-spacing: 0.12em;
}

.float-chip .chip-icon {
  display: grid;
  place-items: center;
  width: 30px;
  height: 30px;
  border-radius: 9px;
  background: linear-gradient(140deg, rgba(47, 123, 255, 0.32), rgba(57, 213, 255, 0.14));
  color: #8fc0ff;
}

.float-chip .chip-icon svg {
  width: 16px;
  height: 16px;
}

.chip-top {
  right: -18px;
  top: 42px;
}

.chip-bottom {
  right: 8px;
  bottom: 76px;
}

/* ---------- 能力条 ---------- */
.capability-strip {
  border-block: 1px solid var(--border);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.025), rgba(255, 255, 255, 0));
}

.capability-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--border);
}

.capability {
  padding: 26px 24px;
  background: var(--bg);
  display: flex;
  gap: 14px;
  align-items: flex-start;
}

.capability b {
  display: block;
  font-size: 15px;
}

.capability span {
  display: block;
  margin-top: 2px;
  color: var(--muted);
  font-size: 12.5px;
}

.capability .num {
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--brand-bright);
  padding-top: 4px;
}

/* ---------- 功能 ---------- */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.feature-card {
  position: relative;
  overflow: hidden;
  padding: 28px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: linear-gradient(170deg, rgba(255, 255, 255, 0.055), rgba(255, 255, 255, 0.018));
  transition: transform 0.25s ease, border-color 0.25s ease, background 0.25s ease;
}

.feature-card::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(400px 200px at 20% 0%, rgba(47, 123, 255, 0.16), transparent 70%);
  opacity: 0;
  transition: opacity 0.25s ease;
  pointer-events: none;
}

.feature-card:hover {
  transform: translateY(-4px);
  border-color: var(--border-strong);
}

.feature-card:hover::before {
  opacity: 1;
}

.feature-icon {
  display: grid;
  place-items: center;
  width: 46px;
  height: 46px;
  margin-bottom: 20px;
  border: 1px solid rgba(120, 175, 255, 0.28);
  border-radius: 13px;
  background: linear-gradient(150deg, rgba(47, 123, 255, 0.26), rgba(57, 213, 255, 0.08));
  color: #9cc6ff;
}

.feature-icon svg {
  width: 22px;
  height: 22px;
}

.feature-card h3 {
  font-size: 18px;
  font-weight: 650;
}

.feature-card h3 small {
  display: block;
  margin-bottom: 6px;
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 0.2em;
  color: #6f87ab;
}

.feature-card p {
  margin: 10px 0 0;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.75;
}

/* ---------- 应用界面 ---------- */
.app-section {
  position: relative;
}

.app-frame {
  position: relative;
  overflow: hidden;
  padding: 10px;
  border: 1px solid var(--border-strong);
  border-radius: 24px;
  background: linear-gradient(160deg, rgba(47, 123, 255, 0.18), rgba(255, 255, 255, 0.03) 45%);
  box-shadow: var(--shadow);
}

.app-frame-bar {
  display: flex;
  align-items: center;
  gap: 7px;
  padding: 3px 6px 11px;
}

.app-frame-bar i {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #3c4b66;
}

.app-frame-bar i:nth-child(2) {
  background: #36547a;
}

.app-frame-bar i:nth-child(3) {
  background: #2f6f9c;
}

.app-frame-bar span {
  margin-left: auto;
  color: #7b8fab;
  font-size: 11px;
  letter-spacing: 0.14em;
}

.app-shot {
  overflow: hidden;
  border-radius: 15px;
  background: #eef4fd;
}

.app-shot img {
  width: 100%;
  height: auto;
}

.app-labels {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 10px;
  margin: 18px 0 0;
  padding: 0;
  list-style: none;
}

.app-labels li {
  padding: 12px 14px;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--surface);
  font-size: 13px;
  color: #c3d3ea;
  text-align: center;
}

.app-labels li span {
  display: block;
  font-size: 10px;
  letter-spacing: 0.16em;
  color: #7488a6;
}

.app-caption {
  margin: 14px 2px 0;
  color: #71829d;
  font-size: 12px;
}

.gallery-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 8px 20px;
  margin: 40px 0 18px;
}

.gallery-head h3 {
  font-size: 18px;
  font-weight: 650;
}

.gallery-head span {
  color: #7f92ae;
  font-size: 12px;
}

.shot-gallery {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 14px;
}

.shot-card {
  display: block;
  padding: 6px;
  border: 1px solid var(--border);
  border-radius: 18px;
  background: linear-gradient(170deg, rgba(255, 255, 255, 0.07), rgba(255, 255, 255, 0.02));
  text-align: left;
  cursor: zoom-in;
  transition: transform 0.2s ease, border-color 0.2s ease;
}

.shot-card:hover {
  transform: translateY(-4px);
  border-color: var(--border-strong);
}

.shot-card img {
  width: 100%;
  aspect-ratio: 9 / 17;
  object-fit: cover;
  object-position: top center;
  border-radius: 13px;
  background: #eef4fd;
}

.shot-card--feed img {
  object-position: center 32%;
}

.shot-card b {
  display: block;
  padding: 10px 6px 2px;
  font-size: 12.5px;
  font-weight: 600;
  color: #d7e4f7;
}

.shot-card small {
  display: block;
  padding: 0 6px 6px;
  font-size: 10px;
  letter-spacing: 0.14em;
  color: #7c90ad;
}

/* 截图放大 */
.lightbox {
  position: fixed;
  inset: 0;
  z-index: 300;
  display: flex;
  flex-direction: column;
  align-items: center;
  overflow-y: auto;
  padding: 24px;
  background: rgba(3, 7, 14, 0.94);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}

.lightbox[hidden] {
  display: none;
}

.lightbox img {
  width: min(100%, 480px);
  height: auto;
  margin: 48px auto 0;
  border-radius: 16px;
  box-shadow: 0 30px 80px rgba(0, 0, 0, 0.6);
}

.lightbox-caption {
  margin: 16px 0 20px;
  color: #a9bad4;
  font-size: 13px;
}

.lightbox-close {
  position: fixed;
  top: 18px;
  right: 18px;
  z-index: 2;
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  border: 1px solid rgba(255, 255, 255, 0.22);
  border-radius: 50%;
  background: rgba(10, 18, 33, 0.8);
  color: #eaf1fb;
  font-size: 22px;
  line-height: 1;
  cursor: pointer;
}

.lightbox-close:hover {
  background: rgba(47, 123, 255, 0.4);
}

body.no-scroll {
  overflow: hidden;
}

.error-page {
  display: grid;
  place-content: center;
  min-height: 72vh;
  text-align: center;
  padding: 40px 0 80px;
}

.error-page h1 {
  margin: 10px 0 0;
  font-size: clamp(34px, 6vw, 56px);
}

.error-page .section-lead {
  margin-inline: auto;
  max-width: 32em;
}

.error-page .btn {
  justify-self: center;
  margin-top: 28px;
}

/* ---------- 关于 ---------- */
.about-inner {
  display: grid;
  grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.92fr);
  gap: 48px;
  align-items: start;
}

.company-list {
  margin: 32px 0 0;
  border-top: 1px solid var(--border);
}

.company-list div {
  display: grid;
  grid-template-columns: 128px minmax(0, 1fr);
  gap: 18px;
  padding: 15px 0;
  border-bottom: 1px solid var(--border);
}

.company-list dt {
  color: #7f91ad;
  font-size: 13px;
}

.company-list dd {
  margin: 0;
  color: #d4e0f1;
  font-size: 14px;
  word-break: break-word;
}

.company-list dd a {
  color: #8fc0ff;
  text-decoration: underline;
  text-underline-offset: 3px;
}

.about-visual {
  position: relative;
  overflow: hidden;
  min-height: 440px;
  border: 1px solid var(--border-strong);
  border-radius: 24px;
  background: #0a1122;
  box-shadow: var(--shadow);
}

.about-visual img {
  width: 100%;
  height: 100%;
  min-height: 440px;
  object-fit: cover;
  opacity: 0.9;
}

.about-visual::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(6, 11, 22, 0.15), rgba(6, 11, 22, 0.84) 86%);
}

.about-visual-copy {
  position: absolute;
  left: 26px;
  right: 26px;
  bottom: 24px;
  z-index: 2;
}

.about-visual-copy strong {
  display: block;
  font-size: 22px;
  letter-spacing: 0.08em;
}

.about-visual-copy span {
  display: block;
  margin-top: 4px;
  color: #9db4d6;
  font-size: 12px;
  letter-spacing: 0.18em;
}

.about-visual-badge {
  position: absolute;
  left: 26px;
  top: 24px;
  z-index: 2;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 13px;
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: 999px;
  background: rgba(6, 11, 22, 0.55);
  backdrop-filter: blur(10px);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: #c2d6f5;
}

.about-visual-badge img {
  width: 20px;
  height: 20px;
  min-height: 0;
  border-radius: 6px;
}

/* ---------- 协议 ---------- */
.legal-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.legal-card {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 26px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  transition: transform 0.2s ease, border-color 0.2s ease;
}

.legal-card:hover {
  transform: translateY(-3px);
  border-color: var(--brand-bright);
}

.legal-card b {
  font-size: 17px;
}

.legal-card span {
  color: var(--muted);
  font-size: 13px;
}

.legal-card em {
  margin-top: 10px;
  font-style: normal;
  font-size: 11px;
  letter-spacing: 0.12em;
  color: #7186a6;
}

/* ---------- 页脚 ---------- */
.site-footer {
  margin-top: 24px;
  padding: 56px 0 30px;
  border-top: 1px solid var(--border);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.02), rgba(0, 0, 0, 0.28));
}

.footer-top {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) repeat(3, minmax(0, 0.6fr));
  gap: 40px;
}

.footer-brand p {
  max-width: 30em;
  margin: 16px 0 0;
  color: var(--muted);
  font-size: 13px;
}

.footer-col h4 {
  margin: 4px 0 14px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: #cfdcf0;
}

.footer-col ul {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 9px;
}

.footer-col a {
  color: var(--muted);
  font-size: 13px;
}

.footer-col a:hover {
  color: var(--text);
}

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-top: 40px;
  padding-top: 22px;
  border-top: 1px solid var(--border);
  color: #7c8daa;
  font-size: 12px;
}

.footer-bottom a {
  color: #93a8c7;
}

.footer-bottom a:hover {
  color: var(--text);
}

.footer-legal {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
}

/* ---------- 法务页 ---------- */
.theme-light {
  background: #f5f8fd;
  color: #0d1830;
}

.theme-light::before {
  background:
    radial-gradient(900px 500px at 10% -10%, rgba(47, 123, 255, 0.1), transparent 62%),
    radial-gradient(700px 460px at 92% 0%, rgba(57, 213, 255, 0.08), transparent 60%),
    #f5f8fd;
}

.theme-light::after {
  background-image:
    linear-gradient(rgba(13, 24, 48, 0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(13, 24, 48, 0.045) 1px, transparent 1px);
}

.theme-light .site-header.is-scrolled {
  background: rgba(245, 248, 253, 0.88);
  border-bottom-color: #e0e7f2;
}

.theme-light .nav-links a {
  color: #53657f;
}

.theme-light .nav-links a:hover {
  color: #0d1830;
  background: #e9effa;
}

.theme-light .nav-cta {
  color: #12305f;
  border-color: #d3dfef;
  background: #fff;
}

.theme-light .nav-toggle {
  border-color: #dce5f2;
  background: #fff;
}

.theme-light .nav-toggle span,
.theme-light .nav-toggle span::before,
.theme-light .nav-toggle span::after {
  background: #0d1830;
}

.theme-light .brand-name span {
  color: #667a98;
}

.legal-page {
  padding: 56px 0 80px;
}

.legal-shell {
  display: grid;
  grid-template-columns: 240px minmax(0, 1fr);
  gap: 48px;
  align-items: start;
}

.legal-side {
  position: sticky;
  top: calc(var(--header-h) + 24px);
  padding: 22px;
  border: 1px solid #e0e8f4;
  border-radius: 18px;
  background: #fff;
  box-shadow: 0 14px 34px rgba(21, 48, 92, 0.06);
}

.legal-side h2 {
  font-size: 13px;
  letter-spacing: 0.12em;
  color: #64748b;
}

.legal-side nav {
  display: grid;
  gap: 4px;
  margin-top: 14px;
}

.legal-side a {
  padding: 9px 11px;
  border-radius: 9px;
  color: #475569;
  font-size: 13.5px;
}

.legal-side a:hover {
  background: #eef4ff;
  color: #1b62e8;
}

.legal-side a[aria-current="page"] {
  background: linear-gradient(135deg, #1b62e8, #2f8bff);
  color: #fff;
}

.legal-side .side-meta {
  margin-top: 18px;
  padding-top: 16px;
  border-top: 1px solid #e8eef8;
  color: #7b8ba4;
  font-size: 12px;
}

.legal-doc {
  padding: 46px 52px 52px;
  border: 1px solid #e2e9f4;
  border-radius: 22px;
  background: #fff;
  box-shadow: 0 20px 50px rgba(21, 48, 92, 0.07);
}

.legal-doc-head {
  padding-bottom: 26px;
  border-bottom: 1px solid #e8eef8;
}

.legal-doc-head .doc-kicker {
  margin: 0 0 10px;
  font-size: 11px;
  letter-spacing: 0.22em;
  color: #1b62e8;
}

.legal-doc-head h1 {
  font-size: clamp(28px, 3.4vw, 38px);
  color: #0b1730;
}

.doc-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 20px;
  margin-top: 14px;
  color: #7b8ba4;
  font-size: 12.5px;
}

.doc-intro {
  margin: 26px 0 0;
  padding: 18px 20px;
  border-left: 3px solid #1b62e8;
  border-radius: 0 10px 10px 0;
  background: #f3f7ff;
  color: #43536b;
  font-size: 14px;
}

.legal-body {
  margin-top: 12px;
  color: #33445c;
  font-size: 15px;
  line-height: 1.95;
}

.legal-body h2 {
  margin: 38px 0 12px;
  font-size: 19px;
  color: #0b1730;
  letter-spacing: 0;
}

.legal-body h3 {
  margin: 24px 0 8px;
  font-size: 16px;
  color: #16294a;
}

.legal-body p {
  margin: 10px 0;
}

.legal-body ul,
.legal-body ol {
  margin: 10px 0;
  padding-left: 1.4em;
}

.legal-body li {
  margin: 6px 0;
}

.legal-body a {
  color: #1b62e8;
  text-decoration: underline;
  text-underline-offset: 3px;
}

.legal-body strong {
  color: #0e1c35;
}

.legal-body table {
  width: 100%;
  margin: 16px 0;
  border-collapse: collapse;
  font-size: 13.5px;
}

.legal-body th,
.legal-body td {
  padding: 10px 12px;
  border: 1px solid #e3eaf5;
  text-align: left;
  vertical-align: top;
}

.legal-body th {
  background: #f4f8ff;
  color: #1c2f4f;
}

.legal-contact {
  margin-top: 34px;
  padding: 22px 24px;
  border: 1px solid #dfe8f6;
  border-radius: 14px;
  background: #f8fbff;
  font-size: 14px;
}

.legal-contact h2 {
  margin-top: 0;
}

.theme-light .site-footer {
  background: #0a1120;
  color: #c8d6ea;
  border-top-color: #1b2942;
}

.theme-light .footer-col a,
.theme-light .footer-brand p {
  color: #93a5c0;
}

.theme-light .footer-col a:hover {
  color: #fff;
}

.theme-light .footer-bottom {
  border-top-color: #1b2942;
  color: #7b8daa;
}

.theme-light .footer-bottom a {
  color: #9fb2ce;
}

/* ---------- 动效 ---------- */
.reveal {
  opacity: 1;
  transform: none;
}

html.js .reveal {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

html.js .reveal.in {
  opacity: 1;
  transform: none;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }

  .reveal,
  html.js .reveal {
    opacity: 1;
    transform: none;
  }
}

/* ---------- 响应式 ---------- */
@media (max-width: 1024px) {
  .hero-inner {
    grid-template-columns: 1fr;
    gap: 44px;
  }

  .hero-visual {
    max-width: 620px;
    min-height: 0;
    width: 100%;
  }

  .hero-copy {
    max-width: 720px;
  }

  .features-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .shot-gallery {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .capability-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .footer-top {
    grid-template-columns: 1fr 1fr;
    row-gap: 34px;
  }

  .about-inner {
    grid-template-columns: 1fr;
  }

  .about-visual,
  .about-visual img {
    min-height: 360px;
  }

  .legal-shell {
    grid-template-columns: 1fr;
    gap: 26px;
  }

  .legal-side {
    position: static;
  }

  .legal-side nav {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .legal-side .side-meta {
    display: none;
  }
}

@media (max-width: 860px) {
  .nav-links,
  .nav-cta {
    display: none;
  }

  .nav-toggle {
    display: block;
  }

  .site-header.nav-open .nav-links {
    position: absolute;
    left: 24px;
    right: 24px;
    top: calc(var(--header-h) - 4px);
    display: grid;
    gap: 4px;
    margin: 0;
    padding: 12px;
    border: 1px solid var(--border);
    border-radius: 16px;
    background: #080f1c;
    box-shadow: var(--shadow);
  }

  .site-header.nav-open .nav-links a {
    padding: 12px 14px;
    border-radius: 10px;
  }

  .theme-light .site-header.nav-open .nav-links {
    border-color: #dce5f2;
    background: #fff;
  }

  .section {
    padding: 72px 0;
  }

  .hero {
    padding: 40px 0 56px;
  }

  .phone {
    width: 150px;
    left: 6px;
    bottom: -20px;
  }

  .float-chip {
    display: none;
  }

  .legal-doc {
    padding: 32px 24px 38px;
  }
}

@media (max-width: 640px) {
  .container {
    width: min(100% - 36px, var(--container));
  }

  .brand-name span {
    display: none;
  }

  .hero-copy h1 {
    font-size: 56px;
  }

  .hero-tagline {
    font-size: 19px;
  }

  .hero-tags li {
    font-size: 12px;
    padding: 5px 11px;
  }

  .btn {
    width: 100%;
  }

  .hero-actions {
    gap: 10px;
  }

  .features-grid,
  .legal-grid {
    grid-template-columns: 1fr;
  }

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

  .capability {
    padding: 18px 20px;
  }

  .app-labels {
    grid-template-columns: repeat(2, 1fr);
  }

  .app-labels li:last-child {
    grid-column: span 2;
  }

  .shot-gallery {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .lightbox {
    padding: 14px;
  }

  .lightbox img {
    margin-top: 62px;
  }

  .company-list div {
    grid-template-columns: 1fr;
    gap: 2px;
  }

  .company-list dt {
    font-size: 12px;
  }

  .footer-top {
    grid-template-columns: 1fr;
  }

  .footer-bottom {
    flex-direction: column;
    align-items: flex-start;
  }

  .legal-side nav {
    grid-template-columns: 1fr;
  }

  .legal-body {
    font-size: 14.5px;
  }

  .legal-doc-head h1 {
    font-size: 27px;
  }
}