:root {
  --bg: #0f1020;
  --bg-soft: #16172b;
  --bg-card: rgba(255, 255, 255, 0.06);
  --bg-card-solid: #1c1d33;
  --text: #eef0ff;
  --text-soft: #b6b9d6;
  --text-dim: #8b8fb0;
  --brand: #ff5c8a;
  --brand-2: #7b5cff;
  --brand-3: #22d3ee;
  --accent: #ffb84d;
  --line: rgba(255, 255, 255, 0.1);
  --line-strong: rgba(255, 255, 255, 0.18);
  --shadow: 0 18px 50px rgba(0, 0, 0, 0.45);
  --shadow-soft: 0 8px 24px rgba(0, 0, 0, 0.28);
  --radius: 20px;
  --radius-sm: 12px;
  --radius-pill: 999px;
  --header-h: 72px;
  --maxw: 1180px;
  --grad-hero: linear-gradient(135deg, #2b1055 0%, #7b2cbf 35%, #ff5c8a 70%, #ffb84d 100%);
  --grad-brand: linear-gradient(135deg, var(--brand-2), var(--brand));
  --grad-line: linear-gradient(90deg, transparent, var(--brand), var(--brand-3), transparent);
  --glass-blur: saturate(160%) blur(18px);
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

body.light-mode {
  --bg: #f5f6fc;
  --bg-soft: #ffffff;
  --bg-card: rgba(255, 255, 255, 0.72);
  --bg-card-solid: #ffffff;
  --text: #1a1b2e;
  --text-soft: #4a4d6a;
  --text-dim: #71759a;
  --brand: #e83e73;
  --brand-2: #6a4cff;
  --brand-3: #0ea5c6;
  --accent: #d98a1f;
  --line: rgba(20, 22, 50, 0.1);
  --line-strong: rgba(20, 22, 50, 0.18);
  --shadow: 0 18px 50px rgba(60, 60, 120, 0.16);
  --shadow-soft: 0 8px 24px rgba(60, 60, 120, 0.1);
  --grad-hero: linear-gradient(135deg, #e9e4ff 0%, #ffd9e6 45%, #ffe9c7 100%);
}

*,
*::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;
  font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  font-size: 16px;
  line-height: 1.75;
  color: var(--text);
  background: var(--bg);
  background-image:
    radial-gradient(900px 500px at 12% -8%, rgba(123, 92, 255, 0.28), transparent 60%),
    radial-gradient(800px 460px at 92% 2%, rgba(255, 92, 138, 0.22), transparent 62%),
    radial-gradient(700px 420px at 50% 100%, rgba(34, 211, 238, 0.12), transparent 60%);
  background-attachment: fixed;
  overflow-x: hidden;
  transition: background-color 0.4s var(--ease), color 0.4s var(--ease);
}

body.light-mode {
  background-image:
    radial-gradient(900px 500px at 12% -8%, rgba(123, 92, 255, 0.16), transparent 60%),
    radial-gradient(800px 460px at 92% 2%, rgba(255, 92, 138, 0.14), transparent 62%),
    radial-gradient(700px 420px at 50% 100%, rgba(34, 211, 238, 0.1), transparent 60%);
}

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

a {
  color: var(--brand-3);
  text-decoration: none;
  transition: color 0.25s var(--ease), opacity 0.25s var(--ease);
}

a:hover,
a:focus-visible {
  color: var(--brand);
}

h1, h2, h3, h4 {
  line-height: 1.3;
  margin: 0 0 0.6em;
  font-weight: 800;
  letter-spacing: -0.01em;
}

h1 {
  font-size: clamp(1.75rem, 4.2vw, 2.9rem);
  background: var(--grad-brand);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

h2 {
  font-size: clamp(1.4rem, 2.8vw, 2rem);
  position: relative;
}

h3 {
  font-size: clamp(1.1rem, 1.8vw, 1.3rem);
}

h4 {
  font-size: 1rem;
  color: var(--brand-3);
  margin-top: 1.2em;
}

p {
  margin: 0 0 1em;
  color: var(--text-soft);
}

ul, ol {
  margin: 0 0 1em;
  padding-left: 1.3em;
  color: var(--text-soft);
}

li {
  margin-bottom: 0.45em;
}

strong {
  color: var(--text);
}

blockquote {
  margin: 1.5em 0 0;
  padding: 1.2em 1.4em;
  border-left: 4px solid var(--brand);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  background: var(--bg-card);
  -webkit-backdrop-filter: var(--glass-blur);
  backdrop-filter: var(--glass-blur);
  box-shadow: var(--shadow-soft);
}

blockquote p {
  margin: 0 0 0.6em;
  font-style: italic;
}

blockquote p:last-child {
  margin-bottom: 0;
}

time {
  font-variant-numeric: tabular-nums;
  color: var(--text-dim);
  font-size: 0.85em;
}

:focus-visible {
  outline: 2px solid var(--brand-3);
  outline-offset: 3px;
  border-radius: 4px;
}

.visually-hidden {
  position: absolute !important;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: fixed;
  top: -100px;
  left: 16px;
  z-index: 999;
  padding: 0.7em 1.2em;
  border-radius: var(--radius-pill);
  background: var(--grad-brand);
  color: #fff;
  font-weight: 700;
  box-shadow: var(--shadow);
  transition: top 0.3s var(--ease);
}

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

/* ============ 头部 ============ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-h);
  background: rgba(15, 16, 32, 0.62);
  -webkit-backdrop-filter: var(--glass-blur);
  backdrop-filter: var(--glass-blur);
  border-bottom: 1px solid var(--line);
  transition: background 0.4s var(--ease), box-shadow 0.4s var(--ease), border-color 0.4s var(--ease);
}

body.light-mode .site-header {
  background: rgba(255, 255, 255, 0.7);
}

.site-header.is-scrolled {
  box-shadow: var(--shadow-soft);
  border-bottom-color: var(--line-strong);
}

.header-inner {
  max-width: var(--maxw);
  height: 100%;
  margin: 0 auto;
  padding: 0 20px;
  display: flex;
  align-items: center;
  gap: 18px;
}

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

.brand-logo {
  width: 42px;
  height: 42px;
  display: grid;
  place-items: center;
  border-radius: 14px;
  background: var(--grad-brand);
  color: #fff;
  font-weight: 900;
  font-size: 1.15rem;
  box-shadow: 0 8px 20px rgba(255, 92, 138, 0.35);
  transition: transform 0.4s var(--ease), box-shadow 0.4s var(--ease);
}

.brand:hover .brand-logo {
  transform: rotate(-8deg) scale(1.06);
  box-shadow: 0 12px 28px rgba(255, 92, 138, 0.5);
}

.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.25;
}

.brand-text strong {
  font-size: 1.02rem;
  letter-spacing: 0.02em;
  color: var(--text);
}

.brand-text em {
  font-style: normal;
  font-size: 0.72rem;
  color: var(--text-dim);
}

.main-nav {
  flex: 1;
  min-width: 0;
}

.main-nav ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 2px 4px;
}

.main-nav li {
  margin: 0;
}

.main-nav a {
  display: inline-block;
  padding: 6px 11px;
  border-radius: var(--radius-pill);
  font-size: 0.86rem;
  font-weight: 600;
  color: var(--text-soft);
  position: relative;
  transition: color 0.25s var(--ease), background 0.25s var(--ease), transform 0.25s var(--ease);
}

.main-nav a::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: 2px;
  width: 0;
  height: 2px;
  border-radius: 2px;
  background: var(--grad-brand);
  transform: translateX(-50%);
  transition: width 0.3s var(--ease);
}

.main-nav a:hover,
.main-nav a:focus-visible {
  color: var(--text);
  background: var(--bg-card);
  transform: translateY(-1px);
}

.main-nav a:hover::after {
  width: 60%;
}

.header-tools {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}

.site-search {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 4px 4px 4px 14px;
  border-radius: var(--radius-pill);
  background: var(--bg-card);
  border: 1px solid var(--line);
  -webkit-backdrop-filter: var(--glass-blur);
  backdrop-filter: var(--glass-blur);
  transition: border-color 0.3s var(--ease), box-shadow 0.3s var(--ease);
}

.site-search:focus-within {
  border-color: var(--brand);
  box-shadow: 0 0 0 3px rgba(255, 92, 138, 0.18);
}

.site-search input {
  width: 150px;
  padding: 6px 0;
  border: 0;
  background: transparent;
  color: var(--text);
  font-size: 0.85rem;
  font-family: inherit;
  outline: none;
  transition: width 0.35s var(--ease);
}

.site-search input::placeholder {
  color: var(--text-dim);
}

.site-search input:focus {
  width: 190px;
}

.site-search button {
  padding: 6px 14px;
  border: 0;
  border-radius: var(--radius-pill);
  background: var(--grad-brand);
  color: #fff;
  font-size: 0.82rem;
  font-weight: 700;
  font-family: inherit;
  cursor: pointer;
  transition: transform 0.25s var(--ease), box-shadow 0.25s var(--ease), opacity 0.25s var(--ease);
}

.site-search button:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 16px rgba(255, 92, 138, 0.4);
}

.theme-toggle,
.menu-toggle {
  padding: 8px 14px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--line);
  background: var(--bg-card);
  color: var(--text-soft);
  font-size: 0.82rem;
  font-weight: 700;
  font-family: inherit;
  cursor: pointer;
  white-space: nowrap;
  -webkit-backdrop-filter: var(--glass-blur);
  backdrop-filter: var(--glass-blur);
  transition: color 0.25s var(--ease), border-color 0.25s var(--ease), transform 0.25s var(--ease), background 0.25s var(--ease);
}

.theme-toggle:hover,
.menu-toggle:hover {
  color: var(--text);
  border-color: var(--brand);
  transform: translateY(-1px);
}

.menu-toggle {
  display: none;
}

/* ============ 首屏 ============ */
.hero {
  position: relative;
  max-width: var(--maxw);
  margin: 28px auto 0;
  padding: 0 20px;
}

.hero-slides {
  position: relative;
  border-radius: calc(var(--radius) + 8px);
  overflow: hidden;
  background: var(--grad-hero);
  box-shadow: var(--shadow);
  isolation: isolate;
}

.hero-slides::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(600px 300px at 80% 10%, rgba(255, 255, 255, 0.28), transparent 60%),
    radial-gradient(500px 260px at 10% 90%, rgba(255, 255, 255, 0.16), transparent 60%);
  pointer-events: none;
  z-index: 0;
}

.hero-slides::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(10, 8, 25, 0.18), rgba(10, 8, 25, 0.55));
  pointer-events: none;
  z-index: 0;
}

body.light-mode .hero-slides::after {
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.05), rgba(255, 255, 255, 0.35));
}

.hero-slide {
  position: relative;
  z-index: 1;
  padding: clamp(28px, 5vw, 64px);
  min-height: 320px;
  display: none;
  color: #fff;
  animation: heroIn 0.6s var(--ease) both;
}

.hero-slide.is-active {
  display: block;
}

@keyframes heroIn {
  from {
    opacity: 0;
    transform: translateY(16px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

body.light-mode .hero-slide {
  color: #1a1b2e;
}

.hero-slide h1,
.hero-slide h2 {
  color: #fff;
  -webkit-text-fill-color: #fff;
  background: none;
  text-shadow: 0 4px 24px rgba(0, 0, 0, 0.35);
  max-width: 22ch;
}

body.light-mode .hero-slide h1,
body.light-mode .hero-slide h2 {
  color: #1a1b2e;
  -webkit-text-fill-color: #1a1b2e;
  text-shadow: none;
}

.hero-slide p {
  max-width: 62ch;
  color: rgba(255, 255, 255, 0.92);
}

body.light-mode .hero-slide p {
  color: #33365a;
}

.hero-lead {
  font-size: clamp(0.95rem, 1.6vw, 1.05rem);
}

.hero-answer {
  padding: 14px 18px;
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.14);
  border: 1px solid rgba(255, 255, 255, 0.24);
  -webkit-backdrop-filter: var(--glass-blur);
  backdrop-filter: var(--glass-blur);
}

body.light-mode .hero-answer {
  background: rgba(255, 255, 255, 0.6);
  border-color: rgba(20, 22, 50, 0.12);
}

.hero-answer strong {
  color: #fff;
}

body.light-mode .hero-answer strong {
  color: #1a1b2e;
}

.hero-cta {
  display: inline-block;
  margin-top: 6px;
  padding: 12px 30px;
  border-radius: var(--radius-pill);
  background: #fff;
  color: #2b1055;
  font-weight: 800;
  box-shadow: 0 10px 26px rgba(0, 0, 0, 0.24);
  transition: transform 0.3s var(--ease), box-shadow 0.3s var(--ease), background 0.3s var(--ease);
}

.hero-cta:hover,
.hero-cta:focus-visible {
  transform: translateY(-3px);
  box-shadow: 0 16px 34px rgba(0, 0, 0, 0.32);
  background: var(--accent);
  color: #2b1055;
}

.hero-controls {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 14px;
  margin-top: 18px;
}

.hero-prev,
.hero-next {
  padding: 8px 18px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--line);
  background: var(--bg-card);
  color: var(--text-soft);
  font-size: 0.82rem;
  font-weight: 700;
  font-family: inherit;
  cursor: pointer;
  -webkit-backdrop-filter: var(--glass-blur);
  backdrop-filter: var(--glass-blur);
  transition: color 0.25s var(--ease), border-color 0.25s var(--ease), transform 0.25s var(--ease);
}

.hero-prev:hover,
.hero-next:hover {
  color: var(--text);
  border-color: var(--brand);
  transform: translateY(-1px);
}

.hero-dots {
  display: flex;
  gap: 8px;
}

.hero-dots button {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  border: 1px solid var(--line);
  background: var(--bg-card);
  color: var(--text-dim);
  font-size: 0.8rem;
  font-weight: 700;
  font-family: inherit;
  cursor: pointer;
  transition: all 0.3s var(--ease);
}

.hero-dots button[aria-selected="true"] {
  background: var(--grad-brand);
  border-color: transparent;
  color: #fff;
  box-shadow: 0 6px 16px rgba(255, 92, 138, 0.42);
  transform: scale(1.08);
}

/* ============ 数据统计 ============ */
.stats {
  max-width: var(--maxw);
  margin: 26px auto 0;
  padding: 0 20px;
}

.stats h2 {
  text-align: center;
  font-size: 1rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--text-dim);
  margin-bottom: 16px;
}

.stat-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
}

.stat-list li {
  margin: 0;
  padding: 22px 16px;
  text-align: center;
  border-radius: var(--radius);
  background: var(--bg-card);
  border: 1px solid var(--line);
  -webkit-backdrop-filter: var(--glass-blur);
  backdrop-filter: var(--glass-blur);
  box-shadow: var(--shadow-soft);
  transition: transform 0.35s var(--ease), border-color 0.35s var(--ease), box-shadow 0.35s var(--ease);
}

.stat-list li:hover {
  transform: translateY(-5px);
  border-color: var(--brand);
  box-shadow: var(--shadow);
}

.stat-num {
  display: block;
  font-size: clamp(1.5rem, 3vw, 2.1rem);
  font-weight: 900;
  font-variant-numeric: tabular-nums;
  background: var(--grad-brand);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  line-height: 1.2;
}

.stat-label {
  display: block;
  margin-top: 6px;
  font-size: 0.82rem;
  color: var(--text-dim);
}

/* ============ 面包屑 ============ */
.breadcrumb {
  max-width: var(--maxw);
  margin: 26px auto 0;
  padding: 0 20px;
}

.breadcrumb ol {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  color: var(--text-dim);
}

.breadcrumb li {
  margin: 0;
  display: flex;
  align-items: center;
  gap: 8px;
}

.breadcrumb li + li::before {
  content: "/";
  color: var(--text-dim);
  opacity: 0.6;
}

.breadcrumb a {
  color: var(--text-soft);
}

.breadcrumb a:hover {
  color: var(--brand);
}

.breadcrumb [aria-current="page"] {
  color: var(--brand);
  font-weight: 700;
}

/* ============ 通用区块 ============ */
.section {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: clamp(40px, 6vw, 72px) 20px 0;
  scroll-margin-top: calc(var(--header-h) + 16px);
}

.section > h2 {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 0.9em;
}

.section > h2::before {
  content: "";
  width: 6px;
  height: 1.1em;
  border-radius: 3px;
  background: var(--grad-brand);
  flex-shrink: 0;
  box-shadow: 0 0 16px rgba(255, 92, 138, 0.6);
}

.section > h2::after {
  content: "";
  flex: 1;
  height: 1px;
  background: var(--grad-line);
  opacity: 0.5;
}

.section-intro {
  max-width: 74ch;
  font-size: 1rem;
  color: var(--text-soft);
  margin-bottom: 1.6em;
}

/* 滚动动画 */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.7s var(--ease), transform 0.7s var(--ease);
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
  .reveal {
    opacity: 1;
    transform: none;
  }
}

/* ============ 品牌介绍 ============ */
.about-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.about-grid > article {
  padding: 26px;
  border-radius: var(--radius);
  background: var(--bg-card);
  border: 1px solid var(--line);
  -webkit-backdrop-filter: var(--glass-blur);
  backdrop-filter: var(--glass-blur);
  box-shadow: var(--shadow-soft);
  transition: transform 0.35s var(--ease), border-color 0.35s var(--ease), box-shadow 0.35s var(--ease);
}

.about-grid > article:hover {
  transform: translateY(-5px);
  border-color: var(--line-strong);
  box-shadow: var(--shadow);
}

.about-brand {
  grid-row: span 2;
}

.about-grid h3 {
  color: var(--text);
  padding-bottom: 0.5em;
  border-bottom: 1px solid var(--line);
}

.timeline {
  list-style: none;
  margin: 0;
  padding: 0;
  position: relative;
}

.timeline::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  border-radius: 2px;
  background: linear-gradient(180deg, var(--brand), var(--brand-3), transparent);
}

.timeline li {
  position: relative;
  margin: 0 0 14px;
  padding-left: 26px;
  font-size: 0.92rem;
}

.timeline li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 8px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--bg-soft);
  border: 2px solid var(--brand);
  box-shadow: 0 0 10px rgba(255, 92, 138, 0.6);
  transition: transform 0.3s var(--ease), background 0.3s var(--ease);
}

.timeline li:hover::before {
  transform: scale(1.25);
  background: var(--brand);
}

.timeline strong {
  color: var(--brand-3);
  margin-right: 4px;
}

/* ============ 产品卡片 ============ */
.product-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 20px;
}

.product-card {
  position: relative;
  padding: 26px;
  border-radius: var(--radius);
  background: var(--bg-card);
  border: 1px solid var(--line);
  -webkit-backdrop-filter: var(--glass-blur);
  backdrop-filter: var(--glass-blur);
  box-shadow: var(--shadow-soft);
  overflow: hidden;
  transition: transform 0.35s var(--ease), border-color 0.35s var(--ease), box-shadow 0.35s var(--ease);
}

.product-card::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 3px;
  background: var(--grad-brand);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.4s var(--ease);
}

.product-card:hover {
  transform: translateY(-6px);
  border-color: var(--line-strong);
  box-shadow: var(--shadow);
}

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

.product-card h3 {
  color: var(--text);
}

.product-card h4 {
  margin-top: 1.1em;
  font-size: 0.82rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--brand);
}

.product-card ul {
  padding-left: 1.1em;
  font-size: 0.92rem;
}

.product-card ul li::marker {
  color: var(--brand-3);
}

/* ============ 解决方案 ============ */
.solution-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 18px;
  margin-bottom: 1.5em;
}

.solution-item {
  padding: 24px;
  border-radius: var(--radius);
  background: var(--bg-card);
  border: 1px solid var(--line);
  border-left: 4px solid var(--brand-2);
  -webkit-backdrop-filter: var(--glass-blur);
  backdrop-filter: var(--glass-blur);
  box-shadow: var(--shadow-soft);
  transition: transform 0.35s var(--ease), border-color 0.35s var(--ease), box-shadow 0.35s var(--ease);
}

.solution-item:hover {
  transform: translateX(4px);
  border-left-color: var(--brand);
  box-shadow: var(--shadow);
}

.solution-item h3 {
  font-size: 1.05rem;
  color: var(--text);
}

.solution-item p {
  font-size: 0.94rem;
  margin-bottom: 0;
}

#solutions > h3 {
  margin-top: 1.4em;
  color: var(--text);
}

/* ============ 应用场景 ============ */
.application-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 18px;
}

.application-grid article {
  padding: 24px;
  border-radius: var(--radius);
  background: linear-gradient(160deg, var(--bg-card), transparent);
  border: 1px solid var(--line);
  -webkit-backdrop-filter: var(--glass-blur);
  backdrop-filter: var(--glass-blur);
  box-shadow: var(--shadow-soft);
  transition: transform 0.35s var(--ease), border-color 0.35s var(--ease);
}

.application-grid article:hover {
  transform: translateY(-5px);
  border-color: var(--brand-3);
}

.application-grid h3 {
  font-size: 1.02rem;
  color: var(--brand-3);
}

.application-grid p {
  font-size: 0.92rem;
  margin-bottom: 0;
}

/* ============ 客户案例 ============ */
.case-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 18px;
  margin-bottom: 1.6em;
}

.case-item {
  padding: 24px;
  border-radius: var(--radius);
  background: var(--bg-card);
  border: 1px solid var(--line);
  -webkit-backdrop-filter: var(--glass-blur);
  backdrop-filter: var(--glass-blur);
  box-shadow: var(--shadow-soft);
  transition: transform 0.35s var(--ease), box-shadow 0.35s var(--ease);
}

.case-item:hover {
  transform: translateY(-5px) scale(1.01);
  box-shadow: var(--shadow);
}

.case-item h3 {
  font-size: 1.02rem;
  color: var(--text);
}

.case-item p {
  font-size: 0.92rem;
  margin-bottom: 0;
}

#cases > h3 {
  color: var(--text);
}

/* ============ 新闻 ============ */
.news-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.news-list li {
  position: relative;
  margin: 0;
  padding: 20px 22px 20px 26px;
  border-radius: var(--radius-sm);
  background: var(--bg-card);
  border: 1px solid var(--line);
  -webkit-backdrop-filter: var(--glass-blur);
  backdrop-filter: var(--glass-blur);
  box-shadow: var(--shadow-soft);
  transition: transform 0.3s var(--ease), border-color 0.3s var(--ease);
}

.news-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 18px;
  bottom: 18px;
  width: 3px;
  border-radius: 0 3px 3px 0;
  background: var(--grad-brand);
  opacity: 0;
  transition: opacity 0.3s var(--ease);
}

.news-list li:hover {
  transform: translateX(4px);
  border-color: var(--line-strong);
}

.news-list li:hover::before {
  opacity: 1;
}

.news-list h3 {
  font-size: 1rem;
  margin: 4px 0 6px;
}

.news-list h3 a {
  color: var(--text);
}

.news-list h3 a:hover {
  color: var(--brand);
}

.news-list p {
  margin: 0;
  font-size: 0.9rem;
}

/* ============ 文章 ============ */
.article-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 18px;
}

.article-card {
  display: flex;
  flex-direction: column;
  padding: 24px;
  border-radius: var(--radius);
  background: var(--bg-card);
  border: 1px solid var(--line);
  -webkit-backdrop-filter: var(--glass-blur);
  backdrop-filter: var(--glass-blur);
  box-shadow: var(--shadow-soft);
  transition: transform 0.35s var(--ease), border-color 0.35s var(--ease), box-shadow 0.35s var(--ease);
}

.article-card:hover {
  transform: translateY(-6px);
  border-color: var(--brand);
  box-shadow: var(--shadow);
}

.article-card h3 {
  font-size: 1.05rem;
  margin-bottom: 0.4em;
}

.article-card h3 a {
  color: var(--text);
}

.article-card h3 a:hover {
  color: var(--brand);
}

.article-meta {
  font-size: 0.8rem;
  color: var(--text-dim);
  margin-bottom: 0.8em;
}

.article-summary {
  font-size: 0.92rem;
  flex: 1;
}

.read-more {
  align-self: flex-start;
  margin-top: 0.4em;
  padding: 7px 18px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--line-strong);
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--brand-3);
  transition: all 0.3s var(--ease);
}

.read-more:hover,
.read-more:focus-visible {
  background: var(--grad-brand);
  border-color: transparent;
  color: #fff;
  transform: translateX(3px);
}

/* ============ FAQ ============ */
.faq-list {
  display: grid;
  gap: 12px;
}

.faq-item {
  border-radius: var(--radius-sm);
  background: var(--bg-card);
  border: 1px solid var(--line);
  -webkit-backdrop-filter: var(--glass-blur);
  backdrop-filter: var(--glass-blur);
  box-shadow: var(--shadow-soft);
  overflow: hidden;
  transition: border-color 0.3s var(--ease), box-shadow 0.3s var(--ease);
}

.faq-item[open] {
  border-color: var(--brand);
  box-shadow: var(--shadow);
}

.faq-item summary {
  position: relative;
  padding: 16px 52px 16px 20px;
  cursor: pointer;
  list-style: none;
  transition: background 0.3s var(--ease);
}

.faq-item summary::-webkit-details-marker {
  display: none;
}

.faq-item summary:hover {
  background: rgba(255, 255, 255, 0.04);
}

body.light-mode .faq-item summary:hover {
  background: rgba(20, 22, 50, 0.03);
}

.faq-item summary h3 {
  display: inline;
  margin: 0;
  font-size: 0.98rem;
  font-weight: 700;
  color: var(--text);
}

.faq-item summary::after {
  content: "+";
  position: absolute;
  right: 18px;
  top: 50%;
  transform: translateY(-50%);
  width: 26px;
  height: 26px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: var(--bg-card);
  border: 1px solid var(--line);
  color: var(--brand);
  font-size: 1.1rem;
  font-weight: 700;
  line-height: 1;
  transition: transform 0.35s var(--ease), background 0.35s var(--ease), color 0.35s var(--ease);
}

.faq-item[open] summary::after {
  content: "−";
  transform: translateY(-50%) rotate(180deg);
  background: var(--grad-brand);
  color: #fff;
  border-color: transparent;
}

.faq-item > p {
  margin: 0;
  padding: 0 20px 20px;
  font-size: 0.93rem;
  color: var(--text-soft);
  animation: faqIn 0.35s var(--ease) both;
}

@keyframes faqIn {
  from {
    opacity: 0;
    transform: translateY(-6px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ============ 教程 ============ */
.howto-block {
  padding: 22px 24px;
  margin-bottom: 14px;
  border-radius: var(--radius);
  background: var(--bg-card);
  border: 1px solid var(--line);
  -webkit-backdrop-filter: var(--glass-blur);
  backdrop-filter: var(--glass-blur);
  box-shadow: var(--shadow-soft);
  transition: border-color 0.3s var(--ease), transform 0.3s var(--ease);
}

.howto-block:hover {
  border-color: var(--line-strong);
  transform: translateY(-2px);
}

.howto-block h3 {
  font-size: 1rem;
  color: var(--brand-3);
  margin-bottom: 0.5em;
}

.howto-block ol,
.howto-block ul {
  margin-bottom: 0;
}

.howto-block p:last-child {
  margin-bottom: 0;
}

.howto-block ol {
  counter-reset: step;
  list-style: none;
  padding-left: 0;
}

.howto-block ol li {
  position: relative;
  padding-left: 42px;
  margin-bottom: 12px;
  counter-increment: step;
}

.howto-block ol li::before {
  content: counter(step);
  position: absolute;
  left: 0;
  top: 2px;
  width: 26px;
  height: 26px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: var(--grad-brand);
  color: #fff;
  font-size: 0.78rem;
  font-weight: 800;
  box-shadow: 0 4px 12px rgba(255, 92, 138, 0.35);
}

/* ============ 行业知识 ============ */
.knowledge-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 18px;
}

.knowledge-grid article {
  padding: 24px;
  border-radius: var(--radius);
  background: linear-gradient(160deg, var(--bg-card), transparent);
  border: 1px solid var(--line);
  -webkit-backdrop-filter: var(--glass-blur);
  backdrop-filter: var(--glass-blur);
  box-shadow: var(--shadow-soft);
  transition: transform 0.35s var(--ease), border-color 0.35s var(--ease);
}

.knowledge-grid article:hover {
  transform: translateY(-5px);
  border-color: var(--brand);
}

.knowledge-grid h3 {
  font-size: 1rem;
  color: var(--text);
}

.knowledge-grid p {
  font-size: 0.92rem;
  margin-bottom: 0;
}

/* ============ 联系 ============ */
.contact-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 18px;
}

.contact-grid article {
  padding: 24px;
  border-radius: var(--radius);
  background: var(--bg-card);
  border: 1px solid var(--line);
  -webkit-backdrop-filter: var(--glass-blur);
  backdrop-filter: var(--glass-blur);
  box-shadow: var(--shadow-soft);
  transition: transform 0.35s var(--ease), border-color 0.35s var(--ease);
}

.contact-grid article:hover {
  transform: translateY(-5px);
  border-color: var(--brand-3);
}

.contact-grid h3 {
  font-size: 1rem;
  color: var(--brand-3);
}

.contact-grid p {
  font-size: 0.92rem;
  margin-bottom: 0;
  word-break: break-word;
}

/* ============ 站点地图 & 友链 ============ */
.sitemap-list,
.friend-links {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.sitemap-list li,
.friend-links li {
  margin: 0;
}

.sitemap-list a,
.friend-links a {
  display: inline-block;
  padding: 8px 18px;
  border-radius: var(--radius-pill);
  background: var(--bg-card);
  border: 1px solid var(--line);
  font-size: 0.86rem;
  font-weight: 600;
  color: var(--text-soft);
  -webkit-backdrop-filter: var(--glass-blur);
  backdrop-filter: var(--glass-blur);
  transition: all 0.3s var(--ease);
}

.sitemap-list a:hover,
.friend-links a:hover,
.sitemap-list a:focus-visible,
.friend-links a:focus-visible {
  background: var(--grad-brand);
  border-color: transparent;
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(255, 92, 138, 0.35);
}

/* ============ 版权声明 ============ */
#legal > article {
  padding: 22px 24px;
  margin-bottom: 14px;
  border-radius: var(--radius);
  background: var(--bg-card);
  border: 1px solid var(--line);
  -webkit-backdrop-filter: var(--glass-blur);
  backdrop-filter: var(--glass-blur);
  box-shadow: var(--shadow-soft);
}

#legal h3 {
  font-size: 1rem;
  color: var(--text);
}

#legal p {
  font-size: 0.92rem;
  margin-bottom: 0;
}

/* ============ 页脚 ============ */
.site-footer {
  margin-top: clamp(48px, 7vw, 80px);
  padding: 40px 20px;
  border-top: 1px solid var(--line);
  background: linear-gradient(180deg, transparent, rgba(0, 0, 0, 0.25));
}

body.light-mode .site-footer {
  background: linear-gradient(180deg, transparent, rgba(20, 22, 50, 0.04));
}

.footer-inner {
  max-width: var(--maxw);
  margin: 0 auto;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 24px;
}

.footer-brand {
  max-width: 420px;
}

.footer-brand strong {
  display: block;
  font-size: 1.1rem;
  margin-bottom: 6px;
  background: var(--grad-brand);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.footer-brand p {
  font-size: 0.88rem;
  margin: 0;
}

.footer-meta {
  text-align: right;
}

.footer-meta p {
  margin: 0 0 6px;
  font-size: 0.82rem;
  color: var(--text-dim);
}

.footer-meta a {
  color: var(--text-soft);
}

.footer-meta a:hover {
  color: var(--brand);
}

/* ============ 返回顶部 ============ */
.back-to-top {
  position: fixed;
  right: 22px;
  bottom: 22px;
  z-index: 90;
  padding: 12px 18px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--line-strong);
  background: var(--bg-card);
  color: var(--text);
  font-size: 0.82rem;
  font-weight: 700;
  font-family: inherit;
  cursor: pointer;
  -webkit-backdrop-filter: var(--glass-blur);
  backdrop-filter: var(--glass-blur);
  box-shadow: var(--shadow-soft);
  opacity: 0;
  visibility: hidden;
  transform: translateY(16px);
  transition: opacity 0.35s var(--ease), transform 0.35s var(--ease), visibility 0.35s var(--ease), background 0.3s var(--ease), color 0.3s var(--ease);
}

.back-to-top.is-visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.back-to-top:hover {
  background: var(--grad-brand);
  color: #fff;
  border-color: transparent;
  transform: translateY(-3px);
}

/* ============ 响应式 ============ */
@media (max-width: 1080px) {
  .main-nav a {
    padding: 6px 8px;
    font-size: 0.82rem;
  }
  .site-search input {
    width: 120px;
  }
  .site-search input:focus {
    width: 150px;
  }
}

@media (max-width: 920px) {
  :root {
    --header-h: 64px;
  }
  .header-inner {
    flex-wrap: wrap;
    gap: 10px;
    padding: 8px 16px;
  }
  .site-header {
    height: auto;
    min-height: var(--header-h);
  }
  .brand {
    margin-right: auto;
  }
  .brand-logo {
    width: 36px;
    height: 36px;
    border-radius: 11px;
    font-size: 1rem;
  }
  .brand-text em {
    display: none;
  }
  .menu-toggle {
    display: inline-block;
  }
  .site-search {
    display: none;
  }
  .main-nav {
    order: 10;
    flex-basis: 100%;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.45s var(--ease);
  }
  .main-nav.is-open {
    max-height: 620px;
  }
  .main-nav ul {
    flex-direction: column;
    gap: 2px;
    padding: 8px 0 12px;
    border-top: 1px solid var(--line);
  }
  .main-nav a {
    display: block;
    padding: 10px 14px;
    border-radius: var(--radius-sm);
    font-size: 0.92rem;
  }
  .main-nav a::after {
    display: none;
  }
  .about-grid {
    grid-template-columns: 1fr;
  }
  .about-brand {
    grid-row: auto;
  }
  .stat-list {
    grid-template-columns: repeat(2, 1fr);
  }
  .hero-slide {
    min-height: 0;
  }
}

@media (max-width: 640px) {
  body {
    font-size: 15px;
  }
  .section {
    padding-top: 40px;
  }
  .hero {
    margin-top: 16px;
    padding: 0 14px;
  }
  .hero-slide {
    padding: 26px 20px;
  }
  .hero-slide h1,
  .hero-slide h2 {
    max-width: none;
  }
  .hero-controls {
    gap: 8px;
  }
  .hero-prev,
  .hero-next {
    padding: 7px 12px;
    font-size: 0.76rem;
  }
  .hero-dots button {
    width: 28px;
    height: 28px;
    font-size: 0.74rem;
  }
  .stats,
  .breadcrumb {
    padding: 0 14px;
  }
  .stat-list {
    gap: 10px;
  }
  .stat-list li {
    padding: 16px 10px;
  }
  .product-card,
  .solution-item,
  .case-item,
  .article-card,
  .howto-block,
  .contact-grid article,
  .about-grid > article {
    padding: 20px;
  }
  .article-list {
    grid-template-columns: 1fr;
  }
  .footer-inner {
    flex-direction: column;
  }
  .footer-meta {
    text-align: left;
  }
  .back-to-top {
    right: 14px;
    bottom: 14px;
    padding: 10px 14px;
    font-size: 0.76rem;
  }
  .faq-item summary {
    padding: 14px 46px 14px 16px;
  }
  .faq-item > p {
    padding: 0 16px 16px;
  }
  .sitemap-list a,
  .friend-links a {
    padding: 7px 14px;
    font-size: 0.8rem;
  }
}

@media (max-width: 400px) {
  .stat-list {
    grid-template-columns: 1fr;
  }
  .theme-toggle,
  .menu-toggle {
    padding: 7px 10px;
    font-size: 0.76rem;
  }
}

@media print {
  .site-header,
  .hero-controls,
  .back-to-top,
  .theme-toggle,
  .menu-toggle {
    display: none !important;
  }
  body {
    background: #fff;
    color: #000;
  }
  .section,
  .hero {
    max-width: 100%;
  }
  a {
    color: #000;
    text-decoration: underline;
  }
}