/* ============================================
   酷智云科技 COZVINT — 官网样式
   ============================================ */

/* ---------- Reset & Base ---------- */
*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: "Inter", "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", "Noto Sans CJK SC", system-ui, -apple-system, sans-serif;
  font-size: 16px;
  line-height: 1.6;
  color: var(--c-text);
  background: #ffffff;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}
img, svg { display: block; max-width: 100%; height: auto; }
a { color: inherit; text-decoration: none; }
button { font: inherit; cursor: pointer; background: none; border: 0; color: inherit; }
h1, h2, h3, h4, h5, h6 { line-height: 1.2; letter-spacing: -0.01em; }
ul, ol { list-style: none; }
::selection { background: #1d4ed8; color: #fff; }

/* ---------- Design Tokens ---------- */
:root {
  --c-primary: #1d4ed8;
  --c-primary-hover: #1e40af;
  --c-primary-soft: #eff6ff;
  --c-cyan: #06b6d4;
  --c-text: #0f172a;
  --c-muted: #475569;
  --c-muted-2: #64748b;
  --c-border: #e2e8f0;
  --c-border-2: #f1f5f9;
  --c-bg-alt: #f8fafc;
  --c-dark: #0f172a;
  --c-dark-2: #1e293b;

  --radius-sm: 8px;
  --radius: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;

  --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.04);
  --shadow: 0 4px 16px rgba(15, 23, 42, 0.06);
  --shadow-lg: 0 20px 40px -16px rgba(15, 23, 42, 0.12);
  --shadow-primary: 0 8px 24px -8px rgba(29, 78, 216, 0.35);

  --max-w: 1200px;
  --nav-h: 64px;
}

/* ---------- Layout helpers ---------- */
.container {
  width: 100%;
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 20px;
}
.container--narrow { max-width: 820px; }

@media (min-width: 1024px) {
  .container { padding: 0 32px; }
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 18px;
  border-radius: 999px;
  font-size: 14px;
  font-weight: 500;
  border: 1px solid transparent;
  transition: all 0.2s ease;
  white-space: nowrap;
}
.btn--lg { padding: 14px 24px; font-size: 15px; }
.btn--primary {
  background: var(--c-primary);
  color: #fff;
  box-shadow: var(--shadow-primary);
}
.btn--primary:hover { background: var(--c-primary-hover); transform: translateY(-1px); }
.btn--ghost {
  background: #fff;
  color: var(--c-text);
  border-color: var(--c-border);
}
.btn--ghost:hover { background: var(--c-bg-alt); border-color: #cbd5e1; }

.link {
  color: var(--c-primary);
  font-weight: 500;
  font-size: 14px;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  transition: gap 0.2s ease;
}
.link:hover { gap: 8px; color: var(--c-primary-hover); }
.link--arrow::after { content: "→"; transition: transform 0.2s ease; }
.link--arrow:hover::after { transform: translateX(2px); }

/* ---------- Navbar ---------- */
.nav {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 50;
  height: var(--nav-h);
  background: rgba(255, 255, 255, 0.6);
  backdrop-filter: saturate(180%) blur(12px);
  -webkit-backdrop-filter: saturate(180%) blur(12px);
  transition: background 0.3s ease, box-shadow 0.3s ease;
}
.nav.is-scrolled {
  background: rgba(255, 255, 255, 0.85);
  box-shadow: 0 1px 0 rgba(15, 23, 42, 0.06);
}
.nav__inner {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.nav__brand {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}
.nav__logo {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-sm);
  object-fit: cover;
  border: 1px solid var(--c-border);
}
.nav__brand-text { display: flex; flex-direction: column; line-height: 1.1; }
.nav__brand-name { font-weight: 600; font-size: 15px; }
.nav__brand-en { font-size: 10.5px; letter-spacing: 0.2em; color: var(--c-muted-2); }

.nav__links {
  display: none;
  gap: 4px;
  flex: 1;
  justify-content: center;
}
.nav__links a {
  padding: 8px 12px;
  font-size: 14px;
  color: var(--c-muted);
  border-radius: var(--radius-sm);
  transition: color 0.2s ease;
}
.nav__links a:hover { color: var(--c-primary); }

.nav__cta { display: none; flex-shrink: 0; }

.nav__toggle {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  padding: 0 8px;
  border-radius: var(--radius-sm);
  transition: background 0.2s ease;
}
.nav__toggle:hover { background: var(--c-bg-alt); }
.nav__toggle span {
  display: block;
  height: 2px;
  background: var(--c-text);
  border-radius: 2px;
  transition: transform 0.25s ease, opacity 0.25s ease;
}
.nav__toggle.is-open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav__toggle.is-open span:nth-child(2) { opacity: 0; }
.nav__toggle.is-open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

.nav__mobile {
  position: absolute;
  top: var(--nav-h);
  left: 0;
  right: 0;
  background: #fff;
  border-top: 1px solid var(--c-border-2);
  padding: 12px 20px 20px;
  display: flex;
  flex-direction: column;
  gap: 4px;
  box-shadow: var(--shadow);
}
.nav__mobile a {
  padding: 12px 8px;
  font-size: 15px;
  color: var(--c-text);
  border-bottom: 1px solid var(--c-border-2);
}
.nav__mobile a:last-of-type { border-bottom: 0; }
.nav__mobile[hidden] { display: none; }
.nav__mobile .nav__mobile-cta { color: #fff; border-bottom: 0; }
.nav__mobile-cta { margin-top: 12px; align-self: stretch; justify-content: center; }

@media (min-width: 1024px) {
  .nav__links { display: flex; }
  .nav__cta { display: inline-flex; }
  .nav__toggle { display: none; }
  .nav__mobile { display: none !important; }
}

/* ---------- Section base ---------- */
.section {
  padding: 80px 0;
}
.section--alt { background: var(--c-bg-alt); }
@media (min-width: 1024px) {
  .section { padding: 112px 0; }
}
.section__header {
  max-width: 720px;
  margin: 0 auto 56px;
  text-align: center;
}
.section__title {
  margin-top: 16px;
  font-size: clamp(28px, 3.4vw, 40px);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--c-text);
}
.section__title--left { text-align: left; margin-top: 12px; }
.section__lede {
  margin-top: 16px;
  font-size: 16px;
  color: var(--c-muted);
  line-height: 1.7;
}
.section__lede--left { text-align: left; }

.chip {
  display: inline-block;
  font-size: 12px;
  font-weight: 600;
  color: var(--c-primary);
  background: var(--c-primary-soft);
  padding: 6px 12px;
  border-radius: 999px;
  letter-spacing: 0.02em;
}
.chip--soft { background: var(--c-primary-soft); }

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  font-size: 12px;
  font-weight: 500;
  color: var(--c-primary);
  background: var(--c-primary-soft);
  border-radius: 999px;
}
.eyebrow__dot {
  width: 6px;
  height: 6px;
  border-radius: 999px;
  background: var(--c-primary);
  animation: pulse 2s infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}

/* ---------- Grids ---------- */
.grid {
  display: grid;
  gap: 24px;
}
/* 客户案例栅格：列数由 main.js 按案例数量自动决定（2 或 3 列）
   规则：行数最少优先，行数相同时选择能整除的列数
   移动端 1 列；≥640px 起 2 列；≥1024px 由 JS 计算的 is-cols-N 决定 */
.grid--cases { grid-template-columns: 1fr; }
@media (min-width: 640px) {
  .grid--cases { grid-template-columns: repeat(2, 1fr); }
}
@media (min-width: 1024px) {
  .grid--cases { grid-template-columns: repeat(3, 1fr); }
  .grid--cases.is-cols-2 { grid-template-columns: repeat(2, 1fr); }
  .grid--cases.is-cols-3 { grid-template-columns: repeat(3, 1fr); }
}
.grid--3 { grid-template-columns: 1fr; }
.grid--4 { grid-template-columns: 1fr; }
@media (min-width: 768px) {
  .grid--3 { grid-template-columns: repeat(2, 1fr); }
  .grid--4 { grid-template-columns: repeat(2, 1fr); }
}
@media (min-width: 1024px) {
  .grid--3 { grid-template-columns: repeat(3, 1fr); }
  .grid--4 { grid-template-columns: repeat(4, 1fr); }
}

/* ---------- Hero ---------- */
.hero {
  position: relative;
  padding-top: calc(var(--nav-h) + 64px);
  padding-bottom: 80px;
  overflow: hidden;
  isolation: isolate;
}
.hero__bg {
  position: absolute;
  inset: 0;
  z-index: -1;
  background: linear-gradient(180deg, #eff6ff 0%, #ffffff 100%);
}
.hero__bg::before,
.hero__bg::after {
  content: "";
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.5;
}
.hero__bg::before {
  top: -200px; right: -200px;
  width: 600px; height: 600px;
  background: #bfdbfe;
}
.hero__bg::after {
  bottom: -200px; left: -200px;
  width: 500px; height: 500px;
  background: #a5f3fc;
}
.hero__grid {
  display: grid;
  gap: 48px;
  grid-template-columns: 1fr;
  align-items: center;
}
@media (min-width: 1024px) {
  .hero { padding-top: calc(var(--nav-h) + 96px); padding-bottom: 112px; }
  .hero__grid {
    grid-template-columns: 1.05fr 1fr;
    gap: 64px;
  }
}
.hero__title {
  margin-top: 24px;
  font-size: clamp(36px, 5vw, 64px);
  font-weight: 700;
  letter-spacing: -0.025em;
  line-height: 1.05;
}
.hero__lede {
  margin-top: 24px;
  max-width: 540px;
  font-size: 17px;
  color: var(--c-muted);
  line-height: 1.7;
}
.hero__cta {
  margin-top: 32px;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}
.hero__stats {
  margin-top: 48px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  max-width: 520px;
}
.hero__stats div { display: flex; flex-direction: column; }
.hero__stats dt {
  font-size: clamp(24px, 3vw, 32px);
  font-weight: 700;
  color: var(--c-text);
  line-height: 1;
}
.hero__stats dd {
  margin-top: 6px;
  font-size: 12px;
  color: var(--c-muted-2);
}

.hero__visual { position: relative; }
.hero__visual-glow {
  position: absolute;
  inset: -16px;
  background: linear-gradient(135deg, rgba(147, 197, 253, 0.45), rgba(165, 243, 252, 0.45));
  border-radius: var(--radius-xl);
  filter: blur(40px);
  z-index: -1;
}
.hero__image {
  border-radius: var(--radius-xl);
  box-shadow: 0 25px 60px -20px rgba(15, 23, 42, 0.25);
  border: 1px solid rgba(226, 232, 240, 0.6);
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}
.hero__badge {
  position: absolute;
  bottom: -20px;
  left: -16px;
  background: #fff;
  border: 1px solid rgba(226, 232, 240, 0.6);
  border-radius: var(--radius);
  box-shadow: 0 10px 30px -10px rgba(15, 23, 42, 0.15);
  padding: 12px 16px;
  display: flex;
  align-items: center;
  gap: 12px;
}
.hero__badge-icon {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: var(--c-primary);
  color: #fff;
  display: grid;
  place-items: center;
}
.hero__badge-eyebrow { font-size: 11px; color: var(--c-muted-2); }
.hero__badge-title { font-size: 14px; font-weight: 600; color: var(--c-text); }
@media (max-width: 640px) {
  .hero__badge { left: 12px; padding: 10px 12px; }
}

/* ---------- Service cards ---------- */
.ds-cards { margin-top: 0; }
.service-card {
  position: relative;
  background: #fff;
  border: 1px solid var(--c-border);
  border-radius: var(--radius-lg);
  padding: 28px;
  transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
  overflow: hidden;
}
.service-card:hover {
  border-color: #bfdbfe;
  box-shadow: 0 12px 32px -10px rgba(29, 78, 216, 0.1);
  transform: translateY(-2px);
}
.service-card__icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--c-primary), #2563eb);
  color: #fff;
  display: grid;
  place-items: center;
  margin-bottom: 20px;
  box-shadow: 0 6px 16px -6px rgba(29, 78, 216, 0.5);
}
.service-card h3 { font-size: 20px; font-weight: 600; color: var(--c-text); }
.service-card p { margin-top: 12px; font-size: 14px; color: var(--c-muted); line-height: 1.7; }
.service-card__bar {
  position: absolute;
  left: 28px;
  right: 28px;
  bottom: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--c-primary), var(--c-cyan));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.3s ease;
}
.service-card:hover .service-card__bar { transform: scaleX(1); }

.ds-products { margin-top: 64px; }
.ds-products__head {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  flex-wrap: wrap;
  gap: 16px;
  margin-bottom: 24px;
}
.ds-products__title { font-size: 22px; font-weight: 600; }
.ds-products__sub { margin-top: 8px; font-size: 14px; color: var(--c-muted); }

.product-card {
  background: #fff;
  border: 1px solid var(--c-border);
  border-radius: var(--radius-lg);
  padding: 24px;
  transition: border-color 0.2s ease;
}
.product-card:hover { border-color: #bfdbfe; }
.product-card__head {
  display: flex;
  align-items: center;
  gap: 10px;
}
.product-card__bar {
  width: 6px;
  height: 24px;
  background: var(--c-primary);
  border-radius: 4px;
  flex-shrink: 0;
}
.product-card h4 { font-size: 17px; font-weight: 600; }
.product-card p { margin-top: 10px; font-size: 14px; color: var(--c-muted); line-height: 1.7; }

/* ---------- AI Solutions ---------- */
.sol-list { display: flex; flex-direction: column; gap: 24px; }
.sol-card {
  display: grid;
  grid-template-columns: 1fr;
  background: #fff;
  border: 1px solid var(--c-border);
  border-radius: var(--radius-xl);
  overflow: hidden;
  transition: box-shadow 0.25s ease;
}
.sol-card:hover { box-shadow: 0 20px 40px -16px rgba(15, 23, 42, 0.1); }
.sol-card__media {
  position: relative;
  aspect-ratio: 16 / 10;
  overflow: hidden;
}
.sol-card__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.sol-card__body { padding: 32px; }
.sol-card__body h3 {
  margin-top: 14px;
  font-size: clamp(22px, 2.4vw, 28px);
  font-weight: 700;
}
.check-list { margin-top: 24px; display: flex; flex-direction: column; gap: 12px; }
.check-list li {
  position: relative;
  padding-left: 28px;
  color: var(--c-muted);
  font-size: 15px;
}
.check-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 6px;
  width: 18px;
  height: 18px;
  background: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%231d4ed8' stroke-width='3' stroke-linecap='round' stroke-linejoin='round'><path d='M5 12l4 4L19 7'/></svg>") center/contain no-repeat;
}

@media (min-width: 1024px) {
  .sol-card {
    grid-template-columns: 1fr 1fr;
    align-items: stretch;
  }
  .sol-card__media { aspect-ratio: auto; min-height: 320px; }
  .sol-card__body { padding: 56px 64px; display: flex; flex-direction: column; justify-content: center; }
  .sol-card--reverse .sol-card__media { order: 2; }
}

/* ---------- Workflow ---------- */
.flow {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}
@media (min-width: 640px) {
  .flow { grid-template-columns: repeat(2, 1fr); }
}
@media (min-width: 1024px) {
  .flow { grid-template-columns: repeat(5, 1fr); }
}
.flow li {
  background: #fff;
  border: 1px solid var(--c-border);
  border-radius: var(--radius-lg);
  padding: 20px;
  transition: all 0.2s ease;
}
.flow li:hover { border-color: #bfdbfe; transform: translateY(-2px); }
.flow__num {
  display: block;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--c-primary);
  margin-bottom: 12px;
}
.flow__text {
  font-size: 14px;
  color: var(--c-text);
  line-height: 1.6;
}

/* ---------- Case cards ---------- */
.case-card {
  background: #fff;
  border: 1px solid var(--c-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all 0.25s ease;
}
.case-card:hover { box-shadow: 0 20px 40px -16px rgba(15, 23, 42, 0.1); }
.case-card__media {
  aspect-ratio: 4 / 3;
  overflow: hidden;
  background: var(--c-bg-alt);
}
.case-card__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}
.case-card:hover .case-card__media img { transform: scale(1.05); }
.case-card__body { padding: 24px; }
.tag {
  display: inline-block;
  font-size: 12px;
  font-weight: 500;
  color: var(--c-primary);
  background: var(--c-primary-soft);
  padding: 4px 10px;
  border-radius: 999px;
}
.case-card h3 { margin-top: 12px; font-size: 18px; font-weight: 600; }
.case-card p { margin-top: 8px; font-size: 14px; color: var(--c-muted); line-height: 1.7; }

/* ---------- Testimonial ---------- */
.quote {
  position: relative;
  margin-top: 64px;
  padding: 48px 32px;
  background: linear-gradient(135deg, #1d4ed8 0%, #1e3a8a 100%);
  color: #fff;
  border-radius: var(--radius-xl);
  overflow: hidden;
}
@media (min-width: 1024px) {
  .quote { padding: 56px 64px; }
}
.quote__bg {
  position: absolute;
  inset: 0;
  pointer-events: none;
}
.quote__bg::before,
.quote__bg::after {
  content: "";
  position: absolute;
  border-radius: 50%;
  filter: blur(60px);
}
.quote__bg::before { top: -80px; right: -80px; width: 240px; height: 240px; background: rgba(255, 255, 255, 0.12); }
.quote__bg::after { bottom: -80px; left: -80px; width: 240px; height: 240px; background: rgba(34, 211, 238, 0.18); }
.quote__mark { color: rgba(147, 197, 253, 0.5); position: relative; }
.quote blockquote {
  position: relative;
  margin-top: 16px;
  font-size: clamp(18px, 2vw, 24px);
  font-weight: 500;
  line-height: 1.5;
  max-width: 800px;
}
.quote blockquote p { quotes: none; }
.quote figcaption {
  position: relative;
  margin-top: 32px;
  display: flex;
  align-items: center;
  gap: 12px;
}
.quote__avatar {
  width: 44px;
  height: 44px;
  border-radius: 999px;
  object-fit: cover;
  border: 2px solid rgba(255, 255, 255, 0.3);
}
.quote__name { font-size: 14px; font-weight: 500; }
.quote__role { font-size: 12px; color: rgba(191, 219, 254, 0.85); margin-top: 2px; }

/* ---------- About ---------- */
.about__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 48px;
  align-items: center;
}
@media (min-width: 1024px) {
  .about__grid { grid-template-columns: 1.1fr 1fr; gap: 80px; }
}
.stats-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}
.stat {
  background: #fff;
  border: 1px solid var(--c-border);
  border-radius: var(--radius-lg);
  padding: 24px;
}
.stat__num {
  font-size: clamp(28px, 3.4vw, 36px);
  font-weight: 700;
  color: var(--c-primary);
  line-height: 1;
}
.stat__label {
  margin-top: 10px;
  font-size: 14px;
  color: var(--c-muted);
}

.partners {
  margin-top: 80px;
  text-align: center;
}
.partners__eyebrow {
  font-size: 12px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--c-muted-2);
  margin-bottom: 24px;
}
.partners__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}
@media (min-width: 640px) {
  .partners__grid { grid-template-columns: repeat(3, 1fr); }
}
@media (min-width: 1024px) {
  .partners__grid { grid-template-columns: repeat(5, 1fr); }
}
.partner {
  background: #fff;
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  padding: 16px;
  height: 84px;
  display: grid;
  place-items: center;
  transition: border-color 0.2s ease;
}
.partner:hover { border-color: #bfdbfe; }
.partner img { max-height: 48px; max-width: 100%; object-fit: contain; }

/* ---------- FAQ ---------- */
.faq { display: flex; flex-direction: column; gap: 12px; }
.faq__item {
  background: #fff;
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: border-color 0.2s ease;
}
.faq__item[open] { border-color: #bfdbfe; }
.faq__item summary {
  list-style: none;
  cursor: pointer;
  padding: 20px 24px;
  font-size: 15px;
  font-weight: 500;
  color: var(--c-text);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  transition: background 0.15s ease;
}
.faq__item summary:hover { background: var(--c-bg-alt); }
.faq__item summary::-webkit-details-marker { display: none; }
.faq__item summary::after {
  content: "";
  width: 20px;
  height: 20px;
  flex-shrink: 0;
  background: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%231d4ed8' stroke-width='2.5' stroke-linecap='round' stroke-linejoin='round'><path d='M6 9l6 6 6-6'/></svg>") center/contain no-repeat;
  transition: transform 0.2s ease;
}
.faq__item[open] summary::after { transform: rotate(180deg); }
.faq__answer {
  padding: 0 24px 20px;
  color: var(--c-muted);
  font-size: 14px;
  line-height: 1.75;
}

/* ---------- Contact ---------- */
.contact {
  position: relative;
  padding: 80px 0;
  background: linear-gradient(135deg, #1d4ed8 0%, #1e40af 50%, #1e3a8a 100%);
  color: #fff;
  overflow: hidden;
  isolation: isolate;
}
@media (min-width: 1024px) {
  .contact { padding: 112px 0; }
}
.contact__bg {
  position: absolute;
  inset: 0;
  z-index: -1;
  opacity: 0.25;
  background-image:
    radial-gradient(circle at 20% 30%, #fff 1px, transparent 1px),
    radial-gradient(circle at 80% 70%, #fff 1px, transparent 1px);
  background-size: 40px 40px, 50px 50px;
}
.contact__inner { max-width: 900px; text-align: center; }
.contact__pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  font-size: 12px;
  font-weight: 500;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.18);
  backdrop-filter: blur(8px);
  border-radius: 999px;
}
.contact__dot {
  width: 6px;
  height: 6px;
  border-radius: 999px;
  background: #34d399;
  animation: pulse 2s infinite;
}
.contact__title {
  margin-top: 24px;
  font-size: clamp(28px, 4vw, 48px);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.02em;
}
.contact__lede {
  margin-top: 20px;
  color: rgba(191, 219, 254, 0.95);
  font-size: 17px;
}
.contact__cards {
  margin-top: 40px;
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  max-width: 640px;
  margin-left: auto;
  margin-right: auto;
}
@media (min-width: 640px) {
  .contact__cards { grid-template-columns: repeat(2, 1fr); }
}
.contact__card {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 24px;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.2);
  backdrop-filter: blur(12px);
  border-radius: var(--radius-lg);
  text-align: left;
  transition: all 0.2s ease;
}
.contact__card:hover {
  background: rgba(255, 255, 255, 0.18);
  transform: translateY(-2px);
}
.contact__card-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.15);
  display: grid;
  place-items: center;
  flex-shrink: 0;
}
.contact__card-eyebrow { font-size: 12px; color: rgba(191, 219, 254, 0.9); }
.contact__card-value { margin-top: 4px; font-size: 18px; font-weight: 600; }

/* ---------- Footer ---------- */
.footer {
  background: var(--c-dark);
  color: #cbd5e1;
  padding: 56px 0 0;
}
.footer__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 40px;
}
@media (min-width: 768px) {
  .footer__grid { grid-template-columns: 2fr 1fr 1fr; gap: 56px; }
}
.footer__brand-row { display: flex; align-items: center; gap: 12px; }
.footer__logo {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  object-fit: cover;
  border: 1px solid #334155;
}
.footer__name { color: #fff; font-weight: 600; }
.footer__en { font-size: 11px; letter-spacing: 0.2em; color: #94a3b8; margin-top: 2px; }
.footer__brand p {
  margin-top: 20px;
  font-size: 14px;
  line-height: 1.7;
  color: #94a3b8;
  max-width: 380px;
}
.footer h4 { color: #fff; font-size: 14px; font-weight: 600; margin-bottom: 16px; }
.footer ul { display: flex; flex-direction: column; gap: 10px; font-size: 14px; }
.footer ul a { color: #cbd5e1; transition: color 0.2s ease; }
.footer ul a:hover { color: #fff; }
.footer__contact { gap: 12px; }

.footer__legal {
  margin-top: 48px;
  padding: 20px 0 28px;
  border-top: 1px solid #1e293b;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 12px;
  color: #64748b;
}
.footer__legal-l { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; }
.footer__legal-l a:hover { color: #cbd5e1; }

/* ---------- Reveal animation ---------- */
.reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
  .reveal { opacity: 1; transform: none; }
}

/* ---------- Text gradient helper ---------- */
.text-gradient {
  background: linear-gradient(135deg, var(--c-primary) 0%, var(--c-cyan) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

/* ---------- 子页面：页面头部（Page Hero）与面包屑 ---------- */
.page-hero {
  position: relative;
  padding: calc(var(--nav-h) + 56px) 0 56px;
  background:
    radial-gradient(60% 80% at 85% 10%, rgba(29, 78, 216, 0.06), transparent 70%),
    radial-gradient(40% 60% at 10% 90%, rgba(6, 182, 212, 0.05), transparent 70%),
    var(--c-bg-alt);
  border-bottom: 1px solid var(--c-border-2);
}
.page-hero__title {
  font-size: clamp(30px, 5vw, 44px);
  font-weight: 800;
  letter-spacing: -0.02em;
  margin: 14px 0 14px;
}
.page-hero__lede {
  font-size: clamp(15px, 2vw, 17px);
  color: var(--c-muted);
  max-width: 720px;
}
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--c-muted-2);
}
.breadcrumb a { color: var(--c-muted); transition: color 0.2s ease; }
.breadcrumb a:hover { color: var(--c-primary); }
.breadcrumb__sep { color: var(--c-border); }
.breadcrumb [aria-current="page"] { color: var(--c-primary); font-weight: 600; }

/* 子页面导航当前项高亮 */
.nav__links a[aria-current="page"] {
  color: var(--c-primary);
  font-weight: 600;
}
.nav__mobile a[aria-current="page"] {
  color: var(--c-primary);
  font-weight: 600;
}

/* ---------- 404 页面 ---------- */
.error-page {
  min-height: calc(100vh - var(--nav-h));
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 64px 20px;
  background: var(--c-bg-alt);
}
.error-page__code {
  font-size: clamp(80px, 16vw, 140px);
  font-weight: 800;
  line-height: 1;
  letter-spacing: -0.04em;
  background: linear-gradient(135deg, var(--c-primary) 0%, var(--c-cyan) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.error-page__title {
  font-size: clamp(22px, 4vw, 30px);
  font-weight: 700;
  margin: 20px 0 10px;
}
.error-page__lede {
  color: var(--c-muted);
  max-width: 480px;
  margin: 0 auto 28px;
}
.error-page__actions {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
}

/* ============================================================
   AI 快报（ai-news/）— 列表页 & 日报详情页
   ============================================================ */

/* ---------- 快报元信息条 ---------- */
.ainews-meta {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px 18px;
  font-size: 13px;
  color: var(--c-muted-2);
}
.ainews-meta__item { display: inline-flex; align-items: center; gap: 6px; }
.ainews-meta__item svg { flex-shrink: 0; opacity: 0.7; }

/* ---------- 今日速览（主编点评卡） ---------- */
.ainews-lead {
  position: relative;
  overflow: hidden;
  background: linear-gradient(135deg, #1d4ed8 0%, #1e3a8a 100%);
  border-radius: var(--radius-xl);
  padding: 28px;
  color: #fff;
}
.ainews-lead::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image: radial-gradient(rgba(255, 255, 255, 0.16) 1px, transparent 1px);
  background-size: 18px 18px;
  opacity: 0.5;
  pointer-events: none;
}
.ainews-lead > * { position: relative; z-index: 1; }
.ainews-lead__label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.02em;
  padding: 6px 12px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.14);
  color: #fff;
}
.ainews-lead__title {
  margin: 16px 0 10px;
  font-size: clamp(19px, 2.4vw, 24px);
  font-weight: 700;
  color: #fff;
  line-height: 1.35;
}
.ainews-lead__text {
  font-size: 15px;
  line-height: 1.75;
  color: rgba(255, 255, 255, 0.86);
  max-width: 820px;
}
@media (min-width: 768px) {
  .ainews-lead { padding: 36px 40px; }
}

/* ---------- 版块分组 ---------- */
.ainews-group { margin-top: 48px; }
.ainews-group__head {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 20px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--c-border-2);
}
.ainews-group__title {
  font-size: 19px;
  font-weight: 700;
  color: var(--c-text);
}
.ainews-group__dot {
  width: 10px;
  height: 10px;
  border-radius: 999px;
  flex-shrink: 0;
}
.ainews-group__dot--models { background: #1d4ed8; }
.ainews-group__dot--products { background: #06b6d4; }
.ainews-group__dot--industry { background: #4f46e5; }
.ainews-group__dot--paper { background: #7c3aed; }
.ainews-group__dot--tip { background: #0d9488; }
.ainews-group__count {
  font-size: 12px;
  font-weight: 600;
  color: var(--c-primary);
  background: var(--c-primary-soft);
  padding: 4px 10px;
  border-radius: 999px;
}

/* ---------- 单条资讯卡 ---------- */
.ainews-items { display: flex; flex-direction: column; gap: 14px; }
.ainews-item {
  background: #fff;
  border: 1px solid var(--c-border);
  border-radius: var(--radius-lg);
  padding: 20px;
  transition: border-color 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease;
}
.ainews-item__num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 24px;
  height: 24px;
  padding: 0 6px;
  border-radius: 999px;
  background: var(--c-primary-soft);
  color: var(--c-primary);
  font-size: 12.5px;
  font-weight: 700;
}
.ainews-item:hover {
  border-color: #bfdbfe;
  transform: translateY(-2px);
  box-shadow: var(--shadow);
}
.ainews-item__top {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 10px;
}
.ainews-tag {
  font-size: 12px;
  font-weight: 600;
  padding: 4px 10px;
  border-radius: 999px;
  white-space: nowrap;
}
.ainews-tag--models { color: #1d4ed8; background: #eff6ff; }
.ainews-tag--products { color: #0e7490; background: #ecfeff; }
.ainews-tag--industry { color: #4338ca; background: #eef2ff; }
.ainews-tag--paper { color: #6d28d9; background: #f5f3ff; }
.ainews-tag--tip { color: #0f766e; background: #f0fdfa; }
.ainews-item__source {
  font-size: 13px;
  color: var(--c-muted-2);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.ainews-item__time {
  margin-left: auto;
  font-size: 12px;
  color: var(--c-muted-2);
  white-space: nowrap;
}
.ainews-item__title {
  font-size: 17px;
  font-weight: 600;
  line-height: 1.5;
  color: var(--c-text);
  transition: color 0.2s ease;
}
.ainews-item:hover .ainews-item__title { color: var(--c-primary); }
.ainews-item__summary {
  margin-top: 10px;
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--c-muted);
}
.ainews-item__link {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  margin-top: 12px;
  font-size: 13px;
  font-weight: 500;
  color: var(--c-primary);
}
.ainews-item__link:hover { gap: 8px; }

/* ---------- 列表页：快报卡片栅格 ---------- */
.ainews-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
}
@media (min-width: 768px) {
  .ainews-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (min-width: 1024px) {
  .ainews-grid { grid-template-columns: repeat(3, 1fr); }
}
.ainews-card {
  position: relative;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  background: #fff;
  border: 1px solid var(--c-border);
  border-radius: var(--radius-lg);
  padding: 28px 24px 24px;
  transition: border-color 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease;
}
.ainews-card::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 4px;
  background: linear-gradient(135deg, #1d4ed8 0%, #06b6d4 100%);
  opacity: 0.85;
}
.ainews-card__badge {
  position: absolute;
  top: 18px;
  right: 18px;
  font-size: 11.5px;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: #fff;
  background: var(--c-primary);
  padding: 4px 10px;
  border-radius: 999px;
}
.ainews-card:hover {
  border-color: #bfdbfe;
  transform: translateY(-2px);
  box-shadow: var(--shadow);
}
.ainews-card__date {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 600;
  color: var(--c-primary);
}
.ainews-card__title {
  margin: 12px 0 10px;
  font-size: 18px;
  font-weight: 700;
  line-height: 1.45;
  color: var(--c-text);
}
.ainews-card__text {
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--c-muted);
  flex: 1;
}
.ainews-card__stats {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 18px 0 0;
}
.ainews-card__stat {
  font-size: 12px;
  color: var(--c-muted-2);
  background: var(--c-bg-alt);
  border: 1px solid var(--c-border-2);
  border-radius: 999px;
  padding: 4px 10px;
}
.ainews-card__more {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: 18px;
  font-size: 14px;
  font-weight: 500;
  color: var(--c-primary);
}
.ainews-card:hover .ainews-card__more { gap: 10px; }
.ainews-card--latest { grid-column: 1 / -1; }
.ainews-card--latest .ainews-card__title { font-size: clamp(20px, 2.6vw, 26px); }

/* ---------- 空状态 ---------- */
.ainews-empty {
  text-align: center;
  padding: 48px 20px;
  border: 1px dashed var(--c-border);
  border-radius: var(--radius-lg);
  color: var(--c-muted-2);
  font-size: 15px;
}

/* ---------- 首页 AI 快报区块：紧凑卡片 ---------- */
.ainews-mini {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}
@media (min-width: 768px) {
  .ainews-mini { grid-template-columns: repeat(3, 1fr); }
}
.ainews-mini__card {
  position: relative;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  background: #fff;
  border: 1px solid var(--c-border);
  border-radius: var(--radius-lg);
  padding: 26px 22px 22px;
  transition: border-color 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease;
}
.ainews-mini__card::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 4px;
  background: linear-gradient(135deg, #1d4ed8 0%, #06b6d4 100%);
  opacity: 0.85;
}
.ainews-mini__card:hover {
  border-color: #bfdbfe;
  transform: translateY(-2px);
  box-shadow: var(--shadow);
}
.ainews-mini__date { font-size: 12.5px; font-weight: 600; color: var(--c-primary); }
.ainews-mini__title {
  margin: 10px 0 8px;
  font-size: 16px;
  font-weight: 600;
  line-height: 1.5;
  color: var(--c-text);
}
.ainews-mini__text {
  font-size: 14px;
  line-height: 1.7;
  color: var(--c-muted);
  flex: 1;
}
.ainews-mini__more {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: 14px;
  font-size: 13.5px;
  font-weight: 500;
  color: var(--c-primary);
}