/* ==========================================================================
   sections.css —— 首屏 / 产品 / 技能 / 博客 / 联系 的区块样式与响应式
   ========================================================================== */

/* ------------------------------------------------------------------ 首屏 */
.hero {
  position: relative;
  overflow: hidden;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: 64px 48px 56px;
  margin-bottom: 30px;
  box-shadow: var(--shadow-sm);
  scroll-margin-top: calc(var(--header-h) + 18px);
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(38rem 22rem at 82% -12%, rgba(255, 122, 26, 0.18), transparent 65%),
    radial-gradient(30rem 20rem at 4% 108%, rgba(109, 91, 247, 0.16), transparent 62%),
    linear-gradient(180deg, transparent 60%, var(--surface-2));
  pointer-events: none;
}

.hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image: linear-gradient(var(--border) 1px, transparent 1px),
    linear-gradient(90deg, var(--border) 1px, transparent 1px);
  background-size: 46px 46px;
  opacity: 0.35;
  mask-image: radial-gradient(70% 60% at 50% 30%, #000 10%, transparent 78%);
  -webkit-mask-image: radial-gradient(70% 60% at 50% 30%, #000 10%, transparent 78%);
  pointer-events: none;
}

.hero__inner {
  position: relative;
  z-index: 1;
  max-width: 780px;
}

.hero__logo {
  height: 54px;
  width: auto;
  margin-bottom: 26px;
  filter: drop-shadow(0 12px 22px rgba(255, 122, 26, 0.28));
  animation: floaty 6s ease-in-out infinite;
}

@keyframes floaty {
  0%,
  100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-7px);
  }
}

.hero__name {
  font-size: clamp(2.1rem, 5vw, 3.4rem);
  letter-spacing: -0.03em;
}

.hero__role {
  margin-top: 12px;
  font-size: clamp(1rem, 1.6vw, 1.15rem);
  font-weight: 600;
  color: var(--accent);
}

.hero__desc {
  margin-top: 16px;
  max-width: 620px;
  font-size: 1.02rem;
  line-height: 1.85;
  color: var(--text-soft);
}

.hero__stats {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 30px;
}

.hero__stat {
  min-width: 132px;
  padding: 14px 20px;
  border-radius: var(--radius);
  background: color-mix(in srgb, var(--surface) 72%, transparent);
  border: 1px solid var(--border);
  backdrop-filter: blur(8px);
}

.hero__stat-value {
  font-size: 1.6rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  background: var(--gradient);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero__stat-label {
  margin-top: 2px;
  font-size: 0.82rem;
  color: var(--muted);
}

.hero__ctas {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 30px;
}

/* ------------------------------------------------------------------ 产品 */
.products-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(330px, 1fr));
  gap: 24px;
}

.products-empty {
  padding: 40px;
  text-align: center;
  color: var(--muted);
  border: 1px dashed var(--border);
  border-radius: var(--radius);
}

/* ------------------------------------------------------------------ 技能 */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(255px, 1fr));
  gap: 20px;
}

.skill-card {
  padding: 24px 22px;
  border-radius: var(--radius-lg);
  background: var(--surface-2);
  border: 1px solid var(--border);
  transition: transform 0.25s var(--ease), box-shadow 0.25s var(--ease),
    border-color 0.25s var(--ease);
}

.skill-card:hover {
  transform: translateY(-4px);
  border-color: color-mix(in srgb, var(--skill-accent, var(--accent)) 40%, var(--border));
  box-shadow: var(--shadow-md);
}

.skill-card__head {
  display: flex;
  align-items: center;
  gap: 12px;
  padding-bottom: 16px;
  margin-bottom: 18px;
  border-bottom: 1px solid var(--border);
}

.skill-card__icon {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  flex-shrink: 0;
  border-radius: var(--radius-sm);
  color: #fff;
  background: linear-gradient(135deg, var(--skill-accent, var(--accent)), var(--brand-amber));
  box-shadow: 0 10px 20px -12px color-mix(in srgb, var(--skill-accent, var(--accent)) 85%, transparent);
}

.skill-card__icon svg {
  width: 21px;
  height: 21px;
}

.skill-card__title {
  font-size: 1.06rem;
}

.skill-card__desc {
  font-size: 0.8rem;
  color: var(--muted);
}

.skill-card__list {
  display: grid;
  gap: 14px;
}

/* ------------------------------------------------------------------ 博客 */
.post-list {
  display: grid;
  gap: 14px;
}

/* ------------------------------------------------------------------ 联系 */
.contact-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 16px;
}

/* -------------------------------------------------------------- 二维码 */
.qr-block {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 16px;
  margin-top: 22px;
}

.qr-card {
  display: flex;
  align-items: center;
  gap: 20px;
  padding: 20px 24px;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  background: var(--surface-2);
  transition: transform 0.25s var(--ease), border-color 0.25s var(--ease),
    box-shadow 0.25s var(--ease);
}

.qr-card:hover {
  border-color: var(--accent);
  box-shadow: var(--shadow-sm);
}

.qr-card--link:hover {
  transform: translateY(-3px);
}

/* 二维码需要浅色底，深色主题下也保持白色 */
.qr-card__img {
  width: 118px;
  height: 118px;
  flex-shrink: 0;
  padding: 9px;
  object-fit: contain;
  border-radius: var(--radius);
  background: #ffffff;
  box-shadow: var(--shadow-sm), 0 0 0 1px var(--border);
}

.qr-card__body {
  min-width: 0;
}

.qr-card__name {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 1rem;
  font-weight: 600;
}

.qr-card__icon {
  display: grid;
  place-items: center;
  width: 26px;
  height: 26px;
  flex-shrink: 0;
  border-radius: 8px;
  background: var(--accent-soft);
  color: var(--accent);
}

.qr-card__icon svg {
  width: 16px;
  height: 16px;
}

.qr-card__caption {
  margin-top: 8px;
  font-size: 0.88rem;
  line-height: 1.7;
  color: var(--muted);
}

.qr-card__hint {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: 10px;
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--accent);
}

.qr-card__hint svg {
  width: 14px;
  height: 14px;
}

/* ---------------------------------------------------------------- 响应式 */
@media (max-width: 900px) {
  .hero {
    padding: 46px 26px 40px;
    border-radius: var(--radius-lg);
  }

  .hero__logo {
    height: 44px;
  }

  .section__head {
    margin-bottom: 26px;
  }
}

@media (max-width: 620px) {
  .products-grid,
  .skills-grid,
  .contact-grid {
    grid-template-columns: 1fr;
  }

  .qr-card {
    padding: 16px;
    gap: 14px;
  }

  .qr-card__img {
    width: 96px;
    height: 96px;
  }

  .hero__stat {
    flex: 1 1 40%;
  }

  .hero__ctas .btn {
    flex: 1;
  }

  .footer__top {
    flex-direction: column;
  }

  .to-top {
    right: 14px;
    bottom: 14px;
  }
}

/* ------------------------------------------------------------------ 打印 */
@media print {
  body::before,
  .site-header,
  .to-top {
    display: none !important;
  }

  .section,
  .hero,
  .product-card {
    box-shadow: none;
    border-color: #ddd;
    break-inside: avoid;
  }
}