/* =============================================================
 * download.css
 * 下载页专属样式 (download.html)
 * 复用 base/layout/components/animations,本文件只补差异
 * ============================================================= */

/* ===================== Hero ===================== */
.dl-hero {
  padding: 90px 0 70px;
  background: linear-gradient(180deg, #f7f9fc 0%, #ffffff 100%);
}

.dl-hero__inner {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  align-items: center;
  gap: var(--space-xl);
}

.dl-hero__title {
  font-size: 40px;
  font-weight: 700;
  color: var(--color-heading);
  margin: 0 0 var(--space-md);
  line-height: 1.25;
}

.dl-hero__sub {
  font-size: 18px;
  color: var(--color-primary);
  font-weight: 500;
  margin: 0 0 var(--space-lg);
}

.dl-hero__cta {
  margin-bottom: 0;
}

.dl-hero__media {
  display: flex;
  justify-content: center;
}

.dl-hero__img {
  width: 100%;
  max-width: 520px;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
}

/* ===================== 主下载区 ===================== */
.dl-main {
  padding: var(--space-2xl) 0;
}

.dl-main__lead {
  text-align: center;
  font-size: 16px;
  color: var(--color-primary);
  font-weight: 500;
  margin-bottom: var(--space-md);
}

.dl-main__desc {
  max-width: 820px;
  margin: 0 auto var(--space-xl);
  text-align: center;
  font-size: 15px;
  line-height: 1.9;
  color: #777;
}

.dl-main__split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  align-items: center;
  gap: var(--space-xl);
  margin-top: var(--space-xl);
}

.dl-main__h3 {
  font-size: 26px;
  font-weight: 600;
  margin: 0 0 var(--space-md);
}

.dl-main__benefits {
  margin: 0 0 var(--space-lg);
  padding: 0;
  list-style: none;
}

.dl-main__benefits li {
  position: relative;
  padding: 10px 0 10px 28px;
  font-size: 15px;
  color: var(--color-text);
  line-height: 1.6;
  border-bottom: 1px dashed #e3e6ea;
}

.dl-main__benefits li:last-child {
  border-bottom: 0;
}

.dl-main__benefits li::before {
  content: '✓';
  position: absolute;
  left: 0;
  top: 10px;
  width: 20px;
  height: 20px;
  background: var(--color-primary);
  color: #fff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  font-weight: 700;
}

.dl-main__benefits strong {
  color: var(--color-heading);
  font-weight: 600;
  margin-right: 6px;
}

.dl-main__cta {
  display: inline-flex;
  align-items: center;
  gap: 12px;
}

.dl-main__size {
  display: inline-block;
  font-size: 12px;
  font-weight: 500;
  background: rgba(255, 255, 255, 0.2);
  padding: 2px 10px;
  border-radius: 999px;
  color: rgba(255, 255, 255, 0.95);
}

.dl-main__img {
  width: 100%;
  max-width: 480px;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
}

/* ===================== 版本信息卡 ===================== */
.dl-version {
  background: var(--color-bg-alt);
  padding: var(--space-2xl) 0;
}

.dl-version .section-title {
  text-align: center;
  margin-bottom: var(--space-xl);
}

.dl-version__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-md);
  max-width: 1000px;
  margin: 0 auto;
}

.dl-version__cell {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-md);
  display: flex;
  flex-direction: column;
  gap: 6px;
  transition: all var(--duration-base) var(--ease-out);
}

.dl-version__cell:hover {
  border-color: var(--color-primary);
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
}

.dl-version__label {
  font-size: 12px;
  color: #888;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  font-weight: 500;
}

.dl-version__value {
  font-size: 15px;
  color: var(--color-heading);
  font-weight: 600;
  line-height: 1.4;
  word-break: break-word;
}

.dl-version__value--accent {
  color: var(--color-primary);
  font-size: 18px;
  font-weight: 700;
}

/* ===================== 本次更新亮点 ===================== */
.dl-updates {
  background: #fff;
  padding: var(--space-2xl) 0;
}

.dl-updates .section-title {
  text-align: center;
  margin-bottom: var(--space-xl);
}

.dl-updates__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-md);
  max-width: 1100px;
  margin: 0 auto;
}

.dl-update-item {
  background: var(--color-bg-alt);
  border-radius: var(--radius-md);
  padding: var(--space-md);
  text-align: center;
  transition: all var(--duration-base) var(--ease-out);
  border: 1px solid transparent;
}

.dl-update-item:hover {
  background: #fff;
  border-color: var(--color-primary);
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}

.dl-update-item__icon {
  font-size: 36px;
  margin-bottom: var(--space-xs);
  line-height: 1;
}

.dl-update-item__title {
  font-size: 16px;
  font-weight: 600;
  color: var(--color-heading);
  margin: 0 0 6px;
}

.dl-update-item__desc {
  font-size: 13px;
  color: #777;
  margin: 0;
  line-height: 1.6;
}

/* ===================== 系统要求 + 安装步骤 ===================== */
.dl-req {
  background: var(--color-bg-alt);
  padding: var(--space-2xl) 0;
}

.dl-req__split {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: var(--space-xl);
  align-items: start;
}

.dl-req__col .section-title {
  margin-bottom: var(--space-lg);
}

/* 系统要求列表 */
.dl-req__list {
  margin: 0;
  padding: 0;
  list-style: none;
  background: #fff;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  overflow: hidden;
}

.dl-req__list li {
  display: flex;
  align-items: center;
  padding: 14px var(--space-md);
  border-bottom: 1px solid var(--color-border);
  transition: background var(--duration-fast) var(--ease-out);
}

.dl-req__list li:last-child {
  border-bottom: 0;
}

.dl-req__list li:hover {
  background: var(--color-bg-soft);
}

.dl-req__name {
  flex: 0 0 110px;
  font-size: 14px;
  font-weight: 600;
  color: var(--color-heading);
}

.dl-req__spec {
  flex: 1;
  font-size: 14px;
  color: var(--color-text);
}

/* 安装步骤 */
.dl-steps {
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: step;
}

.dl-step {
  display: flex;
  align-items: flex-start;
  gap: var(--space-md);
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-md);
  margin-bottom: var(--space-sm);
  transition: all var(--duration-base) var(--ease-out);
}

.dl-step:last-child {
  margin-bottom: 0;
}

.dl-step:hover {
  border-color: var(--color-primary);
  transform: translateX(4px);
  box-shadow: var(--shadow-sm);
}

.dl-step__num {
  flex: 0 0 36px;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--color-primary);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 15px;
  font-weight: 700;
}

.dl-step__body {
  flex: 1;
}

.dl-step__title {
  font-size: 15px;
  font-weight: 600;
  color: var(--color-heading);
  margin: 0 0 4px;
}

.dl-step__desc {
  font-size: 13px;
  color: #777;
  margin: 0;
  line-height: 1.6;
}

.dl-step__desc code {
  background: var(--color-bg-soft);
  color: var(--color-primary);
  padding: 1px 6px;
  border-radius: 4px;
  font-family: 'SF Mono', 'Consolas', monospace;
  font-size: 12px;
}

/* ===================== 响应式 ===================== */
@media (max-width: 980px) {
  .dl-hero__inner,
  .dl-main__split,
  .dl-req__split {
    grid-template-columns: 1fr;
  }

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

  .dl-hero__title {
    font-size: 30px;
  }
}

@media (max-width: 600px) {
  .dl-version__grid,
  .dl-updates__grid {
    grid-template-columns: 1fr;
  }

  .dl-req__name {
    flex: 0 0 90px;
  }
}