/* ============================================
   产品中心 / 资料下载页 专属样式
   复用 common.css 的设计 token、topbar/nav/footer
   ============================================ */

/* 深色页头 */
.page-header {
  background: var(--ink);
  background-image:
    radial-gradient(ellipse at 80% 50%, rgba(0, 82, 217, 0.3), transparent 55%),
    linear-gradient(135deg, #0A1628 0%, #1B2A41 100%);
  position: relative;
  overflow: hidden;
  padding: 52px 0 48px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.page-header::before {
  content: "";
  position: absolute;
  inset: 0;
  opacity: 0.05;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.5) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.5) 1px, transparent 1px);
  background-size: 60px 60px;
}

.page-header-inner {
  position: relative;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 32px;
}

.page-eyebrow {
  font-family: "JetBrains Mono", monospace;
  font-size: 11px;
  color: #6B8AB5;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  margin-bottom: 14px;
}

.page-eyebrow::before { content: "/ "; }

.page-header h1 {
  font-family: "Barlow Condensed", "Noto Sans SC", sans-serif;
  font-size: 44px;
  font-weight: 800;
  color: #fff;
  letter-spacing: -0.01em;
  margin-bottom: 8px;
}

.page-header .sub { font-size: 14px; color: #8595B0; }

/* 布局：左侧分类 + 右侧型号列表 */
.page-body {
  max-width: var(--container);
  margin: 0 auto;
  padding: 48px 32px 80px;
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: 48px;
  align-items: start;
}

/* 左侧分类 */
.dc-sidebar { position: sticky; top: 90px; }

.sidebar-label {
  font-family: "JetBrains Mono", monospace;
  font-size: 10px;
  color: var(--mute);
  letter-spacing: 0.15em;
  text-transform: uppercase;
  margin-bottom: 12px;
}

.cat-list { list-style: none; }
.cat-list li { margin-bottom: 2px; }

.cat-list button {
  display: block;
  width: 100%;
  text-align: left;
  background: none;
  border: none;
  border-radius: var(--r-sm);
  padding: 11px 14px;
  font-size: 13.5px;
  color: var(--mute);
  cursor: pointer;
  font-family: "Noto Sans SC", sans-serif;
  line-height: 1.4;
  transition: all var(--t-fast);
}

.cat-list button:hover { background: var(--bg); color: var(--ink); }
.cat-list li.active button { background: var(--accent-light); color: var(--accent); font-weight: 600; }

/* 型号块 */
.model-block { padding: 28px 0; border-bottom: 1px solid var(--line); }
.model-block:first-child { padding-top: 0; }

.model-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 8px;
}

.model-kw {
  font-family: "Barlow Condensed", "Noto Sans SC", sans-serif;
  font-size: 21px;
  font-weight: 700;
  color: var(--ink);
  display: flex;
  align-items: center;
  gap: 10px;
  line-height: 1.2;
}

.model-badge {
  font-family: "JetBrains Mono", monospace;
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.08em;
  padding: 2px 8px;
  border-radius: 4px;
  background: var(--ink);
  color: #fff;
  text-transform: uppercase;
}

.model-badge.flagship { background: var(--accent); }

.model-spec {
  font-size: 12.5px;
  color: var(--mute);
  margin-top: 4px;
  font-family: "JetBrains Mono", monospace;
  letter-spacing: 0.03em;
}

/* 文件行 */
.file-section { margin-top: 14px; }

.file-row {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 0;
  border-bottom: 1px solid var(--line);
  font-size: 13px;
}

.file-row:last-of-type { border-bottom: none; }
.file-row.pending { opacity: 0.65; }

.file-type {
  font-family: "JetBrains Mono", monospace;
  font-size: 10px;
  font-weight: 700;
  padding: 2px 6px;
  border-radius: 4px;
  letter-spacing: 0.05em;
  flex-shrink: 0;
  background: var(--accent-light);
  color: var(--accent);
}

.file-type.soon { background: #FEF0C7; color: #B54708; }
.file-name { flex: 1; color: var(--ink); }
.file-size { font-size: 11.5px; color: var(--mute); font-family: "JetBrains Mono", monospace; flex-shrink: 0; }

.file-dl {
  font-size: 12px;
  color: var(--accent);
  cursor: pointer;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  gap: 4px;
  font-weight: 500;
  padding: 4px 10px;
  border-radius: var(--r-sm);
  transition: background var(--t-fast);
}

.file-dl:hover { background: var(--accent-light); }
.file-soon { font-size: 11.5px; color: #B54708; flex-shrink: 0; }

/* 下载全部资料包 */
.dl-all-row { margin-top: 16px; display: flex; align-items: center; gap: 12px; flex-wrap: wrap; }

.btn-dl-all {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 10px 20px;
  background: var(--ink);
  color: #fff;
  border: none;
  border-radius: var(--r-sm);
  font-size: 12.5px;
  font-weight: 600;
  font-family: "Noto Sans SC", sans-serif;
  cursor: pointer;
  transition: opacity var(--t-fast);
  position: relative;
  overflow: hidden;
}

.btn-dl-all:hover { opacity: 0.85; }
.btn-dl-all:disabled { opacity: 0.4; cursor: not-allowed; }
.btn-dl-all .bar { position: absolute; left: 0; top: 0; bottom: 0; width: 0; background: rgba(255, 255, 255, 0.15); transition: width 0.3s ease; pointer-events: none; }

.dl-status { font-size: 12px; color: var(--mute); }
.dl-status.ok { color: var(--ok); }
.dl-status.err { color: var(--danger); }

.shared-note { font-size: 12px; color: var(--mute); margin-top: 10px; }
.empty-note { font-size: 13px; color: var(--mute); }

@media (max-width: 1024px) {
  .page-body { grid-template-columns: 1fr; gap: 28px; }
  .dc-sidebar { position: static; }
  .cat-list { display: flex; flex-wrap: wrap; gap: 8px; }
  .cat-list li { margin: 0; }
  .page-header h1 { font-size: 34px; }
}

/* ============================================
   资料下载落地：Header（左文 + 右浮动 ZIP）+ 留资门槛
   ============================================ */
/* hidden 属性需压过 .page-body 的 display:grid（否则下载区无法被隐藏） */
.dl-gate[hidden],
.page-body[hidden] { display: none; }

.dl-gate {
  position: relative;
  overflow: hidden;
  background: var(--ink);
  background-image:
    radial-gradient(ellipse at 78% 30%, rgba(0, 82, 217, 0.32), transparent 55%),
    linear-gradient(135deg, #0A1628 0%, #1B2A41 100%);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.dl-gate-bg {
  position: absolute;
  inset: 0;
  opacity: 0.05;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.5) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.5) 1px, transparent 1px);
  background-size: 60px 60px;
}

.dl-gate-inner {
  position: relative;
  z-index: 2;
  max-width: var(--container);
  margin: 0 auto;
  padding: 60px 32px 72px;
}

/* ---- Header ---- */
.dl-hero {
  display: grid;
  grid-template-columns: 1.35fr 1fr;
  gap: 48px;
  align-items: center;
}

.dl-eyebrow {
  font-family: "JetBrains Mono", monospace;
  font-size: 11px;
  color: #6B8AB5;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  margin-bottom: 16px;
}

.dl-eyebrow::before { content: "/ "; }

.dl-hero-text h1 {
  font-family: "Barlow Condensed", "Noto Sans SC", sans-serif;
  font-size: 46px;
  font-weight: 800;
  line-height: 1.05;
  letter-spacing: -0.01em;
  color: #fff;
  margin-bottom: 16px;
}

.dl-hero-desc {
  font-size: 15px;
  line-height: 1.75;
  color: #B8C5DD;
  max-width: 520px;
  margin-bottom: 24px;
}

.dl-chips { display: flex; flex-wrap: wrap; gap: 10px; }

.dl-chips span {
  font-size: 12px;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.12);
  padding: 6px 12px;
  border-radius: var(--r-sm);
  color: #fff;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.dl-chips span::before { content: "✓"; color: #00FF88; font-size: 11px; }

/* ---- 右侧浮动 ZIP 资料包 ---- */
.dl-hero-visual {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 280px;
}

.zip-pack {
  width: 200px;
  height: 240px;
  border-radius: var(--r);
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.09), rgba(255, 255, 255, 0.03));
  border: 1px solid rgba(255, 255, 255, 0.16);
  position: relative;
  overflow: hidden;
  animation: dlFloat 4s ease-in-out infinite;
}

@keyframes dlFloat {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-14px); }
}

.zip-pack::before {
  content: "";
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 70px;
  height: 8px;
  background: var(--accent-bright, #4A90FF);
  border-radius: 0 0 4px 4px;
}

.zip-pack .zip-grid {
  position: absolute;
  inset: 0;
  opacity: 0.08;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.5) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.5) 1px, transparent 1px);
  background-size: 24px 24px;
}

.zip-pack .zip-icon {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -70%);
  font-family: "Barlow Condensed", sans-serif;
  font-size: 64px;
  font-weight: 800;
  color: #fff;
  letter-spacing: 0.05em;
}

.zip-pack .zip-label {
  position: absolute;
  bottom: 30px;
  left: 50%;
  transform: translateX(-50%);
  font-family: "JetBrains Mono", monospace;
  font-size: 10.5px;
  color: var(--accent-bright, #4A90FF);
  letter-spacing: 0.15em;
  white-space: nowrap;
}

.zip-pack .zip-size {
  position: absolute;
  bottom: 12px;
  left: 50%;
  transform: translateX(-50%);
  font-size: 11px;
  color: #A8B5C7;
  white-space: nowrap;
}

/* ---- 留资（白卡） ---- */
.dl-lead {
  margin-top: 44px;
  background: #fff;
  border-radius: var(--r-lg);
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.28);
  padding: 36px 40px 40px;
}

.dl-lead-eyebrow {
  font-family: "JetBrains Mono", monospace;
  font-size: 11px;
  color: var(--accent);
  letter-spacing: 0.15em;
  text-transform: uppercase;
  margin-bottom: 10px;
}

.dl-lead-head h2 {
  font-family: "Barlow Condensed", "Noto Sans SC", sans-serif;
  font-size: 28px;
  font-weight: 700;
  color: var(--ink);
  margin-bottom: 8px;
}

.dl-lead-head p { font-size: 13.5px; color: var(--mute); margin-bottom: 24px; }

.dl-lead-form {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px 20px;
}

.dl-field { display: flex; flex-direction: column; gap: 7px; }
.dl-field.full { grid-column: 1 / -1; }

.dl-field label { font-size: 12.5px; color: var(--ink); font-weight: 500; }
.dl-field .req { color: var(--danger); }

.dl-field input,
.dl-field textarea {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: var(--r-sm);
  padding: 11px 13px;
  font-size: 13.5px;
  font-family: "Noto Sans SC", sans-serif;
  color: var(--ink);
  background: var(--bg, #F6F8FB);
  transition: border-color var(--t-fast), background var(--t-fast);
}

.dl-field textarea { min-height: 84px; resize: vertical; }

.dl-field input:focus,
.dl-field textarea:focus {
  outline: none;
  border-color: var(--accent);
  background: #fff;
}

.dl-submit-row {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
  margin-top: 4px;
}

.dl-submit {
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: var(--r-sm);
  padding: 13px 32px;
  font-size: 14.5px;
  font-weight: 600;
  font-family: "Noto Sans SC", sans-serif;
  cursor: pointer;
  transition: opacity var(--t-fast);
}

.dl-submit:hover { opacity: 0.9; }
.dl-submit:disabled { opacity: 0.5; cursor: not-allowed; }

.dl-lead-msg { font-size: 12.5px; color: var(--mute); }
.dl-lead-msg.err { color: var(--danger); }

@media (max-width: 1024px) {
  .dl-hero { grid-template-columns: 1fr; gap: 28px; }
  .dl-hero-visual { order: -1; min-height: 0; }
  .dl-hero-text h1 { font-size: 36px; }
}

@media (max-width: 640px) {
  .dl-gate-inner { padding: 40px 20px 52px; }
  .dl-lead { padding: 26px 22px 30px; }
  .dl-lead-form { grid-template-columns: 1fr; }
  .dl-hero-text h1 { font-size: 30px; }
}