@import url('https://fonts.googleapis.com/css2?family=DM+Sans:ital,opsz,wght@0,9..40,400;0,9..40,500;0,9..40,600;0,9..40,700;1,9..40,400&family=Noto+Sans+SC:wght@400;500;600;700&display=swap');

/* ===== 全局基础 ===== */
* { margin: 0; padding: 0; box-sizing: border-box; }
body {
  font-family: "DM Sans", "Noto Sans SC", -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif;
  color: #0A2540;
  background: #fff;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; height: auto; display: block; }
.img-cover { width: 100%; height: 100%; object-fit: cover; }
.img-contain { width: 100%; height: 100%; object-fit: contain; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 32px; }
a { color: inherit; text-decoration: none; }
a:focus-visible,
button:focus-visible,
.btn-primary:focus-visible,
.cta-btn-primary:focus-visible,
.cta-btn-outline:focus-visible,
.form-submit:focus-visible,
.nav-menu a:focus-visible {
  outline: 2px solid #FF6B35;
  outline-offset: 2px;
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* ===== 导航栏 ===== */
nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  background: rgba(255,255,255,0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(0,0,0,0.06);
}
nav .container {
  display: flex; align-items: center; justify-content: space-between;
  height: 72px;
}
.logo { font-size: 22px; font-weight: 700; letter-spacing: -0.5px; }
.logo span { font-size: 13px; color: #8B95A1; margin-left: 8px; font-weight: 400; }
.nav-menu { display: flex; gap: 40px; list-style: none; }
.nav-menu a {
  color: #0A2540; font-size: 15px; font-weight: 500;
  transition: color 0.2s; padding-bottom: 4px;
}
.nav-menu a:hover { color: #FF6B35; }
.nav-menu a.active {
  color: #FF6B35;
  border-bottom: 2px solid #FF6B35;
}
.nav-right { display: flex; align-items: center; gap: 24px; }
.nav-toggle {
  display: none; background: none; border: none; cursor: pointer;
  width: 40px; height: 40px; padding: 8px; border-radius: 6px;
}
.nav-toggle span {
  display: block; width: 22px; height: 2px; background: #0A2540;
  margin: 5px auto; transition: all 0.25s; border-radius: 1px;
}
.nav-toggle.active span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.active span:nth-child(2) { opacity: 0; }
.nav-toggle.active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
.lang { font-size: 14px; color: #8B95A1; cursor: pointer; }

/* 语言切换 */
.lang-switch {
  display: flex; align-items: center; gap: 2px;
  background: #F0F3F7; border-radius: 8px; padding: 3px;
  max-width: 100%;
}
.lang-btn {
  border: none; background: transparent; cursor: pointer;
  font-size: 11px; font-weight: 600; color: #5A6B7C;
  padding: 6px 8px; border-radius: 6px; line-height: 1;
  font-family: inherit; transition: all 0.2s;
}
.lang-btn:hover { color: #0A2540; }
.lang-btn.active {
  background: #fff; color: #0A2540;
  box-shadow: 0 1px 4px rgba(10,37,64,0.1);
}
.lang-btn:focus-visible {
  outline: 2px solid #FF6B35; outline-offset: 2px;
}

/* 多语言字体 */
body.lang-ja {
  font-family: "DM Sans", "Noto Sans JP", "Noto Sans SC", -apple-system, sans-serif;
}
body.lang-en .logo span { display: none !important; }
body.lang-ja .logo span { display: none !important; }
body.lang-ko .logo span { display: none !important; }
body.lang-ko {
  font-family: "DM Sans", "Noto Sans KR", "Noto Sans SC", -apple-system, sans-serif;
}

.btn-primary {
  background: #FF6B35; color: #fff; padding: 10px 22px;
  border-radius: 6px; font-size: 14px;
  font-weight: 600; transition: background 0.2s;
  display: inline-block;
}
.btn-primary:hover { background: #e85a25; }
.btn-primary.large { padding: 14px 28px; font-size: 15px; }
.btn-secondary {
  background: transparent; color: #fff; padding: 14px 28px;
  border: 1px solid rgba(255,255,255,0.3); border-radius: 6px;
  font-size: 15px; font-weight: 500; transition: all 0.2s;
  display: inline-block;
}
.btn-secondary:hover { background: rgba(255,255,255,0.1); border-color: #fff; }

/* ===== 页面顶部 Banner（非首页） ===== */
.page-banner {
  background: linear-gradient(135deg, #0A2540 0%, #1B3A5C 100%);
  color: #fff; padding: 180px 0 100px;
  position: relative; overflow: hidden;
}
.page-banner::before {
  content: ''; position: absolute; top: 0; right: 0;
  width: 50%; height: 100%;
  background: radial-gradient(circle at 70% 50%, rgba(255,107,53,0.12), transparent 60%);
}
.page-banner .container { position: relative; z-index: 2; }
.banner-tag {
  display: inline-block; padding: 6px 14px;
  background: rgba(255,107,53,0.12); color: #FF6B35;
  border-radius: 20px; font-size: 13px; font-weight: 500;
  margin-bottom: 24px; letter-spacing: 0.5px;
}
.page-banner h1 {
  font-size: 52px; font-weight: 700; letter-spacing: -1px;
  line-height: 1.2; margin-bottom: 20px;
}
.page-banner h1 em { color: #FF6B35; font-style: normal; }
.page-banner p {
  font-size: 18px; color: rgba(255,255,255,0.72);
  max-width: 640px; line-height: 1.6; font-weight: 300;
}

/* 产品中心 Banner 配图 */
.page-banner--products {
  padding: 160px 0 88px;
}
.page-banner--products .page-banner-inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(260px, 44%);
  gap: clamp(24px, 4vw, 56px);
  align-items: center;
}
.page-banner--products .page-banner-copy { max-width: 640px; }
.page-banner--products .page-banner-copy p { max-width: none; }
.page-banner-visual {
  position: relative;
  display: flex;
  justify-content: flex-end;
  align-items: center;
  min-height: 0;
}
.page-banner-visual::before {
  content: '';
  position: absolute;
  inset: -8% -6% -8% 18%;
  background: radial-gradient(ellipse at 58% 50%, rgba(255,107,53,0.14), transparent 62%);
  pointer-events: none;
  z-index: 0;
}
.page-banner-visual img {
  position: relative;
  z-index: 1;
  width: 100%;
  max-width: min(480px, 100%);
  height: auto;
  object-fit: contain;
  mix-blend-mode: lighten;
  filter: contrast(1.04) saturate(1.05);
  -webkit-mask-image: linear-gradient(90deg, transparent 0%, #000 22%, #000 100%);
  mask-image: linear-gradient(90deg, transparent 0%, #000 22%, #000 100%);
}

/* ===== 通用 Section ===== */
section { padding: 100px 0; }
.section-tag {
  color: #FF6B35; font-size: 13px; font-weight: 600;
  letter-spacing: 1.5px; text-transform: uppercase; margin-bottom: 18px;
}
.section-title {
  font-size: 42px; font-weight: 700; letter-spacing: -1px;
  margin-bottom: 24px; line-height: 1.25;
}
.section-title em { color: #FF6B35; font-style: normal; }
.section-subtitle {
  font-size: 18px; color: #5A6B7C; max-width: 720px; margin-bottom: 64px;
  line-height: 1.65;
}

/* ===== 数据墙 ===== */
.stats {
  background: #0A2540; color: #fff;
  background-image: radial-gradient(circle at 80% 50%, rgba(255,107,53,0.08), transparent 50%);
}
.stats .section-title { color: #fff; }
.stats .section-subtitle { color: rgba(255,255,255,0.6); }
.stats-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 48px 64px;
}
.stat-item { border-left: 2px solid #FF6B35; padding-left: 24px; }
.stat-num {
  font-size: 54px; font-weight: 700; letter-spacing: -2px;
  line-height: 1; margin-bottom: 10px;
}
.stat-num small { font-size: 20px; color: #FF6B35; font-weight: 600; }
.stat-label { font-size: 14px; color: rgba(255,255,255,0.7); }

/* ===== CTA 区 ===== */
.cta-section {
  background: linear-gradient(135deg, #0A2540 0%, #1B3A5C 100%);
  color: #fff; text-align: center; padding: 100px 0;
}
.cta-section h2 {
  font-size: 42px; font-weight: 700; margin-bottom: 16px; letter-spacing: -1px;
}
.cta-section p {
  font-size: 16px; opacity: 0.75; margin-bottom: 36px;
  max-width: 560px; margin-left: auto; margin-right: auto;
}
.cta-buttons { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }
.cta-btn-primary {
  background: #FF6B35; color: #fff; padding: 16px 32px;
  border-radius: 6px; font-weight: 600; display: inline-block;
  transition: background 0.2s;
}
.cta-btn-primary:hover { background: #e85a25; }
.cta-btn-outline {
  background: transparent; color: #fff; padding: 16px 32px;
  border-radius: 6px; font-weight: 600; display: inline-block;
  border: 1px solid rgba(255,255,255,0.3);
  transition: all 0.2s;
}
.cta-btn-outline:hover { background: rgba(255,255,255,0.08); border-color: #fff; }

/* ===== 封底定位语 ===== */
.tagline-band {
  background: #050F1C; color: rgba(255,255,255,0.9); text-align: center;
  padding: 56px 32px;
}
.tagline-band p {
  font-size: 18px; font-weight: 400; line-height: 1.6;
  max-width: 800px; margin: 0 auto; letter-spacing: 0.3px;
}
.tagline-band strong { color: #fff; font-weight: 600; }

/* ===== Footer ===== */
footer {
  background: #0A2540; color: rgba(255,255,255,0.6);
  padding: 60px 0 30px; font-size: 14px;
}
.footer-grid {
  display: grid; grid-template-columns: 1.6fr 1fr 1fr 1.4fr; gap: 48px;
  margin-bottom: 40px;
}
footer h5 { color: #fff; margin-bottom: 16px; font-size: 15px; }
footer ul { list-style: none; }
footer li { margin-bottom: 8px; }
footer a:hover { color: #FF6B35; }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding-top: 24px; display: flex; justify-content: space-between;
  font-size: 13px; flex-wrap: wrap; gap: 12px;
}

/* ===== Hero（首页专用） ===== */
.hero {
  min-height: 100vh;
  background: linear-gradient(135deg, #0A2540 0%, #1B3A5C 100%);
  color: #fff; position: relative; overflow: hidden;
}
.hero::before {
  content: ''; position: absolute; top: 0; right: 0;
  width: 50%; height: 100%; z-index: 1;
  background: radial-gradient(circle at 80% 50%, rgba(255,107,53,0.1), transparent 55%);
  pointer-events: none;
}
.hero .container {
  position: relative; z-index: 3;
  max-width: none;
  width: 100%;
  margin: 0;
  padding: calc(72px + 72px) clamp(40px, 6vw, 96px) 80px clamp(40px, 6vw, 96px);
  min-height: 100vh;
  box-sizing: border-box;
}
.hero-content {
  max-width: 520px;
  width: min(520px, 38vw);
}
.hero-media {
  position: absolute; top: 0; right: 0;
  width: 58%; height: 100%;
  z-index: 2; overflow: hidden;
}
.hero-video {
  width: 100%; height: 100%;
  object-fit: cover;
  object-position: center center;
  display: block;
}
.hero-media-overlay {
  position: absolute; inset: 0; z-index: 1;
  background:
    linear-gradient(100deg,
      #0A2540 0%,
      rgba(10, 37, 64, 0.95) 14%,
      rgba(10, 37, 64, 0.72) 26%,
      rgba(27, 58, 92, 0.35) 42%,
      rgba(27, 58, 92, 0.08) 58%,
      transparent 72%),
    linear-gradient(to top, #0A2540 0%, transparent 28%),
    linear-gradient(to bottom, rgba(10, 37, 64, 0.5) 0%, transparent 22%);
  pointer-events: none;
}
.hero-tag {
  display: inline-block; padding: 6px 14px;
  background: rgba(255,107,53,0.12); color: #FF6B35;
  border-radius: 20px; font-size: 13px; font-weight: 500;
  margin-bottom: 28px; letter-spacing: 0.5px;
}
.hero h1 {
  font-size: 60px; font-weight: 700; line-height: 1.15;
  letter-spacing: -1.5px; margin-bottom: 28px;
}
.hero-sub {
  font-size: 18px; color: rgba(255,255,255,0.72);
  margin-bottom: 44px; font-weight: 300; line-height: 1.6;
  max-width: 520px;
}
.hero-sub-nowrap {
  white-space: nowrap;
  max-width: none;
  font-size: clamp(14px, 1.25vw, 19px);
}
.hero-cta { display: flex; gap: 16px; }
.hero h1 em, .hero-em-keep { color: #FF6B35; font-style: normal; }
.hero-em-keep { white-space: nowrap; }

/* ===== 首页价值陈述 ===== */
.value-narrative { background: linear-gradient(180deg, #fff 0%, #F7F9FC 100%); }
.value-narrative .section-title { margin-bottom: 64px; }
.narrative-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 32px;
}
.narrative-card {
  background: #fff; padding: 0; border-radius: 12px;
  border: 1px solid rgba(10,37,64,0.06);
  transition: all 0.3s; overflow: hidden;
}
.narrative-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 16px 40px rgba(10,37,64,0.08);
  border-color: rgba(255,107,53,0.2);
}
.narrative-content { padding: 36px 32px; }
.narrative-label {
  font-size: 12px; color: #FF6B35; font-weight: 700;
  letter-spacing: 1.5px; margin-bottom: 14px; text-transform: uppercase;
}
.narrative-content h3 {
  font-size: 22px; font-weight: 700; margin-bottom: 14px; color: #0A2540;
}
.narrative-content p {
  font-size: 15px; color: #5A6B7C; line-height: 1.7;
}

/* ===== 通用卡片网格 ===== */
.why-us { background: #fff; }
.why-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
.why-card {
  background: #F7F9FC; padding: 40px; border-radius: 12px;
  transition: all 0.3s; border: 1px solid transparent;
}
.why-card:hover {
  background: #fff;
  box-shadow: 0 16px 40px rgba(10,37,64,0.08);
  border-color: rgba(255,107,53,0.15);
  transform: translateY(-4px);
}
.why-head { display: flex; align-items: center; gap: 14px; margin-bottom: 16px; }
.why-num {
  width: 32px; height: 32px; border-radius: 8px;
  background: #0A2540; color: #fff;
  display: flex; align-items: center; justify-content: center;
  font-size: 13px; font-weight: 700;
}
.why-card h3 {
  font-size: 20px; font-weight: 700; color: #0A2540; line-height: 1.3;
}
.why-card p { font-size: 15px; color: #5A6B7C; line-height: 1.7; }

/* ===== 知识产权板块（新增） ===== */
.ip-section { background: #F7F9FC; }
.ip-stats {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px;
  margin-bottom: 48px;
}
.ip-stat {
  background: #fff; padding: 32px 28px; border-radius: 12px;
  border: 1px solid rgba(10,37,64,0.06);
  transition: all 0.3s;
}
.ip-stat:hover {
  transform: translateY(-3px);
  box-shadow: 0 12px 32px rgba(10,37,64,0.06);
}
.ip-num {
  font-size: 42px; font-weight: 700; color: #FF6B35;
  letter-spacing: -1.5px; line-height: 1; margin-bottom: 10px;
}
.ip-num small { font-size: 20px; font-weight: 600; }
.ip-label {
  font-size: 14px; color: #0A2540; font-weight: 600;
  margin-bottom: 4px;
}
.ip-sublabel {
  font-size: 12px; color: #8B95A1; margin-top: 4px;
}
.ip-promise {
  display: grid; grid-template-columns: 1fr 1fr; gap: 24px;
}
.ip-card {
  background: #fff; padding: 28px 32px; border-radius: 10px;
  border-left: 3px solid #FF6B35;
}
.ip-card h4 {
  font-size: 18px; font-weight: 700; color: #0A2540; margin-bottom: 10px;
}
.ip-card p {
  font-size: 14px; color: #5A6B7C; line-height: 1.7;
}

/* ===== 合作方式卡片 ===== */
.cooperation { background: #F7F9FC; }
.coop-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 32px; }
.coop-card {
  background: #fff; padding: 48px;
  border-radius: 14px; transition: all 0.3s;
  border: 1px solid rgba(10,37,64,0.04);
}
.coop-card:hover {
  box-shadow: 0 20px 50px rgba(10,37,64,0.1);
  transform: translateY(-4px);
}
.coop-label {
  font-size: 12px; color: #FF6B35; font-weight: 700;
  letter-spacing: 1.5px; margin-bottom: 16px;
}
.coop-card h3 {
  font-size: 24px; font-weight: 700; margin-bottom: 16px; color: #0A2540;
}
.coop-card p {
  font-size: 15px; color: #5A6B7C; line-height: 1.7; margin-bottom: 20px;
}
.coop-meta {
  display: flex; flex-wrap: wrap; gap: 12px 24px; padding-top: 20px;
  border-top: 1px solid rgba(10,37,64,0.06);
  font-size: 13px; color: #8B95A1; line-height: 1.5;
}
.coop-meta span { min-width: 0; }
.coop-meta strong { color: #0A2540; font-weight: 600; }

/* ===== 合作伙伴 ===== */
.partners-section { background: #fff; }
.partners-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 20px;
  align-items: center; margin-bottom: 56px;
}
.partner-logo {
  height: 84px; background: #F7F9FC; border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
  color: #8B95A1; font-size: 14px; font-weight: 600;
  filter: grayscale(1); opacity: 0.65;
  transition: all 0.3s;
  border: 1px solid rgba(10,37,64,0.04);
  text-align: center; padding: 0 12px;
}
.partner-logo:hover { filter: grayscale(0); opacity: 1; transform: translateY(-2px); }

/* ===== 产品系列卡片 ===== */
.product-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px;
  margin-bottom: 32px;
}
.product-card {
  background: #fff; border-radius: 12px; overflow: hidden;
  border: 1px solid rgba(10,37,64,0.06);
  transition: all 0.3s;
}
.product-card[id] { scroll-margin-top: 88px; }
.product-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 20px 50px rgba(10,37,64,0.1);
}
.product-img {
  height: 240px; overflow: hidden;
  background: #F7F9FC;
}
.product-img img { width: 100%; height: 100%; object-fit: cover; }
.product-img--photo {
  background: linear-gradient(135deg, #0A2540 0%, #1B3A5C 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 28px 24px;
}
.product-img--photo img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  mix-blend-mode: lighten;
  filter: contrast(1.04);
}
.product-img--dual {
  display: grid;
  grid-template-columns: 1fr;
  grid-template-rows: 1fr 1fr;
  gap: 12px;
  padding: 20px 24px;
}
.product-img--dual img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}
.product-info { padding: 32px; }
.product-info .product-label {
  font-size: 12px; color: #FF6B35; font-weight: 700;
  letter-spacing: 1.5px; margin-bottom: 12px;
}
.product-info h3 { font-size: 22px; margin-bottom: 20px; color: #0A2540; }
.product-specs {
  padding-top: 20px; border-top: 1px solid rgba(10,37,64,0.06);
}
.product-spec-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 12px;
  line-height: 1.4;
}
.product-spec-table th,
.product-spec-table td {
  padding: 8px 6px;
  text-align: center;
  border: 1px solid rgba(10,37,64,0.1);
  color: #0A2540;
}
.product-spec-table th {
  font-weight: 600;
  background: #FF6B35;
  color: #fff;
  border-color: rgba(255,107,53,0.35);
}
.product-spec-table td { color: #5A6B7C; }

.product-highlights {
  display: grid;
  grid-template-columns: 1fr 1fr;
  border: 1px solid rgba(10,37,64,0.08);
  border-radius: 4px;
  overflow: hidden;
  background: #fff;
}
.product-highlight-card {
  padding: 36px 40px 36px 32px;
  border-left: 6px solid #FF6B35;
  display: flex;
  flex-direction: column;
  justify-content: center;
  min-height: 140px;
}
.product-highlight-card + .product-highlight-card {
  border-left: 6px solid #FF6B35;
  box-shadow: inset 1px 0 0 rgba(10,37,64,0.08);
}
.product-highlight-label {
  font-size: 13px;
  font-weight: 700;
  color: #FF6B35;
  letter-spacing: 0.04em;
  margin-bottom: 14px;
}
.product-highlight-title {
  font-size: clamp(22px, 2.2vw, 28px);
  font-weight: 700;
  color: #0A2540;
  line-height: 1.35;
  margin-bottom: 10px;
}
.product-highlight-note {
  font-size: 14px;
  font-style: italic;
  color: #8B95A1;
  line-height: 1.5;
}

/* ===== 产品下载模块（新增） ===== */
.download-section { background: #F7F9FC; padding: 100px 0; }
.download-intro {
  text-align: center; max-width: 720px; margin: 0 auto 40px;
}
.download-footer-note {
  text-align: center; margin-top: 32px;
  font-size: 13px; color: #8B95A1;
}
.download-footer-note a {
  color: #FF6B35; font-weight: 600; text-decoration: none;
}
.download-footer-note a:hover { text-decoration: underline; }
a.download-btn { text-decoration: none; }

/* 资料下载表（三列） */
.download-table.download-table--single {
  display: block;
  width: 100%;
  max-width: 100%;
  margin: 0;
}
.download-table--single .download-row {
  grid-template-columns: 200px minmax(0, 1fr) 200px;
  column-gap: 40px;
  align-items: center;
  padding: 18px 28px;
  min-height: 0;
}
.download-table--single .download-row:first-child {
  padding: 14px 28px;
  min-height: 0;
}
.download-table--single .download-row:first-child > div:last-child {
  text-align: center;
}
.download-table--single .download-row:not(:first-child) {
  min-height: 76px;
}
.download-table--single .download-spec {
  font-size: 15px;
  line-height: 1.45;
  font-weight: 600;
  color: #0A2540;
  white-space: nowrap;
}
.download-table--single .download-detail {
  font-size: 14px;
  line-height: 1.65;
  color: #5A6B7C;
  white-space: nowrap;
}
.download-table--single .download-action {
  align-items: center;
  justify-content: center;
  gap: 8px;
  width: 100%;
  min-width: 0;
  text-align: center;
}
.download-table--single .download-note {
  font-size: 11px;
  line-height: 1.45;
  color: #8B95A1;
  max-width: none;
  white-space: nowrap;
}
.download-action {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 10px;
}
.download-note {
  font-size: 12px;
  color: #8B95A1;
  line-height: 1.5;
}
.download-tabs {
  display: flex; justify-content: center; gap: 8px;
  margin-bottom: 40px; flex-wrap: wrap;
}
.download-tab {
  padding: 10px 24px; background: #fff;
  border: 1px solid rgba(10,37,64,0.08);
  border-radius: 24px; font-size: 14px; font-weight: 600;
  color: #5A6B7C; cursor: pointer; transition: all 0.2s;
}
.download-tab.active {
  background: #0A2540; color: #fff; border-color: #0A2540;
}
.download-tab:hover:not(.active) {
  border-color: #FF6B35; color: #FF6B35;
}
.download-table {
  background: #fff; border-radius: 12px; overflow: hidden;
  border: 1px solid rgba(10,37,64,0.06);
  display: none;
}
.download-table.active { display: block; }
.download-sku-section { margin-top: 56px; }
.download-table-scroll {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  margin: 0 -4px;
  padding: 0 4px;
}
.download-table--sku {
  width: 100%;
  min-width: 1040px;
}
.download-table--sku .download-row {
  grid-template-columns:
    52px
    minmax(300px, 1.15fr)
    minmax(168px, 0.75fr)
    96px
    96px
    96px;
  column-gap: 24px;
  align-items: center;
  padding: 15px 28px;
}
.download-table--sku .download-row--head {
  padding: 14px 28px;
}
.download-table--sku .download-row--head > div:nth-child(n+4) {
  text-align: right;
}
.sku-series {
  font-size: 13px;
  font-weight: 700;
  color: #FF6B35;
  letter-spacing: 0.02em;
  white-space: nowrap;
}
.sku-code {
  font-size: 12px;
  color: #0A2540;
  font-weight: 500;
  font-family: ui-monospace, 'SF Mono', Menlo, monospace;
  line-height: 1.4;
  white-space: nowrap;
}
.sku-name {
  font-size: 14px;
  color: #0A2540;
  font-weight: 600;
  white-space: nowrap;
}
.sku-dim {
  font-size: 13px;
  color: #5A6B7C;
  text-align: right;
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}
.download-sku-note {
  text-align: center; margin-top: 20px;
  font-size: 12px; color: #8B95A1;
}
.part-number-guide {
  margin: 40px auto 0;
  max-width: 100%;
}
.part-number-guide img {
  width: 100%;
  height: auto;
  display: block;
  border-radius: 16px;
  box-shadow: 0 8px 32px rgba(10, 37, 64, 0.08);
}

/* ===== Part Number Guide (i18n HTML component) ===== */
.png-card{
  margin:40px auto 0;
  background:linear-gradient(180deg,#FFFFFF 0%,#F7F9FC 100%);
  border-radius:16px;
  padding:48px 60px 36px;
  box-shadow:0 8px 32px rgba(10,37,64,0.08);
  position:relative;
  overflow:hidden;
}
.png-card::before{
  content:"";position:absolute;top:0;left:0;right:0;height:4px;
  background:linear-gradient(90deg,#FF6B35,#FF8F66);
}
.png-eyebrow{
  font-family:"DM Sans",sans-serif;font-size:13px;font-weight:600;
  color:#FF6B35;letter-spacing:2px;
}
.png-title{
  font-size:32px;font-weight:700;color:#0A2540;margin:8px 0 6px;line-height:1.2;
}
.png-subtitle{font-size:15px;color:#5A6B7C;margin:0 0 24px;}

.png-main-card{
  background:#FFFFFF;border-radius:16px;padding:24px 28px;
  box-shadow:0 6px 24px rgba(10,37,64,0.07);
}
.png-example-label{
  font-size:14px;font-weight:600;color:#8B95A1;margin-bottom:14px;
}
.png-chips{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:12px;}
.png-chip{
  font-family:ui-monospace,'SF Mono',Menlo,monospace;font-size:20px;font-weight:600;
  padding:9px 16px;border-radius:8px;line-height:1;display:flex;align-items:center;
}
.png-chip--gray{background:#F0F3F7;color:#8B95A1;}
.png-chip--orange{background:#FFF0EA;color:#FF6B35;border:1.5px solid #FF6B35;}
.png-chip--blue{background:#EDF1F6;color:#0A2540;border:1.5px solid #0A2540;}
.png-chip--purple{background:#F0F3F7;color:#5A6B7C;border:1.5px solid #5A6B7C;}
.png-chip--gray-dash{background:#F0F3F7;color:#8B95A1;border:1.5px dashed #8B95A1;}
.png-full-code{
  font-family:ui-monospace,'SF Mono',Menlo,monospace;font-size:14px;color:#8B95A1;margin-bottom:18px;
}
.png-divider{height:1px;background:#E8EDF3;margin:4px 0 18px;}
.png-legend{display:grid;grid-template-columns:1fr 1fr;gap:10px;}
.png-legend-item{
  display:flex;align-items:center;gap:10px;padding:8px 14px;border-radius:8px;font-size:13px;
}
.png-legend-item--orange{background:#FFF8F5;border:1px solid #FFD4C2;}
.png-legend-item--blue{background:#F5F7FA;border:1px solid #C8D3E0;}
.png-legend-item--purple{background:#F0F3F7;border:1px solid #C5CDD6;}
.png-legend-item--gray{background:#F0F3F7;border:1px dashed #C5CDD6;}
.png-dot{width:9px;height:9px;border-radius:50%;flex-shrink:0;}
.png-dot--orange{background:#FF6B35;}
.png-dot--blue{background:#0A2540;}
.png-dot--purple{background:#5A6B7C;}
.png-dot--gray{background:#8B95A1;}
.png-legend-label{font-weight:600;color:#0A2540;white-space:nowrap;}
.png-legend-val{color:#5A6B7C;}

.png-dim-title{font-size:18px;font-weight:600;color:#0A2540;margin:28px 0 14px;}
.png-drawings{display:grid;grid-template-columns:1fr 1fr;gap:20px;}
.png-drawing-card{
  background:#FFFFFF;border-radius:16px;padding:20px 24px;
  box-shadow:0 6px 24px rgba(10,37,64,0.07);
}
.png-drawing-label{font-size:14px;font-weight:600;color:#8B95A1;margin-bottom:10px;}
.png-drawing-svg{display:flex;justify-content:center;margin:6px 0 12px;}
.png-drawing-svg svg{width:100%;max-width:420px;height:auto;}
.png-drawing-desc{font-size:13px;color:#5A6B7C;text-align:center;margin:4px 0;}
.png-drawing-desc2{font-size:12px;color:#8B95A1;text-align:center;margin:2px 0 0;}

.png-calc{
  background:#0A2540;border-radius:16px;padding:22px 28px;margin-top:20px;
}
.png-calc-title{font-size:16px;font-weight:600;color:#FFFFFF;margin-bottom:14px;}
.png-calc-boxes{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;}
.png-calc-box{
  background:rgba(255,255,255,0.08);border-radius:8px;padding:12px 18px;
  font-family:"DM Sans",sans-serif;font-size:18px;font-weight:700;color:#FFFFFF;
}
.png-calc-result{color:#FF6B35;}

.png-foot{
  display:flex;justify-content:space-between;align-items:center;
  margin-top:22px;font-size:13px;color:#8B95A1;
}
.png-brand{font-family:"DM Sans",sans-serif;font-weight:600;color:#FF6B35;}

@media (max-width:760px){
  .png-card{padding:32px 20px 24px;}
  .png-title{font-size:24px;}
  .png-legend{grid-template-columns:1fr;}
  .png-drawings{grid-template-columns:1fr;}
  .png-calc-boxes{grid-template-columns:1fr;}
  .png-chip{font-size:16px;padding:7px 12px;}
}
.download-row {
  display: grid; grid-template-columns: 1fr 1fr 1fr 1fr;
  align-items: center; padding: 18px 28px;
  border-top: 1px solid rgba(10,37,64,0.04);
  transition: background 0.2s;
}
.download-row:first-child {
  background: #F7F9FC; border-top: none;
  font-size: 12px; font-weight: 700; color: #8B95A1;
  letter-spacing: 1px; text-transform: uppercase;
  padding: 14px 28px;
}
.download-row:not(:first-child):hover { background: #FAFBFD; }
.download-spec { font-size: 15px; color: #0A2540; font-weight: 600; }
.download-detail { font-size: 14px; color: #5A6B7C; }
.download-btn {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 8px 16px; border-radius: 6px;
  font-size: 13px; font-weight: 600;
  background: #F7F9FC; color: #0A2540;
  border: 1px solid rgba(10,37,64,0.08);
  transition: all 0.2s; cursor: pointer; width: fit-content;
}
.download-btn:hover {
  background: #FF6B35; color: #fff; border-color: #FF6B35;
}
.download-btn.pdf { color: #C8453A; }
.download-btn.pdf:hover { background: #C8453A; color: #fff; border-color: #C8453A; }
.download-btn.stp { color: #C8453A; }
.download-btn.stp:hover { background: #C8453A; color: #fff; border-color: #C8453A; }

/* ===== 制造能力页 ===== */
.mfg-intro { background: #fff; }
.mfg-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: center; }
.mfg-text h2 { font-size: 42px; margin-bottom: 20px; line-height: 1.3; }
.mfg-text p { font-size: 16px; color: #5A6B7C; line-height: 1.8; margin-bottom: 16px; }
.mfg-image {
  border-radius: 14px; overflow: hidden;
  background: #F7F9FC;
  border: 1px solid rgba(10,37,64,0.06);
  aspect-ratio: 1200 / 534;
}
.mfg-image img { display: block; width: 100%; height: 100%; object-fit: cover; object-position: center 42%; }
.mfg-image--building {
  aspect-ratio: 7 / 5;
}
.mfg-image--building img { object-position: center 38%; }
.equipment-grid {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px;
}
.equipment-card {
  background: #fff; padding: 28px 24px; border-radius: 10px;
  border: 1px solid rgba(10,37,64,0.06);
  text-align: center; transition: all 0.3s;
}
.equipment-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 16px 40px rgba(10,37,64,0.08);
}
.equipment-icon {
  width: 56px; height: 56px; margin: 0 auto 16px;
  background: rgba(255,107,53,0.1); color: #FF6B35;
  border-radius: 12px;
  display: flex; align-items: center; justify-content: center;
  font-size: 20px; font-weight: 700;
}
.equipment-card h4 { font-size: 15px; margin-bottom: 6px; color: #0A2540; }
.equipment-card p { font-size: 13px; color: #8B95A1; line-height: 1.5; }

/* ===== 关于我们 ===== */
.about-intro { background: #fff; }
.about-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: center; }
.values-intro {
  font-size: 17px; color: #2A3D52; font-weight: 500;
  margin-bottom: 14px; line-height: 1.6;
}
.timeline {
  position: relative; padding-left: 32px;
  border-left: 2px solid rgba(255,107,53,0.2);
}
.timeline-item { margin-bottom: 40px; position: relative; }
.timeline-item::before {
  content: ''; position: absolute; left: -41px; top: 6px;
  width: 16px; height: 16px; border-radius: 50%;
  background: #FF6B35; border: 4px solid #fff;
  box-shadow: 0 0 0 2px #FF6B35;
}
.timeline-year {
  font-size: 14px; color: #FF6B35; font-weight: 700;
  letter-spacing: 1px; margin-bottom: 6px;
}
.timeline-item h4 { font-size: 18px; margin-bottom: 6px; color: #0A2540; }
.timeline-item p { font-size: 14px; color: #5A6B7C; line-height: 1.6; }

.values-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.values-card {
  background: #fff; padding: 36px 28px; border-radius: 12px;
  border: 1px solid rgba(10,37,64,0.06); transition: all 0.3s;
}
.values-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 16px 40px rgba(10,37,64,0.08);
  border-color: rgba(255,107,53,0.2);
}
.values-card h3 {
  font-size: 18px; margin-bottom: 12px; color: #0A2540;
}
.values-card p { font-size: 14px; color: #5A6B7C; line-height: 1.7; }

/* ===== 联系我们 ===== */
.contact-grid {
  display: grid; grid-template-columns: 1fr 1.2fr; gap: 48px;
}
.contact-info { padding: 40px; background: #F7F9FC; border-radius: 14px; }
.contact-info h3 { font-size: 22px; margin-bottom: 24px; }
.contact-item { margin-bottom: 24px; padding-bottom: 24px; border-bottom: 1px solid rgba(10,37,64,0.06); }
.contact-item:last-child { border-bottom: none; }
.contact-item-label {
  font-size: 12px; color: #FF6B35; font-weight: 700;
  letter-spacing: 1.5px; margin-bottom: 8px; text-transform: uppercase;
}
.contact-item-value { font-size: 15px; color: #0A2540; line-height: 1.7; }

.contact-form { padding: 40px; background: #fff; border-radius: 14px; border: 1px solid rgba(10,37,64,0.06); }
.contact-form h3 { font-size: 22px; margin-bottom: 24px; }
.form-group { margin-bottom: 20px; }
.form-group label {
  display: block; font-size: 13px; font-weight: 600;
  color: #0A2540; margin-bottom: 8px;
}
.form-group input, .form-group select, .form-group textarea {
  width: 100%; padding: 12px 16px;
  border: 1px solid rgba(10,37,64,0.12);
  border-radius: 6px; font-size: 14px;
  font-family: inherit; color: #0A2540;
  transition: border-color 0.2s;
}
.form-group input:focus, .form-group select:focus, .form-group textarea:focus {
  outline: none; border-color: #FF6B35;
}
.form-group textarea { resize: vertical; min-height: 100px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-submit {
  background: #FF6B35; color: #fff; padding: 14px 32px;
  border: none; border-radius: 6px; font-size: 15px;
  font-weight: 600; cursor: pointer; transition: background 0.2s;
}
.form-submit:hover { background: #e85a25; }
.form-submit:disabled { opacity: 0.6; cursor: not-allowed; }
.form-status { margin-top: 12px; font-size: 14px; min-height: 20px; line-height: 1.5; }

.download-btn.disabled {
  opacity: 0.45; cursor: not-allowed; pointer-events: none;
}

/* ===== 响应式 ===== */
@media (max-width: 968px) {
  .nav-toggle { display: block; }
  .nav-menu {
    display: none; position: absolute; top: 72px; left: 0; right: 0;
    background: rgba(255,255,255,0.98); backdrop-filter: blur(12px);
    flex-direction: column; gap: 0; padding: 16px 32px 24px;
    border-bottom: 1px solid rgba(0,0,0,0.06);
    box-shadow: 0 8px 24px rgba(10,37,64,0.08);
  }
  .nav-menu.open { display: flex; }
  .nav-menu li { padding: 12px 0; border-bottom: 1px solid rgba(10,37,64,0.04); }
  .nav-menu li:last-child { border-bottom: none; }
  nav .container { position: relative; }
  .nav-right { gap: 12px; }
  .nav-right .btn-primary { padding: 8px 14px; font-size: 13px; white-space: nowrap; }
  .lang-switch { order: -1; }
  .nav-menu .lang-switch-mobile { display: flex; margin: 8px 0 4px; width: fit-content; }
  .hero { min-height: auto; display: flex; flex-direction: column; }
  .hero .container {
    min-height: auto;
    padding: calc(72px + 48px) 24px 40px 24px;
    order: 1;
  }
  .hero-content { max-width: none; width: 100%; }
  .hero-media {
    position: relative; width: 100%; height: 52vw;
    max-height: 280px; order: 2;
  }
  .hero-media-overlay {
    background:
      linear-gradient(to bottom, transparent 55%, #0A2540 100%),
      linear-gradient(to top, rgba(10, 37, 64, 0.4) 0%, transparent 35%);
  }
  .hero-sub-nowrap { white-space: normal; max-width: 520px; }
  .hero h1 { font-size: 40px; }
  .page-banner h1 { font-size: 36px; }
  .section-title { font-size: 30px; }
  .narrative-grid, .why-grid, .coop-grid,
  .stats-grid, .partners-row, .footer-grid, .product-grid,
  .mfg-grid, .about-grid, .contact-grid, .values-grid,
  .equipment-grid, .form-row, .ip-stats, .ip-promise {
    grid-template-columns: 1fr;
  }
  .download-row { grid-template-columns: 1fr 1fr; gap: 8px; }
  .download-table--single .download-row {
    grid-template-columns: 1fr;
    padding: 18px 20px;
    min-height: 0 !important;
  }
  .download-table--single .download-row:first-child { display: none; }
  .download-table--single .download-spec,
  .download-table--single .download-detail,
  .download-table--single .download-note { white-space: normal; }
  .download-table--single .download-spec { margin-bottom: 6px; }
  .download-table--single .download-detail { margin-bottom: 12px; }
  .download-table--single .download-action { align-items: flex-start; text-align: left; }
  section { padding: 70px 0; }
  .page-banner { padding: 140px 0 70px; }
  .product-highlights { grid-template-columns: 1fr; }
  .product-highlight-card + .product-highlight-card {
    box-shadow: inset 0 1px 0 rgba(10,37,64,0.08);
  }
  .page-banner--products { padding: 140px 0 56px; }
  .page-banner--products .page-banner-inner {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  .page-banner-visual {
    justify-content: center;
    margin: 0 auto;
    max-width: 420px;
  }
  .page-banner-visual img {
    max-width: 100%;
    -webkit-mask-image: linear-gradient(90deg, transparent 0%, #000 12%, #000 88%, transparent 100%);
    mask-image: linear-gradient(90deg, transparent 0%, #000 12%, #000 88%, transparent 100%);
  }
  .download-tabs {
    overflow-x: auto; flex-wrap: nowrap; -webkit-overflow-scrolling: touch;
    scrollbar-width: none; padding-bottom: 4px;
  }
  .download-tabs::-webkit-scrollbar { display: none; }
  .download-tab { flex-shrink: 0; }
  .download-table-scroll { overflow-x: auto; -webkit-overflow-scrolling: touch; }
  .download-table--sku .download-row { min-width: 640px; }
  .product-spec-table { font-size: 12px; }
  .product-spec-table th, .product-spec-table td { padding: 8px 10px; }
  .coop-meta { flex-direction: column; gap: 8px; align-items: flex-start; }
  .coop-card p { font-size: 14px; }
  .partner-logo { font-size: 13px; padding: 16px 12px; }
  .cta-buttons { flex-direction: column; width: 100%; max-width: 320px; margin: 0 auto; }
  .cta-buttons a { width: 100%; text-align: center; }
  .container { padding: 0 20px; }
  .nav-menu { padding: 16px 20px 24px; }
  .footer-bottom { flex-direction: column; gap: 8px; text-align: center; }
}

@media (max-width: 480px) {
  .logo { font-size: 18px; }
  .logo span { font-size: 11px; margin-left: 4px; }
  .nav-menu { gap: 0; top: 64px; }
  nav .container { height: 64px; }
  .hero h1 { font-size: 32px; }
  .page-banner h1 { font-size: 30px; }
  .section-title { font-size: 26px; }
  .stat-num { font-size: 36px; }
  .lang-btn { padding: 5px 8px; font-size: 11px; }
  .nav-right .btn-primary { padding: 7px 10px; font-size: 12px; }
  .hero .container { padding: calc(64px + 36px) 20px 32px; }
  .page-banner { padding: 120px 0 56px; }
  .mfg-text h2 { font-size: 26px; }
  .values-intro { font-size: 15px; }
  .timeline-year { font-size: 14px; }
}