/* ==========================================================================
   RUIHAI Industrial - Global Stylesheet
   Author: Mavis · For tianjinruihai.com
   ========================================================================== */

:root {
  --color-primary: #0a3d62;
  --color-primary-dark: #062847;
  --color-primary-light: #1e5b94;
  --color-accent: #e67e22;
  --color-accent-dark: #d35400;
  --color-text: #2c3e50;
  --color-text-light: #5d6d7e;
  --color-bg: #ffffff;
  --color-bg-alt: #f7f9fb;
  --color-border: #e1e5ea8;
  --color-success: #27ae60;
  --shadow-sm: 0 2px 8px rgba(10, 61, 98, 0.08);
  --shadow-md: 0 4px 16px rgba(10, 61, 98, 0.12);
  --shadow-lg: 0 10px 40px rgba(10, 61, 98, 0.15);
  --radius: 8px;
  --radius-sm: 4px;
  --transition: 0.25s ease;
  --max-width: 1200px;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    "Helvetica Neue", Arial, "PingFang SC", "Microsoft YaHei", sans-serif;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--transition);
}

a:hover {
  color: var(--color-accent);
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

/* ---------- Header / Nav ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.97);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 1.15rem;
  color: var(--color-primary);
}

.brand-logo-mark {
  width: 36px;
  height: 36px;
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
  color: #fff;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  letter-spacing: 0.5px;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 8px;
  list-style: none;
}

.nav-menu a {
  padding: 8px 16px;
  color: var(--color-text);
  font-weight: 500;
  border-radius: var(--radius-sm);
  transition: all var(--transition);
}

.nav-menu a:hover,
.nav-menu a.active {
  background: var(--color-bg-alt);
  color: var(--color-primary);
}

.lang-switcher {
  display: flex;
  align-items: center;
  gap: 4px;
  margin-left: 12px;
  padding: 4px;
  background: var(--color-bg-alt);
  border-radius: var(--radius);
}

.lang-switcher a {
  padding: 4px 10px;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-text-light);
  border-radius: var(--radius-sm);
  text-transform: uppercase;
}

.lang-switcher a.active,
.lang-switcher a:hover {
  background: var(--color-primary);
  color: #fff;
}

.header-cta {
  margin-left: 12px;
  padding: 8px 18px !important;
  background: var(--color-accent) !important;
  color: #fff !important;
  border-radius: var(--radius-sm);
}

.header-cta:hover {
  background: var(--color-accent-dark) !important;
  color: #fff !important;
}

.mobile-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}

.mobile-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-primary);
  margin: 5px 0;
  transition: var(--transition);
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-block;
  padding: 12px 28px;
  border-radius: var(--radius);
  font-weight: 600;
  text-align: center;
  cursor: pointer;
  border: 2px solid transparent;
  transition: all var(--transition);
  font-size: 1rem;
}

.btn-primary {
  background: var(--color-accent);
  color: #fff;
  border-color: var(--color-accent);
}

.btn-primary:hover {
  background: var(--color-accent-dark);
  border-color: var(--color-accent-dark);
  color: #fff;
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.btn-outline {
  background: transparent;
  color: var(--color-primary);
  border-color: var(--color-primary);
}

.btn-outline:hover {
  background: var(--color-primary);
  color: #fff;
}

.btn-large {
  padding: 16px 36px;
  font-size: 1.05rem;
}

/* ---------- Hero ---------- */
.hero {
  background: linear-gradient(135deg, #0a3d62 0%, #1e5b94 60%, #2874a6 100%);
  color: #fff;
  padding: 100px 0 80px;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: radial-gradient(
      circle at 20% 30%,
      rgba(255, 255, 255, 0.08) 0%,
      transparent 50%
    ),
    radial-gradient(
      circle at 80% 70%,
      rgba(230, 126, 34, 0.12) 0%,
      transparent 50%
    );
}

.hero .container {
  position: relative;
  z-index: 1;
  text-align: center;
}

.hero h1 {
  font-size: clamp(2rem, 5vw, 3.4rem);
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 20px;
  letter-spacing: -0.5px;
}

.hero p {
  font-size: clamp(1rem, 2vw, 1.25rem);
  opacity: 0.95;
  max-width: 720px;
  margin: 0 auto 36px;
}

.hero-actions {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

.hero .btn-outline {
  color: #fff;
  border-color: rgba(255, 255, 255, 0.6);
}

.hero .btn-outline:hover {
  background: #fff;
  color: var(--color-primary);
}

/* ---------- Sections ---------- */
.section {
  padding: 80px 0;
}

.section-alt {
  background: var(--color-bg-alt);
}

.section-header {
  text-align: center;
  margin-bottom: 48px;
}

.section-header h2 {
  font-size: clamp(1.6rem, 3.5vw, 2.4rem);
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 12px;
}

.section-header p {
  font-size: 1.05rem;
  color: var(--color-text-light);
  max-width: 720px;
  margin: 0 auto;
}

/* ---------- Cards ---------- */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 24px;
}

.card {
  background: #fff;
  border-radius: var(--radius);
  border: 1px solid var(--color-border);
  overflow: hidden;
  transition: all var(--transition);
  display: flex;
  flex-direction: column;
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--color-primary-light);
}

.card-image {
  width: 100%;
  aspect-ratio: 4 / 3;
  background: linear-gradient(135deg, #e1e5e8, #c5cdd3);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #7f8c8d;
  font-weight: 600;
  font-size: 1rem;
  position: relative;
  overflow: hidden;
}

.card-image .placeholder-icon {
  font-size: 2.5rem;
  opacity: 0.5;
}

.card-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 38%;
  /* PDF pages have company header at top (~12%) and footer at bottom (~14%);
     biasing to 38% centers the actual product illustration. */
}

.card-body {
  padding: 24px;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.card-tag {
  display: inline-block;
  padding: 4px 10px;
  background: var(--color-bg-alt);
  color: var(--color-primary);
  font-size: 0.75rem;
  font-weight: 600;
  border-radius: 999px;
  margin-bottom: 10px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  align-self: flex-start;
}

.card h3 {
  font-size: 1.25rem;
  margin-bottom: 8px;
  color: var(--color-primary);
}

.card .tagline {
  font-size: 0.9rem;
  color: var(--color-accent);
  font-weight: 600;
  margin-bottom: 12px;
}

.card p {
  color: var(--color-text-light);
  font-size: 0.95rem;
  flex: 1;
  margin-bottom: 16px;
}

.card .btn {
  align-self: flex-start;
}

/* ---------- Advantage Grid ---------- */
.advantage-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 24px;
}

.advantage {
  text-align: center;
  padding: 32px 24px;
}

.advantage-icon {
  width: 64px;
  height: 64px;
  margin: 0 auto 16px;
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
  color: #fff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.6rem;
}

.advantage h3 {
  font-size: 1.15rem;
  margin-bottom: 10px;
  color: var(--color-primary);
}

.advantage p {
  color: var(--color-text-light);
  font-size: 0.95rem;
}

/* ---------- CTA Banner ---------- */
.cta-banner {
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
  color: #fff;
  padding: 60px 0;
  text-align: center;
}

.cta-banner h2 {
  font-size: clamp(1.5rem, 3vw, 2rem);
  margin-bottom: 12px;
}

.cta-banner p {
  opacity: 0.95;
  max-width: 720px;
  margin: 0 auto 24px;
  font-size: 1.05rem;
}

/* ---------- Page Header ---------- */
.page-header {
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
  color: #fff;
  padding: 60px 0 40px;
  text-align: center;
}

.page-header h1 {
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  margin-bottom: 8px;
}

.page-header p {
  opacity: 0.9;
  font-size: 1.05rem;
}

/* ---------- About ---------- */
.about-content {
  max-width: 880px;
  margin: 0 auto;
}

.about-block {
  margin-bottom: 48px;
}

.about-block h2 {
  font-size: 1.6rem;
  color: var(--color-primary);
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 3px solid var(--color-accent);
  display: inline-block;
}

.about-block p {
  color: var(--color-text);
  font-size: 1.05rem;
  margin-bottom: 12px;
  line-height: 1.8;
}

.values-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
  margin-top: 24px;
}

.value-item {
  padding: 20px;
  background: var(--color-bg-alt);
  border-left: 4px solid var(--color-accent);
  border-radius: var(--radius-sm);
  font-weight: 600;
  color: var(--color-primary);
}

/* ---------- Contact ---------- */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.4fr;
  gap: 40px;
}

.contact-info {
  background: var(--color-primary);
  color: #fff;
  padding: 36px;
  border-radius: var(--radius);
  height: fit-content;
}

.contact-info h2 {
  margin-bottom: 24px;
  font-size: 1.4rem;
}

.info-item {
  margin-bottom: 24px;
}

.info-item-label {
  font-size: 0.85rem;
  opacity: 0.7;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 6px;
}

.info-item-value {
  font-size: 1.05rem;
  word-break: break-word;
}

.info-item-value a {
  color: #fff;
  text-decoration: underline;
}

.contact-form {
  background: #fff;
  padding: 36px;
  border-radius: var(--radius);
  border: 1px solid var(--color-border);
}

.contact-form h2 {
  color: var(--color-primary);
  margin-bottom: 8px;
  font-size: 1.4rem;
}

.contact-form > p {
  color: var(--color-text-light);
  margin-bottom: 24px;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-bottom: 16px;
}

.form-group {
  display: flex;
  flex-direction: column;
}

.form-group label {
  font-size: 0.9rem;
  font-weight: 600;
  margin-bottom: 6px;
  color: var(--color-text);
}

.form-group label .req {
  color: var(--color-accent);
}

.form-group input,
.form-group select,
.form-group textarea {
  padding: 12px 14px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-family: inherit;
  font-size: 1rem;
  transition: border-color var(--transition);
  background: #fff;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(10, 61, 98, 0.1);
}

.form-group textarea {
  min-height: 140px;
  resize: vertical;
}

.form-note {
  margin-top: 12px;
  font-size: 0.85rem;
  color: var(--color-text-light);
}

/* ---------- Product Detail ---------- */
.product-detail {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: start;
}

.product-image {
  width: 100%;
  aspect-ratio: 1 / 1;
  background: linear-gradient(135deg, #e1e5e8, #c5cdd3);
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 3rem;
  color: #7f8c8d;
}

.product-info h1 {
  font-size: 2rem;
  color: var(--color-primary);
  margin-bottom: 8px;
}

.product-info .tagline {
  color: var(--color-accent);
  font-weight: 600;
  margin-bottom: 16px;
  font-size: 1.05rem;
}

.product-section {
  margin-top: 28px;
}

.product-section h3 {
  color: var(--color-primary);
  font-size: 1.15rem;
  margin-bottom: 12px;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--color-bg-alt);
}

.spec-table {
  width: 100%;
  border-collapse: collapse;
}

.spec-table tr {
  border-bottom: 1px solid var(--color-border);
}

.spec-table td {
  padding: 10px 0;
  font-size: 0.95rem;
}

.spec-table td:first-child {
  font-weight: 600;
  color: var(--color-text);
  width: 40%;
}

.spec-table td:last-child {
  color: var(--color-text-light);
}

.feature-list {
  list-style: none;
}

.feature-list li {
  padding: 8px 0 8px 28px;
  position: relative;
  color: var(--color-text);
}

.feature-list li::before {
  content: "✓";
  position: absolute;
  left: 0;
  top: 8px;
  width: 20px;
  height: 20px;
  background: var(--color-accent);
  color: #fff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  font-weight: 700;
}

.cert-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 16px;
}

.cert-badge {
  padding: 8px 16px;
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 0.85rem;
  color: var(--color-primary);
}

/* ---------- Footer ---------- */
.site-footer {
  background: #0a2536;
  color: rgba(255, 255, 255, 0.85);
  padding: 48px 0 24px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 36px;
  margin-bottom: 32px;
}

.footer-grid h4 {
  color: #fff;
  margin-bottom: 16px;
  font-size: 1.05rem;
}

.footer-grid ul {
  list-style: none;
}

.footer-grid li {
  padding: 4px 0;
}

.footer-grid a {
  color: rgba(255, 255, 255, 0.7);
  font-size: 0.95rem;
}

.footer-grid a:hover {
  color: var(--color-accent);
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: 20px;
  text-align: center;
  font-size: 0.9rem;
  color: rgba(255, 255, 255, 0.5);
}

/* ---------- Floating WhatsApp ---------- */
.fab-whatsapp {
  position: fixed;
  bottom: 24px;
  right: 24px;
  width: 56px;
  height: 56px;
  background: #25d366;
  color: #fff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.6rem;
  box-shadow: 0 6px 20px rgba(37, 211, 102, 0.4);
  z-index: 99;
  transition: transform var(--transition);
}

.fab-whatsapp:hover {
  transform: scale(1.08);
  color: #fff;
}

/* ---------- Responsive ---------- */
@media (max-width: 900px) {
  .nav-menu {
    display: none;
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    background: #fff;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 16px 0;
    border-bottom: 1px solid var(--color-border);
    box-shadow: var(--shadow-md);
  }

  .nav-menu.open {
    display: flex;
  }

  .nav-menu li {
    width: 100%;
  }

  .nav-menu a {
    display: block;
    padding: 12px 24px;
  }

  .lang-switcher {
    margin: 8px 24px 0;
  }

  .header-cta {
    margin: 8px 24px 0;
  }

  .mobile-toggle {
    display: block;
  }

  .contact-grid {
    grid-template-columns: 1fr;
  }

  .product-detail {
    grid-template-columns: 1fr;
  }

  .form-row {
    grid-template-columns: 1fr;
  }

  .footer-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 600px) {
  .section,
  .hero,
  .page-header {
    padding: 60px 0 40px;
  }

  .hero-actions {
    flex-direction: column;
    align-items: stretch;
  }

  .hero .btn,
  .cta-banner .btn {
    width: 100%;
  }
}

/* ---------- Product Detail (series + model table) ---------- */
.product-detail-wrap {
  max-width: 980px;
  margin: 0 auto;
}

.product-intro {
  margin-bottom: 32px;
}

.product-intro .lead {
  font-size: 1.05rem;
  line-height: 1.8;
  color: var(--color-text);
}

.product-meta {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 16px;
  margin-bottom: 36px;
  padding: 20px;
  background: var(--color-bg-alt);
  border-radius: var(--radius);
}

.meta-item {
  text-align: center;
  padding: 12px;
  border-right: 1px solid var(--color-border);
}

.meta-item:last-child {
  border-right: none;
}

.meta-num {
  font-size: 1.8rem;
  font-weight: 800;
  color: var(--color-primary);
  line-height: 1;
}

.meta-label {
  font-size: 0.85rem;
  color: var(--color-text-light);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-top: 4px;
}

.series-section {
  margin-bottom: 36px;
}

.series-block {
  margin-bottom: 32px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  overflow: hidden;
  background: #fff;
}

.series-header {
  padding: 20px 24px;
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
  color: #fff;
}

.series-header h3 {
  font-size: 1.2rem;
  margin-bottom: 6px;
  font-weight: 700;
}

.series-header p {
  font-size: 0.92rem;
  opacity: 0.9;
  line-height: 1.5;
}

.model-list {
  padding: 8px 0;
}

.model-item {
  border-bottom: 1px solid var(--color-border);
}

.model-item:last-child {
  border-bottom: none;
}

.model-item > summary {
  list-style: none;
  cursor: pointer;
  padding: 14px 24px;
  display: flex;
  align-items: center;
  gap: 16px;
  transition: background var(--transition);
}

.model-item > summary::-webkit-details-marker {
  display: none;
}

.model-item > summary:hover {
  background: var(--color-bg-alt);
}

.model-code {
  flex-shrink: 0;
  font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  font-size: 0.85rem;
  font-weight: 700;
  color: #fff;
  background: var(--color-accent);
  padding: 4px 10px;
  border-radius: var(--radius-sm);
  min-width: 100px;
  text-align: center;
}

.model-name {
  flex: 1;
  font-weight: 500;
  color: var(--color-text);
  font-size: 0.95rem;
}

.model-toggle {
  font-size: 1rem;
  color: var(--color-primary);
  transition: transform var(--transition);
}

.model-item[open] .model-toggle {
  transform: rotate(180deg);
}

.model-body {
  padding: 0 24px 20px 24px;
}

.model-image {
  display: block;
  width: 100%;
  max-width: 520px;
  height: auto;
  margin: 16px auto 8px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border);
  background: #fff;
}

.model-body .spec-table {
  margin-top: 8px;
  background: var(--color-bg-alt);
  border-radius: var(--radius-sm);
  padding: 0 16px;
}

.model-body .spec-table tr:last-child {
  border-bottom: none;
}

.product-cta {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: 36px;
  padding-top: 28px;
  border-top: 1px solid var(--color-border);
  justify-content: center;
}

@media (max-width: 600px) {
  .model-item > summary {
    flex-wrap: wrap;
    gap: 8px;
  }
  .model-code {
    min-width: auto;
    font-size: 0.75rem;
  }
  .model-name {
    font-size: 0.88rem;
    width: 100%;
  }
  .meta-item {
    border-right: none;
    border-bottom: 1px solid var(--color-border);
  }
  .meta-item:last-child {
    border-bottom: none;
  }
}
/* ==========================================================================
   v2 新增组件 —— 信任模块 / 流程 / 术语 / 市场 / FAQ / 博客
   ========================================================================== */

/* --- Hero badges --- */
.hero-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 20px;
  justify-content: center;
}
.hero-badge {
  background: rgba(255, 255, 255, 0.15);
  border: 1px solid rgba(255, 255, 255, 0.28);
  color: #fff;
  padding: 6px 14px;
  border-radius: 999px;
  font-size: 0.88rem;
  font-weight: 500;
  backdrop-filter: blur(4px);
}

/* --- Trust Q&A（首页信任模块） --- */
.trust-list {
  max-width: 860px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.trust-item {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
}
.trust-item > summary {
  cursor: pointer;
  padding: 18px 22px;
  font-weight: 700;
  font-size: 1.06rem;
  color: var(--color-primary);
  list-style: none;
  display: flex;
  align-items: center;
  gap: 12px;
  transition: background var(--transition);
}
.trust-item > summary:hover {
  background: var(--color-bg-alt);
}
.trust-item > summary::-webkit-details-marker { display: none; }
.trust-item > summary::before {
  content: "?";
  flex-shrink: 0;
  width: 26px;
  height: 26px;
  border-radius: 50%;
  background: var(--color-accent);
  color: #fff;
  font-weight: 800;
  font-size: 0.9rem;
  display: flex;
  align-items: center;
  justify-content: center;
}
.trust-body {
  padding: 0 22px 20px 60px;
  color: var(--color-text-light);
  line-height: 1.75;
}

/* --- Process steps --- */
.process-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  counter-reset: step;
}
.process-step {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 26px 22px;
  position: relative;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition), box-shadow var(--transition);
}
.process-step:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}
.process-num {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
  color: #fff;
  font-weight: 800;
  font-size: 1.1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 14px;
}
.process-step h3 {
  font-size: 1.05rem;
  margin-bottom: 8px;
  color: var(--color-primary);
}
.process-step p {
  color: var(--color-text-light);
  font-size: 0.95rem;
  line-height: 1.7;
}

/* --- Terms grid (Incoterms / Payment / QC) --- */
.terms-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.terms-card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-top: 4px solid var(--color-accent);
  border-radius: var(--radius);
  padding: 26px 22px;
  box-shadow: var(--shadow-sm);
}
.terms-card h2 {
  font-size: 1.2rem;
  color: var(--color-primary);
  margin-bottom: 8px;
}
.terms-sub {
  color: var(--color-text-light);
  font-size: 0.92rem;
  margin-bottom: 16px;
  line-height: 1.6;
}
.term-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 14px;
}
.term-badge {
  background: var(--color-bg-alt);
  border: 1px solid var(--color-primary-light);
  color: var(--color-primary);
  padding: 4px 12px;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.4px;
}
.terms-list {
  list-style: none;
  margin-bottom: 14px;
}
.terms-list li {
  padding: 7px 0 7px 22px;
  position: relative;
  color: var(--color-text);
  font-size: 0.93rem;
  line-height: 1.6;
  border-bottom: 1px dashed var(--color-border);
}
.terms-list li:last-child { border-bottom: none; }
.terms-list li::before {
  content: "\2713";
  position: absolute;
  left: 0;
  color: var(--color-success);
  font-weight: 700;
}
.terms-note {
  font-size: 0.88rem;
  color: var(--color-text-light);
  line-height: 1.65;
  padding-top: 10px;
  border-top: 1px solid var(--color-border);
}

/* --- Markets --- */
.market-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.market-card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-left: 4px solid var(--color-primary-light);
  border-radius: var(--radius);
  padding: 20px;
  box-shadow: var(--shadow-sm);
}
.market-card h3 {
  font-size: 1.05rem;
  color: var(--color-primary);
  margin-bottom: 8px;
}
.market-card p {
  font-size: 0.9rem;
  color: var(--color-text-light);
  line-height: 1.6;
}

/* --- FAQ --- */
.faq-list {
  max-width: 860px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.faq-item {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}
.faq-item > summary {
  cursor: pointer;
  padding: 16px 20px;
  font-weight: 600;
  color: var(--color-primary);
  list-style: none;
  display: flex;
  align-items: center;
  gap: 10px;
  transition: background var(--transition);
}
.faq-item > summary:hover { background: var(--color-bg-alt); }
.faq-item > summary::-webkit-details-marker { display: none; }
.faq-item > summary::after {
  content: "+";
  margin-left: auto;
  font-size: 1.3rem;
  font-weight: 400;
  color: var(--color-accent);
  flex-shrink: 0;
}
.faq-item[open] > summary::after { content: "\2212"; }
.faq-body {
  padding: 0 20px 18px;
  color: var(--color-text-light);
  line-height: 1.75;
}

/* --- Breadcrumb --- */
.breadcrumb {
  background: var(--color-bg-alt);
  border-bottom: 1px solid var(--color-border);
  padding: 12px 0;
  font-size: 0.88rem;
}
.breadcrumb ol {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
}
.breadcrumb li {
  color: var(--color-text-light);
}
.breadcrumb li + li::before {
  content: "/";
  margin-right: 8px;
  color: var(--color-border);
}
.breadcrumb .current {
  color: var(--color-primary);
  font-weight: 600;
}

/* --- Note box (产品页采购说明) --- */
.note-box {
  background: linear-gradient(135deg, #eef4fa, #f7f9fb);
  border-left: 4px solid var(--color-primary-light);
  border-radius: var(--radius-sm);
  padding: 16px 20px;
  margin: 22px 0;
  color: var(--color-text);
  line-height: 1.7;
  font-size: 0.95rem;
}
.cert-note {
  margin-top: 12px;
  font-size: 0.88rem;
  color: var(--color-text-light);
  line-height: 1.65;
}
.cta-note {
  text-align: center;
  color: var(--color-text-light);
  font-size: 0.92rem;
  margin-top: 16px;
}

/* --- Form enhancements --- */
.form-group .opt {
  color: var(--color-text-light);
  font-weight: 400;
  font-size: 0.85rem;
}
.hp-field {
  position: absolute !important;
  left: -9999px !important;
  opacity: 0;
  height: 0;
  width: 0;
}
.form-status {
  display: none;
  margin-top: 14px;
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  font-size: 0.93rem;
  line-height: 1.6;
}
.form-status.success {
  background: #e8f8ef;
  border: 1px solid var(--color-success);
  color: #1d7a45;
}
.form-status.error {
  background: #fdecea;
  border: 1px solid #e74c3c;
  color: #a93226;
}

/* --- About page blocks --- */
.highlight-block {
  background: linear-gradient(135deg, #eef4fa, #ffffff);
  border-left: 5px solid var(--color-accent);
  border-radius: var(--radius);
  padding: 28px 26px;
  margin-bottom: 8px;
}
.why-block {
  background: #fdf6ef;
  border-left: 5px solid var(--color-accent-dark);
  border-radius: var(--radius);
  padding: 28px 26px;
}
.verify-block {
  background: #eef9f2;
  border-left: 5px solid var(--color-success);
  border-radius: var(--radius);
  padding: 28px 26px;
}
.verify-cta {
  margin-top: 24px;
  text-align: center;
}

/* --- Blog --- */
.blog-meta {
  display: flex;
  gap: 8px;
  align-items: center;
  font-size: 0.85rem;
  color: var(--color-text-light);
  margin: 8px 0 14px;
}
.card-body h3 a { color: inherit; }

.article-wrap {
  max-width: 820px;
}
.article-header {
  border-bottom: 2px solid var(--color-border);
  padding-bottom: 20px;
  margin-bottom: 28px;
}
.article-header h1 {
  font-size: 2.1rem;
  line-height: 1.3;
  color: var(--color-primary);
  margin: 10px 0 0;
}
.article-content {
  font-size: 1.04rem;
  line-height: 1.85;
  color: var(--color-text);
}
.article-content h2 {
  font-size: 1.5rem;
  color: var(--color-primary);
  margin: 34px 0 14px;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--color-bg-alt);
}
.article-content h3 {
  font-size: 1.2rem;
  color: var(--color-primary);
  margin: 26px 0 10px;
}
.article-content p { margin-bottom: 16px; }
.article-content ul,
.article-content ol {
  margin: 0 0 18px 26px;
  line-height: 1.8;
}
.article-content li { margin-bottom: 8px; }
.article-content strong { color: var(--color-primary); }
.article-content blockquote {
  border-left: 4px solid var(--color-accent);
  background: var(--color-bg-alt);
  padding: 16px 22px;
  margin: 22px 0;
  font-style: italic;
  color: var(--color-text-light);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}
.table-wrap {
  overflow-x: auto;
  margin: 22px 0;
  -webkit-overflow-scrolling: touch;
}
.content-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.94rem;
  min-width: 520px;
}
.content-table th {
  background: var(--color-primary);
  color: #fff;
  padding: 12px 14px;
  text-align: left;
  font-weight: 600;
}
.content-table th:first-child { border-radius: var(--radius-sm) 0 0 0; }
.content-table th:last-child { border-radius: 0 var(--radius-sm) 0 0; }
.content-table td {
  padding: 11px 14px;
  border-bottom: 1px solid var(--color-border);
  vertical-align: top;
}
.content-table tbody tr:nth-child(even) { background: var(--color-bg-alt); }
.callout {
  background: #fff8e6;
  border-left: 4px solid var(--color-accent);
  border-radius: var(--radius-sm);
  padding: 16px 20px;
  margin: 22px 0;
}
.callout strong {
  display: block;
  color: var(--color-accent-dark);
  margin-bottom: 6px;
}
.post-faq {
  margin-top: 40px;
  padding-top: 28px;
  border-top: 2px solid var(--color-border);
}
.post-faq h2 {
  font-size: 1.4rem;
  color: var(--color-primary);
  margin-bottom: 16px;
}
.article-cta {
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
  color: #fff;
  border-radius: var(--radius);
  padding: 28px;
  margin-top: 36px;
  text-align: center;
}
.article-cta p {
  opacity: 0.9;
  margin-bottom: 16px;
  line-height: 1.7;
}
.article-cta .btn-primary {
  background: #fff;
  color: var(--color-primary);
}
.back-link {
  display: inline-block;
  margin-top: 24px;
  color: var(--color-text-light);
  font-weight: 600;
}

/* --- Footer --- */
.footer-disclaimer {
  border-top: 1px solid rgba(255, 255, 255, 0.15);
  margin-top: 26px;
  padding-top: 18px;
  font-size: 0.84rem;
  opacity: 0.7;
  line-height: 1.65;
}

/* ==========================================================================
   Responsive
   ========================================================================== */
@media (max-width: 980px) {
  .process-grid { grid-template-columns: repeat(2, 1fr); }
  .terms-grid { grid-template-columns: 1fr; }
  .market-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 680px) {
  .process-grid { grid-template-columns: 1fr; }
  .market-grid { grid-template-columns: 1fr; }
  .trust-body { padding-left: 22px; }
  .hero-badge { font-size: 0.8rem; padding: 5px 11px; }
  .article-header h1 { font-size: 1.6rem; }
  .article-content { font-size: 1rem; }
  .article-content h2 { font-size: 1.3rem; }
}

/* ==========================================================================
   v2.1 · Stats bar —— 首页 4 列数据条（高端 B2B 站常见模块）
   ========================================================================== */
.stats-bar {
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
  color: #fff;
  padding: 36px 0;
  margin-top: -1px;
}
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  text-align: center;
}
.stat-item {
  padding: 6px 12px;
}
.stat-num {
  font-size: 2.6rem;
  font-weight: 800;
  line-height: 1;
  letter-spacing: -0.5px;
  color: #fff;
  margin-bottom: 6px;
}
.stat-label {
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.6px;
  color: rgba(255, 255, 255, 0.78);
  font-weight: 500;
}
@media (max-width: 680px) {
  .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 14px; }
  .stat-num { font-size: 2.1rem; }
  .stat-label { font-size: 0.78rem; }
}