/* ============================================================
   YiguProto Site-Wide Page Stylesheet
   Shared by every generated page (content areas, forms, tables,
   FAQ, CTA, hero, breadcrumb). Kept separate from header/footer.
   Primary color : #ff6601  |  Font : Arial
   ============================================================ */

:root {
  --yigu-primary: #ff6601;
  --yigu-primary-dark: #d95600;
  --yigu-black: #111111;
  --yigu-dark: #1f1f1f;
  --yigu-gray: #5f6368;
  --yigu-light: #f6f7f9;
  --yigu-border: #e6e8eb;
  --yigu-white: #ffffff;
  --yigu-font: Arial, Helvetica, sans-serif;
  --yigu-shadow: 0 4px 20px rgba(17, 17, 17, 0.08);
  --yigu-shadow-lg: 0 14px 40px rgba(17, 17, 17, 0.14);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: var(--yigu-font);
  color: var(--yigu-dark);
  background: var(--yigu-white);
  -webkit-font-smoothing: antialiased;
  line-height: 1.65;
}

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

a { color: var(--yigu-primary); }
a:hover { color: var(--yigu-primary-dark); }

.container {
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ============================================================
   Hero
   ============================================================ */
.page-hero {
  background: linear-gradient(180deg, #fff7f0 0%, #ffffff 100%);
  border-bottom: 1px solid var(--yigu-border);
  padding: 64px 0 48px;
}

.page-hero__eyebrow {
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--yigu-primary);
  margin: 0 0 12px;
}

.page-hero h1 {
  font-size: 38px;
  line-height: 1.2;
  margin: 0 0 16px;
  color: var(--yigu-black);
  max-width: 900px;
}

.page-hero__lead {
  font-size: 18px;
  color: var(--yigu-gray);
  max-width: 820px;
  margin: 0 0 28px;
  line-height: 1.7;
}

.page-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin: 0;
}

/* ============================================================
   Buttons / CTA
   ============================================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 30px;
  font-size: 15px;
  font-weight: 700;
  font-family: var(--yigu-font);
  border-radius: 8px;
  text-decoration: none;
  cursor: pointer;
  border: 2px solid transparent;
  transition: background 0.2s ease, color 0.2s ease, transform 0.15s ease, box-shadow 0.2s ease;
  line-height: 1;
}

.btn:focus-visible {
  outline: 3px solid rgba(255, 102, 1, 0.5);
  outline-offset: 2px;
}

.btn--primary {
  background: var(--yigu-primary);
  color: #ffffff;
}

.btn--primary:hover {
  background: var(--yigu-primary-dark);
  color: #ffffff;
  transform: translateY(-2px);
  box-shadow: var(--yigu-shadow);
}

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

.btn--outline:hover {
  background: var(--yigu-primary);
  color: #ffffff;
  transform: translateY(-2px);
}

.btn--light {
  background: #ffffff;
  color: var(--yigu-primary);
}

.btn--light:hover {
  background: var(--yigu-light);
}

/* ============================================================
   Breadcrumb
   ============================================================ */
.breadcrumb {
  padding: 16px 0;
  border-bottom: 1px solid var(--yigu-border);
  background: var(--yigu-white);
}

.breadcrumb__list {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin: 0;
  padding: 0;
  font-size: 13px;
}

.breadcrumb__item + .breadcrumb__item::before {
  content: "/";
  color: #b6bbc2;
  margin-right: 6px;
}

.breadcrumb__item a {
  color: var(--yigu-gray);
  text-decoration: none;
}

.breadcrumb__item a:hover { color: var(--yigu-primary); }

.breadcrumb__item[aria-current="page"] {
  color: var(--yigu-primary);
  font-weight: 600;
}

/* ============================================================
   Sections
   ============================================================ */
.section {
  padding: 64px 0;
}

.section--light {
  background: var(--yigu-light);
}

.section--border {
  border-top: 1px solid var(--yigu-border);
}

.section__header {
  max-width: 820px;
  margin-bottom: 40px;
}

.section__eyebrow {
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--yigu-primary);
  margin: 0 0 10px;
}

.section h2,
.section h1 {
  font-size: 30px;
  line-height: 1.25;
  color: var(--yigu-black);
  margin: 0 0 14px;
}

.section h3 {
  font-size: 21px;
  line-height: 1.35;
  color: var(--yigu-black);
  margin: 0 0 12px;
}

.section p {
  color: var(--yigu-gray);
  margin: 0 0 16px;
}

/* Two-column content (text + media) */
.split {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 56px;
  align-items: center;
}

.split--reverse .split__media { order: -1; }

.split__media {
  border-radius: 14px;
  overflow: hidden;
  background: var(--yigu-light);
  border: 1px solid var(--yigu-border);
}

.split__media svg {
  display: block;
  width: 100%;
  height: auto;
}

/* ============================================================
   Feature / value cards
   ============================================================ */
.grid {
  display: grid;
  gap: 24px;
}

.grid--3 { grid-template-columns: repeat(3, 1fr); }
.grid--2 { grid-template-columns: repeat(2, 1fr); }
.grid--4 { grid-template-columns: repeat(4, 1fr); }

.card {
  background: var(--yigu-white);
  border: 1px solid var(--yigu-border);
  border-radius: 12px;
  padding: 26px;
  transition: box-shadow 0.25s ease, transform 0.25s ease;
}

.card:hover {
  box-shadow: var(--yigu-shadow-lg);
  transform: translateY(-3px);
}

.card__icon {
  width: 52px;
  height: 52px;
  border-radius: 12px;
  background: #fff2e8;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 18px;
  color: var(--yigu-primary);
}

.card h3 {
  font-size: 18px;
  margin: 0 0 10px;
}

.card p {
  font-size: 14px;
  color: var(--yigu-gray);
  margin: 0 0 14px;
}

.card a.card__link {
  font-size: 14px;
  font-weight: 700;
  text-decoration: none;
}

/* ============================================================
   Spec tables (materials / process parameters)
   ============================================================ */
.table-wrap {
  overflow-x: auto;
  border: 1px solid var(--yigu-border);
  border-radius: 12px;
  background: var(--yigu-white);
}

.spec-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
  min-width: 640px;
}

.spec-table th,
.spec-table td {
  padding: 13px 16px;
  text-align: left;
  border-bottom: 1px solid var(--yigu-border);
}

.spec-table thead th {
  background: #fff2e8;
  color: var(--yigu-dark);
  font-weight: 700;
  font-size: 13px;
  letter-spacing: 0.4px;
  text-transform: uppercase;
}

.spec-table tbody tr:last-child td { border-bottom: none; }

.spec-table tbody tr:hover { background: var(--yigu-light); }

/* ============================================================
   Process steps
   ============================================================ */
.steps {
  display: grid;
  gap: 20px;
  counter-reset: step;
}

.step {
  display: flex;
  gap: 18px;
  background: var(--yigu-white);
  border: 1px solid var(--yigu-border);
  border-radius: 12px;
  padding: 22px 24px;
}

.step__num {
  counter-increment: step;
  width: 44px;
  height: 44px;
  flex-shrink: 0;
  border-radius: 50%;
  background: var(--yigu-primary);
  color: #ffffff;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
}

.step__num::before { content: counter(step); }

.step h3 { margin: 0 0 8px; font-size: 18px; }
.step p { margin: 0; font-size: 14px; color: var(--yigu-gray); }

/* ============================================================
   FAQ accordion
   ============================================================ */
.faq {
  border: 1px solid var(--yigu-border);
  border-radius: 12px;
  overflow: hidden;
}

.faq__item {
  border-bottom: 1px solid var(--yigu-border);
  background: var(--yigu-white);
}

.faq__item:last-child { border-bottom: none; }

.faq__q {
  width: 100%;
  text-align: left;
  background: none;
  border: none;
  padding: 20px 24px;
  font-family: var(--yigu-font);
  font-size: 16px;
  font-weight: 700;
  color: var(--yigu-dark);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
}

.faq__q::after {
  content: "+";
  font-size: 22px;
  color: var(--yigu-primary);
  font-weight: 700;
  transition: transform 0.25s ease;
}

.faq__item.is-open .faq__q::after {
  transform: rotate(45deg);
}

.faq__a {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease;
}

.faq__a-inner {
  padding: 0 24px 22px;
  color: var(--yigu-gray);
  font-size: 15px;
}

/* ============================================================
   CTA banner
   ============================================================ */
.cta-banner {
  background: linear-gradient(120deg, #ff6601 0%, #ff8a3d 100%);
  border-radius: 16px;
  padding: 48px;
  color: #ffffff;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  flex-wrap: wrap;
}

.cta-banner h2 {
  color: #ffffff;
  font-size: 28px;
  margin: 0 0 10px;
}

.cta-banner p {
  color: rgba(255, 255, 255, 0.92);
  margin: 0;
  max-width: 620px;
}

/* ============================================================
   Contact info & forms
   ============================================================ */
.contact-cards {
  display: grid;
  gap: 24px;
}

.contact-card {
  display: flex;
  gap: 18px;
  align-items: flex-start;
  background: var(--yigu-white);
  border: 1px solid var(--yigu-border);
  border-radius: 12px;
  padding: 24px;
}

.contact-card__icon {
  width: 50px;
  height: 50px;
  flex-shrink: 0;
  border-radius: 12px;
  background: #fff2e8;
  color: var(--yigu-primary);
  display: flex;
  align-items: center;
  justify-content: center;
}

.contact-card h3 { margin: 0 0 6px; font-size: 17px; }
.contact-card p { margin: 0; color: var(--yigu-gray); font-size: 15px; }
.contact-card a { font-weight: 600; text-decoration: none; }

.form-card {
  background: var(--yigu-white);
  border: 1px solid var(--yigu-border);
  border-radius: 14px;
  padding: 32px;
  box-shadow: var(--yigu-shadow);
}

.form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
}

.form-field {
  display: flex;
  flex-direction: column;
  gap: 7px;
}

.form-field--full { grid-column: 1 / -1; }

.form-field label {
  font-size: 13px;
  font-weight: 700;
  color: var(--yigu-dark);
}

.form-field input,
.form-field select,
.form-field textarea {
  font-family: var(--yigu-font);
  font-size: 15px;
  padding: 12px 14px;
  border: 1px solid var(--yigu-border);
  border-radius: 8px;
  background: #fcfcfd;
  color: var(--yigu-dark);
  width: 100%;
}

.form-field input:focus,
.form-field select:focus,
.form-field textarea:focus {
  outline: none;
  border-color: var(--yigu-primary);
  box-shadow: 0 0 0 3px rgba(255, 102, 1, 0.15);
}

.form-field textarea { resize: vertical; min-height: 130px; }

.form-note {
  font-size: 13px;
  color: var(--yigu-gray);
  margin: 14px 0 0;
}

/* ============================================================
   Testimonial / stat highlights
   ============================================================ */
.stat-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  text-align: center;
}

.stat {
  background: var(--yigu-white);
  border: 1px solid var(--yigu-border);
  border-radius: 12px;
  padding: 28px 16px;
}

.stat__num {
  font-size: 36px;
  font-weight: 800;
  color: var(--yigu-primary);
  line-height: 1;
  margin-bottom: 8px;
}

.stat__label {
  font-size: 14px;
  color: var(--yigu-gray);
}

.testimonial {
  background: var(--yigu-white);
  border: 1px solid var(--yigu-border);
  border-left: 4px solid var(--yigu-primary);
  border-radius: 10px;
  padding: 26px;
}

.testimonial p { margin: 0 0 14px; font-size: 15px; color: var(--yigu-dark); font-style: italic; }
.testimonial__author { font-size: 14px; font-weight: 700; color: var(--yigu-gray); }

/* ============================================================
   Legal pages
   ============================================================ */
.legal-page h1 {
  font-size: 34px;
  color: var(--yigu-black);
  margin: 0 0 10px;
}

.legal-page .legal-updated {
  color: var(--yigu-gray);
  font-size: 14px;
  margin-bottom: 28px;
}

.legal-page h2 {
  font-size: 22px;
  color: var(--yigu-black);
  margin: 34px 0 12px;
}

.legal-page h3 { font-size: 17px; margin: 22px 0 10px; }
.legal-page p, .legal-page li { color: var(--yigu-gray); font-size: 15px; }
.legal-page ul { padding-left: 22px; }

/* ============================================================
   404 page
   ============================================================ */
.error-page {
  min-height: 62vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 80px 24px;
}

.error-page__code {
  font-size: 120px;
  font-weight: 800;
  color: var(--yigu-primary);
  line-height: 1;
  margin: 0 0 12px;
}

.error-page h1 { font-size: 30px; color: var(--yigu-black); margin: 0 0 14px; }
.error-page p { color: var(--yigu-gray); max-width: 520px; margin: 0 auto 28px; }

/* ============================================================
   Image + caption (图文并茂)
   ============================================================ */
.media-figure {
  margin: 0;
  border-radius: 14px;
  overflow: hidden;
  border: 1px solid var(--yigu-border);
  background: var(--yigu-light);
}

.media-figure figcaption {
  padding: 14px 18px;
  font-size: 13px;
  color: var(--yigu-gray);
  background: var(--yigu-white);
  border-top: 1px solid var(--yigu-border);
}

/* ============================================================
   Responsive
   ============================================================ */
@media (max-width: 1080px) {
  .page-hero { padding: 48px 0 36px; }
  .page-hero h1 { font-size: 30px; }
  .section { padding: 48px 0; }
  .section h2 { font-size: 26px; }
  .split { grid-template-columns: 1fr; gap: 28px; }
  .split--reverse .split__media { order: 0; }
  .grid--3, .grid--4 { grid-template-columns: repeat(2, 1fr); }
  .stat-row { grid-template-columns: repeat(2, 1fr); }
  .cta-banner { padding: 36px; }
}

@media (max-width: 640px) {
  .container { padding: 0 16px; }
  .page-hero h1 { font-size: 25px; }
  .grid--3, .grid--4, .grid--2 { grid-template-columns: 1fr; }
  .stat-row { grid-template-columns: 1fr 1fr; }
  .form-grid { grid-template-columns: 1fr; }
  .cta-banner { padding: 28px 22px; flex-direction: column; align-items: flex-start; }
  .page-hero__actions { flex-direction: column; align-items: stretch; }
  .btn { width: 100%; }
}