:root {
  --brand: #1F6FEB;
  --brand-dark: #1857C0;
  --accent: #FFB020;
  --text: #1C2430;
  --text-muted: #5A6675;
  --bg: #FFFFFF;
  --bg-soft: #F4F7FB;
  --border: #DCE3EC;
  --radius: 8px;
  --radius-sm: 6px;
  --container: 1120px;
  --font-stack: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --shadow-sm: 0 1px 2px rgba(28, 36, 48, 0.06), 0 2px 8px rgba(28, 36, 48, 0.04);
  --shadow-md: 0 2px 6px rgba(28, 36, 48, 0.08), 0 8px 24px rgba(28, 36, 48, 0.06);
}

/* ============================================================
   base
   ============================================================ */

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-stack);
  font-size: 16px;
  line-height: 1.75;
  font-weight: 400;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4 {
  margin: 0;
  font-weight: 600;
  color: var(--text);
  line-height: 1.35;
}

h1 { font-size: 32px; line-height: 1.3; }
h2 { font-size: 22px; line-height: 1.4; }
h3 { font-size: 18px; line-height: 1.5; }
h4 { font-size: 16px; line-height: 1.5; }

p {
  margin: 0 0 1em;
}

p:last-child {
  margin-bottom: 0;
}

a {
  color: var(--brand);
  text-decoration: none;
  transition: color 0.18s ease;
}

a:hover {
  color: var(--brand-dark);
  text-decoration: underline;
}

a:focus-visible,
button:focus-visible,
summary:focus-visible {
  outline: 2px solid var(--brand);
  outline-offset: 2px;
  border-radius: 4px;
}

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

ul, ol {
  margin: 0;
  padding: 0;
  list-style: none;
}

dl, dt, dd {
  margin: 0;
}

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

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  padding: 10px 16px;
  background: var(--brand);
  color: #fff;
  z-index: 100;
  border-radius: 0 0 var(--radius-sm) 0;
}

.skip-link:focus {
  left: 0;
  color: #fff;
  text-decoration: none;
}

/* ============================================================
   layout — shell skeleton
   ============================================================ */

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: var(--bg);
  border-bottom: 1px solid var(--border);
}

.header-inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: 14px 24px;
  display: flex;
  align-items: center;
  gap: 24px;
  min-height: 64px;
}

.brand {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  font-size: 20px;
  font-weight: 600;
  color: var(--text);
  text-decoration: none;
  white-space: nowrap;
}

.brand:hover {
  color: var(--brand);
  text-decoration: none;
}

.brand-note {
  font-size: 12px;
  font-weight: 400;
  color: var(--text-muted);
  letter-spacing: 0;
}

.site-nav {
  flex: 1;
  display: flex;
  justify-content: center;
}

.nav-list {
  display: flex;
  align-items: center;
  gap: 4px;
}

.nav-list > li {
  display: block;
}

.nav-link {
  display: inline-flex;
  align-items: center;
  height: 40px;
  padding: 0 14px;
  font-size: 15px;
  color: var(--text);
  border-radius: var(--radius-sm);
  text-decoration: none;
  position: relative;
  white-space: nowrap;
}

.nav-link:hover {
  color: var(--brand);
  background: var(--bg-soft);
  text-decoration: none;
}

.nav-link.is-current {
  color: var(--brand);
  font-weight: 600;
}

.nav-link.is-current::after {
  content: "";
  position: absolute;
  left: 14px;
  right: 14px;
  bottom: 2px;
  height: 2px;
  background: var(--brand);
  border-radius: 2px;
}

.header-cta {
  display: inline-flex;
  align-items: center;
  height: 40px;
  padding: 0 18px;
  background: var(--brand);
  color: #fff;
  font-size: 14px;
  font-weight: 600;
  border-radius: var(--radius-sm);
  text-decoration: none;
  white-space: nowrap;
  transition: background 0.18s ease;
}

.header-cta:hover {
  background: var(--brand-dark);
  color: #fff;
  text-decoration: none;
}

.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  padding: 0;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
}

.nav-toggle-bar {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: transform 0.2s ease, opacity 0.2s ease;
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(1) {
  transform: translateY(6px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(2) {
  opacity: 0;
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(3) {
  transform: translateY(-6px) rotate(-45deg);
}

.site-main {
  display: block;
  width: 100%;
}

.inner-main {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px 72px;
}

.site-footer {
  background: var(--bg-soft);
  border-top: 1px solid var(--border);
  margin-top: 0;
}

.footer-inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: 48px 24px 32px;
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.2fr;
  gap: 40px 32px;
}

.footer-brand {
  max-width: 320px;
}

.footer-name {
  font-size: 18px;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 8px;
}

.footer-desc {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.7;
  margin: 0;
}

.footer-group {
  display: block;
}

.footer-title {
  font-size: 14px;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 12px;
}

.footer-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.footer-list a {
  font-size: 14px;
  color: var(--text-muted);
  text-decoration: none;
  line-height: 1.6;
}

.footer-list a:hover {
  color: var(--brand);
  text-decoration: none;
}

.footer-bottom {
  max-width: var(--container);
  margin: 0 auto;
  padding: 20px 24px 32px;
  border-top: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}

.footer-copy {
  font-size: 13px;
  color: var(--text-muted);
  margin: 0;
}

.back-to-top {
  font-size: 14px;
  color: var(--brand);
  text-decoration: none;
}

.back-to-top:hover {
  text-decoration: underline;
}

/* ============================================================
   components — shared
   ============================================================ */

.section-head {
  margin-bottom: 28px;
  max-width: 720px;
}

.section-head h2 {
  margin-bottom: 8px;
}

.section-desc {
  font-size: 15px;
  color: var(--text-muted);
  margin: 0;
}

.section-title {
  font-size: 22px;
  margin-bottom: 8px;
}

.section-intro,
.section-lead {
  font-size: 15px;
  color: var(--text-muted);
  margin: 0 0 24px;
  max-width: 720px;
}

.section-more {
  margin-top: 20px;
  font-size: 15px;
}

.more-link,
.text-link {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  color: var(--brand);
  font-weight: 600;
  text-decoration: none;
}

.more-link::after,
.text-link::after {
  content: "→";
  font-weight: 400;
  transition: transform 0.18s ease;
}

.more-link:hover,
.text-link:hover {
  color: var(--brand-dark);
  text-decoration: none;
}

.more-link:hover::after,
.text-link:hover::after {
  transform: translateX(3px);
}

.section-note {
  margin-top: 20px;
  font-size: 14px;
  color: var(--text-muted);
}

.section-note a {
  color: var(--brand);
  margin-right: 12px;
}

.table-wrap {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg);
}

.table-caption {
  caption-side: top;
  text-align: left;
  padding: 14px 18px;
  font-size: 14px;
  color: var(--text-muted);
  border-bottom: 1px solid var(--border);
  background: var(--bg-soft);
}

.delivery-summary,
.deliverable-table {
  min-width: 640px;
  font-size: 15px;
}

.delivery-summary th,
.delivery-summary td,
.deliverable-table th,
.deliverable-table td {
  padding: 14px 18px;
  text-align: left;
  vertical-align: top;
  border-bottom: 1px solid var(--border);
  line-height: 1.7;
}

.delivery-summary thead th,
.deliverable-table thead th {
  background: var(--bg-soft);
  font-weight: 600;
  color: var(--text);
  white-space: nowrap;
}

.delivery-summary tbody th,
.deliverable-table tbody th {
  font-weight: 600;
  color: var(--text);
  background: var(--bg-soft);
  width: 26%;
}

.delivery-summary tbody tr:last-child th,
.delivery-summary tbody tr:last-child td,
.deliverable-table tbody tr:last-child th,
.deliverable-table tbody tr:last-child td {
  border-bottom: none;
}

/* FAQ (details) */

.faq-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.faq-item {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg);
  transition: border-color 0.18s ease, box-shadow 0.18s ease;
}

.faq-item:hover {
  border-color: #C6D4E6;
}

.faq-item[open] {
  border-color: #B7CCE8;
  box-shadow: var(--shadow-sm);
}

.faq-question {
  list-style: none;
  cursor: pointer;
  padding: 16px 48px 16px 18px;
  font-size: 16px;
  font-weight: 600;
  color: var(--text);
  position: relative;
  min-height: 44px;
  display: flex;
  align-items: center;
  line-height: 1.5;
}

.faq-question::-webkit-details-marker {
  display: none;
}

.faq-question::after {
  content: "+";
  position: absolute;
  right: 18px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 20px;
  font-weight: 400;
  color: var(--brand);
  line-height: 1;
}

.faq-item[open] .faq-question::after {
  content: "−";
}

.faq-answer {
  padding: 0 18px 18px;
  font-size: 15px;
  color: var(--text-muted);
  line-height: 1.8;
}

.faq-answer p {
  margin: 0 0 0.6em;
}

.faq-answer p:last-child {
  margin-bottom: 0;
}

/* breadcrumb */

.breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 6px;
  font-size: 14px;
  color: var(--text-muted);
  padding: 20px 0 4px;
}

.breadcrumb a {
  color: var(--text-muted);
  text-decoration: none;
}

.breadcrumb a:hover {
  color: var(--brand);
}

.breadcrumb-sep {
  color: #B4BECC;
}

.breadcrumb-current {
  color: var(--text);
  font-weight: 600;
}

/* page header (inner pages) */

.page-header {
  padding: 16px 0 32px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 40px;
}

.page-title {
  font-size: 32px;
  line-height: 1.3;
  margin-bottom: 12px;
}

.page-intro,
.page-subtitle,
.page-description {
  font-size: 16px;
  color: var(--text-muted);
  max-width: 720px;
  line-height: 1.75;
  margin: 0 0 12px;
}

.page-note {
  font-size: 14px;
  color: var(--text-muted);
  margin: 0;
}

.page-header-media,
.page-figure {
  margin: 24px 0 0;
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--bg-soft);
}

.page-header-media img,
.page-figure img {
  width: 100%;
  height: auto;
  max-height: 380px;
  object-fit: cover;
  display: block;
}

.page-header-media figcaption,
.page-figure figcaption,
.page-figure-caption {
  padding: 12px 16px;
  font-size: 14px;
  color: var(--text-muted);
  background: var(--bg-soft);
  border-top: 1px solid var(--border);
}

/* ============================================================
   pages — index.html
   ============================================================ */

.home-main {
  padding-bottom: 64px;
}

/* hero */
.hero {
  background: var(--bg-soft);
  border-bottom: 1px solid var(--border);
}

.hero-layout {
  max-width: var(--container);
  margin: 0 auto;
  padding: 56px 24px 56px;
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr);
  gap: 48px;
  align-items: start;
}

.hero-copy {
  min-width: 0;
}

.hero-eyebrow {
  display: inline-block;
  font-size: 13px;
  font-weight: 600;
  color: var(--brand);
  background: rgba(31, 111, 235, 0.08);
  padding: 4px 12px;
  border-radius: 999px;
  margin: 0 0 16px;
  letter-spacing: 0;
}

.hero-title {
  font-size: 34px;
  line-height: 1.28;
  margin-bottom: 16px;
}

.hero-lead {
  font-size: 17px;
  color: var(--text-muted);
  line-height: 1.75;
  margin: 0 0 28px;
  max-width: 540px;
}

.hero-entry-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.hero-entry {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 14px 16px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  min-height: 44px;
  transition: border-color 0.18s ease, box-shadow 0.18s ease, transform 0.18s ease;
}

.hero-entry:hover {
  border-color: #B7CCE8;
  box-shadow: var(--shadow-sm);
  transform: translateY(-1px);
}

.entry-link {
  font-size: 15px;
  font-weight: 600;
  color: var(--brand);
  text-decoration: none;
}

.entry-link:hover {
  color: var(--brand-dark);
  text-decoration: none;
}

.entry-desc {
  font-size: 13px;
  color: var(--text-muted);
  line-height: 1.6;
}

.hero-visual {
  min-width: 0;
}

.hero-figure {
  margin: 0 0 20px;
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--bg);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-md);
}

.hero-figure img {
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  display: block;
}

.hero-caption {
  padding: 12px 16px;
  font-size: 13px;
  color: var(--text-muted);
  background: var(--bg);
  border-top: 1px solid var(--border);
}

.hero-points {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.hero-point {
  position: relative;
  padding: 10px 14px 10px 34px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 14px;
  color: var(--text);
  line-height: 1.65;
}

.hero-point::before {
  content: "";
  position: absolute;
  left: 14px;
  top: 18px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent);
}

/* directions */
.directions {
  max-width: var(--container);
  margin: 0 auto;
  padding: 56px 24px;
}

.direction-list {
  display: flex;
  flex-direction: column;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--bg);
}

.direction-row {
  border-bottom: 1px solid var(--border);
}

.direction-row:last-child {
  border-bottom: none;
}

.direction-link {
  display: grid;
  grid-template-columns: 200px minmax(0, 1fr) 32px;
  align-items: center;
  gap: 20px;
  padding: 18px 22px;
  min-height: 44px;
  text-decoration: none;
  color: inherit;
  transition: background 0.18s ease;
}

.direction-link:hover {
  background: var(--bg-soft);
  text-decoration: none;
}

.direction-name {
  font-size: 16px;
  font-weight: 600;
  color: var(--text);
}

.direction-for {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.65;
}

.direction-arrow {
  text-align: right;
  color: var(--brand);
  font-size: 18px;
  line-height: 1;
  transition: transform 0.18s ease;
}

.direction-link:hover .direction-arrow {
  transform: translateX(3px);
}

/* background */
.background {
  background: var(--bg-soft);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.background-layout {
  max-width: var(--container);
  margin: 0 auto;
  padding: 56px 24px;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.1fr);
  gap: 48px;
  align-items: start;
}

.background-copy h2 {
  margin-bottom: 16px;
}

.background-copy p {
  font-size: 15px;
  color: var(--text-muted);
  line-height: 1.8;
}

.background-gallery {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.gallery-item {
  margin: 0;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: box-shadow 0.18s ease, transform 0.18s ease;
}

.gallery-item:hover {
  box-shadow: var(--shadow-sm);
  transform: translateY(-2px);
}

.gallery-item img {
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  display: block;
}

.gallery-item figcaption {
  padding: 10px 12px;
  font-size: 13px;
  color: var(--text-muted);
  line-height: 1.6;
  border-top: 1px solid var(--border);
}

/* delivery table */
.delivery-table {
  max-width: var(--container);
  margin: 0 auto;
  padding: 56px 24px;
}

/* process */
.process {
  background: var(--bg-soft);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.process .section-head,
.process .process-list,
.process .section-more {
  max-width: var(--container);
  margin-left: auto;
  margin-right: auto;
}

.process .section-head {
  padding: 56px 24px 0;
  margin-bottom: 28px;
  max-width: var(--container);
}

.process-list {
  padding: 0 24px;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 20px;
}

.process-step {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px 20px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  min-height: 100%;
  transition: box-shadow 0.18s ease, transform 0.18s ease;
}

.process-step:hover {
  box-shadow: var(--shadow-sm);
  transform: translateY(-2px);
}

.step-no {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--accent);
  color: #4A3200;
  font-size: 15px;
  font-weight: 600;
}

.process-step .step-name {
  font-size: 17px;
  margin: 0;
}

.process-step .step-desc {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.7;
  margin: 0;
}

.process-step .step-output {
  font-size: 13px;
  color: var(--text);
  background: var(--bg-soft);
  border-radius: var(--radius-sm);
  padding: 8px 10px;
  margin: 0;
  line-height: 1.6;
}

.process .section-more {
  padding: 24px 24px 56px;
}

/* faq summary */
.faq-summary {
  max-width: var(--container);
  margin: 0 auto;
  padding: 56px 24px;
}

/* ============================================================
   pages — inner shared (fuwu / liucheng / jiaofu / wenti)
   ============================================================ */

.page-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 280px;
  gap: 48px;
  align-items: start;
}

.layout-main {
  min-width: 0;
}

/* ---- fuwu.html ---- */

.directions .section-title {
  margin-bottom: 8px;
}

.direction {
  padding: 28px 0;
  border-bottom: 1px solid var(--border);
}

.direction:first-of-type {
  padding-top: 0;
}

.direction:last-of-type {
  border-bottom: none;
}

.direction-head {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 12px;
}

.direction-index {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--accent);
  color: #4A3200;
  font-size: 15px;
  font-weight: 600;
  flex-shrink: 0;
}

.direction-head .direction-name {
  font-size: 20px;
  margin: 0;
}

.direction-meta {
  display: grid;
  grid-template-columns: 88px minmax(0, 1fr);
  gap: 8px 16px;
  padding: 12px 16px;
  background: var(--bg-soft);
  border-radius: var(--radius);
  margin-bottom: 18px;
  font-size: 14px;
}

.direction-meta dt {
  color: var(--text-muted);
  font-weight: 600;
}

.direction-meta dd {
  color: var(--text);
  line-height: 1.7;
}

.direction-cols {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 24px;
}

.direction-col {
  min-width: 0;
}

.col-title {
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--text);
}

.col-list {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.col-list li {
  position: relative;
  padding-left: 16px;
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.7;
}

.col-list li::before {
  content: "";
  position: absolute;
  left: 2px;
  top: 11px;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--brand);
}

.judgement {
  margin-top: 48px;
  padding-top: 40px;
  border-top: 1px solid var(--border);
}

.judgement-list {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
  margin-bottom: 24px;
}

.judgement-item {
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  min-width: 0;
}

.judgement-name {
  font-size: 16px;
  margin: 0 0 8px;
}

.judgement-text {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.7;
  margin: 0 0 10px;
}

.judgement-example {
  font-size: 13px;
  color: var(--text);
  background: var(--bg);
  border-left: 3px solid var(--accent);
  padding: 8px 12px;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  margin: 0;
  line-height: 1.65;
}

.judgement-foot {
  font-size: 14px;
  color: var(--text-muted);
  margin: 0;
}

.anchor-index {
  position: sticky;
  top: 88px;
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
}

.anchor-title {
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 12px;
}

.anchor-list {
  display: flex;
  flex-direction: column;
  gap: 4px;
  margin-bottom: 16px;
}

.anchor-list a {
  display: block;
  padding: 8px 10px;
  font-size: 14px;
  color: var(--text);
  border-radius: var(--radius-sm);
  text-decoration: none;
  min-height: 40px;
  line-height: 24px;
  transition: background 0.18s ease, color 0.18s ease;
}

.anchor-list a:hover {
  background: var(--bg);
  color: var(--brand);
  text-decoration: none;
}

.anchor-note {
  font-size: 13px;
  color: var(--text-muted);
  line-height: 1.7;
  margin: 0 0 10px;
  padding-top: 14px;
  border-top: 1px solid var(--border);
}

.anchor-link {
  font-size: 14px;
  margin: 0;
}

/* ---- liucheng.html ---- */

.stage-section {
  margin-bottom: 56px;
}

.stage-section h2 {
  margin-bottom: 8px;
}

.stage {
  display: grid;
  grid-template-columns: 220px minmax(0, 1fr);
  gap: 32px;
  padding: 28px 0;
  border-bottom: 1px solid var(--border);
}

.stage:last-of-type {
  border-bottom: none;
}

.stage-head {
  display: flex;
  flex-direction: column;
  gap: 6px;
  min-width: 0;
}

.stage-no {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--accent);
  color: #4A3200;
  font-size: 16px;
  font-weight: 600;
  margin: 0;
}

.stage-name {
  font-size: 20px;
  margin: 0;
}

.stage-body {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 24px;
  min-width: 0;
}

.stage-col {
  min-width: 0;
}

.stage-col-title {
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 10px;
  color: var(--text);
}

.stage-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.stage-list li {
  position: relative;
  padding-left: 16px;
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.7;
}

.stage-list li::before {
  content: "";
  position: absolute;
  left: 2px;
  top: 11px;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--brand);
}

.sync-section {
  margin-bottom: 56px;
}

.sync-section h2 {
  margin-bottom: 8px;
}

.sync-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
}

.sync-item {
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  min-width: 0;
}

.sync-title {
  font-size: 16px;
  margin: 0 0 8px;
}

.sync-desc {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.7;
  margin: 0 0 10px;
}

.sync-scene {
  font-size: 13px;
  color: var(--text);
  background: var(--bg);
  border-left: 3px solid var(--accent);
  padding: 8px 12px;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  margin: 0;
  line-height: 1.65;
}

.related-section h2 {
  margin-bottom: 8px;
}

.related-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.related-item {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 16px 18px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: border-color 0.18s ease, box-shadow 0.18s ease;
}

.related-item:hover {
  border-color: #B7CCE8;
  box-shadow: var(--shadow-sm);
}

.related-item a {
  font-size: 15px;
  font-weight: 600;
  color: var(--brand);
  text-decoration: none;
}

.related-item a:hover {
  color: var(--brand-dark);
  text-decoration: none;
}

.related-note {
  font-size: 13px;
  color: var(--text-muted);
  line-height: 1.6;
}

/* ---- jiaofu.html ---- */

.deliverables {
  margin-bottom: 56px;
}

.deliverables h2 {
  margin-bottom: 8px;
}

.acceptance {
  margin-bottom: 56px;
}

.acceptance h2 {
  margin-bottom: 8px;
}

.acceptance-columns {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 32px;
}

.acceptance-col {
  min-width: 0;
}

.acceptance-col h3 {
  font-size: 16px;
  margin-bottom: 12px;
}

.point-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.point-list li {
  padding: 14px 16px;
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 14px;
  line-height: 1.7;
}

.point-list strong {
  display: block;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 4px;
}

.point-list p {
  margin: 0;
  color: var(--text-muted);
}

.method-list {
  display: grid;
  grid-template-columns: 120px minmax(0, 1fr);
  gap: 10px 16px;
  font-size: 14px;
}

.method-list dt {
  font-weight: 600;
  color: var(--text);
  padding-top: 4px;
}

.method-list dd {
  color: var(--text-muted);
  line-height: 1.75;
  padding-bottom: 12px;
  border-bottom: 1px dashed var(--border);
}

.method-list dd:last-of-type {
  border-bottom: none;
  padding-bottom: 0;
}

.revision {
  margin-bottom: 56px;
}

.revision h2 {
  margin-bottom: 12px;
}

.revision > p {
  font-size: 15px;
  color: var(--text-muted);
  line-height: 1.8;
  max-width: 780px;
}

.revision-steps {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin: 20px 0 0;
  counter-reset: rev;
}

.revision-steps li {
  display: grid;
  grid-template-columns: 160px minmax(0, 1fr);
  gap: 20px;
  padding: 16px 18px;
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  align-items: start;
}

.revision-steps .step-name {
  font-size: 15px;
  font-weight: 600;
  color: var(--text);
}

.revision-steps p {
  margin: 0;
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.75;
}

.related-entry h2 {
  margin-bottom: 16px;
}

/* ---- wenti.html ---- */

.faq-group {
  margin-bottom: 48px;
}

.faq-group:last-of-type {
  margin-bottom: 0;
}

.faq-group .section-title {
  margin-bottom: 8px;
}

.next-step {
  margin-top: 56px;
  padding-top: 40px;
  border-top: 1px solid var(--border);
}

.next-step h2 {
  margin-bottom: 20px;
}

.next-step-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px;
  margin-bottom: 20px;
}

.next-step-card {
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px;
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.next-step-title {
  font-size: 17px;
  margin: 0;
}

.next-step-card p {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.75;
  margin: 0;
}

.next-step-card .text-link {
  font-size: 14px;
  align-self: flex-start;
}

.next-step-note {
  font-size: 14px;
  color: var(--text-muted);
  margin: 0;
}

/* ============================================================
   pages — 404.html
   ============================================================ */

.error-main {
  max-width: var(--container);
  margin: 0 auto;
  padding: 64px 24px 96px;
}

.error-panel {
  max-width: 640px;
  margin: 0 auto;
  text-align: center;
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 48px 32px;
}

.error-panel h1 {
  font-size: 32px;
  margin-bottom: 16px;
}

.error-text {
  font-size: 16px;
  color: var(--text-muted);
  line-height: 1.75;
  margin: 0 0 24px;
}

.error-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px;
  margin-bottom: 28px;
}

.error-links a {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 8px 16px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 14px;
  color: var(--text);
  text-decoration: none;
  transition: border-color 0.18s ease, color 0.18s ease;
}

.error-links a:hover {
  border-color: var(--brand);
  color: var(--brand);
  text-decoration: none;
}

.error-home-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 24px;
  background: var(--brand);
  color: #fff;
  font-size: 15px;
  font-weight: 600;
  border-radius: var(--radius-sm);
  text-decoration: none;
}

.error-home-btn:hover {
  background: var(--brand-dark);
  color: #fff;
  text-decoration: none;
}

/* ============================================================
   responsive
   ============================================================ */

@media (max-width: 1000px) {
  .page-layout {
    grid-template-columns: minmax(0, 1fr) 240px;
    gap: 32px;
  }

  .process-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .judgement-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .judgement-item:last-child {
    grid-column: 1 / -1;
  }
}

@media (max-width: 900px) {
  .header-inner {
    flex-wrap: wrap;
    gap: 12px;
    padding: 12px 20px;
  }

  .nav-toggle {
    display: inline-flex;
    margin-left: auto;
    order: 3;
  }

  .header-cta {
    order: 4;
    height: 40px;
    padding: 0 14px;
  }

  .site-nav {
    order: 5;
    flex-basis: 100%;
    justify-content: flex-start;
  }

  .nav-list {
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 2px;
    width: 100%;
    padding: 8px 0 4px;
    border-top: 1px solid var(--border);
  }

  .nav-list.is-open {
    display: flex;
  }

  .nav-link {
    height: auto;
    min-height: 44px;
    padding: 10px 12px;
    width: 100%;
    border-radius: var(--radius-sm);
  }

  .nav-link.is-current::after {
    display: none;
  }

  .nav-link.is-current {
    background: rgba(31, 111, 235, 0.08);
  }

  .hero-layout {
    grid-template-columns: minmax(0, 1fr);
    gap: 32px;
    padding: 40px 20px;
  }

  .hero-title {
    font-size: 28px;
  }

  .background-layout {
    grid-template-columns: minmax(0, 1fr);
    gap: 32px;
    padding: 40px 20px;
  }

  .directions,
  .delivery-table,
  .faq-summary {
    padding: 40px 20px;
  }

  .process .section-head {
    padding: 40px 20px 0;
  }

  .process-list {
    padding: 0 20px;
  }

  .process .section-more {
    padding: 20px 20px 40px;
  }

  .page-layout {
    grid-template-columns: minmax(0, 1fr);
    gap: 32px;
  }

  .anchor-index {
    position: static;
    order: -1;
  }

  .stage {
    grid-template-columns: minmax(0, 1fr);
    gap: 16px;
  }

  .stage-head {
    flex-direction: row;
    align-items: center;
    gap: 12px;
  }

  .sync-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .sync-item:last-child {
    grid-column: 1 / -1;
  }

  .footer-inner {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 32px 24px;
    padding: 40px 20px 24px;
  }

  .footer-brand {
    grid-column: 1 / -1;
    max-width: none;
  }

  .footer-bottom {
    padding: 16px 20px 28px;
  }
}

@media (max-width: 600px) {
  body {
    font-size: 15px;
  }

  h1 { font-size: 26px; }
  h2 { font-size: 20px; }
  h3 { font-size: 17px; }

  .inner-main {
    padding: 0 16px 56px;
  }

  .breadcrumb {
    padding: 14px 0 2px;
    font-size: 13px;
  }

  .page-header {
    padding: 12px 0 24px;
    margin-bottom: 28px;
  }

  .page-title {
    font-size: 26px;
  }

  .hero-layout {
    padding: 32px 16px;
  }

  .hero-title {
    font-size: 25px;
  }

  .hero-lead {
    font-size: 15px;
  }

  .hero-entry-list {
    grid-template-columns: minmax(0, 1fr);
  }

  .directions,
  .delivery-table,
  .faq-summary {
    padding: 32px 16px;
  }

  .process .section-head {
    padding: 32px 16px 0;
  }

  .process-list {
    padding: 0 16px;
    grid-template-columns: minmax(0, 1fr);
  }

  .process .section-more {
    padding: 16px 16px 32px;
  }

  .background-layout {
    padding: 32px 16px;
  }

  .background-gallery {
    grid-template-columns: minmax(0, 1fr);
  }

  .direction-link {
    grid-template-columns: minmax(0, 1fr) 24px;
    grid-template-areas:
      "name arrow"
      "for arrow";
    gap: 4px 12px;
    padding: 16px;
  }

  .direction-name { grid-area: name; }
  .direction-for { grid-area: for; }
  .direction-arrow { grid-area: arrow; align-self: center; }

  .direction-cols {
    grid-template-columns: minmax(0, 1fr);
    gap: 20px;
  }

  .direction-meta {
    grid-template-columns: minmax(0, 1fr);
    gap: 4px;
  }

  .judgement-list {
    grid-template-columns: minmax(0, 1fr);
  }

  .judgement-item:last-child {
    grid-column: auto;
  }

  .stage-body {
    grid-template-columns: minmax(0, 1fr);
    gap: 20px;
  }

  .sync-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .sync-item:last-child {
    grid-column: auto;
  }

  .related-list {
    grid-template-columns: minmax(0, 1fr);
  }

  .acceptance-columns {
    grid-template-columns: minmax(0, 1fr);
    gap: 24px;
  }

  .method-list {
    grid-template-columns: minmax(0, 1fr);
    gap: 4px;
  }

  .method-list dt {
    padding-top: 8px;
  }

  .method-list dd {
    padding-bottom: 12px;
  }

  .revision-steps li {
    grid-template-columns: minmax(0, 1fr);
    gap: 6px;
  }

  .next-step-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .delivery-summary,
  .deliverable-table {
    min-width: 520px;
  }

  .delivery-summary th,
  .delivery-summary td,
  .deliverable-table th,
  .deliverable-table td {
    padding: 12px 14px;
    font-size: 14px;
  }

  .footer-inner {
    grid-template-columns: minmax(0, 1fr);
    gap: 28px;
    padding: 32px 16px 20px;
  }

  .footer-bottom {
    padding: 14px 16px 24px;
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
  }

  .error-main {
    padding: 40px 16px 64px;
  }

  .error-panel {
    padding: 32px 20px;
  }

  .error-panel h1 {
    font-size: 26px;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }
}