:root {
  --color-primary: #1F3A5F;
  --color-primary-soft: #2C4E7A;
  --color-accent-orange: #E4572E;
  --color-accent-green: #2E9E7B;
  --color-accent-yellow: #F2B705;
  --color-bg: #FFFFFF;
  --color-bg-soft: #F5F6F8;
  --color-line: #E1E4EA;
  --color-line-strong: #C9CFD9;
  --color-text: #22272E;
  --color-text-soft: #5B6470;
  --color-text-invert: #FFFFFF;
  --radius-sm: 4px;
  --radius-md: 6px;
  --radius-lg: 8px;
  --shadow-card: 0 1px 2px rgba(31, 58, 95, 0.06), 0 6px 18px rgba(31, 58, 95, 0.05);
  --shadow-raise: 0 2px 4px rgba(31, 58, 95, 0.08), 0 10px 26px rgba(31, 58, 95, 0.08);
  --font-sans: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Source Han Sans SC", "Noto Sans CJK SC", Arial, sans-serif;
  --font-mono: "SFMono-Regular", "JetBrains Mono", Menlo, Consolas, "Courier New", monospace;
  --container: 1180px;
  --container-narrow: 1080px;
  --gap-xs: 8px;
  --gap-sm: 12px;
  --gap-md: 20px;
  --gap-lg: 32px;
  --gap-xl: 56px;
}

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

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

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

body.site-body {
  margin: 0;
  background-color: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.75;
  font-weight: 400;
  text-rendering: optimizeLegibility;
}

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

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

a:hover,
a:focus-visible {
  color: var(--color-accent-orange);
}

a:focus-visible,
button:focus-visible,
summary:focus-visible {
  outline: 2px solid var(--color-accent-orange);
  outline-offset: 2px;
}

h1,
h2,
h3,
h4 {
  margin: 0;
  color: var(--color-primary);
  font-weight: 700;
  line-height: 1.35;
}

p {
  margin: 0;
}

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

dl,
dd,
dt {
  margin: 0;
}

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

button {
  font-family: inherit;
  font-size: inherit;
  border: none;
  background: none;
  cursor: pointer;
}

figure {
  margin: 0;
}

/* ============ layout ============ */

.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  background-color: var(--color-primary);
  color: var(--color-text-invert);
  box-shadow: 0 1px 0 rgba(255, 255, 255, 0.06), 0 6px 20px rgba(15, 27, 46, 0.16);
}

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

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--color-text-invert);
  flex-shrink: 0;
}

.brand:hover,
.brand:focus-visible {
  color: var(--color-text-invert);
}

.brand-mark {
  width: 34px;
  height: 34px;
  border-radius: var(--radius-md);
  background-color: var(--color-accent-orange);
  position: relative;
  flex-shrink: 0;
}

.brand-mark::before,
.brand-mark::after {
  content: "";
  position: absolute;
  background-color: var(--color-text-invert);
  border-radius: 1px;
}

.brand-mark::before {
  left: 9px;
  top: 10px;
  width: 16px;
  height: 3px;
}

.brand-mark::after {
  left: 9px;
  top: 18px;
  width: 10px;
  height: 3px;
}

.brand-name {
  font-size: 19px;
  font-weight: 700;
  line-height: 1.2;
}

.brand-slogan {
  font-size: 12px;
  color: rgba(255, 255, 255, 0.72);
  line-height: 1.2;
  padding-left: 10px;
  border-left: 1px solid rgba(255, 255, 255, 0.28);
}

.site-nav {
  margin-left: auto;
}

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

.nav-link {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0 14px;
  border-radius: var(--radius-md);
  color: rgba(255, 255, 255, 0.86);
  font-size: 15px;
  font-weight: 500;
}

.nav-link:hover,
.nav-link:focus-visible {
  color: var(--color-text-invert);
  background-color: rgba(255, 255, 255, 0.12);
}

.nav-link.is-current {
  color: var(--color-text-invert);
  background-color: rgba(255, 255, 255, 0.16);
  box-shadow: inset 0 -2px 0 var(--color-accent-orange);
}

.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  margin-left: auto;
  border-radius: var(--radius-md);
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  background-color: rgba(255, 255, 255, 0.1);
}

.nav-toggle-bar {
  display: block;
  width: 20px;
  height: 2px;
  border-radius: 1px;
  background-color: var(--color-text-invert);
}

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

.top-line-text {
  max-width: var(--container);
  margin: 0 auto;
  padding: 9px 24px;
  font-size: 13px;
  color: var(--color-text-soft);
  line-height: 1.6;
}

.site-main {
  display: block;
}

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

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

.breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  padding: 20px 0 0;
  font-size: 13px;
  color: var(--color-text-soft);
}

.breadcrumb a {
  color: var(--color-text-soft);
}

.breadcrumb a:hover,
.breadcrumb a:focus-visible {
  color: var(--color-accent-orange);
}

.breadcrumb-sep {
  color: var(--color-line-strong);
}

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

.page-header {
  padding: 18px 0 28px;
  border-bottom: 3px solid var(--color-primary);
  margin-bottom: 36px;
}

.page-title {
  font-size: 32px;
  font-weight: 700;
  color: var(--color-primary);
  line-height: 1.3;
}

.page-description {
  margin-top: 12px;
  font-size: 16px;
  line-height: 1.8;
  color: var(--color-text-soft);
  max-width: 820px;
}

.page-description a {
  color: var(--color-accent-orange);
  font-weight: 600;
  border-bottom: 1px solid rgba(228, 87, 46, 0.35);
}

.page-description a:hover,
.page-description a:focus-visible {
  border-bottom-color: var(--color-accent-orange);
}

.section {
  padding: 44px 0;
  border-top: 1px solid var(--color-line);
}

.section:first-of-type {
  border-top: none;
}

.section-head {
  margin-bottom: 24px;
}

.section-title {
  font-size: 23px;
  font-weight: 700;
  color: var(--color-primary);
  position: relative;
  padding-left: 14px;
}

.section-title::before {
  content: "";
  position: absolute;
  left: 0;
  top: 6px;
  bottom: 6px;
  width: 4px;
  border-radius: 2px;
  background-color: var(--color-accent-orange);
}

.section-desc {
  margin-top: 10px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--color-text-soft);
  max-width: 780px;
}

.section-intro {
  margin-top: 10px;
  margin-bottom: 22px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--color-text-soft);
  max-width: 780px;
}

.section-lead {
  margin-top: 10px;
  margin-bottom: 22px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--color-text-soft);
  max-width: 780px;
}

.section-foot {
  margin-top: 20px;
  font-size: 14px;
}

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

.section-note a {
  color: var(--color-accent-orange);
  font-weight: 600;
  margin-right: 16px;
}

.text-link {
  display: inline-flex;
  align-items: center;
  min-height: 40px;
  font-weight: 600;
  color: var(--color-accent-orange);
  border-bottom: 1px solid rgba(228, 87, 46, 0.4);
}

.text-link:hover,
.text-link:focus-visible {
  color: var(--color-primary);
  border-bottom-color: var(--color-primary);
}

/* ============ components ============ */

/* 表格 */
.table-wrap {
  width: 100%;
  overflow-x: auto;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
  background-color: var(--color-bg);
  box-shadow: var(--shadow-card);
}

.data-table {
  min-width: 640px;
  font-size: 14.5px;
  line-height: 1.7;
}

.table-caption,
.data-table-caption {
  caption-side: top;
  text-align: left;
  padding: 14px 18px;
  font-size: 13px;
  color: var(--color-text-soft);
  background-color: var(--color-bg-soft);
  border-bottom: 1px solid var(--color-line);
}

.data-table thead th {
  background-color: var(--color-primary);
  color: var(--color-text-invert);
  font-weight: 600;
  font-size: 14px;
  text-align: left;
  padding: 12px 18px;
  white-space: nowrap;
}

.data-table tbody th {
  text-align: left;
  font-weight: 600;
  color: var(--color-primary);
  padding: 13px 18px;
  vertical-align: top;
  white-space: nowrap;
  border-bottom: 1px solid var(--color-line);
}

.data-table tbody td {
  padding: 13px 18px;
  vertical-align: top;
  color: var(--color-text);
  border-bottom: 1px solid var(--color-line);
}

.data-table tbody tr:nth-child(even) th,
.data-table tbody tr:nth-child(even) td {
  background-color: var(--color-bg-soft);
}

.data-table tbody tr:hover th,
.data-table tbody tr:hover td {
  background-color: #EDF1F6;
}

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

.data-table tbody td a {
  color: var(--color-accent-orange);
  font-weight: 600;
}

.data-table tbody td a:hover,
.data-table tbody td a:focus-visible {
  color: var(--color-primary);
}

/* 图片容器 */
.hero-figure,
.entry-figure,
.media-figure,
.section-figure {
  position: relative;
  display: block;
  overflow: hidden;
  border-radius: var(--radius-lg);
  background-color: var(--color-bg-soft);
  box-shadow: var(--shadow-card);
}

.hero-figure img,
.entry-figure img,
.media-figure img,
.section-figure img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.hero-caption,
.media-caption,
.section-figure figcaption,
.media-figure figcaption {
  margin-top: 10px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--color-text-soft);
}

.media-figure-wide img {
  aspect-ratio: 16 / 7;
}

/* FAQ 原生展开 */
.faq-item {
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
  background-color: var(--color-bg);
  margin-bottom: 12px;
  overflow: hidden;
  transition: border-color 0.18s ease, box-shadow 0.18s ease;
}

.faq-item[open] {
  border-color: var(--color-primary-soft);
  box-shadow: var(--shadow-card);
}

.faq-question {
  display: flex;
  align-items: center;
  gap: 12px;
  min-height: 52px;
  padding: 12px 18px;
  font-size: 15.5px;
  font-weight: 600;
  color: var(--color-primary);
  cursor: pointer;
  list-style: none;
}

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

.faq-question::before {
  content: "";
  flex-shrink: 0;
  width: 8px;
  height: 8px;
  border-right: 2px solid var(--color-accent-orange);
  border-bottom: 2px solid var(--color-accent-orange);
  transform: rotate(-45deg);
  transition: transform 0.2s ease;
}

.faq-item[open] .faq-question::before {
  transform: rotate(45deg);
}

.faq-question:hover {
  color: var(--color-accent-orange);
}

.faq-answer {
  padding: 4px 18px 18px 38px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--color-text-soft);
  border-top: 1px dashed var(--color-line);
  margin-top: 2px;
  padding-top: 14px;
}

.faq-answer p + p {
  margin-top: 10px;
}

/* 下一步入口 */
.next-links,
.next-list {
  display: grid;
  gap: 14px;
}

.next-link,
.next-item > a {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 16px 20px;
  border: 1px solid var(--color-line);
  border-left: 4px solid var(--color-accent-orange);
  border-radius: var(--radius-lg);
  background-color: var(--color-bg);
  color: var(--color-primary);
  font-weight: 600;
  min-height: 44px;
  transition: border-color 0.18s ease, box-shadow 0.18s ease, transform 0.18s ease;
}

.next-link:hover,
.next-link:focus-visible,
.next-item > a:hover,
.next-item > a:focus-visible {
  border-color: var(--color-primary-soft);
  border-left-color: var(--color-primary);
  box-shadow: var(--shadow-raise);
  color: var(--color-primary);
}

.next-link-name {
  font-size: 16px;
}

.next-link-desc {
  font-size: 13.5px;
  font-weight: 400;
  color: var(--color-text-soft);
  line-height: 1.7;
}

.next-item > a {
  color: var(--color-primary);
}

/* ============ pages ============ */

/* 首页 hero */
.hero {
  padding: 40px 0 44px;
  border-bottom: 1px solid var(--color-line);
}

.hero-inner {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  gap: 40px;
  align-items: start;
}

.hero-eyebrow {
  display: inline-block;
  font-size: 13px;
  font-weight: 600;
  color: var(--color-accent-orange);
  letter-spacing: 0;
  padding: 4px 10px;
  border-radius: var(--radius-sm);
  background-color: rgba(228, 87, 46, 0.1);
  margin-bottom: 14px;
}

.hero-title {
  font-size: 38px;
  line-height: 1.28;
  font-weight: 700;
  color: var(--color-primary);
}

.hero-desc {
  margin-top: 16px;
  font-size: 16px;
  line-height: 1.85;
  color: var(--color-text-soft);
  max-width: 560px;
}

.hero-needs {
  margin-top: 26px;
  display: grid;
  gap: 10px;
}

.hero-need {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  padding: 12px 16px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
  background-color: var(--color-bg-soft);
  transition: border-color 0.18s ease, background-color 0.18s ease;
}

.hero-need:hover {
  border-color: var(--color-line-strong);
  background-color: var(--color-bg);
}

.hero-need-label {
  font-size: 14.5px;
  color: var(--color-text);
}

.hero-need-link {
  flex-shrink: 0;
  font-size: 14px;
  font-weight: 600;
  color: var(--color-accent-orange);
  min-height: 32px;
  display: inline-flex;
  align-items: center;
}

.hero-need-link:hover,
.hero-need-link:focus-visible {
  color: var(--color-primary);
}

.hero-visual {
  display: grid;
  gap: 20px;
}

.hero-figure img {
  aspect-ratio: 4 / 3;
}

.hero-flow {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 8px;
}

.hero-flow-item {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 12px 10px;
  border-radius: var(--radius-md);
  background-color: var(--color-bg-soft);
  border-top: 3px solid var(--color-accent-green);
  text-align: center;
}

.hero-flow-step {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  color: var(--color-accent-green);
}

.hero-flow-name {
  font-size: 13.5px;
  font-weight: 600;
  color: var(--color-primary);
  line-height: 1.5;
}

/* 首页需求对应表 */
.needs-table tbody td:first-child {
  font-weight: 600;
  color: var(--color-primary);
}

/* 首页流程条 */
.stage-strip {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
}

.stage-card {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 20px 18px;
  border: 1px solid var(--color-line);
  border-top: 4px solid var(--color-accent-green);
  border-radius: var(--radius-lg);
  background-color: var(--color-bg);
  box-shadow: var(--shadow-card);
}

.stage-index {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  color: var(--color-accent-green);
}

.stage-name {
  font-size: 17px;
  font-weight: 700;
  color: var(--color-primary);
}

.stage-detail {
  display: grid;
  gap: 4px;
  font-size: 13.5px;
  line-height: 1.7;
}

.stage-detail dt {
  font-weight: 600;
  color: var(--color-primary-soft);
  margin-top: 6px;
}

.stage-detail dd {
  color: var(--color-text-soft);
}

/* 首页双入口卡 */
.entry-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px;
}

.entry-card {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 0 0 20px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
  background-color: var(--color-bg);
  overflow: hidden;
  box-shadow: var(--shadow-card);
}

.entry-card-equipment {
  border-top: 4px solid var(--color-accent-orange);
}

.entry-card-maintenance {
  border-top: 4px solid var(--color-accent-green);
}

.entry-figure {
  border-radius: 0;
  box-shadow: none;
}

.entry-figure img {
  aspect-ratio: 16 / 9;
}

.entry-name {
  font-size: 18px;
  font-weight: 700;
  padding: 0 20px;
  margin-top: 6px;
}

.entry-name a {
  color: var(--color-primary);
}

.entry-name a:hover,
.entry-name a:focus-visible {
  color: var(--color-accent-orange);
}

.entry-scope {
  padding: 0 20px;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--color-text);
}

.entry-note {
  padding: 0 20px;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--color-text-soft);
}

/* 首页资料两栏 */
.resource-columns {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 24px;
}

.resource-col {
  padding: 22px 22px 24px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
  background-color: var(--color-bg-soft);
}

.resource-col-fault {
  border-left: 4px solid var(--color-accent-yellow);
}

.resource-col-doc {
  border-left: 4px solid var(--color-accent-green);
}

.resource-title {
  font-size: 18px;
  font-weight: 700;
  color: var(--color-primary);
}

.resource-desc {
  margin-top: 8px;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--color-text-soft);
}

.fault-list {
  margin-top: 16px;
  display: grid;
  gap: 2px;
}

.fault-item {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 14px;
  padding: 10px 0;
  border-bottom: 1px dashed var(--color-line-strong);
}

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

.fault-item a {
  font-size: 15px;
  font-weight: 600;
  color: var(--color-primary);
}

.fault-item a:hover,
.fault-item a:focus-visible {
  color: var(--color-accent-orange);
}

.fault-note {
  flex-shrink: 0;
  font-size: 12.5px;
  color: var(--color-text-soft);
}

.doc-list {
  margin-top: 16px;
  display: grid;
  gap: 10px;
}

.doc-term {
  font-family: var(--font-mono);
  font-size: 13.5px;
  font-weight: 700;
  color: var(--color-primary);
}

.doc-mean {
  font-size: 14px;
  line-height: 1.75;
  color: var(--color-text-soft);
  padding-left: 12px;
  border-left: 2px solid var(--color-line-strong);
}

.resource-foot {
  margin-top: 18px;
  font-size: 14px;
}

/* 首页准备与问答 */
.prep-columns {
  display: grid;
  grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
  gap: 28px;
  align-items: start;
}

.prep-title {
  font-size: 17px;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 12px;
}

.prep-list {
  display: grid;
  gap: 10px;
}

.prep-item {
  position: relative;
  padding-left: 22px;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--color-text);
}

.prep-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 9px;
  width: 8px;
  height: 8px;
  border-radius: 2px;
  background-color: var(--color-accent-orange);
}

.prep-note {
  margin-top: 16px;
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--color-text-soft);
  padding: 12px 14px;
  background-color: var(--color-bg-soft);
  border-radius: var(--radius-md);
}

.prep-foot {
  margin-top: 16px;
  font-size: 14px;
}

/* 首页栏目索引 */
.site-index {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.index-grid {
  display: contents;
}

.index-item {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 16px 18px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
  background-color: var(--color-bg);
  transition: border-color 0.18s ease, box-shadow 0.18s ease;
}

.index-item:hover {
  border-color: var(--color-primary-soft);
  box-shadow: var(--shadow-card);
}

.index-link {
  font-size: 15.5px;
  font-weight: 700;
  color: var(--color-primary);
}

.index-link:hover,
.index-link:focus-visible {
  color: var(--color-accent-orange);
}

.index-note {
  font-size: 13px;
  line-height: 1.7;
  color: var(--color-text-soft);
}

/* 设备目录页 */
.section-index-table .media-figure {
  margin-bottom: 24px;
}

.category-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.category-card {
  padding: 20px 20px 22px;
  border: 1px solid var(--color-line);
  border-top: 4px solid var(--color-accent-orange);
  border-radius: var(--radius-lg);
  background-color: var(--color-bg);
  box-shadow: var(--shadow-card);
}

.category-name {
  font-size: 17px;
  font-weight: 700;
  color: var(--color-primary);
}

.category-text {
  margin-top: 8px;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--color-text-soft);
}

.category-list {
  margin-top: 12px;
  display: grid;
  gap: 6px;
}

.category-list li {
  position: relative;
  padding-left: 18px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--color-text);
}

.category-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 9px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: var(--color-accent-orange);
}

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

.field-col {
  padding: 22px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
  background-color: var(--color-bg-soft);
}

.field-subtitle {
  font-size: 17px;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 14px;
}

.field-list {
  display: grid;
  gap: 12px;
}

.field-list dt {
  font-family: var(--font-mono);
  font-size: 13.5px;
  font-weight: 700;
  color: var(--color-primary);
}

.field-list dd {
  font-size: 14px;
  line-height: 1.75;
  color: var(--color-text-soft);
  padding-left: 12px;
  border-left: 2px solid var(--color-line-strong);
}

.field-tips {
  margin-top: 14px;
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--color-text-soft);
}

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

/* 维护计划页 */
.cycle-table tbody th {
  font-family: var(--font-mono);
}

.section-cycle .section-figure {
  margin-top: 26px;
}

.section-figure img {
  aspect-ratio: 16 / 8;
}

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

.duty-col {
  padding: 22px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
  background-color: var(--color-bg);
  box-shadow: var(--shadow-card);
}

.duty-col-service {
  border-top: 4px solid var(--color-accent-green);
}

.duty-col-client {
  border-top: 4px solid var(--color-accent-orange);
}

.duty-heading {
  font-size: 17px;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 14px;
}

.duty-list {
  display: grid;
  gap: 10px;
}

.duty-list li {
  position: relative;
  padding-left: 20px;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--color-text);
}

.duty-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 9px;
  width: 7px;
  height: 7px;
  border-radius: 2px;
  background-color: var(--color-accent-green);
}

.duty-col-client .duty-list li::before {
  background-color: var(--color-accent-orange);
}

.record-list {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
  counter-reset: record;
}

.record-item {
  padding: 20px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
  background-color: var(--color-bg-soft);
}

.record-heading {
  font-size: 16.5px;
  font-weight: 700;
  color: var(--color-primary);
}

.record-text {
  margin-top: 8px;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--color-text-soft);
}

.section-next .next-list {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

/* 故障指南页 */
.content-section {
  padding: 40px 0;
  border-top: 1px solid var(--color-line);
}

.content-section:first-of-type {
  border-top: none;
}

.fault-category .category-list {
  margin-top: 20px;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  display: grid;
  gap: 14px;
}

.category-item {
  padding: 16px 18px;
  border: 1px solid var(--color-line);
  border-left: 4px solid var(--color-accent-yellow);
  border-radius: var(--radius-lg);
  background-color: var(--color-bg-soft);
}

.category-link {
  font-size: 16px;
  font-weight: 700;
  color: var(--color-primary);
  display: inline-flex;
  align-items: center;
  min-height: 32px;
}

.category-link:hover,
.category-link:focus-visible {
  color: var(--color-accent-orange);
}

.category-note {
  margin-top: 6px;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--color-text-soft);
}

.fault-entry {
  padding: 24px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
  background-color: var(--color-bg);
  box-shadow: var(--shadow-card);
  margin-bottom: 20px;
}

.fault-entry:last-child {
  margin-bottom: 0;
}

.fault-name {
  font-size: 19px;
  font-weight: 700;
  color: var(--color-primary);
  padding-bottom: 12px;
  border-bottom: 2px solid var(--color-accent-yellow);
  margin-bottom: 16px;
}

.fault-block + .fault-block {
  margin-top: 20px;
}

.block-title {
  font-size: 15px;
  font-weight: 700;
  color: var(--color-primary-soft);
  margin-bottom: 10px;
}

.block-list {
  display: grid;
  gap: 10px;
}

.block-list li {
  position: relative;
  padding-left: 20px;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--color-text);
}

.block-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 9px;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background-color: var(--color-accent-yellow);
}

.block-list li a {
  color: var(--color-accent-orange);
  font-weight: 600;
}

.block-list li a:hover,
.block-list li a:focus-visible {
  color: var(--color-primary);
}

.step-list {
  counter-reset: step;
  display: grid;
  gap: 10px;
}

.step-list li {
  counter-increment: step;
  position: relative;
  padding-left: 38px;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--color-text);
  min-height: 26px;
}

.step-list li::before {
  content: counter(step);
  position: absolute;
  left: 0;
  top: 1px;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background-color: var(--color-accent-green);
  color: var(--color-text-invert);
  font-family: var(--font-mono);
  font-size: 12.5px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
}

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

.escalation-col {
  padding: 22px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
  background-color: var(--color-bg-soft);
}

.escalation-condition {
  border-top: 4px solid var(--color-accent-yellow);
}

.escalation-info {
  border-top: 4px solid var(--color-accent-green);
}

.col-title {
  font-size: 17px;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 14px;
}

.col-note {
  margin-top: 14px;
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--color-text-soft);
}

.col-note a {
  color: var(--color-accent-orange);
  font-weight: 600;
}

.fault-media .media-figure img {
  aspect-ratio: 16 / 8;
}

.fault-media .media-caption {
  margin-top: 10px;
}

.next-step .next-list {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

/* 服务流程页 */
.stage-list {
  display: grid;
  gap: 18px;
}

.stage-item {
  display: block;
}

.stage-item .stage-card {
  border-top: none;
  border-left: 4px solid var(--color-accent-green);
  padding: 24px 26px;
}

.stage-item .stage-index {
  font-size: 13px;
}

.stage-item .stage-name {
  font-size: 20px;
  margin-top: 4px;
}

.stage-summary {
  margin-top: 10px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--color-text-soft);
  max-width: 760px;
}

.stage-item .stage-detail {
  margin-top: 16px;
  grid-template-columns: minmax(0, 1fr);
  gap: 6px;
  font-size: 14.5px;
}

.stage-item .stage-detail dt {
  font-weight: 700;
  color: var(--color-primary-soft);
  margin-top: 10px;
}

.stage-item .stage-detail dd {
  color: var(--color-text);
  line-height: 1.75;
}

.process-media .media-figure img {
  aspect-ratio: 16 / 8;
}

.prepare-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
}

.prepare-card {
  padding: 20px 18px;
  border: 1px solid var(--color-line);
  border-top: 4px solid var(--color-accent-orange);
  border-radius: var(--radius-lg);
  background-color: var(--color-bg);
  box-shadow: var(--shadow-card);
}

.prepare-name {
  font-size: 16.5px;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 12px;
}

.prepare-list {
  display: grid;
  gap: 8px;
}

.prepare-list li {
  position: relative;
  padding-left: 18px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--color-text);
}

.prepare-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 9px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: var(--color-accent-orange);
}

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

.accept-col {
  padding: 22px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
  background-color: var(--color-bg-soft);
}

.accept-name {
  font-size: 17px;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 14px;
}

.accept-list {
  display: grid;
  gap: 10px;
}

.accept-list li {
  position: relative;
  padding-left: 20px;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--color-text);
}

.accept-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 9px;
  width: 7px;
  height: 7px;
  border-radius: 2px;
  background-color: var(--color-accent-green);
}

.process-accept .accept-columns .accept-col:last-child .accept-list li::before {
  background-color: var(--color-accent-yellow);
}

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

/* 常见问题页 */
.scope-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.scope-item {
  padding: 18px 20px;
  border: 1px solid var(--color-line);
  border-left: 4px solid var(--color-accent-orange);
  border-radius: var(--radius-lg);
  background-color: var(--color-bg-soft);
}

.scope-name {
  font-size: 16px;
  font-weight: 700;
  color: var(--color-primary);
}

.scope-text {
  margin-top: 8px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--color-text-soft);
}

.faq-list {
  display: grid;
  gap: 0;
}

.faq-media .media-figure img {
  aspect-ratio: 16 / 8;
}

.section-text {
  margin-top: 16px;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--color-text-soft);
  max-width: 780px;
}

.section-text a {
  color: var(--color-accent-orange);
  font-weight: 600;
}

.next-step .section-text + .next-list {
  margin-top: 20px;
}

.next-step .next-list {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

/* 404 */
.error-main {
  max-width: var(--container-narrow);
  margin: 0 auto;
  padding: 0 24px 80px;
}

.error-block {
  padding: 72px 0 24px;
  text-align: left;
  max-width: 720px;
}

.error-block h1 {
  font-size: 34px;
  font-weight: 700;
  color: var(--color-primary);
}

.error-text {
  margin-top: 16px;
  font-size: 16px;
  line-height: 1.85;
  color: var(--color-text-soft);
}

.error-note {
  margin-top: 12px;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--color-text-soft);
}

.error-actions {
  margin-top: 28px;
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0 24px;
  border-radius: var(--radius-lg);
  font-size: 15px;
  font-weight: 600;
  border: 1px solid transparent;
  transition: background-color 0.18s ease, color 0.18s ease, border-color 0.18s ease;
}

.btn-primary {
  background-color: var(--color-accent-orange);
  color: var(--color-text-invert);
}

.btn-primary:hover,
.btn-primary:focus-visible {
  background-color: #C8461F;
  color: var(--color-text-invert);
}

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

.btn-ghost:hover,
.btn-ghost:focus-visible {
  background-color: var(--color-primary);
  color: var(--color-text-invert);
}

/* 页脚 */
.site-footer {
  background-color: var(--color-primary);
  color: rgba(255, 255, 255, 0.78);
  margin-top: 40px;
}

.footer-inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: 48px 24px 32px;
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) repeat(3, minmax(0, 1fr));
  gap: 32px;
}

.footer-brand {
  grid-column: 1 / 2;
}

.footer-name {
  font-size: 18px;
  font-weight: 700;
  color: var(--color-text-invert);
}

.footer-desc {
  margin-top: 12px;
  font-size: 14px;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.72);
  max-width: 320px;
}

.footer-title {
  font-size: 14.5px;
  font-weight: 700;
  color: var(--color-text-invert);
  margin-bottom: 14px;
}

.footer-list {
  display: grid;
  gap: 10px;
}

.footer-list a {
  color: rgba(255, 255, 255, 0.76);
  font-size: 14px;
  display: inline-flex;
  align-items: center;
  min-height: 28px;
}

.footer-list a:hover,
.footer-list a:focus-visible {
  color: var(--color-text-invert);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.footer-text {
  font-size: 13.5px;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.72);
}

.footer-copy {
  grid-column: 1 / -1;
  margin-top: 8px;
  padding-top: 20px;
  border-top: 1px solid rgba(255, 255, 255, 0.16);
  font-size: 13px;
  color: rgba(255, 255, 255, 0.6);
}

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

@media (max-width: 1024px) {
  .header-inner {
    gap: 20px;
  }

  .brand-slogan {
    display: none;
  }

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

  .hero-title {
    font-size: 32px;
  }

  .hero-desc {
    max-width: none;
  }

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

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

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

  .footer-inner {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 28px;
  }

  .footer-brand {
    grid-column: 1 / -1;
  }
}

@media (max-width: 768px) {
  body.site-body {
    font-size: 15.5px;
  }

  .header-inner {
    padding: 12px 18px;
    flex-wrap: wrap;
  }

  .nav-toggle {
    display: flex;
  }

  .site-nav {
    width: 100%;
    margin-left: 0;
    order: 3;
  }

  .nav-list {
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 2px;
    padding: 10px 0 4px;
    border-top: 1px solid rgba(255, 255, 255, 0.16);
  }

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

  .nav-link {
    width: 100%;
    padding: 0 12px;
    border-radius: var(--radius-md);
  }

  .nav-link.is-current {
    box-shadow: inset 3px 0 0 var(--color-accent-orange);
  }

  .home-main,
  .inner-main,
  .error-main {
    padding-left: 18px;
    padding-right: 18px;
  }

  .top-line-text {
    padding: 8px 18px;
  }

  .page-header {
    padding: 16px 0 22px;
    margin-bottom: 28px;
  }

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

  .page-description {
    font-size: 15px;
  }

  .section {
    padding: 34px 0;
  }

  .content-section {
    padding: 32px 0;
  }

  .section-title {
    font-size: 20px;
  }

  .hero {
    padding: 28px 0 34px;
  }

  .hero-title {
    font-size: 27px;
  }

  .hero-need {
    flex-direction: column;
    align-items: flex-start;
    gap: 6px;
  }

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

  .stage-item .stage-card {
    padding: 20px 18px;
  }

  .footer-inner {
    grid-template-columns: minmax(0, 1fr);
    gap: 24px;
    padding: 36px 18px 26px;
  }

  .footer-desc {
    max-width: none;
  }
}

@media (max-width: 480px) {
  .header-inner {
    padding: 10px 14px;
  }

  .brand-name {
    font-size: 17px;
  }

  .home-main,
  .inner-main,
  .error-main {
    padding-left: 14px;
    padding-right: 14px;
  }

  .top-line-text {
    padding: 8px 14px;
  }

  .hero-title {
    font-size: 24px;
  }

  .page-title {
    font-size: 23px;
  }

  .section-title {
    font-size: 18.5px;
  }

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

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

  .fault-entry {
    padding: 18px 16px;
  }

  .fault-name {
    font-size: 17px;
  }

  .error-block {
    padding: 48px 0 16px;
  }

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

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

  .btn {
    width: 100%;
  }
}

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

  *,
  *::before,
  *::after {
    transition-duration: 0.001ms !important;
    animation-duration: 0.001ms !important;
  }
}