/* ==========================================================================
   看片娱乐 scmtcc.com — 全站样式表
   分组：base / layout / components / pages / responsive
   ========================================================================== */

/* ==========================================================================
   base — 变量、重置、排版基线
   ========================================================================== */

:root {
  --c-bg: #F5F7FA;
  --c-surface: #FFFFFF;
  --c-ink: #111827;
  --c-text: #374151;
  --c-muted: #4B5563;
  --c-border: #D1D5DB;
  --c-border-soft: #E5E7EB;
  --c-line-blue: #2563EB;
  --c-line-green: #059669;
  --c-line-orange: #EA580C;
  --c-line-purple: #7C3AED;
  --c-alert: #D97706;
  --radius: 8px;
  --radius-sm: 4px;
  --shadow-card: 0 1px 2px rgba(17, 24, 39, 0.06);
  --shadow-raise: 0 4px 14px rgba(17, 24, 39, 0.08);
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", "Source Han Sans SC", sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono",
    "Courier New", monospace;
  --shell-wide: 1200px;
  --shell-inner: 1080px;
  --gap: 24px;
}

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

html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  background-color: var(--c-bg);
  color: var(--c-text);
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.7;
  font-weight: 400;
}

h1,
h2,
h3,
h4 {
  margin: 0;
  color: var(--c-ink);
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: 0;
}

h1 {
  font-size: 2.25rem;
}

h2 {
  font-size: 1.375rem;
}

h3 {
  font-size: 1.0625rem;
}

p {
  margin: 0;
}

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

a {
  color: var(--c-line-blue);
  text-decoration: none;
}

a:hover,
a:focus-visible {
  text-decoration: underline;
}

a:focus-visible,
button:focus-visible,
summary:focus-visible {
  outline: 2px solid var(--c-line-blue);
  outline-offset: 2px;
}

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

figure {
  margin: 0;
}

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

button {
  font: inherit;
  color: inherit;
}

strong {
  color: var(--c-ink);
  font-weight: 600;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  border: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
  white-space: nowrap;
}

/* ==========================================================================
   layout — 全站骨架：页头、主导航、主容器、面包屑、页脚、移动导航
   ========================================================================== */

.site-body {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  background-color: var(--c-bg);
  color: var(--c-text);
  font-family: var(--font-sans);
  line-height: 1.7;
}

/* --- 页头 --- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background-color: var(--c-surface);
  border-bottom: 1px solid var(--c-border-soft);
}

.header-inner {
  display: flex;
  align-items: center;
  gap: 20px;
  width: 100%;
  max-width: var(--shell-wide);
  margin: 0 auto;
  padding: 12px 24px;
}

.brand {
  flex: none;
  color: var(--c-ink);
  font-size: 1.125rem;
  font-weight: 700;
  letter-spacing: 0;
}

.brand:hover,
.brand:focus-visible {
  color: var(--c-line-blue);
  text-decoration: none;
}

.brand-tagline {
  flex: none;
  padding-left: 16px;
  border-left: 1px solid var(--c-border);
  color: var(--c-muted);
  font-size: 0.8125rem;
  line-height: 1.4;
}

/* --- 主导航 --- */

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

.site-nav ul {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 4px;
}

.site-nav a {
  display: block;
  padding: 8px 12px;
  border-bottom: 2px solid transparent;
  color: var(--c-text);
  font-size: 0.9375rem;
  line-height: 1.5;
  white-space: nowrap;
}

.site-nav a:hover,
.site-nav a:focus-visible {
  border-bottom-color: var(--c-line-blue);
  color: var(--c-ink);
  text-decoration: none;
}

.site-nav a.is-current {
  border-bottom-color: var(--c-line-blue);
  color: var(--c-ink);
  font-weight: 600;
}

/* --- 主内容 --- */

.site-main {
  flex: 1 1 auto;
  width: 100%;
}

.home-main {
  max-width: var(--shell-wide);
  margin: 0 auto;
  padding: 0 24px 56px;
}

.inner-main {
  max-width: var(--shell-inner);
  margin: 0 auto;
  padding: 24px 24px 56px;
}

/* --- 面包屑 --- */

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin-bottom: 16px;
  color: var(--c-muted);
  font-size: 0.8125rem;
  line-height: 1.5;
}

.breadcrumb a {
  color: var(--c-muted);
}

.breadcrumb a:hover,
.breadcrumb a:focus-visible {
  color: var(--c-line-blue);
}

.breadcrumb-sep {
  color: var(--c-border);
}

.breadcrumb-current {
  color: var(--c-ink);
}

/* --- 页标题区 --- */

.page-header {
  margin-bottom: 20px;
}

.page-title {
  color: var(--c-ink);
  font-size: 2rem;
  font-weight: 700;
  line-height: 1.25;
}

/* --- 页脚 --- */

.site-footer {
  background-color: var(--c-ink);
  color: #D1D5DB;
  font-size: 0.8125rem;
}

.footer-inner {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(0, 2fr) minmax(0, 1.4fr) auto;
  align-items: center;
  gap: 16px 28px;
  width: 100%;
  max-width: var(--shell-wide);
  margin: 0 auto;
  padding: 20px 24px;
}

.footer-name {
  color: #FFFFFF;
  font-size: 0.9375rem;
  font-weight: 700;
  line-height: 1.4;
}

.footer-desc {
  margin-top: 4px;
  color: #9CA3AF;
  line-height: 1.5;
}

.footer-nav ul {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 16px;
}

.footer-nav a {
  color: #D1D5DB;
  line-height: 1.5;
}

.footer-nav a:hover,
.footer-nav a:focus-visible {
  color: #FFFFFF;
}

.footer-boundary {
  color: #9CA3AF;
  line-height: 1.5;
}

.footer-copy {
  color: #6B7280;
  line-height: 1.5;
  white-space: nowrap;
}

.back-to-top {
  justify-self: end;
  display: inline-block;
  padding: 8px 12px;
  border: 1px solid #374151;
  border-radius: var(--radius-sm);
  color: #D1D5DB;
  line-height: 1.4;
  white-space: nowrap;
}

.back-to-top:hover,
.back-to-top:focus-visible {
  border-color: #9CA3AF;
  color: #FFFFFF;
  text-decoration: none;
}

/* --- 移动端底部任务导航（桌面隐藏） --- */

.mobile-bottom-nav {
  display: none;
}

/* ==========================================================================
   components — 通用组件
   ========================================================================== */

/* --- 区块标题组 --- */

.section-head {
  max-width: 720px;
  margin-bottom: 20px;
}

.section-head h2 {
  padding-left: 12px;
  border-left: 4px solid var(--c-line-blue);
}

.section-head p {
  margin-top: 8px;
  color: var(--c-muted);
  font-size: 0.9375rem;
}

.section-note,
.section-intro,
.section-lead {
  margin-top: 8px;
  color: var(--c-muted);
  font-size: 0.9375rem;
  line-height: 1.7;
}

.section-note a,
.section-intro a {
  color: var(--c-line-blue);
}

/* --- 按钮 --- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 10px 20px;
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  font-size: 0.9375rem;
  font-weight: 600;
  line-height: 1.4;
  text-align: center;
}

.btn:hover,
.btn:focus-visible {
  text-decoration: none;
}

.btn-primary {
  background-color: var(--c-line-blue);
  border-color: var(--c-line-blue);
  color: #FFFFFF;
}

.btn-primary:hover,
.btn-primary:focus-visible {
  background-color: #1D4ED8;
  border-color: #1D4ED8;
}

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

.btn-ghost:hover,
.btn-ghost:focus-visible {
  border-color: var(--c-ink);
  background-color: var(--c-surface);
}

/* --- 文字链接 --- */

.text-link {
  display: inline-block;
  margin-top: 12px;
  color: var(--c-line-blue);
  font-size: 0.9375rem;
  font-weight: 600;
}

.text-link::after {
  content: " →";
  font-weight: 400;
}

/* --- 线路色工具类 --- */

.line-blue {
  --line-color: var(--c-line-blue);
}

.line-green {
  --line-color: var(--c-line-green);
}

.line-orange {
  --line-color: var(--c-line-orange);
}

.line-purple {
  --line-color: var(--c-line-purple);
}

.line-code,
.line-badge,
.line-tag,
.station-code,
.station-num,
.prep-code,
.path-code,
.page-code,
.title-line-code,
.group-num,
.branch-code {
  font-family: var(--font-mono);
}

.line-code {
  color: var(--line-color, var(--c-line-blue));
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.line-tag {
  display: inline-block;
  padding: 2px 8px;
  border: 1px solid var(--line-color, var(--c-line-blue));
  border-radius: var(--radius-sm);
  color: var(--line-color, var(--c-line-blue));
  font-size: 0.75rem;
  font-weight: 600;
  line-height: 1.6;
}

/* --- 线路卡（首页 + 服务线路页共用基础） --- */

.line-card {
  position: relative;
  padding: 18px 20px;
  background-color: var(--c-surface);
  border: 1px solid var(--c-border-soft);
  border-top: 4px solid var(--line-color, var(--c-line-blue));
  border-radius: var(--radius);
  box-shadow: var(--shadow-card);
}

.line-card h3 {
  margin-top: 6px;
  color: var(--c-ink);
}

/* --- 数据表 --- */

.data-table {
  width: 100%;
  background-color: var(--c-surface);
  border: 1px solid var(--c-border-soft);
  border-radius: var(--radius);
  font-size: 0.875rem;
  text-align: left;
  overflow: hidden;
}

.data-table caption {
  text-align: left;
}

.data-table th,
.data-table td {
  padding: 10px 14px;
  border-bottom: 1px solid var(--c-border-soft);
  vertical-align: top;
  line-height: 1.6;
}

.data-table thead th {
  background-color: #F9FAFB;
  color: var(--c-ink);
  font-weight: 600;
  white-space: nowrap;
}

.data-table tbody tr:last-child th,
.data-table tbody tr:last-child td {
  border-bottom: 0;
}

.data-table tbody th {
  color: var(--c-ink);
  font-weight: 600;
}

/* --- 媒体图 --- */

.media-figure,
.hero-media,
.section-media,
.aside-media {
  overflow: hidden;
  border: 1px solid var(--c-border-soft);
  border-radius: var(--radius);
  background-color: var(--c-surface);
}

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

.hero-media figcaption,
.media-figure figcaption,
.section-media figcaption,
.aside-media figcaption {
  padding: 8px 12px;
  border-top: 1px solid var(--c-border-soft);
  color: var(--c-muted);
  font-size: 0.8125rem;
  line-height: 1.5;
}

/* --- FAQ 折叠 --- */

.faq-item {
  border: 1px solid var(--c-border-soft);
  border-radius: var(--radius);
  background-color: var(--c-surface);
}

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

.faq-item summary {
  position: relative;
  padding: 14px 44px 14px 16px;
  color: var(--c-ink);
  font-size: 0.9375rem;
  font-weight: 600;
  line-height: 1.5;
  cursor: pointer;
  list-style: none;
}

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

.faq-item summary::after {
  content: "+";
  position: absolute;
  top: 50%;
  right: 16px;
  transform: translateY(-50%);
  color: var(--c-line-blue);
  font-family: var(--font-mono);
  font-size: 1.125rem;
  line-height: 1;
}

.faq-item[open] summary::after {
  content: "–";
}

.faq-item[open] summary {
  border-bottom: 1px solid var(--c-border-soft);
}

.faq-item > p,
.faq-answer {
  padding: 12px 16px;
  color: var(--c-muted);
  font-size: 0.875rem;
  line-height: 1.7;
}

.faq-item > p a {
  display: inline-block;
  margin-top: 6px;
  font-weight: 600;
}

/* --- 说明侧栏通用块 --- */

.aside-block,
.side-block,
.sidebar-block {
  padding: 16px 18px;
  background-color: var(--c-surface);
  border: 1px solid var(--c-border-soft);
  border-left: 3px solid var(--c-line-blue);
  border-radius: var(--radius);
}

.aside-block + .aside-block,
.side-block + .side-block,
.sidebar-block + .sidebar-block {
  margin-top: 16px;
}

.aside-block h2,
.side-block h2,
.sidebar-block h2,
.sidebar-title {
  color: var(--c-ink);
  font-size: 0.9375rem;
}

.aside-block p,
.side-block p,
.sidebar-block p {
  margin-top: 8px;
  color: var(--c-muted);
  font-size: 0.875rem;
  line-height: 1.7;
}

.aside-links,
.aside-list,
.sidebar-links,
.sidebar-list {
  margin-top: 10px;
}

.aside-links li + li,
.aside-list li + li,
.sidebar-links li + li,
.sidebar-list li + li {
  margin-top: 6px;
}

.aside-links a,
.aside-list a,
.sidebar-links a,
.sidebar-list a {
  font-size: 0.875rem;
  font-weight: 600;
}

/* ==========================================================================
   pages — 首页
   ========================================================================== */

/* --- hero 极简首屏：左文右图 --- */

.hero {
  padding: 32px 0 40px;
  border-bottom: 1px solid var(--c-border-soft);
}

.hero-inner {
  display: grid;
  grid-template-columns: minmax(320px, 1fr) minmax(360px, 1.1fr);
  align-items: center;
  gap: 40px;
}

.hero-text {
  max-width: 560px;
}

.hero-kicker {
  color: var(--c-line-blue);
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.hero-text h1 {
  margin-top: 10px;
  font-size: 2.25rem;
}

.hero-lead {
  margin-top: 14px;
  color: var(--c-muted);
  font-size: 1rem;
  line-height: 1.75;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 22px;
}

.hero-media img {
  aspect-ratio: 16 / 10;
}

/* --- 现象选择板 --- */

.issue-selector {
  padding: 40px 0;
  border-bottom: 1px solid var(--c-border-soft);
}

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

.issue-card {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 16px 18px;
  background-color: var(--c-surface);
  border: 1px solid var(--c-border-soft);
  border-radius: var(--radius);
  box-shadow: var(--shadow-card);
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.issue-card:hover {
  border-color: var(--line-color, var(--c-line-blue));
  box-shadow: var(--shadow-raise);
}

.issue-card .issue-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border: 1px solid var(--line-color, var(--c-line-blue));
  border-radius: var(--radius-sm);
  color: var(--line-color, var(--c-line-blue));
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  font-weight: 700;
}

.issue-card h3 {
  font-size: 1rem;
}

.issue-card p {
  color: var(--c-muted);
  font-size: 0.875rem;
  line-height: 1.65;
}

.issue-card .line-tag {
  align-self: flex-start;
}

.issue-card a {
  margin-top: auto;
  font-size: 0.875rem;
  font-weight: 600;
}

/* --- 服务线路总览 --- */

.service-lines {
  padding: 40px 0;
  border-bottom: 1px solid var(--c-border-soft);
}

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

.lines-grid .line-card {
  display: flex;
  flex-direction: column;
}

.lines-grid .line-fit,
.lines-grid .line-deliver {
  margin-top: 8px;
  color: var(--c-muted);
  font-size: 0.875rem;
  line-height: 1.6;
}

.lines-grid .line-card a {
  margin-top: auto;
  padding-top: 12px;
  font-size: 0.875rem;
  font-weight: 600;
}

/* --- 典型服务场景 --- */

.scenario-cards {
  padding: 40px 0;
  border-bottom: 1px solid var(--c-border-soft);
}

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

.scenario-item {
  display: flex;
  flex-direction: column;
  padding: 18px 20px;
  background-color: var(--c-surface);
  border: 1px solid var(--c-border-soft);
  border-radius: var(--radius);
  box-shadow: var(--shadow-card);
}

.scenario-item h3 {
  font-size: 1.0625rem;
}

.scenario-item .scenario-feature,
.scenario-item .scenario-issue,
.scenario-item .scenario-line {
  margin-top: 8px;
  color: var(--c-muted);
  font-size: 0.875rem;
  line-height: 1.65;
}

.scenario-item a {
  margin-top: auto;
  padding-top: 12px;
  font-size: 0.875rem;
  font-weight: 600;
}

/* --- 图片 + 要点横带 --- */

.media-band {
  padding: 40px 0;
  border-bottom: 1px solid var(--c-border-soft);
}

.media-band-inner {
  display: grid;
  grid-template-columns: minmax(300px, 1fr) minmax(320px, 1.1fr);
  align-items: center;
  gap: 32px;
}

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

.media-text h2 {
  padding-left: 12px;
  border-left: 4px solid var(--c-line-green);
}

.media-text > p {
  margin-top: 10px;
  color: var(--c-muted);
  font-size: 0.9375rem;
}

.media-points {
  margin-top: 14px;
}

.media-points li {
  position: relative;
  padding-left: 20px;
  color: var(--c-text);
  font-size: 0.9375rem;
  line-height: 1.7;
}

.media-points li + li {
  margin-top: 8px;
}

.media-points li::before {
  content: "";
  position: absolute;
  top: 11px;
  left: 0;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--c-line-green);
}

/* --- 执行节点预览 --- */

.process-stations {
  padding: 40px 0;
  border-bottom: 1px solid var(--c-border-soft);
}

.station-list {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 14px;
}

.station-item {
  display: flex;
  flex-direction: column;
  padding: 16px;
  background-color: var(--c-surface);
  border: 1px solid var(--c-border-soft);
  border-radius: var(--radius);
  box-shadow: var(--shadow-card);
}

.station-code {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 26px;
  border-radius: var(--radius-sm);
  background-color: var(--c-ink);
  color: #FFFFFF;
  font-size: 0.75rem;
  font-weight: 700;
}

.station-item h3 {
  margin-top: 10px;
  font-size: 0.9375rem;
}

.station-action,
.station-deliver {
  margin-top: 8px;
  color: var(--c-muted);
  font-size: 0.8125rem;
  line-height: 1.6;
}

/* --- 交付标准摘要 --- */

.standards-table {
  padding: 40px 0;
  border-bottom: 1px solid var(--c-border-soft);
}

.standards-layout {
  display: grid;
  grid-template-columns: minmax(0, 2fr) minmax(260px, 1fr);
  align-items: start;
  gap: 28px;
}

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

.standards-aside {
  padding: 16px 18px;
  background-color: var(--c-surface);
  border: 1px solid var(--c-border-soft);
  border-left: 3px solid var(--c-alert);
  border-radius: var(--radius);
}

.standards-aside h3 {
  color: var(--c-ink);
  font-size: 0.9375rem;
}

.standards-aside p {
  margin-top: 8px;
  color: var(--c-muted);
  font-size: 0.875rem;
  line-height: 1.7;
}

/* --- 常见问题预览 --- */

.faq-preview {
  padding: 40px 0;
  border-bottom: 1px solid var(--c-border-soft);
}

.faq-list {
  max-width: 860px;
}

/* --- 合作洽谈准备 --- */

.contact-prep {
  padding: 40px 0 8px;
}

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

.prep-step {
  padding: 16px 18px;
  background-color: var(--c-surface);
  border: 1px solid var(--c-border-soft);
  border-radius: var(--radius);
  box-shadow: var(--shadow-card);
}

.prep-code {
  color: var(--c-line-blue);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.06em;
}

.prep-step h3 {
  margin-top: 6px;
  font-size: 1rem;
}

.prep-step p {
  margin-top: 8px;
  color: var(--c-muted);
  font-size: 0.875rem;
  line-height: 1.65;
}

.prep-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}

/* ==========================================================================
   pages — 内页共用外壳与两栏
   ========================================================================== */

.page-layout {
  display: grid;
  grid-template-columns: minmax(0, 2fr) minmax(260px, 1fr);
  align-items: start;
  gap: 32px;
}

.content-main,
.page-primary,
.page-content,
.main-column,
.layout-main,
.faq-body {
  min-width: 0;
}

.content-aside,
.page-sidebar,
.page-aside,
.side-column,
.layout-aside,
.faq-aside {
  min-width: 0;
}

/* 内页标题区附加行 */

.page-title .line-code,
.page-title .page-code,
.page-title .title-line-code {
  margin-bottom: 6px;
}

.page-lead,
.page-intro,
.page-task {
  max-width: 68ch;
  margin-top: 10px;
  color: var(--c-muted);
  font-size: 0.9375rem;
  line-height: 1.75;
}

.page-kicker {
  color: var(--c-line-blue);
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.page-title .page-lead {
  margin-top: 8px;
}

.page-title .line-dot {
  display: inline-block;
  width: 8px;
  height: 8px;
  margin-right: 8px;
  border-radius: 50%;
  background-color: var(--c-line-blue);
  vertical-align: middle;
}

.page-title .line-dot.line-all {
  background-color: var(--c-line-purple);
}

/* 内页区块间距 */

.page-layout > * > section + section,
.page-layout > * > figure + section,
.page-layout > * > section + figure {
  margin-top: 36px;
}

/* ==========================================================================
   pages — 服务线路页
   ========================================================================== */

.line-title .line-code {
  margin-bottom: 6px;
}

/* 线路筛选 */

.line-filter {
  padding-bottom: 4px;
}

.filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 14px;
}

.filter-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 44px;
  padding: 8px 16px;
  background-color: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-sm);
  color: var(--c-text);
  font-size: 0.875rem;
  font-weight: 600;
  cursor: pointer;
}

.filter-btn::before {
  content: "";
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background-color: var(--line-color, var(--c-line-blue));
}

.filter-btn:hover {
  border-color: var(--line-color, var(--c-line-blue));
  color: var(--c-ink);
}

.filter-btn.is-active {
  border-color: var(--line-color, var(--c-line-blue));
  background-color: var(--c-surface);
  color: var(--c-ink);
  box-shadow: inset 0 -3px 0 var(--line-color, var(--c-line-blue));
}

/* 线路详情卡 */

.line-detail {
  display: grid;
  gap: 16px;
}

.line-detail > h2 {
  padding-left: 12px;
  border-left: 4px solid var(--c-line-blue);
}

.line-detail .line-card {
  display: block;
}

.line-card-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px 12px;
  padding-bottom: 10px;
  border-bottom: 1px dashed var(--c-border);
}

.line-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 56px;
  padding: 2px 8px;
  border-radius: var(--radius-sm);
  background-color: var(--line-color, var(--c-line-blue));
  color: #FFFFFF;
  font-size: 0.75rem;
  font-weight: 700;
}

.line-card-head h3 {
  margin: 0;
  font-size: 1.0625rem;
}

.line-sub {
  color: var(--c-muted);
  font-size: 0.8125rem;
}

.line-desc {
  margin-top: 12px;
  color: var(--c-text);
  font-size: 0.9375rem;
  line-height: 1.75;
}

.line-spec {
  display: grid;
  grid-template-columns: 110px minmax(0, 1fr);
  gap: 6px 14px;
  margin-top: 14px;
  padding-top: 12px;
  border-top: 1px solid var(--c-border-soft);
  font-size: 0.875rem;
}

.line-spec dt {
  color: var(--c-ink);
  font-weight: 600;
}

.line-spec dd {
  margin: 0;
  color: var(--c-muted);
  line-height: 1.65;
}

.line-links {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 20px;
  margin-top: 14px;
  padding-top: 12px;
  border-top: 1px solid var(--c-border-soft);
  font-size: 0.875rem;
  font-weight: 600;
}

/* 线路对照表 */

.compare-table .table-wrap {
  overflow-x: auto;
  border-radius: var(--radius);
}

.compare-table table {
  min-width: 640px;
  background-color: var(--c-surface);
  border: 1px solid var(--c-border-soft);
  border-radius: var(--radius);
  font-size: 0.875rem;
  text-align: left;
}

.compare-table caption {
  padding-bottom: 8px;
  color: var(--c-muted);
  font-size: 0.8125rem;
  text-align: left;
}

.compare-table th,
.compare-table td {
  padding: 10px 14px;
  border-bottom: 1px solid var(--c-border-soft);
  vertical-align: top;
  line-height: 1.6;
}

.compare-table thead th {
  background-color: #F9FAFB;
  color: var(--c-ink);
  font-weight: 600;
  white-space: nowrap;
}

.compare-table tbody tr:last-child th,
.compare-table tbody tr:last-child td {
  border-bottom: 0;
}

/* 资料准备 + 图片 */

.line-prep .media-figure {
  margin-bottom: 20px;
}

.line-prep .media-figure img {
  aspect-ratio: 16 / 9;
}

.prep-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.prep-list li {
  padding: 14px 16px;
  background-color: var(--c-surface);
  border: 1px solid var(--c-border-soft);
  border-radius: var(--radius);
}

.prep-list h3 {
  font-size: 0.9375rem;
}

.prep-list p {
  margin-top: 6px;
  color: var(--c-muted);
  font-size: 0.875rem;
  line-height: 1.65;
}

/* ==========================================================================
   pages — 现象诊断页
   ========================================================================== */

.page-issue-diagnosis .breadcrumb {
  margin-top: 0;
}

.page-issue-diagnosis .page-header {
  margin-bottom: 16px;
}

.page-issue-diagnosis .page-title {
  margin-bottom: 0;
}

/* 现象选择器 */

.issue-selector .section-intro {
  max-width: 68ch;
}

.page-issue-diagnosis .issue-grid {
  margin-top: 16px;
}

.issue-item {
  display: flex;
}

.issue-btn {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 8px;
  width: 100%;
  min-height: 44px;
  padding: 14px 16px;
  background-color: var(--c-surface);
  border: 1px solid var(--c-border-soft);
  border-radius: var(--radius);
  text-align: left;
  cursor: pointer;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.issue-btn:hover {
  border-color: var(--c-line-blue);
  box-shadow: var(--shadow-card);
}

.issue-btn[aria-expanded="true"] {
  border-color: var(--c-line-blue);
  box-shadow: inset 0 -3px 0 var(--c-line-blue);
}

.issue-btn .issue-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 30px;
  height: 30px;
  border: 1px solid var(--c-border);
  border-radius: var(--radius-sm);
  color: var(--c-ink);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
}

.issue-name {
  color: var(--c-ink);
  font-size: 0.9375rem;
  font-weight: 600;
  line-height: 1.4;
}

.issue-line {
  display: inline-block;
  padding: 2px 8px;
  border-radius: var(--radius-sm);
  background-color: #F3F4F6;
  color: var(--c-muted);
  font-size: 0.75rem;
  font-weight: 600;
}

.issue-line--blue {
  background-color: #EFF6FF;
  color: var(--c-line-blue);
}

.issue-line--green {
  background-color: #ECFDF5;
  color: var(--c-line-green);
}

.issue-line--orange {
  background-color: #FFF7ED;
  color: var(--c-line-orange);
}

.issue-line--purple {
  background-color: #F5F3FF;
  color: var(--c-line-purple);
}

/* 决策树分支 */

.decision-tree {
  margin-top: 36px;
}

.branch {
  padding: 18px 20px;
  background-color: var(--c-surface);
  border: 1px solid var(--c-border-soft);
  border-left: 4px solid var(--c-line-blue);
  border-radius: var(--radius);
}

.branch + .branch {
  margin-top: 14px;
}

.branch-title {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px;
  font-size: 1rem;
}

.branch-code {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 40px;
  padding: 2px 8px;
  border-radius: var(--radius-sm);
  background-color: var(--c-ink);
  color: #FFFFFF;
  font-size: 0.75rem;
  font-weight: 700;
}

.branch-steps {
  display: grid;
  grid-template-columns: 120px minmax(0, 1fr);
  gap: 8px 16px;
  margin-top: 14px;
  padding-top: 12px;
  border-top: 1px dashed var(--c-border);
  font-size: 0.875rem;
}

.branch-steps dt {
  color: var(--c-ink);
  font-weight: 600;
}

.branch-steps dd {
  margin: 0;
  color: var(--c-muted);
  line-height: 1.65;
}

/* 下一步说明 */

.next-steps {
  margin-top: 36px;
}

.step-list {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  margin-top: 16px;
}

.step-item {
  padding: 16px 18px;
  background-color: var(--c-surface);
  border: 1px solid var(--c-border-soft);
  border-radius: var(--radius);
}

.step-title {
  font-size: 0.9375rem;
}

.step-item > p {
  margin-top: 8px;
  color: var(--c-muted);
  font-size: 0.875rem;
  line-height: 1.65;
}

.step-link {
  font-weight: 600;
}

/* 页面配图 */

.page-media {
  margin-top: 32px;
}

.page-media img {
  aspect-ratio: 16 / 9;
}

/* ==========================================================================
   pages — 执行节点页
   ========================================================================== */

.page-process .page-title .line-code {
  margin-bottom: 6px;
}

/* 站点时间线 */

.station-timeline {
  margin-top: 8px;
}

.page-process .station-list {
  grid-template-columns: repeat(3, minmax(0, 1fr));
  margin-top: 16px;
}

.page-process .station-item {
  border-top: 3px solid var(--c-line-blue);
  padding: 18px 18px 20px;
}

.station-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 30px;
  height: 30px;
  border-radius: 50%;
  background-color: #EFF6FF;
  color: var(--c-line-blue);
  font-size: 0.8125rem;
  font-weight: 700;
}

.page-process .station-item h3 {
  margin-top: 10px;
  font-size: 1rem;
}

.station-goal,
.station-deliverable {
  margin-top: 8px;
  color: var(--c-muted);
  font-size: 0.875rem;
  line-height: 1.65;
  overflow-wrap: break-word;
  word-break: normal;
}

.page-process .section-media {
  margin-top: 32px;
}

.page-process .section-media img {
  aspect-ratio: 16 / 9;
}

/* 双方动作对照 */

.action-compare {
  margin-top: 36px;
}

.compare-columns {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px;
  margin-top: 16px;
}

.compare-col {
  padding: 18px 20px;
  background-color: var(--c-surface);
  border: 1px solid var(--c-border-soft);
  border-radius: var(--radius);
}

.compare-col:first-child {
  border-top: 3px solid var(--c-line-green);
}

.compare-col:last-child {
  border-top: 3px solid var(--c-line-orange);
}

.compare-head {
  padding-bottom: 10px;
  border-bottom: 1px solid var(--c-border-soft);
  font-size: 0.9375rem;
}

.action-list {
  margin-top: 12px;
}

.action-list .action-node {
  position: relative;
  padding-left: 40px;
  color: var(--c-text);
  font-size: 0.875rem;
  line-height: 1.65;
}

.action-list .action-node + .action-node {
  margin-top: 12px;
}

.action-list .action-node::before {
  content: attr(data-node);
  position: absolute;
  top: 1px;
  left: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 22px;
  border-radius: var(--radius-sm);
  background-color: #F3F4F6;
  color: var(--c-muted);
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  font-weight: 700;
}

/* 关键确认点 */

.confirm-points {
  margin-top: 36px;
}

.confirm-points .data-table {
  margin-top: 16px;
}

/* ==========================================================================
   pages — 交付标准页
   ========================================================================== */

.page-standards .page-title .page-code {
  margin-bottom: 6px;
}

.deliverables-table .section-intro,
.prep-table .section-intro {
  margin-bottom: 14px;
}

.deliverables-table .data-table,
.prep-table .data-table {
  margin-top: 4px;
}

.boundary-note {
  margin-top: 36px;
}

.boundary-note .media-figure {
  margin-bottom: 16px;
}

.boundary-note .media-figure img {
  aspect-ratio: 16 / 9;
}

.boundary-note > p {
  margin-top: 12px;
  color: var(--c-text);
  font-size: 0.9375rem;
  line-height: 1.75;
}

.boundary-list {
  margin-top: 14px;
}

.boundary-list li {
  position: relative;
  padding-left: 20px;
  color: var(--c-muted);
  font-size: 0.875rem;
  line-height: 1.7;
}

.boundary-list li + li {
  margin-top: 8px;
}

.boundary-list li::before {
  content: "";
  position: absolute;
  top: 11px;
  left: 0;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background-color: var(--c-alert);
}

/* 相关内容 */

.related-links {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 16px;
  margin-top: 32px;
  padding: 14px 18px;
  background-color: var(--c-surface);
  border: 1px solid var(--c-border-soft);
  border-radius: var(--radius);
}

.related-links-label {
  color: var(--c-ink);
  font-size: 0.875rem;
  font-weight: 600;
}

.related-links-item {
  font-size: 0.875rem;
  font-weight: 600;
}

/* ==========================================================================
   pages — 问题解答页
   ========================================================================== */

.page-faq .page-title .line-code {
  margin-bottom: 6px;
}

.faq-body {
  display: grid;
  gap: 32px;
}

.faq-group {
  min-width: 0;
}

.group-head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: center;
  gap: 4px 12px;
  margin-bottom: 14px;
}

.group-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: var(--radius-sm);
  background-color: var(--c-ink);
  color: #FFFFFF;
  font-size: 0.8125rem;
  font-weight: 700;
}

.group-head h2 {
  font-size: 1.125rem;
}

.group-desc {
  grid-column: 2;
  color: var(--c-muted);
  font-size: 0.875rem;
  line-height: 1.65;
}

.faq-answer p {
  color: var(--c-muted);
  font-size: 0.875rem;
  line-height: 1.7;
}

.faq-answer p + p {
  margin-top: 8px;
}

.faq-aside .aside-media {
  margin-bottom: 16px;
}

.faq-aside .aside-media img {
  aspect-ratio: 4 / 3;
}

.faq-aside .aside-boundary {
  border-left-color: var(--c-alert);
}

/* ==========================================================================
   pages — 合作洽谈页
   ========================================================================== */

.page-contact .page-title .title-line-code {
  margin-bottom: 6px;
}

/* 准备清单 */

.checklist-summary {
  margin-top: 12px;
  padding: 10px 14px;
  background-color: #FFFBEB;
  border: 1px solid #FDE68A;
  border-radius: var(--radius-sm);
  color: #92400E;
  font-size: 0.875rem;
  font-weight: 600;
  line-height: 1.6;
}

.checklist-list {
  margin-top: 16px;
}

.checklist-item {
  padding: 14px 16px;
  background-color: var(--c-surface);
  border: 1px solid var(--c-border-soft);
  border-radius: var(--radius);
}

.checklist-item + .checklist-item {
  margin-top: 10px;
}

.checklist-label {
  display: flex;
  align-items: center;
  gap: 10px;
  min-height: 44px;
  cursor: pointer;
}

.checklist-box {
  flex: none;
  width: 18px;
  height: 18px;
  accent-color: var(--c-line-blue);
}

.checklist-name {
  color: var(--c-ink);
  font-size: 0.9375rem;
  font-weight: 600;
}

.checklist-desc {
  margin-top: 6px;
  padding-left: 28px;
  color: var(--c-muted);
  font-size: 0.875rem;
  line-height: 1.65;
}

.checklist-hint {
  margin-top: 6px;
  padding-left: 28px;
  color: var(--c-alert);
  font-size: 0.8125rem;
  line-height: 1.6;
}

/* 需求信息表 */

.need-info {
  margin-top: 36px;
}

.info-table {
  width: 100%;
  margin-top: 14px;
  background-color: var(--c-surface);
  border: 1px solid var(--c-border-soft);
  border-radius: var(--radius);
  font-size: 0.875rem;
  text-align: left;
  overflow: hidden;
}

.info-table caption {
  text-align: left;
}

.info-table th,
.info-table td {
  padding: 10px 14px;
  border-bottom: 1px solid var(--c-border-soft);
  vertical-align: top;
  line-height: 1.6;
}

.info-table thead th {
  background-color: #F9FAFB;
  color: var(--c-ink);
  font-weight: 600;
  white-space: nowrap;
}

.info-table tbody tr:last-child th,
.info-table tbody tr:last-child td {
  border-bottom: 0;
}

.info-table tbody th {
  color: var(--c-ink);
  font-weight: 600;
}

.tag-priority {
  display: inline-block;
  padding: 2px 8px;
  border-radius: var(--radius-sm);
  background-color: #EFF6FF;
  color: var(--c-line-blue);
  font-size: 0.75rem;
  font-weight: 600;
}

.tag-priority.tag-mid {
  background-color: #F3F4F6;
  color: var(--c-muted);
}

/* 洽谈路径 */

.talk-path {
  margin-top: 36px;
}

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

.path-card {
  display: flex;
  flex-direction: column;
  padding: 16px 18px;
  background-color: var(--c-surface);
  border: 1px solid var(--c-border-soft);
  border-top: 3px solid var(--c-line-blue);
  border-radius: var(--radius);
}

.path-code {
  color: var(--c-line-blue);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.06em;
}

.path-card h3 {
  margin-top: 6px;
  font-size: 1rem;
}

.path-desc {
  margin-top: 8px;
  color: var(--c-muted);
  font-size: 0.875rem;
  line-height: 1.65;
}

.path-points {
  margin-top: 10px;
}

.path-points li {
  position: relative;
  padding-left: 16px;
  color: var(--c-muted);
  font-size: 0.8125rem;
  line-height: 1.65;
}

.path-points li + li {
  margin-top: 6px;
}

.path-points li::before {
  content: "";
  position: absolute;
  top: 10px;
  left: 0;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: var(--c-border);
}

.path-link {
  margin-top: auto;
  padding-top: 12px;
  font-size: 0.875rem;
  font-weight: 600;
}

/* 侧栏图片与下一步 */

.layout-aside .aside-figure {
  padding: 16px 18px;
  background-color: var(--c-surface);
  border: 1px solid var(--c-border-soft);
  border-left: 3px solid var(--c-line-purple);
  border-radius: var(--radius);
}

.layout-aside .aside-figure h2 {
  margin-bottom: 12px;
  color: var(--c-ink);
  font-size: 0.9375rem;
}

.layout-aside .aside-figure figure {
  overflow: hidden;
  border: 1px solid var(--c-border-soft);
  border-radius: var(--radius-sm);
}

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

.layout-aside .aside-figure figcaption {
  padding: 8px 10px;
  border-top: 1px solid var(--c-border-soft);
  color: var(--c-muted);
  font-size: 0.8125rem;
  line-height: 1.5;
}

.layout-aside .aside-next {
  border-left-color: var(--c-line-green);
}

/* ==========================================================================
   pages — 404
   ========================================================================== */

.site-error .site-main {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

.error-main {
  max-width: var(--shell-inner);
  margin: 0 auto;
  padding: 56px 24px;
}

.error-panel {
  padding: 32px;
  background-color: var(--c-surface);
  border: 1px solid var(--c-border-soft);
  border-left: 4px solid var(--c-line-orange);
  border-radius: var(--radius);
}

.error-code {
  color: var(--c-line-orange);
  font-family: var(--font-mono);
  font-size: 0.875rem;
  font-weight: 700;
  letter-spacing: 0.08em;
}

.site-error .error-panel h1 {
  margin-top: 8px;
  font-size: 1.75rem;
}

.error-desc {
  max-width: 60ch;
  margin-top: 12px;
  color: var(--c-muted);
  font-size: 0.9375rem;
  line-height: 1.75;
}

.error-home-link {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  margin-top: 20px;
  padding: 10px 20px;
  border-radius: var(--radius-sm);
  background-color: var(--c-line-blue);
  color: #FFFFFF;
  font-size: 0.9375rem;
  font-weight: 600;
}

.error-home-link:hover,
.error-home-link:focus-visible {
  background-color: #1D4ED8;
  text-decoration: none;
}

.error-links {
  margin-top: 32px;
}

.error-links h2 {
  font-size: 1.125rem;
}

.error-links ul {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  margin-top: 14px;
}

.error-links a {
  display: block;
  min-height: 44px;
  padding: 12px 16px;
  background-color: var(--c-surface);
  border: 1px solid var(--c-border-soft);
  border-radius: var(--radius);
  color: var(--c-ink);
  font-size: 0.9375rem;
  font-weight: 600;
  line-height: 1.4;
}

.error-links a:hover,
.error-links a:focus-visible {
  border-color: var(--c-line-blue);
  color: var(--c-line-blue);
  text-decoration: none;
}

/* ==========================================================================
   responsive — 断点 1024 / 768 / 480
   ========================================================================== */

@media (max-width: 1024px) {
  .header-inner {
    gap: 14px;
  }

  .brand-tagline {
    display: none;
  }

  .site-nav a {
    padding: 8px 10px;
    font-size: 0.875rem;
  }

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

  .page-process .station-list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .footer-inner {
    grid-template-columns: minmax(0, 1fr) minmax(0, 2fr);
    align-items: start;
  }

  .back-to-top {
    justify-self: start;
  }
}

@media (max-width: 768px) {
  h1 {
    font-size: 1.75rem;
  }

  .site-header {
    position: static;
  }

  .header-inner {
    flex-wrap: wrap;
    padding: 12px 16px;
  }

  .main-nav {
    order: 3;
    width: 100%;
    margin-left: 0;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
  }

  .site-nav ul {
    flex-wrap: nowrap;
    gap: 0;
  }

  .site-nav a {
    min-height: 44px;
    padding: 10px 12px;
    line-height: 1.6;
  }

  .home-main,
  .inner-main {
    padding-right: 16px;
    padding-left: 16px;
  }

  .home-main {
    padding-bottom: 88px;
  }

  .inner-main {
    padding-bottom: 88px;
  }

  .page-title {
    font-size: 1.75rem;
  }

  /* 首页各栏改单列 */

  .hero {
    padding: 24px 0 32px;
  }

  .hero-inner,
  .media-band-inner {
    grid-template-columns: minmax(0, 1fr);
    gap: 24px;
  }

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

  .hero-text h1 {
    font-size: 1.75rem;
  }

  .issue-grid,
  .scenario-grid,
  .prep-steps,
  .step-list,
  .path-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .lines-grid,
  .prep-list,
  .compare-columns,
  .error-links ul {
    grid-template-columns: minmax(0, 1fr);
  }

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

  .standards-layout,
  .page-layout {
    grid-template-columns: minmax(0, 1fr);
    gap: 28px;
  }

  .page-layout > * > section + section,
  .page-layout > * > figure + section,
  .page-layout > * > section + figure {
    margin-top: 28px;
  }

  .line-spec,
  .branch-steps {
    grid-template-columns: minmax(0, 1fr);
    gap: 2px 0;
  }

  .line-spec dt,
  .branch-steps dt {
    margin-top: 8px;
  }

  .line-spec dt:first-of-type,
  .branch-steps dt:first-of-type {
    margin-top: 0;
  }

  /* 表格转紧凑列表 */

  .data-table,
  .info-table,
  .compare-table table {
    min-width: 0;
    border: 0;
    border-radius: 0;
    background-color: transparent;
    font-size: 0.875rem;
  }

  .data-table thead,
  .info-table thead,
  .compare-table thead {
    position: absolute;
    width: 1px;
    height: 1px;
    overflow: hidden;
    clip: rect(0 0 0 0);
    clip-path: inset(50%);
    white-space: nowrap;
  }

  .data-table tr,
  .info-table tr,
  .compare-table tbody tr {
    display: block;
    padding: 12px 14px;
    background-color: var(--c-surface);
    border: 1px solid var(--c-border-soft);
    border-radius: var(--radius);
  }

  .data-table tr + tr,
  .info-table tr + tr,
  .compare-table tbody tr + tr {
    margin-top: 10px;
  }

  .data-table th,
  .data-table td,
  .info-table th,
  .info-table td,
  .compare-table th,
  .compare-table td {
    display: block;
    padding: 4px 0;
    border-bottom: 0;
  }

  .data-table tbody th,
  .info-table tbody th,
  .compare-table tbody th {
    font-size: 0.9375rem;
  }

  .data-table tbody td::before,
  .info-table tbody td::before,
  .compare-table tbody td::before {
    content: attr(data-label) "：";
    color: var(--c-muted);
    font-weight: 600;
  }

  /* 页脚改单列 */

  .footer-inner {
    grid-template-columns: minmax(0, 1fr);
    gap: 14px;
    padding: 20px 16px 24px;
  }

  .footer-copy {
    white-space: normal;
  }

  .back-to-top {
    justify-self: start;
  }

  /* 移动底部任务导航 */

  .mobile-bottom-nav {
    display: block;
    position: fixed;
    right: 0;
    bottom: 0;
    left: 0;
    z-index: 30;
    background-color: var(--c-surface);
    border-top: 1px solid var(--c-border);
    box-shadow: 0 -1px 4px rgba(17, 24, 39, 0.06);
  }

  .mobile-bottom-nav ul {
    display: grid;
    grid-template-columns: repeat(5, minmax(0, 1fr));
    max-width: var(--shell-inner);
    margin: 0 auto;
  }

  .mobile-bottom-nav a {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 52px;
    padding: 6px 2px;
    color: var(--c-muted);
    font-size: 0.75rem;
    line-height: 1.3;
    text-align: center;
  }

  .mobile-bottom-nav a:hover,
  .mobile-bottom-nav a:focus-visible {
    color: var(--c-line-blue);
    text-decoration: none;
  }

  .mobile-bottom-nav a.is-current {
    color: var(--c-line-blue);
    font-weight: 600;
    box-shadow: inset 0 2px 0 var(--c-line-blue);
  }
}

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

  .brand {
    font-size: 1rem;
  }

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

  .hero-text h1,
  .page-title {
    font-size: 1.625rem;
  }

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

  .error-panel {
    padding: 22px 18px;
  }

  .site-error .error-panel h1 {
    font-size: 1.5rem;
  }

  .mobile-bottom-nav a {
    font-size: 0.6875rem;
  }
}