/* ==========================================================================
   麻花天美星空无限 · 全站样式
   分组：base / layout / components / pages / responsive
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. base
   -------------------------------------------------------------------------- */

:root {
  --paper: #F5F2EC;
  --archive: #EAE5D9;
  --ink: #1B1D1A;
  --ink-soft: #3A3D38;
  --rust: #8A3A2C;
  --slate: #4A5A55;
  --line: #D8D2C4;
  --line-strong: #C3BBA8;
  --white: #FFFDF8;
  --radius: 4px;
  --wrap: 1140px;
  --read: 720px;
  --gap: 28px;
  --serif: "Noto Serif SC", "Songti SC", "SimSun", Georgia, serif;
  --sans: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", sans-serif;
  --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, "Courier New", monospace;
}

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

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

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.8;
  font-weight: 400;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

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

p {
  margin: 0;
}

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

a {
  color: var(--rust);
  text-decoration: none;
  transition: color 150ms ease, background-color 150ms ease, border-color 150ms ease;
}

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

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

figure {
  margin: 0;
}

button {
  font: inherit;
  color: inherit;
}

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

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

:focus-visible {
  outline: 2px solid var(--rust);
  outline-offset: 2px;
}

/* --------------------------------------------------------------------------
   2. layout · 全站骨架
   -------------------------------------------------------------------------- */

.site-body {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.8;
}

.site-main {
  flex: 1 1 auto;
  width: 100%;
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 0 24px 72px;
}

.inner-main {
  padding-top: 20px;
}

.home-main {
  padding-top: 0;
}

/* 内页统一宽度与阅读列 */
.content-main {
  min-width: 0;
  width: 100%;
}

/* --------------------------------------------------------------------------
   3. components · 页头与导航
   -------------------------------------------------------------------------- */

.site-header {
  width: 100%;
  background: var(--paper);
  border-bottom: 1px solid var(--line);
  position: relative;
  z-index: 40;
}

.header-top {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 18px 24px 14px;
  display: flex;
  align-items: center;
  gap: 24px;
  flex-wrap: wrap;
}

.brand-block {
  display: flex;
  flex-direction: column;
  gap: 2px;
  min-width: 0;
  flex: 0 1 auto;
}

.brand-name {
  font-family: var(--serif);
  font-size: 21px;
  font-weight: 600;
  line-height: 1.3;
  color: var(--ink);
  letter-spacing: 0.01em;
}

.brand-name:hover {
  color: var(--rust);
}

.brand-slogan {
  font-size: 13px;
  line-height: 1.5;
  color: var(--slate);
  font-family: var(--sans);
}

.site-nav {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 22px;
}

.nav-list {
  display: flex;
  align-items: center;
  gap: 20px;
  flex-wrap: wrap;
}

.nav-list li {
  list-style: none;
}

.nav-list a {
  display: inline-block;
  padding: 6px 2px;
  font-size: 15px;
  line-height: 1.6;
  color: var(--ink-soft);
  border-bottom: 1px solid transparent;
}

.nav-list a:hover {
  color: var(--rust);
  border-bottom-color: var(--rust);
}

.nav-list a.is-current {
  color: var(--rust);
  border-bottom-color: var(--rust);
}

.nav-contact-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 36px;
  padding: 6px 16px;
  font-size: 14px;
  line-height: 1.4;
  color: var(--rust);
  border: 1px solid var(--rust);
  border-radius: var(--radius);
  background: transparent;
  white-space: nowrap;
}

.nav-contact-btn:hover {
  background: var(--rust);
  color: var(--white);
}

.nav-contact-btn.is-current {
  background: var(--rust);
  color: var(--white);
}

/* 移动端汉堡按钮 */
.nav-toggle {
  display: none;
  margin-left: auto;
  width: 44px;
  height: 44px;
  padding: 0;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  background: var(--white);
  cursor: pointer;
  position: relative;
}

.nav-toggle-bar,
.nav-toggle-bar::before,
.nav-toggle-bar::after {
  position: absolute;
  left: 50%;
  width: 20px;
  height: 2px;
  background: var(--ink);
  transform: translateX(-50%);
  transition: transform 150ms ease, opacity 150ms ease;
}

.nav-toggle-bar {
  top: 50%;
  margin-top: -1px;
}

.nav-toggle-bar::before,
.nav-toggle-bar::after {
  content: "";
  left: 0;
  transform: none;
}

.nav-toggle-bar::before {
  top: -7px;
}

.nav-toggle-bar::after {
  top: 7px;
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bar {
  background: transparent;
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bar::before {
  top: 0;
  transform: rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bar::after {
  top: 0;
  transform: rotate(-45deg);
}

/* 移动端纵向菜单 */
.mobile-nav {
  display: none;
  border-top: 1px solid var(--line);
  background: var(--white);
}

.mobile-nav[hidden] {
  display: none;
}

.mobile-nav.is-open {
  display: block;
}

.mobile-nav-list {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 8px 24px 16px;
}

.mobile-nav-list li {
  border-bottom: 1px solid var(--line);
}

.mobile-nav-list li:last-child {
  border-bottom: 0;
}

.mobile-nav-list a {
  display: flex;
  align-items: center;
  min-height: 48px;
  font-size: 15px;
  color: var(--ink-soft);
}

.mobile-nav-list a:hover,
.mobile-nav-list a.is-current {
  color: var(--rust);
}

/* 页头索引摘要条 */
.header-index {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 10px 24px;
  display: flex;
  align-items: center;
  gap: 20px;
  flex-wrap: wrap;
  border-top: 1px solid var(--line);
  background: var(--archive);
  font-size: 13px;
}

.header-index-label {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--slate);
  text-transform: uppercase;
}

.header-index a {
  color: var(--ink-soft);
  font-size: 13px;
  padding: 2px 0;
  border-bottom: 1px solid transparent;
}

.header-index a:hover {
  color: var(--rust);
  border-bottom-color: var(--rust);
}

/* --------------------------------------------------------------------------
   4. components · 面包屑与页面标题
   -------------------------------------------------------------------------- */

.breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 6px;
  font-size: 13px;
  color: var(--slate);
  padding: 4px 0 0;
}

.breadcrumb a {
  color: var(--slate);
  border-bottom: 1px solid transparent;
}

.breadcrumb a:hover {
  color: var(--rust);
  border-bottom-color: var(--rust);
}

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

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

.page-header {
  padding: 14px 0 22px;
  border-bottom: 1px solid var(--line);
  margin-bottom: 32px;
}

.page-title {
  font-family: var(--serif);
  font-size: 28px;
  font-weight: 600;
  line-height: 1.35;
  color: var(--ink);
  letter-spacing: 0;
}

/* --------------------------------------------------------------------------
   5. components · 通用按钮 / 索引编号 / 区块标题
   -------------------------------------------------------------------------- */

.btn-primary,
.btn-ghost {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 10px 22px;
  font-size: 15px;
  line-height: 1.4;
  border-radius: var(--radius);
  border: 1px solid var(--rust);
  font-family: var(--sans);
}

.btn-primary {
  background: var(--rust);
  color: var(--white);
}

.btn-primary:hover {
  background: #6E2C21;
  border-color: #6E2C21;
  color: var(--white);
}

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

.btn-ghost:hover {
  background: var(--archive);
  color: var(--rust);
}

.index-num,
.row-num,
.step-num,
.group-num,
.record-num,
.flow-num,
.standard-no,
.rule-no,
.record-no,
.stage-no,
.page-index,
.page-index-label,
.page-index-no,
.next-entry-num,
.anchor-item {
  font-family: var(--mono);
  letter-spacing: 0.08em;
  font-size: 13px;
  color: var(--rust);
}

.section-head {
  margin-bottom: 26px;
}

.section-head h2,
.section-title,
.section-block h2,
.page-title-section h2 {
  font-family: var(--serif);
  font-size: 22px;
  font-weight: 600;
  line-height: 1.4;
  color: var(--ink);
  margin-bottom: 8px;
}

.section-head p,
.section-desc,
.section-intro,
.section-lead,
.faq-group-intro {
  font-size: 15px;
  line-height: 1.8;
  color: var(--slate);
  max-width: 68ch;
}

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

.section-more a {
  color: var(--rust);
  border-bottom: 1px solid var(--line-strong);
  padding-bottom: 1px;
}

.section-more a:hover {
  border-bottom-color: var(--rust);
}

/* --------------------------------------------------------------------------
   6. components · 页脚
   -------------------------------------------------------------------------- */

.site-footer {
  width: 100%;
  background: var(--archive);
  border-top: 1px solid var(--line);
  margin-top: auto;
}

.footer-grid {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 44px 24px 32px;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 32px;
}

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

.footer-title {
  font-family: var(--serif);
  font-size: 15px;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 12px;
  letter-spacing: 0.02em;
}

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

.footer-links a {
  font-size: 14px;
  line-height: 1.7;
  color: var(--ink-soft);
  border-bottom: 1px solid transparent;
  padding-bottom: 1px;
}

.footer-links a:hover {
  color: var(--rust);
  border-bottom-color: var(--rust);
}

.footer-text {
  font-size: 13px;
  line-height: 1.8;
  color: var(--slate);
  margin: 0 0 8px;
}

.footer-anchor {
  display: inline-block;
  font-size: 13px;
  color: var(--rust);
  border-bottom: 1px dashed var(--line-strong);
  margin-top: 4px;
}

.footer-anchor:hover {
  border-bottom-style: solid;
  border-bottom-color: var(--rust);
}

.footer-bottom {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 16px 24px 26px;
  border-top: 1px solid var(--line-strong);
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}

.footer-brand {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--slate);
}

.footer-copy {
  font-size: 12px;
  color: var(--slate);
}

/* --------------------------------------------------------------------------
   7. pages · 首页
   -------------------------------------------------------------------------- */

/* 首屏索引区 */
.hero-index {
  border-bottom: 1px solid var(--line);
  padding: 40px 0 0;
  margin: 0 -24px;
  padding-left: 24px;
  padding-right: 24px;
}

.hero-inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 460px);
  gap: 44px;
  align-items: center;
  padding-bottom: 36px;
}

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

.hero-eyebrow {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--rust);
  text-transform: uppercase;
  margin-bottom: 14px;
}

.hero-text h1 {
  font-family: var(--serif);
  font-size: 34px;
  font-weight: 600;
  line-height: 1.32;
  color: var(--ink);
  letter-spacing: 0;
  margin-bottom: 16px;
}

.hero-lead {
  font-size: 16px;
  line-height: 1.85;
  color: var(--ink-soft);
  max-width: 46ch;
  margin-bottom: 24px;
}

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

.hero-media {
  min-width: 0;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--white);
}

.hero-media img {
  display: block;
  width: 100%;
  height: 320px;
  object-fit: cover;
  filter: saturate(0.88) contrast(1.02);
}

/* 三条索引 */
.hero-index-strip {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  border-top: 1px solid var(--line);
  margin: 0 -24px;
}

.index-item {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 18px 22px;
  border-right: 1px solid var(--line);
  color: var(--ink);
  background: transparent;
  min-width: 0;
}

.index-item:last-child {
  border-right: 0;
}

.index-item:hover {
  background: var(--archive);
  color: var(--ink);
}

.index-item .index-num {
  color: var(--rust);
  font-size: 12px;
}

.index-name {
  font-family: var(--serif);
  font-size: 16px;
  font-weight: 600;
  line-height: 1.4;
  color: var(--ink);
}

.index-desc {
  font-size: 13px;
  line-height: 1.7;
  color: var(--slate);
}

/* 通用区块 */
.section {
  padding: 48px 0;
  border-bottom: 1px solid var(--line);
}

.section:last-of-type {
  border-bottom: 0;
}

/* 服务方向索引列表 */
.index-list {
  border-top: 1px solid var(--line);
}

.index-row {
  display: grid;
  grid-template-columns: 60px minmax(0, 1fr) 150px;
  gap: 20px;
  align-items: start;
  padding: 20px 12px;
  border-bottom: 1px solid var(--line);
  transition: background-color 150ms ease;
}

.index-row:hover {
  background: var(--archive);
}

.index-row:hover .row-num {
  color: var(--rust);
}

.row-num {
  font-size: 13px;
  padding-top: 3px;
  color: var(--slate);
}

.row-body {
  min-width: 0;
}

.row-title {
  font-family: var(--serif);
  font-size: 18px;
  font-weight: 600;
  line-height: 1.4;
  margin-bottom: 6px;
}

.row-title a {
  color: var(--ink);
}

.row-title a:hover {
  color: var(--rust);
}

.row-desc {
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink-soft);
}

.row-tag {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--slate);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  padding: 3px 8px;
  text-align: center;
  justify-self: end;
  line-height: 1.6;
  align-self: start;
  margin-top: 3px;
}

/* 合作流程四步 */
.flow-steps {
  display: flex;
  flex-direction: column;
  gap: 0;
  border-left: 2px solid var(--line-strong);
  margin-left: 10px;
  padding-left: 26px;
}

.flow-step {
  position: relative;
  padding: 0 0 28px;
  display: grid;
  grid-template-columns: 52px minmax(0, 1fr);
  gap: 16px;
}

.flow-step:last-child {
  padding-bottom: 0;
}

.flow-step::before {
  content: "";
  position: absolute;
  left: -33px;
  top: 6px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--paper);
  border: 2px solid var(--rust);
}

.step-num {
  font-size: 13px;
  color: var(--rust);
  padding-top: 2px;
}

.step-body {
  min-width: 0;
}

.step-name {
  font-family: var(--serif);
  font-size: 18px;
  font-weight: 600;
  line-height: 1.4;
  margin-bottom: 6px;
}

.step-desc {
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink-soft);
  margin-bottom: 6px;
}

.step-output {
  font-size: 13px;
  line-height: 1.7;
  color: var(--slate);
  font-family: var(--mono);
  letter-spacing: 0.01em;
}

/* 交付标准与限制 */
.standard-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 32px;
  align-items: start;
}

.standard-conclusion {
  border-left: 3px solid var(--rust);
  padding: 4px 0 4px 18px;
}

.conclusion-label {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--rust);
  margin-bottom: 8px;
}

.conclusion-text {
  font-family: var(--serif);
  font-size: 17px;
  line-height: 1.75;
  color: var(--ink);
}

.standard-side {
  display: flex;
  flex-direction: column;
  gap: 20px;
  min-width: 0;
}

.basis-box,
.limits-box {
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  padding: 18px 20px;
  background: var(--white);
}

.box-title {
  font-family: var(--serif);
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 10px;
  color: var(--ink);
}

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

.basis-list li {
  position: relative;
  padding-left: 18px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--ink-soft);
}

.basis-list li::before {
  content: "—";
  position: absolute;
  left: 0;
  color: var(--rust);
  font-family: var(--mono);
}

.limits-tag {
  display: inline-block;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--rust);
  border: 1px solid var(--rust);
  border-radius: var(--radius);
  padding: 2px 8px;
  margin-bottom: 12px;
}

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

.limits-list li {
  font-size: 14px;
  line-height: 1.75;
  color: var(--ink-soft);
  padding-left: 16px;
  position: relative;
}

.limits-list li::before {
  content: "·";
  position: absolute;
  left: 4px;
  color: var(--slate);
  font-weight: 700;
}

/* 执行档案摘要 */
.archive-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 340px);
  gap: 32px;
  align-items: start;
}

.archive-groups {
  display: flex;
  flex-direction: column;
  gap: 22px;
  min-width: 0;
}

.archive-group {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--white);
  padding: 16px 18px;
}

.group-title {
  display: flex;
  align-items: baseline;
  gap: 10px;
  font-family: var(--serif);
  font-size: 16px;
  font-weight: 600;
  color: var(--ink);
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line);
  margin-bottom: 10px;
}

.group-num {
  font-size: 12px;
  color: var(--rust);
}

.record-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.record-item {
  display: grid;
  grid-template-columns: 46px minmax(0, 1fr);
  gap: 10px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--ink-soft);
}

.record-num {
  font-size: 12px;
  color: var(--slate);
  padding-top: 1px;
}

.archive-media {
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--white);
  min-width: 0;
}

.archive-media img {
  display: block;
  width: 100%;
  height: 260px;
  object-fit: cover;
  filter: saturate(0.85);
}

.archive-media figcaption {
  font-size: 12px;
  line-height: 1.7;
  color: var(--slate);
  padding: 10px 14px;
  border-top: 1px solid var(--line);
}

/* 常见问题摘要 */
.faq-list {
  border-top: 1px solid var(--line);
}

.faq-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  grid-template-areas:
    "q link"
    "a link";
  gap: 4px 20px;
  padding: 18px 12px;
  border-bottom: 1px solid var(--line);
  transition: background-color 150ms ease;
}

.faq-row:hover {
  background: var(--archive);
}

.faq-question {
  grid-area: q;
  font-family: var(--serif);
  font-size: 16px;
  font-weight: 600;
  line-height: 1.5;
  color: var(--ink);
}

.faq-answer {
  grid-area: a;
  font-size: 14px;
  line-height: 1.8;
  color: var(--ink-soft);
}

.faq-link {
  grid-area: link;
  align-self: center;
  font-size: 13px;
  color: var(--rust);
  border-bottom: 1px solid var(--line-strong);
  padding-bottom: 1px;
  white-space: nowrap;
}

.faq-link:hover {
  border-bottom-color: var(--rust);
}

/* 对接说明入口 */
.contact-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 36px;
  align-items: start;
}

.contact-text {
  min-width: 0;
}

.contact-text h2 {
  font-family: var(--serif);
  font-size: 22px;
  font-weight: 600;
  line-height: 1.4;
  margin-bottom: 10px;
}

.contact-text p {
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink-soft);
  max-width: 46ch;
}

.contact-steps {
  display: flex;
  flex-direction: column;
  gap: 14px;
  min-width: 0;
}

.contact-step {
  display: grid;
  grid-template-columns: 40px minmax(0, 1fr);
  gap: 12px;
  align-items: start;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--white);
  padding: 14px 16px;
}

.contact-step .step-num {
  font-size: 12px;
  color: var(--rust);
  padding-top: 2px;
}

.contact-step p {
  font-size: 14px;
  line-height: 1.8;
  color: var(--ink-soft);
}

.contact-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 4px;
}

.contact-links a {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 8px 18px;
  font-size: 14px;
  border: 1px solid var(--rust);
  border-radius: var(--radius);
  color: var(--rust);
  background: transparent;
}

.contact-links a:hover {
  background: var(--rust);
  color: var(--white);
}

/* --------------------------------------------------------------------------
   8. pages · 内页通用
   -------------------------------------------------------------------------- */

.page-intro,
.page-title,
.page-title-section,
.page-title-block,
.page-hero {
  padding: 6px 0 0;
}

.page-lead {
  font-size: 15px;
  line-height: 1.85;
  color: var(--ink-soft);
  max-width: 68ch;
  margin-top: 8px;
}

.page-index,
.page-index-label,
.page-index-no {
  display: inline-block;
  font-size: 12px;
  color: var(--rust);
  margin-bottom: 6px;
}

/* 内页布局：左右栏 */
.page-layout {
  display: grid;
  gap: 36px;
  align-items: start;
  margin-top: 28px;
}

.page-layout.sidebar-left {
  grid-template-columns: 260px minmax(0, 1fr);
}

.page-layout.layout-main-aside {
  grid-template-columns: minmax(0, 1fr) 300px;
}

/* 侧栏 */
.sidebar {
  min-width: 0;
  position: sticky;
  top: 20px;
}

.sidebar-block {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--white);
  padding: 16px 18px;
  margin-bottom: 18px;
}

.sidebar-title {
  font-family: var(--serif);
  font-size: 15px;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 10px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--line);
}

.sidebar .index-list {
  border-top: 0;
}

.sidebar .index-list li {
  border-bottom: 1px solid var(--line);
}

.sidebar .index-list li:last-child {
  border-bottom: 0;
}

.sidebar .index-list a {
  display: flex;
  align-items: baseline;
  gap: 8px;
  padding: 8px 0;
  font-size: 14px;
  line-height: 1.6;
  color: var(--ink-soft);
  min-height: 40px;
}

.sidebar .index-list a:hover {
  color: var(--rust);
}

.sidebar .index-num {
  font-size: 12px;
  color: var(--rust);
}

.sidebar .index-name {
  font-family: var(--sans);
  font-size: 14px;
  font-weight: 400;
  color: inherit;
}

.sidebar .index-count {
  margin-left: auto;
  font-family: var(--mono);
  font-size: 12px;
  color: var(--slate);
}

.sidebar-text {
  font-size: 13px;
  line-height: 1.8;
  color: var(--slate);
  margin-bottom: 10px;
}

.link-arrow {
  display: inline-flex;
  align-items: center;
  min-height: 40px;
  font-size: 14px;
  color: var(--rust);
  border-bottom: 1px solid var(--line-strong);
}

.link-arrow:hover {
  border-bottom-color: var(--rust);
}

/* 右侧注解栏 */
.content-aside {
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.aside-block {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--white);
  padding: 16px 18px;
}

.aside-title {
  font-family: var(--serif);
  font-size: 15px;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 8px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--line);
}

.aside-text {
  font-size: 13px;
  line-height: 1.8;
  color: var(--ink-soft);
}

.aside-links {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.aside-links a {
  font-size: 14px;
  line-height: 1.7;
  color: var(--rust);
  border-bottom: 1px solid transparent;
  padding-bottom: 1px;
}

.aside-links a:hover {
  border-bottom-color: var(--rust);
}

/* 内页配图 */
.content-figure,
.media-figure,
.coop-figure,
.faq-figure,
.contact-figure,
.split-figure {
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--white);
  min-width: 0;
  margin: 22px 0;
}

.content-figure img,
.media-figure img,
.coop-figure img,
.faq-figure img,
.contact-figure img,
.split-figure img {
  display: block;
  width: 100%;
  height: 280px;
  object-fit: cover;
  filter: saturate(0.88);
}

.content-figure figcaption,
.media-figure figcaption,
.coop-figure figcaption,
.faq-figure figcaption,
.contact-figure figcaption,
.split-figure figcaption {
  font-size: 12px;
  line-height: 1.7;
  color: var(--slate);
  padding: 10px 14px;
  border-top: 1px solid var(--line);
}

/* 内页区块 */
.section-block {
  padding: 30px 0;
  border-bottom: 1px solid var(--line);
}

.section-block:last-of-type {
  border-bottom: 0;
}

.section-block h2 {
  font-family: var(--serif);
  font-size: 22px;
  font-weight: 600;
  line-height: 1.4;
  color: var(--ink);
  margin-bottom: 10px;
}

.section-block p {
  font-size: 15px;
  line-height: 1.85;
  color: var(--ink-soft);
}

/* 锚点条 */
.anchor-bar {
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  margin: 24px 0 0;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.anchor-list {
  display: flex;
  gap: 4px;
  min-width: max-content;
  padding: 0 2px;
}

.anchor-list li {
  list-style: none;
}

.anchor-item {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 8px 14px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--slate);
  border-bottom: 2px solid transparent;
  white-space: nowrap;
}

.anchor-item:hover {
  color: var(--rust);
}

.anchor-item.is-current {
  color: var(--rust);
  border-bottom-color: var(--rust);
}

/* 表格 */
.table-wrap,
.table-scroll {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--white);
  margin-top: 16px;
}

.archive-table,
.field-table {
  width: 100%;
  min-width: 520px;
  font-size: 14px;
  line-height: 1.7;
}

.table-caption {
  caption-side: top;
  text-align: left;
  font-size: 13px;
  color: var(--slate);
  padding: 10px 14px;
  border-bottom: 1px solid var(--line);
}

.archive-table th,
.archive-table td,
.field-table th,
.field-table td {
  padding: 12px 14px;
  text-align: left;
  vertical-align: top;
  border-bottom: 1px solid var(--line);
  color: var(--ink-soft);
}

.archive-table thead th,
.field-table thead th {
  font-family: var(--serif);
  font-size: 14px;
  font-weight: 600;
  color: var(--ink);
  background: var(--archive);
  border-bottom: 1px solid var(--line-strong);
}

.field-table tbody th {
  font-weight: 600;
  color: var(--ink);
  font-family: var(--mono);
  font-size: 13px;
  letter-spacing: 0.02em;
  white-space: nowrap;
  background: transparent;
}

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

/* 资料清单 / 准备列表 */
.prep-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-top: 14px;
}

.prep-list li {
  border-left: 2px solid var(--line-strong);
  padding: 4px 0 4px 14px;
  min-width: 0;
}

.prep-name {
  display: block;
  font-family: var(--serif);
  font-size: 16px;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 4px;
}

.prep-list p,
.prep-desc {
  font-size: 14px;
  line-height: 1.8;
  color: var(--ink-soft);
}

/* 尾部链接组 */
.section-tail {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 18px;
  margin-top: 20px;
  font-size: 14px;
}

.section-tail a {
  color: var(--rust);
  border-bottom: 1px solid var(--line-strong);
  padding-bottom: 1px;
}

.section-tail a:hover {
  border-bottom-color: var(--rust);
}

/* --------------------------------------------------------------------------
   9. pages · services.html
   -------------------------------------------------------------------------- */

.direction-group {
  padding-top: 8px;
}

.direction-item {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--white);
  padding: 20px 22px;
  margin-bottom: 18px;
}

.direction-name {
  display: flex;
  align-items: baseline;
  gap: 10px;
  font-family: var(--serif);
  font-size: 18px;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 14px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line);
}

.direction-name .index-num {
  font-size: 12px;
  color: var(--rust);
}

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

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

.col-label {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--slate);
  margin-bottom: 6px;
}

.direction-col p {
  font-size: 14px;
  line-height: 1.8;
  color: var(--ink-soft);
}

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

.direction-col li {
  position: relative;
  padding-left: 14px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--ink-soft);
}

.direction-col li::before {
  content: "·";
  position: absolute;
  left: 2px;
  color: var(--rust);
  font-weight: 700;
}

/* 适配判断表 */
.match-table-section {
  padding-top: 30px;
}

/* 资料准备 */
.prep-section .prep-list {
  margin-top: 18px;
}

/* --------------------------------------------------------------------------
   10. pages · delivery-records.html
   -------------------------------------------------------------------------- */

.section-block#archive-rules {
  padding-top: 30px;
}

.rule-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-top: 14px;
  counter-reset: rule;
}

.rule-list li {
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr);
  gap: 12px;
  align-items: baseline;
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink-soft);
}

.rule-no {
  font-size: 12px;
  color: var(--rust);
}

/* 阶段分组记录条目 */
.stage-group {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--white);
  margin-bottom: 18px;
  overflow: hidden;
}

.stage-head {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 12px 16px;
  background: var(--archive);
  border-bottom: 1px solid var(--line);
}

.stage-no {
  font-size: 12px;
  color: var(--rust);
}

.stage-name {
  font-family: var(--serif);
  font-size: 15px;
  font-weight: 600;
  color: var(--ink);
}

.stage-count {
  margin-left: auto;
  font-family: var(--mono);
  font-size: 12px;
  color: var(--slate);
}

.stage-group .record-list {
  padding: 12px 16px;
}

.stage-group .record-item {
  display: grid;
  grid-template-columns: 56px minmax(0, 1fr);
  gap: 12px;
  padding: 10px 0;
  border-bottom: 1px solid var(--line);
}

.stage-group .record-item:last-child {
  border-bottom: 0;
}

.record-no {
  font-size: 12px;
  color: var(--slate);
  padding-top: 2px;
}

.record-action {
  font-size: 14px;
  line-height: 1.75;
  color: var(--ink);
  margin-bottom: 4px;
}

.record-output {
  font-size: 13px;
  line-height: 1.7;
  color: var(--slate);
  margin-bottom: 6px;
}

.record-tag {
  display: inline-block;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.04em;
  color: var(--rust);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  padding: 1px 7px;
}

/* 查阅与留存 */
.split-block {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 380px);
  gap: 32px;
  align-items: start;
}

.split-text {
  min-width: 0;
}

.split-text p {
  margin-bottom: 10px;
}

.split-link {
  font-size: 14px;
  margin-top: 6px;
}

.split-link a {
  color: var(--rust);
  border-bottom: 1px solid var(--line-strong);
  padding-bottom: 1px;
}

.split-link a:hover {
  border-bottom-color: var(--rust);
}

.split-figure {
  margin: 0;
}

/* 相关条目 */
.related-block {
  padding-top: 26px;
}

.related-list {
  display: flex;
  flex-direction: column;
  gap: 0;
  border-top: 1px solid var(--line);
  margin-top: 14px;
}

.related-list li {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 6px 14px;
  padding: 12px 0;
  border-bottom: 1px solid var(--line);
}

.related-list a {
  font-size: 15px;
  color: var(--rust);
  border-bottom: 1px solid transparent;
}

.related-list a:hover {
  border-bottom-color: var(--rust);
}

.related-note {
  font-size: 13px;
  color: var(--slate);
}

/* --------------------------------------------------------------------------
   11. pages · method.html
   -------------------------------------------------------------------------- */

.section-conclusion,
.section-standards,
.section-basis,
.section-limits {
  padding: 26px 0;
  border-bottom: 1px solid var(--line);
}

.section-conclusion h2,
.section-standards h2,
.section-basis h2,
.section-limits h2 {
  font-family: var(--serif);
  font-size: 22px;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 10px;
}

.conclusion-box {
  border-left: 3px solid var(--rust);
  background: var(--white);
  border-radius: 0 var(--radius) var(--radius) 0;
  padding: 16px 20px;
  margin-top: 12px;
}

.conclusion-lead {
  font-family: var(--serif);
  font-size: 17px;
  line-height: 1.75;
  color: var(--ink);
  margin-bottom: 10px;
}

.conclusion-box p {
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink-soft);
  margin-bottom: 8px;
}

.conclusion-box p:last-child {
  margin-bottom: 0;
}

.standard-list {
  display: flex;
  flex-direction: column;
  gap: 0;
  border-top: 1px solid var(--line);
  margin-top: 14px;
}

.standard-item {
  display: grid;
  grid-template-columns: 52px minmax(0, 1fr);
  gap: 14px;
  padding: 16px 0;
  border-bottom: 1px solid var(--line);
}

.standard-no {
  font-size: 12px;
  color: var(--rust);
  padding-top: 3px;
}

.standard-body {
  min-width: 0;
}

.standard-body h3 {
  font-family: var(--serif);
  font-size: 16px;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 4px;
}

.standard-body p {
  font-size: 14px;
  line-height: 1.8;
  color: var(--ink-soft);
  margin-bottom: 6px;
}

.standard-meta {
  display: inline-block;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.04em;
  color: var(--slate);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  padding: 1px 7px;
}

.section-basis .media-figure {
  margin: 16px 0;
}

.section-basis .basis-list {
  margin-top: 14px;
  gap: 12px;
}

.section-basis .basis-list li {
  display: grid;
  grid-template-columns: 22px minmax(0, 1fr);
  gap: 8px;
  padding-left: 0;
  font-size: 15px;
  line-height: 1.8;
}

.section-basis .basis-list li::before {
  content: none;
}

.basis-mark {
  font-family: var(--mono);
  font-size: 13px;
  color: var(--rust);
  line-height: 1.9;
}

.section-note {
  margin-top: 16px;
  font-size: 14px;
}

.section-note a {
  color: var(--rust);
  border-bottom: 1px solid var(--line-strong);
  padding-bottom: 1px;
}

.section-note a:hover {
  border-bottom-color: var(--rust);
}

.limit-box {
  border: 1px solid var(--rust);
  border-radius: var(--radius);
  background: var(--white);
  padding: 16px 20px;
  margin-top: 14px;
}

.limit-label {
  display: inline-block;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--white);
  background: var(--rust);
  border-radius: var(--radius);
  padding: 2px 8px;
  margin-bottom: 12px;
}

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

.limit-list li {
  position: relative;
  padding-left: 16px;
  font-size: 14px;
  line-height: 1.8;
  color: var(--ink-soft);
}

.limit-list li::before {
  content: "×";
  position: absolute;
  left: 0;
  color: var(--rust);
  font-family: var(--mono);
  font-size: 12px;
  top: 2px;
}

/* --------------------------------------------------------------------------
   12. pages · cooperation.html
   -------------------------------------------------------------------------- */

.coop-flow {
  padding: 26px 0 30px;
  border-bottom: 1px solid var(--line);
}

.coop-flow h2,
.coop-checklist h2,
.coop-deviation h2,
.coop-next h2,
.coop-related h2 {
  font-family: var(--serif);
  font-size: 22px;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 8px;
}

.coop-flow .flow-steps {
  margin-top: 22px;
}

.flow-body {
  min-width: 0;
}

.flow-body h3 {
  font-family: var(--serif);
  font-size: 18px;
  font-weight: 600;
  line-height: 1.4;
  color: var(--ink);
  margin-bottom: 6px;
}

.flow-body p {
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink-soft);
  margin-bottom: 6px;
}

.flow-output {
  font-size: 13px;
  line-height: 1.7;
  color: var(--slate);
  font-family: var(--mono);
}

.flow-ref {
  font-size: 13px;
  line-height: 1.7;
  color: var(--slate);
  margin-top: 4px;
}

.coop-two-col {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 32px;
  padding: 30px 0;
  border-bottom: 1px solid var(--line);
  align-items: start;
}

.coop-checklist,
.coop-deviation {
  min-width: 0;
}

.checklist {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-top: 16px;
}

.checklist-item {
  display: grid;
  grid-template-columns: 22px minmax(0, 1fr);
  gap: 10px;
  align-items: start;
  font-size: 14px;
  line-height: 1.8;
  color: var(--ink-soft);
}

.check-box {
  width: 16px;
  height: 16px;
  margin-top: 4px;
  border: 1px solid var(--line-strong);
  border-radius: 2px;
  background: var(--white);
  position: relative;
}

.check-box::after {
  content: "";
  position: absolute;
  left: 3px;
  top: 5px;
  width: 8px;
  height: 4px;
  border-left: 1.5px solid var(--rust);
  border-bottom: 1.5px solid var(--rust);
  transform: rotate(-45deg);
}

.deviation-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-top: 16px;
}

.deviation-item {
  border-left: 2px solid var(--rust);
  padding: 2px 0 2px 14px;
}

.deviation-item h3 {
  font-family: var(--serif);
  font-size: 15px;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 4px;
}

.deviation-item p {
  font-size: 14px;
  line-height: 1.8;
  color: var(--ink-soft);
}

.coop-figure {
  margin: 30px 0;
}

.coop-next {
  padding: 30px 0;
  border-bottom: 1px solid var(--line);
}

.next-entry-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
  margin-top: 18px;
}

.next-entry {
  display: grid;
  grid-template-columns: 40px minmax(0, 1fr);
  grid-template-areas:
    "num name"
    "num desc";
  gap: 2px 12px;
  align-items: start;
  padding: 16px 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--white);
  color: var(--ink);
}

.next-entry:hover {
  background: var(--archive);
  border-color: var(--line-strong);
  color: var(--ink);
}

.next-entry-num {
  grid-area: num;
  font-size: 12px;
  color: var(--rust);
  padding-top: 2px;
}

.next-entry-name {
  grid-area: name;
  font-family: var(--serif);
  font-size: 16px;
  font-weight: 600;
  color: var(--ink);
}

.next-entry-desc {
  grid-area: desc;
  font-size: 13px;
  line-height: 1.7;
  color: var(--slate);
}

.coop-related {
  padding: 26px 0 0;
}

.related-links {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 22px;
  margin-top: 14px;
}

.related-links a {
  font-size: 14px;
  color: var(--rust);
  border-bottom: 1px solid var(--line-strong);
  padding-bottom: 1px;
}

.related-links a:hover {
  border-bottom-color: var(--rust);
}

/* --------------------------------------------------------------------------
   13. pages · faq.html
   -------------------------------------------------------------------------- */

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

.faq-group h2 {
  font-family: var(--serif);
  font-size: 22px;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 8px;
}

.faq-group-intro {
  margin-bottom: 16px;
}

.faq-item {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--white);
  margin-bottom: 10px;
  overflow: hidden;
}

.faq-item summary {
  list-style: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  padding: 14px 18px;
  min-height: 48px;
  font-family: var(--serif);
  font-size: 16px;
  font-weight: 600;
  line-height: 1.5;
  color: var(--ink);
}

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

.faq-item summary::after {
  content: "+";
  flex: 0 0 auto;
  font-family: var(--mono);
  font-size: 18px;
  line-height: 1;
  color: var(--rust);
  transition: transform 150ms ease;
}

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

.faq-item summary:hover {
  background: var(--archive);
}

.faq-item .faq-answer {
  padding: 0 18px 16px;
  border-top: 1px solid var(--line);
  padding-top: 12px;
}

.faq-item .faq-answer p {
  font-size: 14px;
  line-height: 1.85;
  color: var(--ink-soft);
  margin-bottom: 8px;
}

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

.faq-link-line a {
  font-size: 13px;
  color: var(--rust);
  border-bottom: 1px solid var(--line-strong);
  padding-bottom: 1px;
}

.faq-link-line a:hover {
  border-bottom-color: var(--rust);
}

.faq-figure {
  margin: 24px 0 0;
}

.faq-figure img {
  height: 240px;
}

.page-guide-list {
  display: flex;
  flex-direction: column;
  gap: 0;
  border-top: 1px solid var(--line);
  margin-top: 16px;
}

.page-guide-item {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 6px 14px;
  padding: 12px 0;
  border-bottom: 1px solid var(--line);
}

.page-guide-item a {
  font-size: 15px;
  color: var(--rust);
  border-bottom: 1px solid transparent;
}

.page-guide-item a:hover {
  border-bottom-color: var(--rust);
}

.page-guide-desc {
  font-size: 13px;
  color: var(--slate);
}

/* --------------------------------------------------------------------------
   14. pages · contact.html
   -------------------------------------------------------------------------- */

.contact-method {
  padding: 26px 0;
  border-bottom: 1px solid var(--line);
}

.contact-method h2,
.contact-info h2,
.contact-guide h2 {
  font-family: var(--serif);
  font-size: 22px;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 10px;
}

.contact-method-body p {
  font-size: 15px;
  line-height: 1.85;
  color: var(--ink-soft);
  margin-bottom: 10px;
  max-width: 68ch;
}

.contact-method-body p:last-child {
  margin-bottom: 0;
}

.contact-method .contact-figure {
  margin: 22px 0 0;
}

.contact-info {
  padding: 26px 0;
  border-bottom: 1px solid var(--line);
}

.contact-info-columns {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 28px;
  margin-top: 16px;
  align-items: start;
}

.contact-info-col {
  min-width: 0;
}

.contact-info-col h3 {
  font-family: var(--serif);
  font-size: 16px;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 10px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--line);
}

.contact-info-col .prep-list {
  margin-top: 0;
}

.contact-info-col .prep-list li {
  border-left: 0;
  padding: 0;
}

.prep-name {
  display: block;
  font-size: 14px;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 2px;
  font-family: var(--sans);
}

.prep-desc {
  display: block;
  font-size: 13px;
  line-height: 1.8;
  color: var(--slate);
}

.contact-guide {
  padding: 26px 0 0;
}

.contact-guide > p {
  font-size: 15px;
  line-height: 1.85;
  color: var(--ink-soft);
  max-width: 68ch;
}

.guide-links {
  display: flex;
  flex-direction: column;
  gap: 0;
  border-top: 1px solid var(--line);
  margin-top: 16px;
}

.guide-links li {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 6px 14px;
  padding: 12px 0;
  border-bottom: 1px solid var(--line);
}

.guide-links a {
  font-size: 15px;
  color: var(--rust);
  border-bottom: 1px solid transparent;
}

.guide-links a:hover {
  border-bottom-color: var(--rust);
}

.guide-desc {
  font-size: 13px;
  color: var(--slate);
}

/* --------------------------------------------------------------------------
   15. pages · 404.html
   -------------------------------------------------------------------------- */

.error-main {
  padding-top: 40px;
}

.error-panel {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--white);
  padding: 40px 32px;
  text-align: left;
}

.error-code {
  font-family: var(--mono);
  font-size: 44px;
  line-height: 1;
  letter-spacing: 0.06em;
  color: var(--rust);
  margin-bottom: 14px;
}

.error-panel h1 {
  font-family: var(--serif);
  font-size: 26px;
  font-weight: 600;
  line-height: 1.35;
  color: var(--ink);
  margin-bottom: 12px;
}

.error-lead {
  font-size: 15px;
  line-height: 1.85;
  color: var(--ink-soft);
  max-width: 60ch;
  margin-bottom: 22px;
}

.error-home-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 10px 24px;
  font-size: 15px;
  color: var(--white);
  background: var(--rust);
  border: 1px solid var(--rust);
  border-radius: var(--radius);
}

.error-home-btn:hover {
  background: #6E2C21;
  border-color: #6E2C21;
  color: var(--white);
}

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

.error-links h2 {
  font-family: var(--serif);
  font-size: 20px;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 8px;
}

.error-links-desc {
  font-size: 14px;
  line-height: 1.8;
  color: var(--slate);
  margin-bottom: 14px;
}

.error-link-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 18px;
}

.error-link-list a {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 8px 16px;
  font-size: 14px;
  color: var(--rust);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  background: var(--white);
}

.error-link-list a:hover {
  border-color: var(--rust);
  background: var(--archive);
}

/* --------------------------------------------------------------------------
   16. responsive
   -------------------------------------------------------------------------- */

@media (max-width: 1024px) {
  .hero-inner {
    grid-template-columns: minmax(0, 1fr) minmax(0, 380px);
    gap: 32px;
  }

  .hero-media img {
    height: 280px;
  }

  .page-layout.layout-main-aside {
    grid-template-columns: minmax(0, 1fr) 260px;
    gap: 28px;
  }

  .archive-layout {
    grid-template-columns: minmax(0, 1fr) minmax(0, 300px);
  }
}

@media (max-width: 960px) {
  .header-top {
    padding: 14px 20px 12px;
  }

  .site-nav {
    display: none;
  }

  .nav-toggle {
    display: inline-block;
  }

  .site-main {
    padding: 0 20px 56px;
  }

  .header-index {
    padding: 8px 20px;
    gap: 14px;
  }

  .hero-index {
    margin: 0 -20px;
    padding-left: 20px;
    padding-right: 20px;
    padding-top: 28px;
  }

  .hero-inner {
    grid-template-columns: minmax(0, 1fr);
    gap: 24px;
    padding-bottom: 28px;
  }

  .hero-text h1 {
    font-size: 28px;
  }

  .hero-media img {
    height: 240px;
  }

  .hero-index-strip {
    margin: 0 -20px;
    grid-template-columns: minmax(0, 1fr);
  }

  .index-item {
    border-right: 0;
    border-bottom: 1px solid var(--line);
    padding: 14px 20px;
  }

  .index-item:last-child {
    border-bottom: 0;
  }

  .section {
    padding: 36px 0;
  }

  .index-row {
    grid-template-columns: 44px minmax(0, 1fr);
    grid-template-areas:
      "num body"
      "num tag";
    gap: 4px 14px;
    padding: 16px 10px;
  }

  .index-row .row-num {
    grid-area: num;
  }

  .index-row .row-body {
    grid-area: body;
  }

  .index-row .row-tag {
    grid-area: tag;
    justify-self: start;
    margin-top: 6px;
  }

  .standard-grid {
    grid-template-columns: minmax(0, 1fr);
    gap: 22px;
  }

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

  .archive-media img {
    height: 220px;
  }

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

  /* 内页布局：统一单列，主内容在前 */
  .page-layout,
  .page-layout.layout-main-aside,
  .page-layout.sidebar-left {
    grid-template-columns: minmax(0, 1fr);
    gap: 24px;
  }

  /* 侧栏在窄屏改为顶部横向锚点条 */
  .sidebar {
    position: static;
    order: -1;
  }

  .sidebar-block {
    padding: 12px 14px;
    margin-bottom: 12px;
  }

  .sidebar .index-list {
    display: flex;
    gap: 6px;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    border-top: 0;
  }

  .sidebar .index-list li {
    border-bottom: 0;
    flex: 0 0 auto;
  }

  .sidebar .index-list a {
    min-height: 44px;
    padding: 8px 12px;
    border: 1px solid var(--line-strong);
    border-radius: var(--radius);
    background: var(--paper);
    white-space: nowrap;
    gap: 6px;
  }

  .sidebar .index-list a:hover {
    background: var(--archive);
  }

  .sidebar .index-count {
    margin-left: 4px;
  }

  .direction-cols {
    grid-template-columns: minmax(0, 1fr);
    gap: 14px;
  }

  .split-block {
    grid-template-columns: minmax(0, 1fr);
    gap: 22px;
  }

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

  .contact-info-columns {
    grid-template-columns: minmax(0, 1fr);
    gap: 22px;
  }

  .footer-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 26px;
    padding: 36px 20px 26px;
  }

  .footer-bottom {
    padding: 14px 20px 22px;
  }

  .content-figure img,
  .media-figure img,
  .coop-figure img,
  .faq-figure img,
  .contact-figure img,
  .split-figure img {
    height: 240px;
  }
}

@media (max-width: 640px) {
  body {
    font-size: 15px;
  }

  .header-top {
    padding: 12px 16px 10px;
    gap: 12px;
  }

  .brand-name {
    font-size: 18px;
  }

  .brand-slogan {
    font-size: 12px;
  }

  .site-main {
    padding: 0 16px 44px;
  }

  .header-index {
    padding: 8px 16px;
    gap: 10px 14px;
    font-size: 12px;
  }

  .header-index-label {
    font-size: 11px;
  }

  .header-index a {
    font-size: 12px;
  }

  .mobile-nav-list {
    padding: 6px 16px 12px;
  }

  .hero-index {
    margin: 0 -16px;
    padding: 22px 16px 0;
  }

  .hero-text h1 {
    font-size: 24px;
    line-height: 1.36;
  }

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

  .hero-actions {
    gap: 10px;
  }

  .btn-primary,
  .btn-ghost {
    flex: 1 1 auto;
    min-height: 48px;
    padding: 10px 18px;
    font-size: 15px;
  }

  .hero-media img {
    height: 200px;
  }

  .hero-index-strip {
    margin: 0 -16px;
  }

  .index-item {
    padding: 12px 16px;
  }

  .section {
    padding: 30px 0;
  }

  .section-head h2,
  .section-title,
  .section-block h2,
  .coop-flow h2,
  .coop-checklist h2,
  .coop-deviation h2,
  .coop-next h2,
  .coop-related h2,
  .faq-group h2,
  .contact-method h2,
  .contact-info h2,
  .contact-guide h2,
  .section-conclusion h2,
  .section-standards h2,
  .section-basis h2,
  .section-limits h2 {
    font-size: 20px;
  }

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

  .page-header {
    padding: 10px 0 16px;
    margin-bottom: 22px;
  }

  .flow-steps {
    margin-left: 8px;
    padding-left: 20px;
  }

  .flow-step {
    grid-template-columns: minmax(0, 1fr);
    gap: 4px;
    padding-bottom: 22px;
  }

  .flow-step::before {
    left: -27px;
    width: 10px;
    height: 10px;
  }

  .step-num {
    font-size: 12px;
  }

  .step-name,
  .flow-body h3 {
    font-size: 16px;
  }

  .standard-conclusion {
    padding-left: 14px;
  }

  .conclusion-text {
    font-size: 16px;
  }

  .basis-box,
  .limits-box,
  .direction-item,
  .archive-group,
  .aside-block,
  .sidebar-block {
    padding: 14px 16px;
  }

  .faq-row {
    grid-template-columns: minmax(0, 1fr);
    grid-template-areas:
      "q"
      "a"
      "link";
    gap: 6px;
    padding: 14px 8px;
  }

  .faq-link {
    justify-self: start;
    margin-top: 4px;
  }

  .contact-step {
    grid-template-columns: 34px minmax(0, 1fr);
    padding: 12px 14px;
  }

  .contact-links a {
    flex: 1 1 auto;
    justify-content: center;
    min-height: 48px;
  }

  .page-lead {
    font-size: 14px;
  }

  .anchor-bar {
    margin: 18px -16px 0;
    padding: 0 16px;
  }

  .anchor-item {
    padding: 8px 10px;
    font-size: 11px;
  }

  .archive-table,
  .field-table {
    min-width: 480px;
    font-size: 13px;
  }

  .archive-table th,
  .archive-table td,
  .field-table th,
  .field-table td {
    padding: 10px 12px;
  }

  .stage-group .record-item {
    grid-template-columns: minmax(0, 1fr);
    gap: 4px;
  }

  .record-no {
    padding-top: 0;
  }

  .rule-list li {
    grid-template-columns: 34px minmax(0, 1fr);
    gap: 8px;
    font-size: 14px;
  }

  .standard-item {
    grid-template-columns: 38px minmax(0, 1fr);
    gap: 10px;
    padding: 14px 0;
  }

  .next-entry-grid {
    grid-template-columns: minmax(0, 1fr);
    gap: 12px;
  }

  .next-entry {
    grid-template-columns: 32px minmax(0, 1fr);
    padding: 14px 16px;
    min-height: 64px;
  }

  .content-figure img,
  .media-figure img,
  .coop-figure img,
  .faq-figure img,
  .contact-figure img,
  .split-figure img,
  .archive-media img {
    height: 200px;
  }

  .faq-item summary {
    padding: 12px 14px;
    font-size: 15px;
  }

  .faq-item .faq-answer {
    padding: 10px 14px 14px;
  }

  .error-main {
    padding-top: 26px;
  }

  .error-panel {
    padding: 26px 20px;
  }

  .error-code {
    font-size: 34px;
  }

  .error-panel h1 {
    font-size: 22px;
  }

  .error-link-list {
    gap: 8px;
  }

  .error-link-list a {
    flex: 1 1 auto;
    justify-content: center;
  }

  .footer-grid {
    grid-template-columns: minmax(0, 1fr);
    gap: 22px;
    padding: 30px 16px 22px;
  }

  .footer-bottom {
    padding: 12px 16px 20px;
    flex-direction: column;
    align-items: flex-start;
    gap: 4px;
  }
}

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

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

/* 程序验收反馈：移动端正文优先 */
@media (max-width: 768px) {
  .site-main :is(.page-content, .main-content, .content-main) {
    order: 1;
  }

  .site-main :is(aside, .sidebar) {
    order: 2;
  }
}