/* ==========================================================================
   光棍影 amghxuu.cn — 全站样式表
   分组：base / layout / components / pages / responsive
   ========================================================================== */

/* --------------------------------------------------------------------------
   base
   -------------------------------------------------------------------------- */

:root {
  --bg-page: #f6f7f9;
  --bg-card: #ffffff;
  --ink: #1f2733;
  --ink-soft: #6b7480;
  --line: #d8dde4;
  --brand: #2f5d8a;
  --brand-deep: #24486b;
  --accent: #c2703a;
  --container: 1120px;
  --read: 760px;
  --radius: 6px;
}

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

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

body {
  margin: 0;
  background-color: var(--bg-page);
  color: var(--ink);
  font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Source Han Sans SC",
    "Noto Sans CJK SC", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  font-size: 16px;
  line-height: 1.75;
  font-weight: 400;
}

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

p {
  margin: 0;
}

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

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

a:hover,
a:focus-visible {
  color: var(--brand-deep);
  text-decoration: underline;
}

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

figure {
  margin: 0;
}

button {
  font: inherit;
  color: inherit;
}

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

/* --------------------------------------------------------------------------
   layout — 全站骨架
   -------------------------------------------------------------------------- */

.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}

.site-body {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  background-color: var(--bg-page);
  color: var(--ink);
}

.site-main {
  flex: 1 0 auto;
  display: block;
}

.home-main {
  display: block;
}

.inner-main {
  display: block;
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px 56px;
}

/* 事实说明条 */
.fact-bar {
  background-color: var(--ink);
  color: #eef1f5;
}

.fact-bar-text {
  max-width: var(--container);
  margin: 0 auto;
  padding: 9px 24px;
  font-size: 13.5px;
  line-height: 1.6;
}

/* 页头 */
.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  background-color: var(--bg-card);
  border-bottom: 1px solid var(--line);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 14px 24px;
}

.brand {
  flex: 0 0 auto;
  font-size: 21px;
  font-weight: 700;
  color: var(--ink);
  text-decoration: none;
}

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

.site-nav {
  position: relative;
  display: flex;
  align-items: center;
}

.nav-toggle {
  display: none;
  align-items: center;
  gap: 8px;
  min-height: 44px;
  padding: 8px 12px;
  background-color: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  cursor: pointer;
}

.nav-toggle:hover {
  border-color: var(--brand);
}

.nav-toggle-icon {
  position: relative;
  display: block;
  width: 18px;
  height: 2px;
  background-color: var(--ink);
}

.nav-toggle-icon::before,
.nav-toggle-icon::after {
  content: "";
  position: absolute;
  left: 0;
  width: 18px;
  height: 2px;
  background-color: var(--ink);
}

.nav-toggle-icon::before {
  top: -6px;
}

.nav-toggle-icon::after {
  top: 6px;
}

.nav-toggle-label {
  font-size: 14px;
  font-weight: 700;
}

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

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

.nav-link {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0 12px;
  font-size: 15px;
  color: var(--ink);
  border-bottom: 2px solid transparent;
  text-decoration: none;
  white-space: nowrap;
}

.nav-link:hover,
.nav-link:focus-visible {
  color: var(--brand);
  text-decoration: none;
}

.nav-link.is-current {
  color: var(--brand);
  font-weight: 700;
  border-bottom-color: var(--brand);
}

/* 页脚 */
.site-footer {
  margin-top: auto;
  background-color: var(--bg-card);
  border-top: 1px solid var(--line);
}

.footer-grid {
  display: grid;
  grid-template-columns: minmax(240px, 1.6fr) repeat(4, minmax(140px, 1fr));
  gap: 32px 28px;
  padding-top: 44px;
  padding-bottom: 32px;
}

.footer-brand-name {
  margin-bottom: 8px;
  font-size: 18px;
  font-weight: 700;
  color: var(--ink);
}

.footer-brand-desc {
  font-size: 14px;
  line-height: 1.7;
  color: var(--ink-soft);
}

.footer-col-title {
  margin-bottom: 12px;
  font-size: 15px;
  font-weight: 700;
  color: var(--ink);
}

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

.footer-list a {
  font-size: 14px;
  color: var(--ink-soft);
  text-decoration: none;
}

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

.footer-bottom {
  border-top: 1px solid var(--line);
}

.footer-bottom-inner {
  padding-top: 16px;
  padding-bottom: 18px;
}

.footer-copyright {
  font-size: 13.5px;
  color: var(--ink-soft);
}

/* 内页通用：面包屑 + 标题区 */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 20px 0 0;
  font-size: 14px;
  color: var(--ink-soft);
}

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

.breadcrumb a:hover,
.breadcrumb a:focus-visible {
  color: var(--brand);
  text-decoration: underline;
}

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

.breadcrumb-current {
  color: var(--ink);
  font-weight: 700;
}

.page-header {
  max-width: var(--read);
  padding: 18px 0 30px;
}

.page-kicker {
  margin-bottom: 8px;
  font-size: 13.5px;
  font-weight: 700;
  color: var(--accent);
}

.page-title {
  font-size: 34px;
  font-weight: 700;
  line-height: 1.3;
  color: var(--ink);
}

.page-description,
.page-lead {
  margin-top: 14px;
  font-size: 16px;
  line-height: 1.8;
  color: var(--ink-soft);
}

/* 通用区块标题 */
.section-title {
  font-size: 24px;
  font-weight: 700;
  color: var(--ink);
}

.section-intro,
.section-lead {
  margin-top: 10px;
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--ink-soft);
}

.section-intro a {
  color: var(--brand);
}

.section {
  padding: 40px 0;
  border-top: 1px solid var(--line);
}

.section-note {
  margin-top: 24px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink-soft);
}

.section-note a {
  margin-right: 14px;
  color: var(--brand);
}

/* --------------------------------------------------------------------------
   components — 通用组件
   -------------------------------------------------------------------------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0 22px;
  font-size: 15px;
  font-weight: 700;
  border: 1px solid transparent;
  border-radius: var(--radius);
  text-decoration: none;
  transition: background-color .18s ease, border-color .18s ease, color .18s ease;
}

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

.btn-primary:hover,
.btn-primary:focus-visible {
  background-color: var(--brand-deep);
  border-color: var(--brand-deep);
  color: #ffffff;
  text-decoration: none;
}

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

.btn-ghost:hover,
.btn-ghost:focus-visible {
  border-color: var(--brand);
  color: var(--brand);
  text-decoration: none;
}

.text-link {
  display: inline-block;
  font-size: 15px;
  font-weight: 700;
  color: var(--brand);
  text-decoration: none;
}

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

.text-link:hover,
.text-link:focus-visible {
  color: var(--brand-deep);
  text-decoration: underline;
}

.tag {
  display: inline-block;
  padding: 2px 10px;
  font-size: 13px;
  font-weight: 700;
  border-radius: 4px;
}

.tag-fit {
  background-color: #e8eff7;
  color: var(--brand-deep);
}

.tag-unfit {
  background-color: #f6ece4;
  color: #8f4f22;
}

/* 图片与图注 */
.hero-figure,
.section-media,
.direction-media,
.stage-figure,
.scene-media,
.page-figure,
.section-figure {
  margin: 0;
  overflow: hidden;
  background-color: #e9edf2;
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.hero-figure img,
.section-media img,
.direction-media img,
.stage-figure img,
.scene-media img,
.page-figure img,
.section-figure img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero-caption,
.section-media figcaption,
.direction-media figcaption,
.stage-figure figcaption,
.scene-media figcaption,
.figure-caption,
.section-figure figcaption {
  padding: 10px 14px;
  font-size: 13.5px;
  line-height: 1.65;
  color: var(--ink-soft);
  border-top: 1px solid var(--line);
}

/* 原生展开收起 */
.faq-item {
  background-color: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

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

.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  min-height: 52px;
  padding: 14px 18px;
  font-size: 15.5px;
  font-weight: 700;
  color: var(--ink);
  cursor: pointer;
  list-style: none;
}

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

.faq-question::after {
  content: "+";
  flex: 0 0 auto;
  font-size: 20px;
  font-weight: 400;
  line-height: 1;
  color: var(--brand);
}

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

.faq-item[open] > .faq-question {
  border-bottom: 1px solid var(--line);
}

.faq-answer {
  padding: 14px 18px 18px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink-soft);
}

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

/* 下一步入口条 */
.next-step {
  margin-top: 40px;
  padding: 28px 0 0;
  border-top: 1px solid var(--line);
}

.next-step-inner {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 32px;
}

.next-step-text {
  max-width: 560px;
}

.next-step-title {
  font-size: 22px;
  font-weight: 700;
  color: var(--ink);
}

.next-step-text p {
  margin-top: 10px;
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--ink-soft);
}

.next-step-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.next-step-link,
.next-link {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0 18px;
  font-size: 15px;
  font-weight: 700;
  color: var(--brand);
  background-color: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  text-decoration: none;
}

.next-step-link:hover,
.next-step-link:focus-visible,
.next-link:hover,
.next-link:focus-visible {
  border-color: var(--brand);
  color: var(--brand-deep);
  text-decoration: none;
}

.next-step-list {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  margin-top: 20px;
}

.next-step-item a {
  display: flex;
  align-items: center;
  min-height: 44px;
  padding: 12px 16px;
  font-size: 15px;
  font-weight: 700;
  color: var(--brand);
  background-color: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  text-decoration: none;
}

.next-step-item a:hover,
.next-step-item a:focus-visible {
  border-color: var(--brand);
  color: var(--brand-deep);
  text-decoration: none;
}

.next-step-item span {
  display: block;
  margin-top: 8px;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--ink-soft);
}

/* --------------------------------------------------------------------------
   pages — 首页
   -------------------------------------------------------------------------- */

/* 首屏 */
.hero-section {
  padding: 48px 0 44px;
  border-bottom: 1px solid var(--line);
}

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

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

.hero-kicker {
  margin-bottom: 12px;
  font-size: 13.5px;
  font-weight: 700;
  color: var(--accent);
}

.hero-title {
  font-size: 34px;
  font-weight: 700;
  line-height: 1.3;
  color: var(--ink);
}

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

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

.hero-media {
  display: flex;
  flex-direction: column;
  gap: 18px;
}

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

.hero-log {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 18px 20px;
  background-color: var(--bg-card);
  border: 1px solid var(--line);
  border-left: 3px solid var(--accent);
  border-radius: var(--radius);
}

.hero-log-item {
  display: flex;
  gap: 14px;
  align-items: baseline;
  font-size: 14.5px;
  line-height: 1.7;
}

.hero-log-date {
  flex: 0 0 auto;
  font-variant-numeric: tabular-nums;
  font-weight: 700;
  color: var(--brand);
}

.hero-log-text {
  color: var(--ink-soft);
}

/* 服务方向时间线 */
.directions-section {
  padding: 48px 0;
  border-bottom: 1px solid var(--line);
}

.section-head {
  max-width: var(--read);
}

.timeline {
  position: relative;
  margin-top: 32px;
  padding-left: 30px;
  border-left: 2px solid var(--line);
}

.timeline-node {
  position: relative;
  padding-bottom: 28px;
}

.timeline-node:last-child {
  padding-bottom: 0;
}

.timeline-marker {
  position: absolute;
  left: -38px;
  top: 8px;
  width: 14px;
  height: 14px;
  background-color: var(--bg-card);
  border: 3px solid var(--brand);
  border-radius: 50%;
}

.timeline-body {
  max-width: 720px;
  padding: 16px 20px;
  background-color: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

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

.timeline-scene {
  margin-top: 8px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink-soft);
}

.timeline-exclude {
  margin-top: 8px;
  padding-left: 12px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--ink-soft);
  border-left: 2px solid var(--line);
}

.timeline-body .text-link {
  margin-top: 12px;
}

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

.directions-section .section-media img {
  aspect-ratio: 21 / 9;
}

/* 合作阶段与交付标准摘要 */
.stages-section {
  padding: 48px 0;
  border-bottom: 1px solid var(--line);
}

.stages-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr);
  gap: 48px;
  align-items: start;
}

.stages-col .section-head {
  max-width: none;
}

.stage-list {
  margin-top: 22px;
}

.stage-item {
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr);
  gap: 4px 14px;
  padding: 14px 0;
  border-top: 1px solid var(--line);
}

.stage-item:last-child {
  border-bottom: 1px solid var(--line);
}

.stage-index {
  grid-row: span 2;
  font-size: 15px;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  color: var(--accent);
}

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

.stage-desc {
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--ink-soft);
}

.stages-col .text-link {
  margin-top: 18px;
}

.standard-list {
  margin-top: 22px;
  background-color: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.standard-item {
  padding: 14px 18px;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--ink-soft);
}

.standard-item + .standard-item {
  border-top: 1px solid var(--line);
}

/* 常见需求场景 */
.scenarios-section {
  padding: 48px 0;
  border-bottom: 1px solid var(--line);
}

.scenario-list {
  margin-top: 28px;
}

.scenario-item {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 8px 28px;
  align-items: center;
  padding: 16px 0;
  border-top: 1px solid var(--line);
}

.scenario-item:last-child {
  border-bottom: 1px solid var(--line);
}

.scenario-situation {
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--ink);
}

.scenario-map {
  margin-top: 4px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--ink-soft);
}

.scenario-link {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0 16px;
  font-size: 14.5px;
  font-weight: 700;
  color: var(--brand);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  text-decoration: none;
  white-space: nowrap;
}

.scenario-link:hover,
.scenario-link:focus-visible {
  border-color: var(--brand);
  color: var(--brand-deep);
  text-decoration: none;
}

/* 首页常见问题 */
.faq-section {
  padding: 48px 0;
  border-bottom: 1px solid var(--line);
}

.faq-groups {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 28px 32px;
  margin-top: 28px;
}

.faq-group-title {
  margin-bottom: 12px;
  font-size: 16px;
  font-weight: 700;
  color: var(--ink);
}

.faq-section > .text-link {
  margin-top: 24px;
}

/* 站内栏目索引 */
.index-section {
  padding: 48px 0;
}

.column-index {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  margin-top: 28px;
}

.column-card {
  display: flex;
}

.column-link {
  display: flex;
  flex-direction: column;
  gap: 6px;
  width: 100%;
  padding: 18px 20px;
  background-color: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  text-decoration: none;
  transition: border-color .18s ease, background-color .18s ease;
}

.column-link:hover,
.column-link:focus-visible {
  border-color: var(--brand);
  background-color: #f2f6fa;
  text-decoration: none;
}

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

.column-desc {
  font-size: 14px;
  line-height: 1.7;
  color: var(--ink-soft);
}

/* --------------------------------------------------------------------------
   pages — 服务方向
   -------------------------------------------------------------------------- */

.directions-section .direction-block {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 420px);
  gap: 36px;
  align-items: start;
  padding: 32px 0;
  border-top: 1px solid var(--line);
}

.directions-section .direction-block:first-of-type {
  border-top: none;
  padding-top: 8px;
}

.direction-body {
  max-width: 620px;
}

.direction-index {
  margin-bottom: 6px;
  font-size: 13.5px;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  color: var(--accent);
}

.direction-name {
  font-size: 20px;
  font-weight: 700;
  color: var(--ink);
}

.direction-desc {
  margin-top: 12px;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--ink-soft);
}

.direction-work {
  margin-top: 10px;
  font-size: 15px;
  line-height: 1.85;
  color: var(--ink-soft);
}

.direction-fit,
.direction-unfit {
  display: flex;
  align-items: baseline;
  gap: 10px;
  margin-top: 12px;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--ink);
}

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

.compare-table {
  margin-top: 28px;
  background-color: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.compare-row {
  display: grid;
  grid-template-columns: minmax(160px, 1fr) minmax(0, 2fr) minmax(0, 2fr);
}

.compare-row + .compare-row {
  border-top: 1px solid var(--line);
}

.compare-head {
  background-color: #eef2f6;
}

.compare-cell {
  padding: 14px 18px;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--ink-soft);
}

.compare-head .compare-cell {
  font-weight: 700;
  color: var(--ink);
}

.compare-name {
  font-weight: 700;
  color: var(--ink);
}

.combo-list {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  margin-top: 28px;
}

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

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

.combo-desc {
  margin-top: 10px;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--ink-soft);
}

.choose-list {
  margin-top: 28px;
  counter-reset: choose;
}

.choose-item {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 6px 32px;
  padding: 16px 0;
  border-top: 1px solid var(--line);
}

.choose-item:last-child {
  border-bottom: 1px solid var(--line);
}

.choose-question {
  font-size: 15.5px;
  font-weight: 700;
  line-height: 1.8;
  color: var(--ink);
}

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

.next-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 20px;
}

.next-link-item {
  display: flex;
}

/* --------------------------------------------------------------------------
   pages — 合作流程
   -------------------------------------------------------------------------- */

.stage-overview .stage-strip {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
  margin-top: 28px;
}

.stage-strip-item {
  padding: 20px;
  background-color: var(--bg-card);
  border: 1px solid var(--line);
  border-top: 3px solid var(--brand);
  border-radius: var(--radius);
}

.stage-strip-item .stage-index {
  display: block;
  margin-bottom: 8px;
  font-size: 13.5px;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  color: var(--accent);
}

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

.stage-strip-goal {
  margin-top: 10px;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--ink-soft);
}

.stage-overview .stage-figure,
.stage-checkpoints .stage-figure {
  margin-top: 28px;
}

.stage-overview .stage-figure img,
.stage-checkpoints .stage-figure img {
  aspect-ratio: 21 / 9;
}

.duty-block {
  margin-top: 28px;
  background-color: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.duty-block-head {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding: 18px 20px;
  background-color: #eef2f6;
  border-bottom: 1px solid var(--line);
}

.duty-index {
  font-size: 14px;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  color: var(--accent);
}

.duty-block-title {
  font-size: 18px;
  font-weight: 700;
  color: var(--ink);
}

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

.duty-row + .duty-row {
  border-top: 1px solid var(--line);
}

.duty-row-head {
  background-color: #f7f9fb;
}

.duty-cell {
  padding: 13px 20px;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--ink-soft);
}

.duty-row-head .duty-cell {
  font-weight: 700;
  color: var(--ink);
}

.duty-cell + .duty-cell {
  border-left: 1px solid var(--line);
}

.duty-output {
  padding: 14px 20px;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--ink-soft);
  border-top: 1px solid var(--line);
}

.duty-output-label {
  margin-right: 10px;
  font-weight: 700;
  color: var(--brand);
}

.checkpoint-list {
  margin-top: 28px;
}

.checkpoint-item {
  padding: 18px 0;
  border-top: 1px solid var(--line);
}

.checkpoint-item:last-child {
  border-bottom: 1px solid var(--line);
}

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

.checkpoint-method,
.checkpoint-change {
  margin-top: 8px;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--ink-soft);
}

.record-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  margin-top: 28px;
}

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

.record-card-title {
  font-size: 16px;
  font-weight: 700;
  color: var(--ink);
}

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

.record-list li {
  position: relative;
  padding-left: 16px;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--ink-soft);
}

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

.record-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 11px;
  width: 6px;
  height: 6px;
  background-color: var(--brand);
  border-radius: 50%;
}

/* --------------------------------------------------------------------------
   pages — 交付标准
   -------------------------------------------------------------------------- */

.delivery-scene {
  padding: 8px 0 40px;
}

.scene-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 460px);
  gap: 40px;
  align-items: start;
}

.scene-text {
  max-width: 600px;
}

.scene-text p {
  margin-top: 14px;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--ink-soft);
}

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

.checklist {
  margin-top: 28px;
  background-color: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.checklist-item {
  display: grid;
  grid-template-columns: 56px minmax(0, 1fr);
  gap: 0 16px;
  padding: 18px 20px;
}

.checklist-item + .checklist-item {
  border-top: 1px solid var(--line);
}

.checklist-no {
  font-size: 15px;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  color: var(--accent);
}

.checklist-body {
  max-width: 760px;
}

.checklist-title {
  font-size: 16px;
  font-weight: 700;
  color: var(--ink);
}

.checklist-body > p {
  margin-top: 8px;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--ink-soft);
}

.checklist-verify {
  padding-left: 12px;
  border-left: 2px solid var(--line);
}

.acceptance-steps {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
  margin-top: 28px;
}

.acceptance-step {
  padding: 20px;
  background-color: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.acceptance-step .step-index {
  display: block;
  margin-bottom: 8px;
  font-size: 13.5px;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  color: var(--accent);
}

.acceptance-step .step-title {
  font-size: 16px;
  font-weight: 700;
  color: var(--ink);
}

.acceptance-step p {
  margin-top: 10px;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--ink-soft);
}

.revision-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 24px;
  margin-top: 28px;
}

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

.revision-title {
  font-size: 17px;
  font-weight: 700;
  color: var(--ink);
}

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

.revision-list li {
  position: relative;
  padding-left: 16px;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--ink-soft);
}

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

.revision-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 11px;
  width: 6px;
  height: 6px;
  background-color: var(--brand);
  border-radius: 50%;
}

.revision-note {
  margin-top: 14px;
  padding-top: 12px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--ink-soft);
  border-top: 1px solid var(--line);
}

.boundary-table {
  margin-top: 28px;
  background-color: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

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

.boundary-row + .boundary-row {
  border-top: 1px solid var(--line);
}

.boundary-head {
  background-color: #eef2f6;
}

.boundary-cell {
  padding: 14px 20px;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--ink-soft);
}

.boundary-head .boundary-cell {
  font-weight: 700;
  color: var(--ink);
}

.boundary-cell + .boundary-cell {
  border-left: 1px solid var(--line);
}

.boundary-exclude {
  margin-top: 24px;
  padding: 20px 22px;
  background-color: var(--bg-card);
  border: 1px solid var(--line);
  border-left: 3px solid var(--accent);
  border-radius: var(--radius);
}

.boundary-exclude-title {
  font-size: 16px;
  font-weight: 700;
  color: var(--ink);
}

.boundary-exclude p {
  margin-top: 10px;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--ink-soft);
}

/* --------------------------------------------------------------------------
   pages — 准备事项
   -------------------------------------------------------------------------- */

.page-layout {
  display: block;
}

.content-main {
  max-width: 860px;
}

.content-section {
  padding: 32px 0;
  border-top: 1px solid var(--line);
}

.content-section:first-child {
  border-top: none;
  padding-top: 8px;
}

.content-section h2 {
  font-size: 22px;
  font-weight: 700;
  color: var(--ink);
}

.content-section > p {
  margin-top: 12px;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--ink-soft);
}

.content-section > p + p {
  margin-top: 10px;
}

.content-section .section-figure {
  margin-top: 20px;
}

.content-section .section-figure img {
  aspect-ratio: 21 / 9;
}

.check-list {
  margin-top: 22px;
  background-color: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.check-item {
  display: grid;
  grid-template-columns: 26px minmax(0, 1fr);
  gap: 0 14px;
  padding: 14px 20px;
}

.check-item + .check-item {
  border-top: 1px solid var(--line);
}

.check-box {
  display: block;
  width: 16px;
  height: 16px;
  margin-top: 6px;
  border: 2px solid var(--brand);
  border-radius: 3px;
}

.check-body {
  max-width: 720px;
}

.check-title {
  font-size: 15.5px;
  font-weight: 700;
  line-height: 1.75;
  color: var(--ink);
}

.check-body p {
  margin-top: 6px;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--ink-soft);
}

/* --------------------------------------------------------------------------
   pages — 常见问题
   -------------------------------------------------------------------------- */

.page-figure {
  margin-bottom: 36px;
}

.page-figure img {
  aspect-ratio: 21 / 9;
}

.faq-section .section-title {
  margin-bottom: 6px;
}

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

.faq-section .faq-item:first-of-type {
  margin-top: 20px;
}

/* --------------------------------------------------------------------------
   pages — 404
   -------------------------------------------------------------------------- */

.error-main {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 64px 24px;
}

.error-panel {
  width: 100%;
  max-width: 620px;
  padding: 40px 32px;
  background-color: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.error-code {
  font-size: 14px;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  color: var(--accent);
}

.error-title {
  margin-top: 10px;
  font-size: 30px;
  font-weight: 700;
  color: var(--ink);
}

.error-text {
  margin-top: 14px;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--ink-soft);
}

.error-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

/* --------------------------------------------------------------------------
   responsive
   -------------------------------------------------------------------------- */

@media (max-width: 960px) {
  .header-inner {
    flex-wrap: wrap;
    gap: 12px;
  }

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

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

  .nav-list {
    position: absolute;
    top: calc(100% + 10px);
    right: 0;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    width: min(320px, calc(100vw - 48px));
    padding: 8px;
    background-color: var(--bg-card);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    box-shadow: 0 10px 24px rgba(31, 39, 51, .12);
  }

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

  .nav-link {
    width: 100%;
    padding: 0 14px;
    border-bottom: none;
    border-left: 3px solid transparent;
  }

  .nav-link.is-current {
    border-bottom: none;
    border-left-color: var(--brand);
    background-color: #f2f6fa;
  }

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

  .hero-copy,
  .scene-text,
  .direction-body {
    max-width: none;
  }

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

  .directions-section .direction-media {
    max-width: 520px;
  }

  .compare-row {
    grid-template-columns: minmax(120px, 1fr) minmax(0, 1.6fr) minmax(0, 1.6fr);
  }

  .faq-groups,
  .combo-list,
  .record-grid,
  .column-index,
  .revision-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

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

  .next-step-inner {
    flex-direction: column;
    gap: 20px;
  }

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

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

@media (max-width: 640px) {
  .container,
  .inner-main,
  .header-inner,
  .fact-bar-text {
    padding-left: 18px;
    padding-right: 18px;
  }

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

  .section-title {
    font-size: 21px;
  }

  .content-section h2 {
    font-size: 20px;
  }

  .hero-section {
    padding: 34px 0 32px;
  }

  .hero-actions .btn {
    flex: 1 1 auto;
  }

  .timeline {
    padding-left: 22px;
  }

  .timeline-marker {
    left: -30px;
    width: 12px;
    height: 12px;
  }

  .timeline-body {
    padding: 14px 16px;
  }

  .stage-item {
    grid-template-columns: 34px minmax(0, 1fr);
  }

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

  .scenario-link {
    justify-self: start;
  }

  .faq-groups,
  .combo-list,
  .record-grid,
  .column-index,
  .revision-grid,
  .stage-overview .stage-strip,
  .acceptance-steps,
  .next-step-list {
    grid-template-columns: minmax(0, 1fr);
  }

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

  .compare-head {
    display: none;
  }

  .compare-cell {
    padding: 10px 16px;
  }

  .compare-cell + .compare-cell {
    border-top: 1px solid var(--line);
  }

  .compare-name {
    background-color: #f7f9fb;
  }

  .choose-item {
    grid-template-columns: minmax(0, 1fr);
    gap: 6px;
  }

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

  .duty-cell + .duty-cell {
    border-left: none;
    border-top: 1px solid var(--line);
  }

  .duty-row-head {
    display: none;
  }

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

  .boundary-head {
    display: none;
  }

  .boundary-cell + .boundary-cell {
    border-left: none;
    border-top: 1px solid var(--line);
  }

  .checklist-item {
    grid-template-columns: 34px minmax(0, 1fr);
    padding: 14px 16px;
  }

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

  .error-panel {
    padding: 28px 20px;
  }

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

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

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

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

  .btn,
  .column-link {
    transition: none;
  }
}